mod.rs

//! Definitions found commonly among almost all Unix derivatives
//!
//! More functions and definitions can be found in the more specific modules
//! according to the platform in question.

pub type c_schar = i8;
pub type c_uchar = u8;
pub type c_short = i16;
pub type c_ushort = u16;
pub type c_int = i32;
pub type c_uint = u32;
pub type c_float = f32;
pub type c_double = f64;
pub type c_longlong = i64;
pub type c_ulonglong = u64;
pub type intmax_t = i64;
pub type uintmax_t = u64;

pub type size_t = usize;
pub type ptrdiff_t = isize;
pub type intptr_t = isize;
pub type uintptr_t = usize;
pub type ssize_t = isize;

pub type pid_t = i32;
pub type uid_t = u32;
pub type gid_t = u32;
pub type in_addr_t = u32;
pub type in_port_t = u16;
pub type sighandler_t = ::size_t;
pub type cc_t = ::c_uchar;

#[cfg_attr(feature = "extra_traits", derive(Debug))]
pub enum DIR {}
impl ::Copy for DIR {}
impl ::Clone for DIR {
    fn clone(&self) -> DIR {
        *self
    }
}
pub type locale_t = *mut ::c_void;

s! {
    pub struct group {
        pub gr_name: *mut ::c_char,
        pub gr_passwd: *mut ::c_char,
        pub gr_gid: ::gid_t,
        pub gr_mem: *mut *mut ::c_char,
    }

    pub struct utimbuf {
        pub actime: time_t,
        pub modtime: time_t,
    }

    pub struct timeval {
        pub tv_sec: time_t,
        pub tv_usec: suseconds_t,
    }

    // linux x32 compatibility
    // See https://sourceware.org/bugzilla/show_bug.cgi?id=16437
    pub struct timespec {
        pub tv_sec: time_t,
        #[cfg(all(target_arch = "x86_64", target_pointer_width = "32"))]
        pub tv_nsec: i64,
        #[cfg(not(all(target_arch = "x86_64", target_pointer_width = "32")))]
        pub tv_nsec: ::c_long,
    }

    pub struct rlimit {
        pub rlim_cur: rlim_t,
        pub rlim_max: rlim_t,
    }

    pub struct rusage {
        pub ru_utime: timeval,
        pub ru_stime: timeval,
        pub ru_maxrss: c_long,
        #[cfg(all(target_arch = "x86_64", target_pointer_width = "32"))]
        __pad1: u32,
        pub ru_ixrss: c_long,
        #[cfg(all(target_arch = "x86_64", target_pointer_width = "32"))]
        __pad2: u32,
        pub ru_idrss: c_long,
        #[cfg(all(target_arch = "x86_64", target_pointer_width = "32"))]
        __pad3: u32,
        pub ru_isrss: c_long,
        #[cfg(all(target_arch = "x86_64", target_pointer_width = "32"))]
        __pad4: u32,
        pub ru_minflt: c_long,
        #[cfg(all(target_arch = "x86_64", target_pointer_width = "32"))]
        __pad5: u32,
        pub ru_majflt: c_long,
        #[cfg(all(target_arch = "x86_64", target_pointer_width = "32"))]
        __pad6: u32,
        pub ru_nswap: c_long,
        #[cfg(all(target_arch = "x86_64", target_pointer_width = "32"))]
        __pad7: u32,
        pub ru_inblock: c_long,
        #[cfg(all(target_arch = "x86_64", target_pointer_width = "32"))]
        __pad8: u32,
        pub ru_oublock: c_long,
        #[cfg(all(target_arch = "x86_64", target_pointer_width = "32"))]
        __pad9: u32,
        pub ru_msgsnd: c_long,
        #[cfg(all(target_arch = "x86_64", target_pointer_width = "32"))]
        __pad10: u32,
        pub ru_msgrcv: c_long,
        #[cfg(all(target_arch = "x86_64", target_pointer_width = "32"))]
        __pad11: u32,
        pub ru_nsignals: c_long,
        #[cfg(all(target_arch = "x86_64", target_pointer_width = "32"))]
        __pad12: u32,
        pub ru_nvcsw: c_long,
        #[cfg(all(target_arch = "x86_64", target_pointer_width = "32"))]
        __pad13: u32,
        pub ru_nivcsw: c_long,
        #[cfg(all(target_arch = "x86_64", target_pointer_width = "32"))]
        __pad14: u32,

        #[cfg(any(target_env = "musl", target_os = "emscripten"))]
        __reserved: [c_long; 16],
    }

    pub struct ipv6_mreq {
        pub ipv6mr_multiaddr: in6_addr,
        #[cfg(target_os = "android")]
        pub ipv6mr_interface: ::c_int,
        #[cfg(not(target_os = "android"))]
        pub ipv6mr_interface: ::c_uint,
    }

    pub struct hostent {
        pub h_name: *mut ::c_char,
        pub h_aliases: *mut *mut ::c_char,
        pub h_addrtype: ::c_int,
        pub h_length: ::c_int,
        pub h_addr_list: *mut *mut ::c_char,
    }

    pub struct iovec {
        pub iov_base: *mut ::c_void,
        pub iov_len: ::size_t,
    }

    pub struct pollfd {
        pub fd: ::c_int,
        pub events: ::c_short,
        pub revents: ::c_short,
    }

    pub struct winsize {
        pub ws_row: ::c_ushort,
        pub ws_col: ::c_ushort,
        pub ws_xpixel: ::c_ushort,
        pub ws_ypixel: ::c_ushort,
    }

    pub struct linger {
        pub l_onoff: ::c_int,
        pub l_linger: ::c_int,
    }

    pub struct sigval {
        // Actually a union of an int and a void*
        pub sival_ptr: *mut ::c_void
    }

