//! Linux-specific definitions for linux-like values

use core::mem::size_of;

use crate::prelude::*;
use crate::{sock_filter, _IO, _IOR, _IOW, _IOWR};

pub type useconds_t = u32;
pub type dev_t = u64;
pub type socklen_t = u32;
pub type mode_t = u32;
pub type ino64_t = u64;
pub type off64_t = i64;
pub type blkcnt64_t = i64;
pub type rlim64_t = u64;
pub type mqd_t = c_int;
pub type nfds_t = c_ulong;
pub type nl_item = c_int;
pub type idtype_t = c_uint;
pub type loff_t = c_longlong;
pub type pthread_key_t = c_uint;
pub type pthread_once_t = c_int;
pub type pthread_spinlock_t = c_int;
pub type __kernel_fsid_t = __c_anonymous__kernel_fsid_t;
pub type __kernel_clockid_t = c_int;

pub type __u8 = c_uchar;
pub type __u16 = c_ushort;
pub type __s16 = c_short;
pub type __u32 = c_uint;
pub type __s32 = c_int;

pub type Elf32_Half = u16;
pub type Elf32_Word = u32;
pub type Elf32_Off = u32;
pub type Elf32_Addr = u32;
pub type Elf32_Xword = u64;
pub type Elf32_Sword = i32;

pub type Elf64_Half = u16;
pub type Elf64_Word = u32;
pub type Elf64_Off = u64;
pub type Elf64_Addr = u64;
pub type Elf64_Xword = u64;
pub type Elf64_Sxword = i64;
pub type Elf64_Sword = i32;

pub type Elf32_Section = u16;
pub type Elf64_Section = u16;

pub type Elf32_Relr = Elf32_Word;
pub type Elf64_Relr = Elf32_Xword;
pub type Elf32_Rel = __c_anonymous_elf32_rel;
pub type Elf64_Rel = __c_anonymous_elf64_rel;

cfg_if! {
    if #[cfg(not(target_arch = "sparc64"))] {
        pub type Elf32_Rela = __c_anonymous_elf32_rela;
        pub type Elf64_Rela = __c_anonymous_elf64_rela;
    }
}

// linux/can.h
pub type canid_t = u32;

// linux/can/j1939.h
pub type can_err_mask_t = u32;
pub type pgn_t = u32;
pub type priority_t = u8;
pub type name_t = u64;

pub type iconv_t = *mut c_void;

// linux/sctp.h
pub type sctp_assoc_t = __s32;

pub type eventfd_t = u64;

cfg_if! {
    if #[cfg(not(target_env = "gnu"))] {
        missing! {
            #[cfg_attr(feature = "extra_traits", derive(Debug))]
            pub enum fpos64_t {} // FIXME(linux): fill this out with a struct
        }
    }
}

e! {
    #[repr(u32)]
    pub enum tpacket_versions {
        TPACKET_V1,
        TPACKET_V2,
        TPACKET_V3,
    }
}

c_enum! {
    pid_type {
        PIDTYPE_PID,
        PIDTYPE_TGID,
        PIDTYPE_PGID,
        PIDTYPE_SID,
        PIDTYPE_MAX,
    }
}

s! {
    pub struct glob_t {
        pub gl_pathc: size_t,
        pub gl_pathv: *mut *mut c_char,
        pub gl_offs: size_t,
        pub gl_flags: c_int,

        __unused1: *mut c_void,
        __unused2: *mut c_void,
        __unused3: *mut c_void,
        __unused4: *mut c_void,
        __unused5: *mut c_void,
    }

    pub struct passwd {
        pub pw_name: *mut c_char,
        pub pw_passwd: *mut c_char,
        pub pw_uid: crate::uid_t,
        pub pw_gid: crate::gid_t,
        pub pw_gecos: *mut c_char,
        pub pw_dir: *mut c_char,
        pub pw_shell: *mut c_char,
    }

    pub struct spwd {
        pub sp_namp: *mut c_char,
        pub sp_pwdp: *mut c_char,
        pub sp_lstchg: c_long,
        pub sp_min: c_long,
        pub sp_max: c_long,
        pub sp_warn: c_long,
        pub sp_inact: c_long,
        pub sp_expire: c_long,
        pub sp_flag: c_ulong,
    }

    pub struct dqblk {
        pub dqb_bhardlimit: u64,
        pub dqb_bsoftlimit: u64,
        pub dqb_curspace: u64,
        pub dqb_ihardlimit: u64,
        pub dqb_isoftlimit: u64,
        pub dqb_curinodes: u64,
        pub dqb_btime: u64,
        pub dqb_itime: u64,
        pub dqb_valid: u32,
    }

    pub struct signalfd_siginfo {
        pub ssi_signo: u32,
        pub ssi_errno: i32,
        pub ssi_code: i32,
        pub ssi_pid: u32,
        pub ssi_uid: u32,
        pub ssi_fd: i32,
        pub ssi_tid: u32,
        pub ssi_band: u32,
        pub ssi_overrun: u32,
        pub ssi_trapno: u32,
        pub ssi_status: i32,
        pub ssi_int: i32,
        pub ssi_ptr: u64,
        pub ssi_utime: u64,
        pub ssi_stime: u64,
        pub ssi_addr: u64,
        pub ssi_addr_lsb: u16,
        _pad2: u16,
        pub ssi_syscall: i32,
        pub ssi_call_addr: u64,
        pub ssi_arch: u32,
        _pad: [u8; 28],
    }

    pub struct itimerspec {
        pub it_interval: crate::timespec,
        pub it_value: crate::timespec,
    }

    pub struct fsid_t {
        __val: [c_int; 2],
    }

    pub struct fanout_args {
        #[cfg(target_endian = "little")]
        pub id: __u16,
        pub type_flags: __u16,
        #[cfg(target_endian = "big")]
        pub id: __u16,
        pub max_num_members: __u32,
    }

    pub struct packet_mreq {
        pub mr_ifindex: c_int,
        pub mr_type: c_ushort,
        pub mr_alen: c_ushort,
        pub mr_address: [c_uchar; 8],
    }

    #[deprecated(since = "0.2.70", note = "sockaddr_ll type must be used instead")]
    pub struct sockaddr_pkt {
        pub spkt_family: c_ushort,
        pub spkt_device: [c_uchar; 14],
        pub spkt_protocol: c_ushort,
    }

    pub struct tpacket_auxdata {
        pub tp_status: __u32,
        pub tp_len: __u32,
        pub tp_snaplen: __u32,
        pub tp_mac: __u16,
        pub tp_net: __u16,
        pub tp_vlan_tci: __u16,
        pub tp_vlan_tpid: __u16,
    }

    pub struct tpacket_hdr {
        pub tp_status: c_ulong,
        pub tp_len: c_uint,
        pub tp_snaplen: c_uint,
        pub tp_mac: c_ushort,
        pub tp_net: c_ushort,
        pub tp_sec: c_uint,
        pub tp_usec: c_uint,
    }

    pub struct tpacket_hdr_variant1 {
        pub tp_rxhash: __u32,
        pub tp_vlan_tci: __u32,
        pub tp_vlan_tpid: __u16,
        pub tp_padding: __u16,
    }

    pub struct tpacket2_hdr {
        pub tp_status: __u32,
        pub tp_len: __u32,
        pub tp_snaplen: __u32,
        pub tp_mac: __u16,
        pub tp_net: __u16,
        pub tp_sec: __u32,
        pub tp_nsec: __u32,
        pub tp_vlan_tci: __u16,
        pub tp_vlan_tpid: __u16,
        pub tp_padding: [__u8; 4],
    }

    pub struct tpacket_req {
        pub tp_block_size: c_uint,
        pub tp_block_nr: c_uint,
        pub tp_frame_size: c_uint,
        pub tp_frame_nr: c_uint,
    }

    pub struct tpacket_req3 {
        pub tp_block_size: c_uint,
        pub tp_block_nr: c_uint,
        pub tp_frame_size: c_uint,
        pub tp_frame_nr: c_uint,
        pub tp_retire_blk_tov: c_uint,
        pub tp_sizeof_priv: c_uint,
        pub tp_feature_req_word: c_uint,
    }

    #[repr(align(8))]
    pub struct tpacket_rollover_stats {
        pub tp_all: crate::__u64,
        pub tp_huge: crate::__u64,
        pub tp_failed: crate::__u64,
    }

    pub struct tpacket_stats {
        pub tp_packets: c_uint,
        pub tp_drops: c_uint,
    }

    pub struct tpacket_stats_v3 {
        pub tp_packets: c_uint,
        pub tp_drops: c_uint,
        pub tp_freeze_q_cnt: c_uint,
    }

    pub struct tpacket3_hdr {
        pub tp_next_offset: __u32,
        pub tp_sec: __u32,
        pub tp_nsec: __u32,
        pub tp_snaplen: __u32,
        pub tp_len: __u32,
        pub tp_status: __u32,
        pub tp_mac: __u16,
        pub tp_net: __u16,
        pub hv1: crate::tpacket_hdr_variant1,
        pub tp_padding: [__u8; 8],
    }

    pub struct tpacket_bd_ts {
        pub ts_sec: c_uint,
        pub ts_usec: c_uint,
    }

    #[repr(align(8))]
    pub struct tpacket_hdr_v1 {
        pub block_status: __u32,
        pub num_pkts: __u32,
        pub offset_to_first_pkt: __u32,
        pub blk_len: __u32,
        pub seq_num: crate::__u64,
        pub ts_first_pkt: crate::tpacket_bd_ts,
        pub ts_last_pkt: crate::tpacket_bd_ts,
    }

    pub struct cpu_set_t {
        #[cfg(all(target_pointer_width = "32", not(target_arch = "x86_64")))]
        bits: [u32; 32],
        #[cfg(not(all(target_pointer_width = "32", not(target_arch = "x86_64"))))]
        bits: [u64; 16],
    }

    pub struct if_nameindex {
        pub if_index: c_uint,
        pub if_name: *mut c_char,
    }

    // System V IPC
    pub struct msginfo {
        pub msgpool: c_int,
        pub msgmap: c_int,
        pub msgmax: c_int,
        pub msgmnb: c_int,
        pub msgmni: c_int,
        pub msgssz: c_int,
        pub msgtql: c_int,
        pub msgseg: c_ushort,
    }

    pub struct sembuf {
        pub sem_num: c_ushort,
        pub sem_op: c_short,
        pub sem_flg: c_short,
    }

    pub struct input_event {
        // FIXME(1.0): Change to the commented variant, see https://github.com/rust-lang/libc/pull/4148#discussion_r1857511742
        #[cfg(any(target_pointer_width = "64", not(linux_time_bits64)))]
        pub time: crate::timeval,
        // #[cfg(any(target_pointer_width = "64", not(linux_time_bits64)))]
        // pub input_event_sec: time_t,
        // #[cfg(any(target_pointer_width = "64", not(linux_time_bits64)))]
        // pub input_event_usec: suseconds_t,
        // #[cfg(target_arch = "sparc64")]
        // _pad1: c_int,
        #[cfg(all(target_pointer_width = "32", linux_time_bits64))]
        pub input_event_sec: c_ulong,

        #[cfg(all(target_pointer_width = "32", linux_time_bits64))]
        pub input_event_usec: c_ulong,

        pub type_: __u16,
        pub code: __u16,
        pub value: __s32,
    }

    pub struct input_id {
        pub bustype: __u16,
        pub vendor: __u16,
        pub product: __u16,
        pub version: __u16,
    }

    pub struct input_absinfo {
        pub value: __s32,
        pub minimum: __s32,
        pub maximum: __s32,
        pub fuzz: __s32,
        pub flat: __s32,
        pub resolution: __s32,
    }

    pub struct input_keymap_entry {
        pub flags: __u8,
        pub len: __u8,
        pub index: __u16,
        pub keycode: __u32,
        pub scancode: [__u8; 32],
    }

    pub struct input_mask {
        pub type_: __u32,
        pub codes_size: __u32,
        pub codes_ptr: crate::__u64,
    }

    pub struct ff_replay {
        pub length: __u16,
        pub delay: __u16,
    }

    pub struct ff_trigger {
        pub button: __u16,
        pub interval: __u16,
    }

    pub struct ff_envelope {
        pub attack_length: __u16,
        pub attack_level: __u16,
        pub fade_length: __u16,
        pub fade_level: __u16,
    }

    pub struct ff_constant_effect {
        pub level: __s16,
        pub envelope: ff_envelope,
    }

    pub struct ff_ramp_effect {
        pub start_level: __s16,
        pub end_level: __s16,
        pub envelope: ff_envelope,
    }

    pub struct ff_condition_effect {
        pub right_saturation: __u16,
        pub left_saturation: __u16,

        pub right_coeff: __s16,
        pub left_coeff: __s16,

        pub deadband: __u16,
        pub center: __s16,
    }

    pub struct ff_periodic_effect {
        pub waveform: __u16,
        pub period: __u16,
        pub magnitude: __s16,
        pub offset: __s16,
        pub phase: __u16,

        pub envelope: ff_envelope,

        pub custom_len: __u32,
        pub custom_data: *mut __s16,
    }

    pub struct ff_rumble_effect {
        pub strong_magnitude: __u16,
        pub weak_magnitude: __u16,
    }

    pub struct ff_effect {
        pub type_: __u16,
        pub id: __s16,
        pub direction: __u16,
        pub trigger: ff_trigger,
        pub replay: ff_replay,
        // FIXME(1.0): this is actually a union
        #[cfg(target_pointer_width = "64")]
        pub u: [u64; 4],
        #[cfg(target_pointer_width = "32")]
        pub u: [u32; 7],
    }

    pub struct uinput_ff_upload {
        pub request_id: __u32,
        pub retval: __s32,
        pub effect: ff_effect,
        pub old: ff_effect,
    }

    pub struct uinput_ff_erase {
        pub request_id: __u32,
        pub retval: __s32,
        pub effect_id: __u32,
    }

    pub struct uinput_abs_setup {
        pub code: __u16,
        pub absinfo: input_absinfo,
    }

    pub struct dl_phdr_info {
        #[cfg(target_pointer_width = "64")]
        pub dlpi_addr: Elf64_Addr,
        #[cfg(target_pointer_width = "32")]
        pub dlpi_addr: Elf32_Addr,

        pub dlpi_name: *const c_char,

        #[cfg(target_pointer_width = "64")]
        pub dlpi_phdr: *const Elf64_Phdr,
        #[cfg(target_pointer_width = "32")]
        pub dlpi_phdr: *const Elf32_Phdr,

        #[cfg(target_pointer_width = "64")]
        pub dlpi_phnum: Elf64_Half,
        #[cfg(target_pointer_width = "32")]
        pub dlpi_phnum: Elf32_Half,

        // As of uClibc 1.0.36, the following fields are
        // gated behind a "#if 0" block which always evaluates
        // to false. So I'm just removing these, and if uClibc changes
        // the #if block in the future to include the following fields, these
        // will probably need including here. tsidea, skrap
        // QNX (NTO) platform does not define these fields
        #[cfg(not(any(target_env = "uclibc", target_os = "nto")))]
        pub dlpi_adds: c_ulonglong,
        #[cfg(not(any(target_env = "uclibc", target_os = "nto")))]
        pub dlpi_subs: c_ulonglong,
        #[cfg(not(any(target_env = "uclibc", target_os = "nto")))]
        pub dlpi_tls_modid: size_t,
        #[cfg(not(any(target_env = "uclibc", target_os = "nto")))]
        pub dlpi_tls_data: *mut c_void,
    }

    pub struct Elf32_Ehdr {
        pub e_ident: [c_uchar; 16],
        pub e_type: Elf32_Half,
        pub e_machine: Elf32_Half,
        pub e_version: Elf32_Word,
        pub e_entry: Elf32_Addr,
        pub e_phoff: Elf32_Off,
        pub e_shoff: Elf32_Off,
        pub e_flags: Elf32_Word,
        pub e_ehsize: Elf32_Half,
        pub e_phentsize: Elf32_Half,
        pub e_phnum: Elf32_Half,
        pub e_shentsize: Elf32_Half,
        pub e_shnum: Elf32_Half,
        pub e_shstrndx: Elf32_Half,
    }

    pub struct Elf64_Ehdr {
        pub e_ident: [c_uchar; 16],
        pub e_type: Elf64_Half,
        pub e_machine: Elf64_Half,
        pub e_version: Elf64_Word,
        pub e_entry: Elf64_Addr,
        pub e_phoff: Elf64_Off,
        pub e_shoff: Elf64_Off,
        pub e_flags: Elf64_Word,
        pub e_ehsize: Elf64_Half,
        pub e_phentsize: Elf64_Half,
        pub e_phnum: Elf64_Half,
        pub e_shentsize: Elf64_Half,
        pub e_shnum: Elf64_Half,
        pub e_shstrndx: Elf64_Half,
    }

    pub struct Elf32_Sym {
        pub st_name: Elf32_Word,
        pub st_value: Elf32_Addr,
        pub st_size: Elf32_Word,
        pub st_info: c_uchar,
        pub st_other: c_uchar,
        pub st_shndx: Elf32_Section,
    }

    pub struct Elf64_Sym {
        pub st_name: Elf64_Word,
        pub st_info: c_uchar,
        pub st_other: c_uchar,
        pub st_shndx: Elf64_Section,
        pub st_value: Elf64_Addr,
        pub st_size: Elf64_Xword,
    }

    pub struct Elf32_Phdr {
        pub p_type: Elf32_Word,
        pub p_offset: Elf32_Off,
        pub p_vaddr: Elf32_Addr,
        pub p_paddr: Elf32_Addr,
        pub p_filesz: Elf32_Word,
        pub p_memsz: Elf32_Word,
        pub p_flags: Elf32_Word,
        pub p_align: Elf32_Word,
    }

    pub struct Elf64_Phdr {
        pub p_type: Elf64_Word,
        pub p_flags: Elf64_Word,
        pub p_offset: Elf64_Off,
        pub p_vaddr: Elf64_Addr,
        pub p_paddr: Elf64_Addr,
        pub p_filesz: Elf64_Xword,
        pub p_memsz: Elf64_Xword,
        pub p_align: Elf64_Xword,
    }

    pub struct Elf32_Shdr {
        pub sh_name: Elf32_Word,
        pub sh_type: Elf32_Word,
        pub sh_flags: Elf32_Word,
        pub sh_addr: Elf32_Addr,
        pub sh_offset: Elf32_Off,
        pub sh_size: Elf32_Word,
        pub sh_link: Elf32_Word,
        pub sh_info: Elf32_Word,
        pub sh_addralign: Elf32_Word,
        pub sh_entsize: Elf32_Word,
    }

    pub struct Elf64_Shdr {
        pub sh_name: Elf64_Word,
        pub sh_type: Elf64_Word,
        pub sh_flags: Elf64_Xword,
        pub sh_addr: Elf64_Addr,
        pub sh_offset: Elf64_Off,
        pub sh_size: Elf64_Xword,
        pub sh_link: Elf64_Word,
        pub sh_info: Elf64_Word,
        pub sh_addralign: Elf64_Xword,
        pub sh_entsize: Elf64_Xword,
    }

    pub struct __c_anonymous_elf32_rel {
        pub r_offset: Elf32_Addr,
        pub r_info: Elf32_Word,
    }

    pub struct __c_anonymous_elf64_rel {
        pub r_offset: Elf64_Addr,
        pub r_info: Elf64_Xword,
    }

    pub struct __c_anonymous__kernel_fsid_t {
        pub val: [c_int; 2],
    }

    pub struct ucred {
        pub pid: crate::pid_t,
        pub uid: crate::uid_t,
        pub gid: crate::gid_t,
    }

    pub struct mntent {
        pub mnt_fsname: *mut c_char,
        pub mnt_dir: *mut c_char,
        pub mnt_type: *mut c_char,
        pub mnt_opts: *mut c_char,
        pub mnt_freq: c_int,
        pub mnt_passno: c_int,
    }

    pub struct posix_spawn_file_actions_t {
        __allocated: c_int,
        __used: c_int,
        __actions: *mut c_int,
        __pad: [c_int; 16],
    }

    pub struct posix_spawnattr_t {
        __flags: c_short,
        __pgrp: crate::pid_t,
        __sd: crate::sigset_t,
        __ss: crate::sigset_t,
        #[cfg(any(target_env = "musl", target_env = "ohos"))]
        __prio: c_int,
        #[cfg(not(any(target_env = "musl", target_env = "ohos")))]
        __sp: crate::sched_param,
        __policy: c_int,
        __pad: [c_int; 16],
    }

    pub struct genlmsghdr {
        pub cmd: u8,
        pub version: u8,
        pub reserved: u16,
    }

    pub struct in6_pktinfo {
        pub ipi6_addr: crate::in6_addr,
        pub ipi6_ifindex: c_uint,
    }

    pub struct arpd_request {
        pub req: c_ushort,
        pub ip: u32,
        pub dev: c_ulong,
        pub stamp: c_ulong,
        pub updated: c_ulong,
        pub ha: [c_uchar; crate::MAX_ADDR_LEN],
    }

    pub struct inotify_event {
        pub wd: c_int,
        pub mask: u32,
        pub cookie: u32,
        pub len: u32,
    }

    pub struct fanotify_response {
        pub fd: c_int,
        pub response: __u32,
    }

    pub struct fanotify_event_info_header {
        pub info_type: __u8,
        pub pad: __u8,
        pub len: __u16,
    }

    pub struct fanotify_event_info_fid {
        pub hdr: fanotify_event_info_header,
        pub fsid: crate::__kernel_fsid_t,
        pub handle: [c_uchar; 0],
    }

    pub struct sockaddr_vm {
        pub svm_family: crate::sa_family_t,
        pub svm_reserved1: c_ushort,
        pub svm_port: c_uint,
        pub svm_cid: c_uint,
        pub svm_zero: [u8; 4],
    }

    pub struct regmatch_t {
        pub rm_so: regoff_t,
        pub rm_eo: regoff_t,
    }

    pub struct sock_extended_err {
        pub ee_errno: u32,
        pub ee_origin: u8,
        pub ee_type: u8,
        pub ee_code: u8,
        pub ee_pad: u8,
        pub ee_info: u32,
        pub ee_data: u32,
    }

    // linux/can.h
    pub struct __c_anonymous_sockaddr_can_tp {
        pub rx_id: canid_t,
        pub tx_id: canid_t,
    }

    pub struct __c_anonymous_sockaddr_can_j1939 {
        pub name: u64,
        pub pgn: u32,
        pub addr: u8,
    }

    pub struct can_filter {
        pub can_id: canid_t,
        pub can_mask: canid_t,
    }

    // linux/can/j1939.h
    pub struct j1939_filter {
        pub name: name_t,
        pub name_mask: name_t,
        pub pgn: pgn_t,
        pub pgn_mask: pgn_t,
        pub addr: u8,
        pub addr_mask: u8,
    }

    // linux/seccomp.h
    pub struct seccomp_data {
        pub nr: c_int,
        pub arch: __u32,
        pub instruction_pointer: crate::__u64,
        pub args: [crate::__u64; 6],
    }

    pub struct seccomp_notif_sizes {
        pub seccomp_notif: __u16,
        pub seccomp_notif_resp: __u16,
        pub seccomp_data: __u16,
    }

    pub struct seccomp_notif {
        pub id: crate::__u64,
        pub pid: __u32,
        pub flags: __u32,
        pub data: seccomp_data,
    }

    pub struct seccomp_notif_resp {
        pub id: crate::__u64,
        pub val: crate::__s64,
        pub error: __s32,
        pub flags: __u32,
    }

    pub struct seccomp_notif_addfd {
        pub id: crate::__u64,
        pub flags: __u32,
        pub srcfd: __u32,
        pub newfd: __u32,
        pub newfd_flags: __u32,
    }

    pub struct nlmsghdr {
        pub nlmsg_len: u32,
        pub nlmsg_type: u16,
        pub nlmsg_flags: u16,
        pub nlmsg_seq: u32,
        pub nlmsg_pid: u32,
    }

    pub struct nlmsgerr {
        pub error: c_int,
        pub msg: nlmsghdr,
    }

    pub struct nlattr {
        pub nla_len: u16,
        pub nla_type: u16,
    }

    pub struct __c_anonymous_ifru_map {
        pub mem_start: c_ulong,
        pub mem_end: c_ulong,
        pub base_addr: c_ushort,
        pub irq: c_uchar,
        pub dma: c_uchar,
        pub port: c_uchar,
    }

    pub struct in6_ifreq {
        pub ifr6_addr: crate::in6_addr,
        pub ifr6_prefixlen: u32,
        pub ifr6_ifindex: c_int,
    }

    pub struct option {
        pub name: *const c_char,
        pub has_arg: c_int,
        pub flag: *mut c_int,
        pub val: c_int,
    }

    // linux/openat2.h
    #[non_exhaustive]
    pub struct open_how {
        pub flags: crate::__u64,
        pub mode: crate::__u64,
        pub resolve: crate::__u64,
    }

    // linux/ptp_clock.h
    pub struct ptp_clock_time {
        pub sec: crate::__s64,
        pub nsec: __u32,
        pub reserved: __u32,
    }

    pub struct ptp_extts_request {
        pub index: c_uint,
        pub flags: c_uint,
        pub rsv: [c_uint; 2],
    }

    pub struct ptp_sys_offset_extended {
        pub n_samples: c_uint,
        pub clockid: __kernel_clockid_t,
        pub rsv: [c_uint; 2],
        pub ts: [[ptp_clock_time; 3]; PTP_MAX_SAMPLES as usize],
    }

    pub struct ptp_sys_offset_precise {
        pub device: ptp_clock_time,
        pub sys_realtime: ptp_clock_time,
        pub sys_monoraw: ptp_clock_time,
        pub rsv: [c_uint; 4],
    }

    pub struct ptp_extts_event {
        pub t: ptp_clock_time,
        index: c_uint,
        flags: c_uint,
        rsv: [c_uint; 2],
    }

    // linux/sctp.h

    pub struct sctp_initmsg {
        pub sinit_num_ostreams: __u16,
        pub sinit_max_instreams: __u16,
        pub sinit_max_attempts: __u16,
        pub sinit_max_init_timeo: __u16,
    }

    pub struct sctp_sndrcvinfo {
        pub sinfo_stream: __u16,
        pub sinfo_ssn: __u16,
        pub sinfo_flags: __u16,
        pub sinfo_ppid: __u32,
        pub sinfo_context: __u32,
        pub sinfo_timetolive: __u32,
        pub sinfo_tsn: __u32,
        pub sinfo_cumtsn: __u32,
        pub sinfo_assoc_id: crate::sctp_assoc_t,
    }

    pub struct sctp_sndinfo {
        pub snd_sid: __u16,
        pub snd_flags: __u16,
        pub snd_ppid: __u32,
        pub snd_context: __u32,
        pub snd_assoc_id: crate::sctp_assoc_t,
    }

    pub struct sctp_rcvinfo {
        pub rcv_sid: __u16,
        pub rcv_ssn: __u16,
        pub rcv_flags: __u16,
        pub rcv_ppid: __u32,
        pub rcv_tsn: __u32,
        pub rcv_cumtsn: __u32,
        pub rcv_context: __u32,
        pub rcv_assoc_id: crate::sctp_assoc_t,
    }

    pub struct sctp_nxtinfo {
        pub nxt_sid: __u16,
        pub nxt_flags: __u16,
        pub nxt_ppid: __u32,
        pub nxt_length: __u32,
        pub nxt_assoc_id: crate::sctp_assoc_t,
    }

    pub struct sctp_prinfo {
        pub pr_policy: __u16,
        pub pr_value: __u32,
    }

    pub struct sctp_authinfo {
        pub auth_keynumber: __u16,
    }

    pub struct rlimit64 {
        pub rlim_cur: rlim64_t,
        pub rlim_max: rlim64_t,
    }

    // linux/tls.h

    pub struct tls_crypto_info {
        pub version: __u16,
        pub cipher_type: __u16,
    }

    pub struct tls12_crypto_info_aes_gcm_128 {
        pub info: tls_crypto_info,
        pub iv: [c_uchar; TLS_CIPHER_AES_GCM_128_IV_SIZE],
        pub key: [c_uchar; TLS_CIPHER_AES_GCM_128_KEY_SIZE],
        pub salt: [c_uchar; TLS_CIPHER_AES_GCM_128_SALT_SIZE],
        pub rec_seq: [c_uchar; TLS_CIPHER_AES_GCM_128_REC_SEQ_SIZE],
    }

    pub struct tls12_crypto_info_aes_gcm_256 {
        pub info: tls_crypto_info,
        pub iv: [c_uchar; TLS_CIPHER_AES_GCM_256_IV_SIZE],
        pub key: [c_uchar; TLS_CIPHER_AES_GCM_256_KEY_SIZE],
        pub salt: [c_uchar; TLS_CIPHER_AES_GCM_256_SALT_SIZE],
        pub rec_seq: [c_uchar; TLS_CIPHER_AES_GCM_256_REC_SEQ_SIZE],
    }

    pub struct tls12_crypto_info_aes_ccm_128 {
        pub info: tls_crypto_info,
        pub iv: [c_uchar; TLS_CIPHER_AES_CCM_128_IV_SIZE],
        pub key: [c_uchar; TLS_CIPHER_AES_CCM_128_KEY_SIZE],
        pub salt: [c_uchar; TLS_CIPHER_AES_CCM_128_SALT_SIZE],
        pub rec_seq: [c_uchar; TLS_CIPHER_AES_CCM_128_REC_SEQ_SIZE],
    }

    pub struct tls12_crypto_info_chacha20_poly1305 {
        pub info: tls_crypto_info,
        pub iv: [c_uchar; TLS_CIPHER_CHACHA20_POLY1305_IV_SIZE],
        pub key: [c_uchar; TLS_CIPHER_CHACHA20_POLY1305_KEY_SIZE],
        pub salt: [c_uchar; TLS_CIPHER_CHACHA20_POLY1305_SALT_SIZE],
        pub rec_seq: [c_uchar; TLS_CIPHER_CHACHA20_POLY1305_REC_SEQ_SIZE],
    }

    pub struct tls12_crypto_info_sm4_gcm {
        pub info: tls_crypto_info,
        pub iv: [c_uchar; TLS_CIPHER_SM4_GCM_IV_SIZE],
        pub key: [c_uchar; TLS_CIPHER_SM4_GCM_KEY_SIZE],
        pub salt: [c_uchar; TLS_CIPHER_SM4_GCM_SALT_SIZE],
        pub rec_seq: [c_uchar; TLS_CIPHER_SM4_GCM_REC_SEQ_SIZE],
    }

    pub struct tls12_crypto_info_sm4_ccm {
        pub info: tls_crypto_info,
        pub iv: [c_uchar; TLS_CIPHER_SM4_CCM_IV_SIZE],
        pub key: [c_uchar; TLS_CIPHER_SM4_CCM_KEY_SIZE],
        pub salt: [c_uchar; TLS_CIPHER_SM4_CCM_SALT_SIZE],
        pub rec_seq: [c_uchar; TLS_CIPHER_SM4_CCM_REC_SEQ_SIZE],
    }

    pub struct tls12_crypto_info_aria_gcm_128 {
        pub info: tls_crypto_info,
        pub iv: [c_uchar; TLS_CIPHER_ARIA_GCM_128_IV_SIZE],
        pub key: [c_uchar; TLS_CIPHER_ARIA_GCM_128_KEY_SIZE],
        pub salt: [c_uchar; TLS_CIPHER_ARIA_GCM_128_SALT_SIZE],
        pub rec_seq: [c_uchar; TLS_CIPHER_ARIA_GCM_128_REC_SEQ_SIZE],
    }

    pub struct tls12_crypto_info_aria_gcm_256 {
        pub info: tls_crypto_info,
        pub iv: [c_uchar; TLS_CIPHER_ARIA_GCM_256_IV_SIZE],
        pub key: [c_uchar; TLS_CIPHER_ARIA_GCM_256_KEY_SIZE],
        pub salt: [c_uchar; TLS_CIPHER_ARIA_GCM_256_SALT_SIZE],
        pub rec_seq: [c_uchar; TLS_CIPHER_ARIA_GCM_256_REC_SEQ_SIZE],
    }

    // linux/wireless.h

    pub struct iw_param {
        pub value: __s32,
        pub fixed: __u8,
        pub disabled: __u8,
        pub flags: __u16,
    }

    pub struct iw_point {
        pub pointer: *mut c_void,
        pub length: __u16,
        pub flags: __u16,
    }

    pub struct iw_freq {
        pub m: __s32,
        pub e: __s16,
        pub i: __u8,
        pub flags: __u8,
    }

    pub struct iw_quality {
        pub qual: __u8,
        pub level: __u8,
        pub noise: __u8,
        pub updated: __u8,
    }

    pub struct iw_discarded {
        pub nwid: __u32,
        pub code: __u32,
        pub fragment: __u32,
        pub retries: __u32,
        pubmisc: __u32,
    }

    pub struct iw_missed {
        pub beacon: __u32,
    }

    pub struct iw_scan_req {
        pub scan_type: __u8,
        pub essid_len: __u8,
        pub num_channels: __u8,
        pub flags: __u8,
        pub bssid: crate::sockaddr,
        pub essid: [__u8; IW_ESSID_MAX_SIZE],
        pub min_channel_time: __u32,
        pub max_channel_time: __u32,
        pub channel_list: [iw_freq; IW_MAX_FREQUENCIES],
    }

    pub struct iw_encode_ext {
        pub ext_flags: __u32,
        pub tx_seq: [__u8; IW_ENCODE_SEQ_MAX_SIZE],
        pub rx_seq: [__u8; IW_ENCODE_SEQ_MAX_SIZE],
        pub addr: crate::sockaddr,
        pub alg: __u16,
        pub key_len: __u16,
        pub key: [__u8; 0],
    }

    pub struct iw_pmksa {
        pub cmd: __u32,
        pub bssid: crate::sockaddr,
        pub pmkid: [__u8; IW_PMKID_LEN],
    }

    pub struct iw_pmkid_cand {
        pub flags: __u32,
        pub index: __u32,
        pub bssid: crate::sockaddr,
    }

    pub struct iw_statistics {
        pub status: __u16,
        pub qual: iw_quality,
        pub discard: iw_discarded,
        pub miss: iw_missed,
    }

    pub struct iw_range {
        pub throughput: __u32,
        pub min_nwid: __u32,
        pub max_nwid: __u32,
        pub old_num_channels: __u16,
        pub old_num_frequency: __u8,
        pub scan_capa: __u8,
        pub event_capa: [__u32; 6],
        pub sensitivity: __s32,
        pub max_qual: iw_quality,
        pub avg_qual: iw_quality,
        pub num_bitrates: __u8,
        pub bitrate: [__s32; IW_MAX_BITRATES],
        pub min_rts: __s32,
        pub max_rts: __s32,
        pub min_frag: __s32,
        pub max_frag: __s32,
        pub min_pmp: __s32,
        pub max_pmp: __s32,
        pub min_pmt: __s32,
        pub max_pmt: __s32,
        pub pmp_flags: __u16,
        pub pmt_flags: __u16,
        pub pm_capa: __u16,
        pub encoding_size: [__u16; IW_MAX_ENCODING_SIZES],
        pub num_encoding_sizes: __u8,
        pub max_encoding_tokens: __u8,
        pub encoding_login_index: __u8,
        pub txpower_capa: __u16,
        pub num_txpower: __u8,
        pub txpower: [__s32; IW_MAX_TXPOWER],
        pub we_version_compiled: __u8,
        pub we_version_source: __u8,
        pub retry_capa: __u16,
        pub retry_flags: __u16,
        pub r_time_flags: __u16,
        pub min_retry: __s32,
        pub max_retry: __s32,
        pub min_r_time: __s32,
        pub max_r_time: __s32,
        pub num_channels: __u16,
        pub num_frequency: __u8,
        pub freq: [iw_freq; IW_MAX_FREQUENCIES],
        pub enc_capa: __u32,
    }

    pub struct iw_priv_args {
        pub cmd: __u32,
        pub set_args: __u16,
        pub get_args: __u16,
        pub name: [c_char; crate::IFNAMSIZ],
    }

    // #include <linux/eventpoll.h>

    pub struct epoll_params {
        pub busy_poll_usecs: u32,
        pub busy_poll_budget: u16,
        pub prefer_busy_poll: u8,
        pub __pad: u8, // Must be zero
    }

    #[cfg_attr(
        any(
            target_pointer_width = "32",
            target_arch = "x86_64",
            target_arch = "powerpc64",
            target_arch = "mips64",
            target_arch = "mips64r6",
            target_arch = "s390x",
            target_arch = "sparc64",
            target_arch = "aarch64",
            target_arch = "riscv64",
            target_arch = "riscv32",
            target_arch = "loongarch64"
        ),
        repr(align(4))
    )]
    #[cfg_attr(
        not(any(
            target_pointer_width = "32",
            target_arch = "x86_64",
            target_arch = "powerpc64",
            target_arch = "mips64",
            target_arch = "mips64r6",
            target_arch = "s390x",
            target_arch = "sparc64",
            target_arch = "aarch64",
            target_arch = "riscv64",
            target_arch = "riscv32",
            target_arch = "loongarch64"
        )),
        repr(align(8))
    )]
    pub struct pthread_mutexattr_t {
        #[doc(hidden)]
        size: [u8; crate::__SIZEOF_PTHREAD_MUTEXATTR_T],
    }

    #[cfg_attr(
        any(target_env = "musl", target_env = "ohos", target_pointer_width = "32"),
        repr(align(4))
    )]
    #[cfg_attr(
        all(
            not(target_env = "musl"),
            not(target_env = "ohos"),
            target_pointer_width = "64"
        ),
        repr(align(8))
    )]
    pub struct pthread_rwlockattr_t {
        #[doc(hidden)]
        size: [u8; crate::__SIZEOF_PTHREAD_RWLOCKATTR_T],
    }

    #[repr(align(4))]
    pub struct pthread_condattr_t {
        #[doc(hidden)]
        size: [u8; crate::__SIZEOF_PTHREAD_CONDATTR_T],
    }

    #[repr(align(4))]
    pub struct pthread_barrierattr_t {
        #[doc(hidden)]
        size: [u8; crate::__SIZEOF_PTHREAD_BARRIERATTR_T],
    }

    #[repr(align(8))]
    pub struct fanotify_event_metadata {
        pub event_len: __u32,
        pub vers: __u8,
        pub reserved: __u8,
        pub metadata_len: __u16,
        pub mask: __u64,
        pub fd: c_int,
        pub pid: c_int,
    }

    // linux/ptp_clock.h

    pub struct ptp_sys_offset {
        pub n_samples: c_uint,
        pub rsv: [c_uint; 3],
        // FIXME(garando): replace length with `2 * PTP_MAX_SAMPLES + 1` when supported
        pub ts: [ptp_clock_time; 51],
    }

    pub struct ptp_pin_desc {
        pub name: [c_char; 64],
        pub index: c_uint,
        pub func: c_uint,
        pub chan: c_uint,
        pub rsv: [c_uint; 5],
    }

    pub struct ptp_clock_caps {
        pub max_adj: c_int,
        pub n_alarm: c_int,
        pub n_ext_ts: c_int,
        pub n_per_out: c_int,
        pub pps: c_int,
        pub n_pins: c_int,
        pub cross_timestamping: c_int,
        pub adjust_phase: c_int,
        pub max_phase_adj: c_int,
        pub rsv: [c_int; 11],
    }

    // linux/if_xdp.h

    pub struct sockaddr_xdp {
        pub sxdp_family: crate::__u16,
        pub sxdp_flags: crate::__u16,
        pub sxdp_ifindex: crate::__u32,
        pub sxdp_queue_id: crate::__u32,
        pub sxdp_shared_umem_fd: crate::__u32,
    }

    pub struct xdp_ring_offset {
        pub producer: crate::__u64,
        pub consumer: crate::__u64,
        pub desc: crate::__u64,
        pub flags: crate::__u64,
    }

    pub struct xdp_mmap_offsets {
        pub rx: xdp_ring_offset,
        pub tx: xdp_ring_offset,
        pub fr: xdp_ring_offset,
        pub cr: xdp_ring_offset,
    }

    pub struct xdp_ring_offset_v1 {
        pub producer: crate::__u64,
        pub consumer: crate::__u64,
        pub desc: crate::__u64,
    }

    pub struct xdp_mmap_offsets_v1 {
        pub rx: xdp_ring_offset_v1,
        pub tx: xdp_ring_offset_v1,
        pub fr: xdp_ring_offset_v1,
        pub cr: xdp_ring_offset_v1,
    }

    pub struct xdp_umem_reg {
        pub addr: crate::__u64,
        pub len: crate::__u64,
        pub chunk_size: crate::__u32,
        pub headroom: crate::__u32,
        pub flags: crate::__u32,
        pub tx_metadata_len: crate::__u32,
    }

    pub struct xdp_umem_reg_v1 {
        pub addr: crate::__u64,
        pub len: crate::__u64,
        pub chunk_size: crate::__u32,
        pub headroom: crate::__u32,
    }

    pub struct xdp_statistics {
        pub rx_dropped: crate::__u64,
        pub rx_invalid_descs: crate::__u64,
        pub tx_invalid_descs: crate::__u64,
        pub rx_ring_full: crate::__u64,
        pub rx_fill_ring_empty_descs: crate::__u64,
        pub tx_ring_empty_descs: crate::__u64,
    }

    pub struct xdp_statistics_v1 {
        pub rx_dropped: crate::__u64,
        pub rx_invalid_descs: crate::__u64,
        pub tx_invalid_descs: crate::__u64,
    }

    pub struct xdp_options {
        pub flags: crate::__u32,
    }

    pub struct xdp_desc {
        pub addr: crate::__u64,
        pub len: crate::__u32,
        pub options: crate::__u32,
    }

    pub struct xsk_tx_metadata_completion {
        pub tx_timestamp: crate::__u64,
    }

    pub struct xsk_tx_metadata_request {
        pub csum_start: __u16,
        pub csum_offset: __u16,
    }

