# mod.rs - source
Source of the Rust file `/home/key/.cargo/registry/src/github.com-1ecc6299db9ec823/libc-0.2.131/src/unix/linux_like/linux/gnu/mod.rs`.
Keywords: rust, rustlang, rust-lang

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    pub type pthread_t = c_ulong;
    pub type __priority_which_t = ::c_uint;
    pub type __rlimit_resource_t = ::c_uint;
    pub type Lmid_t = ::c_long;
    pub type regoff_t = ::c_int;

    cfg_if! {
        if #[cfg(doc)] {
            // Used in `linux::arch` to define ioctl constants.
            pub(crate) type Ioctl = ::c_ulong;
        } else {
            #[doc(hidden)]
            pub type Ioctl = ::c_ulong;
        }
    }

    s! {
        pub struct statx {
            pub stx_mask: u32,
            pub stx_blksize: u32,
            pub stx_attributes: u64,
            pub stx_nlink: u32,
            pub stx_uid: u32,
            pub stx_gid: u32,
            pub stx_mode: u16,
            __statx_pad1: [u16; 1],
            pub stx_ino: u64,
            pub stx_size: u64,
            pub stx_blocks: u64,
            pub stx_attributes_mask: u64,
            pub stx_atime: ::statx_timestamp,
            pub stx_btime: ::statx_timestamp,
            pub stx_ctime: ::statx_timestamp,
            pub stx_mtime: ::statx_timestamp,
            pub stx_rdev_major: u32,
            pub stx_rdev_minor: u32,
            pub stx_dev_major: u32,
            pub stx_dev_minor: u32,
            pub stx_mnt_id: u64,
            __statx_pad2: u64,
            __statx_pad3: [u64; 12],
        }

        pub struct statx_timestamp {
            pub tv_sec: i64,
            pub tv_nsec: u32,
            pub __statx_timestamp_pad1: [i32; 1],
        }

        pub struct aiocb {
            pub aio_fildes: ::c_int,
            pub aio_lio_opcode: ::c_int,
            pub aio_reqprio: ::c_int,
            pub aio_buf: *mut ::c_void,
            pub aio_nbytes: ::size_t,
            pub aio_sigevent: ::sigevent,
            __next_prio: *mut aiocb,
            __abs_prio: ::c_int,
            __policy: ::c_int,
            __error_code: ::c_int,
            __return_value: ::ssize_t,
            pub aio_offset: off_t,
            #[cfg(all(not(target_arch = "x86_64"), target_pointer_width = "32"))]
            __unused1: [::c_char; 4],
            __glibc_reserved: [::c_char; 32]
        }

        pub struct __exit_status {
            pub e_termination: ::c_short,
            pub e_exit: ::c_short,
        }

        pub struct __timeval {
            pub tv_sec: i32,
            pub tv_usec: i32,
        }

        pub struct glob64_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 msghdr {
            pub msg_name: *mut ::c_void,
            pub msg_namelen: ::socklen_t,
            pub msg_iov: *mut ::iovec,
            pub msg_iovlen: ::size_t,
            pub msg_control: *mut ::c_void,
            pub msg_controllen: ::size_t,
            pub msg_flags: ::c_int,
        }

        pub struct cmsghdr {
            pub cmsg_len: ::size_t,
            pub cmsg_level: ::c_int,
            pub cmsg_type: ::c_int,
        }

        pub struct termios {
            pub c_iflag: ::tcflag_t,
            pub c_oflag: ::tcflag_t,
            pub c_cflag: ::tcflag_t,
            pub c_lflag: ::tcflag_t,
            pub c_line: ::cc_t,
            pub c_cc: [::cc_t; ::NCCS],
            #[cfg(not(any(
                target_arch = "sparc",
                target_arch = "sparc64",
                target_arch = "mips",
                target_arch = "mips64")))]
            pub c_ispeed: ::speed_t,
            #[cfg(not(any(
                target_arch = "sparc",
                target_arch = "sparc64",
                target_arch = "mips",
                target_arch = "mips64")))]
            pub c_ospeed: ::speed_t,
        }

        pub struct mallinfo {
            pub arena: ::c_int,
            pub ordblks: ::c_int,
            pub smblks: ::c_int,
            pub hblks: ::c_int,
            pub hblkhd: ::c_int,
            pub usmblks: ::c_int,
            pub fsmblks: ::c_int,
            pub uordblks: ::c_int,
            pub fordblks: ::c_int,
            pub keepcost: ::c_int,
        }

        pub struct mallinfo2 {
            pub arena: ::size_t,
            pub ordblks: ::size_t,
            pub smblks: ::size_t,
            pub hblks: ::size_t,
            pub hblkhd: ::size_t,
            pub usmblks: ::size_t,
            pub fsmblks: ::size_t,
            pub uordblks: ::size_t,
            pub fordblks: ::size_t,
            pub keepcost: ::size_t,
        }

        pub struct nl_pktinfo {
            pub group: u32,
        }

        pub struct nl_mmap_req {
            pub nm_block_size: ::c_uint,
            pub nm_block_nr: ::c_uint,
            pub nm_frame_size: ::c_uint,
            pub nm_frame_nr: ::c_uint,
        }

        pub struct nl_mmap_hdr {
            pub nm_status: ::c_uint,
            pub nm_len: ::c_uint,
            pub nm_group: u32,
            pub nm_pid: u32,
            pub nm_uid: u32,
            pub nm_gid: u32,
        }

        pub struct rtentry {
            pub rt_pad1: ::c_ulong,
            pub rt_dst: ::sockaddr,
            pub rt_gateway: ::sockaddr,
            pub rt_genmask: ::sockaddr,
            pub rt_flags: ::c_ushort,
            pub rt_pad2: ::c_short,
            pub rt_pad3: ::c_ulong,
            pub rt_tos: ::c_uchar,
            pub rt_class: ::c_uchar,
            #[cfg(target_pointer_width = "64")]
            pub rt_pad4: [::c_short; 3usize],
            #[cfg(not(target_pointer_width = "64"))]
            pub rt_pad4: ::c_short,
            pub rt_metric: ::c_short,
            pub rt_dev: *mut ::c_char,
            pub rt_mtu: ::c_ulong,
            pub rt_window: ::c_ulong,
            pub rt_irtt: ::c_ushort,
        }

