pub type time_t = i64;
pub type mode_t = u32;
pub type nlink_t = u32;
pub type ino_t = u64;
pub type pthread_key_t = ::c_int;
pub type rlim_t = u64;
pub type speed_t = ::c_uint;
pub type tcflag_t = ::c_uint;
pub type nl_item = c_long;
pub type clockid_t = ::c_int;
pub type id_t = u32;
pub type sem_t = *mut sem;
pub type key_t = c_long;

#[cfg_attr(feature = "extra_traits", derive(Debug))]
pub enum timezone {}
impl ::Copy for timezone {}
impl ::Clone for timezone {
    fn clone(&self) -> timezone {
        *self
    }
}
#[cfg_attr(feature = "extra_traits", derive(Debug))]
pub enum sem {}
impl ::Copy for sem {}
impl ::Clone for sem {
    fn clone(&self) -> sem {
        *self
    }
}

s! {
    pub struct sigaction {
        pub sa_sigaction: ::sighandler_t,
        pub sa_mask: ::sigset_t,
        pub sa_flags: ::c_int,
    }

    pub struct stack_t {
        pub ss_sp: *mut ::c_void,
        pub ss_size: ::size_t,
        pub ss_flags: ::c_int,
    }

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

    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_cc: [::cc_t; ::NCCS],
        pub c_ispeed: ::c_int,
        pub c_ospeed: ::c_int,
    }

    pub struct flock {
        pub l_start: ::off_t,
        pub l_len: ::off_t,
        pub l_pid: ::pid_t,
        pub l_type: ::c_short,
        pub l_whence: ::c_short,
    }

    pub struct ipc_perm {
        pub cuid: ::uid_t,
        pub cgid: ::gid_t,
        pub uid: ::uid_t,
        pub gid: ::gid_t,
        pub mode: ::mode_t,
        pub seq: ::c_ushort,
        pub key: ::key_t,
    }
}

pub const D_T_FMT: ::nl_item = 0;
pub const D_FMT: ::nl_item = 1;
pub const T_FMT: ::nl_item = 2;
pub const T_FMT_AMPM: ::nl_item = 3;
pub const AM_STR: ::nl_item = 4;
pub const PM_STR: ::nl_item = 5;

pub const DAY_1: ::nl_item = 6;
pub const DAY_2: ::nl_item = 7;
pub const DAY_3: ::nl_item = 8;
pub const DAY_4: ::nl_item = 9;
pub const DAY_5: ::nl_item = 10;
pub const DAY_6: ::nl_item = 11;
pub const DAY_7: ::nl_item = 12;

pub const ABDAY_1: ::nl_item = 13;
pub const ABDAY_2: ::nl_item = 14;
pub const ABDAY_3: ::nl_item = 15;
pub const ABDAY_4: ::nl_item = 16;
pub const ABDAY_5: ::nl_item = 17;
pub const ABDAY_6: ::nl_item = 18;
pub const ABDAY_7: ::nl_item = 19;

pub const MON_1: ::nl_item = 20;
pub const MON_2: ::nl_item = 21;
pub const MON_3: ::nl_item = 22;
pub const MON_4: ::nl_item = 23;
pub const MON_5: ::nl_item = 24;
pub const MON_6: ::nl_item = 25;
pub const MON_7: ::nl_item = 26;
pub const MON_8: ::nl_item = 27;
pub const MON_9: ::nl_item = 28;
pub const MON_10: ::nl_item = 29;
pub const MON_11: ::nl_item = 30;
pub const MON_12: ::nl_item = 31;

pub const ABMON_1: ::nl_item = 32;
pub const ABMON_2: ::nl_item = 33;
pub const ABMON_3: ::nl_item = 34;
pub const ABMON_4: ::nl_item = 35;
pub const ABMON_5: ::nl_item = 36;
pub const ABMON_6: ::nl_item = 37;
pub const ABMON_7: ::nl_item = 38;
pub const ABMON_8: ::nl_item = 39;
pub const ABMON_9: ::nl_item = 40;
pub const ABMON_10: ::nl_item = 41;
pub const ABMON_11: ::nl_item = 42;
pub const ABMON_12: ::nl_item = 43;