    // linux/mount.h

    pub struct mount_attr {
        pub attr_set: crate::__u64,
        pub attr_clr: crate::__u64,
        pub propagation: crate::__u64,
        pub userns_fd: crate::__u64,
    }

    // linux/nsfs.h
    pub struct mnt_ns_info {
        pub size: crate::__u32,
        pub nr_mounts: crate::__u32,
        pub mnt_ns_id: crate::__u64,
    }

    // linux/pidfd.h

    #[non_exhaustive]
    pub struct pidfd_info {
        pub mask: crate::__u64,
        pub cgroupid: crate::__u64,
        pub pid: crate::__u32,
        pub tgid: crate::__u32,
        pub ppid: crate::__u32,
        pub ruid: crate::__u32,
        pub rgid: crate::__u32,
        pub euid: crate::__u32,
        pub egid: crate::__u32,
        pub suid: crate::__u32,
        pub sgid: crate::__u32,
        pub fsuid: crate::__u32,
        pub fsgid: crate::__u32,
        pub exit_code: crate::__s32,
    }

    // linux/uio.h

    pub struct dmabuf_cmsg {
        pub frag_offset: crate::__u64,
        pub frag_size: crate::__u32,
        pub frag_token: crate::__u32,
        pub dmabuf_id: crate::__u32,
        pub flags: crate::__u32,
    }

    pub struct dmabuf_token {
        pub token_start: crate::__u32,
        pub token_count: crate::__u32,
    }
}

cfg_if! {
    if #[cfg(not(target_arch = "sparc64"))] {
        s! {
            pub struct iw_thrspy {
                pub addr: crate::sockaddr,
                pub qual: iw_quality,
                pub low: iw_quality,
                pub high: iw_quality,
            }

            pub struct iw_mlme {
                pub cmd: __u16,
                pub reason_code: __u16,
                pub addr: crate::sockaddr,
            }

            pub struct iw_michaelmicfailure {
                pub flags: __u32,
                pub src_addr: crate::sockaddr,
                pub tsc: [__u8; IW_ENCODE_SEQ_MAX_SIZE],
            }

            pub struct __c_anonymous_elf32_rela {
                pub r_offset: Elf32_Addr,
                pub r_info: Elf32_Word,
                pub r_addend: Elf32_Sword,
            }

            pub struct __c_anonymous_elf64_rela {
                pub r_offset: Elf64_Addr,
                pub r_info: Elf64_Xword,
                pub r_addend: Elf64_Sxword,
            }
        }
    }
}

s_no_extra_traits! {
    pub struct sockaddr_nl {
        pub nl_family: crate::sa_family_t,
        nl_pad: c_ushort,
        pub nl_pid: u32,
        pub nl_groups: u32,
    }

    pub struct dirent {
        pub d_ino: crate::ino_t,
        pub d_off: off_t,
        pub d_reclen: c_ushort,
        pub d_type: c_uchar,
        pub d_name: [c_char; 256],
    }

    pub struct sockaddr_alg {
        pub salg_family: crate::sa_family_t,
        pub salg_type: [c_uchar; 14],
        pub salg_feat: u32,
        pub salg_mask: u32,
        pub salg_name: [c_uchar; 64],
    }

    pub struct uinput_setup {
        pub id: input_id,
        pub name: [c_char; UINPUT_MAX_NAME_SIZE],
        pub ff_effects_max: __u32,
    }

    pub struct uinput_user_dev {
        pub name: [c_char; UINPUT_MAX_NAME_SIZE],
        pub id: input_id,
        pub ff_effects_max: __u32,
        pub absmax: [__s32; ABS_CNT],
        pub absmin: [__s32; ABS_CNT],
        pub absfuzz: [__s32; ABS_CNT],
        pub absflat: [__s32; ABS_CNT],
    }

    /// WARNING: The `PartialEq`, `Eq` and `Hash` implementations of this
    /// type are unsound and will be removed in the future.
    #[deprecated(
        note = "this struct has unsafe trait implementations that will be \
                removed in the future",
        since = "0.2.80"
    )]
    pub struct af_alg_iv {
        pub ivlen: u32,
        pub iv: [c_uchar; 0],
    }

    // x32 compatibility
    // See https://sourceware.org/bugzilla/show_bug.cgi?id=21279
    pub struct mq_attr {
        #[cfg(all(target_arch = "x86_64", target_pointer_width = "32"))]
        pub mq_flags: i64,
        #[cfg(all(target_arch = "x86_64", target_pointer_width = "32"))]
        pub mq_maxmsg: i64,
        #[cfg(all(target_arch = "x86_64", target_pointer_width = "32"))]
        pub mq_msgsize: i64,
        #[cfg(all(target_arch = "x86_64", target_pointer_width = "32"))]
        pub mq_curmsgs: i64,
        #[cfg(all(target_arch = "x86_64", target_pointer_width = "32"))]
        pad: [i64; 4],

        #[cfg(not(all(target_arch = "x86_64", target_pointer_width = "32")))]
        pub mq_flags: c_long,
        #[cfg(not(all(target_arch = "x86_64", target_pointer_width = "32")))]
        pub mq_maxmsg: c_long,
        #[cfg(not(all(target_arch = "x86_64", target_pointer_width = "32")))]
        pub mq_msgsize: c_long,
        #[cfg(not(all(target_arch = "x86_64", target_pointer_width = "32")))]
        pub mq_curmsgs: c_long,
        #[cfg(not(all(target_arch = "x86_64", target_pointer_width = "32")))]
        pad: [c_long; 4],
    }

    pub union __c_anonymous_ifr_ifru {
        pub ifru_addr: crate::sockaddr,
        pub ifru_dstaddr: crate::sockaddr,
        pub ifru_broadaddr: crate::sockaddr,
        pub ifru_netmask: crate::sockaddr,
        pub ifru_hwaddr: crate::sockaddr,
        pub ifru_flags: c_short,
        pub ifru_ifindex: c_int,
        pub ifru_metric: c_int,
        pub ifru_mtu: c_int,
        pub ifru_map: __c_anonymous_ifru_map,
        pub ifru_slave: [c_char; crate::IFNAMSIZ],
        pub ifru_newname: [c_char; crate::IFNAMSIZ],
        pub ifru_data: *mut c_char,
    }

    pub struct ifreq {
        /// interface name, e.g. "en0"
        pub ifr_name: [c_char; crate::IFNAMSIZ],
        pub ifr_ifru: __c_anonymous_ifr_ifru,
    }

    pub union __c_anonymous_ifc_ifcu {
        pub ifcu_buf: *mut c_char,
        pub ifcu_req: *mut crate::ifreq,
    }

    /// Structure used in SIOCGIFCONF request.  Used to retrieve interface configuration for
    /// machine (useful for programs which must know all networks accessible).
    pub struct ifconf {
        /// Size of buffer
        pub ifc_len: c_int,
        pub ifc_ifcu: __c_anonymous_ifc_ifcu,
    }

    pub struct hwtstamp_config {
        pub flags: c_int,
        pub tx_type: c_int,
        pub rx_filter: c_int,
    }

    pub struct dirent64 {
        pub d_ino: crate::ino64_t,
        pub d_off: off64_t,
        pub d_reclen: c_ushort,
        pub d_type: c_uchar,
        pub d_name: [c_char; 256],
    }

    pub struct sched_attr {
        pub size: __u32,
        pub sched_policy: __u32,
        pub sched_flags: crate::__u64,
        pub sched_nice: __s32,
        pub sched_priority: __u32,
        pub sched_runtime: crate::__u64,
        pub sched_deadline: crate::__u64,
        pub sched_period: crate::__u64,
    }

    #[allow(missing_debug_implementations)]
    pub union tpacket_req_u {
        pub req: crate::tpacket_req,
        pub req3: crate::tpacket_req3,
    }

    #[allow(missing_debug_implementations)]
    pub union tpacket_bd_header_u {
        pub bh1: crate::tpacket_hdr_v1,
    }

    #[allow(missing_debug_implementations)]
    pub struct tpacket_block_desc {
        pub version: __u32,
        pub offset_to_priv: __u32,
        pub hdr: crate::tpacket_bd_header_u,
    }

    #[cfg_attr(
        all(
            any(target_env = "musl", target_env = "ohos"),
            target_pointer_width = "32"
        ),
        repr(align(4))
    )]
    #[cfg_attr(
        all(
            any(target_env = "musl", target_env = "ohos"),
            target_pointer_width = "64"
        ),
        repr(align(8))
    )]
    #[cfg_attr(
        all(
            not(any(target_env = "musl", target_env = "ohos")),
            target_arch = "x86"
        ),
        repr(align(4))
    )]
    #[cfg_attr(
        all(
            not(any(target_env = "musl", target_env = "ohos")),
            not(target_arch = "x86")
        ),
        repr(align(8))
    )]
    pub struct pthread_cond_t {
        #[doc(hidden)]
        size: [u8; crate::__SIZEOF_PTHREAD_COND_T],
    }

    #[cfg_attr(
        all(
            target_pointer_width = "32",
            any(
                target_arch = "mips",
                target_arch = "mips32r6",
                target_arch = "arm",
                target_arch = "hexagon",
                target_arch = "m68k",
                target_arch = "csky",
                target_arch = "powerpc",
                target_arch = "sparc",
                target_arch = "x86_64",
                target_arch = "x86"
            )
        ),
        repr(align(4))
    )]
    #[cfg_attr(
        any(
            target_pointer_width = "64",
            not(any(
                target_arch = "mips",
                target_arch = "mips32r6",
                target_arch = "arm",
                target_arch = "hexagon",
                target_arch = "m68k",
                target_arch = "csky",
                target_arch = "powerpc",
                target_arch = "sparc",
                target_arch = "x86_64",
                target_arch = "x86"
            ))
        ),
        repr(align(8))
    )]
    pub struct pthread_mutex_t {
        #[doc(hidden)]
        size: [u8; crate::__SIZEOF_PTHREAD_MUTEX_T],
    }

    #[cfg_attr(
        all(
            target_pointer_width = "32",
            any(
                target_arch = "mips",
                target_arch = "mips32r6",
                target_arch = "arm",
                target_arch = "hexagon",
                target_arch = "m68k",
                target_arch = "csky",
                target_arch = "powerpc",
                target_arch = "sparc",
                target_arch = "x86_64",
                target_arch = "x86"
            )
        ),
        repr(align(4))
    )]
    #[cfg_attr(
        any(
            target_pointer_width = "64",
            not(any(
                target_arch = "mips",
                target_arch = "mips32r6",
                target_arch = "arm",
                target_arch = "hexagon",
                target_arch = "m68k",
                target_arch = "powerpc",
                target_arch = "sparc",
                target_arch = "x86_64",
                target_arch = "x86"
            ))
        ),
        repr(align(8))
    )]
    pub struct pthread_rwlock_t {
        size: [u8; crate::__SIZEOF_PTHREAD_RWLOCK_T],
    }

    #[cfg_attr(
        all(
            target_pointer_width = "32",
            any(
                target_arch = "mips",
                target_arch = "mips32r6",
                target_arch = "arm",
                target_arch = "hexagon",
                target_arch = "m68k",
                target_arch = "csky",
                target_arch = "powerpc",
                target_arch = "sparc",
                target_arch = "x86_64",
                target_arch = "x86"
            )
        ),
        repr(align(4))
    )]
    #[cfg_attr(
        any(
            target_pointer_width = "64",
            not(any(
                target_arch = "mips",
                target_arch = "mips32r6",
                target_arch = "arm",
                target_arch = "hexagon",
                target_arch = "m68k",
                target_arch = "csky",
                target_arch = "powerpc",
                target_arch = "sparc",
                target_arch = "x86_64",
                target_arch = "x86"
            ))
        ),
        repr(align(8))
    )]
    pub struct pthread_barrier_t {
        size: [u8; crate::__SIZEOF_PTHREAD_BARRIER_T],
    }

    // linux/net_tstamp.h
    #[allow(missing_debug_implementations)]
    pub struct sock_txtime {
        pub clockid: crate::clockid_t,
        pub flags: __u32,
    }

    // linux/can.h
    #[repr(align(8))]
    #[allow(missing_debug_implementations)]
    pub struct can_frame {
        pub can_id: canid_t,
        // FIXME(1.0): this field was renamed to `len` in Linux 5.11
        pub can_dlc: u8,
        __pad: u8,
        __res0: u8,
        pub len8_dlc: u8,
        pub data: [u8; CAN_MAX_DLEN],
    }

    #[repr(align(8))]
    #[allow(missing_debug_implementations)]
    pub struct canfd_frame {
        pub can_id: canid_t,
        pub len: u8,
        pub flags: u8,
        __res0: u8,
        __res1: u8,
        pub data: [u8; CANFD_MAX_DLEN],
    }

    #[repr(align(8))]
    #[allow(missing_debug_implementations)]
    pub struct canxl_frame {
        pub prio: canid_t,
        pub flags: u8,
        pub sdt: u8,
        pub len: u16,
        pub af: u32,
        pub data: [u8; CANXL_MAX_DLEN],
    }

    #[allow(missing_debug_implementations)]
    pub union __c_anonymous_sockaddr_can_can_addr {
        pub tp: __c_anonymous_sockaddr_can_tp,
        pub j1939: __c_anonymous_sockaddr_can_j1939,
    }

    #[allow(missing_debug_implementations)]
    pub struct sockaddr_can {
        pub can_family: crate::sa_family_t,
        pub can_ifindex: c_int,
        pub can_addr: __c_anonymous_sockaddr_can_can_addr,
    }

    // linux/wireless.h
    pub union iwreq_data {
        pub name: [c_char; crate::IFNAMSIZ],
        pub essid: iw_point,
        pub nwid: iw_param,
        pub freq: iw_freq,
        pub sens: iw_param,
        pub bitrate: iw_param,
        pub txpower: iw_param,
        pub rts: iw_param,
        pub frag: iw_param,
        pub mode: __u32,
        pub retry: iw_param,
        pub encoding: iw_point,
        pub power: iw_param,
        pub qual: iw_quality,
        pub ap_addr: crate::sockaddr,
        pub addr: crate::sockaddr,
        pub param: iw_param,
        pub data: iw_point,
    }

    pub struct iw_event {
        pub len: __u16,
        pub cmd: __u16,
        pub u: iwreq_data,
    }

    pub union __c_anonymous_iwreq {
        pub ifrn_name: [c_char; crate::IFNAMSIZ],
    }

    pub struct iwreq {
        pub ifr_ifrn: __c_anonymous_iwreq,
        pub u: iwreq_data,
    }

    // linux/ptp_clock.h
    pub union __c_anonymous_ptp_perout_request_1 {
        pub start: ptp_clock_time,
        pub phase: ptp_clock_time,
    }

    pub union __c_anonymous_ptp_perout_request_2 {
        pub on: ptp_clock_time,
        pub rsv: [c_uint; 4],
    }

    #[allow(missing_debug_implementations)]
    pub struct ptp_perout_request {
        pub anonymous_1: __c_anonymous_ptp_perout_request_1,
        pub period: ptp_clock_time,
        pub index: c_uint,
        pub flags: c_uint,
        pub anonymous_2: __c_anonymous_ptp_perout_request_2,
    }

    // linux/if_xdp.h
    #[allow(missing_debug_implementations)]
    pub struct xsk_tx_metadata {
        pub flags: crate::__u64,
        pub xsk_tx_metadata_union: __c_anonymous_xsk_tx_metadata_union,
    }

    pub union __c_anonymous_xsk_tx_metadata_union {
        pub request: xsk_tx_metadata_request,
        pub completion: xsk_tx_metadata_completion,
    }
}

cfg_if! {
    if #[cfg(feature = "extra_traits")] {
        impl PartialEq for sockaddr_nl {
            fn eq(&self, other: &sockaddr_nl) -> bool {
                self.nl_family == other.nl_family
                    && self.nl_pid == other.nl_pid
                    && self.nl_groups == other.nl_groups
            }
        }
        impl Eq for sockaddr_nl {}
        impl hash::Hash for sockaddr_nl {
            fn hash<H: hash::Hasher>(&self, state: &mut H) {
                self.nl_family.hash(state);
                self.nl_pid.hash(state);
                self.nl_groups.hash(state);
            }
        }

        impl PartialEq for dirent {
            fn eq(&self, other: &dirent) -> bool {
                self.d_ino == other.d_ino
                    && self.d_off == other.d_off
                    && self.d_reclen == other.d_reclen
                    && self.d_type == other.d_type
                    && self
                        .d_name
                        .iter()
                        .zip(other.d_name.iter())
                        .all(|(a, b)| a == b)
            }
        }

        impl Eq for dirent {}

        impl hash::Hash for dirent {
            fn hash<H: hash::Hasher>(&self, state: &mut H) {
                self.d_ino.hash(state);
                self.d_off.hash(state);
                self.d_reclen.hash(state);
                self.d_type.hash(state);
                self.d_name.hash(state);
            }
        }

        impl PartialEq for dirent64 {
            fn eq(&self, other: &dirent64) -> bool {
                self.d_ino == other.d_ino
                    && self.d_off == other.d_off
                    && self.d_reclen == other.d_reclen
                    && self.d_type == other.d_type
                    && self
                        .d_name
                        .iter()
                        .zip(other.d_name.iter())
                        .all(|(a, b)| a == b)
            }
        }

        impl Eq for dirent64 {}

        impl hash::Hash for dirent64 {
            fn hash<H: hash::Hasher>(&self, state: &mut H) {
                self.d_ino.hash(state);
                self.d_off.hash(state);
                self.d_reclen.hash(state);
                self.d_type.hash(state);
                self.d_name.hash(state);
            }
        }

        impl PartialEq for pthread_cond_t {
            fn eq(&self, other: &pthread_cond_t) -> bool {
                self.size.iter().zip(other.size.iter()).all(|(a, b)| a == b)
            }
        }

        impl Eq for pthread_cond_t {}

        impl hash::Hash for pthread_cond_t {
            fn hash<H: hash::Hasher>(&self, state: &mut H) {
                self.size.hash(state);
            }
        }

        impl PartialEq for pthread_mutex_t {
            fn eq(&self, other: &pthread_mutex_t) -> bool {
                self.size.iter().zip(other.size.iter()).all(|(a, b)| a == b)
            }
        }

        impl Eq for pthread_mutex_t {}

        impl hash::Hash for pthread_mutex_t {
            fn hash<H: hash::Hasher>(&self, state: &mut H) {
                self.size.hash(state);
            }
        }

        impl PartialEq for pthread_rwlock_t {
            fn eq(&self, other: &pthread_rwlock_t) -> bool {
                self.size.iter().zip(other.size.iter()).all(|(a, b)| a == b)
            }
        }

        impl Eq for pthread_rwlock_t {}

        impl hash::Hash for pthread_rwlock_t {
            fn hash<H: hash::Hasher>(&self, state: &mut H) {
                self.size.hash(state);
            }
        }

        impl PartialEq for pthread_barrier_t {
            fn eq(&self, other: &pthread_barrier_t) -> bool {
                self.size.iter().zip(other.size.iter()).all(|(a, b)| a == b)
            }
        }

        impl Eq for pthread_barrier_t {}

        impl hash::Hash for pthread_barrier_t {
            fn hash<H: hash::Hasher>(&self, state: &mut H) {
                self.size.hash(state);
            }
        }

        impl PartialEq for sockaddr_alg {
            fn eq(&self, other: &sockaddr_alg) -> bool {
                self.salg_family == other.salg_family
                    && self
                        .salg_type
                        .iter()
                        .zip(other.salg_type.iter())
                        .all(|(a, b)| a == b)
                    && self.salg_feat == other.salg_feat
                    && self.salg_mask == other.salg_mask
                    && self
                        .salg_name
                        .iter()
                        .zip(other.salg_name.iter())
                        .all(|(a, b)| a == b)
            }
        }

        impl Eq for sockaddr_alg {}

        impl hash::Hash for sockaddr_alg {
            fn hash<H: hash::Hasher>(&self, state: &mut H) {
                self.salg_family.hash(state);
                self.salg_type.hash(state);
                self.salg_feat.hash(state);
                self.salg_mask.hash(state);
                self.salg_name.hash(state);
            }
        }

        impl PartialEq for uinput_setup {
            fn eq(&self, other: &uinput_setup) -> bool {
                self.id == other.id
                    && self.name[..] == other.name[..]
                    && self.ff_effects_max == other.ff_effects_max
            }
        }
        impl Eq for uinput_setup {}

        impl hash::Hash for uinput_setup {
            fn hash<H: hash::Hasher>(&self, state: &mut H) {
                self.id.hash(state);
                self.name.hash(state);
                self.ff_effects_max.hash(state);
            }
        }

        impl PartialEq for uinput_user_dev {
            fn eq(&self, other: &uinput_user_dev) -> bool {
                self.name[..] == other.name[..]
                    && self.id == other.id
                    && self.ff_effects_max == other.ff_effects_max
                    && self.absmax[..] == other.absmax[..]
                    && self.absmin[..] == other.absmin[..]
                    && self.absfuzz[..] == other.absfuzz[..]
                    && self.absflat[..] == other.absflat[..]
            }
        }
        impl Eq for uinput_user_dev {}

        impl hash::Hash for uinput_user_dev {
            fn hash<H: hash::Hasher>(&self, state: &mut H) {
                self.name.hash(state);
                self.id.hash(state);
                self.ff_effects_max.hash(state);
                self.absmax.hash(state);
                self.absmin.hash(state);
                self.absfuzz.hash(state);
                self.absflat.hash(state);
            }
        }

        #[allow(deprecated)]
        impl af_alg_iv {
            fn as_slice(&self) -> &[u8] {
                unsafe { ::core::slice::from_raw_parts(self.iv.as_ptr(), self.ivlen as usize) }
            }
        }

        #[allow(deprecated)]
        impl PartialEq for af_alg_iv {
            fn eq(&self, other: &af_alg_iv) -> bool {
                *self.as_slice() == *other.as_slice()
            }
        }

        #[allow(deprecated)]
        impl Eq for af_alg_iv {}

        #[allow(deprecated)]
        impl hash::Hash for af_alg_iv {
            fn hash<H: hash::Hasher>(&self, state: &mut H) {
                self.as_slice().hash(state);
            }
        }

        impl PartialEq for mq_attr {
            fn eq(&self, other: &mq_attr) -> bool {
                self.mq_flags == other.mq_flags
                    && self.mq_maxmsg == other.mq_maxmsg
                    && self.mq_msgsize == other.mq_msgsize
                    && self.mq_curmsgs == other.mq_curmsgs
            }
        }
        impl Eq for mq_attr {}
        impl hash::Hash for mq_attr {
            fn hash<H: hash::Hasher>(&self, state: &mut H) {
                self.mq_flags.hash(state);
                self.mq_maxmsg.hash(state);
                self.mq_msgsize.hash(state);
                self.mq_curmsgs.hash(state);
            }
        }
        impl PartialEq for hwtstamp_config {
            fn eq(&self, other: &hwtstamp_config) -> bool {
                self.flags == other.flags
                    && self.tx_type == other.tx_type
                    && self.rx_filter == other.rx_filter
            }
        }
        impl Eq for hwtstamp_config {}
        impl hash::Hash for hwtstamp_config {
            fn hash<H: hash::Hasher>(&self, state: &mut H) {
                self.flags.hash(state);
                self.tx_type.hash(state);
                self.rx_filter.hash(state);
            }
        }

        impl PartialEq for sched_attr {
            fn eq(&self, other: &sched_attr) -> bool {
                self.size == other.size
                    && self.sched_policy == other.sched_policy
                    && self.sched_flags == other.sched_flags
                    && self.sched_nice == other.sched_nice
                    && self.sched_priority == other.sched_priority
                    && self.sched_runtime == other.sched_runtime
                    && self.sched_deadline == other.sched_deadline
                    && self.sched_period == other.sched_period
            }
        }
        impl Eq for sched_attr {}
        impl hash::Hash for sched_attr {
            fn hash<H: hash::Hasher>(&self, state: &mut H) {
                self.size.hash(state);
                self.sched_policy.hash(state);
                self.sched_flags.hash(state);
                self.sched_nice.hash(state);
                self.sched_priority.hash(state);
                self.sched_runtime.hash(state);
                self.sched_deadline.hash(state);
                self.sched_period.hash(state);
            }
        }
    }
}

cfg_if! {
    if #[cfg(any(
        target_env = "gnu",
        target_env = "musl",
        target_env = "ohos"
    ))] {
        pub const ABDAY_1: crate::nl_item = 0x20000;
        pub const ABDAY_2: crate::nl_item = 0x20001;
        pub const ABDAY_3: crate::nl_item = 0x20002;
        pub const ABDAY_4: crate::nl_item = 0x20003;
        pub const ABDAY_5: crate::nl_item = 0x20004;
        pub const ABDAY_6: crate::nl_item = 0x20005;
        pub const ABDAY_7: crate::nl_item = 0x20006;

        pub const DAY_1: crate::nl_item = 0x20007;
        pub const DAY_2: crate::nl_item = 0x20008;
        pub const DAY_3: crate::nl_item = 0x20009;
        pub const DAY_4: crate::nl_item = 0x2000A;
        pub const DAY_5: crate::nl_item = 0x2000B;
        pub const DAY_6: crate::nl_item = 0x2000C;
        pub const DAY_7: crate::nl_item = 0x2000D;

        pub const ABMON_1: crate::nl_item = 0x2000E;
        pub const ABMON_2: crate::nl_item = 0x2000F;
        pub const ABMON_3: crate::nl_item = 0x20010;
        pub const ABMON_4: crate::nl_item = 0x20011;
        pub const ABMON_5: crate::nl_item = 0x20012;
        pub const ABMON_6: crate::nl_item = 0x20013;
        pub const ABMON_7: crate::nl_item = 0x20014;
        pub const ABMON_8: crate::nl_item = 0x20015;
        pub const ABMON_9: crate::nl_item = 0x20016;
        pub const ABMON_10: crate::nl_item = 0x20017;
        pub const ABMON_11: crate::nl_item = 0x20018;
        pub const ABMON_12: crate::nl_item = 0x20019;

        pub const MON_1: crate::nl_item = 0x2001A;
        pub const MON_2: crate::nl_item = 0x2001B;
        pub const MON_3: crate::nl_item = 0x2001C;
        pub const MON_4: crate::nl_item = 0x2001D;
        pub const MON_5: crate::nl_item = 0x2001E;
        pub const MON_6: crate::nl_item = 0x2001F;
        pub const MON_7: crate::nl_item = 0x20020;
        pub const MON_8: crate::nl_item = 0x20021;
        pub const MON_9: crate::nl_item = 0x20022;
        pub const MON_10: crate::nl_item = 0x20023;
        pub const MON_11: crate::nl_item = 0x20024;
        pub const MON_12: crate::nl_item = 0x20025;

        pub const AM_STR: crate::nl_item = 0x20026;
        pub const PM_STR: crate::nl_item = 0x20027;

        pub const D_T_FMT: crate::nl_item = 0x20028;
        pub const D_FMT: crate::nl_item = 0x20029;
        pub const T_FMT: crate::nl_item = 0x2002A;
        pub const T_FMT_AMPM: crate::nl_item = 0x2002B;

        pub const ERA: crate::nl_item = 0x2002C;
        pub const ERA_D_FMT: crate::nl_item = 0x2002E;
        pub const ALT_DIGITS: crate::nl_item = 0x2002F;
        pub const ERA_D_T_FMT: crate::nl_item = 0x20030;
        pub const ERA_T_FMT: crate::nl_item = 0x20031;

        pub const CODESET: crate::nl_item = 14;
        pub const CRNCYSTR: crate::nl_item = 0x4000F;
        pub const RADIXCHAR: crate::nl_item = 0x10000;
        pub const THOUSEP: crate::nl_item = 0x10001;
        pub const YESEXPR: crate::nl_item = 0x50000;
        pub const NOEXPR: crate::nl_item = 0x50001;
        pub const YESSTR: crate::nl_item = 0x50002;
        pub const NOSTR: crate::nl_item = 0x50003;
    }
}

pub const RUSAGE_CHILDREN: c_int = -1;
pub const L_tmpnam: c_uint = 20;
pub const _PC_LINK_MAX: c_int = 0;
pub const _PC_MAX_CANON: c_int = 1;
pub const _PC_MAX_INPUT: c_int = 2;
pub const _PC_NAME_MAX: c_int = 3;
pub const _PC_PATH_MAX: c_int = 4;
pub const _PC_PIPE_BUF: c_int = 5;
pub const _PC_CHOWN_RESTRICTED: c_int = 6;
pub const _PC_NO_TRUNC: c_int = 7;
pub const _PC_VDISABLE: c_int = 8;
pub const _PC_SYNC_IO: c_int = 9;
pub const _PC_ASYNC_IO: c_int = 10;
pub const _PC_PRIO_IO: c_int = 11;
pub const _PC_SOCK_MAXBUF: c_int = 12;
pub const _PC_FILESIZEBITS: c_int = 13;
pub const _PC_REC_INCR_XFER_SIZE: c_int = 14;
pub const _PC_REC_MAX_XFER_SIZE: c_int = 15;
pub const _PC_REC_MIN_XFER_SIZE: c_int = 16;
pub const _PC_REC_XFER_ALIGN: c_int = 17;
pub const _PC_ALLOC_SIZE_MIN: c_int = 18;
pub const _PC_SYMLINK_MAX: c_int = 19;
pub const _PC_2_SYMLINKS: c_int = 20;

pub const MS_NOUSER: c_ulong = 0xffffffff80000000;

pub const _SC_ARG_MAX: c_int = 0;
pub const _SC_CHILD_MAX: c_int = 1;
pub const _SC_CLK_TCK: c_int = 2;
pub const _SC_NGROUPS_MAX: c_int = 3;
pub const _SC_OPEN_MAX: c_int = 4;
pub const _SC_STREAM_MAX: c_int = 5;
pub const _SC_TZNAME_MAX: c_int = 6;
pub const _SC_JOB_CONTROL: c_int = 7;
pub const _SC_SAVED_IDS: c_int = 8;
pub const _SC_REALTIME_SIGNALS: c_int = 9;
pub const _SC_PRIORITY_SCHEDULING: c_int = 10;
pub const _SC_TIMERS: c_int = 11;
pub const _SC_ASYNCHRONOUS_IO: c_int = 12;
pub const _SC_PRIORITIZED_IO: c_int = 13;
pub const _SC_SYNCHRONIZED_IO: c_int = 14;
pub const _SC_FSYNC: c_int = 15;
pub const _SC_MAPPED_FILES: c_int = 16;
pub const _SC_MEMLOCK: c_int = 17;
pub const _SC_MEMLOCK_RANGE: c_int = 18;
pub const _SC_MEMORY_PROTECTION: c_int = 19;
pub const _SC_MESSAGE_PASSING: c_int = 20;
pub const _SC_SEMAPHORES: c_int = 21;
pub const _SC_SHARED_MEMORY_OBJECTS: c_int = 22;
pub const _SC_AIO_LISTIO_MAX: c_int = 23;
pub const _SC_AIO_MAX: c_int = 24;
pub const _SC_AIO_PRIO_DELTA_MAX: c_int = 25;
pub const _SC_DELAYTIMER_MAX: c_int = 26;
pub const _SC_MQ_OPEN_MAX: c_int = 27;
pub const _SC_MQ_PRIO_MAX: c_int = 28;
pub const _SC_VERSION: c_int = 29;
pub const _SC_PAGESIZE: c_int = 30;
pub const _SC_PAGE_SIZE: c_int = _SC_PAGESIZE;
pub const _SC_RTSIG_MAX: c_int = 31;
pub const _SC_SEM_NSEMS_MAX: c_int = 32;
pub const _SC_SEM_VALUE_MAX: c_int = 33;
pub const _SC_SIGQUEUE_MAX: c_int = 34;
pub const _SC_TIMER_MAX: c_int = 35;
pub const _SC_BC_BASE_MAX: c_int = 36;
pub const _SC_BC_DIM_MAX: c_int = 37;
pub const _SC_BC_SCALE_MAX: c_int = 38;
pub const _SC_BC_STRING_MAX: c_int = 39;
pub const _SC_COLL_WEIGHTS_MAX: c_int = 40;
pub const _SC_EXPR_NEST_MAX: c_int = 42;
pub const _SC_LINE_MAX: c_int = 43;
pub const _SC_RE_DUP_MAX: c_int = 44;
pub const _SC_2_VERSION: c_int = 46;
pub const _SC_2_C_BIND: c_int = 47;
pub const _SC_2_C_DEV: c_int = 48;
pub const _SC_2_FORT_DEV: c_int = 49;
pub const _SC_2_FORT_RUN: c_int = 50;
pub const _SC_2_SW_DEV: c_int = 51;
pub const _SC_2_LOCALEDEF: c_int = 52;
pub const _SC_UIO_MAXIOV: c_int = 60;
pub const _SC_IOV_MAX: c_int = 60;
pub const _SC_THREADS: c_int = 67;
pub const _SC_THREAD_SAFE_FUNCTIONS: c_int = 68;
pub const _SC_GETGR_R_SIZE_MAX: c_int = 69;
pub const _SC_GETPW_R_SIZE_MAX: c_int = 70;
pub const _SC_LOGIN_NAME_MAX: c_int = 71;
pub const _SC_TTY_NAME_MAX: c_int = 72;
pub const _SC_THREAD_DESTRUCTOR_ITERATIONS: c_int = 73;
pub const _SC_THREAD_KEYS_MAX: c_int = 74;
pub const _SC_THREAD_STACK_MIN: c_int = 75;
pub const _SC_THREAD_THREADS_MAX: c_int = 76;
pub const _SC_THREAD_ATTR_STACKADDR: c_int = 77;
pub const _SC_THREAD_ATTR_STACKSIZE: c_int = 78;
pub const _SC_THREAD_PRIORITY_SCHEDULING: c_int = 79;
pub const _SC_THREAD_PRIO_INHERIT: c_int = 80;
pub const _SC_THREAD_PRIO_PROTECT: c_int = 81;
pub const _SC_THREAD_PROCESS_SHARED: c_int = 82;
pub const _SC_NPROCESSORS_CONF: c_int = 83;
pub const _SC_NPROCESSORS_ONLN: c_int = 84;
pub const _SC_PHYS_PAGES: c_int = 85;
pub const _SC_AVPHYS_PAGES: c_int = 86;
pub const _SC_ATEXIT_MAX: c_int = 87;
pub const _SC_PASS_MAX: c_int = 88;
pub const _SC_XOPEN_VERSION: c_int = 89;
pub const _SC_XOPEN_XCU_VERSION: c_int = 90;
pub const _SC_XOPEN_UNIX: c_int = 91;
pub const _SC_XOPEN_CRYPT: c_int = 92;
pub const _SC_XOPEN_ENH_I18N: c_int = 93;
pub const _SC_XOPEN_SHM: c_int = 94;
pub const _SC_2_CHAR_TERM: c_int = 95;
pub const _SC_2_UPE: c_int = 97;
pub const _SC_XOPEN_XPG2: c_int = 98;
pub const _SC_XOPEN_XPG3: c_int = 99;
pub const _SC_XOPEN_XPG4: c_int = 100;
pub const _SC_NZERO: c_int = 109;
pub const _SC_XBS5_ILP32_OFF32: c_int = 125;
pub const _SC_XBS5_ILP32_OFFBIG: c_int = 126;
pub const _SC_XBS5_LP64_OFF64: c_int = 127;
pub const _SC_XBS5_LPBIG_OFFBIG: c_int = 128;
pub const _SC_XOPEN_LEGACY: c_int = 129;
pub const _SC_XOPEN_REALTIME: c_int = 130;
pub const _SC_XOPEN_REALTIME_THREADS: c_int = 131;
pub const _SC_ADVISORY_INFO: c_int = 132;
pub const _SC_BARRIERS: c_int = 133;
pub const _SC_CLOCK_SELECTION: c_int = 137;
pub const _SC_CPUTIME: c_int = 138;
pub const _SC_THREAD_CPUTIME: c_int = 139;
pub const _SC_MONOTONIC_CLOCK: c_int = 149;
pub const _SC_READER_WRITER_LOCKS: c_int = 153;
pub const _SC_SPIN_LOCKS: c_int = 154;
pub const _SC_REGEXP: c_int = 155;
pub const _SC_SHELL: c_int = 157;
pub const _SC_SPAWN: c_int = 159;
pub const _SC_SPORADIC_SERVER: c_int = 160;
pub const _SC_THREAD_SPORADIC_SERVER: c_int = 161;
pub const _SC_TIMEOUTS: c_int = 164;
pub const _SC_TYPED_MEMORY_OBJECTS: c_int = 165;
pub const _SC_2_PBS: c_int = 168;
pub const _SC_2_PBS_ACCOUNTING: c_int = 169;
pub const _SC_2_PBS_LOCATE: c_int = 170;
pub const _SC_2_PBS_MESSAGE: c_int = 171;
pub const _SC_2_PBS_TRACK: c_int = 172;
pub const _SC_SYMLOOP_MAX: c_int = 173;
pub const _SC_STREAMS: c_int = 174;
pub const _SC_2_PBS_CHECKPOINT: c_int = 175;
pub const _SC_V6_ILP32_OFF32: c_int = 176;
pub const _SC_V6_ILP32_OFFBIG: c_int = 177;
pub const _SC_V6_LP64_OFF64: c_int = 178;
pub const _SC_V6_LPBIG_OFFBIG: c_int = 179;
pub const _SC_HOST_NAME_MAX: c_int = 180;
pub const _SC_TRACE: c_int = 181;
pub const _SC_TRACE_EVENT_FILTER: c_int = 182;
pub const _SC_TRACE_INHERIT: c_int = 183;
pub const _SC_TRACE_LOG: c_int = 184;
pub const _SC_IPV6: c_int = 235;
pub const _SC_RAW_SOCKETS: c_int = 236;
pub const _SC_V7_ILP32_OFF32: c_int = 237;
pub const _SC_V7_ILP32_OFFBIG: c_int = 238;
pub const _SC_V7_LP64_OFF64: c_int = 239;
pub const _SC_V7_LPBIG_OFFBIG: c_int = 240;
pub const _SC_SS_REPL_MAX: c_int = 241;
pub const _SC_TRACE_EVENT_NAME_MAX: c_int = 242;
pub const _SC_TRACE_NAME_MAX: c_int = 243;
pub const _SC_TRACE_SYS_MAX: c_int = 244;
pub const _SC_TRACE_USER_EVENT_MAX: c_int = 245;
pub const _SC_XOPEN_STREAMS: c_int = 246;
pub const _SC_THREAD_ROBUST_PRIO_INHERIT: c_int = 247;
pub const _SC_THREAD_ROBUST_PRIO_PROTECT: c_int = 248;

pub const _CS_PATH: c_int = 0;
pub const _CS_POSIX_V6_WIDTH_RESTRICTED_ENVS: c_int = 1;
pub const _CS_POSIX_V5_WIDTH_RESTRICTED_ENVS: c_int = 4;
pub const _CS_POSIX_V7_WIDTH_RESTRICTED_ENVS: c_int = 5;
pub const _CS_POSIX_V6_ILP32_OFF32_CFLAGS: c_int = 1116;
pub const _CS_POSIX_V6_ILP32_OFF32_LDFLAGS: c_int = 1117;
pub const _CS_POSIX_V6_ILP32_OFF32_LIBS: c_int = 1118;
pub const _CS_POSIX_V6_ILP32_OFF32_LINTFLAGS: c_int = 1119;
pub const _CS_POSIX_V6_ILP32_OFFBIG_CFLAGS: c_int = 1120;
pub const _CS_POSIX_V6_ILP32_OFFBIG_LDFLAGS: c_int = 1121;
pub const _CS_POSIX_V6_ILP32_OFFBIG_LIBS: c_int = 1122;
pub const _CS_POSIX_V6_ILP32_OFFBIG_LINTFLAGS: c_int = 1123;
pub const _CS_POSIX_V6_LP64_OFF64_CFLAGS: c_int = 1124;
pub const _CS_POSIX_V6_LP64_OFF64_LDFLAGS: c_int = 1125;
pub const _CS_POSIX_V6_LP64_OFF64_LIBS: c_int = 1126;
pub const _CS_POSIX_V6_LP64_OFF64_LINTFLAGS: c_int = 1127;
pub const _CS_POSIX_V6_LPBIG_OFFBIG_CFLAGS: c_int = 1128;
pub const _CS_POSIX_V6_LPBIG_OFFBIG_LDFLAGS: c_int = 1129;
pub const _CS_POSIX_V6_LPBIG_OFFBIG_LIBS: c_int = 1130;
pub const _CS_POSIX_V6_LPBIG_OFFBIG_LINTFLAGS: c_int = 1131;
pub const _CS_POSIX_V7_ILP32_OFF32_CFLAGS: c_int = 1132;
pub const _CS_POSIX_V7_ILP32_OFF32_LDFLAGS: c_int = 1133;
pub const _CS_POSIX_V7_ILP32_OFF32_LIBS: c_int = 1134;
pub const _CS_POSIX_V7_ILP32_OFF32_LINTFLAGS: c_int = 1135;
pub const _CS_POSIX_V7_ILP32_OFFBIG_CFLAGS: c_int = 1136;
pub const _CS_POSIX_V7_ILP32_OFFBIG_LDFLAGS: c_int = 1137;
pub const _CS_POSIX_V7_ILP32_OFFBIG_LIBS: c_int = 1138;
pub const _CS_POSIX_V7_ILP32_OFFBIG_LINTFLAGS: c_int = 1139;
pub const _CS_POSIX_V7_LP64_OFF64_CFLAGS: c_int = 1140;
pub const _CS_POSIX_V7_LP64_OFF64_LDFLAGS: c_int = 1141;
pub const _CS_POSIX_V7_LP64_OFF64_LIBS: c_int = 1142;
pub const _CS_POSIX_V7_LP64_OFF64_LINTFLAGS: c_int = 1143;
pub const _CS_POSIX_V7_LPBIG_OFFBIG_CFLAGS: c_int = 1144;
pub const _CS_POSIX_V7_LPBIG_OFFBIG_LDFLAGS: c_int = 1145;
pub const _CS_POSIX_V7_LPBIG_OFFBIG_LIBS: c_int = 1146;
pub const _CS_POSIX_V7_LPBIG_OFFBIG_LINTFLAGS: c_int = 1147;

pub const RLIM_SAVED_MAX: crate::rlim_t = RLIM_INFINITY;
pub const RLIM_SAVED_CUR: crate::rlim_t = RLIM_INFINITY;