        pub struct timex {
            pub modes: ::c_uint,
            #[cfg(all(target_arch = "x86_64", target_pointer_width = "32"))]
            pub offset: i64,
            #[cfg(not(all(target_arch = "x86_64", target_pointer_width = "32")))]
            pub offset: ::c_long,
            #[cfg(all(target_arch = "x86_64", target_pointer_width = "32"))]
            pub freq: i64,
            #[cfg(not(all(target_arch = "x86_64", target_pointer_width = "32")))]
            pub freq: ::c_long,
            #[cfg(all(target_arch = "x86_64", target_pointer_width = "32"))]
            pub maxerror: i64,
            #[cfg(not(all(target_arch = "x86_64", target_pointer_width = "32")))]
            pub maxerror: ::c_long,
            #[cfg(all(target_arch = "x86_64", target_pointer_width = "32"))]
            pub esterror: i64,
            #[cfg(not(all(target_arch = "x86_64", target_pointer_width = "32")))]
            pub esterror: ::c_long,
            pub status: ::c_int,
            #[cfg(all(target_arch = "x86_64", target_pointer_width = "32"))]
            pub constant: i64,
            #[cfg(not(all(target_arch = "x86_64", target_pointer_width = "32")))]
            pub constant: ::c_long,
            #[cfg(all(target_arch = "x86_64", target_pointer_width = "32"))]
            pub precision: i64,
            #[cfg(not(all(target_arch = "x86_64", target_pointer_width = "32")))]
            pub precision: ::c_long,
            #[cfg(all(target_arch = "x86_64", target_pointer_width = "32"))]
            pub tolerance: i64,
            #[cfg(not(all(target_arch = "x86_64", target_pointer_width = "32")))]
            pub tolerance: ::c_long,
            pub time: ::timeval,
            #[cfg(all(target_arch = "x86_64", target_pointer_width = "32"))]
            pub tick: i64,
            #[cfg(not(all(target_arch = "x86_64", target_pointer_width = "32")))]
            pub tick: ::c_long,
            #[cfg(all(target_arch = "x86_64", target_pointer_width = "32"))]
            pub ppsfreq: i64,
            #[cfg(not(all(target_arch = "x86_64", target_pointer_width = "32")))]
            pub ppsfreq: ::c_long,
            #[cfg(all(target_arch = "x86_64", target_pointer_width = "32"))]
            pub jitter: i64,
            #[cfg(not(all(target_arch = "x86_64", target_pointer_width = "32")))]
            pub jitter: ::c_long,
            pub shift: ::c_int,
            #[cfg(all(target_arch = "x86_64", target_pointer_width = "32"))]
            pub stabil: i64,
            #[cfg(not(all(target_arch = "x86_64", target_pointer_width = "32")))]
            pub stabil: ::c_long,
            #[cfg(all(target_arch = "x86_64", target_pointer_width = "32"))]
            pub jitcnt: i64,
            #[cfg(not(all(target_arch = "x86_64", target_pointer_width = "32")))]
            pub jitcnt: ::c_long,
            #[cfg(all(target_arch = "x86_64", target_pointer_width = "32"))]
            pub calcnt: i64,
            #[cfg(not(all(target_arch = "x86_64", target_pointer_width = "32")))]
            pub calcnt: ::c_long,
            #[cfg(all(target_arch = "x86_64", target_pointer_width = "32"))]
            pub errcnt: i64,
            #[cfg(not(all(target_arch = "x86_64", target_pointer_width = "32")))]
            pub errcnt: ::c_long,
            #[cfg(all(target_arch = "x86_64", target_pointer_width = "32"))]
            pub stbcnt: i64,
            #[cfg(not(all(target_arch = "x86_64", target_pointer_width = "32")))]
            pub stbcnt: ::c_long,
            pub tai: ::c_int,
            pub __unused1: i32,
            pub __unused2: i32,
            pub __unused3: i32,
            pub __unused4: i32,
            pub __unused5: i32,
            pub __unused6: i32,
            pub __unused7: i32,
            pub __unused8: i32,
            pub __unused9: i32,
            pub __unused10: i32,
            pub __unused11: i32,
        }

        pub struct ntptimeval {
            pub time: ::timeval,
            pub maxerror: ::c_long,
            pub esterror: ::c_long,
            pub tai: ::c_long,
            pub __glibc_reserved1: ::c_long,
            pub __glibc_reserved2: ::c_long,
            pub __glibc_reserved3: ::c_long,
            pub __glibc_reserved4: ::c_long,
        }

        pub struct regex_t {
            __buffer: *mut ::c_void,
            __allocated: ::size_t,
            __used: ::size_t,
            __syntax: ::c_ulong,
            __fastmap: *mut ::c_char,
            __translate: *mut ::c_char,
            __re_nsub: ::size_t,
            __bitfield: u8,
        }

        pub struct Elf64_Chdr {
            pub ch_type: ::Elf64_Word,
            pub ch_reserved: ::Elf64_Word,
            pub ch_size: ::Elf64_Xword,
            pub ch_addralign: ::Elf64_Xword,
        }

        pub struct Elf32_Chdr {
            pub ch_type: ::Elf32_Word,
            pub ch_size: ::Elf32_Word,
            pub ch_addralign: ::Elf32_Word,
        }

        pub struct seminfo {
            pub semmap: ::c_int,
            pub semmni: ::c_int,
            pub semmns: ::c_int,
            pub semmnu: ::c_int,
            pub semmsl: ::c_int,
            pub semopm: ::c_int,
            pub semume: ::c_int,
            pub semusz: ::c_int,
            pub semvmx: ::c_int,
            pub semaem: ::c_int,
        }

        pub struct ptrace_peeksiginfo_args {
            pub off: ::__u64,
            pub flags: ::__u32,
            pub nr: ::__s32,
        }

        pub struct __c_anonymous_ptrace_syscall_info_entry {
            pub nr: ::__u64,
            pub args: [::__u64; 6],
        }

        pub struct __c_anonymous_ptrace_syscall_info_exit {
            pub sval: ::__s64,
            pub is_error: ::__u8,
        }

        pub struct __c_anonymous_ptrace_syscall_info_seccomp {
            pub nr: ::__u64,
            pub args: [::__u64; 6],
            pub ret_data: ::__u32,
        }

        pub struct ptrace_syscall_info {
            pub op: ::__u8,
            pub pad: [::__u8; 3],
            pub arch: ::__u32,
            pub instruction_pointer: ::__u64,
            pub stack_pointer: ::__u64,
            #[cfg(libc_union)]
            pub u: __c_anonymous_ptrace_syscall_info_data,
        }
    }

    impl siginfo_t {
        pub unsafe fn si_addr(&self) -> *mut ::c_void {
            #[repr(C)]
            struct siginfo_sigfault {
                _si_signo: ::c_int,
                _si_errno: ::c_int,
                _si_code: ::c_int,
                si_addr: *mut ::c_void,
            }
            (*(self as *const siginfo_t as *const siginfo_sigfault)).si_addr
        }

        pub unsafe fn si_value(&self) -> ::sigval {
            #[repr(C)]
            struct siginfo_timer {
                _si_signo: ::c_int,
                _si_errno: ::c_int,
                _si_code: ::c_int,
                _si_tid: ::c_int,
                _si_overrun: ::c_int,
                si_sigval: ::sigval,
            }
            (*(self as *const siginfo_t as *const siginfo_timer)).si_sigval
        }
    }

    cfg_if! {
        if #[cfg(libc_union)] {
            // Internal, for casts to access union fields
            #[repr(C)]
            struct sifields_sigchld {
                si_pid: ::pid_t,
                si_uid: ::uid_t,
                si_status: ::c_int,
                si_utime: ::c_long,
                si_stime: ::c_long,
            }
            impl ::Copy for sifields_sigchld {}
            impl ::Clone for sifields_sigchld {
                fn clone(&self) -> sifields_sigchld {
                    *self
                }
            }

            // Internal, for casts to access union fields
            #[repr(C)]
            union sifields {
                _align_pointer: *mut ::c_void,
                sigchld: sifields_sigchld,
            }