pub const RADIXCHAR: ::nl_item = 44;
pub const THOUSEP: ::nl_item = 45;
pub const YESSTR: ::nl_item = 46;
pub const YESEXPR: ::nl_item = 47;
pub const NOSTR: ::nl_item = 48;
pub const NOEXPR: ::nl_item = 49;
pub const CRNCYSTR: ::nl_item = 50;

pub const CODESET: ::nl_item = 51;

pub const EXIT_FAILURE: ::c_int = 1;
pub const EXIT_SUCCESS: ::c_int = 0;
pub const RAND_MAX: ::c_int = 2147483647;
pub const EOF: ::c_int = -1;
pub const SEEK_SET: ::c_int = 0;
pub const SEEK_CUR: ::c_int = 1;
pub const SEEK_END: ::c_int = 2;
pub const _IOFBF: ::c_int = 0;
pub const _IONBF: ::c_int = 2;
pub const _IOLBF: ::c_int = 1;
pub const BUFSIZ: ::c_uint = 1024;
pub const FOPEN_MAX: ::c_uint = 20;
pub const FILENAME_MAX: ::c_uint = 1024;
pub const L_tmpnam: ::c_uint = 1024;
pub const O_NOCTTY: ::c_int = 32768;
pub const S_IFIFO: mode_t = 4096;
pub const S_IFCHR: mode_t = 8192;
pub const S_IFBLK: mode_t = 24576;
pub const S_IFDIR: mode_t = 16384;
pub const S_IFREG: mode_t = 32768;
pub const S_IFLNK: mode_t = 40960;
pub const S_IFSOCK: mode_t = 49152;
pub const S_IFMT: mode_t = 61440;
pub const S_IEXEC: mode_t = 64;
pub const S_IWRITE: mode_t = 128;
pub const S_IREAD: mode_t = 256;
pub const S_IRWXU: mode_t = 448;
pub const S_IXUSR: mode_t = 64;
pub const S_IWUSR: mode_t = 128;
pub const S_IRUSR: mode_t = 256;
pub const S_IRWXG: mode_t = 56;
pub const S_IXGRP: mode_t = 8;
pub const S_IWGRP: mode_t = 16;
pub const S_IRGRP: mode_t = 32;
pub const S_IRWXO: mode_t = 7;
pub const S_IXOTH: mode_t = 1;
pub const S_IWOTH: mode_t = 2;
pub const S_IROTH: mode_t = 4;
pub const F_OK: ::c_int = 0;
pub const R_OK: ::c_int = 4;
pub const W_OK: ::c_int = 2;
pub const X_OK: ::c_int = 1;
pub const STDIN_FILENO: ::c_int = 0;
pub const STDOUT_FILENO: ::c_int = 1;
pub const STDERR_FILENO: ::c_int = 2;
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_GETLK: ::c_int = 7;
pub const F_SETLK: ::c_int = 8;
pub const F_SETLKW: ::c_int = 9;
pub const SIGHUP: ::c_int = 1;
pub const SIGINT: ::c_int = 2;
pub const SIGQUIT: ::c_int = 3;
pub const SIGILL: ::c_int = 4;
pub const SIGABRT: ::c_int = 6;
pub const SIGEMT: ::c_int = 7;
pub const SIGFPE: ::c_int = 8;
pub const SIGKILL: ::c_int = 9;
pub const SIGSEGV: ::c_int = 11;
pub const SIGPIPE: ::c_int = 13;
pub const SIGALRM: ::c_int = 14;
pub const SIGTERM: ::c_int = 15;

pub const PROT_NONE: ::c_int = 0;
pub const PROT_READ: ::c_int = 1;
pub const PROT_WRITE: ::c_int = 2;
pub const PROT_EXEC: ::c_int = 4;

pub const MAP_FILE: ::c_int = 0x0000;
pub const MAP_SHARED: ::c_int = 0x0001;
pub const MAP_PRIVATE: ::c_int = 0x0002;
pub const MAP_FIXED: ::c_int = 0x0010;
pub const MAP_ANON: ::c_int = 0x1000;
pub const MAP_ANONYMOUS: ::c_int = MAP_ANON;

pub const MAP_FAILED: *mut ::c_void = !0 as *mut ::c_void;

pub const IPC_CREAT: ::c_int = 0o001000;
pub const IPC_EXCL: ::c_int = 0o002000;
pub const IPC_NOWAIT: ::c_int = 0o004000;

pub const IPC_PRIVATE: ::key_t = 0;

pub const IPC_RMID: ::c_int = 0;
pub const IPC_SET: ::c_int = 1;
pub const IPC_STAT: ::c_int = 2;

pub const MCL_CURRENT: ::c_int = 0x0001;
pub const MCL_FUTURE: ::c_int = 0x0002;

pub const MS_ASYNC: ::c_int = 0x0001;

