xref: /rust-libc-0.2.174/src/unix/mod.rs (revision ae81dc8d)
1 //! Definitions found commonly among almost all Unix derivatives
2 //!
3 //! More functions and definitions can be found in the more specific modules
4 //! according to the platform in question.
5 
6 use dox::Option;
7 
8 pub type pid_t = i32;
9 pub type uid_t = u32;
10 pub type gid_t = u32;
11 pub type in_addr_t = u32;
12 pub type in_port_t = u16;
13 pub type sighandler_t = ::size_t;
14 pub type cc_t = ::c_uchar;
15 
16 pub enum DIR {}
17 pub enum locale_t {}
18 
19 s! {
20     pub struct group {
21         pub gr_name: *mut ::c_char,
22         pub gr_passwd: *mut ::c_char,
23         pub gr_gid: ::gid_t,
24         pub gr_mem: *mut *mut ::c_char,
25     }
26 
27     pub struct utimbuf {
28         pub actime: time_t,
29         pub modtime: time_t,
30     }
31 
32     pub struct timeval {
33         pub tv_sec: time_t,
34         pub tv_usec: suseconds_t,
35     }
36 
37     // linux x32 compatibility
38     // See https://sourceware.org/bugzilla/show_bug.cgi?id=16437
39     pub struct timespec {
40         pub tv_sec: time_t,
41         #[cfg(all(target_arch = "x86_64", target_pointer_width = "32"))]
42         pub tv_nsec: i64,
43         #[cfg(not(all(target_arch = "x86_64", target_pointer_width = "32")))]
44         pub tv_nsec: ::c_long,
45     }
46 
47     pub struct rlimit {
48         pub rlim_cur: rlim_t,
49         pub rlim_max: rlim_t,
50     }
51 
52     pub struct rusage {
53         pub ru_utime: timeval,
54         pub ru_stime: timeval,
55         pub ru_maxrss: c_long,
56         #[cfg(all(target_arch = "x86_64", target_pointer_width = "32"))]
57         __pad1: u32,
58         pub ru_ixrss: c_long,
59         #[cfg(all(target_arch = "x86_64", target_pointer_width = "32"))]
60         __pad2: u32,
61         pub ru_idrss: c_long,
62         #[cfg(all(target_arch = "x86_64", target_pointer_width = "32"))]
63         __pad3: u32,
64         pub ru_isrss: c_long,
65         #[cfg(all(target_arch = "x86_64", target_pointer_width = "32"))]
66         __pad4: u32,
67         pub ru_minflt: c_long,
68         #[cfg(all(target_arch = "x86_64", target_pointer_width = "32"))]
69         __pad5: u32,
70         pub ru_majflt: c_long,
71         #[cfg(all(target_arch = "x86_64", target_pointer_width = "32"))]
72         __pad6: u32,
73         pub ru_nswap: c_long,
74         #[cfg(all(target_arch = "x86_64", target_pointer_width = "32"))]
75         __pad7: u32,
76         pub ru_inblock: c_long,
77         #[cfg(all(target_arch = "x86_64", target_pointer_width = "32"))]
78         __pad8: u32,
79         pub ru_oublock: c_long,
80         #[cfg(all(target_arch = "x86_64", target_pointer_width = "32"))]
81         __pad9: u32,
82         pub ru_msgsnd: c_long,
83         #[cfg(all(target_arch = "x86_64", target_pointer_width = "32"))]
84         __pad10: u32,
85         pub ru_msgrcv: c_long,
86         #[cfg(all(target_arch = "x86_64", target_pointer_width = "32"))]
87         __pad11: u32,
88         pub ru_nsignals: c_long,
89         #[cfg(all(target_arch = "x86_64", target_pointer_width = "32"))]
90         __pad12: u32,
91         pub ru_nvcsw: c_long,
92         #[cfg(all(target_arch = "x86_64", target_pointer_width = "32"))]