    // <sys/time.h>
    pub struct itimerval {
        pub it_interval: ::timeval,
        pub it_value: ::timeval,
    }

    // <sys/times.h>
    pub struct tms {
        pub tms_utime: ::clock_t,
        pub tms_stime: ::clock_t,
        pub tms_cutime: ::clock_t,
        pub tms_cstime: ::clock_t,
    }

    pub struct servent {
        pub s_name: *mut ::c_char,
        pub s_aliases: *mut *mut ::c_char,
        pub s_port: ::c_int,
        pub s_proto: *mut ::c_char,
    }

    pub struct protoent {
        pub p_name: *mut ::c_char,
        pub p_aliases: *mut *mut ::c_char,
        pub p_proto: ::c_int,
    }
}

pub const INT_MIN: c_int = -2147483648;
pub const INT_MAX: c_int = 2147483647;

pub const SIG_DFL: sighandler_t = 0 as sighandler_t;
pub const SIG_IGN: sighandler_t = 1 as sighandler_t;
pub const SIG_ERR: sighandler_t = !0 as sighandler_t;

pub const DT_UNKNOWN: u8 = 0;
pub const DT_FIFO: u8 = 1;
pub const DT_CHR: u8 = 2;
pub const DT_DIR: u8 = 4;
pub const DT_BLK: u8 = 6;
pub const DT_REG: u8 = 8;
pub const DT_LNK: u8 = 10;
pub const DT_SOCK: u8 = 12;

cfg_if! {
    if #[cfg(not(target_os = "redox"))] {
        pub const FD_CLOEXEC: ::c_int = 0x1;
    }
}

pub const USRQUOTA: ::c_int = 0;
pub const GRPQUOTA: ::c_int = 1;

pub const SIGIOT: ::c_int = 6;

pub const S_ISUID: ::mode_t = 0x800;
pub const S_ISGID: ::mode_t = 0x400;
pub const S_ISVTX: ::mode_t = 0x200;

cfg_if! {
    if #[cfg(not(any(target_os = "illumos", target_os = "solaris")))] {
        pub const IF_NAMESIZE: ::size_t = 16;
        pub const IFNAMSIZ: ::size_t = IF_NAMESIZE;
    }
}

pub const LOG_EMERG: ::c_int = 0;
pub const LOG_ALERT: ::c_int = 1;
pub const LOG_CRIT: ::c_int = 2;
pub const LOG_ERR: ::c_int = 3;
pub const LOG_WARNING: ::c_int = 4;
pub const LOG_NOTICE: ::c_int = 5;
pub const LOG_INFO: ::c_int = 6;
pub const LOG_DEBUG: ::c_int = 7;

pub const LOG_KERN: ::c_int = 0;
pub const LOG_USER: ::c_int = 1 << 3;
pub const LOG_MAIL: ::c_int = 2 << 3;
pub const LOG_DAEMON: ::c_int = 3 << 3;
pub const LOG_AUTH: ::c_int = 4 << 3;
pub const LOG_SYSLOG: ::c_int = 5 << 3;
pub const LOG_LPR: ::c_int = 6 << 3;
pub const LOG_NEWS: ::c_int = 7 << 3;
pub const LOG_UUCP: ::c_int = 8 << 3;
pub const LOG_LOCAL0: ::c_int = 16 << 3;
pub const LOG_LOCAL1: ::c_int = 17 << 3;
pub const LOG_LOCAL2: ::c_int = 18 << 3;
pub const LOG_LOCAL3: ::c_int = 19 << 3;
pub const LOG_LOCAL4: ::c_int = 20 << 3;
pub const LOG_LOCAL5: ::c_int = 21 << 3;
pub const LOG_LOCAL6: ::c_int = 22 << 3;
pub const LOG_LOCAL7: ::c_int = 23 << 3;

pub const LOG_PID: ::c_int = 0x01;
pub const LOG_CONS: ::c_int = 0x02;
pub const LOG_ODELAY: ::c_int = 0x04;
pub const LOG_NDELAY: ::c_int = 0x08;
pub const LOG_NOWAIT: ::c_int = 0x10;

pub const LOG_PRIMASK: ::c_int = 7;
pub const LOG_FACMASK: ::c_int = 0x3f8;

pub const PRIO_MIN: ::c_int = -20;
pub const PRIO_MAX: ::c_int = 20;

pub const IPPROTO_ICMP: ::c_int = 1;
pub const IPPROTO_ICMPV6: ::c_int = 58;
pub const IPPROTO_TCP: ::c_int = 6;
pub const IPPROTO_UDP: ::c_int = 17;
pub const IPPROTO_IP: ::c_int = 0;
pub const IPPROTO_IPV6: ::c_int = 41;