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 EDEADLK: ::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 EAGAIN: ::c_int = 35;
pub const EWOULDBLOCK: ::c_int = 35;
pub const EINPROGRESS: ::c_int = 36;
pub const EALREADY: ::c_int = 37;
pub const ENOTSOCK: ::c_int = 38;
pub const EDESTADDRREQ: ::c_int = 39;
pub const EMSGSIZE: ::c_int = 40;
pub const EPROTOTYPE: ::c_int = 41;
pub const ENOPROTOOPT: ::c_int = 42;
pub const EPROTONOSUPPORT: ::c_int = 43;
pub const ESOCKTNOSUPPORT: ::c_int = 44;
pub const EOPNOTSUPP: ::c_int = 45;
pub const EPFNOSUPPORT: ::c_int = 46;
pub const EAFNOSUPPORT: ::c_int = 47;
pub const EADDRINUSE: ::c_int = 48;
pub const EADDRNOTAVAIL: ::c_int = 49;
pub const ENETDOWN: ::c_int = 50;
pub const ENETUNREACH: ::c_int = 51;
pub const ENETRESET: ::c_int = 52;
pub const ECONNABORTED: ::c_int = 53;
pub const ECONNRESET: ::c_int = 54;
pub const ENOBUFS: ::c_int = 55;
pub const EISCONN: ::c_int = 56;
pub const ENOTCONN: ::c_int = 57;
pub const ESHUTDOWN: ::c_int = 58;
pub const ETOOMANYREFS: ::c_int = 59;
pub const ETIMEDOUT: ::c_int = 60;
pub const ECONNREFUSED: ::c_int = 61;
pub const ELOOP: ::c_int = 62;
pub const ENAMETOOLONG: ::c_int = 63;
pub const EHOSTDOWN: ::c_int = 64;
pub const EHOSTUNREACH: ::c_int = 65;
pub const ENOTEMPTY: ::c_int = 66;
pub const EPROCLIM: ::c_int = 67;
pub const EUSERS: ::c_int = 68;
pub const EDQUOT: ::c_int = 69;
pub const ESTALE: ::c_int = 70;
pub const EREMOTE: ::c_int = 71;
pub const EBADRPC: ::c_int = 72;
pub const ERPCMISMATCH: ::c_int = 73;
pub const EPROGUNAVAIL: ::c_int = 74;
pub const EPROGMISMATCH: ::c_int = 75;
pub const EPROCUNAVAIL: ::c_int = 76;
pub const ENOLCK: ::c_int = 77;
pub const ENOSYS: ::c_int = 78;
pub const EFTYPE: ::c_int = 79;
pub const EAUTH: ::c_int = 80;
pub const ENEEDAUTH: ::c_int = 81;

pub const F_DUPFD: ::c_int = 0;
pub const F_GETFD: ::c_int = 1;
pub const F_SETFD: ::c_int = 2;
pub const F_GETFL: ::c_int = 3;
pub const F_SETFL: ::c_int = 4;

pub const SIGTRAP: ::c_int = 5;

pub const GLOB_APPEND: ::c_int = 0x0001;
pub const GLOB_DOOFFS: ::c_int = 0x0002;
pub const GLOB_ERR: ::c_int = 0x0004;
pub const GLOB_MARK: ::c_int = 0x0008;
pub const GLOB_NOCHECK: ::c_int = 0x0010;
pub const GLOB_NOSORT: ::c_int = 0x0020;
pub const GLOB_NOESCAPE: ::c_int = 0x1000;

pub const GLOB_NOSPACE: ::c_int = -1;
pub const GLOB_ABORTED: ::c_int = -2;
pub const GLOB_NOMATCH: ::c_int = -3;
pub const GLOB_NOSYS: ::c_int = -4;