93         __pad13: u32,
94         pub ru_nivcsw: c_long,
95         #[cfg(all(target_arch = "x86_64", target_pointer_width = "32"))]
96         __pad14: u32,
97 
98         #[cfg(any(target_env = "musl", target_os = "emscripten"))]
99         __reserved: [c_long; 16],
100     }
101 
102     #[cfg_attr(target_os = "netbsd", repr(packed))]
103     pub struct in_addr {
104         pub s_addr: in_addr_t,
105     }
106 
107     pub struct in6_addr {
108         pub s6_addr: [u8; 16],
109         __align: [u32; 0],
110     }
111 
112     pub struct ip_mreq {
113         pub imr_multiaddr: in_addr,
114         pub imr_interface: in_addr,
115     }
116 
117     pub struct ipv6_mreq {
118         pub ipv6mr_multiaddr: in6_addr,
119         #[cfg(target_os = "android")]
120         pub ipv6mr_interface: ::c_int,
121         #[cfg(not(target_os = "android"))]
122         pub ipv6mr_interface: ::c_uint,
123     }
124 
125     pub struct hostent {
126         pub h_name: *mut ::c_char,
127         pub h_aliases: *mut *mut ::c_char,
128         pub h_addrtype: ::c_int,
129         pub h_length: ::c_int,
130         pub h_addr_list: *mut *mut ::c_char,
131     }
132 
133     pub struct iovec {
134         pub iov_base: *mut ::c_void,
135         pub iov_len: ::size_t,
136     }
137 
138     pub struct pollfd {
139         pub fd: ::c_int,
140         pub events: ::c_short,
141         pub revents: ::c_short,
142     }
143 
144     pub struct winsize {
145         pub ws_row: ::c_ushort,
146         pub ws_col: ::c_ushort,
147         pub ws_xpixel: ::c_ushort,
148         pub ws_ypixel: ::c_ushort,
149     }
150 
151     pub struct linger {
152         pub l_onoff: ::c_int,
153         pub l_linger: ::c_int,
154     }
155 
156     pub struct sigval {
157         // Actually a union of an int and a void*
158         pub sival_ptr: *mut ::c_void
159     }
160 
161     // <sys/time.h>
162     pub struct itimerval {
163         pub it_interval: ::timeval,
164         pub it_value: ::timeval,
165     }
166 
167     // <sys/times.h>
168     pub struct tms {
169         pub tms_utime: ::clock_t,
170         pub tms_stime: ::clock_t,
171         pub tms_cutime: ::clock_t,
172         pub tms_cstime: ::clock_t,
173     }
174 
175     pub struct servent {
176         pub s_name: *mut ::c_char,
177         pub s_aliases: *mut *mut ::c_char,
178         pub s_port: ::c_int,
179         pub s_proto: *mut ::c_char,
180     }
181 
182     pub struct protoent {
183         pub p_name: *mut ::c_char,
184         pub p_aliases: *mut *mut ::c_char,
185         pub p_proto: ::c_int,
186     }
187 }
188 
189 pub const SIG_DFL: sighandler_t = 0 as sighandler_t;
190 pub const SIG_IGN: sighandler_t = 1 as sighandler_t;
191 pub const SIG_ERR: sighandler_t = !0 as sighandler_t;
192 
193 pub const DT_FIFO: u8 = 1;
194 pub const DT_CHR: u8 = 2;
195 pub const DT_DIR: u8 = 4;
196 pub const DT_BLK: u8 = 6;
197 pub const DT_REG: u8 = 8;
198 pub const DT_LNK: u8 = 10;
199 pub const DT_SOCK: u8 = 12;
200 
201 pub const FD_CLOEXEC: ::c_int = 0x1;
202 
203 pub const USRQUOTA: ::c_int = 0;
204 pub const GRPQUOTA: ::c_int = 1;
205 
206 pub const SIGIOT: ::c_int = 6;
207 
208 pub const S_ISUID: ::c_int = 0x800;