pub const INADDR_LOOPBACK: in_addr_t = 2130706433;
pub const INADDR_ANY: in_addr_t = 0;
pub const INADDR_BROADCAST: in_addr_t = 4294967295;
pub const INADDR_NONE: in_addr_t = 4294967295;

pub const ARPOP_REQUEST: u16 = 1;
pub const ARPOP_REPLY: u16 = 2;

pub const ATF_COM: ::c_int = 0x02;
pub const ATF_PERM: ::c_int = 0x04;
pub const ATF_PUBL: ::c_int = 0x08;
pub const ATF_USETRAILERS: ::c_int = 0x10;

cfg_if! {
    if #[cfg(target_os = "l4re")] {
        // required libraries for L4Re are linked externally, ATM
    } else if #[cfg(feature = "std")] {
        // cargo build, don't pull in anything extra as the libstd dep
        // already pulls in all libs.
    } else if #[cfg(all(target_os = "linux",
                        target_env = "gnu",
                        feature = "rustc-dep-of-std"))] {
        #[link(name = "util", kind = "static-nobundle",
            cfg(target_feature = "crt-static"))]
        #[link(name = "rt", kind = "static-nobundle",
            cfg(target_feature = "crt-static"))]
        #[link(name = "pthread", kind = "static-nobundle",
            cfg(target_feature = "crt-static"))]
        #[link(name = "m", kind = "static-nobundle",
            cfg(target_feature = "crt-static"))]
        #[link(name = "dl", kind = "static-nobundle",
            cfg(target_feature = "crt-static"))]
        #[link(name = "c", kind = "static-nobundle",
            cfg(target_feature = "crt-static"))]
        #[link(name = "gcc_eh", kind = "static-nobundle",
            cfg(target_feature = "crt-static"))]
        #[link(name = "gcc", kind = "static-nobundle",
            cfg(target_feature = "crt-static"))]
        #[link(name = "util", cfg(not(target_feature = "crt-static")))]
        #[link(name = "rt", cfg(not(target_feature = "crt-static")))]
        #[link(name = "pthread", cfg(not(target_feature = "crt-static")))]
        #[link(name = "m", cfg(not(target_feature = "crt-static")))]
        #[link(name = "dl", cfg(not(target_feature = "crt-static")))]
        #[link(name = "c", cfg(not(target_feature = "crt-static")))]
        extern {}
    } else if #[cfg(target_env = "musl")] {
        #[cfg_attr(feature = "rustc-dep-of-std",
                   link(name = "c", kind = "static",
                        cfg(target_feature = "crt-static")))]
        #[cfg_attr(feature = "rustc-dep-of-std",
                   link(name = "c", cfg(not(target_feature = "crt-static"))))]
        extern {}
    } else if #[cfg(target_os = "emscripten")] {
        #[link(name = "c")]
        extern {}
    } else if #[cfg(all(target_os = "netbsd",
                        feature = "rustc-dep-of-std",
                        target_vendor = "rumprun"))] {
        // Since we don't use -nodefaultlibs on Rumprun, libc is always pulled
        // in automatically by the linker. We avoid passing it explicitly, as it
        // causes some versions of binutils to crash with an assertion failure.
        #[link(name = "m")]
        extern {}
    } else if #[cfg(any(target_os = "macos",
                        target_os = "ios",
                        target_os = "android",
                        target_os = "openbsd"))] {
        #[link(name = "c")]
        #[link(name = "m")]
        extern {}
    } else if #[cfg(target_os = "haiku")] {
        #[link(name = "root")]
        #[link(name = "network")]
        extern {}
    } else if #[cfg(target_env = "newlib")] {
        #[link(name = "c")]
        #[link(name = "m")]
        extern {}
    } else if #[cfg(target_os = "hermit")] {
        // no_default_libraries is set to false for HermitCore, so only a link
        // to "pthread" needs to be added.
        #[link(name = "pthread")]
        extern {}
    } else if #[cfg(target_env = "illumos")] {
        #[link(name = "c")]
        #[link(name = "m")]
        extern {}
    } else if #[cfg(target_os = "redox")] {
        #[cfg_attr(feature = "rustc-dep-of-std",
                   link(name = "c", kind = "static-nobundle",
                        cfg(target_feature = "crt-static")))]
        #[cfg_attr(feature = "rustc-dep-of-std",
                   link(name = "c", cfg(not(target_feature = "crt-static"))))]
        extern {}
    } else {
        #[link(name = "c")]
        #[link(name = "m")]
        #[link(name = "rt")]
        #[link(name = "pthread")]
        extern {}
    }
}