            // Internal, for casts to access union fields. Note that some variants
            // of sifields start with a pointer, which makes the alignment of
            // sifields vary on 32-bit and 64-bit architectures.
            #[repr(C)]
            struct siginfo_f {
                _siginfo_base: [::c_int; 3],
                sifields: sifields,
            }

            impl siginfo_t {
                unsafe fn sifields(&self) -> &sifields {
                    &(*(self as *const siginfo_t as *const siginfo_f)).sifields
                }

                pub unsafe fn si_pid(&self) -> ::pid_t {
                    self.sifields().sigchld.si_pid
                }

                pub unsafe fn si_uid(&self) -> ::uid_t {
                    self.sifields().sigchld.si_uid
                }

                pub unsafe fn si_status(&self) -> ::c_int {
                    self.sifields().sigchld.si_status
                }

                pub unsafe fn si_utime(&self) -> ::c_long {
                    self.sifields().sigchld.si_utime
                }

                pub unsafe fn si_stime(&self) -> ::c_long {
                    self.sifields().sigchld.si_stime
                }
            }

            pub union __c_anonymous_ptrace_syscall_info_data {
                pub entry: __c_anonymous_ptrace_syscall_info_entry,
                pub exit: __c_anonymous_ptrace_syscall_info_exit,
                pub seccomp: __c_anonymous_ptrace_syscall_info_seccomp,
            }
            impl ::Copy for __c_anonymous_ptrace_syscall_info_data {}
            impl ::Clone for __c_anonymous_ptrace_syscall_info_data {
                fn clone(&self) -> __c_anonymous_ptrace_syscall_info_data {
                    *self
                }
            }
        }
    }

    s_no_extra_traits! {
        pub struct utmpx {
            pub ut_type: ::c_short,
            pub ut_pid: ::pid_t,
            pub ut_line: [::c_char; __UT_LINESIZE],
            pub ut_id: [::c_char; 4],

            pub ut_user: [::c_char; __UT_NAMESIZE],
            pub ut_host: [::c_char; __UT_HOSTSIZE],
            pub ut_exit: __exit_status,

            #[cfg(any(target_arch = "aarch64",
                      target_arch = "s390x",
                      target_arch = "loongarch64",
                      all(target_pointer_width = "32",
                          not(target_arch = "x86_64"))))]
            pub ut_session: ::c_long,
            #[cfg(any(target_arch = "aarch64",
                      target_arch = "s390x",
                      target_arch = "loongarch64",
                      all(target_pointer_width = "32",
                          not(target_arch = "x86_64"))))]
            pub ut_tv: ::timeval,

            #[cfg(not(any(target_arch = "aarch64",
                          target_arch = "s390x",
                          target_arch = "loongarch64",
                          all(target_pointer_width = "32",
                              not(target_arch = "x86_64")))))]
            pub ut_session: i32,
            #[cfg(not(any(target_arch = "aarch64",
                          target_arch = "s390x",
                          target_arch = "loongarch64",
                          all(target_pointer_width = "32",
                              not(target_arch = "x86_64")))))]
            pub ut_tv: __timeval,

            pub ut_addr_v6: [i32; 4],
            __glibc_reserved: [::c_char; 20],
        }
    }

    cfg_if! {
        if #[cfg(feature = "extra_traits")] {
            impl PartialEq for utmpx {
                fn eq(&self, other: &utmpx) -> bool {
                    self.ut_type == other.ut_type
                        && self.ut_pid == other.ut_pid
                        && self.ut_line == other.ut_line
                        && self.ut_id == other.ut_id
                        && self.ut_user == other.ut_user
                        && self
                        .ut_host
                        .iter()
                        .zip(other.ut_host.iter())
                        .all(|(a,b)| a == b)
                        && self.ut_exit == other.ut_exit
                        && self.ut_session == other.ut_session
                        && self.ut_tv == other.ut_tv
                        && self.ut_addr_v6 == other.ut_addr_v6
                        && self.__glibc_reserved == other.__glibc_reserved
                }
            }

            impl Eq for utmpx {}

            impl ::fmt::Debug for utmpx {
                fn fmt(&self, f: &mut ::fmt::Formatter) -> ::fmt::Result {
                    f.debug_struct("utmpx")
                        .field("ut_type", &self.ut_type)
                        .field("ut_pid", &self.ut_pid)
                        .field("ut_line", &self.ut_line)
                        .field("ut_id", &self.ut_id)
                        .field("ut_user", &self.ut_user)
                    // FIXME: .field("ut_host", &self.ut_host)
                        .field("ut_exit", &self.ut_exit)
                        .field("ut_session", &self.ut_session)
                        .field("ut_tv", &self.ut_tv)
                        .field("ut_addr_v6", &self.ut_addr_v6)
                        .field("__glibc_reserved", &self.__glibc_reserved)
                        .finish()
                }
            }

            impl ::hash::Hash for utmpx {
                fn hash<H: ::hash::Hasher>(&self, state: &mut H) {
                    self.ut_type.hash(state);
                    self.ut_pid.hash(state);
                    self.ut_line.hash(state);
                    self.ut_id.hash(state);
                    self.ut_user.hash(state);
                    self.ut_host.hash(state);
                    self.ut_exit.hash(state);
                    self.ut_session.hash(state);
                    self.ut_tv.hash(state);
                    self.ut_addr_v6.hash(state);
                    self.__glibc_reserved.hash(state);
                }
            }

            #[cfg(libc_union)]
            impl PartialEq for __c_anonymous_ptrace_syscall_info_data {
                fn eq(&self, other: &__c_anonymous_ptrace_syscall_info_data) -> bool {
                    unsafe {
                    self.entry == other.entry ||
                        self.exit == other.exit ||
                        self.seccomp == other.seccomp
                    }
                }
            }

            #[cfg(libc_union)]
            impl Eq for __c_anonymous_ptrace_syscall_info_data {}

            #[cfg(libc_union)]
            impl ::fmt::Debug for __c_anonymous_ptrace_syscall_info_data {
                fn fmt(&self, f: &mut ::fmt::Formatter) -> ::fmt::Result {
                    unsafe {
                    f.debug_struct("__c_anonymous_ptrace_syscall_info_data")
                        .field("entry", &self.entry)
                        .field("exit", &self.exit)
                        .field("seccomp", &self.seccomp)
                        .finish()
                    }
                }
            }

            #[cfg(libc_union)]
            impl ::hash::Hash for __c_anonymous_ptrace_syscall_info_data {
                fn hash<H: ::hash::Hasher>(&self, state: &mut H) {
                    unsafe {
                    self.entry.hash(state);
                    self.exit.hash(state);
                    self.seccomp.hash(state);
                    }
                }
            }
        }
    }

    // include/uapi/asm-generic/hugetlb_encode.h
    pub const HUGETLB_FLAG_ENCODE_SHIFT: ::c_int = 26;
    pub const HUGETLB_FLAG_ENCODE_MASK: ::c_int = 0x3f;

    pub const HUGETLB_FLAG_ENCODE_64KB: ::c_int = 16 << HUGETLB_FLAG_ENCODE_SHIFT;
    pub const HUGETLB_FLAG_ENCODE_512KB: ::c_int = 19 << HUGETLB_FLAG_ENCODE_SHIFT;
    pub const HUGETLB_FLAG_ENCODE_1MB: ::c_int = 20 << HUGETLB_FLAG_ENCODE_SHIFT;
    pub const HUGETLB_FLAG_ENCODE_2MB: ::c_int = 21 << HUGETLB_FLAG_ENCODE_SHIFT;
    pub const HUGETLB_FLAG_ENCODE_8MB: ::c_int = 23 << HUGETLB_FLAG_ENCODE_SHIFT;
    pub const HUGETLB_FLAG_ENCODE_16MB: ::c_int = 24 << HUGETLB_FLAG_ENCODE_SHIFT;
    pub const HUGETLB_FLAG_ENCODE_32MB: ::c_int = 25 << HUGETLB_FLAG_ENCODE_SHIFT;
    pub const HUGETLB_FLAG_ENCODE_256MB: ::c_int = 28 << HUGETLB_FLAG_ENCODE_SHIFT;
    pub const HUGETLB_FLAG_ENCODE_512MB: ::c_int = 29 << HUGETLB_FLAG_ENCODE_SHIFT;
    pub const HUGETLB_FLAG_ENCODE_1GB: ::c_int = 30 << HUGETLB_FLAG_ENCODE_SHIFT;
    pub const HUGETLB_FLAG_ENCODE_2GB: ::c_int = 31 << HUGETLB_FLAG_ENCODE_SHIFT;
    pub const HUGETLB_FLAG_ENCODE_16GB: ::c_int = 34 << HUGETLB_FLAG_ENCODE_SHIFT;