209 pub const S_ISGID: ::c_int = 0x400;
210 pub const S_ISVTX: ::c_int = 0x200;
211 
212 pub const IF_NAMESIZE: ::size_t = 16;
213 
214 pub const LOG_EMERG: ::c_int = 0;
215 pub const LOG_ALERT: ::c_int = 1;
216 pub const LOG_CRIT: ::c_int = 2;
217 pub const LOG_ERR: ::c_int = 3;
218 pub const LOG_WARNING: ::c_int = 4;
219 pub const LOG_NOTICE: ::c_int = 5;
220 pub const LOG_INFO: ::c_int = 6;
221 pub const LOG_DEBUG: ::c_int = 7;
222 
223 pub const LOG_KERN: ::c_int = 0;
224 pub const LOG_USER: ::c_int = 1 << 3;
225 pub const LOG_MAIL: ::c_int = 2 << 3;
226 pub const LOG_DAEMON: ::c_int = 3 << 3;
227 pub const LOG_AUTH: ::c_int = 4 << 3;
228 pub const LOG_SYSLOG: ::c_int = 5 << 3;
229 pub const LOG_LPR: ::c_int = 6 << 3;
230 pub const LOG_NEWS: ::c_int = 7 << 3;
231 pub const LOG_UUCP: ::c_int = 8 << 3;
232 pub const LOG_LOCAL0: ::c_int = 16 << 3;
233 pub const LOG_LOCAL1: ::c_int = 17 << 3;
234 pub const LOG_LOCAL2: ::c_int = 18 << 3;
235 pub const LOG_LOCAL3: ::c_int = 19 << 3;
236 pub const LOG_LOCAL4: ::c_int = 20 << 3;
237 pub const LOG_LOCAL5: ::c_int = 21 << 3;
238 pub const LOG_LOCAL6: ::c_int = 22 << 3;
239 pub const LOG_LOCAL7: ::c_int = 23 << 3;
240 
241 pub const LOG_PID: ::c_int = 0x01;
242 pub const LOG_CONS: ::c_int = 0x02;
243 pub const LOG_ODELAY: ::c_int = 0x04;
244 pub const LOG_NDELAY: ::c_int = 0x08;
245 pub const LOG_NOWAIT: ::c_int = 0x10;
246 
247 pub const LOG_PRIMASK: ::c_int = 7;
248 pub const LOG_FACMASK: ::c_int = 0x3f8;
249 
250 pub const PRIO_PROCESS: ::c_int = 0;
251 pub const PRIO_PGRP: ::c_int = 1;
252 pub const PRIO_USER: ::c_int = 2;
253 
254 pub const PRIO_MIN: ::c_int = -20;
255 pub const PRIO_MAX: ::c_int = 20;
256 
257 pub const IPPROTO_ICMP: ::c_int = 1;
258 pub const IPPROTO_ICMPV6: ::c_int = 58;
259 pub const IPPROTO_TCP: ::c_int = 6;
260 pub const IPPROTO_UDP: ::c_int = 17;
261 pub const IPPROTO_IP: ::c_int = 0;
262 pub const IPPROTO_IPV6: ::c_int = 41;
263 
264 pub const INADDR_LOOPBACK: in_addr_t = 2130706433;
265 pub const INADDR_ANY: in_addr_t = 0;
266 pub const INADDR_BROADCAST: in_addr_t = 4294967295;
267 pub const INADDR_NONE: in_addr_t = 4294967295;
268 
269 cfg_if! {
270     if #[cfg(dox)] {
271         // on dox builds don't pull in anything
272     } else if #[cfg(target_os = "l4re")] {
273         // required libraries for L4Re are linked externally, ATM
274     } else if #[cfg(feature = "use_std")] {
275         // cargo build, don't pull in anything extra as the libstd dep
276         // already pulls in all libs.
277     } else if #[cfg(any(all(target_env = "musl", not(target_arch = "mips"))))] {
278         #[link(name = "c", kind = "static", cfg(target_feature = "crt-static"))]
279         #[link(name = "c", cfg(not(target_feature = "crt-static")))]
280         extern {}
281     } else if #[cfg(target_os = "emscripten")] {
282         #[link(name = "c")]
283         extern {}
284     } else if #[cfg(all(target_os = "netbsd", target_vendor = "rumprun"))] {
285         // Since we don't use -nodefaultlibs on Rumprun, libc is always pulled
286         // in automatically by the linker. We avoid passing it explicitly, as it
287         // causes some versions of binutils to crash with an assertion failure.