// elf.h - Fields in the e_ident array.
pub const EI_NIDENT: usize = 16;

pub const EI_MAG0: usize = 0;
pub const ELFMAG0: u8 = 0x7f;
pub const EI_MAG1: usize = 1;
pub const ELFMAG1: u8 = b'E';
pub const EI_MAG2: usize = 2;
pub const ELFMAG2: u8 = b'L';
pub const EI_MAG3: usize = 3;
pub const ELFMAG3: u8 = b'F';
pub const SELFMAG: usize = 4;

pub const EI_CLASS: usize = 4;
pub const ELFCLASSNONE: u8 = 0;
pub const ELFCLASS32: u8 = 1;
pub const ELFCLASS64: u8 = 2;
pub const ELFCLASSNUM: usize = 3;

pub const EI_DATA: usize = 5;
pub const ELFDATANONE: u8 = 0;
pub const ELFDATA2LSB: u8 = 1;
pub const ELFDATA2MSB: u8 = 2;
pub const ELFDATANUM: usize = 3;

pub const EI_VERSION: usize = 6;

pub const EI_OSABI: usize = 7;
pub const ELFOSABI_NONE: u8 = 0;
pub const ELFOSABI_SYSV: u8 = 0;
pub const ELFOSABI_HPUX: u8 = 1;
pub const ELFOSABI_NETBSD: u8 = 2;
pub const ELFOSABI_GNU: u8 = 3;
pub const ELFOSABI_LINUX: u8 = ELFOSABI_GNU;
pub const ELFOSABI_SOLARIS: u8 = 6;
pub const ELFOSABI_AIX: u8 = 7;
pub const ELFOSABI_IRIX: u8 = 8;
pub const ELFOSABI_FREEBSD: u8 = 9;
pub const ELFOSABI_TRU64: u8 = 10;
pub const ELFOSABI_MODESTO: u8 = 11;
pub const ELFOSABI_OPENBSD: u8 = 12;
pub const ELFOSABI_ARM: u8 = 97;
pub const ELFOSABI_STANDALONE: u8 = 255;

pub const EI_ABIVERSION: usize = 8;

pub const EI_PAD: usize = 9;

// elf.h - Legal values for e_type (object file type).
pub const ET_NONE: u16 = 0;
pub const ET_REL: u16 = 1;
pub const ET_EXEC: u16 = 2;
pub const ET_DYN: u16 = 3;
pub const ET_CORE: u16 = 4;
pub const ET_NUM: u16 = 5;
pub const ET_LOOS: u16 = 0xfe00;
pub const ET_HIOS: u16 = 0xfeff;
pub const ET_LOPROC: u16 = 0xff00;
pub const ET_HIPROC: u16 = 0xffff;

// elf.h - Legal values for e_machine (architecture).
pub const EM_NONE: u16 = 0;
pub const EM_M32: u16 = 1;
pub const EM_SPARC: u16 = 2;
pub const EM_386: u16 = 3;
pub const EM_68K: u16 = 4;
pub const EM_88K: u16 = 5;
pub const EM_860: u16 = 7;
pub const EM_MIPS: u16 = 8;
pub const EM_S370: u16 = 9;
pub const EM_MIPS_RS3_LE: u16 = 10;
pub const EM_PARISC: u16 = 15;
pub const EM_VPP500: u16 = 17;
pub const EM_SPARC32PLUS: u16 = 18;
pub const EM_960: u16 = 19;
pub const EM_PPC: u16 = 20;
pub const EM_PPC64: u16 = 21;
pub const EM_S390: u16 = 22;
pub const EM_V800: u16 = 36;
pub const EM_FR20: u16 = 37;
pub const EM_RH32: u16 = 38;
pub const EM_RCE: u16 = 39;
pub const EM_ARM: u16 = 40;
pub const EM_FAKE_ALPHA: u16 = 41;
pub const EM_SH: u16 = 42;
pub const EM_SPARCV9: u16 = 43;
pub const EM_TRICORE: u16 = 44;
pub const EM_ARC: u16 = 45;
pub const EM_H8_300: u16 = 46;
pub const EM_H8_300H: u16 = 47;
pub const EM_H8S: u16 = 48;
pub const EM_H8_500: u16 = 49;
pub const EM_IA_64: u16 = 50;
pub const EM_MIPS_X: u16 = 51;
pub const EM_COLDFIRE: u16 = 52;
pub const EM_68HC12: u16 = 53;
pub const EM_MMA: u16 = 54;
pub const EM_PCP: u16 = 55;
pub const EM_NCPU: u16 = 56;
pub const EM_NDR1: u16 = 57;
pub const EM_STARCORE: u16 = 58;
pub const EM_ME16: u16 = 59;
pub const EM_ST100: u16 = 60;
pub const EM_TINYJ: u16 = 61;
pub const EM_X86_64: u16 = 62;
pub const EM_PDSP: u16 = 63;
pub const EM_FX66: u16 = 66;
pub const EM_ST9PLUS: u16 = 67;
pub const EM_ST7: u16 = 68;
pub const EM_68HC16: u16 = 69;
pub const EM_68HC11: u16 = 70;
pub const EM_68HC08: u16 = 71;
pub const EM_68HC05: u16 = 72;
pub const EM_SVX: u16 = 73;
pub const EM_ST19: u16 = 74;
pub const EM_VAX: u16 = 75;
pub const EM_CRIS: u16 = 76;
pub const EM_JAVELIN: u16 = 77;
pub const EM_FIREPATH: u16 = 78;
pub const EM_ZSP: u16 = 79;
pub const EM_MMIX: u16 = 80;
pub const EM_HUANY: u16 = 81;
pub const EM_PRISM: u16 = 82;
pub const EM_AVR: u16 = 83;
pub const EM_FR30: u16 = 84;
pub const EM_D10V: u16 = 85;
pub const EM_D30V: u16 = 86;
pub const EM_V850: u16 = 87;
pub const EM_M32R: u16 = 88;
pub const EM_MN10300: u16 = 89;
pub const EM_MN10200: u16 = 90;
pub const EM_PJ: u16 = 91;
pub const EM_OPENRISC: u16 = 92;
pub const EM_ARC_A5: u16 = 93;
pub const EM_XTENSA: u16 = 94;
pub const EM_AARCH64: u16 = 183;
pub const EM_TILEPRO: u16 = 188;
pub const EM_TILEGX: u16 = 191;
pub const EM_ALPHA: u16 = 0x9026;

// elf.h - Legal values for e_version (version).
pub const EV_NONE: u32 = 0;
pub const EV_CURRENT: u32 = 1;
pub const EV_NUM: u32 = 2;

// elf.h - Legal values for p_type (segment type).
pub const PT_NULL: u32 = 0;
pub const PT_LOAD: u32 = 1;
pub const PT_DYNAMIC: u32 = 2;
pub const PT_INTERP: u32 = 3;
pub const PT_NOTE: u32 = 4;
pub const PT_SHLIB: u32 = 5;
pub const PT_PHDR: u32 = 6;
pub const PT_TLS: u32 = 7;
pub const PT_NUM: u32 = 8;
pub const PT_LOOS: u32 = 0x60000000;
pub const PT_GNU_EH_FRAME: u32 = 0x6474e550;
pub const PT_GNU_STACK: u32 = 0x6474e551;
pub const PT_GNU_RELRO: u32 = 0x6474e552;
pub const PT_LOSUNW: u32 = 0x6ffffffa;
pub const PT_SUNWBSS: u32 = 0x6ffffffa;
pub const PT_SUNWSTACK: u32 = 0x6ffffffb;
pub const PT_HISUNW: u32 = 0x6fffffff;
pub const PT_HIOS: u32 = 0x6fffffff;
pub const PT_LOPROC: u32 = 0x70000000;
pub const PT_HIPROC: u32 = 0x7fffffff;

// Legal values for p_flags (segment flags).
pub const PF_X: u32 = 1 << 0;
pub const PF_W: u32 = 1 << 1;
pub const PF_R: u32 = 1 << 2;
pub const PF_MASKOS: u32 = 0x0ff00000;
pub const PF_MASKPROC: u32 = 0xf0000000;

// elf.h - Legal values for a_type (entry type).
pub const AT_NULL: c_ulong = 0;
pub const AT_IGNORE: c_ulong = 1;
pub const AT_EXECFD: c_ulong = 2;
pub const AT_PHDR: c_ulong = 3;
pub const AT_PHENT: c_ulong = 4;
pub const AT_PHNUM: c_ulong = 5;
pub const AT_PAGESZ: c_ulong = 6;
pub const AT_BASE: c_ulong = 7;
pub const AT_FLAGS: c_ulong = 8;
pub const AT_ENTRY: c_ulong = 9;
pub const AT_NOTELF: c_ulong = 10;
pub const AT_UID: c_ulong = 11;
pub const AT_EUID: c_ulong = 12;
pub const AT_GID: c_ulong = 13;
pub const AT_EGID: c_ulong = 14;
pub const AT_PLATFORM: c_ulong = 15;
pub const AT_HWCAP: c_ulong = 16;
pub const AT_CLKTCK: c_ulong = 17;

pub const AT_SECURE: c_ulong = 23;
pub const AT_BASE_PLATFORM: c_ulong = 24;
pub const AT_RANDOM: c_ulong = 25;
pub const AT_HWCAP2: c_ulong = 26;

pub const AT_EXECFN: c_ulong = 31;

// defined in arch/<arch>/include/uapi/asm/auxvec.h but has the same value
// wherever it is defined.
pub const AT_SYSINFO_EHDR: c_ulong = 33;
pub const AT_MINSIGSTKSZ: c_ulong = 51;

pub const GLOB_ERR: c_int = 1 << 0;
pub const GLOB_MARK: c_int = 1 << 1;
pub const GLOB_NOSORT: c_int = 1 << 2;
pub const GLOB_DOOFFS: c_int = 1 << 3;
pub const GLOB_NOCHECK: c_int = 1 << 4;
pub const GLOB_APPEND: c_int = 1 << 5;
pub const GLOB_NOESCAPE: c_int = 1 << 6;

pub const GLOB_NOSPACE: c_int = 1;
pub const GLOB_ABORTED: c_int = 2;
pub const GLOB_NOMATCH: c_int = 3;

pub const POSIX_MADV_NORMAL: c_int = 0;
pub const POSIX_MADV_RANDOM: c_int = 1;
pub const POSIX_MADV_SEQUENTIAL: c_int = 2;
pub const POSIX_MADV_WILLNEED: c_int = 3;
pub const POSIX_SPAWN_USEVFORK: c_int = 64;
pub const POSIX_SPAWN_SETSID: c_int = 128;

pub const S_IEXEC: mode_t = 0o0100;
pub const S_IWRITE: mode_t = 0o0200;
pub const S_IREAD: mode_t = 0o0400;

pub const F_LOCK: c_int = 1;
pub const F_TEST: c_int = 3;
pub const F_TLOCK: c_int = 2;
pub const F_ULOCK: c_int = 0;

pub const F_SEAL_FUTURE_WRITE: c_int = 0x0010;
pub const F_SEAL_EXEC: c_int = 0x0020;

pub const IFF_LOWER_UP: c_int = 0x10000;
pub const IFF_DORMANT: c_int = 0x20000;
pub const IFF_ECHO: c_int = 0x40000;

// linux/if_addr.h
pub const IFA_UNSPEC: c_ushort = 0;
pub const IFA_ADDRESS: c_ushort = 1;
pub const IFA_LOCAL: c_ushort = 2;
pub const IFA_LABEL: c_ushort = 3;
pub const IFA_BROADCAST: c_ushort = 4;
pub const IFA_ANYCAST: c_ushort = 5;
pub const IFA_CACHEINFO: c_ushort = 6;
pub const IFA_MULTICAST: c_ushort = 7;
pub const IFA_FLAGS: c_ushort = 8;

pub const IFA_F_SECONDARY: u32 = 0x01;
pub const IFA_F_TEMPORARY: u32 = 0x01;
pub const IFA_F_NODAD: u32 = 0x02;
pub const IFA_F_OPTIMISTIC: u32 = 0x04;
pub const IFA_F_DADFAILED: u32 = 0x08;
pub const IFA_F_HOMEADDRESS: u32 = 0x10;
pub const IFA_F_DEPRECATED: u32 = 0x20;
pub const IFA_F_TENTATIVE: u32 = 0x40;
pub const IFA_F_PERMANENT: u32 = 0x80;
pub const IFA_F_MANAGETEMPADDR: u32 = 0x100;
pub const IFA_F_NOPREFIXROUTE: u32 = 0x200;
pub const IFA_F_MCAUTOJOIN: u32 = 0x400;
pub const IFA_F_STABLE_PRIVACY: u32 = 0x800;

// linux/fs.h

// Flags for preadv2/pwritev2
pub const RWF_HIPRI: c_int = 0x00000001;
pub const RWF_DSYNC: c_int = 0x00000002;
pub const RWF_SYNC: c_int = 0x00000004;
pub const RWF_NOWAIT: c_int = 0x00000008;
pub const RWF_APPEND: c_int = 0x00000010;
pub const RWF_NOAPPEND: c_int = 0x00000020;
pub const RWF_ATOMIC: c_int = 0x00000040;
pub const RWF_DONTCACHE: c_int = 0x00000080;

// linux/if_link.h
pub const IFLA_UNSPEC: c_ushort = 0;
pub const IFLA_ADDRESS: c_ushort = 1;
pub const IFLA_BROADCAST: c_ushort = 2;
pub const IFLA_IFNAME: c_ushort = 3;
pub const IFLA_MTU: c_ushort = 4;
pub const IFLA_LINK: c_ushort = 5;
pub const IFLA_QDISC: c_ushort = 6;
pub const IFLA_STATS: c_ushort = 7;
pub const IFLA_COST: c_ushort = 8;
pub const IFLA_PRIORITY: c_ushort = 9;
pub const IFLA_MASTER: c_ushort = 10;
pub const IFLA_WIRELESS: c_ushort = 11;
pub const IFLA_PROTINFO: c_ushort = 12;
pub const IFLA_TXQLEN: c_ushort = 13;
pub const IFLA_MAP: c_ushort = 14;
pub const IFLA_WEIGHT: c_ushort = 15;
pub const IFLA_OPERSTATE: c_ushort = 16;
pub const IFLA_LINKMODE: c_ushort = 17;
pub const IFLA_LINKINFO: c_ushort = 18;
pub const IFLA_NET_NS_PID: c_ushort = 19;
pub const IFLA_IFALIAS: c_ushort = 20;
pub const IFLA_NUM_VF: c_ushort = 21;
pub const IFLA_VFINFO_LIST: c_ushort = 22;
pub const IFLA_STATS64: c_ushort = 23;
pub const IFLA_VF_PORTS: c_ushort = 24;
pub const IFLA_PORT_SELF: c_ushort = 25;
pub const IFLA_AF_SPEC: c_ushort = 26;
pub const IFLA_GROUP: c_ushort = 27;
pub const IFLA_NET_NS_FD: c_ushort = 28;
pub const IFLA_EXT_MASK: c_ushort = 29;
pub const IFLA_PROMISCUITY: c_ushort = 30;
pub const IFLA_NUM_TX_QUEUES: c_ushort = 31;
pub const IFLA_NUM_RX_QUEUES: c_ushort = 32;
pub const IFLA_CARRIER: c_ushort = 33;
pub const IFLA_PHYS_PORT_ID: c_ushort = 34;
pub const IFLA_CARRIER_CHANGES: c_ushort = 35;
pub const IFLA_PHYS_SWITCH_ID: c_ushort = 36;
pub const IFLA_LINK_NETNSID: c_ushort = 37;
pub const IFLA_PHYS_PORT_NAME: c_ushort = 38;
pub const IFLA_PROTO_DOWN: c_ushort = 39;
pub const IFLA_GSO_MAX_SEGS: c_ushort = 40;
pub const IFLA_GSO_MAX_SIZE: c_ushort = 41;
pub const IFLA_PAD: c_ushort = 42;
pub const IFLA_XDP: c_ushort = 43;
pub const IFLA_EVENT: c_ushort = 44;
pub const IFLA_NEW_NETNSID: c_ushort = 45;
pub const IFLA_IF_NETNSID: c_ushort = 46;
pub const IFLA_TARGET_NETNSID: c_ushort = IFLA_IF_NETNSID;
pub const IFLA_CARRIER_UP_COUNT: c_ushort = 47;
pub const IFLA_CARRIER_DOWN_COUNT: c_ushort = 48;
pub const IFLA_NEW_IFINDEX: c_ushort = 49;
pub const IFLA_MIN_MTU: c_ushort = 50;
pub const IFLA_MAX_MTU: c_ushort = 51;
pub const IFLA_PROP_LIST: c_ushort = 52;
pub const IFLA_ALT_IFNAME: c_ushort = 53;
pub const IFLA_PERM_ADDRESS: c_ushort = 54;
pub const IFLA_PROTO_DOWN_REASON: c_ushort = 55;
pub const IFLA_PARENT_DEV_NAME: c_ushort = 56;
pub const IFLA_PARENT_DEV_BUS_NAME: c_ushort = 57;
pub const IFLA_GRO_MAX_SIZE: c_ushort = 58;
pub const IFLA_TSO_MAX_SIZE: c_ushort = 59;
pub const IFLA_TSO_MAX_SEGS: c_ushort = 60;
pub const IFLA_ALLMULTI: c_ushort = 61;

pub const IFLA_INFO_UNSPEC: c_ushort = 0;
pub const IFLA_INFO_KIND: c_ushort = 1;
pub const IFLA_INFO_DATA: c_ushort = 2;
pub const IFLA_INFO_XSTATS: c_ushort = 3;
pub const IFLA_INFO_SLAVE_KIND: c_ushort = 4;
pub const IFLA_INFO_SLAVE_DATA: c_ushort = 5;

// Since Linux 3.1
pub const SEEK_DATA: c_int = 3;
pub const SEEK_HOLE: c_int = 4;

pub const ST_RDONLY: c_ulong = 1;
pub const ST_NOSUID: c_ulong = 2;
pub const ST_NODEV: c_ulong = 4;
pub const ST_NOEXEC: c_ulong = 8;
pub const ST_SYNCHRONOUS: c_ulong = 16;
pub const ST_MANDLOCK: c_ulong = 64;
pub const ST_WRITE: c_ulong = 128;
pub const ST_APPEND: c_ulong = 256;
pub const ST_IMMUTABLE: c_ulong = 512;
pub const ST_NOATIME: c_ulong = 1024;
pub const ST_NODIRATIME: c_ulong = 2048;

pub const RTLD_NEXT: *mut c_void = -1i64 as *mut c_void;
pub const RTLD_DEFAULT: *mut c_void = 0i64 as *mut c_void;
pub const RTLD_NODELETE: c_int = 0x1000;
pub const RTLD_NOW: c_int = 0x2;

pub const AT_EACCESS: c_int = 0x200;

// linux/mempolicy.h
pub const MPOL_DEFAULT: c_int = 0;
pub const MPOL_PREFERRED: c_int = 1;
pub const MPOL_BIND: c_int = 2;
pub const MPOL_INTERLEAVE: c_int = 3;
pub const MPOL_LOCAL: c_int = 4;
pub const MPOL_F_NUMA_BALANCING: c_int = 1 << 13;
pub const MPOL_F_RELATIVE_NODES: c_int = 1 << 14;
pub const MPOL_F_STATIC_NODES: c_int = 1 << 15;

// linux/membarrier.h
pub const MEMBARRIER_CMD_QUERY: c_int = 0;
pub const MEMBARRIER_CMD_GLOBAL: c_int = 1 << 0;
pub const MEMBARRIER_CMD_GLOBAL_EXPEDITED: c_int = 1 << 1;
pub const MEMBARRIER_CMD_REGISTER_GLOBAL_EXPEDITED: c_int = 1 << 2;
pub const MEMBARRIER_CMD_PRIVATE_EXPEDITED: c_int = 1 << 3;
pub const MEMBARRIER_CMD_REGISTER_PRIVATE_EXPEDITED: c_int = 1 << 4;
pub const MEMBARRIER_CMD_PRIVATE_EXPEDITED_SYNC_CORE: c_int = 1 << 5;
pub const MEMBARRIER_CMD_REGISTER_PRIVATE_EXPEDITED_SYNC_CORE: c_int = 1 << 6;
pub const MEMBARRIER_CMD_PRIVATE_EXPEDITED_RSEQ: c_int = 1 << 7;
pub const MEMBARRIER_CMD_REGISTER_PRIVATE_EXPEDITED_RSEQ: c_int = 1 << 8;

pub const PTHREAD_MUTEX_INITIALIZER: pthread_mutex_t = pthread_mutex_t {
    size: [0; __SIZEOF_PTHREAD_MUTEX_T],
};
pub const PTHREAD_COND_INITIALIZER: pthread_cond_t = pthread_cond_t {
    size: [0; __SIZEOF_PTHREAD_COND_T],
};
pub const PTHREAD_RWLOCK_INITIALIZER: pthread_rwlock_t = pthread_rwlock_t {
    size: [0; __SIZEOF_PTHREAD_RWLOCK_T],
};

pub const PTHREAD_BARRIER_SERIAL_THREAD: c_int = -1;
pub const PTHREAD_ONCE_INIT: pthread_once_t = 0;
pub const PTHREAD_MUTEX_NORMAL: c_int = 0;
pub const PTHREAD_MUTEX_RECURSIVE: c_int = 1;
pub const PTHREAD_MUTEX_ERRORCHECK: c_int = 2;
pub const PTHREAD_MUTEX_DEFAULT: c_int = PTHREAD_MUTEX_NORMAL;
pub const PTHREAD_MUTEX_STALLED: c_int = 0;
pub const PTHREAD_MUTEX_ROBUST: c_int = 1;
pub const PTHREAD_PRIO_NONE: c_int = 0;
pub const PTHREAD_PRIO_INHERIT: c_int = 1;
pub const PTHREAD_PRIO_PROTECT: c_int = 2;
pub const PTHREAD_PROCESS_PRIVATE: c_int = 0;
pub const PTHREAD_PROCESS_SHARED: c_int = 1;
pub const PTHREAD_INHERIT_SCHED: c_int = 0;
pub const PTHREAD_EXPLICIT_SCHED: c_int = 1;
pub const __SIZEOF_PTHREAD_COND_T: usize = 48;

pub const RENAME_NOREPLACE: c_uint = 1;
pub const RENAME_EXCHANGE: c_uint = 2;
pub const RENAME_WHITEOUT: c_uint = 4;

// netinet/in.h
// NOTE: These are in addition to the constants defined in src/unix/mod.rs

#[deprecated(
    since = "0.2.80",
    note = "This value was increased in the newer kernel \
            and we'll change this following upstream in the future release. \
            See #1896 for more info."
)]
pub const IPPROTO_MAX: c_int = 256;

// System V IPC
pub const IPC_PRIVATE: crate::key_t = 0;

pub const IPC_CREAT: c_int = 0o1000;
pub const IPC_EXCL: c_int = 0o2000;
pub const IPC_NOWAIT: c_int = 0o4000;

pub const IPC_RMID: c_int = 0;
pub const IPC_SET: c_int = 1;
pub const IPC_STAT: c_int = 2;
pub const IPC_INFO: c_int = 3;
pub const MSG_STAT: c_int = 11;
pub const MSG_INFO: c_int = 12;
pub const MSG_NOTIFICATION: c_int = 0x8000;

pub const MSG_NOERROR: c_int = 0o10000;
pub const MSG_EXCEPT: c_int = 0o20000;
pub const MSG_ZEROCOPY: c_int = 0x4000000;

pub const SEM_UNDO: c_int = 0x1000;

pub const GETPID: c_int = 11;
pub const GETVAL: c_int = 12;
pub const GETALL: c_int = 13;
pub const GETNCNT: c_int = 14;
pub const GETZCNT: c_int = 15;
pub const SETVAL: c_int = 16;
pub const SETALL: c_int = 17;
pub const SEM_STAT: c_int = 18;
pub const SEM_INFO: c_int = 19;
pub const SEM_STAT_ANY: c_int = 20;

pub const SHM_R: c_int = 0o400;
pub const SHM_W: c_int = 0o200;

pub const SHM_RDONLY: c_int = 0o10000;
pub const SHM_RND: c_int = 0o20000;
pub const SHM_REMAP: c_int = 0o40000;

pub const SHM_LOCK: c_int = 11;
pub const SHM_UNLOCK: c_int = 12;

pub const SHM_HUGETLB: c_int = 0o4000;
#[cfg(not(all(target_env = "uclibc", target_arch = "mips")))]
pub const SHM_NORESERVE: c_int = 0o10000;

pub const QFMT_VFS_OLD: c_int = 1;
pub const QFMT_VFS_V0: c_int = 2;
pub const QFMT_VFS_V1: c_int = 4;

pub const EFD_SEMAPHORE: c_int = 0x1;

pub const LOG_NFACILITIES: c_int = 24;

pub const SEM_FAILED: *mut crate::sem_t = 0 as *mut sem_t;

pub const RB_AUTOBOOT: c_int = 0x01234567u32 as i32;
pub const RB_HALT_SYSTEM: c_int = 0xcdef0123u32 as i32;
pub const RB_ENABLE_CAD: c_int = 0x89abcdefu32 as i32;
pub const RB_DISABLE_CAD: c_int = 0x00000000u32 as i32;
pub const RB_POWER_OFF: c_int = 0x4321fedcu32 as i32;
pub const RB_SW_SUSPEND: c_int = 0xd000fce2u32 as i32;
pub const RB_KEXEC: c_int = 0x45584543u32 as i32;

pub const AI_PASSIVE: c_int = 0x0001;
pub const AI_CANONNAME: c_int = 0x0002;
pub const AI_NUMERICHOST: c_int = 0x0004;
pub const AI_V4MAPPED: c_int = 0x0008;
pub const AI_ALL: c_int = 0x0010;
pub const AI_ADDRCONFIG: c_int = 0x0020;

pub const AI_NUMERICSERV: c_int = 0x0400;

pub const EAI_BADFLAGS: c_int = -1;
pub const EAI_NONAME: c_int = -2;
pub const EAI_AGAIN: c_int = -3;
pub const EAI_FAIL: c_int = -4;
pub const EAI_NODATA: c_int = -5;
pub const EAI_FAMILY: c_int = -6;
pub const EAI_SOCKTYPE: c_int = -7;
pub const EAI_SERVICE: c_int = -8;
pub const EAI_MEMORY: c_int = -10;
pub const EAI_SYSTEM: c_int = -11;
pub const EAI_OVERFLOW: c_int = -12;

pub const NI_NUMERICHOST: c_int = 1;
pub const NI_NUMERICSERV: c_int = 2;
pub const NI_NOFQDN: c_int = 4;
pub const NI_NAMEREQD: c_int = 8;
pub const NI_DGRAM: c_int = 16;
pub const NI_IDN: c_int = 32;

pub const SYNC_FILE_RANGE_WAIT_BEFORE: c_uint = 1;
pub const SYNC_FILE_RANGE_WRITE: c_uint = 2;
pub const SYNC_FILE_RANGE_WAIT_AFTER: c_uint = 4;

cfg_if! {
    if #[cfg(not(target_env = "uclibc"))] {
        pub const AIO_CANCELED: c_int = 0;
        pub const AIO_NOTCANCELED: c_int = 1;
        pub const AIO_ALLDONE: c_int = 2;
        pub const LIO_READ: c_int = 0;
        pub const LIO_WRITE: c_int = 1;
        pub const LIO_NOP: c_int = 2;
        pub const LIO_WAIT: c_int = 0;
        pub const LIO_NOWAIT: c_int = 1;
        pub const RUSAGE_THREAD: c_int = 1;
        pub const MSG_COPY: c_int = 0o40000;
        pub const SHM_EXEC: c_int = 0o100000;
        pub const IPV6_MULTICAST_ALL: c_int = 29;
        pub const IPV6_ROUTER_ALERT_ISOLATE: c_int = 30;
        pub const PACKET_MR_UNICAST: c_int = 3;
        pub const PTRACE_EVENT_STOP: c_int = 128;
        pub const UDP_SEGMENT: c_int = 103;
        pub const UDP_GRO: c_int = 104;
    }
}

pub const MREMAP_MAYMOVE: c_int = 1;
pub const MREMAP_FIXED: c_int = 2;
pub const MREMAP_DONTUNMAP: c_int = 4;

// linux/nsfs.h
const NSIO: c_uint = 0xb7;

pub const NS_GET_USERNS: Ioctl = _IO(NSIO, 0x1);
pub const NS_GET_PARENT: Ioctl = _IO(NSIO, 0x2);
pub const NS_GET_NSTYPE: Ioctl = _IO(NSIO, 0x3);
pub const NS_GET_OWNER_UID: Ioctl = _IO(NSIO, 0x4);

pub const NS_GET_MNTNS_ID: Ioctl = _IOR::<__u64>(NSIO, 0x5);

pub const NS_GET_PID_FROM_PIDNS: Ioctl = _IOR::<c_int>(NSIO, 0x6);
pub const NS_GET_TGID_FROM_PIDNS: Ioctl = _IOR::<c_int>(NSIO, 0x7);
pub const NS_GET_PID_IN_PIDNS: Ioctl = _IOR::<c_int>(NSIO, 0x8);
pub const NS_GET_TGID_IN_PIDNS: Ioctl = _IOR::<c_int>(NSIO, 0x9);

pub const MNT_NS_INFO_SIZE_VER0: Ioctl = 16;

pub const NS_MNT_GET_INFO: Ioctl = _IOR::<mnt_ns_info>(NSIO, 10);
pub const NS_MNT_GET_NEXT: Ioctl = _IOR::<mnt_ns_info>(NSIO, 11);
pub const NS_MNT_GET_PREV: Ioctl = _IOR::<mnt_ns_info>(NSIO, 12);

// linux/pidfd.h
pub const PIDFD_NONBLOCK: c_uint = O_NONBLOCK as c_uint;
pub const PIDFD_THREAD: c_uint = O_EXCL as c_uint;

pub const PIDFD_SIGNAL_THREAD: c_uint = 1 << 0;
pub const PIDFD_SIGNAL_THREAD_GROUP: c_uint = 1 << 1;
pub const PIDFD_SIGNAL_PROCESS_GROUP: c_uint = 1 << 2;

pub const PIDFD_INFO_PID: c_uint = 1 << 0;
pub const PIDFD_INFO_CREDS: c_uint = 1 << 1;
pub const PIDFD_INFO_CGROUPID: c_uint = 1 << 2;
pub const PIDFD_INFO_EXIT: c_uint = 1 << 3;

pub const PIDFD_INFO_SIZE_VER0: c_uint = 64;

const PIDFS_IOCTL_MAGIC: c_uint = 0xFF;
pub const PIDFD_GET_CGROUP_NAMESPACE: Ioctl = _IO(PIDFS_IOCTL_MAGIC, 1);
pub const PIDFD_GET_IPC_NAMESPACE: Ioctl = _IO(PIDFS_IOCTL_MAGIC, 2);
pub const PIDFD_GET_MNT_NAMESPACE: Ioctl = _IO(PIDFS_IOCTL_MAGIC, 3);
pub const PIDFD_GET_NET_NAMESPACE: Ioctl = _IO(PIDFS_IOCTL_MAGIC, 4);
pub const PIDFD_GET_PID_NAMESPACE: Ioctl = _IO(PIDFS_IOCTL_MAGIC, 5);
pub const PIDFD_GET_PID_FOR_CHILDREN_NAMESPACE: Ioctl = _IO(PIDFS_IOCTL_MAGIC, 6);
pub const PIDFD_GET_TIME_NAMESPACE: Ioctl = _IO(PIDFS_IOCTL_MAGIC, 7);
pub const PIDFD_GET_TIME_FOR_CHILDREN_NAMESPACE: Ioctl = _IO(PIDFS_IOCTL_MAGIC, 8);
pub const PIDFD_GET_USER_NAMESPACE: Ioctl = _IO(PIDFS_IOCTL_MAGIC, 9);
pub const PIDFD_GET_UTS_NAMESPACE: Ioctl = _IO(PIDFS_IOCTL_MAGIC, 10);
pub const PIDFD_GET_INFO: Ioctl = _IOWR::<pidfd_info>(PIDFS_IOCTL_MAGIC, 11);

// linux/prctl.h
pub const PR_SET_PDEATHSIG: c_int = 1;
pub const PR_GET_PDEATHSIG: c_int = 2;

pub const PR_GET_DUMPABLE: c_int = 3;
pub const PR_SET_DUMPABLE: c_int = 4;

pub const PR_GET_UNALIGN: c_int = 5;
pub const PR_SET_UNALIGN: c_int = 6;
pub const PR_UNALIGN_NOPRINT: c_int = 1;
pub const PR_UNALIGN_SIGBUS: c_int = 2;

pub const PR_GET_KEEPCAPS: c_int = 7;
pub const PR_SET_KEEPCAPS: c_int = 8;

pub const PR_GET_FPEMU: c_int = 9;
pub const PR_SET_FPEMU: c_int = 10;
pub const PR_FPEMU_NOPRINT: c_int = 1;
pub const PR_FPEMU_SIGFPE: c_int = 2;

pub const PR_GET_FPEXC: c_int = 11;
pub const PR_SET_FPEXC: c_int = 12;
pub const PR_FP_EXC_SW_ENABLE: c_int = 0x80;
pub const PR_FP_EXC_DIV: c_int = 0x010000;
pub const PR_FP_EXC_OVF: c_int = 0x020000;
pub const PR_FP_EXC_UND: c_int = 0x040000;
pub const PR_FP_EXC_RES: c_int = 0x080000;
pub const PR_FP_EXC_INV: c_int = 0x100000;
pub const PR_FP_EXC_DISABLED: c_int = 0;
pub const PR_FP_EXC_NONRECOV: c_int = 1;
pub const PR_FP_EXC_ASYNC: c_int = 2;
pub const PR_FP_EXC_PRECISE: c_int = 3;

pub const PR_GET_TIMING: c_int = 13;
pub const PR_SET_TIMING: c_int = 14;
pub const PR_TIMING_STATISTICAL: c_int = 0;
pub const PR_TIMING_TIMESTAMP: c_int = 1;

pub const PR_SET_NAME: c_int = 15;
pub const PR_GET_NAME: c_int = 16;

pub const PR_GET_ENDIAN: c_int = 19;
pub const PR_SET_ENDIAN: c_int = 20;
pub const PR_ENDIAN_BIG: c_int = 0;
pub const PR_ENDIAN_LITTLE: c_int = 1;
pub const PR_ENDIAN_PPC_LITTLE: c_int = 2;

pub const PR_GET_SECCOMP: c_int = 21;
pub const PR_SET_SECCOMP: c_int = 22;

pub const PR_CAPBSET_READ: c_int = 23;
pub const PR_CAPBSET_DROP: c_int = 24;

pub const PR_GET_TSC: c_int = 25;
pub const PR_SET_TSC: c_int = 26;
pub const PR_TSC_ENABLE: c_int = 1;
pub const PR_TSC_SIGSEGV: c_int = 2;

pub const PR_GET_SECUREBITS: c_int = 27;
pub const PR_SET_SECUREBITS: c_int = 28;

pub const PR_SET_TIMERSLACK: c_int = 29;
pub const PR_GET_TIMERSLACK: c_int = 30;

pub const PR_TASK_PERF_EVENTS_DISABLE: c_int = 31;
pub const PR_TASK_PERF_EVENTS_ENABLE: c_int = 32;

pub const PR_MCE_KILL: c_int = 33;
pub const PR_MCE_KILL_CLEAR: c_int = 0;
pub const PR_MCE_KILL_SET: c_int = 1;

pub const PR_MCE_KILL_LATE: c_int = 0;
pub const PR_MCE_KILL_EARLY: c_int = 1;
pub const PR_MCE_KILL_DEFAULT: c_int = 2;

pub const PR_MCE_KILL_GET: c_int = 34;

pub const PR_SET_MM: c_int = 35;
pub const PR_SET_MM_START_CODE: c_int = 1;
pub const PR_SET_MM_END_CODE: c_int = 2;
pub const PR_SET_MM_START_DATA: c_int = 3;
pub const PR_SET_MM_END_DATA: c_int = 4;
pub const PR_SET_MM_START_STACK: c_int = 5;
pub const PR_SET_MM_START_BRK: c_int = 6;
pub const PR_SET_MM_BRK: c_int = 7;
pub const PR_SET_MM_ARG_START: c_int = 8;
pub const PR_SET_MM_ARG_END: c_int = 9;
pub const PR_SET_MM_ENV_START: c_int = 10;
pub const PR_SET_MM_ENV_END: c_int = 11;
pub const PR_SET_MM_AUXV: c_int = 12;
pub const PR_SET_MM_EXE_FILE: c_int = 13;
pub const PR_SET_MM_MAP: c_int = 14;
pub const PR_SET_MM_MAP_SIZE: c_int = 15;

pub const PR_SET_PTRACER: c_int = 0x59616d61;
pub const PR_SET_PTRACER_ANY: c_ulong = 0xffffffffffffffff;

pub const PR_SET_CHILD_SUBREAPER: c_int = 36;
pub const PR_GET_CHILD_SUBREAPER: c_int = 37;

pub const PR_SET_NO_NEW_PRIVS: c_int = 38;
pub const PR_GET_NO_NEW_PRIVS: c_int = 39;

pub const PR_SET_MDWE: c_int = 65;
pub const PR_GET_MDWE: c_int = 66;
pub const PR_MDWE_REFUSE_EXEC_GAIN: c_uint = 1 << 0;
pub const PR_MDWE_NO_INHERIT: c_uint = 1 << 1;

pub const PR_GET_TID_ADDRESS: c_int = 40;

pub const PR_SET_THP_DISABLE: c_int = 41;
pub const PR_GET_THP_DISABLE: c_int = 42;

pub const PR_MPX_ENABLE_MANAGEMENT: c_int = 43;
pub const PR_MPX_DISABLE_MANAGEMENT: c_int = 44;

pub const PR_SET_FP_MODE: c_int = 45;
pub const PR_GET_FP_MODE: c_int = 46;
pub const PR_FP_MODE_FR: c_int = 1 << 0;
pub const PR_FP_MODE_FRE: c_int = 1 << 1;

pub const PR_CAP_AMBIENT: c_int = 47;
pub const PR_CAP_AMBIENT_IS_SET: c_int = 1;
pub const PR_CAP_AMBIENT_RAISE: c_int = 2;
pub const PR_CAP_AMBIENT_LOWER: c_int = 3;
pub const PR_CAP_AMBIENT_CLEAR_ALL: c_int = 4;

pub const PR_SET_VMA: c_int = 0x53564d41;
pub const PR_SET_VMA_ANON_NAME: c_int = 0;

pub const PR_SCHED_CORE: c_int = 62;
pub const PR_SCHED_CORE_GET: c_int = 0;
pub const PR_SCHED_CORE_CREATE: c_int = 1;
pub const PR_SCHED_CORE_SHARE_TO: c_int = 2;
pub const PR_SCHED_CORE_SHARE_FROM: c_int = 3;
pub const PR_SCHED_CORE_MAX: c_int = 4;
pub const PR_SCHED_CORE_SCOPE_THREAD: c_int = 0;
pub const PR_SCHED_CORE_SCOPE_THREAD_GROUP: c_int = 1;
pub const PR_SCHED_CORE_SCOPE_PROCESS_GROUP: c_int = 2;

pub const GRND_NONBLOCK: c_uint = 0x0001;
pub const GRND_RANDOM: c_uint = 0x0002;
pub const GRND_INSECURE: c_uint = 0x0004;