    // include/uapi/linux/mman.h
    /*
     * Huge page size encoding when MAP_HUGETLB is specified, and a huge page
     * size other than the default is desired.  See hugetlb_encode.h.
     * All known huge page size encodings are provided here.  It is the
     * responsibility of the application to know which sizes are supported on
     * the running system.  See mmap(2) man page for details.
     */
    pub const MAP_HUGE_SHIFT: ::c_int = HUGETLB_FLAG_ENCODE_SHIFT;
    pub const MAP_HUGE_MASK: ::c_int = HUGETLB_FLAG_ENCODE_MASK;

    pub const MAP_HUGE_64KB: ::c_int = HUGETLB_FLAG_ENCODE_64KB;
    pub const MAP_HUGE_512KB: ::c_int = HUGETLB_FLAG_ENCODE_512KB;
    pub const MAP_HUGE_1MB: ::c_int = HUGETLB_FLAG_ENCODE_1MB;
    pub const MAP_HUGE_2MB: ::c_int = HUGETLB_FLAG_ENCODE_2MB;
    pub const MAP_HUGE_8MB: ::c_int = HUGETLB_FLAG_ENCODE_8MB;
    pub const MAP_HUGE_16MB: ::c_int = HUGETLB_FLAG_ENCODE_16MB;
    pub const MAP_HUGE_32MB: ::c_int = HUGETLB_FLAG_ENCODE_32MB;
    pub const MAP_HUGE_256MB: ::c_int = HUGETLB_FLAG_ENCODE_256MB;
    pub const MAP_HUGE_512MB: ::c_int = HUGETLB_FLAG_ENCODE_512MB;
    pub const MAP_HUGE_1GB: ::c_int = HUGETLB_FLAG_ENCODE_1GB;
    pub const MAP_HUGE_2GB: ::c_int = HUGETLB_FLAG_ENCODE_2GB;
    pub const MAP_HUGE_16GB: ::c_int = HUGETLB_FLAG_ENCODE_16GB;

    pub const PRIO_PROCESS: ::__priority_which_t = 0;
    pub const PRIO_PGRP: ::__priority_which_t = 1;
    pub const PRIO_USER: ::__priority_which_t = 2;

    pub const MS_RMT_MASK: ::c_ulong = 0x02800051;

    pub const __UT_LINESIZE: usize = 32;
    pub const __UT_NAMESIZE: usize = 32;
    pub const __UT_HOSTSIZE: usize = 256;
    pub const EMPTY: ::c_short = 0;
    pub const RUN_LVL: ::c_short = 1;
    pub const BOOT_TIME: ::c_short = 2;
    pub const NEW_TIME: ::c_short = 3;
    pub const OLD_TIME: ::c_short = 4;
    pub const INIT_PROCESS: ::c_short = 5;
    pub const LOGIN_PROCESS: ::c_short = 6;
    pub const USER_PROCESS: ::c_short = 7;
    pub const DEAD_PROCESS: ::c_short = 8;
    pub const ACCOUNTING: ::c_short = 9;

    // dlfcn.h
    pub const LM_ID_BASE: ::c_long = 0;
    pub const LM_ID_NEWLM: ::c_long = -1;

    pub const RTLD_DI_LMID: ::c_int = 1;
    pub const RTLD_DI_LINKMAP: ::c_int = 2;
    pub const RTLD_DI_CONFIGADDR: ::c_int = 3;
    pub const RTLD_DI_SERINFO: ::c_int = 4;
    pub const RTLD_DI_SERINFOSIZE: ::c_int = 5;
    pub const RTLD_DI_ORIGIN: ::c_int = 6;
    pub const RTLD_DI_PROFILENAME: ::c_int = 7;
    pub const RTLD_DI_PROFILEOUT: ::c_int = 8;
    pub const RTLD_DI_TLS_MODID: ::c_int = 9;
    pub const RTLD_DI_TLS_DATA: ::c_int = 10;

    pub const SOCK_NONBLOCK: ::c_int = O_NONBLOCK;
    pub const PIDFD_NONBLOCK: ::c_uint = O_NONBLOCK as ::c_uint;

    pub const SOL_RXRPC: ::c_int = 272;
    pub const SOL_PPPOL2TP: ::c_int = 273;
    pub const SOL_PNPIPE: ::c_int = 275;
    pub const SOL_RDS: ::c_int = 276;
    pub const SOL_IUCV: ::c_int = 277;
    pub const SOL_CAIF: ::c_int = 278;
    pub const SOL_NFC: ::c_int = 280;
    pub const SOL_XDP: ::c_int = 283;

    pub const MSG_TRYHARD: ::c_int = 4;

    pub const LC_PAPER: ::c_int = 7;
    pub const LC_NAME: ::c_int = 8;
    pub const LC_ADDRESS: ::c_int = 9;
    pub const LC_TELEPHONE: ::c_int = 10;
    pub const LC_MEASUREMENT: ::c_int = 11;
    pub const LC_IDENTIFICATION: ::c_int = 12;
    pub const LC_PAPER_MASK: ::c_int = 1 << LC_PAPER;
    pub const LC_NAME_MASK: ::c_int = 1 << LC_NAME;
    pub const LC_ADDRESS_MASK: ::c_int = 1 << LC_ADDRESS;
    pub const LC_TELEPHONE_MASK: ::c_int = 1 << LC_TELEPHONE;
    pub const LC_MEASUREMENT_MASK: ::c_int = 1 << LC_MEASUREMENT;
    pub const LC_IDENTIFICATION_MASK: ::c_int = 1 << LC_IDENTIFICATION;
    pub const LC_ALL_MASK: ::c_int = ::LC_CTYPE_MASK
        | ::LC_NUMERIC_MASK
        | ::LC_TIME_MASK
        | ::LC_COLLATE_MASK
        | ::LC_MONETARY_MASK
        | ::LC_MESSAGES_MASK
        | LC_PAPER_MASK
        | LC_NAME_MASK
        | LC_ADDRESS_MASK
        | LC_TELEPHONE_MASK
        | LC_MEASUREMENT_MASK
        | LC_IDENTIFICATION_MASK;

    pub const ENOTSUP: ::c_int = EOPNOTSUPP;

    pub const SOCK_SEQPACKET: ::c_int = 5;
    pub const SOCK_DCCP: ::c_int = 6;
    pub const SOCK_PACKET: ::c_int = 10;

    pub const FAN_MARK_INODE: ::c_uint = 0x0000_0000;
    pub const FAN_MARK_MOUNT: ::c_uint = 0x0000_0010;
    // NOTE: FAN_MARK_FILESYSTEM requires Linux Kernel >= 4.20.0
    pub const FAN_MARK_FILESYSTEM: ::c_uint = 0x0000_0100;

    pub const AF_IB: ::c_int = 27;
    pub const AF_MPLS: ::c_int = 28;
    pub const AF_NFC: ::c_int = 39;
    pub const AF_VSOCK: ::c_int = 40;
    pub const AF_XDP: ::c_int = 44;
    pub const PF_IB: ::c_int = AF_IB;
    pub const PF_MPLS: ::c_int = AF_MPLS;
    pub const PF_NFC: ::c_int = AF_NFC;
    pub const PF_VSOCK: ::c_int = AF_VSOCK;
    pub const PF_XDP: ::c_int = AF_XDP;