288         #[link(name = "m")]
289         extern {}
290     } else if #[cfg(any(target_os = "macos",
291                         target_os = "ios",
292                         target_os = "android",
293                         target_os = "openbsd",
294                         target_os = "bitrig"))] {
295         #[link(name = "c")]
296         #[link(name = "m")]
297         extern {}
298     } else if #[cfg(target_os = "haiku")] {
299         #[link(name = "root")]
300         #[link(name = "network")]
301         extern {}
302     } else if #[cfg(target_os = "fuchsia")] {
303         #[link(name = "c")]
304         #[link(name = "fdio")]
305         extern {}
306     } else if #[cfg(target_env = "newlib")] {
307         #[link(name = "c")]
308         #[link(name = "m")]
309         extern {}
310     } else {
311         #[link(name = "c")]
312         #[link(name = "m")]
313         #[link(name = "rt")]
314         #[link(name = "pthread")]
315         extern {}
316     }
317 }
318 
319 extern {
320     #[cfg_attr(target_os = "netbsd", link_name = "__getpwnam50")]
321     pub fn getpwnam(name: *const ::c_char) -> *mut passwd;
322     #[cfg_attr(target_os = "netbsd", link_name = "__getpwuid50")]
323     pub fn getpwuid(uid: ::uid_t) -> *mut passwd;
324 
325     pub fn fprintf(stream: *mut ::FILE,
326                    format: *const ::c_char, ...) -> ::c_int;
327     pub fn printf(format: *const ::c_char, ...) -> ::c_int;
328     pub fn snprintf(s: *mut ::c_char, n: ::size_t,
329                     format: *const ::c_char, ...) -> ::c_int;
330     pub fn sprintf(s: *mut ::c_char, format: *const ::c_char, ...) -> ::c_int;
331     pub fn fscanf(stream: *mut ::FILE, format: *const ::c_char, ...) -> ::c_int;
332     pub fn scanf(format: *const ::c_char, ...) -> ::c_int;
333     pub fn sscanf(s: *const ::c_char, format: *const ::c_char, ...) -> ::c_int;
334     pub fn getchar_unlocked() -> ::c_int;
335     pub fn putchar_unlocked(c: ::c_int) -> ::c_int;
336 
337     #[cfg_attr(target_os = "netbsd", link_name = "__socket30")]
338     pub fn socket(domain: ::c_int, ty: ::c_int, protocol: ::c_int) -> ::c_int;
339     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
340                link_name = "connect$UNIX2003")]
341     pub fn connect(socket: ::c_int, address: *const sockaddr,
342                    len: socklen_t) -> ::c_int;
343     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
344                link_name = "listen$UNIX2003")]
345     pub fn listen(socket: ::c_int, backlog: ::c_int) -> ::c_int;
346     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
347                link_name = "accept$UNIX2003")]
348     pub fn accept(socket: ::c_int, address: *mut sockaddr,
349                   address_len: *mut socklen_t) -> ::c_int;
350     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
351                link_name = "getpeername$UNIX2003")]
352     pub fn getpeername(socket: ::c_int, address: *mut sockaddr,
353                        address_len: *mut socklen_t) -> ::c_int;
354     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
355                link_name = "getsockname$UNIX2003")]
356     pub fn getsockname(socket: ::c_int, address: *mut sockaddr,
357                        address_len: *mut socklen_t) -> ::c_int;
358     pub fn setsockopt(socket: ::c_int, level: ::c_int, name: ::c_int,
359                       value: *const ::c_void,
360                       option_len: socklen_t) -> ::c_int;
361     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
362                link_name = "socketpair$UNIX2003")]
363     pub fn socketpair(domain: ::c_int, type_: ::c_int, protocol: ::c_int,
364                       socket_vector: *mut ::c_int) -> ::c_int;
365     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
366                link_name = "sendto$UNIX2003")]
367     pub fn sendto(socket: ::c_int, buf: *const ::c_void, len: ::size_t,
368                   flags: ::c_int, addr: *const sockaddr,
369                   addrlen: socklen_t) -> ::ssize_t;
370     pub fn shutdown(socket: ::c_int, how: ::c_int) -> ::c_int;
371 
372     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
373                link_name = "chmod$UNIX2003")]
374     pub fn chmod(path: *const c_char, mode: mode_t) -> ::c_int;
375     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
376                link_name = "fchmod$UNIX2003")]
377     pub fn fchmod(fd: ::c_int, mode: mode_t) -> ::c_int;
378 
379     #[cfg_attr(target_os = "macos", link_name = "fstat$INODE64")]