// <linux/seccomp.h>
pub const SECCOMP_MODE_DISABLED: c_uint = 0;
pub const SECCOMP_MODE_STRICT: c_uint = 1;
pub const SECCOMP_MODE_FILTER: c_uint = 2;

pub const SECCOMP_SET_MODE_STRICT: c_uint = 0;
pub const SECCOMP_SET_MODE_FILTER: c_uint = 1;
pub const SECCOMP_GET_ACTION_AVAIL: c_uint = 2;
pub const SECCOMP_GET_NOTIF_SIZES: c_uint = 3;

pub const SECCOMP_FILTER_FLAG_TSYNC: c_ulong = 1 << 0;
pub const SECCOMP_FILTER_FLAG_LOG: c_ulong = 1 << 1;
pub const SECCOMP_FILTER_FLAG_SPEC_ALLOW: c_ulong = 1 << 2;
pub const SECCOMP_FILTER_FLAG_NEW_LISTENER: c_ulong = 1 << 3;
pub const SECCOMP_FILTER_FLAG_TSYNC_ESRCH: c_ulong = 1 << 4;
pub const SECCOMP_FILTER_FLAG_WAIT_KILLABLE_RECV: c_ulong = 1 << 5;

pub const SECCOMP_RET_KILL_PROCESS: c_uint = 0x80000000;
pub const SECCOMP_RET_KILL_THREAD: c_uint = 0x00000000;
pub const SECCOMP_RET_KILL: c_uint = SECCOMP_RET_KILL_THREAD;
pub const SECCOMP_RET_TRAP: c_uint = 0x00030000;
pub const SECCOMP_RET_ERRNO: c_uint = 0x00050000;
pub const SECCOMP_RET_USER_NOTIF: c_uint = 0x7fc00000;
pub const SECCOMP_RET_TRACE: c_uint = 0x7ff00000;
pub const SECCOMP_RET_LOG: c_uint = 0x7ffc0000;
pub const SECCOMP_RET_ALLOW: c_uint = 0x7fff0000;

pub const SECCOMP_RET_ACTION_FULL: c_uint = 0xffff0000;
pub const SECCOMP_RET_ACTION: c_uint = 0x7fff0000;
pub const SECCOMP_RET_DATA: c_uint = 0x0000ffff;

pub const SECCOMP_USER_NOTIF_FLAG_CONTINUE: c_ulong = 1;

pub const SECCOMP_ADDFD_FLAG_SETFD: c_ulong = 1;
pub const SECCOMP_ADDFD_FLAG_SEND: c_ulong = 2;

pub const ITIMER_REAL: c_int = 0;
pub const ITIMER_VIRTUAL: c_int = 1;
pub const ITIMER_PROF: c_int = 2;

pub const TFD_CLOEXEC: c_int = O_CLOEXEC;
pub const TFD_NONBLOCK: c_int = O_NONBLOCK;
pub const TFD_TIMER_ABSTIME: c_int = 1;
pub const TFD_TIMER_CANCEL_ON_SET: c_int = 2;

pub const _POSIX_VDISABLE: crate::cc_t = 0;

pub const FALLOC_FL_KEEP_SIZE: c_int = 0x01;
pub const FALLOC_FL_PUNCH_HOLE: c_int = 0x02;
pub const FALLOC_FL_COLLAPSE_RANGE: c_int = 0x08;
pub const FALLOC_FL_ZERO_RANGE: c_int = 0x10;
pub const FALLOC_FL_INSERT_RANGE: c_int = 0x20;
pub const FALLOC_FL_UNSHARE_RANGE: c_int = 0x40;

#[deprecated(
    since = "0.2.55",
    note = "ENOATTR is not available on Linux; use ENODATA instead"
)]
pub const ENOATTR: c_int = crate::ENODATA;

pub const SO_ORIGINAL_DST: c_int = 80;

pub const IP_RECVFRAGSIZE: c_int = 25;

pub const IPV6_FLOWINFO: c_int = 11;
pub const IPV6_FLOWLABEL_MGR: c_int = 32;
pub const IPV6_FLOWINFO_SEND: c_int = 33;
pub const IPV6_RECVFRAGSIZE: c_int = 77;
pub const IPV6_FREEBIND: c_int = 78;
pub const IPV6_FLOWINFO_FLOWLABEL: c_int = 0x000fffff;
pub const IPV6_FLOWINFO_PRIORITY: c_int = 0x0ff00000;

pub const IPV6_RTHDR_LOOSE: c_int = 0;
pub const IPV6_RTHDR_STRICT: c_int = 1;

// SO_MEMINFO offsets
pub const SK_MEMINFO_RMEM_ALLOC: c_int = 0;
pub const SK_MEMINFO_RCVBUF: c_int = 1;
pub const SK_MEMINFO_WMEM_ALLOC: c_int = 2;
pub const SK_MEMINFO_SNDBUF: c_int = 3;
pub const SK_MEMINFO_FWD_ALLOC: c_int = 4;
pub const SK_MEMINFO_WMEM_QUEUED: c_int = 5;
pub const SK_MEMINFO_OPTMEM: c_int = 6;
pub const SK_MEMINFO_BACKLOG: c_int = 7;
pub const SK_MEMINFO_DROPS: c_int = 8;

pub const IUTF8: crate::tcflag_t = 0x00004000;
#[cfg(not(all(target_env = "uclibc", target_arch = "mips")))]
pub const CMSPAR: crate::tcflag_t = 0o10000000000;

pub const MFD_CLOEXEC: c_uint = 0x0001;
pub const MFD_ALLOW_SEALING: c_uint = 0x0002;
pub const MFD_HUGETLB: c_uint = 0x0004;
pub const MFD_NOEXEC_SEAL: c_uint = 0x0008;
pub const MFD_EXEC: c_uint = 0x0010;
pub const MFD_HUGE_64KB: c_uint = 0x40000000;
pub const MFD_HUGE_512KB: c_uint = 0x4c000000;
pub const MFD_HUGE_1MB: c_uint = 0x50000000;
pub const MFD_HUGE_2MB: c_uint = 0x54000000;
pub const MFD_HUGE_8MB: c_uint = 0x5c000000;
pub const MFD_HUGE_16MB: c_uint = 0x60000000;
pub const MFD_HUGE_32MB: c_uint = 0x64000000;
pub const MFD_HUGE_256MB: c_uint = 0x70000000;
pub const MFD_HUGE_512MB: c_uint = 0x74000000;
pub const MFD_HUGE_1GB: c_uint = 0x78000000;
pub const MFD_HUGE_2GB: c_uint = 0x7c000000;
pub const MFD_HUGE_16GB: c_uint = 0x88000000;
pub const MFD_HUGE_MASK: c_uint = 63;
pub const MFD_HUGE_SHIFT: c_uint = 26;

// linux/close_range.h
pub const CLOSE_RANGE_UNSHARE: c_uint = 1 << 1;
pub const CLOSE_RANGE_CLOEXEC: c_uint = 1 << 2;

// linux/filter.h
pub const SKF_AD_OFF: c_int = -0x1000;
pub const SKF_AD_PROTOCOL: c_int = 0;
pub const SKF_AD_PKTTYPE: c_int = 4;
pub const SKF_AD_IFINDEX: c_int = 8;
pub const SKF_AD_NLATTR: c_int = 12;
pub const SKF_AD_NLATTR_NEST: c_int = 16;
pub const SKF_AD_MARK: c_int = 20;
pub const SKF_AD_QUEUE: c_int = 24;
pub const SKF_AD_HATYPE: c_int = 28;
pub const SKF_AD_RXHASH: c_int = 32;
pub const SKF_AD_CPU: c_int = 36;
pub const SKF_AD_ALU_XOR_X: c_int = 40;
pub const SKF_AD_VLAN_TAG: c_int = 44;
pub const SKF_AD_VLAN_TAG_PRESENT: c_int = 48;
pub const SKF_AD_PAY_OFFSET: c_int = 52;
pub const SKF_AD_RANDOM: c_int = 56;
pub const SKF_AD_VLAN_TPID: c_int = 60;
pub const SKF_AD_MAX: c_int = 64;
pub const SKF_NET_OFF: c_int = -0x100000;
pub const SKF_LL_OFF: c_int = -0x200000;
pub const BPF_NET_OFF: c_int = SKF_NET_OFF;
pub const BPF_LL_OFF: c_int = SKF_LL_OFF;
pub const BPF_MEMWORDS: c_int = 16;
pub const BPF_MAXINSNS: c_int = 4096;

// linux/bpf_common.h
pub const BPF_LD: __u32 = 0x00;
pub const BPF_LDX: __u32 = 0x01;
pub const BPF_ST: __u32 = 0x02;
pub const BPF_STX: __u32 = 0x03;
pub const BPF_ALU: __u32 = 0x04;
pub const BPF_JMP: __u32 = 0x05;
pub const BPF_RET: __u32 = 0x06;
pub const BPF_MISC: __u32 = 0x07;
pub const BPF_W: __u32 = 0x00;
pub const BPF_H: __u32 = 0x08;
pub const BPF_B: __u32 = 0x10;
pub const BPF_IMM: __u32 = 0x00;
pub const BPF_ABS: __u32 = 0x20;
pub const BPF_IND: __u32 = 0x40;
pub const BPF_MEM: __u32 = 0x60;
pub const BPF_LEN: __u32 = 0x80;
pub const BPF_MSH: __u32 = 0xa0;
pub const BPF_ADD: __u32 = 0x00;
pub const BPF_SUB: __u32 = 0x10;
pub const BPF_MUL: __u32 = 0x20;
pub const BPF_DIV: __u32 = 0x30;
pub const BPF_OR: __u32 = 0x40;
pub const BPF_AND: __u32 = 0x50;
pub const BPF_LSH: __u32 = 0x60;
pub const BPF_RSH: __u32 = 0x70;
pub const BPF_NEG: __u32 = 0x80;
pub const BPF_MOD: __u32 = 0x90;
pub const BPF_XOR: __u32 = 0xa0;
pub const BPF_JA: __u32 = 0x00;
pub const BPF_JEQ: __u32 = 0x10;
pub const BPF_JGT: __u32 = 0x20;
pub const BPF_JGE: __u32 = 0x30;
pub const BPF_JSET: __u32 = 0x40;
pub const BPF_K: __u32 = 0x00;
pub const BPF_X: __u32 = 0x08;

// linux/filter.h

pub const BPF_A: __u32 = 0x10;
pub const BPF_TAX: __u32 = 0x00;
pub const BPF_TXA: __u32 = 0x80;

// linux/openat2.h
pub const RESOLVE_NO_XDEV: crate::__u64 = 0x01;
pub const RESOLVE_NO_MAGICLINKS: crate::__u64 = 0x02;
pub const RESOLVE_NO_SYMLINKS: crate::__u64 = 0x04;
pub const RESOLVE_BENEATH: crate::__u64 = 0x08;
pub const RESOLVE_IN_ROOT: crate::__u64 = 0x10;
pub const RESOLVE_CACHED: crate::__u64 = 0x20;

// linux/if_ether.h
pub const ETH_ALEN: c_int = 6;
pub const ETH_HLEN: c_int = 14;
pub const ETH_ZLEN: c_int = 60;
pub const ETH_DATA_LEN: c_int = 1500;
pub const ETH_FRAME_LEN: c_int = 1514;
pub const ETH_FCS_LEN: c_int = 4;

// These are the defined Ethernet Protocol ID's.
pub const ETH_P_LOOP: c_int = 0x0060;
pub const ETH_P_PUP: c_int = 0x0200;
pub const ETH_P_PUPAT: c_int = 0x0201;
pub const ETH_P_IP: c_int = 0x0800;
pub const ETH_P_X25: c_int = 0x0805;
pub const ETH_P_ARP: c_int = 0x0806;
pub const ETH_P_BPQ: c_int = 0x08FF;
pub const ETH_P_IEEEPUP: c_int = 0x0a00;
pub const ETH_P_IEEEPUPAT: c_int = 0x0a01;
pub const ETH_P_BATMAN: c_int = 0x4305;
pub const ETH_P_DEC: c_int = 0x6000;
pub const ETH_P_DNA_DL: c_int = 0x6001;
pub const ETH_P_DNA_RC: c_int = 0x6002;
pub const ETH_P_DNA_RT: c_int = 0x6003;
pub const ETH_P_LAT: c_int = 0x6004;
pub const ETH_P_DIAG: c_int = 0x6005;
pub const ETH_P_CUST: c_int = 0x6006;
pub const ETH_P_SCA: c_int = 0x6007;
pub const ETH_P_TEB: c_int = 0x6558;
pub const ETH_P_RARP: c_int = 0x8035;
pub const ETH_P_ATALK: c_int = 0x809B;
pub const ETH_P_AARP: c_int = 0x80F3;
pub const ETH_P_8021Q: c_int = 0x8100;
pub const ETH_P_IPX: c_int = 0x8137;
pub const ETH_P_IPV6: c_int = 0x86DD;
pub const ETH_P_PAUSE: c_int = 0x8808;
pub const ETH_P_SLOW: c_int = 0x8809;
pub const ETH_P_WCCP: c_int = 0x883E;
pub const ETH_P_MPLS_UC: c_int = 0x8847;
pub const ETH_P_MPLS_MC: c_int = 0x8848;
pub const ETH_P_ATMMPOA: c_int = 0x884c;
pub const ETH_P_PPP_DISC: c_int = 0x8863;
pub const ETH_P_PPP_SES: c_int = 0x8864;
pub const ETH_P_LINK_CTL: c_int = 0x886c;
pub const ETH_P_ATMFATE: c_int = 0x8884;
pub const ETH_P_PAE: c_int = 0x888E;
pub const ETH_P_AOE: c_int = 0x88A2;
pub const ETH_P_8021AD: c_int = 0x88A8;
pub const ETH_P_802_EX1: c_int = 0x88B5;
pub const ETH_P_TIPC: c_int = 0x88CA;
pub const ETH_P_MACSEC: c_int = 0x88E5;
pub const ETH_P_8021AH: c_int = 0x88E7;
pub const ETH_P_MVRP: c_int = 0x88F5;
pub const ETH_P_1588: c_int = 0x88F7;
pub const ETH_P_PRP: c_int = 0x88FB;
pub const ETH_P_FCOE: c_int = 0x8906;
pub const ETH_P_TDLS: c_int = 0x890D;
pub const ETH_P_FIP: c_int = 0x8914;
pub const ETH_P_80221: c_int = 0x8917;
pub const ETH_P_LOOPBACK: c_int = 0x9000;
pub const ETH_P_QINQ1: c_int = 0x9100;
pub const ETH_P_QINQ2: c_int = 0x9200;
pub const ETH_P_QINQ3: c_int = 0x9300;
pub const ETH_P_EDSA: c_int = 0xDADA;
pub const ETH_P_AF_IUCV: c_int = 0xFBFB;

pub const ETH_P_802_3_MIN: c_int = 0x0600;

// Non DIX types. Won't clash for 1500 types.
pub const ETH_P_802_3: c_int = 0x0001;
pub const ETH_P_AX25: c_int = 0x0002;
pub const ETH_P_ALL: c_int = 0x0003;
pub const ETH_P_802_2: c_int = 0x0004;
pub const ETH_P_SNAP: c_int = 0x0005;
pub const ETH_P_DDCMP: c_int = 0x0006;
pub const ETH_P_WAN_PPP: c_int = 0x0007;
pub const ETH_P_PPP_MP: c_int = 0x0008;
pub const ETH_P_LOCALTALK: c_int = 0x0009;
pub const ETH_P_CANFD: c_int = 0x000D;
pub const ETH_P_PPPTALK: c_int = 0x0010;
pub const ETH_P_TR_802_2: c_int = 0x0011;
pub const ETH_P_MOBITEX: c_int = 0x0015;
pub const ETH_P_CONTROL: c_int = 0x0016;
pub const ETH_P_IRDA: c_int = 0x0017;
pub const ETH_P_ECONET: c_int = 0x0018;
pub const ETH_P_HDLC: c_int = 0x0019;
pub const ETH_P_ARCNET: c_int = 0x001A;
pub const ETH_P_DSA: c_int = 0x001B;
pub const ETH_P_TRAILER: c_int = 0x001C;
pub const ETH_P_PHONET: c_int = 0x00F5;
pub const ETH_P_IEEE802154: c_int = 0x00F6;
pub const ETH_P_CAIF: c_int = 0x00F7;

// DIFF(main): changed to `c_short` in f62eb023ab
pub const POSIX_SPAWN_RESETIDS: c_int = 0x01;
pub const POSIX_SPAWN_SETPGROUP: c_int = 0x02;
pub const POSIX_SPAWN_SETSIGDEF: c_int = 0x04;
pub const POSIX_SPAWN_SETSIGMASK: c_int = 0x08;
pub const POSIX_SPAWN_SETSCHEDPARAM: c_int = 0x10;
pub const POSIX_SPAWN_SETSCHEDULER: c_int = 0x20;

pub const NLMSG_NOOP: c_int = 0x1;
pub const NLMSG_ERROR: c_int = 0x2;
pub const NLMSG_DONE: c_int = 0x3;
pub const NLMSG_OVERRUN: c_int = 0x4;
pub const NLMSG_MIN_TYPE: c_int = 0x10;

// linux/netfilter/nfnetlink.h
pub const NFNLGRP_NONE: c_int = 0;
pub const NFNLGRP_CONNTRACK_NEW: c_int = 1;
pub const NFNLGRP_CONNTRACK_UPDATE: c_int = 2;
pub const NFNLGRP_CONNTRACK_DESTROY: c_int = 3;
pub const NFNLGRP_CONNTRACK_EXP_NEW: c_int = 4;
pub const NFNLGRP_CONNTRACK_EXP_UPDATE: c_int = 5;
pub const NFNLGRP_CONNTRACK_EXP_DESTROY: c_int = 6;
pub const NFNLGRP_NFTABLES: c_int = 7;
pub const NFNLGRP_ACCT_QUOTA: c_int = 8;
pub const NFNLGRP_NFTRACE: c_int = 9;

pub const NFNETLINK_V0: c_int = 0;

pub const NFNL_SUBSYS_NONE: c_int = 0;
pub const NFNL_SUBSYS_CTNETLINK: c_int = 1;
pub const NFNL_SUBSYS_CTNETLINK_EXP: c_int = 2;
pub const NFNL_SUBSYS_QUEUE: c_int = 3;
pub const NFNL_SUBSYS_ULOG: c_int = 4;
pub const NFNL_SUBSYS_OSF: c_int = 5;
pub const NFNL_SUBSYS_IPSET: c_int = 6;
pub const NFNL_SUBSYS_ACCT: c_int = 7;
pub const NFNL_SUBSYS_CTNETLINK_TIMEOUT: c_int = 8;
pub const NFNL_SUBSYS_CTHELPER: c_int = 9;
pub const NFNL_SUBSYS_NFTABLES: c_int = 10;
pub const NFNL_SUBSYS_NFT_COMPAT: c_int = 11;
pub const NFNL_SUBSYS_HOOK: c_int = 12;
pub const NFNL_SUBSYS_COUNT: c_int = 13;

pub const NFNL_MSG_BATCH_BEGIN: c_int = NLMSG_MIN_TYPE;
pub const NFNL_MSG_BATCH_END: c_int = NLMSG_MIN_TYPE + 1;

pub const NFNL_BATCH_UNSPEC: c_int = 0;
pub const NFNL_BATCH_GENID: c_int = 1;

// linux/netfilter/nfnetlink_log.h
pub const NFULNL_MSG_PACKET: c_int = 0;
pub const NFULNL_MSG_CONFIG: c_int = 1;

pub const NFULA_VLAN_UNSPEC: c_int = 0;
pub const NFULA_VLAN_PROTO: c_int = 1;
pub const NFULA_VLAN_TCI: c_int = 2;

pub const NFULA_UNSPEC: c_int = 0;
pub const NFULA_PACKET_HDR: c_int = 1;
pub const NFULA_MARK: c_int = 2;
pub const NFULA_TIMESTAMP: c_int = 3;
pub const NFULA_IFINDEX_INDEV: c_int = 4;
pub const NFULA_IFINDEX_OUTDEV: c_int = 5;
pub const NFULA_IFINDEX_PHYSINDEV: c_int = 6;
pub const NFULA_IFINDEX_PHYSOUTDEV: c_int = 7;
pub const NFULA_HWADDR: c_int = 8;
pub const NFULA_PAYLOAD: c_int = 9;
pub const NFULA_PREFIX: c_int = 10;
pub const NFULA_UID: c_int = 11;
pub const NFULA_SEQ: c_int = 12;
pub const NFULA_SEQ_GLOBAL: c_int = 13;
pub const NFULA_GID: c_int = 14;
pub const NFULA_HWTYPE: c_int = 15;
pub const NFULA_HWHEADER: c_int = 16;
pub const NFULA_HWLEN: c_int = 17;
pub const NFULA_CT: c_int = 18;
pub const NFULA_CT_INFO: c_int = 19;
pub const NFULA_VLAN: c_int = 20;
pub const NFULA_L2HDR: c_int = 21;

pub const NFULNL_CFG_CMD_NONE: c_int = 0;
pub const NFULNL_CFG_CMD_BIND: c_int = 1;
pub const NFULNL_CFG_CMD_UNBIND: c_int = 2;
pub const NFULNL_CFG_CMD_PF_BIND: c_int = 3;
pub const NFULNL_CFG_CMD_PF_UNBIND: c_int = 4;

pub const NFULA_CFG_UNSPEC: c_int = 0;
pub const NFULA_CFG_CMD: c_int = 1;
pub const NFULA_CFG_MODE: c_int = 2;
pub const NFULA_CFG_NLBUFSIZ: c_int = 3;
pub const NFULA_CFG_TIMEOUT: c_int = 4;
pub const NFULA_CFG_QTHRESH: c_int = 5;
pub const NFULA_CFG_FLAGS: c_int = 6;

pub const NFULNL_COPY_NONE: c_int = 0x00;
pub const NFULNL_COPY_META: c_int = 0x01;
pub const NFULNL_COPY_PACKET: c_int = 0x02;

pub const NFULNL_CFG_F_SEQ: c_int = 0x0001;
pub const NFULNL_CFG_F_SEQ_GLOBAL: c_int = 0x0002;
pub const NFULNL_CFG_F_CONNTRACK: c_int = 0x0004;

// linux/netfilter/nfnetlink_queue.h
pub const NFQNL_MSG_PACKET: c_int = 0;
pub const NFQNL_MSG_VERDICT: c_int = 1;
pub const NFQNL_MSG_CONFIG: c_int = 2;
pub const NFQNL_MSG_VERDICT_BATCH: c_int = 3;

pub const NFQA_UNSPEC: c_int = 0;
pub const NFQA_PACKET_HDR: c_int = 1;
pub const NFQA_VERDICT_HDR: c_int = 2;
pub const NFQA_MARK: c_int = 3;
pub const NFQA_TIMESTAMP: c_int = 4;
pub const NFQA_IFINDEX_INDEV: c_int = 5;
pub const NFQA_IFINDEX_OUTDEV: c_int = 6;
pub const NFQA_IFINDEX_PHYSINDEV: c_int = 7;
pub const NFQA_IFINDEX_PHYSOUTDEV: c_int = 8;
pub const NFQA_HWADDR: c_int = 9;
pub const NFQA_PAYLOAD: c_int = 10;
pub const NFQA_CT: c_int = 11;
pub const NFQA_CT_INFO: c_int = 12;
pub const NFQA_CAP_LEN: c_int = 13;
pub const NFQA_SKB_INFO: c_int = 14;
pub const NFQA_EXP: c_int = 15;
pub const NFQA_UID: c_int = 16;
pub const NFQA_GID: c_int = 17;
pub const NFQA_SECCTX: c_int = 18;
pub const NFQA_VLAN: c_int = 19;
pub const NFQA_L2HDR: c_int = 20;
pub const NFQA_PRIORITY: c_int = 21;

pub const NFQA_VLAN_UNSPEC: c_int = 0;
pub const NFQA_VLAN_PROTO: c_int = 1;
pub const NFQA_VLAN_TCI: c_int = 2;

pub const NFQNL_CFG_CMD_NONE: c_int = 0;
pub const NFQNL_CFG_CMD_BIND: c_int = 1;
pub const NFQNL_CFG_CMD_UNBIND: c_int = 2;
pub const NFQNL_CFG_CMD_PF_BIND: c_int = 3;
pub const NFQNL_CFG_CMD_PF_UNBIND: c_int = 4;

pub const NFQNL_COPY_NONE: c_int = 0;
pub const NFQNL_COPY_META: c_int = 1;
pub const NFQNL_COPY_PACKET: c_int = 2;

pub const NFQA_CFG_UNSPEC: c_int = 0;
pub const NFQA_CFG_CMD: c_int = 1;
pub const NFQA_CFG_PARAMS: c_int = 2;
pub const NFQA_CFG_QUEUE_MAXLEN: c_int = 3;
pub const NFQA_CFG_MASK: c_int = 4;
pub const NFQA_CFG_FLAGS: c_int = 5;

pub const NFQA_CFG_F_FAIL_OPEN: c_int = 0x0001;
pub const NFQA_CFG_F_CONNTRACK: c_int = 0x0002;
pub const NFQA_CFG_F_GSO: c_int = 0x0004;
pub const NFQA_CFG_F_UID_GID: c_int = 0x0008;
pub const NFQA_CFG_F_SECCTX: c_int = 0x0010;
pub const NFQA_CFG_F_MAX: c_int = 0x0020;

pub const NFQA_SKB_CSUMNOTREADY: c_int = 0x0001;
pub const NFQA_SKB_GSO: c_int = 0x0002;
pub const NFQA_SKB_CSUM_NOTVERIFIED: c_int = 0x0004;

// linux/genetlink.h

pub const GENL_NAMSIZ: c_int = 16;

pub const GENL_MIN_ID: c_int = NLMSG_MIN_TYPE;
pub const GENL_MAX_ID: c_int = 1023;

pub const GENL_ADMIN_PERM: c_int = 0x01;
pub const GENL_CMD_CAP_DO: c_int = 0x02;
pub const GENL_CMD_CAP_DUMP: c_int = 0x04;
pub const GENL_CMD_CAP_HASPOL: c_int = 0x08;

pub const GENL_ID_CTRL: c_int = NLMSG_MIN_TYPE;

pub const CTRL_CMD_UNSPEC: c_int = 0;
pub const CTRL_CMD_NEWFAMILY: c_int = 1;
pub const CTRL_CMD_DELFAMILY: c_int = 2;
pub const CTRL_CMD_GETFAMILY: c_int = 3;
pub const CTRL_CMD_NEWOPS: c_int = 4;
pub const CTRL_CMD_DELOPS: c_int = 5;
pub const CTRL_CMD_GETOPS: c_int = 6;
pub const CTRL_CMD_NEWMCAST_GRP: c_int = 7;
pub const CTRL_CMD_DELMCAST_GRP: c_int = 8;
pub const CTRL_CMD_GETMCAST_GRP: c_int = 9;

pub const CTRL_ATTR_UNSPEC: c_int = 0;
pub const CTRL_ATTR_FAMILY_ID: c_int = 1;
pub const CTRL_ATTR_FAMILY_NAME: c_int = 2;
pub const CTRL_ATTR_VERSION: c_int = 3;
pub const CTRL_ATTR_HDRSIZE: c_int = 4;
pub const CTRL_ATTR_MAXATTR: c_int = 5;
pub const CTRL_ATTR_OPS: c_int = 6;
pub const CTRL_ATTR_MCAST_GROUPS: c_int = 7;

pub const CTRL_ATTR_OP_UNSPEC: c_int = 0;
pub const CTRL_ATTR_OP_ID: c_int = 1;
pub const CTRL_ATTR_OP_FLAGS: c_int = 2;

pub const CTRL_ATTR_MCAST_GRP_UNSPEC: c_int = 0;
pub const CTRL_ATTR_MCAST_GRP_NAME: c_int = 1;
pub const CTRL_ATTR_MCAST_GRP_ID: c_int = 2;

// linux/if_packet.h
pub const PACKET_HOST: c_uchar = 0;
pub const PACKET_BROADCAST: c_uchar = 1;
pub const PACKET_MULTICAST: c_uchar = 2;
pub const PACKET_OTHERHOST: c_uchar = 3;
pub const PACKET_OUTGOING: c_uchar = 4;
pub const PACKET_LOOPBACK: c_uchar = 5;
pub const PACKET_USER: c_uchar = 6;
pub const PACKET_KERNEL: c_uchar = 7;

pub const PACKET_ADD_MEMBERSHIP: c_int = 1;
pub const PACKET_DROP_MEMBERSHIP: c_int = 2;
pub const PACKET_RX_RING: c_int = 5;
pub const PACKET_STATISTICS: c_int = 6;
pub const PACKET_AUXDATA: c_int = 8;
pub const PACKET_VERSION: c_int = 10;
pub const PACKET_RESERVE: c_int = 12;
pub const PACKET_TX_RING: c_int = 13;
pub const PACKET_LOSS: c_int = 14;
pub const PACKET_TIMESTAMP: c_int = 17;
pub const PACKET_FANOUT: c_int = 18;
pub const PACKET_QDISC_BYPASS: c_int = 20;
pub const PACKET_IGNORE_OUTGOING: c_int = 23;

pub const PACKET_FANOUT_HASH: c_uint = 0;
pub const PACKET_FANOUT_LB: c_uint = 1;
pub const PACKET_FANOUT_CPU: c_uint = 2;
pub const PACKET_FANOUT_ROLLOVER: c_uint = 3;
pub const PACKET_FANOUT_RND: c_uint = 4;
pub const PACKET_FANOUT_QM: c_uint = 5;
pub const PACKET_FANOUT_CBPF: c_uint = 6;
pub const PACKET_FANOUT_EBPF: c_uint = 7;
pub const PACKET_FANOUT_FLAG_ROLLOVER: c_uint = 0x1000;
pub const PACKET_FANOUT_FLAG_UNIQUEID: c_uint = 0x2000;
pub const PACKET_FANOUT_FLAG_DEFRAG: c_uint = 0x8000;

pub const PACKET_MR_MULTICAST: c_int = 0;
pub const PACKET_MR_PROMISC: c_int = 1;
pub const PACKET_MR_ALLMULTI: c_int = 2;

pub const TP_STATUS_KERNEL: __u32 = 0;
pub const TP_STATUS_USER: __u32 = 1 << 0;
pub const TP_STATUS_COPY: __u32 = 1 << 1;
pub const TP_STATUS_LOSING: __u32 = 1 << 2;
pub const TP_STATUS_CSUMNOTREADY: __u32 = 1 << 3;
pub const TP_STATUS_VLAN_VALID: __u32 = 1 << 4;
pub const TP_STATUS_BLK_TMO: __u32 = 1 << 5;
pub const TP_STATUS_VLAN_TPID_VALID: __u32 = 1 << 6;
pub const TP_STATUS_CSUM_VALID: __u32 = 1 << 7;

pub const TP_STATUS_AVAILABLE: __u32 = 0;
pub const TP_STATUS_SEND_REQUEST: __u32 = 1 << 0;
pub const TP_STATUS_SENDING: __u32 = 1 << 1;
pub const TP_STATUS_WRONG_FORMAT: __u32 = 1 << 2;

pub const TP_STATUS_TS_SOFTWARE: __u32 = 1 << 29;
pub const TP_STATUS_TS_SYS_HARDWARE: __u32 = 1 << 30;
pub const TP_STATUS_TS_RAW_HARDWARE: __u32 = 1 << 31;

pub const TP_FT_REQ_FILL_RXHASH: __u32 = 1;

pub const TPACKET_ALIGNMENT: usize = 16;

pub const TPACKET_HDRLEN: usize = ((size_of::<crate::tpacket_hdr>() + TPACKET_ALIGNMENT - 1)
    & !(TPACKET_ALIGNMENT - 1))
    + size_of::<crate::sockaddr_ll>();
pub const TPACKET2_HDRLEN: usize = ((size_of::<crate::tpacket2_hdr>() + TPACKET_ALIGNMENT - 1)
    & !(TPACKET_ALIGNMENT - 1))
    + size_of::<crate::sockaddr_ll>();
pub const TPACKET3_HDRLEN: usize = ((size_of::<crate::tpacket3_hdr>() + TPACKET_ALIGNMENT - 1)
    & !(TPACKET_ALIGNMENT - 1))
    + size_of::<crate::sockaddr_ll>();

// linux/netfilter.h
pub const NF_DROP: c_int = 0;
pub const NF_ACCEPT: c_int = 1;
pub const NF_STOLEN: c_int = 2;
pub const NF_QUEUE: c_int = 3;
pub const NF_REPEAT: c_int = 4;
pub const NF_STOP: c_int = 5;
pub const NF_MAX_VERDICT: c_int = NF_STOP;

pub const NF_VERDICT_MASK: c_int = 0x000000ff;
pub const NF_VERDICT_FLAG_QUEUE_BYPASS: c_int = 0x00008000;

pub const NF_VERDICT_QMASK: c_int = 0xffff0000;
pub const NF_VERDICT_QBITS: c_int = 16;

pub const NF_VERDICT_BITS: c_int = 16;

pub const NF_INET_PRE_ROUTING: c_int = 0;
pub const NF_INET_LOCAL_IN: c_int = 1;
pub const NF_INET_FORWARD: c_int = 2;
pub const NF_INET_LOCAL_OUT: c_int = 3;
pub const NF_INET_POST_ROUTING: c_int = 4;
pub const NF_INET_NUMHOOKS: c_int = 5;
pub const NF_INET_INGRESS: c_int = NF_INET_NUMHOOKS;

pub const NF_NETDEV_INGRESS: c_int = 0;
pub const NF_NETDEV_EGRESS: c_int = 1;
pub const NF_NETDEV_NUMHOOKS: c_int = 2;

// Some NFPROTO are not compatible with musl and are defined in submodules.
pub const NFPROTO_UNSPEC: c_int = 0;
pub const NFPROTO_INET: c_int = 1;
pub const NFPROTO_IPV4: c_int = 2;
pub const NFPROTO_ARP: c_int = 3;
pub const NFPROTO_NETDEV: c_int = 5;
pub const NFPROTO_BRIDGE: c_int = 7;
pub const NFPROTO_IPV6: c_int = 10;
pub const NFPROTO_DECNET: c_int = 12;
pub const NFPROTO_NUMPROTO: c_int = 13;

// linux/netfilter_arp.h
pub const NF_ARP: c_int = 0;
pub const NF_ARP_IN: c_int = 0;
pub const NF_ARP_OUT: c_int = 1;
pub const NF_ARP_FORWARD: c_int = 2;
pub const NF_ARP_NUMHOOKS: c_int = 3;

// linux/netfilter_bridge.h
pub const NF_BR_PRE_ROUTING: c_int = 0;
pub const NF_BR_LOCAL_IN: c_int = 1;
pub const NF_BR_FORWARD: c_int = 2;
pub const NF_BR_LOCAL_OUT: c_int = 3;
pub const NF_BR_POST_ROUTING: c_int = 4;
pub const NF_BR_BROUTING: c_int = 5;
pub const NF_BR_NUMHOOKS: c_int = 6;

pub const NF_BR_PRI_FIRST: c_int = crate::INT_MIN;
pub const NF_BR_PRI_NAT_DST_BRIDGED: c_int = -300;
pub const NF_BR_PRI_FILTER_BRIDGED: c_int = -200;
pub const NF_BR_PRI_BRNF: c_int = 0;
pub const NF_BR_PRI_NAT_DST_OTHER: c_int = 100;
pub const NF_BR_PRI_FILTER_OTHER: c_int = 200;
pub const NF_BR_PRI_NAT_SRC: c_int = 300;
pub const NF_BR_PRI_LAST: c_int = crate::INT_MAX;

// linux/netfilter_ipv4.h
pub const NF_IP_PRE_ROUTING: c_int = 0;
pub const NF_IP_LOCAL_IN: c_int = 1;
pub const NF_IP_FORWARD: c_int = 2;
pub const NF_IP_LOCAL_OUT: c_int = 3;
pub const NF_IP_POST_ROUTING: c_int = 4;
pub const NF_IP_NUMHOOKS: c_int = 5;

pub const NF_IP_PRI_FIRST: c_int = crate::INT_MIN;
pub const NF_IP_PRI_RAW_BEFORE_DEFRAG: c_int = -450;
pub const NF_IP_PRI_CONNTRACK_DEFRAG: c_int = -400;
pub const NF_IP_PRI_RAW: c_int = -300;
pub const NF_IP_PRI_SELINUX_FIRST: c_int = -225;
pub const NF_IP_PRI_CONNTRACK: c_int = -200;
pub const NF_IP_PRI_MANGLE: c_int = -150;
pub const NF_IP_PRI_NAT_DST: c_int = -100;
pub const NF_IP_PRI_FILTER: c_int = 0;
pub const NF_IP_PRI_SECURITY: c_int = 50;
pub const NF_IP_PRI_NAT_SRC: c_int = 100;
pub const NF_IP_PRI_SELINUX_LAST: c_int = 225;
pub const NF_IP_PRI_CONNTRACK_HELPER: c_int = 300;
pub const NF_IP_PRI_CONNTRACK_CONFIRM: c_int = crate::INT_MAX;
pub const NF_IP_PRI_LAST: c_int = crate::INT_MAX;

// linux/netfilter_ipv6.h
pub const NF_IP6_PRE_ROUTING: c_int = 0;
pub const NF_IP6_LOCAL_IN: c_int = 1;
pub const NF_IP6_FORWARD: c_int = 2;
pub const NF_IP6_LOCAL_OUT: c_int = 3;
pub const NF_IP6_POST_ROUTING: c_int = 4;
pub const NF_IP6_NUMHOOKS: c_int = 5;

pub const NF_IP6_PRI_FIRST: c_int = crate::INT_MIN;
pub const NF_IP6_PRI_RAW_BEFORE_DEFRAG: c_int = -450;
pub const NF_IP6_PRI_CONNTRACK_DEFRAG: c_int = -400;
pub const NF_IP6_PRI_RAW: c_int = -300;
pub const NF_IP6_PRI_SELINUX_FIRST: c_int = -225;
pub const NF_IP6_PRI_CONNTRACK: c_int = -200;
pub const NF_IP6_PRI_MANGLE: c_int = -150;
pub const NF_IP6_PRI_NAT_DST: c_int = -100;
pub const NF_IP6_PRI_FILTER: c_int = 0;
pub const NF_IP6_PRI_SECURITY: c_int = 50;
pub const NF_IP6_PRI_NAT_SRC: c_int = 100;
pub const NF_IP6_PRI_SELINUX_LAST: c_int = 225;
pub const NF_IP6_PRI_CONNTRACK_HELPER: c_int = 300;
pub const NF_IP6_PRI_LAST: c_int = crate::INT_MAX;