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_MADV_DONTNEED: ::c_int = 4;

pub const PTHREAD_CREATE_JOINABLE: ::c_int = 0;
pub const PTHREAD_CREATE_DETACHED: ::c_int = 1;

pub const PT_TRACE_ME: ::c_int = 0;
pub const PT_READ_I: ::c_int = 1;
pub const PT_READ_D: ::c_int = 2;
pub const PT_WRITE_I: ::c_int = 4;
pub const PT_WRITE_D: ::c_int = 5;
pub const PT_CONTINUE: ::c_int = 7;
pub const PT_KILL: ::c_int = 8;
pub const PT_ATTACH: ::c_int = 9;
pub const PT_DETACH: ::c_int = 10;
pub const PT_IO: ::c_int = 11;

// http://man.openbsd.org/OpenBSD-current/man2/clock_getres.2
// The man page says clock_gettime(3) can accept various values as clockid_t but
// http://fxr.watson.org/fxr/source/kern/kern_time.c?v=OPENBSD;im=excerpts#L161
// the implementation rejects anything other than the below two
//
// http://netbsd.gw.com/cgi-bin/man-cgi?clock_gettime
// https://github.com/jsonn/src/blob/HEAD/sys/kern/subr_time.c#L222
// Basically the same goes for NetBSD
pub const CLOCK_REALTIME: ::clockid_t = 0;
pub const CLOCK_MONOTONIC: ::clockid_t = 3;

pub const RLIMIT_CPU: ::c_int = 0;
pub const RLIMIT_FSIZE: ::c_int = 1;
pub const RLIMIT_DATA: ::c_int = 2;
pub const RLIMIT_STACK: ::c_int = 3;
pub const RLIMIT_CORE: ::c_int = 4;
pub const RLIMIT_RSS: ::c_int = 5;
pub const RLIMIT_MEMLOCK: ::c_int = 6;
pub const RLIMIT_NPROC: ::c_int = 7;
pub const RLIMIT_NOFILE: ::c_int = 8;

pub const RLIM_INFINITY: rlim_t = 0x7fff_ffff_ffff_ffff;
pub const RLIM_SAVED_MAX: rlim_t = RLIM_INFINITY;
pub const RLIM_SAVED_CUR: rlim_t = RLIM_INFINITY;

pub const RUSAGE_SELF: ::c_int = 0;
pub const RUSAGE_CHILDREN: ::c_int = -1;

pub const MADV_NORMAL: ::c_int = 0;
pub const MADV_RANDOM: ::c_int = 1;
pub const MADV_SEQUENTIAL: ::c_int = 2;
pub const MADV_WILLNEED: ::c_int = 3;
pub const MADV_DONTNEED: ::c_int = 4;
pub const MADV_FREE: ::c_int = 6;

pub const AF_UNSPEC: ::c_int = 0;
pub const AF_LOCAL: ::c_int = 1;
pub const AF_UNIX: ::c_int = AF_LOCAL;
pub const AF_INET: ::c_int = 2;
pub const AF_IMPLINK: ::c_int = 3;
pub const AF_PUP: ::c_int = 4;
pub const AF_CHAOS: ::c_int = 5;
pub const AF_NS: ::c_int = 6;
pub const AF_ISO: ::c_int = 7;
pub const AF_OSI: ::c_int = AF_ISO;
pub const AF_DATAKIT: ::c_int = 9;
pub const AF_CCITT: ::c_int = 10;
pub const AF_SNA: ::c_int = 11;
pub const AF_DECnet: ::c_int = 12;
pub const AF_DLI: ::c_int = 13;
pub const AF_LAT: ::c_int = 14;
pub const AF_HYLINK: ::c_int = 15;
pub const AF_APPLETALK: ::c_int = 16;
pub const AF_LINK: ::c_int = 18;
pub const pseudo_AF_XTP: ::c_int = 19;
pub const AF_COIP: ::c_int = 20;
pub const AF_CNT: ::c_int = 21;
pub const pseudo_AF_RTIP: ::c_int = 22;
pub const AF_IPX: ::c_int = 23;
pub const AF_INET6: ::c_int = 24;
pub const pseudo_AF_PIP: ::c_int = 25;
pub const AF_ISDN: ::c_int = 26;
pub const AF_E164: ::c_int = AF_ISDN;
pub const AF_NATM: ::c_int = 27;