380     #[cfg_attr(target_os = "netbsd", link_name = "__fstat50")]
381     pub fn fstat(fildes: ::c_int, buf: *mut stat) -> ::c_int;
382 
383     pub fn mkdir(path: *const c_char, mode: mode_t) -> ::c_int;
384 
385     #[cfg_attr(target_os = "macos", link_name = "stat$INODE64")]
386     #[cfg_attr(target_os = "netbsd", link_name = "__stat50")]
387     pub fn stat(path: *const c_char, buf: *mut stat) -> ::c_int;
388 
389     pub fn pclose(stream: *mut ::FILE) -> ::c_int;
390     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
391                link_name = "fdopen$UNIX2003")]
392     pub fn fdopen(fd: ::c_int, mode: *const c_char) -> *mut ::FILE;
393     pub fn fileno(stream: *mut ::FILE) -> ::c_int;
394 
395     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
396                link_name = "open$UNIX2003")]
397     pub fn open(path: *const c_char, oflag: ::c_int, ...) -> ::c_int;
398     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
399                link_name = "creat$UNIX2003")]
400     pub fn creat(path: *const c_char, mode: mode_t) -> ::c_int;
401     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
402                link_name = "fcntl$UNIX2003")]
403     pub fn fcntl(fd: ::c_int, cmd: ::c_int, ...) -> ::c_int;
404 
405     #[cfg_attr(all(target_os = "macos", target_arch = "x86_64"),
406                link_name = "opendir$INODE64")]
407     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
408                link_name = "opendir$INODE64$UNIX2003")]
409     #[cfg_attr(target_os = "netbsd", link_name = "__opendir30")]
410     pub fn opendir(dirname: *const c_char) -> *mut ::DIR;
411     #[cfg_attr(target_os = "macos", link_name = "readdir$INODE64")]
412     #[cfg_attr(target_os = "netbsd", link_name = "__readdir30")]
413     pub fn readdir(dirp: *mut ::DIR) -> *mut ::dirent;
414     #[cfg_attr(target_os = "macos", link_name = "readdir_r$INODE64")]
415     #[cfg_attr(target_os = "netbsd", link_name = "__readdir_r30")]
416     #[cfg_attr(target_os = "solaris", link_name = "__posix_readdir_r")]
417     pub fn readdir_r(dirp: *mut ::DIR, entry: *mut ::dirent,
418                      result: *mut *mut ::dirent) -> ::c_int;
419     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
420                link_name = "closedir$UNIX2003")]
421     pub fn closedir(dirp: *mut ::DIR) -> ::c_int;
422     #[cfg_attr(all(target_os = "macos", target_arch = "x86_64"),
423                link_name = "rewinddir$INODE64")]
424     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
425                link_name = "rewinddir$INODE64$UNIX2003")]
426     pub fn rewinddir(dirp: *mut ::DIR);
427 
428     pub fn openat(dirfd: ::c_int, pathname: *const ::c_char,
429                   flags: ::c_int, ...) -> ::c_int;
430     pub fn fchmodat(dirfd: ::c_int, pathname: *const ::c_char,
431                     mode: ::mode_t, flags: ::c_int) -> ::c_int;
432     pub fn fchown(fd: ::c_int,
433                   owner: ::uid_t,
434                   group: ::gid_t) -> ::c_int;
435     pub fn fchownat(dirfd: ::c_int, pathname: *const ::c_char,
436                     owner: ::uid_t, group: ::gid_t,
437                     flags: ::c_int) -> ::c_int;
438     #[cfg_attr(target_os = "macos", link_name = "fstatat$INODE64")]
439     pub fn fstatat(dirfd: ::c_int, pathname: *const ::c_char,
440                    buf: *mut stat, flags: ::c_int) -> ::c_int;
441     pub fn linkat(olddirfd: ::c_int, oldpath: *const ::c_char,
442                   newdirfd: ::c_int, newpath: *const ::c_char,
443                   flags: ::c_int) -> ::c_int;
444     pub fn mkdirat(dirfd: ::c_int, pathname: *const ::c_char,
445                    mode: ::mode_t) -> ::c_int;
446     pub fn readlinkat(dirfd: ::c_int, pathname: *const ::c_char,
447                       buf: *mut ::c_char, bufsiz: ::size_t) -> ::ssize_t;
448     pub fn renameat(olddirfd: ::c_int, oldpath: *const ::c_char,
449                     newdirfd: ::c_int, newpath: *const ::c_char)
450                     -> ::c_int;
451     pub fn symlinkat(target: *const ::c_char, newdirfd: ::c_int,
452                      linkpath: *const ::c_char) -> ::c_int;
453     pub fn unlinkat(dirfd: ::c_int, pathname: *const ::c_char,
454                     flags: ::c_int) -> ::c_int;
455 
456     pub fn access(path: *const c_char, amode: ::c_int) -> ::c_int;
457     pub fn alarm(seconds: ::c_uint) -> ::c_uint;
458     pub fn chdir(dir: *const c_char) -> ::c_int;
459     pub fn fchdir(dirfd: ::c_int) -> ::c_int;