// linux/netfilter_ipv6/ip6_tables.h
pub const IP6T_SO_ORIGINAL_DST: c_int = 80;

pub const SIOCADDRT: c_ulong = 0x0000890B;
pub const SIOCDELRT: c_ulong = 0x0000890C;
pub const SIOCGIFNAME: c_ulong = 0x00008910;
pub const SIOCSIFLINK: c_ulong = 0x00008911;
pub const SIOCGIFCONF: c_ulong = 0x00008912;
pub const SIOCGIFFLAGS: c_ulong = 0x00008913;
pub const SIOCSIFFLAGS: c_ulong = 0x00008914;
pub const SIOCGIFADDR: c_ulong = 0x00008915;
pub const SIOCSIFADDR: c_ulong = 0x00008916;
pub const SIOCGIFDSTADDR: c_ulong = 0x00008917;
pub const SIOCSIFDSTADDR: c_ulong = 0x00008918;
pub const SIOCGIFBRDADDR: c_ulong = 0x00008919;
pub const SIOCSIFBRDADDR: c_ulong = 0x0000891A;
pub const SIOCGIFNETMASK: c_ulong = 0x0000891B;
pub const SIOCSIFNETMASK: c_ulong = 0x0000891C;
pub const SIOCGIFMETRIC: c_ulong = 0x0000891D;
pub const SIOCSIFMETRIC: c_ulong = 0x0000891E;
pub const SIOCGIFMEM: c_ulong = 0x0000891F;
pub const SIOCSIFMEM: c_ulong = 0x00008920;
pub const SIOCGIFMTU: c_ulong = 0x00008921;
pub const SIOCSIFMTU: c_ulong = 0x00008922;
pub const SIOCSIFNAME: c_ulong = 0x00008923;
pub const SIOCSIFHWADDR: c_ulong = 0x00008924;
pub const SIOCGIFENCAP: c_ulong = 0x00008925;
pub const SIOCSIFENCAP: c_ulong = 0x00008926;
pub const SIOCGIFHWADDR: c_ulong = 0x00008927;
pub const SIOCGIFSLAVE: c_ulong = 0x00008929;
pub const SIOCSIFSLAVE: c_ulong = 0x00008930;
pub const SIOCADDMULTI: c_ulong = 0x00008931;
pub const SIOCDELMULTI: c_ulong = 0x00008932;
pub const SIOCGIFINDEX: c_ulong = 0x00008933;
pub const SIOGIFINDEX: c_ulong = SIOCGIFINDEX;
pub const SIOCSIFPFLAGS: c_ulong = 0x00008934;
pub const SIOCGIFPFLAGS: c_ulong = 0x00008935;
pub const SIOCDIFADDR: c_ulong = 0x00008936;
pub const SIOCSIFHWBROADCAST: c_ulong = 0x00008937;
pub const SIOCGIFCOUNT: c_ulong = 0x00008938;
pub const SIOCGIFBR: c_ulong = 0x00008940;
pub const SIOCSIFBR: c_ulong = 0x00008941;
pub const SIOCGIFTXQLEN: c_ulong = 0x00008942;
pub const SIOCSIFTXQLEN: c_ulong = 0x00008943;
pub const SIOCETHTOOL: c_ulong = 0x00008946;
pub const SIOCGMIIPHY: c_ulong = 0x00008947;
pub const SIOCGMIIREG: c_ulong = 0x00008948;
pub const SIOCSMIIREG: c_ulong = 0x00008949;
pub const SIOCWANDEV: c_ulong = 0x0000894A;
pub const SIOCOUTQNSD: c_ulong = 0x0000894B;
pub const SIOCGSKNS: c_ulong = 0x0000894C;
pub const SIOCDARP: c_ulong = 0x00008953;
pub const SIOCGARP: c_ulong = 0x00008954;
pub const SIOCSARP: c_ulong = 0x00008955;
pub const SIOCDRARP: c_ulong = 0x00008960;
pub const SIOCGRARP: c_ulong = 0x00008961;
pub const SIOCSRARP: c_ulong = 0x00008962;
pub const SIOCGIFMAP: c_ulong = 0x00008970;
pub const SIOCSIFMAP: c_ulong = 0x00008971;
pub const SIOCSHWTSTAMP: c_ulong = 0x000089b0;
pub const SIOCGHWTSTAMP: c_ulong = 0x000089b1;

// wireless.h
pub const WIRELESS_EXT: c_ulong = 0x16;

pub const SIOCSIWCOMMIT: c_ulong = 0x8B00;
pub const SIOCGIWNAME: c_ulong = 0x8B01;

pub const SIOCSIWNWID: c_ulong = 0x8B02;
pub const SIOCGIWNWID: c_ulong = 0x8B03;
pub const SIOCSIWFREQ: c_ulong = 0x8B04;
pub const SIOCGIWFREQ: c_ulong = 0x8B05;
pub const SIOCSIWMODE: c_ulong = 0x8B06;
pub const SIOCGIWMODE: c_ulong = 0x8B07;
pub const SIOCSIWSENS: c_ulong = 0x8B08;
pub const SIOCGIWSENS: c_ulong = 0x8B09;

pub const SIOCSIWRANGE: c_ulong = 0x8B0A;
pub const SIOCGIWRANGE: c_ulong = 0x8B0B;
pub const SIOCSIWPRIV: c_ulong = 0x8B0C;
pub const SIOCGIWPRIV: c_ulong = 0x8B0D;
pub const SIOCSIWSTATS: c_ulong = 0x8B0E;
pub const SIOCGIWSTATS: c_ulong = 0x8B0F;

pub const SIOCSIWSPY: c_ulong = 0x8B10;
pub const SIOCGIWSPY: c_ulong = 0x8B11;
pub const SIOCSIWTHRSPY: c_ulong = 0x8B12;
pub const SIOCGIWTHRSPY: c_ulong = 0x8B13;

pub const SIOCSIWAP: c_ulong = 0x8B14;
pub const SIOCGIWAP: c_ulong = 0x8B15;
pub const SIOCGIWAPLIST: c_ulong = 0x8B17;
pub const SIOCSIWSCAN: c_ulong = 0x8B18;
pub const SIOCGIWSCAN: c_ulong = 0x8B19;

pub const SIOCSIWESSID: c_ulong = 0x8B1A;
pub const SIOCGIWESSID: c_ulong = 0x8B1B;
pub const SIOCSIWNICKN: c_ulong = 0x8B1C;
pub const SIOCGIWNICKN: c_ulong = 0x8B1D;

pub const SIOCSIWRATE: c_ulong = 0x8B20;
pub const SIOCGIWRATE: c_ulong = 0x8B21;
pub const SIOCSIWRTS: c_ulong = 0x8B22;
pub const SIOCGIWRTS: c_ulong = 0x8B23;
pub const SIOCSIWFRAG: c_ulong = 0x8B24;
pub const SIOCGIWFRAG: c_ulong = 0x8B25;
pub const SIOCSIWTXPOW: c_ulong = 0x8B26;
pub const SIOCGIWTXPOW: c_ulong = 0x8B27;
pub const SIOCSIWRETRY: c_ulong = 0x8B28;
pub const SIOCGIWRETRY: c_ulong = 0x8B29;

pub const SIOCSIWENCODE: c_ulong = 0x8B2A;
pub const SIOCGIWENCODE: c_ulong = 0x8B2B;

pub const SIOCSIWPOWER: c_ulong = 0x8B2C;
pub const SIOCGIWPOWER: c_ulong = 0x8B2D;

pub const SIOCSIWGENIE: c_ulong = 0x8B30;
pub const SIOCGIWGENIE: c_ulong = 0x8B31;

pub const SIOCSIWMLME: c_ulong = 0x8B16;

pub const SIOCSIWAUTH: c_ulong = 0x8B32;
pub const SIOCGIWAUTH: c_ulong = 0x8B33;

pub const SIOCSIWENCODEEXT: c_ulong = 0x8B34;
pub const SIOCGIWENCODEEXT: c_ulong = 0x8B35;

pub const SIOCSIWPMKSA: c_ulong = 0x8B36;

pub const SIOCIWFIRSTPRIV: c_ulong = 0x8BE0;
pub const SIOCIWLASTPRIV: c_ulong = 0x8BFF;

pub const SIOCIWFIRST: c_ulong = 0x8B00;
pub const SIOCIWLAST: c_ulong = SIOCIWLASTPRIV;

pub const IWEVTXDROP: c_ulong = 0x8C00;
pub const IWEVQUAL: c_ulong = 0x8C01;
pub const IWEVCUSTOM: c_ulong = 0x8C02;
pub const IWEVREGISTERED: c_ulong = 0x8C03;
pub const IWEVEXPIRED: c_ulong = 0x8C04;
pub const IWEVGENIE: c_ulong = 0x8C05;
pub const IWEVMICHAELMICFAILURE: c_ulong = 0x8C06;
pub const IWEVASSOCREQIE: c_ulong = 0x8C07;
pub const IWEVASSOCRESPIE: c_ulong = 0x8C08;
pub const IWEVPMKIDCAND: c_ulong = 0x8C09;
pub const IWEVFIRST: c_ulong = 0x8C00;

pub const IW_PRIV_TYPE_MASK: c_ulong = 0x7000;
pub const IW_PRIV_TYPE_NONE: c_ulong = 0x0000;
pub const IW_PRIV_TYPE_BYTE: c_ulong = 0x1000;
pub const IW_PRIV_TYPE_CHAR: c_ulong = 0x2000;
pub const IW_PRIV_TYPE_INT: c_ulong = 0x4000;
pub const IW_PRIV_TYPE_FLOAT: c_ulong = 0x5000;
pub const IW_PRIV_TYPE_ADDR: c_ulong = 0x6000;

pub const IW_PRIV_SIZE_FIXED: c_ulong = 0x0800;

pub const IW_PRIV_SIZE_MASK: c_ulong = 0x07FF;

pub const IW_MAX_FREQUENCIES: usize = 32;
pub const IW_MAX_BITRATES: usize = 32;
pub const IW_MAX_TXPOWER: usize = 8;
pub const IW_MAX_SPY: usize = 8;
pub const IW_MAX_AP: usize = 64;
pub const IW_ESSID_MAX_SIZE: usize = 32;

pub const IW_MODE_AUTO: usize = 0;
pub const IW_MODE_ADHOC: usize = 1;
pub const IW_MODE_INFRA: usize = 2;
pub const IW_MODE_MASTER: usize = 3;
pub const IW_MODE_REPEAT: usize = 4;
pub const IW_MODE_SECOND: usize = 5;
pub const IW_MODE_MONITOR: usize = 6;
pub const IW_MODE_MESH: usize = 7;

pub const IW_QUAL_QUAL_UPDATED: c_ulong = 0x01;
pub const IW_QUAL_LEVEL_UPDATED: c_ulong = 0x02;
pub const IW_QUAL_NOISE_UPDATED: c_ulong = 0x04;
pub const IW_QUAL_ALL_UPDATED: c_ulong = 0x07;
pub const IW_QUAL_DBM: c_ulong = 0x08;
pub const IW_QUAL_QUAL_INVALID: c_ulong = 0x10;
pub const IW_QUAL_LEVEL_INVALID: c_ulong = 0x20;
pub const IW_QUAL_NOISE_INVALID: c_ulong = 0x40;
pub const IW_QUAL_RCPI: c_ulong = 0x80;
pub const IW_QUAL_ALL_INVALID: c_ulong = 0x70;

pub const IW_FREQ_AUTO: c_ulong = 0x00;
pub const IW_FREQ_FIXED: c_ulong = 0x01;

pub const IW_MAX_ENCODING_SIZES: usize = 8;
pub const IW_ENCODING_TOKEN_MAX: usize = 64;

pub const IW_ENCODE_INDEX: c_ulong = 0x00FF;
pub const IW_ENCODE_FLAGS: c_ulong = 0xFF00;
pub const IW_ENCODE_MODE: c_ulong = 0xF000;
pub const IW_ENCODE_DISABLED: c_ulong = 0x8000;
pub const IW_ENCODE_ENABLED: c_ulong = 0x0000;
pub const IW_ENCODE_RESTRICTED: c_ulong = 0x4000;
pub const IW_ENCODE_OPEN: c_ulong = 0x2000;
pub const IW_ENCODE_NOKEY: c_ulong = 0x0800;
pub const IW_ENCODE_TEMP: c_ulong = 0x0400;

pub const IW_POWER_ON: c_ulong = 0x0000;
pub const IW_POWER_TYPE: c_ulong = 0xF000;
pub const IW_POWER_PERIOD: c_ulong = 0x1000;
pub const IW_POWER_TIMEOUT: c_ulong = 0x2000;
pub const IW_POWER_MODE: c_ulong = 0x0F00;
pub const IW_POWER_UNICAST_R: c_ulong = 0x0100;
pub const IW_POWER_MULTICAST_R: c_ulong = 0x0200;
pub const IW_POWER_ALL_R: c_ulong = 0x0300;
pub const IW_POWER_FORCE_S: c_ulong = 0x0400;
pub const IW_POWER_REPEATER: c_ulong = 0x0800;
pub const IW_POWER_MODIFIER: c_ulong = 0x000F;
pub const IW_POWER_MIN: c_ulong = 0x0001;
pub const IW_POWER_MAX: c_ulong = 0x0002;
pub const IW_POWER_RELATIVE: c_ulong = 0x0004;

pub const IW_TXPOW_TYPE: c_ulong = 0x00FF;
pub const IW_TXPOW_DBM: c_ulong = 0x0000;
pub const IW_TXPOW_MWATT: c_ulong = 0x0001;
pub const IW_TXPOW_RELATIVE: c_ulong = 0x0002;
pub const IW_TXPOW_RANGE: c_ulong = 0x1000;

pub const IW_RETRY_ON: c_ulong = 0x0000;
pub const IW_RETRY_TYPE: c_ulong = 0xF000;
pub const IW_RETRY_LIMIT: c_ulong = 0x1000;
pub const IW_RETRY_LIFETIME: c_ulong = 0x2000;
pub const IW_RETRY_MODIFIER: c_ulong = 0x00FF;
pub const IW_RETRY_MIN: c_ulong = 0x0001;
pub const IW_RETRY_MAX: c_ulong = 0x0002;
pub const IW_RETRY_RELATIVE: c_ulong = 0x0004;
pub const IW_RETRY_SHORT: c_ulong = 0x0010;
pub const IW_RETRY_LONG: c_ulong = 0x0020;

pub const IW_SCAN_DEFAULT: c_ulong = 0x0000;
pub const IW_SCAN_ALL_ESSID: c_ulong = 0x0001;
pub const IW_SCAN_THIS_ESSID: c_ulong = 0x0002;
pub const IW_SCAN_ALL_FREQ: c_ulong = 0x0004;
pub const IW_SCAN_THIS_FREQ: c_ulong = 0x0008;
pub const IW_SCAN_ALL_MODE: c_ulong = 0x0010;
pub const IW_SCAN_THIS_MODE: c_ulong = 0x0020;
pub const IW_SCAN_ALL_RATE: c_ulong = 0x0040;
pub const IW_SCAN_THIS_RATE: c_ulong = 0x0080;

pub const IW_SCAN_TYPE_ACTIVE: usize = 0;
pub const IW_SCAN_TYPE_PASSIVE: usize = 1;

pub const IW_SCAN_MAX_DATA: usize = 4096;

pub const IW_SCAN_CAPA_NONE: c_ulong = 0x00;
pub const IW_SCAN_CAPA_ESSID: c_ulong = 0x01;
pub const IW_SCAN_CAPA_BSSID: c_ulong = 0x02;
pub const IW_SCAN_CAPA_CHANNEL: c_ulong = 0x04;
pub const IW_SCAN_CAPA_MODE: c_ulong = 0x08;
pub const IW_SCAN_CAPA_RATE: c_ulong = 0x10;
pub const IW_SCAN_CAPA_TYPE: c_ulong = 0x20;
pub const IW_SCAN_CAPA_TIME: c_ulong = 0x40;

pub const IW_CUSTOM_MAX: c_ulong = 256;

pub const IW_GENERIC_IE_MAX: c_ulong = 1024;

pub const IW_MLME_DEAUTH: c_ulong = 0;
pub const IW_MLME_DISASSOC: c_ulong = 1;
pub const IW_MLME_AUTH: c_ulong = 2;
pub const IW_MLME_ASSOC: c_ulong = 3;

pub const IW_AUTH_INDEX: c_ulong = 0x0FFF;
pub const IW_AUTH_FLAGS: c_ulong = 0xF000;

pub const IW_AUTH_WPA_VERSION: usize = 0;
pub const IW_AUTH_CIPHER_PAIRWISE: usize = 1;
pub const IW_AUTH_CIPHER_GROUP: usize = 2;
pub const IW_AUTH_KEY_MGMT: usize = 3;
pub const IW_AUTH_TKIP_COUNTERMEASURES: usize = 4;
pub const IW_AUTH_DROP_UNENCRYPTED: usize = 5;
pub const IW_AUTH_80211_AUTH_ALG: usize = 6;
pub const IW_AUTH_WPA_ENABLED: usize = 7;
pub const IW_AUTH_RX_UNENCRYPTED_EAPOL: usize = 8;
pub const IW_AUTH_ROAMING_CONTROL: usize = 9;
pub const IW_AUTH_PRIVACY_INVOKED: usize = 10;
pub const IW_AUTH_CIPHER_GROUP_MGMT: usize = 11;
pub const IW_AUTH_MFP: usize = 12;

pub const IW_AUTH_WPA_VERSION_DISABLED: c_ulong = 0x00000001;
pub const IW_AUTH_WPA_VERSION_WPA: c_ulong = 0x00000002;
pub const IW_AUTH_WPA_VERSION_WPA2: c_ulong = 0x00000004;

pub const IW_AUTH_CIPHER_NONE: c_ulong = 0x00000001;
pub const IW_AUTH_CIPHER_WEP40: c_ulong = 0x00000002;
pub const IW_AUTH_CIPHER_TKIP: c_ulong = 0x00000004;
pub const IW_AUTH_CIPHER_CCMP: c_ulong = 0x00000008;
pub const IW_AUTH_CIPHER_WEP104: c_ulong = 0x00000010;
pub const IW_AUTH_CIPHER_AES_CMAC: c_ulong = 0x00000020;

pub const IW_AUTH_KEY_MGMT_802_1X: usize = 1;
pub const IW_AUTH_KEY_MGMT_PSK: usize = 2;

pub const IW_AUTH_ALG_OPEN_SYSTEM: c_ulong = 0x00000001;
pub const IW_AUTH_ALG_SHARED_KEY: c_ulong = 0x00000002;
pub const IW_AUTH_ALG_LEAP: c_ulong = 0x00000004;

pub const IW_AUTH_ROAMING_ENABLE: usize = 0;
pub const IW_AUTH_ROAMING_DISABLE: usize = 1;

pub const IW_AUTH_MFP_DISABLED: usize = 0;
pub const IW_AUTH_MFP_OPTIONAL: usize = 1;
pub const IW_AUTH_MFP_REQUIRED: usize = 2;

pub const IW_ENCODE_SEQ_MAX_SIZE: usize = 8;

pub const IW_ENCODE_ALG_NONE: usize = 0;
pub const IW_ENCODE_ALG_WEP: usize = 1;
pub const IW_ENCODE_ALG_TKIP: usize = 2;
pub const IW_ENCODE_ALG_CCMP: usize = 3;
pub const IW_ENCODE_ALG_PMK: usize = 4;
pub const IW_ENCODE_ALG_AES_CMAC: usize = 5;

pub const IW_ENCODE_EXT_TX_SEQ_VALID: c_ulong = 0x00000001;
pub const IW_ENCODE_EXT_RX_SEQ_VALID: c_ulong = 0x00000002;
pub const IW_ENCODE_EXT_GROUP_KEY: c_ulong = 0x00000004;
pub const IW_ENCODE_EXT_SET_TX_KEY: c_ulong = 0x00000008;

pub const IW_MICFAILURE_KEY_ID: c_ulong = 0x00000003;
pub const IW_MICFAILURE_GROUP: c_ulong = 0x00000004;
pub const IW_MICFAILURE_PAIRWISE: c_ulong = 0x00000008;
pub const IW_MICFAILURE_STAKEY: c_ulong = 0x00000010;
pub const IW_MICFAILURE_COUNT: c_ulong = 0x00000060;

pub const IW_ENC_CAPA_WPA: c_ulong = 0x00000001;
pub const IW_ENC_CAPA_WPA2: c_ulong = 0x00000002;
pub const IW_ENC_CAPA_CIPHER_TKIP: c_ulong = 0x00000004;
pub const IW_ENC_CAPA_CIPHER_CCMP: c_ulong = 0x00000008;
pub const IW_ENC_CAPA_4WAY_HANDSHAKE: c_ulong = 0x00000010;

pub const IW_EVENT_CAPA_K_0: c_ulong = 0x4000050; //   IW_EVENT_CAPA_MASK(0x8B04) | IW_EVENT_CAPA_MASK(0x8B06) | IW_EVENT_CAPA_MASK(0x8B1A);
pub const IW_EVENT_CAPA_K_1: c_ulong = 0x400; //   W_EVENT_CAPA_MASK(0x8B2A);

pub const IW_PMKSA_ADD: usize = 1;
pub const IW_PMKSA_REMOVE: usize = 2;
pub const IW_PMKSA_FLUSH: usize = 3;

pub const IW_PMKID_LEN: usize = 16;

pub const IW_PMKID_CAND_PREAUTH: c_ulong = 0x00000001;

pub const IW_EV_LCP_PK_LEN: usize = 4;

pub const IW_EV_CHAR_PK_LEN: usize = 20; // IW_EV_LCP_PK_LEN + crate::IFNAMSIZ;
pub const IW_EV_UINT_PK_LEN: usize = 8; // IW_EV_LCP_PK_LEN + size_of::<u32>();
pub const IW_EV_FREQ_PK_LEN: usize = 12; // IW_EV_LCP_PK_LEN + size_of::<iw_freq>();
pub const IW_EV_PARAM_PK_LEN: usize = 12; // IW_EV_LCP_PK_LEN + size_of::<iw_param>();
pub const IW_EV_ADDR_PK_LEN: usize = 20; // IW_EV_LCP_PK_LEN + size_of::<crate::sockaddr>();
pub const IW_EV_QUAL_PK_LEN: usize = 8; // IW_EV_LCP_PK_LEN + size_of::<iw_quality>();
pub const IW_EV_POINT_PK_LEN: usize = 8; // IW_EV_LCP_PK_LEN + 4;

pub const IPTOS_TOS_MASK: u8 = 0x1E;
pub const IPTOS_PREC_MASK: u8 = 0xE0;

pub const IPTOS_ECN_NOT_ECT: u8 = 0x00;

pub const RTF_UP: c_ushort = 0x0001;
pub const RTF_GATEWAY: c_ushort = 0x0002;

pub const RTF_HOST: c_ushort = 0x0004;
pub const RTF_REINSTATE: c_ushort = 0x0008;
pub const RTF_DYNAMIC: c_ushort = 0x0010;
pub const RTF_MODIFIED: c_ushort = 0x0020;
pub const RTF_MTU: c_ushort = 0x0040;
pub const RTF_MSS: c_ushort = RTF_MTU;
pub const RTF_WINDOW: c_ushort = 0x0080;
pub const RTF_IRTT: c_ushort = 0x0100;
pub const RTF_REJECT: c_ushort = 0x0200;
pub const RTF_STATIC: c_ushort = 0x0400;
pub const RTF_XRESOLVE: c_ushort = 0x0800;
pub const RTF_NOFORWARD: c_ushort = 0x1000;
pub const RTF_THROW: c_ushort = 0x2000;
pub const RTF_NOPMTUDISC: c_ushort = 0x4000;

pub const RTF_DEFAULT: u32 = 0x00010000;
pub const RTF_ALLONLINK: u32 = 0x00020000;
pub const RTF_ADDRCONF: u32 = 0x00040000;
pub const RTF_LINKRT: u32 = 0x00100000;
pub const RTF_NONEXTHOP: u32 = 0x00200000;
pub const RTF_CACHE: u32 = 0x01000000;
pub const RTF_FLOW: u32 = 0x02000000;
pub const RTF_POLICY: u32 = 0x04000000;

pub const RTCF_VALVE: u32 = 0x00200000;
pub const RTCF_MASQ: u32 = 0x00400000;
pub const RTCF_NAT: u32 = 0x00800000;
pub const RTCF_DOREDIRECT: u32 = 0x01000000;
pub const RTCF_LOG: u32 = 0x02000000;
pub const RTCF_DIRECTSRC: u32 = 0x04000000;

pub const RTF_LOCAL: u32 = 0x80000000;
pub const RTF_INTERFACE: u32 = 0x40000000;
pub const RTF_MULTICAST: u32 = 0x20000000;
pub const RTF_BROADCAST: u32 = 0x10000000;
pub const RTF_NAT: u32 = 0x08000000;
pub const RTF_ADDRCLASSMASK: u32 = 0xF8000000;

pub const RT_CLASS_UNSPEC: u8 = 0;
pub const RT_CLASS_DEFAULT: u8 = 253;
pub const RT_CLASS_MAIN: u8 = 254;
pub const RT_CLASS_LOCAL: u8 = 255;
pub const RT_CLASS_MAX: u8 = 255;

// linux/neighbor.h
pub const NUD_NONE: u16 = 0x00;
pub const NUD_INCOMPLETE: u16 = 0x01;
pub const NUD_REACHABLE: u16 = 0x02;
pub const NUD_STALE: u16 = 0x04;
pub const NUD_DELAY: u16 = 0x08;
pub const NUD_PROBE: u16 = 0x10;
pub const NUD_FAILED: u16 = 0x20;
pub const NUD_NOARP: u16 = 0x40;
pub const NUD_PERMANENT: u16 = 0x80;

pub const NTF_USE: u8 = 0x01;
pub const NTF_SELF: u8 = 0x02;
pub const NTF_MASTER: u8 = 0x04;
pub const NTF_PROXY: u8 = 0x08;
pub const NTF_ROUTER: u8 = 0x80;

pub const NDA_UNSPEC: c_ushort = 0;
pub const NDA_DST: c_ushort = 1;
pub const NDA_LLADDR: c_ushort = 2;
pub const NDA_CACHEINFO: c_ushort = 3;
pub const NDA_PROBES: c_ushort = 4;
pub const NDA_VLAN: c_ushort = 5;
pub const NDA_PORT: c_ushort = 6;
pub const NDA_VNI: c_ushort = 7;
pub const NDA_IFINDEX: c_ushort = 8;

// linux/netlink.h
pub const NLA_ALIGNTO: c_int = 4;

pub const NETLINK_ROUTE: c_int = 0;
pub const NETLINK_UNUSED: c_int = 1;
pub const NETLINK_USERSOCK: c_int = 2;
pub const NETLINK_FIREWALL: c_int = 3;
pub const NETLINK_SOCK_DIAG: c_int = 4;
pub const NETLINK_NFLOG: c_int = 5;
pub const NETLINK_XFRM: c_int = 6;
pub const NETLINK_SELINUX: c_int = 7;
pub const NETLINK_ISCSI: c_int = 8;
pub const NETLINK_AUDIT: c_int = 9;
pub const NETLINK_FIB_LOOKUP: c_int = 10;
pub const NETLINK_CONNECTOR: c_int = 11;
pub const NETLINK_NETFILTER: c_int = 12;
pub const NETLINK_IP6_FW: c_int = 13;
pub const NETLINK_DNRTMSG: c_int = 14;
pub const NETLINK_KOBJECT_UEVENT: c_int = 15;
pub const NETLINK_GENERIC: c_int = 16;
pub const NETLINK_SCSITRANSPORT: c_int = 18;
pub const NETLINK_ECRYPTFS: c_int = 19;
pub const NETLINK_RDMA: c_int = 20;
pub const NETLINK_CRYPTO: c_int = 21;
pub const NETLINK_INET_DIAG: c_int = NETLINK_SOCK_DIAG;

pub const NLM_F_REQUEST: c_int = 1;
pub const NLM_F_MULTI: c_int = 2;
pub const NLM_F_ACK: c_int = 4;
pub const NLM_F_ECHO: c_int = 8;
pub const NLM_F_DUMP_INTR: c_int = 16;
pub const NLM_F_DUMP_FILTERED: c_int = 32;

pub const NLM_F_ROOT: c_int = 0x100;
pub const NLM_F_MATCH: c_int = 0x200;
pub const NLM_F_ATOMIC: c_int = 0x400;
pub const NLM_F_DUMP: c_int = NLM_F_ROOT | NLM_F_MATCH;

pub const NLM_F_REPLACE: c_int = 0x100;
pub const NLM_F_EXCL: c_int = 0x200;
pub const NLM_F_CREATE: c_int = 0x400;
pub const NLM_F_APPEND: c_int = 0x800;

pub const NLM_F_NONREC: c_int = 0x100;
pub const NLM_F_BULK: c_int = 0x200;

pub const NLM_F_CAPPED: c_int = 0x100;
pub const NLM_F_ACK_TLVS: c_int = 0x200;

pub const NETLINK_ADD_MEMBERSHIP: c_int = 1;
pub const NETLINK_DROP_MEMBERSHIP: c_int = 2;
pub const NETLINK_PKTINFO: c_int = 3;
pub const NETLINK_BROADCAST_ERROR: c_int = 4;
pub const NETLINK_NO_ENOBUFS: c_int = 5;
pub const NETLINK_RX_RING: c_int = 6;
pub const NETLINK_TX_RING: c_int = 7;
pub const NETLINK_LISTEN_ALL_NSID: c_int = 8;
pub const NETLINK_LIST_MEMBERSHIPS: c_int = 9;
pub const NETLINK_CAP_ACK: c_int = 10;
pub const NETLINK_EXT_ACK: c_int = 11;
pub const NETLINK_GET_STRICT_CHK: c_int = 12;

pub const NLA_F_NESTED: c_int = 1 << 15;
pub const NLA_F_NET_BYTEORDER: c_int = 1 << 14;
pub const NLA_TYPE_MASK: c_int = !(NLA_F_NESTED | NLA_F_NET_BYTEORDER);

// linux/rtnetlink.h
pub const TCA_UNSPEC: c_ushort = 0;
pub const TCA_KIND: c_ushort = 1;
pub const TCA_OPTIONS: c_ushort = 2;
pub const TCA_STATS: c_ushort = 3;
pub const TCA_XSTATS: c_ushort = 4;
pub const TCA_RATE: c_ushort = 5;
pub const TCA_FCNT: c_ushort = 6;
pub const TCA_STATS2: c_ushort = 7;
pub const TCA_STAB: c_ushort = 8;

pub const RTM_NEWLINK: u16 = 16;
pub const RTM_DELLINK: u16 = 17;
pub const RTM_GETLINK: u16 = 18;
pub const RTM_SETLINK: u16 = 19;
pub const RTM_NEWADDR: u16 = 20;
pub const RTM_DELADDR: u16 = 21;
pub const RTM_GETADDR: u16 = 22;
pub const RTM_NEWROUTE: u16 = 24;
pub const RTM_DELROUTE: u16 = 25;
pub const RTM_GETROUTE: u16 = 26;
pub const RTM_NEWNEIGH: u16 = 28;
pub const RTM_DELNEIGH: u16 = 29;
pub const RTM_GETNEIGH: u16 = 30;
pub const RTM_NEWRULE: u16 = 32;
pub const RTM_DELRULE: u16 = 33;
pub const RTM_GETRULE: u16 = 34;
pub const RTM_NEWQDISC: u16 = 36;
pub const RTM_DELQDISC: u16 = 37;
pub const RTM_GETQDISC: u16 = 38;
pub const RTM_NEWTCLASS: u16 = 40;
pub const RTM_DELTCLASS: u16 = 41;
pub const RTM_GETTCLASS: u16 = 42;
pub const RTM_NEWTFILTER: u16 = 44;
pub const RTM_DELTFILTER: u16 = 45;
pub const RTM_GETTFILTER: u16 = 46;
pub const RTM_NEWACTION: u16 = 48;
pub const RTM_DELACTION: u16 = 49;
pub const RTM_GETACTION: u16 = 50;
pub const RTM_NEWPREFIX: u16 = 52;
pub const RTM_GETMULTICAST: u16 = 58;
pub const RTM_GETANYCAST: u16 = 62;
pub const RTM_NEWNEIGHTBL: u16 = 64;
pub const RTM_GETNEIGHTBL: u16 = 66;
pub const RTM_SETNEIGHTBL: u16 = 67;
pub const RTM_NEWNDUSEROPT: u16 = 68;
pub const RTM_NEWADDRLABEL: u16 = 72;
pub const RTM_DELADDRLABEL: u16 = 73;
pub const RTM_GETADDRLABEL: u16 = 74;
pub const RTM_GETDCB: u16 = 78;
pub const RTM_SETDCB: u16 = 79;
pub const RTM_NEWNETCONF: u16 = 80;
pub const RTM_GETNETCONF: u16 = 82;
pub const RTM_NEWMDB: u16 = 84;
pub const RTM_DELMDB: u16 = 85;
pub const RTM_GETMDB: u16 = 86;
pub const RTM_NEWNSID: u16 = 88;
pub const RTM_DELNSID: u16 = 89;
pub const RTM_GETNSID: u16 = 90;

pub const RTM_F_NOTIFY: c_uint = 0x100;
pub const RTM_F_CLONED: c_uint = 0x200;
pub const RTM_F_EQUALIZE: c_uint = 0x400;
pub const RTM_F_PREFIX: c_uint = 0x800;

pub const RTA_UNSPEC: c_ushort = 0;
pub const RTA_DST: c_ushort = 1;
pub const RTA_SRC: c_ushort = 2;
pub const RTA_IIF: c_ushort = 3;
pub const RTA_OIF: c_ushort = 4;
pub const RTA_GATEWAY: c_ushort = 5;
pub const RTA_PRIORITY: c_ushort = 6;
pub const RTA_PREFSRC: c_ushort = 7;
pub const RTA_METRICS: c_ushort = 8;
pub const RTA_MULTIPATH: c_ushort = 9;
pub const RTA_PROTOINFO: c_ushort = 10; // No longer used
pub const RTA_FLOW: c_ushort = 11;
pub const RTA_CACHEINFO: c_ushort = 12;
pub const RTA_SESSION: c_ushort = 13; // No longer used
pub const RTA_MP_ALGO: c_ushort = 14; // No longer used
pub const RTA_TABLE: c_ushort = 15;
pub const RTA_MARK: c_ushort = 16;
pub const RTA_MFC_STATS: c_ushort = 17;

pub const RTN_UNSPEC: c_uchar = 0;
pub const RTN_UNICAST: c_uchar = 1;
pub const RTN_LOCAL: c_uchar = 2;
pub const RTN_BROADCAST: c_uchar = 3;
pub const RTN_ANYCAST: c_uchar = 4;
pub const RTN_MULTICAST: c_uchar = 5;
pub const RTN_BLACKHOLE: c_uchar = 6;
pub const RTN_UNREACHABLE: c_uchar = 7;
pub const RTN_PROHIBIT: c_uchar = 8;
pub const RTN_THROW: c_uchar = 9;
pub const RTN_NAT: c_uchar = 10;
pub const RTN_XRESOLVE: c_uchar = 11;

pub const RTPROT_UNSPEC: c_uchar = 0;
pub const RTPROT_REDIRECT: c_uchar = 1;
pub const RTPROT_KERNEL: c_uchar = 2;
pub const RTPROT_BOOT: c_uchar = 3;
pub const RTPROT_STATIC: c_uchar = 4;

pub const RT_SCOPE_UNIVERSE: c_uchar = 0;
pub const RT_SCOPE_SITE: c_uchar = 200;
pub const RT_SCOPE_LINK: c_uchar = 253;
pub const RT_SCOPE_HOST: c_uchar = 254;
pub const RT_SCOPE_NOWHERE: c_uchar = 255;

pub const RT_TABLE_UNSPEC: c_uchar = 0;
pub const RT_TABLE_COMPAT: c_uchar = 252;
pub const RT_TABLE_DEFAULT: c_uchar = 253;
pub const RT_TABLE_MAIN: c_uchar = 254;
pub const RT_TABLE_LOCAL: c_uchar = 255;

pub const RTMSG_OVERRUN: u32 = crate::NLMSG_OVERRUN as u32;
pub const RTMSG_NEWDEVICE: u32 = 0x11;
pub const RTMSG_DELDEVICE: u32 = 0x12;
pub const RTMSG_NEWROUTE: u32 = 0x21;
pub const RTMSG_DELROUTE: u32 = 0x22;
pub const RTMSG_NEWRULE: u32 = 0x31;
pub const RTMSG_DELRULE: u32 = 0x32;
pub const RTMSG_CONTROL: u32 = 0x40;
pub const RTMSG_AR_FAILED: u32 = 0x51;

pub const MAX_ADDR_LEN: usize = 7;
pub const ARPD_UPDATE: c_ushort = 0x01;
pub const ARPD_LOOKUP: c_ushort = 0x02;
pub const ARPD_FLUSH: c_ushort = 0x03;
pub const ATF_MAGIC: c_int = 0x80;

pub const RTEXT_FILTER_VF: c_int = 1 << 0;
pub const RTEXT_FILTER_BRVLAN: c_int = 1 << 1;
pub const RTEXT_FILTER_BRVLAN_COMPRESSED: c_int = 1 << 2;
pub const RTEXT_FILTER_SKIP_STATS: c_int = 1 << 3;
pub const RTEXT_FILTER_MRP: c_int = 1 << 4;
pub const RTEXT_FILTER_CFM_CONFIG: c_int = 1 << 5;
pub const RTEXT_FILTER_CFM_STATUS: c_int = 1 << 6;

// userspace compat definitions for RTNLGRP_*
pub const RTMGRP_LINK: c_int = 0x00001;
pub const RTMGRP_NOTIFY: c_int = 0x00002;
pub const RTMGRP_NEIGH: c_int = 0x00004;
pub const RTMGRP_TC: c_int = 0x00008;
pub const RTMGRP_IPV4_IFADDR: c_int = 0x00010;
pub const RTMGRP_IPV4_MROUTE: c_int = 0x00020;
pub const RTMGRP_IPV4_ROUTE: c_int = 0x00040;
pub const RTMGRP_IPV4_RULE: c_int = 0x00080;
pub const RTMGRP_IPV6_IFADDR: c_int = 0x00100;
pub const RTMGRP_IPV6_MROUTE: c_int = 0x00200;
pub const RTMGRP_IPV6_ROUTE: c_int = 0x00400;
pub const RTMGRP_IPV6_IFINFO: c_int = 0x00800;
pub const RTMGRP_DECnet_IFADDR: c_int = 0x01000;
pub const RTMGRP_DECnet_ROUTE: c_int = 0x04000;
pub const RTMGRP_IPV6_PREFIX: c_int = 0x20000;

// enum rtnetlink_groups
pub const RTNLGRP_NONE: c_uint = 0x00;
pub const RTNLGRP_LINK: c_uint = 0x01;
pub const RTNLGRP_NOTIFY: c_uint = 0x02;
pub const RTNLGRP_NEIGH: c_uint = 0x03;
pub const RTNLGRP_TC: c_uint = 0x04;
pub const RTNLGRP_IPV4_IFADDR: c_uint = 0x05;
pub const RTNLGRP_IPV4_MROUTE: c_uint = 0x06;
pub const RTNLGRP_IPV4_ROUTE: c_uint = 0x07;
pub const RTNLGRP_IPV4_RULE: c_uint = 0x08;
pub const RTNLGRP_IPV6_IFADDR: c_uint = 0x09;
pub const RTNLGRP_IPV6_MROUTE: c_uint = 0x0a;
pub const RTNLGRP_IPV6_ROUTE: c_uint = 0x0b;
pub const RTNLGRP_IPV6_IFINFO: c_uint = 0x0c;
pub const RTNLGRP_DECnet_IFADDR: c_uint = 0x0d;
pub const RTNLGRP_NOP2: c_uint = 0x0e;
pub const RTNLGRP_DECnet_ROUTE: c_uint = 0x0f;
pub const RTNLGRP_DECnet_RULE: c_uint = 0x10;
pub const RTNLGRP_NOP4: c_uint = 0x11;
pub const RTNLGRP_IPV6_PREFIX: c_uint = 0x12;
pub const RTNLGRP_IPV6_RULE: c_uint = 0x13;
pub const RTNLGRP_ND_USEROPT: c_uint = 0x14;
pub const RTNLGRP_PHONET_IFADDR: c_uint = 0x15;
pub const RTNLGRP_PHONET_ROUTE: c_uint = 0x16;
pub const RTNLGRP_DCB: c_uint = 0x17;
pub const RTNLGRP_IPV4_NETCONF: c_uint = 0x18;
pub const RTNLGRP_IPV6_NETCONF: c_uint = 0x19;
pub const RTNLGRP_MDB: c_uint = 0x1a;
pub const RTNLGRP_MPLS_ROUTE: c_uint = 0x1b;
pub const RTNLGRP_NSID: c_uint = 0x1c;
pub const RTNLGRP_MPLS_NETCONF: c_uint = 0x1d;
pub const RTNLGRP_IPV4_MROUTE_R: c_uint = 0x1e;
pub const RTNLGRP_IPV6_MROUTE_R: c_uint = 0x1f;
pub const RTNLGRP_NEXTHOP: c_uint = 0x20;
pub const RTNLGRP_BRVLAN: c_uint = 0x21;
pub const RTNLGRP_MCTP_IFADDR: c_uint = 0x22;
pub const RTNLGRP_TUNNEL: c_uint = 0x23;
pub const RTNLGRP_STATS: c_uint = 0x24;