pub const PF_UNSPEC: ::c_int = AF_UNSPEC;
pub const PF_LOCAL: ::c_int = AF_LOCAL;
pub const PF_UNIX: ::c_int = PF_LOCAL;
pub const PF_INET: ::c_int = AF_INET;
pub const PF_IMPLINK: ::c_int = AF_IMPLINK;
pub const PF_PUP: ::c_int = AF_PUP;
pub const PF_CHAOS: ::c_int = AF_CHAOS;
pub const PF_NS: ::c_int = AF_NS;
pub const PF_ISO: ::c_int = AF_ISO;
pub const PF_OSI: ::c_int = AF_ISO;
pub const PF_DATAKIT: ::c_int = AF_DATAKIT;
pub const PF_CCITT: ::c_int = AF_CCITT;
pub const PF_SNA: ::c_int = AF_SNA;
pub const PF_DECnet: ::c_int = AF_DECnet;
pub const PF_DLI: ::c_int = AF_DLI;
pub const PF_LAT: ::c_int = AF_LAT;
pub const PF_HYLINK: ::c_int = AF_HYLINK;
pub const PF_APPLETALK: ::c_int = AF_APPLETALK;
pub const PF_LINK: ::c_int = AF_LINK;
pub const PF_XTP: ::c_int = pseudo_AF_XTP;
pub const PF_COIP: ::c_int = AF_COIP;
pub const PF_CNT: ::c_int = AF_CNT;
pub const PF_IPX: ::c_int = AF_IPX;
pub const PF_INET6: ::c_int = AF_INET6;
pub const PF_RTIP: ::c_int = pseudo_AF_RTIP;
pub const PF_PIP: ::c_int = pseudo_AF_PIP;
pub const PF_ISDN: ::c_int = AF_ISDN;
pub const PF_NATM: ::c_int = AF_NATM;

pub const SOCK_STREAM: ::c_int = 1;
pub const SOCK_DGRAM: ::c_int = 2;
pub const SOCK_RAW: ::c_int = 3;
pub const SOCK_RDM: ::c_int = 4;
pub const SOCK_SEQPACKET: ::c_int = 5;
pub const IP_TTL: ::c_int = 4;
pub const IP_HDRINCL: ::c_int = 2;
pub const IP_ADD_MEMBERSHIP: ::c_int = 12;
pub const IP_DROP_MEMBERSHIP: ::c_int = 13;
pub const IPV6_RECVPKTINFO: ::c_int = 36;
pub const IPV6_PKTINFO: ::c_int = 46;
pub const IPV6_RECVTCLASS: ::c_int = 57;
pub const IPV6_TCLASS: ::c_int = 61;

pub const SOL_SOCKET: ::c_int = 0xffff;
pub const SO_DEBUG: ::c_int = 0x01;
pub const SO_ACCEPTCONN: ::c_int = 0x0002;
pub const SO_REUSEADDR: ::c_int = 0x0004;
pub const SO_KEEPALIVE: ::c_int = 0x0008;
pub const SO_DONTROUTE: ::c_int = 0x0010;
pub const SO_BROADCAST: ::c_int = 0x0020;
pub const SO_USELOOPBACK: ::c_int = 0x0040;
pub const SO_LINGER: ::c_int = 0x0080;
pub const SO_OOBINLINE: ::c_int = 0x0100;
pub const SO_REUSEPORT: ::c_int = 0x0200;
pub const SO_SNDBUF: ::c_int = 0x1001;
pub const SO_RCVBUF: ::c_int = 0x1002;
pub const SO_SNDLOWAT: ::c_int = 0x1003;
pub const SO_RCVLOWAT: ::c_int = 0x1004;
pub const SO_ERROR: ::c_int = 0x1007;
pub const SO_TYPE: ::c_int = 0x1008;

pub const SOMAXCONN: ::c_int = 128;