#[cfg_attr(feature = "extra_traits", derive(Debug))]
pub enum FILE {}
impl ::Copy for FILE {}
impl ::Clone for FILE {
    fn clone(&self) -> FILE {
        *self
    }
}
#[cfg_attr(feature = "extra_traits", derive(Debug))]
pub enum fpos_t {} // FIXME: fill this out with a struct
impl ::Copy for fpos_t {}
impl ::Clone for fpos_t {
    fn clone(&self) -> fpos_t {
        *self
    }
}

extern "C" {
    pub fn isalnum(c: c_int) -> c_int;
    pub fn isalpha(c: c_int) -> c_int;
    pub fn iscntrl(c: c_int) -> c_int;
    pub fn isdigit(c: c_int) -> c_int;
    pub fn isgraph(c: c_int) -> c_int;
    pub fn islower(c: c_int) -> c_int;
    pub fn isprint(c: c_int) -> c_int;
    pub fn ispunct(c: c_int) -> c_int;
    pub fn isspace(c: c_int) -> c_int;
    pub fn isupper(c: c_int) -> c_int;
    pub fn isxdigit(c: c_int) -> c_int;
    pub fn isblank(c: c_int) -> c_int;
    pub fn tolower(c: c_int) -> c_int;
    pub fn toupper(c: c_int) -> c_int;
    pub fn qsort(
        base: *mut c_void,
        num: size_t,
        size: size_t,
        compar: ::Option<
            unsafe extern "C" fn(*const c_void, *const c_void) -> c_int,
        >,
    );
    pub fn bsearch(
        key: *const c_void,
        base: *const c_void,
        num: size_t,
        size: size_t,
        compar: ::Option<
            unsafe extern "C" fn(*const c_void, *const c_void) -> c_int,
        >,
    ) -> *mut c_void;
    #[cfg_attr(
        all(target_os = "macos", target_arch = "x86"),
        link_name = "fopen$UNIX2003"
    )]
    pub fn fopen(filename: *const c_char, mode: *const c_char) -> *mut FILE;
    #[cfg_attr(
        all(target_os = "macos", target_arch = "x86"),
        link_name = "freopen$UNIX2003"
    )]
    pub fn freopen(
        filename: *const c_char,
        mode: *const c_char,
        file: *mut FILE,
    ) -> *mut FILE;
    pub fn fmemopen(
        buf: *mut c_void,
        size: size_t,
        mode: *const c_char,
    ) -> *mut FILE;
    pub fn open_memstream(
        ptr: *mut *mut c_char,
        sizeloc: *mut size_t,
    ) -> *mut FILE;
    pub fn open_wmemstream(
        ptr: *mut *mut wchar_t,
        sizeloc: *mut size_t,
    ) -> *mut FILE;
    pub fn fflush(file: *mut FILE) -> c_int;
    pub fn fclose(file: *mut FILE) -> c_int;
    pub fn remove(filename: *const c_char) -> c_int;
    pub fn rename(oldname: *const c_char, newname: *const c_char) -> c_int;
    pub fn tmpfile() -> *mut FILE;
    pub fn setvbuf(
        stream: *mut FILE,
        buffer: *mut c_char,
        mode: c_int,
        size: size_t,
    ) -> c_int;
    pub fn setbuf(stream: *mut FILE, buf: *mut c_char);
    pub fn getchar() -> c_int;
    pub fn putchar(c: c_int) -> c_int;
    pub fn fgetc(stream: *mut FILE) -> c_int;
    pub fn fgets(buf: *mut c_char, n: c_int, stream: *mut FILE)
        -> *mut c_char;
    pub fn fputc(c: c_int, stream: *mut FILE) -> c_int;
    #[cfg_attr(
        all(target_os = "macos", target_arch = "x86"),
        link_name = "fputs$UNIX2003"
    )]
    pub fn fputs(s: *const c_char, stream: *mut FILE) -> c_int;
    pub fn puts(s: *const c_char) -> c_int;
    pub fn ungetc(c: c_int, stream: *mut FILE) -> c_int;
    pub fn fread(
        ptr: *mut c_void,
        size: size_t,
        nobj: size_t,
        stream: *mut FILE,
    ) -> size_t;
    #[cfg_attr(
        all(target_os = "macos", target_arch = "x86"),
        link_name = "fwrite$UNIX2003"
    )]
    pub fn fwrite(
        ptr: *const c_void,
        size: size_t,
        nobj: size_t,
        stream: *mut FILE,
    ) -> size_t;
    pub fn fseek(stream: *mut FILE, offset: c_long, whence: c_int) -> c_int;
    pub fn ftell(stream: *mut FILE) -> c_long;
    pub fn rewind(stream: *mut FILE);
    #[cfg_attr(target_os = "netbsd", link_name = "__fgetpos50")]
    pub fn fgetpos(stream: *mut FILE, ptr: *mut fpos_t) -> c_int;
    #[cfg_attr(target_os = "netbsd", link_name = "__fsetpos50")]
    pub fn fsetpos(stream: *mut FILE, ptr: *const fpos_t) -> c_int;
    pub fn feof(stream: *mut FILE) -> c_int;
    pub fn ferror(stream: *mut FILE) -> c_int;
    pub fn clearerr(stream: *mut FILE);
    pub fn perror(s: *const c_char);
    pub fn atoi(s: *const c_char) -> c_int;
    #[cfg_attr(
        all(target_os = "macos", target_arch = "x86"),
        link_name = "strtod$UNIX2003"
    )]
    pub fn strtod(s: *const c_char, endp: *mut *mut c_char) -> c_double;
    pub fn strtol(
        s: *const c_char,
        endp: *mut *mut c_char,
        base: c_int,
    ) -> c_long;
    pub fn strtoul(
        s: *const c_char,
        endp: *mut *mut c_char,
        base: c_int,
    ) -> c_ulong;
    pub fn calloc(nobj: size_t, size: size_t) -> *mut c_void;
    pub fn malloc(size: size_t) -> *mut c_void;
    pub fn realloc(p: *mut c_void, size: size_t) -> *mut c_void;
    pub fn free(p: *mut c_void);
    pub fn abort() -> !;
    pub fn exit(status: c_int) -> !;
    pub fn _exit(status: c_int) -> !;
    pub fn atexit(cb: extern "C" fn()) -> c_int;
    #[cfg_attr(
        all(target_os = "macos", target_arch = "x86"),
        link_name = "system$UNIX2003"
    )]
    pub fn system(s: *const c_char) -> c_int;
    pub fn getenv(s: *const c_char) -> *mut c_char;