// linux/cn_proc.h
c_enum! {
    proc_cn_mcast_op {
        PROC_CN_MCAST_LISTEN = 1,
        PROC_CN_MCAST_IGNORE = 2,
    }
}

c_enum! {
    proc_cn_event {
        PROC_EVENT_NONE = 0x00000000,
        PROC_EVENT_FORK = 0x00000001,
        PROC_EVENT_EXEC = 0x00000002,
        PROC_EVENT_UID = 0x00000004,
        PROC_EVENT_GID = 0x00000040,
        PROC_EVENT_SID = 0x00000080,
        PROC_EVENT_PTRACE = 0x00000100,
        PROC_EVENT_COMM = 0x00000200,
        PROC_EVENT_NONZERO_EXIT = 0x20000000,
        PROC_EVENT_COREDUMP = 0x40000000,
        PROC_EVENT_EXIT = 0x80000000,
    }
}

// linux/connector.h
pub const CN_IDX_PROC: c_uint = 0x1;
pub const CN_VAL_PROC: c_uint = 0x1;
pub const CN_IDX_CIFS: c_uint = 0x2;
pub const CN_VAL_CIFS: c_uint = 0x1;
pub const CN_W1_IDX: c_uint = 0x3;
pub const CN_W1_VAL: c_uint = 0x1;
pub const CN_IDX_V86D: c_uint = 0x4;
pub const CN_VAL_V86D_UVESAFB: c_uint = 0x1;
pub const CN_IDX_BB: c_uint = 0x5;
pub const CN_DST_IDX: c_uint = 0x6;
pub const CN_DST_VAL: c_uint = 0x1;
pub const CN_IDX_DM: c_uint = 0x7;
pub const CN_VAL_DM_USERSPACE_LOG: c_uint = 0x1;
pub const CN_IDX_DRBD: c_uint = 0x8;
pub const CN_VAL_DRBD: c_uint = 0x1;
pub const CN_KVP_IDX: c_uint = 0x9;
pub const CN_KVP_VAL: c_uint = 0x1;
pub const CN_VSS_IDX: c_uint = 0xA;
pub const CN_VSS_VAL: c_uint = 0x1;

// linux/module.h
pub const MODULE_INIT_IGNORE_MODVERSIONS: c_uint = 0x0001;
pub const MODULE_INIT_IGNORE_VERMAGIC: c_uint = 0x0002;

// linux/net_tstamp.h
pub const SOF_TIMESTAMPING_TX_HARDWARE: c_uint = 1 << 0;
pub const SOF_TIMESTAMPING_TX_SOFTWARE: c_uint = 1 << 1;
pub const SOF_TIMESTAMPING_RX_HARDWARE: c_uint = 1 << 2;
pub const SOF_TIMESTAMPING_RX_SOFTWARE: c_uint = 1 << 3;
pub const SOF_TIMESTAMPING_SOFTWARE: c_uint = 1 << 4;
pub const SOF_TIMESTAMPING_SYS_HARDWARE: c_uint = 1 << 5;
pub const SOF_TIMESTAMPING_RAW_HARDWARE: c_uint = 1 << 6;
pub const SOF_TIMESTAMPING_OPT_ID: c_uint = 1 << 7;
pub const SOF_TIMESTAMPING_TX_SCHED: c_uint = 1 << 8;
pub const SOF_TIMESTAMPING_TX_ACK: c_uint = 1 << 9;
pub const SOF_TIMESTAMPING_OPT_CMSG: c_uint = 1 << 10;
pub const SOF_TIMESTAMPING_OPT_TSONLY: c_uint = 1 << 11;
pub const SOF_TIMESTAMPING_OPT_STATS: c_uint = 1 << 12;
pub const SOF_TIMESTAMPING_OPT_PKTINFO: c_uint = 1 << 13;
pub const SOF_TIMESTAMPING_OPT_TX_SWHW: c_uint = 1 << 14;
pub const SOF_TIMESTAMPING_BIND_PHC: c_uint = 1 << 15;
pub const SOF_TIMESTAMPING_OPT_ID_TCP: c_uint = 1 << 16;
pub const SOF_TIMESTAMPING_OPT_RX_FILTER: c_uint = 1 << 17;
pub const SOF_TXTIME_DEADLINE_MODE: u32 = 1 << 0;
pub const SOF_TXTIME_REPORT_ERRORS: u32 = 1 << 1;

pub const HWTSTAMP_TX_OFF: c_uint = 0;
pub const HWTSTAMP_TX_ON: c_uint = 1;
pub const HWTSTAMP_TX_ONESTEP_SYNC: c_uint = 2;
pub const HWTSTAMP_TX_ONESTEP_P2P: c_uint = 3;

pub const HWTSTAMP_FILTER_NONE: c_uint = 0;
pub const HWTSTAMP_FILTER_ALL: c_uint = 1;
pub const HWTSTAMP_FILTER_SOME: c_uint = 2;
pub const HWTSTAMP_FILTER_PTP_V1_L4_EVENT: c_uint = 3;
pub const HWTSTAMP_FILTER_PTP_V1_L4_SYNC: c_uint = 4;
pub const HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ: c_uint = 5;
pub const HWTSTAMP_FILTER_PTP_V2_L4_EVENT: c_uint = 6;
pub const HWTSTAMP_FILTER_PTP_V2_L4_SYNC: c_uint = 7;
pub const HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ: c_uint = 8;
pub const HWTSTAMP_FILTER_PTP_V2_L2_EVENT: c_uint = 9;
pub const HWTSTAMP_FILTER_PTP_V2_L2_SYNC: c_uint = 10;
pub const HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ: c_uint = 11;
pub const HWTSTAMP_FILTER_PTP_V2_EVENT: c_uint = 12;
pub const HWTSTAMP_FILTER_PTP_V2_SYNC: c_uint = 13;
pub const HWTSTAMP_FILTER_PTP_V2_DELAY_REQ: c_uint = 14;
pub const HWTSTAMP_FILTER_NTP_ALL: c_uint = 15;

// linux/ptp_clock.h
pub const PTP_MAX_SAMPLES: c_uint = 25; // Maximum allowed offset measurement samples.

const PTP_CLK_MAGIC: u32 = b'=' as u32;

pub const PTP_CLOCK_GETCAPS: Ioctl = _IOR::<ptp_clock_caps>(PTP_CLK_MAGIC, 1);
pub const PTP_EXTTS_REQUEST: Ioctl = _IOW::<ptp_extts_request>(PTP_CLK_MAGIC, 2);
pub const PTP_PEROUT_REQUEST: Ioctl = _IOW::<ptp_perout_request>(PTP_CLK_MAGIC, 3);
pub const PTP_ENABLE_PPS: Ioctl = _IOW::<c_int>(PTP_CLK_MAGIC, 4);
pub const PTP_SYS_OFFSET: Ioctl = _IOW::<ptp_sys_offset>(PTP_CLK_MAGIC, 5);
pub const PTP_PIN_GETFUNC: Ioctl = _IOWR::<ptp_pin_desc>(PTP_CLK_MAGIC, 6);
pub const PTP_PIN_SETFUNC: Ioctl = _IOW::<ptp_pin_desc>(PTP_CLK_MAGIC, 7);
pub const PTP_SYS_OFFSET_PRECISE: Ioctl = _IOWR::<ptp_sys_offset_precise>(PTP_CLK_MAGIC, 8);
pub const PTP_SYS_OFFSET_EXTENDED: Ioctl = _IOWR::<ptp_sys_offset_extended>(PTP_CLK_MAGIC, 9);

pub const PTP_CLOCK_GETCAPS2: Ioctl = _IOR::<ptp_clock_caps>(PTP_CLK_MAGIC, 10);
pub const PTP_EXTTS_REQUEST2: Ioctl = _IOW::<ptp_extts_request>(PTP_CLK_MAGIC, 11);
pub const PTP_PEROUT_REQUEST2: Ioctl = _IOW::<ptp_perout_request>(PTP_CLK_MAGIC, 12);
pub const PTP_ENABLE_PPS2: Ioctl = _IOW::<c_int>(PTP_CLK_MAGIC, 13);
pub const PTP_SYS_OFFSET2: Ioctl = _IOW::<ptp_sys_offset>(PTP_CLK_MAGIC, 14);
pub const PTP_PIN_GETFUNC2: Ioctl = _IOWR::<ptp_pin_desc>(PTP_CLK_MAGIC, 15);
pub const PTP_PIN_SETFUNC2: Ioctl = _IOW::<ptp_pin_desc>(PTP_CLK_MAGIC, 16);
pub const PTP_SYS_OFFSET_PRECISE2: Ioctl = _IOWR::<ptp_sys_offset_precise>(PTP_CLK_MAGIC, 17);
pub const PTP_SYS_OFFSET_EXTENDED2: Ioctl = _IOWR::<ptp_sys_offset_extended>(PTP_CLK_MAGIC, 18);

// enum ptp_pin_function
pub const PTP_PF_NONE: c_uint = 0;
pub const PTP_PF_EXTTS: c_uint = 1;
pub const PTP_PF_PEROUT: c_uint = 2;
pub const PTP_PF_PHYSYNC: c_uint = 3;

// linux/tls.h
pub const TLS_TX: c_int = 1;
pub const TLS_RX: c_int = 2;

pub const TLS_TX_ZEROCOPY_RO: c_int = 3;
pub const TLS_RX_EXPECT_NO_PAD: c_int = 4;

pub const TLS_1_2_VERSION_MAJOR: __u8 = 0x3;
pub const TLS_1_2_VERSION_MINOR: __u8 = 0x3;
pub const TLS_1_2_VERSION: __u16 =
    ((TLS_1_2_VERSION_MAJOR as __u16) << 8) | (TLS_1_2_VERSION_MINOR as __u16);

pub const TLS_1_3_VERSION_MAJOR: __u8 = 0x3;
pub const TLS_1_3_VERSION_MINOR: __u8 = 0x4;
pub const TLS_1_3_VERSION: __u16 =
    ((TLS_1_3_VERSION_MAJOR as __u16) << 8) | (TLS_1_3_VERSION_MINOR as __u16);

pub const TLS_CIPHER_AES_GCM_128: __u16 = 51;
pub const TLS_CIPHER_AES_GCM_128_IV_SIZE: usize = 8;
pub const TLS_CIPHER_AES_GCM_128_KEY_SIZE: usize = 16;
pub const TLS_CIPHER_AES_GCM_128_SALT_SIZE: usize = 4;
pub const TLS_CIPHER_AES_GCM_128_TAG_SIZE: usize = 16;
pub const TLS_CIPHER_AES_GCM_128_REC_SEQ_SIZE: usize = 8;

pub const TLS_CIPHER_AES_GCM_256: __u16 = 52;
pub const TLS_CIPHER_AES_GCM_256_IV_SIZE: usize = 8;
pub const TLS_CIPHER_AES_GCM_256_KEY_SIZE: usize = 32;
pub const TLS_CIPHER_AES_GCM_256_SALT_SIZE: usize = 4;
pub const TLS_CIPHER_AES_GCM_256_TAG_SIZE: usize = 16;
pub const TLS_CIPHER_AES_GCM_256_REC_SEQ_SIZE: usize = 8;

pub const TLS_CIPHER_AES_CCM_128: __u16 = 53;
pub const TLS_CIPHER_AES_CCM_128_IV_SIZE: usize = 8;
pub const TLS_CIPHER_AES_CCM_128_KEY_SIZE: usize = 16;
pub const TLS_CIPHER_AES_CCM_128_SALT_SIZE: usize = 4;
pub const TLS_CIPHER_AES_CCM_128_TAG_SIZE: usize = 16;
pub const TLS_CIPHER_AES_CCM_128_REC_SEQ_SIZE: usize = 8;

pub const TLS_CIPHER_CHACHA20_POLY1305: __u16 = 54;
pub const TLS_CIPHER_CHACHA20_POLY1305_IV_SIZE: usize = 12;
pub const TLS_CIPHER_CHACHA20_POLY1305_KEY_SIZE: usize = 32;
pub const TLS_CIPHER_CHACHA20_POLY1305_SALT_SIZE: usize = 0;
pub const TLS_CIPHER_CHACHA20_POLY1305_TAG_SIZE: usize = 16;
pub const TLS_CIPHER_CHACHA20_POLY1305_REC_SEQ_SIZE: usize = 8;

pub const TLS_CIPHER_SM4_GCM: __u16 = 55;
pub const TLS_CIPHER_SM4_GCM_IV_SIZE: usize = 8;
pub const TLS_CIPHER_SM4_GCM_KEY_SIZE: usize = 16;
pub const TLS_CIPHER_SM4_GCM_SALT_SIZE: usize = 4;
pub const TLS_CIPHER_SM4_GCM_TAG_SIZE: usize = 16;
pub const TLS_CIPHER_SM4_GCM_REC_SEQ_SIZE: usize = 8;

pub const TLS_CIPHER_SM4_CCM: __u16 = 56;
pub const TLS_CIPHER_SM4_CCM_IV_SIZE: usize = 8;
pub const TLS_CIPHER_SM4_CCM_KEY_SIZE: usize = 16;
pub const TLS_CIPHER_SM4_CCM_SALT_SIZE: usize = 4;
pub const TLS_CIPHER_SM4_CCM_TAG_SIZE: usize = 16;
pub const TLS_CIPHER_SM4_CCM_REC_SEQ_SIZE: usize = 8;

pub const TLS_CIPHER_ARIA_GCM_128: __u16 = 57;
pub const TLS_CIPHER_ARIA_GCM_128_IV_SIZE: usize = 8;
pub const TLS_CIPHER_ARIA_GCM_128_KEY_SIZE: usize = 16;
pub const TLS_CIPHER_ARIA_GCM_128_SALT_SIZE: usize = 4;
pub const TLS_CIPHER_ARIA_GCM_128_TAG_SIZE: usize = 16;
pub const TLS_CIPHER_ARIA_GCM_128_REC_SEQ_SIZE: usize = 8;

pub const TLS_CIPHER_ARIA_GCM_256: __u16 = 58;
pub const TLS_CIPHER_ARIA_GCM_256_IV_SIZE: usize = 8;
pub const TLS_CIPHER_ARIA_GCM_256_KEY_SIZE: usize = 32;
pub const TLS_CIPHER_ARIA_GCM_256_SALT_SIZE: usize = 4;
pub const TLS_CIPHER_ARIA_GCM_256_TAG_SIZE: usize = 16;
pub const TLS_CIPHER_ARIA_GCM_256_REC_SEQ_SIZE: usize = 8;

pub const TLS_SET_RECORD_TYPE: c_int = 1;
pub const TLS_GET_RECORD_TYPE: c_int = 2;

pub const SOL_TLS: c_int = 282;

// enum
pub const TLS_INFO_UNSPEC: c_int = 0x00;
pub const TLS_INFO_VERSION: c_int = 0x01;
pub const TLS_INFO_CIPHER: c_int = 0x02;
pub const TLS_INFO_TXCONF: c_int = 0x03;
pub const TLS_INFO_RXCONF: c_int = 0x04;
pub const TLS_INFO_ZC_RO_TX: c_int = 0x05;
pub const TLS_INFO_RX_NO_PAD: c_int = 0x06;

pub const TLS_CONF_BASE: c_int = 1;
pub const TLS_CONF_SW: c_int = 2;
pub const TLS_CONF_HW: c_int = 3;
pub const TLS_CONF_HW_RECORD: c_int = 4;

// linux/if_alg.h
pub const ALG_SET_KEY: c_int = 1;
pub const ALG_SET_IV: c_int = 2;
pub const ALG_SET_OP: c_int = 3;
pub const ALG_SET_AEAD_ASSOCLEN: c_int = 4;
pub const ALG_SET_AEAD_AUTHSIZE: c_int = 5;
pub const ALG_SET_DRBG_ENTROPY: c_int = 6;
pub const ALG_SET_KEY_BY_KEY_SERIAL: c_int = 7;

pub const ALG_OP_DECRYPT: c_int = 0;
pub const ALG_OP_ENCRYPT: c_int = 1;

// include/uapi/linux/if.h
pub const IF_OPER_UNKNOWN: c_int = 0;
pub const IF_OPER_NOTPRESENT: c_int = 1;
pub const IF_OPER_DOWN: c_int = 2;
pub const IF_OPER_LOWERLAYERDOWN: c_int = 3;
pub const IF_OPER_TESTING: c_int = 4;
pub const IF_OPER_DORMANT: c_int = 5;
pub const IF_OPER_UP: c_int = 6;

pub const IF_LINK_MODE_DEFAULT: c_int = 0;
pub const IF_LINK_MODE_DORMANT: c_int = 1;
pub const IF_LINK_MODE_TESTING: c_int = 2;

// include/uapi/linux/udp.h
pub const UDP_CORK: c_int = 1;
pub const UDP_ENCAP: c_int = 100;
pub const UDP_NO_CHECK6_TX: c_int = 101;
pub const UDP_NO_CHECK6_RX: c_int = 102;

// include/uapi/linux/mman.h
pub const MAP_SHARED_VALIDATE: c_int = 0x3;
pub const MAP_DROPPABLE: c_int = 0x8;

// include/uapi/asm-generic/mman-common.h
pub const MAP_FIXED_NOREPLACE: c_int = 0x100000;
pub const MLOCK_ONFAULT: c_uint = 0x01;

// uapi/linux/vm_sockets.h
pub const VMADDR_CID_ANY: c_uint = 0xFFFFFFFF;
pub const VMADDR_CID_HYPERVISOR: c_uint = 0;
#[deprecated(
    since = "0.2.74",
    note = "VMADDR_CID_RESERVED is removed since Linux v5.6 and \
            replaced with VMADDR_CID_LOCAL"
)]
pub const VMADDR_CID_RESERVED: c_uint = 1;
pub const VMADDR_CID_LOCAL: c_uint = 1;
pub const VMADDR_CID_HOST: c_uint = 2;
pub const VMADDR_PORT_ANY: c_uint = 0xFFFFFFFF;

// uapi/linux/inotify.h
pub const IN_ACCESS: u32 = 0x0000_0001;
pub const IN_MODIFY: u32 = 0x0000_0002;
pub const IN_ATTRIB: u32 = 0x0000_0004;
pub const IN_CLOSE_WRITE: u32 = 0x0000_0008;
pub const IN_CLOSE_NOWRITE: u32 = 0x0000_0010;
pub const IN_CLOSE: u32 = IN_CLOSE_WRITE | IN_CLOSE_NOWRITE;
pub const IN_OPEN: u32 = 0x0000_0020;
pub const IN_MOVED_FROM: u32 = 0x0000_0040;
pub const IN_MOVED_TO: u32 = 0x0000_0080;
pub const IN_MOVE: u32 = IN_MOVED_FROM | IN_MOVED_TO;
pub const IN_CREATE: u32 = 0x0000_0100;
pub const IN_DELETE: u32 = 0x0000_0200;
pub const IN_DELETE_SELF: u32 = 0x0000_0400;
pub const IN_MOVE_SELF: u32 = 0x0000_0800;
pub const IN_UNMOUNT: u32 = 0x0000_2000;
pub const IN_Q_OVERFLOW: u32 = 0x0000_4000;
pub const IN_IGNORED: u32 = 0x0000_8000;
pub const IN_ONLYDIR: u32 = 0x0100_0000;
pub const IN_DONT_FOLLOW: u32 = 0x0200_0000;
pub const IN_EXCL_UNLINK: u32 = 0x0400_0000;

// linux/keyctl.h
pub const KEY_SPEC_THREAD_KEYRING: i32 = -1;
pub const KEY_SPEC_PROCESS_KEYRING: i32 = -2;
pub const KEY_SPEC_SESSION_KEYRING: i32 = -3;
pub const KEY_SPEC_USER_KEYRING: i32 = -4;
pub const KEY_SPEC_USER_SESSION_KEYRING: i32 = -5;
pub const KEY_SPEC_GROUP_KEYRING: i32 = -6;
pub const KEY_SPEC_REQKEY_AUTH_KEY: i32 = -7;
pub const KEY_SPEC_REQUESTOR_KEYRING: i32 = -8;

pub const KEY_REQKEY_DEFL_NO_CHANGE: i32 = -1;
pub const KEY_REQKEY_DEFL_DEFAULT: i32 = 0;
pub const KEY_REQKEY_DEFL_THREAD_KEYRING: i32 = 1;
pub const KEY_REQKEY_DEFL_PROCESS_KEYRING: i32 = 2;
pub const KEY_REQKEY_DEFL_SESSION_KEYRING: i32 = 3;
pub const KEY_REQKEY_DEFL_USER_KEYRING: i32 = 4;
pub const KEY_REQKEY_DEFL_USER_SESSION_KEYRING: i32 = 5;
pub const KEY_REQKEY_DEFL_GROUP_KEYRING: i32 = 6;
pub const KEY_REQKEY_DEFL_REQUESTOR_KEYRING: i32 = 7;

pub const KEYCTL_GET_KEYRING_ID: u32 = 0;
pub const KEYCTL_JOIN_SESSION_KEYRING: u32 = 1;
pub const KEYCTL_UPDATE: u32 = 2;
pub const KEYCTL_REVOKE: u32 = 3;
pub const KEYCTL_CHOWN: u32 = 4;
pub const KEYCTL_SETPERM: u32 = 5;
pub const KEYCTL_DESCRIBE: u32 = 6;
pub const KEYCTL_CLEAR: u32 = 7;
pub const KEYCTL_LINK: u32 = 8;
pub const KEYCTL_UNLINK: u32 = 9;
pub const KEYCTL_SEARCH: u32 = 10;
pub const KEYCTL_READ: u32 = 11;
pub const KEYCTL_INSTANTIATE: u32 = 12;
pub const KEYCTL_NEGATE: u32 = 13;
pub const KEYCTL_SET_REQKEY_KEYRING: u32 = 14;
pub const KEYCTL_SET_TIMEOUT: u32 = 15;
pub const KEYCTL_ASSUME_AUTHORITY: u32 = 16;
pub const KEYCTL_GET_SECURITY: u32 = 17;
pub const KEYCTL_SESSION_TO_PARENT: u32 = 18;
pub const KEYCTL_REJECT: u32 = 19;
pub const KEYCTL_INSTANTIATE_IOV: u32 = 20;
pub const KEYCTL_INVALIDATE: u32 = 21;
pub const KEYCTL_GET_PERSISTENT: u32 = 22;

pub const IN_MASK_CREATE: u32 = 0x1000_0000;
pub const IN_MASK_ADD: u32 = 0x2000_0000;
pub const IN_ISDIR: u32 = 0x4000_0000;
pub const IN_ONESHOT: u32 = 0x8000_0000;

pub const IN_ALL_EVENTS: u32 = IN_ACCESS
    | IN_MODIFY
    | IN_ATTRIB
    | IN_CLOSE_WRITE
    | IN_CLOSE_NOWRITE
    | IN_OPEN
    | IN_MOVED_FROM
    | IN_MOVED_TO
    | IN_DELETE
    | IN_CREATE
    | IN_DELETE_SELF
    | IN_MOVE_SELF;

pub const IN_CLOEXEC: c_int = O_CLOEXEC;
pub const IN_NONBLOCK: c_int = O_NONBLOCK;

// uapi/linux/mount.h
pub const OPEN_TREE_CLONE: c_uint = 0x01;
pub const OPEN_TREE_CLOEXEC: c_uint = O_CLOEXEC as c_uint;

// uapi/linux/netfilter/nf_tables.h
pub const NFT_TABLE_MAXNAMELEN: c_int = 256;
pub const NFT_CHAIN_MAXNAMELEN: c_int = 256;
pub const NFT_SET_MAXNAMELEN: c_int = 256;
pub const NFT_OBJ_MAXNAMELEN: c_int = 256;
pub const NFT_USERDATA_MAXLEN: c_int = 256;

pub const NFT_REG_VERDICT: c_int = 0;
pub const NFT_REG_1: c_int = 1;
pub const NFT_REG_2: c_int = 2;
pub const NFT_REG_3: c_int = 3;
pub const NFT_REG_4: c_int = 4;
pub const __NFT_REG_MAX: c_int = 5;
pub const NFT_REG32_00: c_int = 8;
pub const NFT_REG32_01: c_int = 9;
pub const NFT_REG32_02: c_int = 10;
pub const NFT_REG32_03: c_int = 11;
pub const NFT_REG32_04: c_int = 12;
pub const NFT_REG32_05: c_int = 13;
pub const NFT_REG32_06: c_int = 14;
pub const NFT_REG32_07: c_int = 15;
pub const NFT_REG32_08: c_int = 16;
pub const NFT_REG32_09: c_int = 17;
pub const NFT_REG32_10: c_int = 18;
pub const NFT_REG32_11: c_int = 19;
pub const NFT_REG32_12: c_int = 20;
pub const NFT_REG32_13: c_int = 21;
pub const NFT_REG32_14: c_int = 22;
pub const NFT_REG32_15: c_int = 23;

pub const NFT_REG_SIZE: c_int = 16;
pub const NFT_REG32_SIZE: c_int = 4;

pub const NFT_CONTINUE: c_int = -1;
pub const NFT_BREAK: c_int = -2;
pub const NFT_JUMP: c_int = -3;
pub const NFT_GOTO: c_int = -4;
pub const NFT_RETURN: c_int = -5;

pub const NFT_MSG_NEWTABLE: c_int = 0;
pub const NFT_MSG_GETTABLE: c_int = 1;
pub const NFT_MSG_DELTABLE: c_int = 2;
pub const NFT_MSG_NEWCHAIN: c_int = 3;
pub const NFT_MSG_GETCHAIN: c_int = 4;
pub const NFT_MSG_DELCHAIN: c_int = 5;
pub const NFT_MSG_NEWRULE: c_int = 6;
pub const NFT_MSG_GETRULE: c_int = 7;
pub const NFT_MSG_DELRULE: c_int = 8;
pub const NFT_MSG_NEWSET: c_int = 9;
pub const NFT_MSG_GETSET: c_int = 10;
pub const NFT_MSG_DELSET: c_int = 11;
pub const NFT_MSG_NEWSETELEM: c_int = 12;
pub const NFT_MSG_GETSETELEM: c_int = 13;
pub const NFT_MSG_DELSETELEM: c_int = 14;
pub const NFT_MSG_NEWGEN: c_int = 15;
pub const NFT_MSG_GETGEN: c_int = 16;
pub const NFT_MSG_TRACE: c_int = 17;
cfg_if! {
    if #[cfg(not(target_arch = "sparc64"))] {
        pub const NFT_MSG_NEWOBJ: c_int = 18;
        pub const NFT_MSG_GETOBJ: c_int = 19;
        pub const NFT_MSG_DELOBJ: c_int = 20;
        pub const NFT_MSG_GETOBJ_RESET: c_int = 21;
    }
}
pub const NFT_MSG_MAX: c_int = 25;

pub const NFT_SET_ANONYMOUS: c_int = 0x1;
pub const NFT_SET_CONSTANT: c_int = 0x2;
pub const NFT_SET_INTERVAL: c_int = 0x4;
pub const NFT_SET_MAP: c_int = 0x8;
pub const NFT_SET_TIMEOUT: c_int = 0x10;
pub const NFT_SET_EVAL: c_int = 0x20;

pub const NFT_SET_POL_PERFORMANCE: c_int = 0;
pub const NFT_SET_POL_MEMORY: c_int = 1;

pub const NFT_SET_ELEM_INTERVAL_END: c_int = 0x1;

pub const NFT_DATA_VALUE: c_uint = 0;
pub const NFT_DATA_VERDICT: c_uint = 0xffffff00;

pub const NFT_DATA_RESERVED_MASK: c_uint = 0xffffff00;

pub const NFT_DATA_VALUE_MAXLEN: c_int = 64;

pub const NFT_BYTEORDER_NTOH: c_int = 0;
pub const NFT_BYTEORDER_HTON: c_int = 1;

pub const NFT_CMP_EQ: c_int = 0;
pub const NFT_CMP_NEQ: c_int = 1;
pub const NFT_CMP_LT: c_int = 2;
pub const NFT_CMP_LTE: c_int = 3;
pub const NFT_CMP_GT: c_int = 4;
pub const NFT_CMP_GTE: c_int = 5;

pub const NFT_RANGE_EQ: c_int = 0;
pub const NFT_RANGE_NEQ: c_int = 1;

pub const NFT_LOOKUP_F_INV: c_int = 1 << 0;

pub const NFT_DYNSET_OP_ADD: c_int = 0;
pub const NFT_DYNSET_OP_UPDATE: c_int = 1;

pub const NFT_DYNSET_F_INV: c_int = 1 << 0;

pub const NFT_PAYLOAD_LL_HEADER: c_int = 0;
pub const NFT_PAYLOAD_NETWORK_HEADER: c_int = 1;
pub const NFT_PAYLOAD_TRANSPORT_HEADER: c_int = 2;

pub const NFT_PAYLOAD_CSUM_NONE: c_int = 0;
pub const NFT_PAYLOAD_CSUM_INET: c_int = 1;

pub const NFT_META_LEN: c_int = 0;
pub const NFT_META_PROTOCOL: c_int = 1;
pub const NFT_META_PRIORITY: c_int = 2;
pub const NFT_META_MARK: c_int = 3;
pub const NFT_META_IIF: c_int = 4;
pub const NFT_META_OIF: c_int = 5;
pub const NFT_META_IIFNAME: c_int = 6;
pub const NFT_META_OIFNAME: c_int = 7;
pub const NFT_META_IIFTYPE: c_int = 8;
pub const NFT_META_OIFTYPE: c_int = 9;
pub const NFT_META_SKUID: c_int = 10;
pub const NFT_META_SKGID: c_int = 11;
pub const NFT_META_NFTRACE: c_int = 12;
pub const NFT_META_RTCLASSID: c_int = 13;
pub const NFT_META_SECMARK: c_int = 14;
pub const NFT_META_NFPROTO: c_int = 15;
pub const NFT_META_L4PROTO: c_int = 16;
pub const NFT_META_BRI_IIFNAME: c_int = 17;
pub const NFT_META_BRI_OIFNAME: c_int = 18;
pub const NFT_META_PKTTYPE: c_int = 19;
pub const NFT_META_CPU: c_int = 20;
pub const NFT_META_IIFGROUP: c_int = 21;
pub const NFT_META_OIFGROUP: c_int = 22;
pub const NFT_META_CGROUP: c_int = 23;
pub const NFT_META_PRANDOM: c_int = 24;

pub const NFT_CT_STATE: c_int = 0;
pub const NFT_CT_DIRECTION: c_int = 1;
pub const NFT_CT_STATUS: c_int = 2;
pub const NFT_CT_MARK: c_int = 3;
pub const NFT_CT_SECMARK: c_int = 4;
pub const NFT_CT_EXPIRATION: c_int = 5;
pub const NFT_CT_HELPER: c_int = 6;
pub const NFT_CT_L3PROTOCOL: c_int = 7;
pub const NFT_CT_SRC: c_int = 8;
pub const NFT_CT_DST: c_int = 9;
pub const NFT_CT_PROTOCOL: c_int = 10;
pub const NFT_CT_PROTO_SRC: c_int = 11;
pub const NFT_CT_PROTO_DST: c_int = 12;
pub const NFT_CT_LABELS: c_int = 13;
pub const NFT_CT_PKTS: c_int = 14;
pub const NFT_CT_BYTES: c_int = 15;
pub const NFT_CT_AVGPKT: c_int = 16;
pub const NFT_CT_ZONE: c_int = 17;
pub const NFT_CT_EVENTMASK: c_int = 18;
pub const NFT_CT_SRC_IP: c_int = 19;
pub const NFT_CT_DST_IP: c_int = 20;
pub const NFT_CT_SRC_IP6: c_int = 21;
pub const NFT_CT_DST_IP6: c_int = 22;

pub const NFT_LIMIT_PKTS: c_int = 0;
pub const NFT_LIMIT_PKT_BYTES: c_int = 1;

pub const NFT_LIMIT_F_INV: c_int = 1 << 0;

pub const NFT_QUEUE_FLAG_BYPASS: c_int = 0x01;
pub const NFT_QUEUE_FLAG_CPU_FANOUT: c_int = 0x02;
pub const NFT_QUEUE_FLAG_MASK: c_int = 0x03;

pub const NFT_QUOTA_F_INV: c_int = 1 << 0;

pub const NFT_REJECT_ICMP_UNREACH: c_int = 0;
pub const NFT_REJECT_TCP_RST: c_int = 1;
pub const NFT_REJECT_ICMPX_UNREACH: c_int = 2;

pub const NFT_REJECT_ICMPX_NO_ROUTE: c_int = 0;
pub const NFT_REJECT_ICMPX_PORT_UNREACH: c_int = 1;
pub const NFT_REJECT_ICMPX_HOST_UNREACH: c_int = 2;
pub const NFT_REJECT_ICMPX_ADMIN_PROHIBITED: c_int = 3;

pub const NFT_NAT_SNAT: c_int = 0;
pub const NFT_NAT_DNAT: c_int = 1;

pub const NFT_TRACETYPE_UNSPEC: c_int = 0;
pub const NFT_TRACETYPE_POLICY: c_int = 1;
pub const NFT_TRACETYPE_RETURN: c_int = 2;
pub const NFT_TRACETYPE_RULE: c_int = 3;

pub const NFT_NG_INCREMENTAL: c_int = 0;
pub const NFT_NG_RANDOM: c_int = 1;

// linux/input.h
pub const FF_MAX: __u16 = 0x7f;
pub const FF_CNT: usize = FF_MAX as usize + 1;

// linux/input-event-codes.h
pub const INPUT_PROP_POINTER: __u16 = 0x00;
pub const INPUT_PROP_DIRECT: __u16 = 0x01;
pub const INPUT_PROP_BUTTONPAD: __u16 = 0x02;
pub const INPUT_PROP_SEMI_MT: __u16 = 0x03;
pub const INPUT_PROP_TOPBUTTONPAD: __u16 = 0x04;
pub const INPUT_PROP_POINTING_STICK: __u16 = 0x05;
pub const INPUT_PROP_ACCELEROMETER: __u16 = 0x06;
pub const INPUT_PROP_MAX: __u16 = 0x1f;
pub const INPUT_PROP_CNT: usize = INPUT_PROP_MAX as usize + 1;
pub const EV_MAX: __u16 = 0x1f;
pub const EV_CNT: usize = EV_MAX as usize + 1;
pub const SYN_MAX: __u16 = 0xf;
pub const SYN_CNT: usize = SYN_MAX as usize + 1;
pub const KEY_MAX: __u16 = 0x2ff;
pub const KEY_CNT: usize = KEY_MAX as usize + 1;
pub const REL_MAX: __u16 = 0x0f;
pub const REL_CNT: usize = REL_MAX as usize + 1;
pub const ABS_MAX: __u16 = 0x3f;
pub const ABS_CNT: usize = ABS_MAX as usize + 1;
pub const SW_MAX: __u16 = 0x10;
pub const SW_CNT: usize = SW_MAX as usize + 1;
pub const MSC_MAX: __u16 = 0x07;
pub const MSC_CNT: usize = MSC_MAX as usize + 1;
pub const LED_MAX: __u16 = 0x0f;
pub const LED_CNT: usize = LED_MAX as usize + 1;
pub const REP_MAX: __u16 = 0x01;
pub const REP_CNT: usize = REP_MAX as usize + 1;
pub const SND_MAX: __u16 = 0x07;
pub const SND_CNT: usize = SND_MAX as usize + 1;

// linux/uinput.h
pub const UINPUT_VERSION: c_uint = 5;
pub const UINPUT_MAX_NAME_SIZE: usize = 80;

// uapi/linux/fanotify.h
pub const FAN_ACCESS: u64 = 0x0000_0001;
pub const FAN_MODIFY: u64 = 0x0000_0002;
pub const FAN_ATTRIB: u64 = 0x0000_0004;
pub const FAN_CLOSE_WRITE: u64 = 0x0000_0008;
pub const FAN_CLOSE_NOWRITE: u64 = 0x0000_0010;
pub const FAN_OPEN: u64 = 0x0000_0020;
pub const FAN_MOVED_FROM: u64 = 0x0000_0040;
pub const FAN_MOVED_TO: u64 = 0x0000_0080;
pub const FAN_CREATE: u64 = 0x0000_0100;
pub const FAN_DELETE: u64 = 0x0000_0200;
pub const FAN_DELETE_SELF: u64 = 0x0000_0400;
pub const FAN_MOVE_SELF: u64 = 0x0000_0800;
pub const FAN_OPEN_EXEC: u64 = 0x0000_1000;

pub const FAN_Q_OVERFLOW: u64 = 0x0000_4000;
pub const FAN_FS_ERROR: u64 = 0x0000_8000;

pub const FAN_OPEN_PERM: u64 = 0x0001_0000;
pub const FAN_ACCESS_PERM: u64 = 0x0002_0000;
pub const FAN_OPEN_EXEC_PERM: u64 = 0x0004_0000;

pub const FAN_EVENT_ON_CHILD: u64 = 0x0800_0000;

pub const FAN_RENAME: u64 = 0x1000_0000;

pub const FAN_ONDIR: u64 = 0x4000_0000;

pub const FAN_CLOSE: u64 = FAN_CLOSE_WRITE | FAN_CLOSE_NOWRITE;
pub const FAN_MOVE: u64 = FAN_MOVED_FROM | FAN_MOVED_TO;

pub const FAN_CLOEXEC: c_uint = 0x0000_0001;
pub const FAN_NONBLOCK: c_uint = 0x0000_0002;

pub const FAN_CLASS_NOTIF: c_uint = 0x0000_0000;
pub const FAN_CLASS_CONTENT: c_uint = 0x0000_0004;
pub const FAN_CLASS_PRE_CONTENT: c_uint = 0x0000_0008;

pub const FAN_UNLIMITED_QUEUE: c_uint = 0x0000_0010;
pub const FAN_UNLIMITED_MARKS: c_uint = 0x0000_0020;
pub const FAN_ENABLE_AUDIT: c_uint = 0x0000_0040;

pub const FAN_REPORT_PIDFD: c_uint = 0x0000_0080;
pub const FAN_REPORT_TID: c_uint = 0x0000_0100;
pub const FAN_REPORT_FID: c_uint = 0x0000_0200;
pub const FAN_REPORT_DIR_FID: c_uint = 0x0000_0400;
pub const FAN_REPORT_NAME: c_uint = 0x0000_0800;
pub const FAN_REPORT_TARGET_FID: c_uint = 0x0000_1000;

pub const FAN_REPORT_DFID_NAME: c_uint = FAN_REPORT_DIR_FID | FAN_REPORT_NAME;
pub const FAN_REPORT_DFID_NAME_TARGET: c_uint =
    FAN_REPORT_DFID_NAME | FAN_REPORT_FID | FAN_REPORT_TARGET_FID;

pub const FAN_MARK_ADD: c_uint = 0x0000_0001;
pub const FAN_MARK_REMOVE: c_uint = 0x0000_0002;
pub const FAN_MARK_DONT_FOLLOW: c_uint = 0x0000_0004;
pub const FAN_MARK_ONLYDIR: c_uint = 0x0000_0008;
pub const FAN_MARK_IGNORED_MASK: c_uint = 0x0000_0020;
pub const FAN_MARK_IGNORED_SURV_MODIFY: c_uint = 0x0000_0040;
pub const FAN_MARK_FLUSH: c_uint = 0x0000_0080;
pub const FAN_MARK_EVICTABLE: c_uint = 0x0000_0200;
pub const FAN_MARK_IGNORE: c_uint = 0x0000_0400;

pub const FAN_MARK_INODE: c_uint = 0x0000_0000;
pub const FAN_MARK_MOUNT: c_uint = 0x0000_0010;
pub const FAN_MARK_FILESYSTEM: c_uint = 0x0000_0100;

pub const FAN_MARK_IGNORE_SURV: c_uint = FAN_MARK_IGNORE | FAN_MARK_IGNORED_SURV_MODIFY;

pub const FANOTIFY_METADATA_VERSION: u8 = 3;

pub const FAN_EVENT_INFO_TYPE_FID: u8 = 1;
pub const FAN_EVENT_INFO_TYPE_DFID_NAME: u8 = 2;
pub const FAN_EVENT_INFO_TYPE_DFID: u8 = 3;
pub const FAN_EVENT_INFO_TYPE_PIDFD: u8 = 4;
pub const FAN_EVENT_INFO_TYPE_ERROR: u8 = 5;

pub const FAN_EVENT_INFO_TYPE_OLD_DFID_NAME: u8 = 10;
pub const FAN_EVENT_INFO_TYPE_NEW_DFID_NAME: u8 = 12;

pub const FAN_RESPONSE_INFO_NONE: u8 = 0;
pub const FAN_RESPONSE_INFO_AUDIT_RULE: u8 = 1;

pub const FAN_ALLOW: u32 = 0x01;
pub const FAN_DENY: u32 = 0x02;
pub const FAN_AUDIT: u32 = 0x10;
pub const FAN_INFO: u32 = 0x20;

pub const FAN_NOFD: c_int = -1;
pub const FAN_NOPIDFD: c_int = FAN_NOFD;
pub const FAN_EPIDFD: c_int = -2;