pub const MSG_OOB: ::c_int = 0x1;
pub const MSG_PEEK: ::c_int = 0x2;
pub const MSG_DONTROUTE: ::c_int = 0x4;
pub const MSG_EOR: ::c_int = 0x8;
pub const MSG_TRUNC: ::c_int = 0x10;
pub const MSG_CTRUNC: ::c_int = 0x20;
pub const MSG_WAITALL: ::c_int = 0x40;
pub const MSG_DONTWAIT: ::c_int = 0x80;
pub const MSG_BCAST: ::c_int = 0x100;
pub const MSG_MCAST: ::c_int = 0x200;
pub const MSG_NOSIGNAL: ::c_int = 0x400;
pub const MSG_CMSG_CLOEXEC: ::c_int = 0x800;

pub const SHUT_RD: ::c_int = 0;
pub const SHUT_WR: ::c_int = 1;
pub const SHUT_RDWR: ::c_int = 2;

pub const LOCK_SH: ::c_int = 1;
pub const LOCK_EX: ::c_int = 2;
pub const LOCK_NB: ::c_int = 4;
pub const LOCK_UN: ::c_int = 8;

pub const IPPROTO_RAW: ::c_int = 255;

pub const _SC_ARG_MAX: ::c_int = 1;
pub const _SC_CHILD_MAX: ::c_int = 2;
pub const _SC_NGROUPS_MAX: ::c_int = 4;
pub const _SC_OPEN_MAX: ::c_int = 5;
pub const _SC_JOB_CONTROL: ::c_int = 6;
pub const _SC_SAVED_IDS: ::c_int = 7;
pub const _SC_VERSION: ::c_int = 8;
pub const _SC_BC_BASE_MAX: ::c_int = 9;
pub const _SC_BC_DIM_MAX: ::c_int = 10;
pub const _SC_BC_SCALE_MAX: ::c_int = 11;
pub const _SC_BC_STRING_MAX: ::c_int = 12;
pub const _SC_COLL_WEIGHTS_MAX: ::c_int = 13;
pub const _SC_EXPR_NEST_MAX: ::c_int = 14;
pub const _SC_LINE_MAX: ::c_int = 15;
pub const _SC_RE_DUP_MAX: ::c_int = 16;
pub const _SC_2_VERSION: ::c_int = 17;
pub const _SC_2_C_BIND: ::c_int = 18;
pub const _SC_2_C_DEV: ::c_int = 19;
pub const _SC_2_CHAR_TERM: ::c_int = 20;
pub const _SC_2_FORT_DEV: ::c_int = 21;
pub const _SC_2_FORT_RUN: ::c_int = 22;
pub const _SC_2_LOCALEDEF: ::c_int = 23;
pub const _SC_2_SW_DEV: ::c_int = 24;
pub const _SC_2_UPE: ::c_int = 25;
pub const _SC_STREAM_MAX: ::c_int = 26;
pub const _SC_TZNAME_MAX: ::c_int = 27;
pub const _SC_PAGESIZE: ::c_int = 28;
pub const _SC_PAGE_SIZE: ::c_int = _SC_PAGESIZE;
pub const _SC_FSYNC: ::c_int = 29;
pub const _SC_XOPEN_SHM: ::c_int = 30;

pub const Q_GETQUOTA: ::c_int = 0x300;
pub const Q_SETQUOTA: ::c_int = 0x400;

pub const RTLD_GLOBAL: ::c_int = 0x100;

pub const LOG_NFACILITIES: ::c_int = 24;

pub const HW_NCPU: ::c_int = 3;

pub const B0: speed_t = 0;
pub const B50: speed_t = 50;
pub const B75: speed_t = 75;
pub const B110: speed_t = 110;
pub const B134: speed_t = 134;
pub const B150: speed_t = 150;
pub const B200: speed_t = 200;
pub const B300: speed_t = 300;
pub const B600: speed_t = 600;
pub const B1200: speed_t = 1200;
pub const B1800: speed_t = 1800;
pub const B2400: speed_t = 2400;
pub const B4800: speed_t = 4800;
pub const B9600: speed_t = 9600;
pub const B19200: speed_t = 19200;
pub const B38400: speed_t = 38400;
pub const B7200: speed_t = 7200;
pub const B14400: speed_t = 14400;
pub const B28800: speed_t = 28800;
pub const B57600: speed_t = 57600;
pub const B76800: speed_t = 76800;
pub const B115200: speed_t = 115200;
pub const B230400: speed_t = 230400;
pub const EXTA: speed_t = 19200;
pub const EXTB: speed_t = 38400;