    pub fn strcpy(dst: *mut c_char, src: *const c_char) -> *mut c_char;
    pub fn strncpy(
        dst: *mut c_char,
        src: *const c_char,
        n: size_t,
    ) -> *mut c_char;
    pub fn strcat(s: *mut c_char, ct: *const c_char) -> *mut c_char;
    pub fn strncat(
        s: *mut c_char,
        ct: *const c_char,
        n: size_t,
    ) -> *mut c_char;
    pub fn strcmp(cs: *const c_char, ct: *const c_char) -> c_int;
    pub fn strncmp(cs: *const c_char, ct: *const c_char, n: size_t) -> c_int;
    pub fn strcoll(cs: *const c_char, ct: *const c_char) -> c_int;
    pub fn strchr(cs: *const c_char, c: c_int) -> *mut c_char;
    pub fn strrchr(cs: *const c_char, c: c_int) -> *mut c_char;
    pub fn strspn(cs: *const c_char, ct: *const c_char) -> size_t;
    pub fn strcspn(cs: *const c_char, ct: *const c_char) -> size_t;
    pub fn strdup(cs: *const c_char) -> *mut c_char;
    pub fn strndup(cs: *const c_char, n: size_t) -> *mut c_char;
    pub fn strpbrk(cs: *const c_char, ct: *const c_char) -> *mut c_char;
    pub fn strstr(cs: *const c_char, ct: *const c_char) -> *mut c_char;
    pub fn strcasecmp(s1: *const c_char, s2: *const c_char) -> c_int;
    pub fn strncasecmp(
        s1: *const c_char,
        s2: *const c_char,
        n: size_t,
    ) -> c_int;
    pub fn strlen(cs: *const c_char) -> size_t;
    pub fn strnlen(cs: *const c_char, maxlen: size_t) -> size_t;
    #[cfg_attr(
        all(target_os = "macos", target_arch = "x86"),
        link_name = "strerror$UNIX2003"
    )]
    pub fn strerror(n: c_int) -> *mut c_char;
    pub fn strtok(s: *mut c_char, t: *const c_char) -> *mut c_char;
    pub fn strxfrm(s: *mut c_char, ct: *const c_char, n: size_t) -> size_t;
    pub fn strsignal(sig: c_int) -> *mut c_char;
    pub fn wcslen(buf: *const wchar_t) -> size_t;
    pub fn wcstombs(
        dest: *mut c_char,
        src: *const wchar_t,
        n: size_t,
    ) -> ::size_t;

    pub fn memchr(cx: *const c_void, c: c_int, n: size_t) -> *mut c_void;
    pub fn wmemchr(cx: *const wchar_t, c: wchar_t, n: size_t) -> *mut wchar_t;
    pub fn memcmp(cx: *const c_void, ct: *const c_void, n: size_t) -> c_int;
    pub fn memcpy(
        dest: *mut c_void,
        src: *const c_void,
        n: size_t,
    ) -> *mut c_void;
    pub fn memmove(
        dest: *mut c_void,
        src: *const c_void,
        n: size_t,
    ) -> *mut c_void;
    pub fn memset(dest: *mut c_void, c: c_int, n: size_t) -> *mut c_void;
}

extern "C" {
    #[cfg_attr(target_os = "netbsd", link_name = "__getpwnam50")]
    pub fn getpwnam(name: *const ::c_char) -> *mut passwd;
    #[cfg_attr(target_os = "netbsd", link_name = "__getpwuid50")]
    pub fn getpwuid(uid: ::uid_t) -> *mut passwd;

    pub fn fprintf(
        stream: *mut ::FILE,
        format: *const ::c_char,
        ...
    ) -> ::c_int;
    pub fn printf(format: *const ::c_char, ...) -> ::c_int;
    pub fn snprintf(
        s: *mut ::c_char,
        n: ::size_t,
        format: *const ::c_char,
        ...
    ) -> ::c_int;
    pub fn sprintf(s: *mut ::c_char, format: *const ::c_char, ...) -> ::c_int;
    #[cfg_attr(target_os = "linux", link_name = "__isoc99_fscanf")]
    pub fn fscanf(
        stream: *mut ::FILE,
        format: *const ::c_char,
        ...
    ) -> ::c_int;
    #[cfg_attr(target_os = "linux", link_name = "__isoc99_scanf")]
    pub fn scanf(format: *const ::c_char, ...) -> ::c_int;
    #[cfg_attr(target_os = "linux", link_name = "__isoc99_sscanf")]
    pub fn sscanf(s: *const ::c_char, format: *const ::c_char, ...)
        -> ::c_int;
    pub fn getchar_unlocked() -> ::c_int;
    pub fn putchar_unlocked(c: ::c_int) -> ::c_int;