// linux/futex.h
pub const FUTEX_WAIT: c_int = 0;
pub const FUTEX_WAKE: c_int = 1;
pub const FUTEX_FD: c_int = 2;
pub const FUTEX_REQUEUE: c_int = 3;
pub const FUTEX_CMP_REQUEUE: c_int = 4;
pub const FUTEX_WAKE_OP: c_int = 5;
pub const FUTEX_LOCK_PI: c_int = 6;
pub const FUTEX_UNLOCK_PI: c_int = 7;
pub const FUTEX_TRYLOCK_PI: c_int = 8;
pub const FUTEX_WAIT_BITSET: c_int = 9;
pub const FUTEX_WAKE_BITSET: c_int = 10;
pub const FUTEX_WAIT_REQUEUE_PI: c_int = 11;
pub const FUTEX_CMP_REQUEUE_PI: c_int = 12;
pub const FUTEX_LOCK_PI2: c_int = 13;

pub const FUTEX_PRIVATE_FLAG: c_int = 128;
pub const FUTEX_CLOCK_REALTIME: c_int = 256;
pub const FUTEX_CMD_MASK: c_int = !(FUTEX_PRIVATE_FLAG | FUTEX_CLOCK_REALTIME);

pub const FUTEX_WAITERS: u32 = 0x80000000;
pub const FUTEX_OWNER_DIED: u32 = 0x40000000;
pub const FUTEX_TID_MASK: u32 = 0x3fffffff;

pub const FUTEX_BITSET_MATCH_ANY: c_int = 0xffffffff;

pub const FUTEX_OP_SET: c_int = 0;
pub const FUTEX_OP_ADD: c_int = 1;
pub const FUTEX_OP_OR: c_int = 2;
pub const FUTEX_OP_ANDN: c_int = 3;
pub const FUTEX_OP_XOR: c_int = 4;

pub const FUTEX_OP_OPARG_SHIFT: c_int = 8;

pub const FUTEX_OP_CMP_EQ: c_int = 0;
pub const FUTEX_OP_CMP_NE: c_int = 1;
pub const FUTEX_OP_CMP_LT: c_int = 2;
pub const FUTEX_OP_CMP_LE: c_int = 3;
pub const FUTEX_OP_CMP_GT: c_int = 4;
pub const FUTEX_OP_CMP_GE: c_int = 5;

pub fn FUTEX_OP(op: c_int, oparg: c_int, cmp: c_int, cmparg: c_int) -> c_int {
    ((op & 0xf) << 28) | ((cmp & 0xf) << 24) | ((oparg & 0xfff) << 12) | (cmparg & 0xfff)
}

// linux/kexec.h
pub const KEXEC_ON_CRASH: c_int = 0x00000001;
pub const KEXEC_PRESERVE_CONTEXT: c_int = 0x00000002;
pub const KEXEC_ARCH_MASK: c_int = 0xffff0000;
pub const KEXEC_FILE_UNLOAD: c_int = 0x00000001;
pub const KEXEC_FILE_ON_CRASH: c_int = 0x00000002;
pub const KEXEC_FILE_NO_INITRAMFS: c_int = 0x00000004;

// linux/reboot.h
pub const LINUX_REBOOT_MAGIC1: c_int = 0xfee1dead;
pub const LINUX_REBOOT_MAGIC2: c_int = 672274793;
pub const LINUX_REBOOT_MAGIC2A: c_int = 85072278;
pub const LINUX_REBOOT_MAGIC2B: c_int = 369367448;
pub const LINUX_REBOOT_MAGIC2C: c_int = 537993216;

pub const LINUX_REBOOT_CMD_RESTART: c_int = 0x01234567;
pub const LINUX_REBOOT_CMD_HALT: c_int = 0xCDEF0123;
pub const LINUX_REBOOT_CMD_CAD_ON: c_int = 0x89ABCDEF;
pub const LINUX_REBOOT_CMD_CAD_OFF: c_int = 0x00000000;
pub const LINUX_REBOOT_CMD_POWER_OFF: c_int = 0x4321FEDC;
pub const LINUX_REBOOT_CMD_RESTART2: c_int = 0xA1B2C3D4;
pub const LINUX_REBOOT_CMD_SW_SUSPEND: c_int = 0xD000FCE2;
pub const LINUX_REBOOT_CMD_KEXEC: c_int = 0x45584543;

pub const REG_EXTENDED: c_int = 1;
pub const REG_ICASE: c_int = 2;
pub const REG_NEWLINE: c_int = 4;
pub const REG_NOSUB: c_int = 8;

pub const REG_NOTBOL: c_int = 1;
pub const REG_NOTEOL: c_int = 2;

pub const REG_ENOSYS: c_int = -1;
pub const REG_NOMATCH: c_int = 1;
pub const REG_BADPAT: c_int = 2;
pub const REG_ECOLLATE: c_int = 3;
pub const REG_ECTYPE: c_int = 4;
pub const REG_EESCAPE: c_int = 5;
pub const REG_ESUBREG: c_int = 6;
pub const REG_EBRACK: c_int = 7;
pub const REG_EPAREN: c_int = 8;
pub const REG_EBRACE: c_int = 9;
pub const REG_BADBR: c_int = 10;
pub const REG_ERANGE: c_int = 11;
pub const REG_ESPACE: c_int = 12;
pub const REG_BADRPT: c_int = 13;

// linux/errqueue.h
pub const SO_EE_ORIGIN_NONE: u8 = 0;
pub const SO_EE_ORIGIN_LOCAL: u8 = 1;
pub const SO_EE_ORIGIN_ICMP: u8 = 2;
pub const SO_EE_ORIGIN_ICMP6: u8 = 3;
pub const SO_EE_ORIGIN_TXSTATUS: u8 = 4;
pub const SO_EE_ORIGIN_TIMESTAMPING: u8 = SO_EE_ORIGIN_TXSTATUS;

// errno.h
pub const EPERM: c_int = 1;
pub const ENOENT: c_int = 2;
pub const ESRCH: c_int = 3;
pub const EINTR: c_int = 4;
pub const EIO: c_int = 5;
pub const ENXIO: c_int = 6;
pub const E2BIG: c_int = 7;
pub const ENOEXEC: c_int = 8;
pub const EBADF: c_int = 9;
pub const ECHILD: c_int = 10;
pub const EAGAIN: c_int = 11;
pub const ENOMEM: c_int = 12;
pub const EACCES: c_int = 13;
pub const EFAULT: c_int = 14;
pub const ENOTBLK: c_int = 15;
pub const EBUSY: c_int = 16;
pub const EEXIST: c_int = 17;
pub const EXDEV: c_int = 18;
pub const ENODEV: c_int = 19;
pub const ENOTDIR: c_int = 20;
pub const EISDIR: c_int = 21;
pub const EINVAL: c_int = 22;
pub const ENFILE: c_int = 23;
pub const EMFILE: c_int = 24;
pub const ENOTTY: c_int = 25;
pub const ETXTBSY: c_int = 26;
pub const EFBIG: c_int = 27;
pub const ENOSPC: c_int = 28;
pub const ESPIPE: c_int = 29;
pub const EROFS: c_int = 30;
pub const EMLINK: c_int = 31;
pub const EPIPE: c_int = 32;
pub const EDOM: c_int = 33;
pub const ERANGE: c_int = 34;
pub const EWOULDBLOCK: c_int = EAGAIN;

// linux/can.h
pub const CAN_EFF_FLAG: canid_t = 0x80000000;
pub const CAN_RTR_FLAG: canid_t = 0x40000000;
pub const CAN_ERR_FLAG: canid_t = 0x20000000;
pub const CAN_SFF_MASK: canid_t = 0x000007FF;
pub const CAN_EFF_MASK: canid_t = 0x1FFFFFFF;
pub const CAN_ERR_MASK: canid_t = 0x1FFFFFFF;
pub const CANXL_PRIO_MASK: crate::canid_t = CAN_SFF_MASK;

pub const CAN_SFF_ID_BITS: c_int = 11;
pub const CAN_EFF_ID_BITS: c_int = 29;
pub const CANXL_PRIO_BITS: c_int = CAN_SFF_ID_BITS;

pub const CAN_MAX_DLC: c_int = 8;
pub const CAN_MAX_DLEN: usize = 8;
pub const CANFD_MAX_DLC: c_int = 15;
pub const CANFD_MAX_DLEN: usize = 64;

pub const CANFD_BRS: c_int = 0x01;
pub const CANFD_ESI: c_int = 0x02;
pub const CANFD_FDF: c_int = 0x04;

pub const CANXL_MIN_DLC: c_int = 0;
pub const CANXL_MAX_DLC: c_int = 2047;
pub const CANXL_MAX_DLC_MASK: c_int = 0x07FF;
pub const CANXL_MIN_DLEN: usize = 1;
pub const CANXL_MAX_DLEN: usize = 2048;

pub const CANXL_XLF: c_int = 0x80;
pub const CANXL_SEC: c_int = 0x01;

pub const CAN_MTU: usize = size_of::<can_frame>();
pub const CANFD_MTU: usize = size_of::<canfd_frame>();
pub const CANXL_MTU: usize = size_of::<canxl_frame>();
// FIXME(offset_of): use `core::mem::offset_of!` once that is available
// https://github.com/rust-lang/rfcs/pull/3308
// pub const CANXL_HDR_SIZE: usize = core::mem::offset_of!(canxl_frame, data);
pub const CANXL_HDR_SIZE: usize = 12;
pub const CANXL_MIN_MTU: usize = CANXL_HDR_SIZE + 64;
pub const CANXL_MAX_MTU: usize = CANXL_MTU;

pub const CAN_RAW: c_int = 1;
pub const CAN_BCM: c_int = 2;
pub const CAN_TP16: c_int = 3;
pub const CAN_TP20: c_int = 4;
pub const CAN_MCNET: c_int = 5;
pub const CAN_ISOTP: c_int = 6;
pub const CAN_J1939: c_int = 7;
pub const CAN_NPROTO: c_int = 8;

pub const SOL_CAN_BASE: c_int = 100;

pub const CAN_INV_FILTER: canid_t = 0x20000000;
pub const CAN_RAW_FILTER_MAX: c_int = 512;

// linux/can/raw.h
pub const SOL_CAN_RAW: c_int = SOL_CAN_BASE + CAN_RAW;
pub const CAN_RAW_FILTER: c_int = 1;
pub const CAN_RAW_ERR_FILTER: c_int = 2;
pub const CAN_RAW_LOOPBACK: c_int = 3;
pub const CAN_RAW_RECV_OWN_MSGS: c_int = 4;
pub const CAN_RAW_FD_FRAMES: c_int = 5;
pub const CAN_RAW_JOIN_FILTERS: c_int = 6;
pub const CAN_RAW_XL_FRAMES: c_int = 7;

// linux/can/j1939.h
pub const SOL_CAN_J1939: c_int = SOL_CAN_BASE + CAN_J1939;

pub const J1939_MAX_UNICAST_ADDR: c_uchar = 0xfd;
pub const J1939_IDLE_ADDR: c_uchar = 0xfe;
pub const J1939_NO_ADDR: c_uchar = 0xff;
pub const J1939_NO_NAME: c_ulong = 0;
pub const J1939_PGN_REQUEST: c_uint = 0x0ea00;
pub const J1939_PGN_ADDRESS_CLAIMED: c_uint = 0x0ee00;
pub const J1939_PGN_ADDRESS_COMMANDED: c_uint = 0x0fed8;
pub const J1939_PGN_PDU1_MAX: c_uint = 0x3ff00;
pub const J1939_PGN_MAX: c_uint = 0x3ffff;
pub const J1939_NO_PGN: c_uint = 0x40000;

pub const SO_J1939_FILTER: c_int = 1;
pub const SO_J1939_PROMISC: c_int = 2;
pub const SO_J1939_SEND_PRIO: c_int = 3;
pub const SO_J1939_ERRQUEUE: c_int = 4;

pub const SCM_J1939_DEST_ADDR: c_int = 1;
pub const SCM_J1939_DEST_NAME: c_int = 2;
pub const SCM_J1939_PRIO: c_int = 3;
pub const SCM_J1939_ERRQUEUE: c_int = 4;

pub const J1939_NLA_PAD: c_int = 0;
pub const J1939_NLA_BYTES_ACKED: c_int = 1;
pub const J1939_NLA_TOTAL_SIZE: c_int = 2;
pub const J1939_NLA_PGN: c_int = 3;
pub const J1939_NLA_SRC_NAME: c_int = 4;
pub const J1939_NLA_DEST_NAME: c_int = 5;
pub const J1939_NLA_SRC_ADDR: c_int = 6;
pub const J1939_NLA_DEST_ADDR: c_int = 7;

pub const J1939_EE_INFO_NONE: c_int = 0;
pub const J1939_EE_INFO_TX_ABORT: c_int = 1;
pub const J1939_EE_INFO_RX_RTS: c_int = 2;
pub const J1939_EE_INFO_RX_DPO: c_int = 3;
pub const J1939_EE_INFO_RX_ABORT: c_int = 4;

pub const J1939_FILTER_MAX: c_int = 512;

// linux/sctp.h
pub const SCTP_FUTURE_ASSOC: c_int = 0;
pub const SCTP_CURRENT_ASSOC: c_int = 1;
pub const SCTP_ALL_ASSOC: c_int = 2;
pub const SCTP_RTOINFO: c_int = 0;
pub const SCTP_ASSOCINFO: c_int = 1;
pub const SCTP_INITMSG: c_int = 2;
pub const SCTP_NODELAY: c_int = 3;
pub const SCTP_AUTOCLOSE: c_int = 4;
pub const SCTP_SET_PEER_PRIMARY_ADDR: c_int = 5;
pub const SCTP_PRIMARY_ADDR: c_int = 6;
pub const SCTP_ADAPTATION_LAYER: c_int = 7;
pub const SCTP_DISABLE_FRAGMENTS: c_int = 8;
pub const SCTP_PEER_ADDR_PARAMS: c_int = 9;
pub const SCTP_DEFAULT_SEND_PARAM: c_int = 10;
pub const SCTP_EVENTS: c_int = 11;
pub const SCTP_I_WANT_MAPPED_V4_ADDR: c_int = 12;
pub const SCTP_MAXSEG: c_int = 13;
pub const SCTP_STATUS: c_int = 14;
pub const SCTP_GET_PEER_ADDR_INFO: c_int = 15;
pub const SCTP_DELAYED_ACK_TIME: c_int = 16;
pub const SCTP_DELAYED_ACK: c_int = SCTP_DELAYED_ACK_TIME;
pub const SCTP_DELAYED_SACK: c_int = SCTP_DELAYED_ACK_TIME;
pub const SCTP_CONTEXT: c_int = 17;
pub const SCTP_FRAGMENT_INTERLEAVE: c_int = 18;
pub const SCTP_PARTIAL_DELIVERY_POINT: c_int = 19;
pub const SCTP_MAX_BURST: c_int = 20;
pub const SCTP_AUTH_CHUNK: c_int = 21;
pub const SCTP_HMAC_IDENT: c_int = 22;
pub const SCTP_AUTH_KEY: c_int = 23;
pub const SCTP_AUTH_ACTIVE_KEY: c_int = 24;
pub const SCTP_AUTH_DELETE_KEY: c_int = 25;
pub const SCTP_PEER_AUTH_CHUNKS: c_int = 26;
pub const SCTP_LOCAL_AUTH_CHUNKS: c_int = 27;
pub const SCTP_GET_ASSOC_NUMBER: c_int = 28;
pub const SCTP_GET_ASSOC_ID_LIST: c_int = 29;
pub const SCTP_AUTO_ASCONF: c_int = 30;
pub const SCTP_PEER_ADDR_THLDS: c_int = 31;
pub const SCTP_RECVRCVINFO: c_int = 32;
pub const SCTP_RECVNXTINFO: c_int = 33;
pub const SCTP_DEFAULT_SNDINFO: c_int = 34;
pub const SCTP_AUTH_DEACTIVATE_KEY: c_int = 35;
pub const SCTP_REUSE_PORT: c_int = 36;
pub const SCTP_PEER_ADDR_THLDS_V2: c_int = 37;
pub const SCTP_PR_SCTP_NONE: c_int = 0x0000;
pub const SCTP_PR_SCTP_TTL: c_int = 0x0010;
pub const SCTP_PR_SCTP_RTX: c_int = 0x0020;
pub const SCTP_PR_SCTP_PRIO: c_int = 0x0030;
pub const SCTP_PR_SCTP_MAX: c_int = SCTP_PR_SCTP_PRIO;
pub const SCTP_PR_SCTP_MASK: c_int = 0x0030;
pub const SCTP_ENABLE_RESET_STREAM_REQ: c_int = 0x01;
pub const SCTP_ENABLE_RESET_ASSOC_REQ: c_int = 0x02;
pub const SCTP_ENABLE_CHANGE_ASSOC_REQ: c_int = 0x04;
pub const SCTP_ENABLE_STRRESET_MASK: c_int = 0x07;
pub const SCTP_STREAM_RESET_INCOMING: c_int = 0x01;
pub const SCTP_STREAM_RESET_OUTGOING: c_int = 0x02;

pub const SCTP_INIT: c_int = 0;
pub const SCTP_SNDRCV: c_int = 1;
pub const SCTP_SNDINFO: c_int = 2;
pub const SCTP_RCVINFO: c_int = 3;
pub const SCTP_NXTINFO: c_int = 4;
pub const SCTP_PRINFO: c_int = 5;
pub const SCTP_AUTHINFO: c_int = 6;
pub const SCTP_DSTADDRV4: c_int = 7;
pub const SCTP_DSTADDRV6: c_int = 8;

pub const SCTP_UNORDERED: c_int = 1 << 0;
pub const SCTP_ADDR_OVER: c_int = 1 << 1;
pub const SCTP_ABORT: c_int = 1 << 2;
pub const SCTP_SACK_IMMEDIATELY: c_int = 1 << 3;
pub const SCTP_SENDALL: c_int = 1 << 6;
pub const SCTP_PR_SCTP_ALL: c_int = 1 << 7;
pub const SCTP_NOTIFICATION: c_int = MSG_NOTIFICATION;
pub const SCTP_EOF: c_int = crate::MSG_FIN;

/* DCCP socket options */
pub const DCCP_SOCKOPT_PACKET_SIZE: c_int = 1;
pub const DCCP_SOCKOPT_SERVICE: c_int = 2;
pub const DCCP_SOCKOPT_CHANGE_L: c_int = 3;
pub const DCCP_SOCKOPT_CHANGE_R: c_int = 4;
pub const DCCP_SOCKOPT_GET_CUR_MPS: c_int = 5;
pub const DCCP_SOCKOPT_SERVER_TIMEWAIT: c_int = 6;
pub const DCCP_SOCKOPT_SEND_CSCOV: c_int = 10;
pub const DCCP_SOCKOPT_RECV_CSCOV: c_int = 11;
pub const DCCP_SOCKOPT_AVAILABLE_CCIDS: c_int = 12;
pub const DCCP_SOCKOPT_CCID: c_int = 13;
pub const DCCP_SOCKOPT_TX_CCID: c_int = 14;
pub const DCCP_SOCKOPT_RX_CCID: c_int = 15;
pub const DCCP_SOCKOPT_QPOLICY_ID: c_int = 16;
pub const DCCP_SOCKOPT_QPOLICY_TXQLEN: c_int = 17;
pub const DCCP_SOCKOPT_CCID_RX_INFO: c_int = 128;
pub const DCCP_SOCKOPT_CCID_TX_INFO: c_int = 192;

/// maximum number of services provided on the same listening port
pub const DCCP_SERVICE_LIST_MAX_LEN: c_int = 32;

pub const CTL_KERN: c_int = 1;
pub const CTL_VM: c_int = 2;
pub const CTL_NET: c_int = 3;
pub const CTL_FS: c_int = 5;
pub const CTL_DEBUG: c_int = 6;
pub const CTL_DEV: c_int = 7;
pub const CTL_BUS: c_int = 8;
pub const CTL_ABI: c_int = 9;
pub const CTL_CPU: c_int = 10;

pub const CTL_BUS_ISA: c_int = 1;

pub const INOTIFY_MAX_USER_INSTANCES: c_int = 1;
pub const INOTIFY_MAX_USER_WATCHES: c_int = 2;
pub const INOTIFY_MAX_QUEUED_EVENTS: c_int = 3;

pub const KERN_OSTYPE: c_int = 1;
pub const KERN_OSRELEASE: c_int = 2;
pub const KERN_OSREV: c_int = 3;
pub const KERN_VERSION: c_int = 4;
pub const KERN_SECUREMASK: c_int = 5;
pub const KERN_PROF: c_int = 6;
pub const KERN_NODENAME: c_int = 7;
pub const KERN_DOMAINNAME: c_int = 8;
pub const KERN_PANIC: c_int = 15;
pub const KERN_REALROOTDEV: c_int = 16;
pub const KERN_SPARC_REBOOT: c_int = 21;
pub const KERN_CTLALTDEL: c_int = 22;
pub const KERN_PRINTK: c_int = 23;
pub const KERN_NAMETRANS: c_int = 24;
pub const KERN_PPC_HTABRECLAIM: c_int = 25;
pub const KERN_PPC_ZEROPAGED: c_int = 26;
pub const KERN_PPC_POWERSAVE_NAP: c_int = 27;
pub const KERN_MODPROBE: c_int = 28;
pub const KERN_SG_BIG_BUFF: c_int = 29;
pub const KERN_ACCT: c_int = 30;
pub const KERN_PPC_L2CR: c_int = 31;
pub const KERN_RTSIGNR: c_int = 32;
pub const KERN_RTSIGMAX: c_int = 33;
pub const KERN_SHMMAX: c_int = 34;
pub const KERN_MSGMAX: c_int = 35;
pub const KERN_MSGMNB: c_int = 36;
pub const KERN_MSGPOOL: c_int = 37;
pub const KERN_SYSRQ: c_int = 38;
pub const KERN_MAX_THREADS: c_int = 39;
pub const KERN_RANDOM: c_int = 40;
pub const KERN_SHMALL: c_int = 41;
pub const KERN_MSGMNI: c_int = 42;
pub const KERN_SEM: c_int = 43;
pub const KERN_SPARC_STOP_A: c_int = 44;
pub const KERN_SHMMNI: c_int = 45;
pub const KERN_OVERFLOWUID: c_int = 46;
pub const KERN_OVERFLOWGID: c_int = 47;
pub const KERN_SHMPATH: c_int = 48;
pub const KERN_HOTPLUG: c_int = 49;
pub const KERN_IEEE_EMULATION_WARNINGS: c_int = 50;
pub const KERN_S390_USER_DEBUG_LOGGING: c_int = 51;
pub const KERN_CORE_USES_PID: c_int = 52;
pub const KERN_TAINTED: c_int = 53;
pub const KERN_CADPID: c_int = 54;
pub const KERN_PIDMAX: c_int = 55;
pub const KERN_CORE_PATTERN: c_int = 56;
pub const KERN_PANIC_ON_OOPS: c_int = 57;
pub const KERN_HPPA_PWRSW: c_int = 58;
pub const KERN_HPPA_UNALIGNED: c_int = 59;
pub const KERN_PRINTK_RATELIMIT: c_int = 60;
pub const KERN_PRINTK_RATELIMIT_BURST: c_int = 61;
pub const KERN_PTY: c_int = 62;
pub const KERN_NGROUPS_MAX: c_int = 63;
pub const KERN_SPARC_SCONS_PWROFF: c_int = 64;
pub const KERN_HZ_TIMER: c_int = 65;
pub const KERN_UNKNOWN_NMI_PANIC: c_int = 66;
pub const KERN_BOOTLOADER_TYPE: c_int = 67;
pub const KERN_RANDOMIZE: c_int = 68;
pub const KERN_SETUID_DUMPABLE: c_int = 69;
pub const KERN_SPIN_RETRY: c_int = 70;
pub const KERN_ACPI_VIDEO_FLAGS: c_int = 71;
pub const KERN_IA64_UNALIGNED: c_int = 72;
pub const KERN_COMPAT_LOG: c_int = 73;
pub const KERN_MAX_LOCK_DEPTH: c_int = 74;
pub const KERN_NMI_WATCHDOG: c_int = 75;
pub const KERN_PANIC_ON_NMI: c_int = 76;

pub const VM_OVERCOMMIT_MEMORY: c_int = 5;
pub const VM_PAGE_CLUSTER: c_int = 10;
pub const VM_DIRTY_BACKGROUND: c_int = 11;
pub const VM_DIRTY_RATIO: c_int = 12;
pub const VM_DIRTY_WB_CS: c_int = 13;
pub const VM_DIRTY_EXPIRE_CS: c_int = 14;
pub const VM_NR_PDFLUSH_THREADS: c_int = 15;
pub const VM_OVERCOMMIT_RATIO: c_int = 16;
pub const VM_PAGEBUF: c_int = 17;
pub const VM_HUGETLB_PAGES: c_int = 18;
pub const VM_SWAPPINESS: c_int = 19;
pub const VM_LOWMEM_RESERVE_RATIO: c_int = 20;
pub const VM_MIN_FREE_KBYTES: c_int = 21;
pub const VM_MAX_MAP_COUNT: c_int = 22;
pub const VM_LAPTOP_MODE: c_int = 23;
pub const VM_BLOCK_DUMP: c_int = 24;
pub const VM_HUGETLB_GROUP: c_int = 25;
pub const VM_VFS_CACHE_PRESSURE: c_int = 26;
pub const VM_LEGACY_VA_LAYOUT: c_int = 27;
pub const VM_SWAP_TOKEN_TIMEOUT: c_int = 28;
pub const VM_DROP_PAGECACHE: c_int = 29;
pub const VM_PERCPU_PAGELIST_FRACTION: c_int = 30;
pub const VM_ZONE_RECLAIM_MODE: c_int = 31;
pub const VM_MIN_UNMAPPED: c_int = 32;
pub const VM_PANIC_ON_OOM: c_int = 33;
pub const VM_VDSO_ENABLED: c_int = 34;
pub const VM_MIN_SLAB: c_int = 35;

pub const NET_CORE: c_int = 1;
pub const NET_ETHER: c_int = 2;
pub const NET_802: c_int = 3;
pub const NET_UNIX: c_int = 4;
pub const NET_IPV4: c_int = 5;
pub const NET_IPX: c_int = 6;
pub const NET_ATALK: c_int = 7;
pub const NET_NETROM: c_int = 8;
pub const NET_AX25: c_int = 9;
pub const NET_BRIDGE: c_int = 10;
pub const NET_ROSE: c_int = 11;
pub const NET_IPV6: c_int = 12;
pub const NET_X25: c_int = 13;
pub const NET_TR: c_int = 14;
pub const NET_DECNET: c_int = 15;
pub const NET_ECONET: c_int = 16;
pub const NET_SCTP: c_int = 17;
pub const NET_LLC: c_int = 18;
pub const NET_NETFILTER: c_int = 19;
pub const NET_DCCP: c_int = 20;
pub const NET_IRDA: c_int = 412;

// include/linux/sched.h
/// I'm a virtual CPU.
pub const PF_VCPU: c_int = 0x00000001;
/// I am an IDLE thread.
pub const PF_IDLE: c_int = 0x00000002;
/// Getting shut down.
pub const PF_EXITING: c_int = 0x00000004;
/// Coredumps should ignore this task.
pub const PF_POSTCOREDUMP: c_int = 0x00000008;
/// Task is an IO worker.
pub const PF_IO_WORKER: c_int = 0x00000010;
/// I'm a workqueue worker.
pub const PF_WQ_WORKER: c_int = 0x00000020;
/// Forked but didn't exec.
pub const PF_FORKNOEXEC: c_int = 0x00000040;
/// Process policy on mce errors.
pub const PF_MCE_PROCESS: c_int = 0x00000080;
/// Used super-user privileges.
pub const PF_SUPERPRIV: c_int = 0x00000100;
/// Dumped core.
pub const PF_DUMPCORE: c_int = 0x00000200;
/// Killed by a signal.
pub const PF_SIGNALED: c_int = 0x00000400;
/// Allocating memory to free memory.
///
/// See `memalloc_noreclaim_save()`.
pub const PF_MEMALLOC: c_int = 0x00000800;
/// `set_user()` noticed that `RLIMIT_NPROC` was exceeded.
pub const PF_NPROC_EXCEEDED: c_int = 0x00001000;
/// If unset the fpu must be initialized before use.
pub const PF_USED_MATH: c_int = 0x00002000;
/// Kernel thread cloned from userspace thread.
pub const PF_USER_WORKER: c_int = 0x00004000;
/// This thread should not be frozen.
pub const PF_NOFREEZE: c_int = 0x00008000;
/// I am `kswapd`.
pub const PF_KSWAPD: c_int = 0x00020000;
/// All allocations inherit `GFP_NOFS`.
///
/// See `memalloc_nfs_save()`.
pub const PF_MEMALLOC_NOFS: c_int = 0x00040000;
/// All allocations inherit `GFP_NOIO`.
///
/// See `memalloc_noio_save()`.
pub const PF_MEMALLOC_NOIO: c_int = 0x00080000;
/// Throttle writes only against the bdi I write to, I am cleaning
/// dirty pages from some other bdi.
pub const PF_LOCAL_THROTTLE: c_int = 0x00100000;
/// I am a kernel thread.
pub const PF_KTHREAD: c_int = 0x00200000;
/// Randomize virtual address space.
pub const PF_RANDOMIZE: c_int = 0x00400000;
/// Userland is not allowed to meddle with `cpus_mask`.
pub const PF_NO_SETAFFINITY: c_int = 0x04000000;
/// Early kill for mce process policy.
pub const PF_MCE_EARLY: c_int = 0x08000000;
/// Allocations constrained to zones which allow long term pinning.
///
/// See `memalloc_pin_save()`.
pub const PF_MEMALLOC_PIN: c_int = 0x10000000;
/// Plug has ts that needs updating.
pub const PF_BLOCK_TS: c_int = 0x20000000;
/// This thread called `freeze_processes()` and should not be frozen.
pub const PF_SUSPEND_TASK: c_int = PF_SUSPEND_TASK_UINT as _;
// The used value is the highest possible bit fitting on 32 bits, so directly
// defining it as a signed integer causes the compiler to report an overflow.
// Use instead a private intermediary that assuringly has the correct type and
// cast it where necessary to the wanted final type, which preserves the
// desired information as-is in terms of integer representation.
const PF_SUSPEND_TASK_UINT: c_uint = 0x80000000;

pub const CSIGNAL: c_int = 0x000000ff;

pub const SCHED_NORMAL: c_int = 0;
pub const SCHED_OTHER: c_int = 0;
pub const SCHED_FIFO: c_int = 1;
pub const SCHED_RR: c_int = 2;
pub const SCHED_BATCH: c_int = 3;
pub const SCHED_IDLE: c_int = 5;
pub const SCHED_DEADLINE: c_int = 6;

pub const SCHED_RESET_ON_FORK: c_int = 0x40000000;

pub const CLONE_PIDFD: c_int = 0x1000;

pub const SCHED_FLAG_RESET_ON_FORK: c_int = 0x01;
pub const SCHED_FLAG_RECLAIM: c_int = 0x02;
pub const SCHED_FLAG_DL_OVERRUN: c_int = 0x04;
pub const SCHED_FLAG_KEEP_POLICY: c_int = 0x08;
pub const SCHED_FLAG_KEEP_PARAMS: c_int = 0x10;
pub const SCHED_FLAG_UTIL_CLAMP_MIN: c_int = 0x20;
pub const SCHED_FLAG_UTIL_CLAMP_MAX: c_int = 0x40;

// linux/if_xdp.h
pub const XDP_SHARED_UMEM: crate::__u16 = 1 << 0;
pub const XDP_COPY: crate::__u16 = 1 << 1;
pub const XDP_ZEROCOPY: crate::__u16 = 1 << 2;
pub const XDP_USE_NEED_WAKEUP: crate::__u16 = 1 << 3;
pub const XDP_USE_SG: crate::__u16 = 1 << 4;

pub const XDP_UMEM_UNALIGNED_CHUNK_FLAG: crate::__u32 = 1 << 0;

pub const XDP_RING_NEED_WAKEUP: crate::__u32 = 1 << 0;

pub const XDP_MMAP_OFFSETS: c_int = 1;
pub const XDP_RX_RING: c_int = 2;
pub const XDP_TX_RING: c_int = 3;
pub const XDP_UMEM_REG: c_int = 4;
pub const XDP_UMEM_FILL_RING: c_int = 5;
pub const XDP_UMEM_COMPLETION_RING: c_int = 6;
pub const XDP_STATISTICS: c_int = 7;
pub const XDP_OPTIONS: c_int = 8;

pub const XDP_OPTIONS_ZEROCOPY: crate::__u32 = 1 << 0;

pub const XDP_PGOFF_RX_RING: crate::off_t = 0;
pub const XDP_PGOFF_TX_RING: crate::off_t = 0x80000000;
pub const XDP_UMEM_PGOFF_FILL_RING: crate::c_ulonglong = 0x100000000;
pub const XDP_UMEM_PGOFF_COMPLETION_RING: crate::c_ulonglong = 0x180000000;

pub const XSK_UNALIGNED_BUF_OFFSET_SHIFT: crate::c_int = 48;
pub const XSK_UNALIGNED_BUF_ADDR_MASK: crate::c_ulonglong =
    (1 << XSK_UNALIGNED_BUF_OFFSET_SHIFT) - 1;

pub const XDP_PKT_CONTD: crate::__u32 = 1 << 0;

pub const XDP_UMEM_TX_SW_CSUM: crate::__u32 = 1 << 1;
pub const XDP_UMEM_TX_METADATA_LEN: crate::__u32 = 1 << 2;

pub const XDP_TXMD_FLAGS_TIMESTAMP: crate::__u32 = 1 << 0;
pub const XDP_TXMD_FLAGS_CHECKSUM: crate::__u32 = 1 << 1;

pub const XDP_TX_METADATA: crate::__u32 = 1 << 1;

pub const SOL_XDP: c_int = 283;

// linux/mount.h
pub const MOUNT_ATTR_RDONLY: crate::__u64 = 0x00000001;
pub const MOUNT_ATTR_NOSUID: crate::__u64 = 0x00000002;
pub const MOUNT_ATTR_NODEV: crate::__u64 = 0x00000004;
pub const MOUNT_ATTR_NOEXEC: crate::__u64 = 0x00000008;
pub const MOUNT_ATTR__ATIME: crate::__u64 = 0x00000070;
pub const MOUNT_ATTR_RELATIME: crate::__u64 = 0x00000000;
pub const MOUNT_ATTR_NOATIME: crate::__u64 = 0x00000010;
pub const MOUNT_ATTR_STRICTATIME: crate::__u64 = 0x00000020;
pub const MOUNT_ATTR_NODIRATIME: crate::__u64 = 0x00000080;
pub const MOUNT_ATTR_IDMAP: crate::__u64 = 0x00100000;
pub const MOUNT_ATTR_NOSYMFOLLOW: crate::__u64 = 0x00200000;

pub const MOUNT_ATTR_SIZE_VER0: c_int = 32;

// elf.h
pub const NT_PRSTATUS: c_int = 1;
pub const NT_PRFPREG: c_int = 2;
pub const NT_FPREGSET: c_int = 2;
pub const NT_PRPSINFO: c_int = 3;
pub const NT_PRXREG: c_int = 4;
pub const NT_TASKSTRUCT: c_int = 4;
pub const NT_PLATFORM: c_int = 5;
pub const NT_AUXV: c_int = 6;
pub const NT_GWINDOWS: c_int = 7;
pub const NT_ASRS: c_int = 8;
pub const NT_PSTATUS: c_int = 10;
pub const NT_PSINFO: c_int = 13;
pub const NT_PRCRED: c_int = 14;
pub const NT_UTSNAME: c_int = 15;
pub const NT_LWPSTATUS: c_int = 16;
pub const NT_LWPSINFO: c_int = 17;
pub const NT_PRFPXREG: c_int = 20;

pub const SCHED_FLAG_KEEP_ALL: c_int = SCHED_FLAG_KEEP_POLICY | SCHED_FLAG_KEEP_PARAMS;

pub const SCHED_FLAG_UTIL_CLAMP: c_int = SCHED_FLAG_UTIL_CLAMP_MIN | SCHED_FLAG_UTIL_CLAMP_MAX;

pub const SCHED_FLAG_ALL: c_int = SCHED_FLAG_RESET_ON_FORK
    | SCHED_FLAG_RECLAIM
    | SCHED_FLAG_DL_OVERRUN
    | SCHED_FLAG_KEEP_ALL
    | SCHED_FLAG_UTIL_CLAMP;

// ioctl_eventpoll: added in Linux 6.9
pub const EPIOCSPARAMS: Ioctl = 0x40088a01;
pub const EPIOCGPARAMS: Ioctl = 0x80088a02;