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

pub const CRTSCTS: ::tcflag_t = 0x00010000;
pub const CRTS_IFLOW: ::tcflag_t = CRTSCTS;
pub const CCTS_OFLOW: ::tcflag_t = CRTSCTS;
pub const OCRNL: ::tcflag_t = 0x10;

pub const TIOCEXCL: ::c_ulong = 0x2000740d;
pub const TIOCNXCL: ::c_ulong = 0x2000740e;
pub const TIOCFLUSH: ::c_ulong = 0x80047410;
pub const TIOCGETA: ::c_ulong = 0x402c7413;
pub const TIOCSETA: ::c_ulong = 0x802c7414;
pub const TIOCSETAW: ::c_ulong = 0x802c7415;
pub const TIOCSETAF: ::c_ulong = 0x802c7416;
pub const TIOCGETD: ::c_ulong = 0x4004741a;
pub const TIOCSETD: ::c_ulong = 0x8004741b;
pub const TIOCMGET: ::c_ulong = 0x4004746a;
pub const TIOCMBIC: ::c_ulong = 0x8004746b;
pub const TIOCMBIS: ::c_ulong = 0x8004746c;
pub const TIOCMSET: ::c_ulong = 0x8004746d;
pub const TIOCSTART: ::c_ulong = 0x2000746e;
pub const TIOCSTOP: ::c_ulong = 0x2000746f;
pub const TIOCSCTTY: ::c_ulong = 0x20007461;
pub const TIOCGWINSZ: ::c_ulong = 0x40087468;
pub const TIOCSWINSZ: ::c_ulong = 0x80087467;
pub const TIOCM_LE: ::c_int = 0o0001;
pub const TIOCM_DTR: ::c_int = 0o0002;
pub const TIOCM_RTS: ::c_int = 0o0004;
pub const TIOCM_ST: ::c_int = 0o0010;
pub const TIOCM_SR: ::c_int = 0o0020;
pub const TIOCM_CTS: ::c_int = 0o0040;
pub const TIOCM_CAR: ::c_int = 0o0100;
pub const TIOCM_RNG: ::c_int = 0o0200;
pub const TIOCM_DSR: ::c_int = 0o0400;
pub const TIOCM_CD: ::c_int = TIOCM_CAR;
pub const TIOCM_RI: ::c_int = TIOCM_RNG;

// Flags for chflags(2)
pub const UF_SETTABLE: ::c_ulong = 0x0000ffff;
pub const UF_NODUMP: ::c_ulong = 0x00000001;
pub const UF_IMMUTABLE: ::c_ulong = 0x00000002;
pub const UF_APPEND: ::c_ulong = 0x00000004;
pub const UF_OPAQUE: ::c_ulong = 0x00000008;
pub const SF_SETTABLE: ::c_ulong = 0xffff0000;
pub const SF_ARCHIVED: ::c_ulong = 0x00010000;
pub const SF_IMMUTABLE: ::c_ulong = 0x00020000;
pub const SF_APPEND: ::c_ulong = 0x00040000;

pub const TIMER_ABSTIME: ::c_int = 1;

#[link(name = "util")]
extern "C" {
    pub fn setgrent();
    pub fn sem_destroy(sem: *mut sem_t) -> ::c_int;
    pub fn sem_init(
        sem: *mut sem_t,
        pshared: ::c_int,
        value: ::c_uint,
    ) -> ::c_int;