    /* 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 SIGEV_THREAD_ID: ::c_int = 4;

    pub const BUFSIZ: ::c_uint = 8192;
    pub const TMP_MAX: ::c_uint = 238328;
    pub const FOPEN_MAX: ::c_uint = 16;
    pub const FILENAME_MAX: ::c_uint = 4096;
    pub const POSIX_MADV_DONTNEED: ::c_int = 4;
    pub const _SC_EQUIV_CLASS_MAX: ::c_int = 41;
    pub const _SC_CHARCLASS_NAME_MAX: ::c_int = 45;
    pub const _SC_PII: ::c_int = 53;
    pub const _SC_PII_XTI: ::c_int = 54;
    pub const _SC_PII_SOCKET: ::c_int = 55;
    pub const _SC_PII_INTERNET: ::c_int = 56;
    pub const _SC_PII_OSI: ::c_int = 57;
    pub const _SC_POLL: ::c_int = 58;
    pub const _SC_SELECT: ::c_int = 59;
    pub const _SC_PII_INTERNET_STREAM: ::c_int = 61;
    pub const _SC_PII_INTERNET_DGRAM: ::c_int = 62;
    pub const _SC_PII_OSI_COTS: ::c_int = 63;
    pub const _SC_PII_OSI_CLTS: ::c_int = 64;
    pub const _SC_PII_OSI_M: ::c_int = 65;
    pub const _SC_T_IOV_MAX: ::c_int = 66;
    pub const _SC_2_C_VERSION: ::c_int = 96;
    pub const _SC_CHAR_BIT: ::c_int = 101;
    pub const _SC_CHAR_MAX: ::c_int = 102;
    pub const _SC_CHAR_MIN: ::c_int = 103;
    pub const _SC_INT_MAX: ::c_int = 104;
    pub const _SC_INT_MIN: ::c_int = 105;
    pub const _SC_LONG_BIT: ::c_int = 106;
    pub const _SC_WORD_BIT: ::c_int = 107;
    pub const _SC_MB_LEN_MAX: ::c_int = 108;
    pub const _SC_SSIZE_MAX: ::c_int = 110;
    pub const _SC_SCHAR_MAX: ::c_int = 111;
    pub const _SC_SCHAR_MIN: ::c_int = 112;
    pub const _SC_SHRT_MAX: ::c_int = 113;
    pub const _SC_SHRT_MIN: ::c_int = 114;
    pub const _SC_UCHAR_MAX: ::c_int = 115;
    pub const _SC_UINT_MAX: ::c_int = 116;
    pub const _SC_ULONG_MAX: ::c_int = 117;
    pub const _SC_USHRT_MAX: ::c_int = 118;
    pub const _SC_NL_ARGMAX: ::c_int = 119;
    pub const _SC_NL_LANGMAX: ::c_int = 120;
    pub const _SC_NL_MSGMAX: ::c_int = 121;
    pub const _SC_NL_NMAX: ::c_int = 122;
    pub const _SC_NL_SETMAX: ::c_int = 123;
    pub const _SC_NL_TEXTMAX: ::c_int = 124;
    pub const _SC_BASE: ::c_int = 134;
    pub const _SC_C_LANG_SUPPORT: ::c_int = 135;
    pub const _SC_C_LANG_SUPPORT_R: ::c_int = 136;
    pub const _SC_DEVICE_IO: ::c_int = 140;
    pub const _SC_DEVICE_SPECIFIC: ::c_int = 141;
    pub const _SC_DEVICE_SPECIFIC_R: ::c_int = 142;
    pub const _SC_FD_MGMT: ::c_int = 143;
    pub const _SC_FIFO: ::c_int = 144;
    pub const _SC_PIPE: ::c_int = 145;
    pub const _SC_FILE_ATTRIBUTES: ::c_int = 146;
    pub const _SC_FILE_LOCKING: ::c_int = 147;
    pub const _SC_FILE_SYSTEM: ::c_int = 148;
    pub const _SC_MULTI_PROCESS: ::c_int = 150;
    pub const _SC_SINGLE_PROCESS: ::c_int = 151;
    pub const _SC_NETWORKING: ::c_int = 152;
    pub const _SC_REGEX_VERSION: ::c_int = 156;
    pub const _SC_SIGNALS: ::c_int = 158;
    pub const _SC_SYSTEM_DATABASE: ::c_int = 162;
    pub const _SC_SYSTEM_DATABASE_R: ::c_int = 163;
    pub const _SC_USER_GROUPS: ::c_int = 166;
    pub const _SC_USER_GROUPS_R: ::c_int = 167;
    pub const _SC_LEVEL1_ICACHE_SIZE: ::c_int = 185;
    pub const _SC_LEVEL1_ICACHE_ASSOC: ::c_int = 186;
    pub const _SC_LEVEL1_ICACHE_LINESIZE: ::c_int = 187;
    pub const _SC_LEVEL1_DCACHE_SIZE: ::c_int = 188;
    pub const _SC_LEVEL1_DCACHE_ASSOC: ::c_int = 189;
    pub const _SC_LEVEL1_DCACHE_LINESIZE: ::c_int = 190;
    pub const _SC_LEVEL2_CACHE_SIZE: ::c_int = 191;
    pub const _SC_LEVEL2_CACHE_ASSOC: ::c_int = 192;
    pub const _SC_LEVEL2_CACHE_LINESIZE: ::c_int = 193;
    pub const _SC_LEVEL3_CACHE_SIZE: ::c_int = 194;
    pub const _SC_LEVEL3_CACHE_ASSOC: ::c_int = 195;
    pub const _SC_LEVEL3_CACHE_LINESIZE: ::c_int = 196;
    pub const _SC_LEVEL4_CACHE_SIZE: ::c_int = 197;
    pub const _SC_LEVEL4_CACHE_ASSOC: ::c_int = 198;
    pub const _SC_LEVEL4_CACHE_LINESIZE: ::c_int = 199;
    pub const O_ACCMODE: ::c_int = 3;
    pub const ST_RELATIME: ::c_ulong = 4096;
    pub const NI_MAXHOST: ::socklen_t = 1025;

    // Most `*_SUPER_MAGIC` constants are defined at the `linux_like` level; the
    // following are only available on newer Linux versions than the versions
    // currently used in CI in some configurations, so we define them here.
    cfg_if! {
        if #[cfg(not(target_arch = "s390x"))] {
            pub const BINDERFS_SUPER_MAGIC: ::c_long = 0x6c6f6f70;
            pub const XFS_SUPER_MAGIC: ::c_long = 0x58465342;
        } else if #[cfg(target_arch = "s390x")] {
            pub const BINDERFS_SUPER_MAGIC: ::c_uint = 0x6c6f6f70;
            pub const XFS_SUPER_MAGIC: ::c_uint = 0x58465342;
        }
    }

    pub const CPU_SETSIZE: ::c_int = 0x400;

    pub const PTRACE_TRACEME: ::c_uint = 0;
    pub const PTRACE_PEEKTEXT: ::c_uint = 1;
    pub const PTRACE_PEEKDATA: ::c_uint = 2;
    pub const PTRACE_PEEKUSER: ::c_uint = 3;
    pub const PTRACE_POKETEXT: ::c_uint = 4;
    pub const PTRACE_POKEDATA: ::c_uint = 5;
    pub const PTRACE_POKEUSER: ::c_uint = 6;
    pub const PTRACE_CONT: ::c_uint = 7;
    pub const PTRACE_KILL: ::c_uint = 8;
    pub const PTRACE_SINGLESTEP: ::c_uint = 9;
    pub const PTRACE_ATTACH: ::c_uint = 16;
    pub const PTRACE_SYSCALL: ::c_uint = 24;
    pub const PTRACE_SETOPTIONS: ::c_uint = 0x4200;
    pub const PTRACE_GETEVENTMSG: ::c_uint = 0x4201;
    pub const PTRACE_GETSIGINFO: ::c_uint = 0x4202;
    pub const PTRACE_SETSIGINFO: ::c_uint = 0x4203;
    pub const PTRACE_GETREGSET: ::c_uint = 0x4204;
    pub const PTRACE_SETREGSET: ::c_uint = 0x4205;
    pub const PTRACE_SEIZE: ::c_uint = 0x4206;
    pub const PTRACE_INTERRUPT: ::c_uint = 0x4207;
    pub const PTRACE_LISTEN: ::c_uint = 0x4208;
    pub const PTRACE_PEEKSIGINFO: ::c_uint = 0x4209;
    pub const PTRACE_GET_SYSCALL_INFO: ::c_uint = 0x420e;