// siginfo.h
pub const SI_DETHREAD: c_int = -7;
pub const TRAP_PERF: c_int = 6;

f! {
    pub fn NLA_ALIGN(len: c_int) -> c_int {
        return ((len) + NLA_ALIGNTO - 1) & !(NLA_ALIGNTO - 1);
    }

    pub fn CMSG_NXTHDR(mhdr: *const msghdr, cmsg: *const cmsghdr) -> *mut cmsghdr {
        if ((*cmsg).cmsg_len as usize) < size_of::<cmsghdr>() {
            return core::ptr::null_mut::<cmsghdr>();
        }
        let next = (cmsg as usize + super::CMSG_ALIGN((*cmsg).cmsg_len as usize)) as *mut cmsghdr;
        let max = (*mhdr).msg_control as usize + (*mhdr).msg_controllen as usize;
        if (next.wrapping_offset(1)) as usize > max
            || next as usize + super::CMSG_ALIGN((*next).cmsg_len as usize) > max
        {
            core::ptr::null_mut::<cmsghdr>()
        } else {
            next
        }
    }

    pub fn CPU_ALLOC_SIZE(count: c_int) -> size_t {
        let _dummy: cpu_set_t = mem::zeroed();
        let size_in_bits = 8 * mem::size_of_val(&_dummy.bits[0]);
        ((count as size_t + size_in_bits - 1) / 8) as size_t
    }

    pub fn CPU_ZERO(cpuset: &mut cpu_set_t) -> () {
        for slot in &mut cpuset.bits {
            *slot = 0;
        }
    }

    pub fn CPU_SET(cpu: usize, cpuset: &mut cpu_set_t) -> () {
        let size_in_bits = 8 * mem::size_of_val(&cpuset.bits[0]); // 32, 64 etc
        let (idx, offset) = (cpu / size_in_bits, cpu % size_in_bits);
        cpuset.bits[idx] |= 1 << offset;
    }

    pub fn CPU_CLR(cpu: usize, cpuset: &mut cpu_set_t) -> () {
        let size_in_bits = 8 * mem::size_of_val(&cpuset.bits[0]); // 32, 64 etc
        let (idx, offset) = (cpu / size_in_bits, cpu % size_in_bits);
        cpuset.bits[idx] &= !(1 << offset);
    }

    pub fn CPU_ISSET(cpu: usize, cpuset: &cpu_set_t) -> bool {
        let size_in_bits = 8 * mem::size_of_val(&cpuset.bits[0]);
        let (idx, offset) = (cpu / size_in_bits, cpu % size_in_bits);
        0 != (cpuset.bits[idx] & (1 << offset))
    }

    pub fn CPU_COUNT_S(size: usize, cpuset: &cpu_set_t) -> c_int {
        let mut s: u32 = 0;
        let size_of_mask = mem::size_of_val(&cpuset.bits[0]);
        for i in &cpuset.bits[..(size / size_of_mask)] {
            s += i.count_ones();
        }
        s as c_int
    }

    pub fn CPU_COUNT(cpuset: &cpu_set_t) -> c_int {
        CPU_COUNT_S(size_of::<cpu_set_t>(), cpuset)
    }

    pub fn CPU_EQUAL(set1: &cpu_set_t, set2: &cpu_set_t) -> bool {
        set1.bits == set2.bits
    }

    pub fn SCTP_PR_INDEX(policy: c_int) -> c_int {
        policy >> (4 - 1)
    }

    pub fn SCTP_PR_POLICY(policy: c_int) -> c_int {
        policy & SCTP_PR_SCTP_MASK
    }

    pub fn SCTP_PR_SET_POLICY(flags: &mut c_int, policy: c_int) -> () {
        *flags &= !SCTP_PR_SCTP_MASK;
        *flags |= policy;
    }

    pub fn IPTOS_TOS(tos: u8) -> u8 {
        tos & IPTOS_TOS_MASK
    }

    pub fn IPTOS_PREC(tos: u8) -> u8 {
        tos & IPTOS_PREC_MASK
    }

    pub fn RT_TOS(tos: u8) -> u8 {
        tos & crate::IPTOS_TOS_MASK
    }

    pub fn RT_ADDRCLASS(flags: u32) -> u32 {
        flags >> 23
    }

    pub fn RT_LOCALADDR(flags: u32) -> bool {
        (flags & RTF_ADDRCLASSMASK) == (RTF_LOCAL | RTF_INTERFACE)
    }

    pub fn SO_EE_OFFENDER(ee: *const crate::sock_extended_err) -> *mut crate::sockaddr {
        ee.offset(1) as *mut crate::sockaddr
    }

    pub fn TPACKET_ALIGN(x: usize) -> usize {
        (x + TPACKET_ALIGNMENT - 1) & !(TPACKET_ALIGNMENT - 1)
    }

    pub fn BPF_CLASS(code: __u32) -> __u32 {
        code & 0x07
    }

    pub fn BPF_SIZE(code: __u32) -> __u32 {
        code & 0x18
    }

    pub fn BPF_MODE(code: __u32) -> __u32 {
        code & 0xe0
    }

    pub fn BPF_OP(code: __u32) -> __u32 {
        code & 0xf0
    }

    pub fn BPF_SRC(code: __u32) -> __u32 {
        code & 0x08
    }

    pub fn BPF_RVAL(code: __u32) -> __u32 {
        code & 0x18
    }

    pub fn BPF_MISCOP(code: __u32) -> __u32 {
        code & 0xf8
    }

    pub fn BPF_STMT(code: __u16, k: __u32) -> sock_filter {
        sock_filter {
            code,
            jt: 0,
            jf: 0,
            k,
        }
    }

    pub fn BPF_JUMP(code: __u16, k: __u32, jt: __u8, jf: __u8) -> sock_filter {
        sock_filter { code, jt, jf, k }
    }

    pub fn ELF32_R_SYM(val: Elf32_Word) -> Elf32_Word {
        val >> 8
    }

    pub fn ELF32_R_TYPE(val: Elf32_Word) -> Elf32_Word {
        val & 0xff
    }

    pub fn ELF32_R_INFO(sym: Elf32_Word, t: Elf32_Word) -> Elf32_Word {
        sym << (8 + t) & 0xff
    }

    pub fn ELF64_R_SYM(val: Elf64_Xword) -> Elf64_Xword {
        val >> 32
    }

    pub fn ELF64_R_TYPE(val: Elf64_Xword) -> Elf64_Xword {
        val & 0xffffffff
    }

    pub fn ELF64_R_INFO(sym: Elf64_Xword, t: Elf64_Xword) -> Elf64_Xword {
        sym << (32 + t)
    }
}

safe_f! {
    pub {const} fn makedev(major: c_uint, minor: c_uint) -> crate::dev_t {
        let major = major as crate::dev_t;
        let minor = minor as crate::dev_t;
        let mut dev = 0;
        dev |= (major & 0x00000fff) << 8;
        dev |= (major & 0xfffff000) << 32;
        dev |= (minor & 0x000000ff) << 0;
        dev |= (minor & 0xffffff00) << 12;
        dev
    }

    pub {const} fn major(dev: crate::dev_t) -> c_uint {
        let mut major = 0;
        major |= (dev & 0x00000000000fff00) >> 8;
        major |= (dev & 0xfffff00000000000) >> 32;
        major as c_uint
    }

    pub {const} fn minor(dev: crate::dev_t) -> c_uint {
        let mut minor = 0;
        minor |= (dev & 0x00000000000000ff) >> 0;
        minor |= (dev & 0x00000ffffff00000) >> 12;
        minor as c_uint
    }

    pub {const} fn SCTP_PR_TTL_ENABLED(policy: c_int) -> bool {
        policy == SCTP_PR_SCTP_TTL
    }

    pub {const} fn SCTP_PR_RTX_ENABLED(policy: c_int) -> bool {
        policy == SCTP_PR_SCTP_RTX
    }

    pub {const} fn SCTP_PR_PRIO_ENABLED(policy: c_int) -> bool {
        policy == SCTP_PR_SCTP_PRIO
    }
}

cfg_if! {
    if #[cfg(all(
        any(target_env = "gnu", target_env = "musl", target_env = "ohos"),
        any(target_arch = "x86_64", target_arch = "x86")
    ))] {
        extern "C" {
            pub fn iopl(level: c_int) -> c_int;
            pub fn ioperm(from: c_ulong, num: c_ulong, turn_on: c_int) -> c_int;
        }
    }
}

cfg_if! {
    if #[cfg(all(not(target_env = "uclibc"), not(target_env = "ohos")))] {
        extern "C" {
            #[cfg_attr(gnu_file_offset_bits64, link_name = "aio_read64")]
            pub fn aio_read(aiocbp: *mut aiocb) -> c_int;
            #[cfg_attr(gnu_file_offset_bits64, link_name = "aio_write64")]
            pub fn aio_write(aiocbp: *mut aiocb) -> c_int;
            pub fn aio_fsync(op: c_int, aiocbp: *mut aiocb) -> c_int;
            #[cfg_attr(gnu_file_offset_bits64, link_name = "aio_error64")]
            pub fn aio_error(aiocbp: *const aiocb) -> c_int;
            #[cfg_attr(gnu_file_offset_bits64, link_name = "aio_return64")]
            pub fn aio_return(aiocbp: *mut aiocb) -> ssize_t;
            #[cfg_attr(gnu_time_bits64, link_name = "__aio_suspend_time64")]
            pub fn aio_suspend(
                aiocb_list: *const *const aiocb,
                nitems: c_int,
                timeout: *const crate::timespec,
            ) -> c_int;
            #[cfg_attr(gnu_file_offset_bits64, link_name = "aio_cancel64")]
            pub fn aio_cancel(fd: c_int, aiocbp: *mut aiocb) -> c_int;
            #[cfg_attr(gnu_file_offset_bits64, link_name = "lio_listio64")]
            pub fn lio_listio(
                mode: c_int,
                aiocb_list: *const *mut aiocb,
                nitems: c_int,
                sevp: *mut crate::sigevent,
            ) -> c_int;
        }
    }
}

cfg_if! {
    if #[cfg(not(target_env = "uclibc"))] {
        extern "C" {
            #[cfg_attr(gnu_file_offset_bits64, link_name = "pwritev64")]
            pub fn pwritev(
                fd: c_int,
                iov: *const crate::iovec,
                iovcnt: c_int,
                offset: off_t,
            ) -> ssize_t;
            #[cfg_attr(gnu_file_offset_bits64, link_name = "preadv64")]
            pub fn preadv(
                fd: c_int,
                iov: *const crate::iovec,
                iovcnt: c_int,
                offset: off_t,
            ) -> ssize_t;
            pub fn getnameinfo(
                sa: *const crate::sockaddr,
                salen: crate::socklen_t,
                host: *mut c_char,
                hostlen: crate::socklen_t,
                serv: *mut c_char,
                servlen: crate::socklen_t,
                flags: c_int,
            ) -> c_int;
            pub fn getloadavg(loadavg: *mut c_double, nelem: c_int) -> c_int;
            pub fn process_vm_readv(
                pid: crate::pid_t,
                local_iov: *const crate::iovec,
                liovcnt: c_ulong,
                remote_iov: *const crate::iovec,
                riovcnt: c_ulong,
                flags: c_ulong,
            ) -> isize;
            pub fn process_vm_writev(
                pid: crate::pid_t,
                local_iov: *const crate::iovec,
                liovcnt: c_ulong,
                remote_iov: *const crate::iovec,
                riovcnt: c_ulong,
                flags: c_ulong,
            ) -> isize;
            #[cfg_attr(gnu_time_bits64, link_name = "__futimes64")]
            pub fn futimes(fd: c_int, times: *const crate::timeval) -> c_int;
        }
    }
}

// These functions are not available on OpenHarmony
cfg_if! {
    if #[cfg(not(target_env = "ohos"))] {
        extern "C" {
            // Only `getspnam_r` is implemented for musl, out of all of the reenterant
            // functions from `shadow.h`.
            // https://git.musl-libc.org/cgit/musl/tree/include/shadow.h
            pub fn getspnam_r(
                name: *const c_char,
                spbuf: *mut spwd,
                buf: *mut c_char,
                buflen: size_t,
                spbufp: *mut *mut spwd,
            ) -> c_int;

            pub fn mq_open(name: *const c_char, oflag: c_int, ...) -> crate::mqd_t;
            pub fn mq_close(mqd: crate::mqd_t) -> c_int;
            pub fn mq_unlink(name: *const c_char) -> c_int;
            pub fn mq_receive(
                mqd: crate::mqd_t,
                msg_ptr: *mut c_char,
                msg_len: size_t,
                msg_prio: *mut c_uint,
            ) -> ssize_t;
            #[cfg_attr(gnu_time_bits64, link_name = "__mq_timedreceive_time64")]
            pub fn mq_timedreceive(
                mqd: crate::mqd_t,
                msg_ptr: *mut c_char,
                msg_len: size_t,
                msg_prio: *mut c_uint,
                abs_timeout: *const crate::timespec,
            ) -> ssize_t;
            pub fn mq_send(
                mqd: crate::mqd_t,
                msg_ptr: *const c_char,
                msg_len: size_t,
                msg_prio: c_uint,
            ) -> c_int;
            #[cfg_attr(gnu_time_bits64, link_name = "__mq_timedsend_time64")]
            pub fn mq_timedsend(
                mqd: crate::mqd_t,
                msg_ptr: *const c_char,
                msg_len: size_t,
                msg_prio: c_uint,
                abs_timeout: *const crate::timespec,
            ) -> c_int;
            pub fn mq_getattr(mqd: crate::mqd_t, attr: *mut crate::mq_attr) -> c_int;
            pub fn mq_setattr(
                mqd: crate::mqd_t,
                newattr: *const crate::mq_attr,
                oldattr: *mut crate::mq_attr,
            ) -> c_int;

            pub fn pthread_mutex_consistent(mutex: *mut pthread_mutex_t) -> c_int;
            pub fn pthread_cancel(thread: crate::pthread_t) -> c_int;
            pub fn pthread_mutexattr_getrobust(
                attr: *const pthread_mutexattr_t,
                robustness: *mut c_int,
            ) -> c_int;
            pub fn pthread_mutexattr_setrobust(
                attr: *mut pthread_mutexattr_t,
                robustness: c_int,
            ) -> c_int;
        }
    }
}

extern "C" {
    #[cfg_attr(
        not(any(target_env = "musl", target_env = "ohos")),
        link_name = "__xpg_strerror_r"
    )]
    pub fn strerror_r(errnum: c_int, buf: *mut c_char, buflen: size_t) -> c_int;

    pub fn abs(i: c_int) -> c_int;
    pub fn labs(i: c_long) -> c_long;
    pub fn rand() -> c_int;
    pub fn srand(seed: c_uint);

    pub fn drand48() -> c_double;
    pub fn erand48(xseed: *mut c_ushort) -> c_double;
    pub fn lrand48() -> c_long;
    pub fn nrand48(xseed: *mut c_ushort) -> c_long;
    pub fn mrand48() -> c_long;
    pub fn jrand48(xseed: *mut c_ushort) -> c_long;
    pub fn srand48(seed: c_long);
    pub fn seed48(xseed: *mut c_ushort) -> *mut c_ushort;
    pub fn lcong48(p: *mut c_ushort);

    #[cfg_attr(gnu_time_bits64, link_name = "__lutimes64")]
    pub fn lutimes(file: *const c_char, times: *const crate::timeval) -> c_int;

    pub fn setpwent();
    pub fn endpwent();
    pub fn getpwent() -> *mut passwd;
    pub fn setgrent();
    pub fn endgrent();
    pub fn getgrent() -> *mut crate::group;
    pub fn setspent();
    pub fn endspent();
    pub fn getspent() -> *mut spwd;

    pub fn getspnam(name: *const c_char) -> *mut spwd;

    pub fn shm_open(name: *const c_char, oflag: c_int, mode: mode_t) -> c_int;
    pub fn shm_unlink(name: *const c_char) -> c_int;

    // System V IPC
    pub fn shmget(key: crate::key_t, size: size_t, shmflg: c_int) -> c_int;
    pub fn shmat(shmid: c_int, shmaddr: *const c_void, shmflg: c_int) -> *mut c_void;
    pub fn shmdt(shmaddr: *const c_void) -> c_int;
    #[cfg_attr(gnu_time_bits64, link_name = "__shmctl64")]
    pub fn shmctl(shmid: c_int, cmd: c_int, buf: *mut crate::shmid_ds) -> c_int;
    pub fn ftok(pathname: *const c_char, proj_id: c_int) -> crate::key_t;
    pub fn semget(key: crate::key_t, nsems: c_int, semflag: c_int) -> c_int;
    pub fn semop(semid: c_int, sops: *mut crate::sembuf, nsops: size_t) -> c_int;
    #[cfg_attr(gnu_time_bits64, link_name = "__semctl64")]
    pub fn semctl(semid: c_int, semnum: c_int, cmd: c_int, ...) -> c_int;
    #[cfg_attr(gnu_time_bits64, link_name = "__msgctl64")]
    pub fn msgctl(msqid: c_int, cmd: c_int, buf: *mut msqid_ds) -> c_int;
    pub fn msgget(key: crate::key_t, msgflg: c_int) -> c_int;
    pub fn msgrcv(
        msqid: c_int,
        msgp: *mut c_void,
        msgsz: size_t,
        msgtyp: c_long,
        msgflg: c_int,
    ) -> ssize_t;
    pub fn msgsnd(msqid: c_int, msgp: *const c_void, msgsz: size_t, msgflg: c_int) -> c_int;

    pub fn mprotect(addr: *mut c_void, len: size_t, prot: c_int) -> c_int;
    pub fn __errno_location() -> *mut c_int;

    #[cfg_attr(gnu_file_offset_bits64, link_name = "fallocate64")]
    pub fn fallocate(fd: c_int, mode: c_int, offset: off_t, len: off_t) -> c_int;
    #[cfg_attr(gnu_file_offset_bits64, link_name = "posix_fallocate64")]
    pub fn posix_fallocate(fd: c_int, offset: off_t, len: off_t) -> c_int;
    pub fn readahead(fd: c_int, offset: off64_t, count: size_t) -> ssize_t;
    pub fn getxattr(
        path: *const c_char,
        name: *const c_char,
        value: *mut c_void,
        size: size_t,
    ) -> ssize_t;
    pub fn lgetxattr(
        path: *const c_char,
        name: *const c_char,
        value: *mut c_void,
        size: size_t,
    ) -> ssize_t;
    pub fn fgetxattr(
        filedes: c_int,
        name: *const c_char,
        value: *mut c_void,
        size: size_t,
    ) -> ssize_t;
    pub fn setxattr(
        path: *const c_char,
        name: *const c_char,
        value: *const c_void,
        size: size_t,
        flags: c_int,
    ) -> c_int;
    pub fn lsetxattr(
        path: *const c_char,
        name: *const c_char,
        value: *const c_void,
        size: size_t,
        flags: c_int,
    ) -> c_int;
    pub fn fsetxattr(
        filedes: c_int,
        name: *const c_char,
        value: *const c_void,
        size: size_t,
        flags: c_int,
    ) -> c_int;
    pub fn listxattr(path: *const c_char, list: *mut c_char, size: size_t) -> ssize_t;
    pub fn llistxattr(path: *const c_char, list: *mut c_char, size: size_t) -> ssize_t;
    pub fn flistxattr(filedes: c_int, list: *mut c_char, size: size_t) -> ssize_t;
    pub fn removexattr(path: *const c_char, name: *const c_char) -> c_int;
    pub fn lremovexattr(path: *const c_char, name: *const c_char) -> c_int;
    pub fn fremovexattr(filedes: c_int, name: *const c_char) -> c_int;
    pub fn signalfd(fd: c_int, mask: *const crate::sigset_t, flags: c_int) -> c_int;
    pub fn timerfd_create(clockid: crate::clockid_t, flags: c_int) -> c_int;
    #[cfg_attr(gnu_time_bits64, link_name = "__timerfd_gettime64")]
    pub fn timerfd_gettime(fd: c_int, curr_value: *mut itimerspec) -> c_int;
    #[cfg_attr(gnu_time_bits64, link_name = "__timerfd_settime64")]
    pub fn timerfd_settime(
        fd: c_int,
        flags: c_int,
        new_value: *const itimerspec,
        old_value: *mut itimerspec,
    ) -> c_int;
    pub fn quotactl(cmd: c_int, special: *const c_char, id: c_int, data: *mut c_char) -> c_int;
    pub fn epoll_pwait(
        epfd: c_int,
        events: *mut crate::epoll_event,
        maxevents: c_int,
        timeout: c_int,
        sigmask: *const crate::sigset_t,
    ) -> c_int;
    pub fn dup3(oldfd: c_int, newfd: c_int, flags: c_int) -> c_int;
    #[cfg_attr(gnu_time_bits64, link_name = "__sigtimedwait64")]
    pub fn sigtimedwait(
        set: *const sigset_t,
        info: *mut siginfo_t,
        timeout: *const crate::timespec,
    ) -> c_int;
    pub fn sigwaitinfo(set: *const sigset_t, info: *mut siginfo_t) -> c_int;
    pub fn nl_langinfo_l(item: crate::nl_item, locale: crate::locale_t) -> *mut c_char;
    pub fn accept4(
        fd: c_int,
        addr: *mut crate::sockaddr,
        len: *mut crate::socklen_t,
        flg: c_int,
    ) -> c_int;
    pub fn pthread_getaffinity_np(
        thread: crate::pthread_t,
        cpusetsize: size_t,
        cpuset: *mut crate::cpu_set_t,
    ) -> c_int;
    pub fn pthread_setaffinity_np(
        thread: crate::pthread_t,
        cpusetsize: size_t,
        cpuset: *const crate::cpu_set_t,
    ) -> c_int;
    pub fn pthread_setschedprio(native: crate::pthread_t, priority: c_int) -> c_int;
    pub fn reboot(how_to: c_int) -> c_int;
    pub fn setfsgid(gid: crate::gid_t) -> c_int;
    pub fn setfsuid(uid: crate::uid_t) -> c_int;

    // Not available now on Android
    pub fn mkfifoat(dirfd: c_int, pathname: *const c_char, mode: mode_t) -> c_int;
    pub fn if_nameindex() -> *mut if_nameindex;
    pub fn if_freenameindex(ptr: *mut if_nameindex);
    pub fn sync_file_range(fd: c_int, offset: off64_t, nbytes: off64_t, flags: c_uint) -> c_int;
    pub fn mremap(
        addr: *mut c_void,
        len: size_t,
        new_len: size_t,
        flags: c_int,
        ...
    ) -> *mut c_void;

    #[cfg_attr(gnu_time_bits64, link_name = "__glob64_time64")]
    #[cfg_attr(
        all(not(gnu_time_bits64), gnu_file_offset_bits64),
        link_name = "glob64"
    )]
    pub fn glob(
        pattern: *const c_char,
        flags: c_int,
        errfunc: Option<extern "C" fn(epath: *const c_char, errno: c_int) -> c_int>,
        pglob: *mut crate::glob_t,
    ) -> c_int;
    #[cfg_attr(gnu_time_bits64, link_name = "__globfree64_time64")]
    #[cfg_attr(
        all(not(gnu_time_bits64), gnu_file_offset_bits64),
        link_name = "globfree64"
    )]
    pub fn globfree(pglob: *mut crate::glob_t);

    pub fn posix_madvise(addr: *mut c_void, len: size_t, advice: c_int) -> c_int;

    pub fn seekdir(dirp: *mut crate::DIR, loc: c_long);

    pub fn telldir(dirp: *mut crate::DIR) -> c_long;
    pub fn madvise(addr: *mut c_void, len: size_t, advice: c_int) -> c_int;

    pub fn msync(addr: *mut c_void, len: size_t, flags: c_int) -> c_int;
    pub fn remap_file_pages(
        addr: *mut c_void,
        size: size_t,
        prot: c_int,
        pgoff: size_t,
        flags: c_int,
    ) -> c_int;
    pub fn recvfrom(
        socket: c_int,
        buf: *mut c_void,
        len: size_t,
        flags: c_int,
        addr: *mut crate::sockaddr,
        addrlen: *mut crate::socklen_t,
    ) -> ssize_t;
    #[cfg_attr(gnu_file_offset_bits64, link_name = "mkstemps64")]
    pub fn mkstemps(template: *mut c_char, suffixlen: c_int) -> c_int;

    pub fn nl_langinfo(item: crate::nl_item) -> *mut c_char;

    pub fn vhangup() -> c_int;
    pub fn sync();
    pub fn syncfs(fd: c_int) -> c_int;
    pub fn syscall(num: c_long, ...) -> c_long;
    pub fn sched_getaffinity(
        pid: crate::pid_t,
        cpusetsize: size_t,
        cpuset: *mut cpu_set_t,
    ) -> c_int;
    pub fn sched_setaffinity(
        pid: crate::pid_t,
        cpusetsize: size_t,
        cpuset: *const cpu_set_t,
    ) -> c_int;
    pub fn epoll_create(size: c_int) -> c_int;
    pub fn epoll_create1(flags: c_int) -> c_int;
    pub fn epoll_wait(
        epfd: c_int,
        events: *mut crate::epoll_event,
        maxevents: c_int,
        timeout: c_int,
    ) -> c_int;
    pub fn epoll_ctl(epfd: c_int, op: c_int, fd: c_int, event: *mut crate::epoll_event) -> c_int;
    pub fn pthread_getschedparam(
        native: crate::pthread_t,
        policy: *mut c_int,
        param: *mut crate::sched_param,
    ) -> c_int;
    pub fn unshare(flags: c_int) -> c_int;
    pub fn umount(target: *const c_char) -> c_int;
    pub fn sched_get_priority_max(policy: c_int) -> c_int;
    pub fn tee(fd_in: c_int, fd_out: c_int, len: size_t, flags: c_uint) -> ssize_t;
    #[cfg_attr(gnu_time_bits64, link_name = "__settimeofday64")]
    pub fn settimeofday(tv: *const crate::timeval, tz: *const crate::timezone) -> c_int;
    pub fn splice(
        fd_in: c_int,
        off_in: *mut crate::loff_t,
        fd_out: c_int,
        off_out: *mut crate::loff_t,
        len: size_t,
        flags: c_uint,
    ) -> ssize_t;
    pub fn eventfd(init: c_uint, flags: c_int) -> c_int;
    pub fn eventfd_read(fd: c_int, value: *mut eventfd_t) -> c_int;
    pub fn eventfd_write(fd: c_int, value: eventfd_t) -> c_int;

    #[cfg_attr(gnu_time_bits64, link_name = "__sched_rr_get_interval64")]
    pub fn sched_rr_get_interval(pid: crate::pid_t, tp: *mut crate::timespec) -> c_int;
    #[cfg_attr(gnu_time_bits64, link_name = "__sem_timedwait64")]
    pub fn sem_timedwait(sem: *mut sem_t, abstime: *const crate::timespec) -> c_int;
    pub fn sem_getvalue(sem: *mut sem_t, sval: *mut c_int) -> c_int;
    pub fn sched_setparam(pid: crate::pid_t, param: *const crate::sched_param) -> c_int;
    pub fn setns(fd: c_int, nstype: c_int) -> c_int;
    pub fn swapoff(path: *const c_char) -> c_int;
    pub fn vmsplice(fd: c_int, iov: *const crate::iovec, nr_segs: size_t, flags: c_uint)
        -> ssize_t;
    pub fn mount(
        src: *const c_char,
        target: *const c_char,
        fstype: *const c_char,
        flags: c_ulong,
        data: *const c_void,
    ) -> c_int;
    pub fn personality(persona: c_ulong) -> c_int;
    #[cfg_attr(gnu_time_bits64, link_name = "__prctl_time64")]
    pub fn prctl(option: c_int, ...) -> c_int;
    pub fn sched_getparam(pid: crate::pid_t, param: *mut crate::sched_param) -> c_int;
    #[cfg_attr(gnu_time_bits64, link_name = "__ppoll64")]
    pub fn ppoll(
        fds: *mut crate::pollfd,
        nfds: nfds_t,
        timeout: *const crate::timespec,
        sigmask: *const sigset_t,
    ) -> c_int;
    pub fn pthread_mutexattr_getprotocol(
        attr: *const pthread_mutexattr_t,
        protocol: *mut c_int,
    ) -> c_int;
    pub fn pthread_mutexattr_setprotocol(attr: *mut pthread_mutexattr_t, protocol: c_int) -> c_int;

    #[cfg_attr(gnu_time_bits64, link_name = "__pthread_mutex_timedlock64")]
    pub fn pthread_mutex_timedlock(
        lock: *mut pthread_mutex_t,
        abstime: *const crate::timespec,
    ) -> c_int;
    pub fn pthread_barrierattr_init(attr: *mut crate::pthread_barrierattr_t) -> c_int;
    pub fn pthread_barrierattr_destroy(attr: *mut crate::pthread_barrierattr_t) -> c_int;
    pub fn pthread_barrierattr_getpshared(
        attr: *const crate::pthread_barrierattr_t,
        shared: *mut c_int,
    ) -> c_int;
    pub fn pthread_barrierattr_setpshared(
        attr: *mut crate::pthread_barrierattr_t,
        shared: c_int,
    ) -> c_int;
    pub fn pthread_barrier_init(
        barrier: *mut pthread_barrier_t,
        attr: *const crate::pthread_barrierattr_t,
        count: c_uint,
    ) -> c_int;
    pub fn pthread_barrier_destroy(barrier: *mut pthread_barrier_t) -> c_int;
    pub fn pthread_barrier_wait(barrier: *mut pthread_barrier_t) -> c_int;
    pub fn pthread_spin_init(lock: *mut crate::pthread_spinlock_t, pshared: c_int) -> c_int;
    pub fn pthread_spin_destroy(lock: *mut crate::pthread_spinlock_t) -> c_int;
    pub fn pthread_spin_lock(lock: *mut crate::pthread_spinlock_t) -> c_int;
    pub fn pthread_spin_trylock(lock: *mut crate::pthread_spinlock_t) -> c_int;
    pub fn pthread_spin_unlock(lock: *mut crate::pthread_spinlock_t) -> c_int;
    pub fn clone(
        cb: extern "C" fn(*mut c_void) -> c_int,
        child_stack: *mut c_void,
        flags: c_int,
        arg: *mut c_void,
        ...
    ) -> c_int;
    pub fn sched_getscheduler(pid: crate::pid_t) -> c_int;
    #[cfg_attr(gnu_time_bits64, link_name = "__clock_nanosleep_time64")]
    pub fn clock_nanosleep(
        clk_id: crate::clockid_t,
        flags: c_int,
        rqtp: *const crate::timespec,
        rmtp: *mut crate::timespec,
    ) -> c_int;
    pub fn pthread_attr_getguardsize(
        attr: *const crate::pthread_attr_t,
        guardsize: *mut size_t,
    ) -> c_int;
    pub fn pthread_attr_setguardsize(attr: *mut crate::pthread_attr_t, guardsize: size_t) -> c_int;
    pub fn pthread_attr_getinheritsched(
        attr: *const crate::pthread_attr_t,
        inheritsched: *mut c_int,
    ) -> c_int;
    pub fn pthread_attr_setinheritsched(
        attr: *mut crate::pthread_attr_t,
        inheritsched: c_int,
    ) -> c_int;
    pub fn pthread_attr_getschedpolicy(
        attr: *const crate::pthread_attr_t,
        policy: *mut c_int,
    ) -> c_int;
    pub fn pthread_attr_setschedpolicy(attr: *mut crate::pthread_attr_t, policy: c_int) -> c_int;
    pub fn pthread_attr_getschedparam(
        attr: *const crate::pthread_attr_t,
        param: *mut crate::sched_param,
    ) -> c_int;
    pub fn pthread_attr_setschedparam(
        attr: *mut crate::pthread_attr_t,
        param: *const crate::sched_param,
    ) -> c_int;
    pub fn sethostname(name: *const c_char, len: size_t) -> c_int;
    pub fn sched_get_priority_min(policy: c_int) -> c_int;
    pub fn pthread_condattr_getpshared(
        attr: *const pthread_condattr_t,
        pshared: *mut c_int,
    ) -> c_int;
    pub fn sysinfo(info: *mut crate::sysinfo) -> c_int;
    pub fn umount2(target: *const c_char, flags: c_int) -> c_int;
    pub fn pthread_setschedparam(
        native: crate::pthread_t,
        policy: c_int,
        param: *const crate::sched_param,
    ) -> c_int;
    pub fn swapon(path: *const c_char, swapflags: c_int) -> c_int;
    pub fn sched_setscheduler(
        pid: crate::pid_t,
        policy: c_int,
        param: *const crate::sched_param,
    ) -> c_int;
    #[cfg_attr(gnu_file_offset_bits64, link_name = "sendfile64")]
    pub fn sendfile(out_fd: c_int, in_fd: c_int, offset: *mut off_t, count: size_t) -> ssize_t;
    pub fn sigsuspend(mask: *const crate::sigset_t) -> c_int;
    pub fn getgrgid_r(
        gid: crate::gid_t,
        grp: *mut crate::group,
        buf: *mut c_char,
        buflen: size_t,
        result: *mut *mut crate::group,
    ) -> c_int;
    pub fn sigaltstack(ss: *const stack_t, oss: *mut stack_t) -> c_int;
    pub fn sem_close(sem: *mut sem_t) -> c_int;
    pub fn getdtablesize() -> c_int;
    pub fn getgrnam_r(
        name: *const c_char,
        grp: *mut crate::group,
        buf: *mut c_char,
        buflen: size_t,
        result: *mut *mut crate::group,
    ) -> c_int;
    pub fn initgroups(user: *const c_char, group: crate::gid_t) -> c_int;
    pub fn pthread_sigmask(how: c_int, set: *const sigset_t, oldset: *mut sigset_t) -> c_int;
    pub fn sem_open(name: *const c_char, oflag: c_int, ...) -> *mut sem_t;
    pub fn getgrnam(name: *const c_char) -> *mut crate::group;
    pub fn pthread_kill(thread: crate::pthread_t, sig: c_int) -> c_int;
    pub fn sem_unlink(name: *const c_char) -> c_int;
    pub fn daemon(nochdir: c_int, noclose: c_int) -> c_int;
    pub fn getpwnam_r(
        name: *const c_char,
        pwd: *mut passwd,
        buf: *mut c_char,
        buflen: size_t,
        result: *mut *mut passwd,
    ) -> c_int;
    pub fn getpwuid_r(
        uid: crate::uid_t,
        pwd: *mut passwd,
        buf: *mut c_char,
        buflen: size_t,
        result: *mut *mut passwd,
    ) -> c_int;
    pub fn sigwait(set: *const sigset_t, sig: *mut c_int) -> c_int;
    pub fn pthread_atfork(
        prepare: Option<unsafe extern "C" fn()>,
        parent: Option<unsafe extern "C" fn()>,
        child: Option<unsafe extern "C" fn()>,
    ) -> c_int;
    pub fn getgrgid(gid: crate::gid_t) -> *mut crate::group;
    pub fn getgrouplist(
        user: *const c_char,
        group: crate::gid_t,
        groups: *mut crate::gid_t,
        ngroups: *mut c_int,
    ) -> c_int;
    pub fn pthread_mutexattr_getpshared(
        attr: *const pthread_mutexattr_t,
        pshared: *mut c_int,
    ) -> c_int;
    pub fn popen(command: *const c_char, mode: *const c_char) -> *mut crate::FILE;
    pub fn faccessat(dirfd: c_int, pathname: *const c_char, mode: c_int, flags: c_int) -> c_int;
    pub fn pthread_create(
        native: *mut crate::pthread_t,
        attr: *const crate::pthread_attr_t,
        f: extern "C" fn(*mut c_void) -> *mut c_void,
        value: *mut c_void,
    ) -> c_int;
    pub fn dl_iterate_phdr(
        callback: Option<
            unsafe extern "C" fn(
                info: *mut crate::dl_phdr_info,
                size: size_t,
                data: *mut c_void,
            ) -> c_int,
        >,
        data: *mut c_void,
    ) -> c_int;

    pub fn setmntent(filename: *const c_char, ty: *const c_char) -> *mut crate::FILE;
    pub fn getmntent(stream: *mut crate::FILE) -> *mut crate::mntent;
    pub fn addmntent(stream: *mut crate::FILE, mnt: *const crate::mntent) -> c_int;
    pub fn endmntent(streamp: *mut crate::FILE) -> c_int;
    pub fn hasmntopt(mnt: *const crate::mntent, opt: *const c_char) -> *mut c_char;

    pub fn posix_spawn(
        pid: *mut crate::pid_t,
        path: *const c_char,
        file_actions: *const crate::posix_spawn_file_actions_t,
        attrp: *const crate::posix_spawnattr_t,
        argv: *const *mut c_char,
        envp: *const *mut c_char,
    ) -> c_int;
    pub fn posix_spawnp(
        pid: *mut crate::pid_t,
        file: *const c_char,
        file_actions: *const crate::posix_spawn_file_actions_t,
        attrp: *const crate::posix_spawnattr_t,
        argv: *const *mut c_char,
        envp: *const *mut c_char,
    ) -> c_int;
    pub fn posix_spawnattr_init(attr: *mut posix_spawnattr_t) -> c_int;
    pub fn posix_spawnattr_destroy(attr: *mut posix_spawnattr_t) -> c_int;
    pub fn posix_spawnattr_getsigdefault(
        attr: *const posix_spawnattr_t,
        default: *mut crate::sigset_t,
    ) -> c_int;
    pub fn posix_spawnattr_setsigdefault(
        attr: *mut posix_spawnattr_t,
        default: *const crate::sigset_t,
    ) -> c_int;
    pub fn posix_spawnattr_getsigmask(
        attr: *const posix_spawnattr_t,
        default: *mut crate::sigset_t,
    ) -> c_int;
    pub fn posix_spawnattr_setsigmask(
        attr: *mut posix_spawnattr_t,
        default: *const crate::sigset_t,
    ) -> c_int;
    pub fn posix_spawnattr_getflags(attr: *const posix_spawnattr_t, flags: *mut c_short) -> c_int;
    pub fn posix_spawnattr_setflags(attr: *mut posix_spawnattr_t, flags: c_short) -> c_int;
    pub fn posix_spawnattr_getpgroup(
        attr: *const posix_spawnattr_t,
        flags: *mut crate::pid_t,
    ) -> c_int;
    pub fn posix_spawnattr_setpgroup(attr: *mut posix_spawnattr_t, flags: crate::pid_t) -> c_int;
    pub fn posix_spawnattr_getschedpolicy(
        attr: *const posix_spawnattr_t,
        flags: *mut c_int,
    ) -> c_int;
    pub fn posix_spawnattr_setschedpolicy(attr: *mut posix_spawnattr_t, flags: c_int) -> c_int;
    pub fn posix_spawnattr_getschedparam(
        attr: *const posix_spawnattr_t,
        param: *mut crate::sched_param,
    ) -> c_int;
    pub fn posix_spawnattr_setschedparam(
        attr: *mut posix_spawnattr_t,
        param: *const crate::sched_param,
    ) -> c_int;

    pub fn posix_spawn_file_actions_init(actions: *mut posix_spawn_file_actions_t) -> c_int;
    pub fn posix_spawn_file_actions_destroy(actions: *mut posix_spawn_file_actions_t) -> c_int;
    pub fn posix_spawn_file_actions_addopen(
        actions: *mut posix_spawn_file_actions_t,
        fd: c_int,
        path: *const c_char,
        oflag: c_int,
        mode: mode_t,
    ) -> c_int;
    pub fn posix_spawn_file_actions_addclose(
        actions: *mut posix_spawn_file_actions_t,
        fd: c_int,
    ) -> c_int;
    pub fn posix_spawn_file_actions_adddup2(
        actions: *mut posix_spawn_file_actions_t,
        fd: c_int,
        newfd: c_int,
    ) -> c_int;
    pub fn fread_unlocked(
        buf: *mut c_void,
        size: size_t,
        nobj: size_t,
        stream: *mut crate::FILE,
    ) -> size_t;
    pub fn inotify_rm_watch(fd: c_int, wd: c_int) -> c_int;
    pub fn inotify_init() -> c_int;
    pub fn inotify_init1(flags: c_int) -> c_int;
    pub fn inotify_add_watch(fd: c_int, path: *const c_char, mask: u32) -> c_int;
    pub fn fanotify_init(flags: c_uint, event_f_flags: c_uint) -> c_int;

    pub fn regcomp(preg: *mut crate::regex_t, pattern: *const c_char, cflags: c_int) -> c_int;

    pub fn regexec(
        preg: *const crate::regex_t,
        input: *const c_char,
        nmatch: size_t,
        pmatch: *mut regmatch_t,
        eflags: c_int,
    ) -> c_int;

    pub fn regerror(
        errcode: c_int,
        preg: *const crate::regex_t,
        errbuf: *mut c_char,
        errbuf_size: size_t,
    ) -> size_t;

    pub fn regfree(preg: *mut crate::regex_t);

    pub fn iconv_open(tocode: *const c_char, fromcode: *const c_char) -> iconv_t;
    pub fn iconv(
        cd: iconv_t,
        inbuf: *mut *mut c_char,
        inbytesleft: *mut size_t,
        outbuf: *mut *mut c_char,
        outbytesleft: *mut size_t,
    ) -> size_t;
    pub fn iconv_close(cd: iconv_t) -> c_int;

    pub fn gettid() -> crate::pid_t;

    pub fn timer_create(
        clockid: crate::clockid_t,
        sevp: *mut crate::sigevent,
        timerid: *mut crate::timer_t,
    ) -> c_int;
    pub fn timer_delete(timerid: crate::timer_t) -> c_int;
    pub fn timer_getoverrun(timerid: crate::timer_t) -> c_int;
    #[cfg_attr(gnu_time_bits64, link_name = "__timer_gettime64")]
    pub fn timer_gettime(timerid: crate::timer_t, curr_value: *mut crate::itimerspec) -> c_int;
    #[cfg_attr(gnu_time_bits64, link_name = "__timer_settime64")]
    pub fn timer_settime(
        timerid: crate::timer_t,
        flags: c_int,
        new_value: *const crate::itimerspec,
        old_value: *mut crate::itimerspec,
    ) -> c_int;

    pub fn gethostid() -> c_long;

    pub fn pthread_getcpuclockid(thread: crate::pthread_t, clk_id: *mut crate::clockid_t) -> c_int;
    pub fn memmem(
        haystack: *const c_void,
        haystacklen: size_t,
        needle: *const c_void,
        needlelen: size_t,
    ) -> *mut c_void;
    pub fn sched_getcpu() -> c_int;

    pub fn pthread_getname_np(thread: crate::pthread_t, name: *mut c_char, len: size_t) -> c_int;
    pub fn pthread_setname_np(thread: crate::pthread_t, name: *const c_char) -> c_int;
    pub fn getopt_long(
        argc: c_int,
        argv: *const *mut c_char,
        optstring: *const c_char,
        longopts: *const option,
        longindex: *mut c_int,
    ) -> c_int;

    pub fn pthread_once(control: *mut pthread_once_t, routine: extern "C" fn()) -> c_int;

    pub fn copy_file_range(
        fd_in: c_int,
        off_in: *mut off64_t,
        fd_out: c_int,
        off_out: *mut off64_t,
        len: size_t,
        flags: c_uint,
    ) -> ssize_t;

    pub fn klogctl(syslog_type: c_int, bufp: *mut c_char, len: c_int) -> c_int;
}

// LFS64 extensions
//
// * musl has 64-bit versions only so aliases the LFS64 symbols to the standard ones
cfg_if! {
    if #[cfg(not(target_env = "musl"))] {
        extern "C" {
            pub fn fallocate64(fd: c_int, mode: c_int, offset: off64_t, len: off64_t) -> c_int;
            pub fn fgetpos64(stream: *mut crate::FILE, ptr: *mut fpos64_t) -> c_int;
            pub fn fopen64(filename: *const c_char, mode: *const c_char) -> *mut crate::FILE;
            pub fn freopen64(
                filename: *const c_char,
                mode: *const c_char,
                file: *mut crate::FILE,
            ) -> *mut crate::FILE;
            pub fn fseeko64(stream: *mut crate::FILE, offset: off64_t, whence: c_int) -> c_int;
            pub fn fsetpos64(stream: *mut crate::FILE, ptr: *const fpos64_t) -> c_int;
            pub fn ftello64(stream: *mut crate::FILE) -> off64_t;
            pub fn posix_fallocate64(fd: c_int, offset: off64_t, len: off64_t) -> c_int;
            pub fn sendfile64(
                out_fd: c_int,
                in_fd: c_int,
                offset: *mut off64_t,
                count: size_t,
            ) -> ssize_t;
            pub fn tmpfile64() -> *mut crate::FILE;
        }
    }
}

cfg_if! {
    if #[cfg(target_env = "uclibc")] {
        mod uclibc;
        pub use self::uclibc::*;
    } else if #[cfg(any(target_env = "musl", target_env = "ohos"))] {
        mod musl;
        pub use self::musl::*;
    } else if #[cfg(target_env = "gnu")] {
        mod gnu;
        pub use self::gnu::*;
    }
}

mod arch;
pub use self::arch::*;