    pub fn daemon(nochdir: ::c_int, noclose: ::c_int) -> ::c_int;
    pub fn mincore(
        addr: *mut ::c_void,
        len: ::size_t,
        vec: *mut ::c_char,
    ) -> ::c_int;
    #[cfg_attr(target_os = "netbsd", link_name = "__clock_getres50")]
    pub fn clock_getres(clk_id: ::clockid_t, tp: *mut ::timespec) -> ::c_int;
    #[cfg_attr(target_os = "netbsd", link_name = "__clock_gettime50")]
    pub fn clock_gettime(clk_id: ::clockid_t, tp: *mut ::timespec) -> ::c_int;
    #[cfg_attr(target_os = "netbsd", link_name = "__clock_settime50")]
    pub fn clock_settime(
        clk_id: ::clockid_t,
        tp: *const ::timespec,
    ) -> ::c_int;
    pub fn __errno() -> *mut ::c_int;
    pub fn shm_open(
        name: *const ::c_char,
        oflag: ::c_int,
        mode: ::mode_t,
    ) -> ::c_int;
    pub fn memrchr(
        cx: *const ::c_void,
        c: ::c_int,
        n: ::size_t,
    ) -> *mut ::c_void;
    pub fn mkostemp(template: *mut ::c_char, flags: ::c_int) -> ::c_int;
    pub fn mkostemps(
        template: *mut ::c_char,
        suffixlen: ::c_int,
        flags: ::c_int,
    ) -> ::c_int;
    pub fn pwritev(
        fd: ::c_int,
        iov: *const ::iovec,
        iovcnt: ::c_int,
        offset: ::off_t,
    ) -> ::ssize_t;
    pub fn preadv(
        fd: ::c_int,
        iov: *const ::iovec,
        iovcnt: ::c_int,
        offset: ::off_t,
    ) -> ::ssize_t;
    pub fn futimens(fd: ::c_int, times: *const ::timespec) -> ::c_int;
    pub fn utimensat(
        dirfd: ::c_int,
        path: *const ::c_char,
        times: *const ::timespec,
        flag: ::c_int,
    ) -> ::c_int;
    pub fn fdatasync(fd: ::c_int) -> ::c_int;
    pub fn openpty(
        amaster: *mut ::c_int,
        aslave: *mut ::c_int,
        name: *mut ::c_char,
        termp: *mut termios,
        winp: *mut ::winsize,
    ) -> ::c_int;
    pub fn forkpty(
        amaster: *mut ::c_int,
        name: *mut ::c_char,
        termp: *mut termios,
        winp: *mut ::winsize,
    ) -> ::pid_t;
    pub fn login_tty(fd: ::c_int) -> ::c_int;
    pub fn getpriority(which: ::c_int, who: ::id_t) -> ::c_int;
    pub fn setpriority(which: ::c_int, who: ::id_t, prio: ::c_int) -> ::c_int;

    pub fn mknodat(
        dirfd: ::c_int,
        pathname: *const ::c_char,
        mode: ::mode_t,
        dev: dev_t,
    ) -> ::c_int;
    pub fn mkfifoat(
        dirfd: ::c_int,
        pathname: *const ::c_char,
        mode: ::mode_t,
    ) -> ::c_int;
    pub fn sem_timedwait(
        sem: *mut sem_t,
        abstime: *const ::timespec,
    ) -> ::c_int;
    pub fn sem_getvalue(sem: *mut sem_t, sval: *mut ::c_int) -> ::c_int;
    pub fn pthread_condattr_setclock(
        attr: *mut pthread_condattr_t,
        clock_id: ::clockid_t,
    ) -> ::c_int;
    pub fn sethostname(name: *const ::c_char, len: ::size_t) -> ::c_int;
    pub fn pthread_mutex_timedlock(
        lock: *mut pthread_mutex_t,
        abstime: *const ::timespec,
    ) -> ::c_int;
    pub fn pipe2(fds: *mut ::c_int, flags: ::c_int) -> ::c_int;

    pub fn getgrouplist(
        name: *const ::c_char,
        basegid: ::gid_t,
        groups: *mut ::gid_t,
        ngroups: *mut ::c_int,
    ) -> ::c_int;
    pub fn initgroups(name: *const ::c_char, basegid: ::gid_t) -> ::c_int;
    pub fn getdomainname(name: *mut ::c_char, len: ::size_t) -> ::c_int;
    pub fn setdomainname(name: *const ::c_char, len: ::size_t) -> ::c_int;
    pub fn uname(buf: *mut ::utsname) -> ::c_int;

    pub fn shmget(key: ::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;
    pub fn shmctl(
        shmid: ::c_int,
        cmd: ::c_int,
        buf: *mut ::shmid_ds,
    ) -> ::c_int;
}

cfg_if! {
    if #[cfg(target_os = "netbsd")] {
        mod netbsd;
        pub use self::netbsd::*;
    } else if #[cfg(target_os = "openbsd")] {
        mod openbsd;
        pub use self::openbsd::*;
    } else {
        // Unknown target_os
    }
}