    #[cfg(not(all(libc_cfg_target_vendor, target_arch = "powerpc",
          target_vendor = "nintendo")))]
    #[cfg_attr(target_os = "netbsd", link_name = "__socket30")]
    #[cfg_attr(target_os = "illumos", link_name = "__xnet_socket")]
    pub fn socket(domain: ::c_int, ty: ::c_int, protocol: ::c_int) -> ::c_int;
    #[cfg(not(all(libc_cfg_target_vendor, target_arch = "powerpc",
          target_vendor = "nintendo")))]
    #[cfg_attr(
        all(target_os = "macos", target_arch = "x86"),
        link_name = "connect$UNIX2003"
    )]
    #[cfg_attr(target_os = "illumos", link_name = "__xnet_connect")]
    pub fn connect(
        socket: ::c_int,
        address: *const sockaddr,
        len: socklen_t,
    ) -> ::c_int;
    #[cfg_attr(
        all(target_os = "macos", target_arch = "x86"),
        link_name = "listen$UNIX2003"
    )]
    pub fn listen(socket: ::c_int, backlog: ::c_int) -> ::c_int;
    #[cfg(not(all(libc_cfg_target_vendor, target_arch = "powerpc",
          target_vendor = "nintendo")))]
    #[cfg_attr(
        all(target_os = "macos", target_arch = "x86"),
        link_name = "accept$UNIX2003"
    )]
    pub fn accept(
        socket: ::c_int,
        address: *mut sockaddr,
        address_len: *mut socklen_t,
    ) -> ::c_int;
    #[cfg(not(all(libc_cfg_target_vendor, target_arch = "powerpc",
          target_vendor = "nintendo")))]
    #[cfg_attr(
        all(target_os = "macos", target_arch = "x86"),
        link_name = "getpeername$UNIX2003"
    )]
    pub fn getpeername(
        socket: ::c_int,
        address: *mut sockaddr,
        address_len: *mut socklen_t,
    ) -> ::c_int;
    #[cfg(not(all(libc_cfg_target_vendor, target_arch = "powerpc",
          target_vendor = "nintendo")))]
    #[cfg_attr(
        all(target_os = "macos", target_arch = "x86"),
        link_name = "getsockname$UNIX2003"
    )]
    pub fn getsockname(
        socket: ::c_int,
        address: *mut sockaddr,
        address_len: *mut socklen_t,
    ) -> ::c_int;
    pub fn setsockopt(
        socket: ::c_int,
        level: ::c_int,
        name: ::c_int,
        value: *const ::c_void,
        option_len: socklen_t,
    ) -> ::c_int;
    #[cfg_attr(
        all(target_os = "macos", target_arch = "x86"),
        link_name = "socketpair$UNIX2003"
    )]
    #[cfg_attr(target_os = "illumos", link_name = "__xnet_socketpair")]
    pub fn socketpair(
        domain: ::c_int,
        type_: ::c_int,
        protocol: ::c_int,
        socket_vector: *mut ::c_int,
    ) -> ::c_int;
    #[cfg(not(all(libc_cfg_target_vendor, target_arch = "powerpc",
          target_vendor = "nintendo")))]
    #[cfg_attr(
        all(target_os = "macos", target_arch = "x86"),
        link_name = "sendto$UNIX2003"
    )]
    #[cfg_attr(target_os = "illumos", link_name = "__xnet_sendto")]
    pub fn sendto(
        socket: ::c_int,
        buf: *const ::c_void,
        len: ::size_t,
        flags: ::c_int,
        addr: *const sockaddr,
        addrlen: socklen_t,
    ) -> ::ssize_t;
    pub fn shutdown(socket: ::c_int, how: ::c_int) -> ::c_int;

    #[cfg_attr(
        all(target_os = "macos", target_arch = "x86"),
        link_name = "chmod$UNIX2003"
    )]
    pub fn chmod(path: *const c_char, mode: mode_t) -> ::c_int;
    #[cfg_attr(
        all(target_os = "macos", target_arch = "x86"),
        link_name = "fchmod$UNIX2003"
    )]
    pub fn fchmod(fd: ::c_int, mode: mode_t) -> ::c_int;

    #[cfg_attr(
        all(target_os = "macos", not(target_arch = "aarch64")),
        link_name = "fstat$INODE64"
    )]
    #[cfg_attr(target_os = "netbsd", link_name = "__fstat50")]
    #[cfg_attr(
        all(target_os = "freebsd", any(freebsd11, freebsd10)),
        link_name = "fstat@FBSD_1.0"
    )]
    pub fn fstat(fildes: ::c_int, buf: *mut stat) -> ::c_int;

    pub fn mkdir(path: *const c_char, mode: mode_t) -> ::c_int;