    // 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;

    // linux/rtnetlink.h
    pub const TCA_PAD: ::c_ushort = 9;
    pub const TCA_DUMP_INVISIBLE: ::c_ushort = 10;
    pub const TCA_CHAIN: ::c_ushort = 11;
    pub const TCA_HW_OFFLOAD: ::c_ushort = 12;

    pub const RTM_DELNETCONF: u16 = 81;
    pub const RTM_NEWSTATS: u16 = 92;
    pub const RTM_GETSTATS: u16 = 94;
    pub const RTM_NEWCACHEREPORT: u16 = 96;

    pub const RTM_F_LOOKUP_TABLE: ::c_uint = 0x1000;
    pub const RTM_F_FIB_MATCH: ::c_uint = 0x2000;

    pub const RTA_VIA: ::c_ushort = 18;
    pub const RTA_NEWDST: ::c_ushort = 19;
    pub const RTA_PREF: ::c_ushort = 20;
    pub const RTA_ENCAP_TYPE: ::c_ushort = 21;
    pub const RTA_ENCAP: ::c_ushort = 22;
    pub const RTA_EXPIRES: ::c_ushort = 23;
    pub const RTA_PAD: ::c_ushort = 24;
    pub const RTA_UID: ::c_ushort = 25;
    pub const RTA_TTL_PROPAGATE: ::c_ushort = 26;

    // linux/neighbor.h
    pub const NTF_EXT_LEARNED: u8 = 0x10;
    pub const NTF_OFFLOADED: u8 = 0x20;

    pub const NDA_MASTER: ::c_ushort = 9;
    pub const NDA_LINK_NETNSID: ::c_ushort = 10;
    pub const NDA_SRC_VNI: ::c_ushort = 11;

    // linux/personality.h
    pub const UNAME26: ::c_int = 0x0020000;
    pub const FDPIC_FUNCPTRS: ::c_int = 0x0080000;

    // linux/if_addr.h
    pub const IFA_FLAGS: ::c_ushort = 8;

    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;

    pub const MAX_LINKS: ::c_int = 32;

    pub const GENL_UNS_ADMIN_PERM: ::c_int = 0x10;

    pub const GENL_ID_VFS_DQUOT: ::c_int = ::NLMSG_MIN_TYPE + 1;
    pub const GENL_ID_PMCRAID: ::c_int = ::NLMSG_MIN_TYPE + 2;

    // 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;

    // linux/keyctl.h
    pub const KEYCTL_DH_COMPUTE: u32 = 23;
    pub const KEYCTL_PKEY_QUERY: u32 = 24;
    pub const KEYCTL_PKEY_ENCRYPT: u32 = 25;
    pub const KEYCTL_PKEY_DECRYPT: u32 = 26;
    pub const KEYCTL_PKEY_SIGN: u32 = 27;
    pub const KEYCTL_PKEY_VERIFY: u32 = 28;
    pub const KEYCTL_RESTRICT_KEYRING: u32 = 29;

    pub const KEYCTL_SUPPORTS_ENCRYPT: u32 = 0x01;
    pub const KEYCTL_SUPPORTS_DECRYPT: u32 = 0x02;
    pub const KEYCTL_SUPPORTS_SIGN: u32 = 0x04;
    pub const KEYCTL_SUPPORTS_VERIFY: u32 = 0x08;
    cfg_if! {
        if #[cfg(not(any(target_arch="mips", target_arch="mips64")))] {
            pub const KEYCTL_MOVE: u32 = 30;
            pub const KEYCTL_CAPABILITIES: u32 = 31;

            pub const KEYCTL_CAPS0_CAPABILITIES: u32 = 0x01;
            pub const KEYCTL_CAPS0_PERSISTENT_KEYRINGS: u32 = 0x02;
            pub const KEYCTL_CAPS0_DIFFIE_HELLMAN: u32 = 0x04;
            pub const KEYCTL_CAPS0_PUBLIC_KEY: u32 = 0x08;
            pub const KEYCTL_CAPS0_BIG_KEY: u32 = 0x10;
            pub const KEYCTL_CAPS0_INVALIDATE: u32 = 0x20;
            pub const KEYCTL_CAPS0_RESTRICT_KEYRING: u32 = 0x40;
            pub const KEYCTL_CAPS0_MOVE: u32 = 0x80;
            pub const KEYCTL_CAPS1_NS_KEYRING_NAME: u32 = 0x01;
            pub const KEYCTL_CAPS1_NS_KEY_TAG: u32 = 0x02;
        }
    }

    pub const M_MXFAST: ::c_int = 1;
    pub const M_NLBLKS: ::c_int = 2;
    pub const M_GRAIN: ::c_int = 3;
    pub const M_KEEP: ::c_int = 4;
    pub const M_TRIM_THRESHOLD: ::c_int = -1;
    pub const M_TOP_PAD: ::c_int = -2;
    pub const M_MMAP_THRESHOLD: ::c_int = -3;
    pub const M_MMAP_MAX: ::c_int = -4;
    pub const M_CHECK_ACTION: ::c_int = -5;
    pub const M_PERTURB: ::c_int = -6;
    pub const M_ARENA_TEST: ::c_int = -7;
    pub const M_ARENA_MAX: ::c_int = -8;

    pub const AT_STATX_SYNC_TYPE: ::c_int = 0x6000;
    pub const AT_STATX_SYNC_AS_STAT: ::c_int = 0x0000;
    pub const AT_STATX_FORCE_SYNC: ::c_int = 0x2000;
    pub const AT_STATX_DONT_SYNC: ::c_int = 0x4000;
    pub const STATX_TYPE: ::c_uint = 0x0001;
    pub const STATX_MODE: ::c_uint = 0x0002;
    pub const STATX_NLINK: ::c_uint = 0x0004;
    pub const STATX_UID: ::c_uint = 0x0008;
    pub const STATX_GID: ::c_uint = 0x0010;
    pub const STATX_ATIME: ::c_uint = 0x0020;
    pub const STATX_MTIME: ::c_uint = 0x0040;
    pub const STATX_CTIME: ::c_uint = 0x0080;
    pub const STATX_INO: ::c_uint = 0x0100;
    pub const STATX_SIZE: ::c_uint = 0x0200;
    pub const STATX_BLOCKS: ::c_uint = 0x0400;
    pub const STATX_BASIC_STATS: ::c_uint = 0x07ff;
    pub const STATX_BTIME: ::c_uint = 0x0800;
    pub const STATX_MNT_ID: ::c_uint = 0x1000;
    pub const STATX_ALL: ::c_uint = 0x0fff;
    pub const STATX__RESERVED: ::c_int = 0x80000000;
    pub const STATX_ATTR_COMPRESSED: ::c_int = 0x0004;
    pub const STATX_ATTR_IMMUTABLE: ::c_int = 0x0010;
    pub const STATX_ATTR_APPEND: ::c_int = 0x0020;
    pub const STATX_ATTR_NODUMP: ::c_int = 0x0040;
    pub const STATX_ATTR_ENCRYPTED: ::c_int = 0x0800;
    pub const STATX_ATTR_AUTOMOUNT: ::c_int = 0x1000;

    pub const SOMAXCONN: ::c_int = 4096;