460     pub fn chown(path: *const c_char, uid: uid_t,
461                  gid: gid_t) -> ::c_int;
462     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
463                link_name = "lchown$UNIX2003")]
464     pub fn lchown(path: *const c_char, uid: uid_t,
465                   gid: gid_t) -> ::c_int;
466     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
467                link_name = "close$NOCANCEL$UNIX2003")]
468     #[cfg_attr(all(target_os = "macos", target_arch = "x86_64"),
469                link_name = "close$NOCANCEL")]
470     pub fn close(fd: ::c_int) -> ::c_int;
471     pub fn dup(fd: ::c_int) -> ::c_int;
472     pub fn dup2(src: ::c_int, dst: ::c_int) -> ::c_int;
473     pub fn execl(path: *const c_char,
474                  arg0: *const c_char, ...) -> ::c_int;
475     pub fn execle(path: *const ::c_char,
476                   arg0: *const ::c_char, ...) -> ::c_int;
477     pub fn execlp(file: *const ::c_char,
478                   arg0: *const ::c_char, ...) -> ::c_int;
479     pub fn execv(prog: *const c_char,
480                  argv: *const *const c_char) -> ::c_int;
481     pub fn execve(prog: *const c_char, argv: *const *const c_char,
482                   envp: *const *const c_char)
483                   -> ::c_int;
484     pub fn execvp(c: *const c_char,
485                   argv: *const *const c_char) -> ::c_int;
486     pub fn fork() -> pid_t;
487     pub fn fpathconf(filedes: ::c_int, name: ::c_int) -> c_long;
488     pub fn getcwd(buf: *mut c_char, size: ::size_t) -> *mut c_char;
489     pub fn getegid() -> gid_t;
490     pub fn geteuid() -> uid_t;
491     pub fn getgid() -> gid_t;
492     pub fn getgroups(ngroups_max: ::c_int, groups: *mut gid_t)
493                      -> ::c_int;
494     pub fn getlogin() -> *mut c_char;
495     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
496                link_name = "getopt$UNIX2003")]
497     pub fn getopt(argc: ::c_int, argv: *const *mut c_char,
498                   optstr: *const c_char) -> ::c_int;
499     pub fn getpgid(pid: pid_t) -> pid_t;
500     pub fn getpgrp() -> pid_t;
501     pub fn getpid() -> pid_t;
502     pub fn getppid() -> pid_t;
503     pub fn getuid() -> uid_t;
504     pub fn isatty(fd: ::c_int) -> ::c_int;
505     pub fn link(src: *const c_char, dst: *const c_char) -> ::c_int;
506     pub fn lseek(fd: ::c_int, offset: off_t, whence: ::c_int) -> off_t;
507     pub fn pathconf(path: *const c_char, name: ::c_int) -> c_long;
508     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
509                link_name = "pause$UNIX2003")]
510     pub fn pause() -> ::c_int;
511     pub fn pipe(fds: *mut ::c_int) -> ::c_int;
512     pub fn posix_memalign(memptr: *mut *mut ::c_void,
513                       align: ::size_t,
514                       size: ::size_t) -> ::c_int;
515     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
516                link_name = "read$UNIX2003")]
517     pub fn read(fd: ::c_int, buf: *mut ::c_void, count: ::size_t)
518                 -> ::ssize_t;
519     pub fn rmdir(path: *const c_char) -> ::c_int;
520     pub fn seteuid(uid: uid_t) -> ::c_int;
521     pub fn setgid(gid: gid_t) -> ::c_int;
522     pub fn setpgid(pid: pid_t, pgid: pid_t) -> ::c_int;
523     pub fn setsid() -> pid_t;
524     pub fn setuid(uid: uid_t) -> ::c_int;
525     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
526                link_name = "sleep$UNIX2003")]
527     pub fn sleep(secs: ::c_uint) -> ::c_uint;
528     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
529                link_name = "nanosleep$UNIX2003")]
530     #[cfg_attr(target_os = "netbsd", link_name = "__nanosleep50")]
531     pub fn nanosleep(rqtp: *const timespec,
532                      rmtp: *mut timespec) -> ::c_int;
533     pub fn tcgetpgrp(fd: ::c_int) -> pid_t;
534     pub fn tcsetpgrp(fd: ::c_int, pgrp: ::pid_t) -> ::c_int;
535     pub fn ttyname(fd: ::c_int) -> *mut c_char;
536     pub fn unlink(c: *const c_char) -> ::c_int;
537     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
538                link_name = "wait$UNIX2003")]
539     pub fn wait(status: *mut ::c_int) -> pid_t;
540     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
541                link_name = "waitpid$UNIX2003")]
542     pub fn waitpid(pid: pid_t, status: *mut ::c_int, options: ::c_int)
543                    -> pid_t;
544     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
545                link_name = "write$UNIX2003")]