    #[cfg_attr(
        all(target_os = "macos", not(target_arch = "aarch64")),
        link_name = "stat$INODE64"
    )]
    #[cfg_attr(target_os = "netbsd", link_name = "__stat50")]
    #[cfg_attr(
        all(target_os = "freebsd", any(freebsd11, freebsd10)),
        link_name = "stat@FBSD_1.0"
    )]
    pub fn stat(path: *const c_char, buf: *mut stat) -> ::c_int;

    pub fn pclose(stream: *mut ::FILE) -> ::c_int;
    #[cfg_attr(
        all(target_os = "macos", target_arch = "x86"),
        link_name = "fdopen$UNIX2003"
    )]
    pub fn fdopen(fd: ::c_int, mode: *const c_char) -> *mut ::FILE;
    pub fn fileno(stream: *mut ::FILE) -> ::c_int;

    #[cfg_attr(
        all(target_os = "macos", target_arch = "x86"),
        link_name = "open$UNIX2003"
    )]
    pub fn open(path: *const c_char, oflag: ::c_int, ...) -> ::c_int;
    #[cfg_attr(
        all(target_os = "macos", target_arch = "x86"),
        link_name = "creat$UNIX2003"
    )]
    pub fn creat(path: *const c_char, mode: mode_t) -> ::c_int;
    #[cfg_attr(
        all(target_os = "macos", target_arch = "x86"),
        link_name = "fcntl$UNIX2003"
    )]
    pub fn fcntl(fd: ::c_int, cmd: ::c_int, ...) -> ::c_int;

    #[cfg_attr(
        all(target_os = "macos", target_arch = "x86_64"),
        link_name = "opendir$INODE64"
    )]
    #[cfg_attr(
        all(target_os = "macos", target_arch = "x86"),
        link_name = "opendir$INODE64$UNIX2003"
    )]
    #[cfg_attr(target_os = "netbsd", link_name = "__opendir30")]
    pub fn opendir(dirname: *const c_char) -> *mut ::DIR;

    #[cfg_attr(
        all(target_os = "macos", not(target_arch = "aarch64")),
        link_name = "readdir$INODE64"
    )]
    #[cfg_attr(target_os = "netbsd", link_name = "__readdir30")]
    #[cfg_attr(
        all(target_os = "freebsd", any(freebsd11, freebsd10)),
        link_name = "readdir@FBSD_1.0"
    )]
    pub fn readdir(dirp: *mut ::DIR) -> *mut ::dirent;
    #[cfg_attr(
        all(target_os = "macos", target_arch = "x86"),
        link_name = "closedir$UNIX2003"
    )]
    pub fn closedir(dirp: *mut ::DIR) -> ::c_int;
    #[cfg_attr(
        all(target_os = "macos", target_arch = "x86_64"),
        link_name = "rewinddir$INODE64"
    )]
    #[cfg_attr(
        all(target_os = "macos", target_arch = "x86"),
        link_name = "rewinddir$INODE64$UNIX2003"
    )]
    pub fn rewinddir(dirp: *mut ::DIR);

    pub fn fchmodat(
        dirfd: ::c_int,
        pathname: *const ::c_char,
        mode: ::mode_t,
        flags: ::c_int,
    ) -> ::c_int;
    pub fn fchown(fd: ::c_int, owner: ::uid_t, group: ::gid_t) -> ::c_int;
    pub fn fchownat(
        dirfd: ::c_int,
        pathname: *const ::c_char,
        owner: ::uid_t,
        group: ::gid_t,
        flags: ::c_int,
    ) -> ::c_int;
    #[cfg_attr(
        all(target_os = "macos", not(target_arch = "aarch64")),
        link_name = "fstatat$INODE64"
    )]
    #[cfg_attr(
        all(target_os = "freebsd", any(freebsd11, freebsd10)),
        link_name = "fstatat@FBSD_1.1"
    )]
    pub fn fstatat(
        dirfd: ::c_int,
        pathname: *const ::c_char,
        buf: *mut stat,
        flags: ::c_int,
    ) -> ::c_int;
    pub fn linkat(
        olddirfd: ::c_int,
        oldpath: *const ::c_char,
        newdirfd: ::c_int,
        newpath: *const ::c_char,
        flags: ::c_int,
    ) -> ::c_int;
    pub fn renameat(
        olddirfd: ::c_int,
        oldpath: *const ::c_char,
        newdirfd: ::c_int,
        newpath: *const ::c_char,
    ) -> ::c_int;
    pub fn symlinkat(
        target: *const ::c_char,
        newdirfd: ::c_int,
        linkpath: *const ::c_char,
    ) -> ::c_int;
    pub fn unlinkat(
        dirfd: ::c_int,
        pathname: *const ::c_char,
        flags: ::c_int,
    ) -> ::c_int;