    //sys/timex.h
    pub const ADJ_OFFSET: ::c_uint = 0x0001;
    pub const ADJ_FREQUENCY: ::c_uint = 0x0002;
    pub const ADJ_MAXERROR: ::c_uint = 0x0004;
    pub const ADJ_ESTERROR: ::c_uint = 0x0008;
    pub const ADJ_STATUS: ::c_uint = 0x0010;
    pub const ADJ_TIMECONST: ::c_uint = 0x0020;
    pub const ADJ_TAI: ::c_uint = 0x0080;
    pub const ADJ_SETOFFSET: ::c_uint = 0x0100;
    pub const ADJ_MICRO: ::c_uint = 0x1000;
    pub const ADJ_NANO: ::c_uint = 0x2000;
    pub const ADJ_TICK: ::c_uint = 0x4000;
    pub const ADJ_OFFSET_SINGLESHOT: ::c_uint = 0x8001;
    pub const ADJ_OFFSET_SS_READ: ::c_uint = 0xa001;
    pub const MOD_OFFSET: ::c_uint = ADJ_OFFSET;
    pub const MOD_FREQUENCY: ::c_uint = ADJ_FREQUENCY;
    pub const MOD_MAXERROR: ::c_uint = ADJ_MAXERROR;
    pub const MOD_ESTERROR: ::c_uint = ADJ_ESTERROR;
    pub const MOD_STATUS: ::c_uint = ADJ_STATUS;
    pub const MOD_TIMECONST: ::c_uint = ADJ_TIMECONST;
    pub const MOD_CLKB: ::c_uint = ADJ_TICK;
    pub const MOD_CLKA: ::c_uint = ADJ_OFFSET_SINGLESHOT;
    pub const MOD_TAI: ::c_uint = ADJ_TAI;
    pub const MOD_MICRO: ::c_uint = ADJ_MICRO;
    pub const MOD_NANO: ::c_uint = ADJ_NANO;
    pub const STA_PLL: ::c_int = 0x0001;
    pub const STA_PPSFREQ: ::c_int = 0x0002;
    pub const STA_PPSTIME: ::c_int = 0x0004;
    pub const STA_FLL: ::c_int = 0x0008;
    pub const STA_INS: ::c_int = 0x0010;
    pub const STA_DEL: ::c_int = 0x0020;
    pub const STA_UNSYNC: ::c_int = 0x0040;
    pub const STA_FREQHOLD: ::c_int = 0x0080;
    pub const STA_PPSSIGNAL: ::c_int = 0x0100;
    pub const STA_PPSJITTER: ::c_int = 0x0200;
    pub const STA_PPSWANDER: ::c_int = 0x0400;
    pub const STA_PPSERROR: ::c_int = 0x0800;
    pub const STA_CLOCKERR: ::c_int = 0x1000;
    pub const STA_NANO: ::c_int = 0x2000;
    pub const STA_MODE: ::c_int = 0x4000;
    pub const STA_CLK: ::c_int = 0x8000;
    pub const STA_RONLY: ::c_int = STA_PPSSIGNAL
        | STA_PPSJITTER
        | STA_PPSWANDER
        | STA_PPSERROR
        | STA_CLOCKERR
        | STA_NANO
        | STA_MODE
        | STA_CLK;
    pub const NTP_API: ::c_int = 4;
    pub const TIME_OK: ::c_int = 0;
    pub const TIME_INS: ::c_int = 1;
    pub const TIME_DEL: ::c_int = 2;
    pub const TIME_OOP: ::c_int = 3;
    pub const TIME_WAIT: ::c_int = 4;
    pub const TIME_ERROR: ::c_int = 5;
    pub const TIME_BAD: ::c_int = TIME_ERROR;
    pub const MAXTC: ::c_long = 6;

    cfg_if! {
        if #[cfg(any(
            target_arch = "arm",
            target_arch = "x86",
            target_arch = "x86_64",
            target_arch = "s390x",
            target_arch = "riscv64",
            target_arch = "riscv32"
        ))] {
            pub const PTHREAD_STACK_MIN: ::size_t = 16384;
        } else if #[cfg(any(
                   target_arch = "sparc",
                   target_arch = "sparc64"
               ))] {
            pub const PTHREAD_STACK_MIN: ::size_t = 0x6000;
        } else {
            pub const PTHREAD_STACK_MIN: ::size_t = 131072;
        }
    }
    pub const PTHREAD_MUTEX_ADAPTIVE_NP: ::c_int = 3;

    pub const REG_STARTEND: ::c_int = 4;

    pub const REG_EEND: ::c_int = 14;
    pub const REG_ESIZE: ::c_int = 15;
    pub const REG_ERPAREN: ::c_int = 16;

    extern "C" {
        pub fn fgetspent_r(
            fp: *mut ::FILE,
            spbuf: *mut ::spwd,
            buf: *mut ::c_char,
            buflen: ::size_t,
            spbufp: *mut *mut ::spwd,
        ) -> ::c_int;
        pub fn sgetspent_r(
            s: *const ::c_char,
            spbuf: *mut ::spwd,
            buf: *mut ::c_char,
            buflen: ::size_t,
            spbufp: *mut *mut ::spwd,
        ) -> ::c_int;
        pub fn getspent_r(
            spbuf: *mut ::spwd,
            buf: *mut ::c_char,
            buflen: ::size_t,
            spbufp: *mut *mut ::spwd,
        ) -> ::c_int;
        pub fn qsort_r(
            base: *mut ::c_void,
            num: ::size_t,
            size: ::size_t,
            compar: ::Option<
                unsafe extern "C" fn(*const ::c_void, *const ::c_void, *mut ::c_void) -> ::c_int,
            >,
            arg: *mut ::c_void,
        );
        pub fn sendmmsg(
            sockfd: ::c_int,
            msgvec: *mut ::mmsghdr,
            vlen: ::c_uint,
            flags: ::c_int,
        ) -> ::c_int;
        pub fn recvmmsg(
            sockfd: ::c_int,
            msgvec: *mut ::mmsghdr,
            vlen: ::c_uint,
            flags: ::c_int,
            timeout: *mut ::timespec,
        ) -> ::c_int;