546     pub fn write(fd: ::c_int, buf: *const ::c_void, count: ::size_t)
547                  -> ::ssize_t;
548     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
549                link_name = "pread$UNIX2003")]
550     pub fn pread(fd: ::c_int, buf: *mut ::c_void, count: ::size_t,
551                  offset: off_t) -> ::ssize_t;
552     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
553                link_name = "pwrite$UNIX2003")]
554     pub fn pwrite(fd: ::c_int, buf: *const ::c_void, count: ::size_t,
555                   offset: off_t) -> ::ssize_t;
556     pub fn umask(mask: mode_t) -> mode_t;
557 
558     #[cfg_attr(target_os = "netbsd", link_name = "__utime50")]
559     pub fn utime(file: *const c_char, buf: *const utimbuf) -> ::c_int;
560 
561     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
562                    link_name = "kill$UNIX2003")]
563     pub fn kill(pid: pid_t, sig: ::c_int) -> ::c_int;
564 
565     pub fn mlock(addr: *const ::c_void, len: ::size_t) -> ::c_int;
566     pub fn munlock(addr: *const ::c_void, len: ::size_t) -> ::c_int;
567     pub fn mlockall(flags: ::c_int) -> ::c_int;
568     pub fn munlockall() -> ::c_int;
569 
570     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
571                link_name = "mmap$UNIX2003")]
572     pub fn mmap(addr: *mut ::c_void,
573                 len: ::size_t,
574                 prot: ::c_int,
575                 flags: ::c_int,
576                 fd: ::c_int,
577                 offset: off_t)
578                 -> *mut ::c_void;
579     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
580                link_name = "munmap$UNIX2003")]
581     pub fn munmap(addr: *mut ::c_void, len: ::size_t) -> ::c_int;
582 
583     pub fn if_nametoindex(ifname: *const c_char) -> ::c_uint;
584     pub fn if_indextoname(ifindex: ::c_uint,
585                           ifname: *mut ::c_char) -> *mut ::c_char;
586 
587     #[cfg_attr(target_os = "macos", link_name = "lstat$INODE64")]
588     #[cfg_attr(target_os = "netbsd", link_name = "__lstat50")]
589     pub fn lstat(path: *const c_char, buf: *mut stat) -> ::c_int;
590 
591     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
592                link_name = "fsync$UNIX2003")]
593     pub fn fsync(fd: ::c_int) -> ::c_int;
594 
595     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
596                link_name = "setenv$UNIX2003")]
597     pub fn setenv(name: *const c_char, val: *const c_char,
598                   overwrite: ::c_int) -> ::c_int;
599     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
600                link_name = "unsetenv$UNIX2003")]
601     #[cfg_attr(target_os = "netbsd", link_name = "__unsetenv13")]
602     pub fn unsetenv(name: *const c_char) -> ::c_int;
603 
604     pub fn symlink(path1: *const c_char,
605                    path2: *const c_char) -> ::c_int;
606 
607     pub fn ftruncate(fd: ::c_int, length: off_t) -> ::c_int;
608 
609     pub fn signal(signum: ::c_int, handler: sighandler_t) -> sighandler_t;
610 
611     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
612                link_name = "getrlimit$UNIX2003")]
613     pub fn getrlimit(resource: ::c_int, rlim: *mut rlimit) -> ::c_int;
614     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
615                link_name = "setrlimit$UNIX2003")]
616     pub fn setrlimit(resource: ::c_int, rlim: *const rlimit) -> ::c_int;
617     #[cfg_attr(target_os = "netbsd", link_name = "__getrusage50")]
618     pub fn getrusage(resource: ::c_int, usage: *mut rusage) -> ::c_int;
619 
620     #[cfg_attr(any(target_os = "macos", target_os = "ios"),
621                link_name = "realpath$DARWIN_EXTSN")]
622     pub fn realpath(pathname: *const ::c_char, resolved: *mut ::c_char)
623                     -> *mut ::c_char;
624 
625     pub fn flock(fd: ::c_int, operation: ::c_int) -> ::c_int;
626 
627     #[cfg_attr(target_os = "netbsd", link_name = "__gettimeofday50")]
628     pub fn gettimeofday(tp: *mut ::timeval,
629                         tz: *mut ::c_void) -> ::c_int;
630     #[cfg_attr(target_os = "netbsd", link_name = "__times13")]
631     pub fn times(buf: *mut ::tms) -> ::clock_t;
632 
633     pub fn pthread_self() -> ::pthread_t;
634     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
635                link_name = "pthread_join$UNIX2003")]
636     pub fn pthread_join(native: ::pthread_t,
637                         value: *mut *mut ::c_void) -> ::c_int;
638     pub fn pthread_exit(value: *mut ::c_void);