    pub fn access(path: *const c_char, amode: ::c_int) -> ::c_int;
    pub fn alarm(seconds: ::c_uint) -> ::c_uint;
    pub fn chdir(dir: *const c_char) -> ::c_int;
    pub fn fchdir(dirfd: ::c_int) -> ::c_int;
    pub fn chown(path: *const c_char, uid: uid_t, gid: gid_t) -> ::c_int;
    #[cfg_attr(
        all(target_os = "macos", target_arch = "x86"),
        link_name = "lchown$UNIX2003"
    )]
    pub fn lchown(path: *const c_char, uid: uid_t, gid: gid_t) -> ::c_int;
    #[cfg_attr(
        all(target_os = "macos", target_arch = "x86"),
        link_name = "close$NOCANCEL$UNIX2003"
    )]
    #[cfg_attr(
        all(target_os = "macos", target_arch = "x86_64"),
        link_name = "close$NOCANCEL"
    )]
    pub fn close(fd: ::c_int) -> ::c_int;
    pub fn dup(fd: ::c_int) -> ::c_int;
    pub fn dup2(src: ::c_int, dst: ::c_int) -> ::c_int;
    pub fn execl(path: *const c_char, arg0: *const c_char, ...) -> ::c_int;
    pub fn execle(
        path: *const ::c_char,
        arg0: *const ::c_char,
        ...
    ) -> ::c_int;
    pub fn execlp(
        file: *const ::c_char,
        arg0: *const ::c_char,
        ...
    ) -> ::c_int;
    pub fn execv(prog: *const c_char, argv: *const *const c_char) -> ::c_int;
    pub fn execve(
        prog: *const c_char,
        argv: *const *const c_char,
        envp: *const *const c_char,
    ) -> ::c_int;
    pub fn execvp(c: *const c_char, argv: *const *const c_char) -> ::c_int;
    pub fn fork() -> pid_t;
    pub fn fpathconf(filedes: ::c_int, name: ::c_int) -> c_long;
    pub fn getcwd(buf: *mut c_char, size: ::size_t) -> *mut c_char;
    pub fn getegid() -> gid_t;
    pub fn geteuid() -> uid_t;
    pub fn getgid() -> gid_t;
    pub fn getgroups(ngroups_max: ::c_int, groups: *mut gid_t) -> ::c_int;
    #[cfg_attr(target_os = "illumos", link_name = "getloginx")]
    pub fn getlogin() -> *mut c_char;
    #[cfg_attr(
        all(target_os = "macos", target_arch = "x86"),
        link_name = "getopt$UNIX2003"
    )]
    pub fn getopt(
        argc: ::c_int,
        argv: *const *mut c_char,
        optstr: *const c_char,
    ) -> ::c_int;
    pub fn getpgid(pid: pid_t) -> pid_t;
    pub fn getpgrp() -> pid_t;
    pub fn getpid() -> pid_t;
    pub fn getppid() -> pid_t;
    pub fn getuid() -> uid_t;
    pub fn isatty(fd: ::c_int) -> ::c_int;
    pub fn link(src: *const c_char, dst: *const c_char) -> ::c_int;
    pub fn lseek(fd: ::c_int, offset: off_t, whence: ::c_int) -> off_t;
    pub fn pathconf(path: *const c_char, name: ::c_int) -> c_long;
    pub fn pipe(fds: *mut ::c_int) -> ::c_int;
    pub fn posix_memalign(
        memptr: *mut *mut ::c_void,
        align: ::size_t,
        size: ::size_t,
    ) -> ::c_int;
    #[cfg_attr(
        all(target_os = "macos", target_arch = "x86"),
        link_name = "read$UNIX2003"
    )]
    pub fn read(fd: ::c_int, buf: *mut ::c_void, count: ::size_t)
        -> ::ssize_t;
    pub fn rmdir(path: *const c_char) -> ::c_int;
    pub fn seteuid(uid: uid_t) -> ::c_int;
    pub fn setegid(gid: gid_t) -> ::c_int;
    pub fn setgid(gid: gid_t) -> ::c_int;
    pub fn setpgid(pid: pid_t, pgid: pid_t) -> ::c_int;
    pub fn setsid() -> pid_t;
    pub fn setuid(uid: uid_t) -> ::c_int;
    #[cfg_attr(
        all(target_os = "macos", target_arch = "x86"),
        link_name = "sleep$UNIX2003"
    )]
    pub fn sleep(secs: ::c_uint) -> ::c_uint;
    #[cfg_attr(
        all(target_os = "macos", target_arch = "x86"),
        link_name = "nanosleep$UNIX2003"
    )]
    #[cfg_attr(target_os = "netbsd", link_name = "__nanosleep50")]
    pub fn nanosleep(rqtp: *const timespec, rmtp: *mut timespec) -> ::c_int;
    pub fn tcgetpgrp(fd: ::c_int) -> pid_t;
    pub fn tcsetpgrp(fd: ::c_int, pgrp: ::pid_t) -> ::c_int;
    pub fn ttyname(fd: ::c_int) -> *mut c_char;
    #[cfg_attr(
        all(target_os = "macos", target_arch = "x86"),
        link_name = "ttyname_r$UNIX2003"
    )]
    #[cfg_attr(target_os = "illumos", link_name = "__posix_ttyname_r")]
    pub fn ttyname_r(
        fd: ::c_int,
        buf: *mut c_char,
        buflen: ::size_t,
    ) -> ::c_int;
    pub fn unlink(c: *const c_char) -> ::c_int;
    #[cfg_attr(
        all(target_os = "macos", target_arch = "x86"),
        link_name = "wait$UNIX2003"
    )]
    pub fn wait(status: *mut ::c_int) -> pid_t;
    #[cfg_attr(
        all(target_os = "macos", target_arch = "x86"),
        link_name = "waitpid$UNIX2003"
    )]
    pub fn waitpid(
        pid: pid_t,
        status: *mut ::c_int,
        options: ::c_int,
    ) -> pid_t;
    #[cfg_attr(