        pub fn getrlimit64(resource: ::__rlimit_resource_t, rlim: *mut ::rlimit64) -> ::c_int;
        pub fn setrlimit64(resource: ::__rlimit_resource_t, rlim: *const ::rlimit64) -> ::c_int;
        pub fn getrlimit(resource: ::__rlimit_resource_t, rlim: *mut ::rlimit) -> ::c_int;
        pub fn setrlimit(resource: ::__rlimit_resource_t, rlim: *const ::rlimit) -> ::c_int;
        pub fn prlimit(
            pid: ::pid_t,
            resource: ::__rlimit_resource_t,
            new_limit: *const ::rlimit,
            old_limit: *mut ::rlimit,
        ) -> ::c_int;
        pub fn prlimit64(
            pid: ::pid_t,
            resource: ::__rlimit_resource_t,
            new_limit: *const ::rlimit64,
            old_limit: *mut ::rlimit64,
        ) -> ::c_int;
        pub fn utmpname(file: *const ::c_char) -> ::c_int;
        pub fn utmpxname(file: *const ::c_char) -> ::c_int;
        pub fn getutxent() -> *mut utmpx;
        pub fn getutxid(ut: *const utmpx) -> *mut utmpx;
        pub fn getutxline(ut: *const utmpx) -> *mut utmpx;
        pub fn pututxline(ut: *const utmpx) -> *mut utmpx;
        pub fn setutxent();
        pub fn endutxent();
        pub fn getpt() -> ::c_int;
        pub fn mallopt(param: ::c_int, value: ::c_int) -> ::c_int;
        pub fn gettimeofday(tp: *mut ::timeval, tz: *mut ::timezone) -> ::c_int;
        pub fn statx(
            dirfd: ::c_int,
            pathname: *const c_char,
            flags: ::c_int,
            mask: ::c_uint,
            statxbuf: *mut statx,
        ) -> ::c_int;
        pub fn getentropy(buf: *mut ::c_void, buflen: ::size_t) -> ::c_int;
        pub fn getrandom(buf: *mut ::c_void, buflen: ::size_t, flags: ::c_uint) -> ::ssize_t;
        pub fn getauxval(type_: ::c_ulong) -> ::c_ulong;

        pub fn adjtimex(buf: *mut timex) -> ::c_int;
        pub fn ntp_adjtime(buf: *mut timex) -> ::c_int;
        #[link_name = "ntp_gettimex"]
        pub fn ntp_gettime(buf: *mut ntptimeval) -> ::c_int;
        pub fn clock_adjtime(clk_id: ::clockid_t, buf: *mut ::timex) -> ::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 fanotify_mark(
            fd: ::c_int,
            flags: ::c_uint,
            mask: u64,
            dirfd: ::c_int,
            path: *const ::c_char,
        ) -> ::c_int;
        pub fn preadv2(
            fd: ::c_int,
            iov: *const ::iovec,
            iovcnt: ::c_int,
            offset: ::off_t,
            flags: ::c_int,
        ) -> ::ssize_t;
        pub fn pwritev2(
            fd: ::c_int,
            iov: *const ::iovec,
            iovcnt: ::c_int,
            offset: ::off_t,
            flags: ::c_int,
        ) -> ::ssize_t;
        pub fn preadv64v2(
            fd: ::c_int,
            iov: *const ::iovec,
            iovcnt: ::c_int,
            offset: ::off64_t,
            flags: ::c_int,
        ) -> ::ssize_t;
        pub fn pwritev64v2(
            fd: ::c_int,
            iov: *const ::iovec,
            iovcnt: ::c_int,
            offset: ::off64_t,
            flags: ::c_int,
        ) -> ::ssize_t;
        pub fn renameat2(
            olddirfd: ::c_int,
            oldpath: *const ::c_char,
            newdirfd: ::c_int,
            newpath: *const ::c_char,
            flags: ::c_uint,
        ) -> ::c_int;

        // Added in `glibc` 2.25
        pub fn explicit_bzero(s: *mut ::c_void, len: ::size_t);
        // Added in `glibc` 2.29
        pub fn reallocarray(ptr: *mut ::c_void, nmemb: ::size_t, size: ::size_t) -> *mut ::c_void;

        pub fn ctermid(s: *mut ::c_char) -> *mut ::c_char;
    }

    extern "C" {
        pub fn ioctl(fd: ::c_int, request: ::c_ulong, ...) -> ::c_int;
        pub fn backtrace(buf: *mut *mut ::c_void, sz: ::c_int) -> ::c_int;
        pub fn glob64(
            pattern: *const ::c_char,
            flags: ::c_int,
            errfunc: ::Option<extern "C" fn(epath: *const ::c_char, errno: ::c_int) -> ::c_int>,
            pglob: *mut glob64_t,
        ) -> ::c_int;
        pub fn globfree64(pglob: *mut glob64_t);
        pub fn ptrace(request: ::c_uint, ...) -> ::c_long;
        pub fn pthread_attr_getaffinity_np(
            attr: *const ::pthread_attr_t,
            cpusetsize: ::size_t,
            cpuset: *mut ::cpu_set_t,
        ) -> ::c_int;
        pub fn pthread_attr_setaffinity_np(
            attr: *mut ::pthread_attr_t,
            cpusetsize: ::size_t,
            cpuset: *const ::cpu_set_t,
        ) -> ::c_int;
        pub fn getpriority(which: ::__priority_which_t, who: ::id_t) -> ::c_int;
        pub fn setpriority(which: ::__priority_which_t, who: ::id_t, prio: ::c_int) -> ::c_int;
        pub fn pthread_rwlockattr_getkind_np(
            attr: *const ::pthread_rwlockattr_t,
            val: *mut ::c_int,
        ) -> ::c_int;
        pub fn pthread_rwlockattr_setkind_np(
            attr: *mut ::pthread_rwlockattr_t,
            val: ::c_int,
        ) -> ::c_int;
        pub fn mallinfo() -> ::mallinfo;
        pub fn mallinfo2() -> ::mallinfo2;
        pub fn malloc_info(options: ::c_int, stream: *mut ::FILE) -> ::c_int;
        pub fn malloc_usable_size(ptr: *mut ::c_void) -> ::size_t;
        pub fn getpwent_r(
            pwd: *mut ::passwd,
            buf: *mut ::c_char,
            buflen: ::size_t,
            result: *mut *mut ::passwd,
        ) -> ::c_int;
        pub fn getgrent_r(
            grp: *mut ::group,
            buf: *mut ::c_char,
            buflen: ::size_t,
            result: *mut *mut ::group,
        ) -> ::c_int;

        pub fn sethostid(hostid: ::c_long) -> ::c_int;

        pub fn memfd_create(name: *const ::c_char, flags: ::c_uint) -> ::c_int;
        pub fn mlock2(addr: *const ::c_void, len: ::size_t, flags: ::c_uint) -> ::c_int;
    }

    extern "C" {
        pub fn dlmopen(lmid: Lmid_t, filename: *const ::c_char, flag: ::c_int) -> *mut ::c_void;
        pub fn dlinfo(handle: *mut ::c_void, request: ::c_int, info: *mut ::c_void) -> ::c_int;
        pub fn dladdr1(
            addr: *const ::c_void,
            info: *mut ::Dl_info,
            extra_info: *mut *mut ::c_void,
            flags: ::c_int,
        ) -> ::c_int;
        pub fn malloc_trim(__pad: ::size_t) -> ::c_int;
    }

    extern "C" {
        pub fn gnu_get_libc_release() -> *const ::c_char;
        pub fn gnu_get_libc_version() -> *const ::c_char;
    }

    cfg_if! {
        if #[cfg(any(target_arch = "x86",
                     target_arch = "arm",
                     target_arch = "m68k",
                     target_arch = "mips",
                     target_arch = "powerpc",
                     target_arch = "sparc",
                     target_arch = "riscv32"))] {
            mod b32;
            pub use self::b32::*;
        } else if #[cfg(any(target_arch = "x86_64",
                            target_arch = "aarch64",
                            target_arch = "powerpc64",
                            target_arch = "mips64",
                            target_arch = "s390x",
                            target_arch = "sparc64",
                            target_arch = "riscv64",
                            target_arch = "loongarch64"))] {
            mod b64;
            pub use self::b64::*;
        } else {
            // Unknown target_arch
        }
    }

    cfg_if! {
        if #[cfg(libc_align)] {
            mod align;
            pub use self::align::*;
        } else {
            mod no_align;
            pub use self::no_align::*;
        }
    }