639     pub fn pthread_attr_init(attr: *mut ::pthread_attr_t) -> ::c_int;
640     pub fn pthread_attr_destroy(attr: *mut ::pthread_attr_t) -> ::c_int;
641     pub fn pthread_attr_setstacksize(attr: *mut ::pthread_attr_t,
642                                      stack_size: ::size_t) -> ::c_int;
643     pub fn pthread_attr_setdetachstate(attr: *mut ::pthread_attr_t,
644                                        state: ::c_int) -> ::c_int;
645     pub fn pthread_detach(thread: ::pthread_t) -> ::c_int;
646     #[cfg_attr(target_os = "netbsd", link_name = "__libc_thr_yield")]
647     pub fn sched_yield() -> ::c_int;
648     pub fn pthread_key_create(key: *mut pthread_key_t,
649                               dtor: Option<unsafe extern fn(*mut ::c_void)>)
650                               -> ::c_int;
651     pub fn pthread_key_delete(key: pthread_key_t) -> ::c_int;
652     pub fn pthread_getspecific(key: pthread_key_t) -> *mut ::c_void;
653     pub fn pthread_setspecific(key: pthread_key_t, value: *const ::c_void)
654                                -> ::c_int;
655     pub fn pthread_mutex_init(lock: *mut pthread_mutex_t,
656                               attr: *const pthread_mutexattr_t) -> ::c_int;
657     pub fn pthread_mutex_destroy(lock: *mut pthread_mutex_t) -> ::c_int;
658     pub fn pthread_mutex_lock(lock: *mut pthread_mutex_t) -> ::c_int;
659     pub fn pthread_mutex_trylock(lock: *mut pthread_mutex_t) -> ::c_int;
660     pub fn pthread_mutex_unlock(lock: *mut pthread_mutex_t) -> ::c_int;
661 
662     pub fn pthread_mutexattr_init(attr: *mut pthread_mutexattr_t) -> ::c_int;
663     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
664                link_name = "pthread_mutexattr_destroy$UNIX2003")]
665     pub fn pthread_mutexattr_destroy(attr: *mut pthread_mutexattr_t) -> ::c_int;
666     pub fn pthread_mutexattr_settype(attr: *mut pthread_mutexattr_t,
667                                      _type: ::c_int) -> ::c_int;
668 
669     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
670                link_name = "pthread_cond_init$UNIX2003")]
671     pub fn pthread_cond_init(cond: *mut pthread_cond_t,
672                              attr: *const pthread_condattr_t) -> ::c_int;
673     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
674                link_name = "pthread_cond_wait$UNIX2003")]
675     pub fn pthread_cond_wait(cond: *mut pthread_cond_t,
676                              lock: *mut pthread_mutex_t) -> ::c_int;
677     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
678                link_name = "pthread_cond_timedwait$UNIX2003")]
679     pub fn pthread_cond_timedwait(cond: *mut pthread_cond_t,
680                               lock: *mut pthread_mutex_t,
681                               abstime: *const ::timespec) -> ::c_int;
682     pub fn pthread_cond_signal(cond: *mut pthread_cond_t) -> ::c_int;
683     pub fn pthread_cond_broadcast(cond: *mut pthread_cond_t) -> ::c_int;
684     pub fn pthread_cond_destroy(cond: *mut pthread_cond_t) -> ::c_int;
685     pub fn pthread_condattr_init(attr: *mut pthread_condattr_t) -> ::c_int;
686     pub fn pthread_condattr_destroy(attr: *mut pthread_condattr_t) -> ::c_int;
687     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
688                link_name = "pthread_rwlock_init$UNIX2003")]
689     pub fn pthread_rwlock_init(lock: *mut pthread_rwlock_t,
690                                attr: *const pthread_rwlockattr_t) -> ::c_int;
691     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
692                link_name = "pthread_rwlock_destroy$UNIX2003")]
693     pub fn pthread_rwlock_destroy(lock: *mut pthread_rwlock_t) -> ::c_int;
694     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
695                link_name = "pthread_rwlock_rdlock$UNIX2003")]
696     pub fn pthread_rwlock_rdlock(lock: *mut pthread_rwlock_t) -> ::c_int;
697     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
698                link_name = "pthread_rwlock_tryrdlock$UNIX2003")]
699     pub fn pthread_rwlock_tryrdlock(lock: *mut pthread_rwlock_t) -> ::c_int;
700     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
701                link_name = "pthread_rwlock_wrlock$UNIX2003")]
702     pub fn pthread_rwlock_wrlock(lock: *mut pthread_rwlock_t) -> ::c_int;
703     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
704                link_name = "pthread_rwlock_trywrlock$UNIX2003")]
705     pub fn pthread_rwlock_trywrlock(lock: *mut pthread_rwlock_t) -> ::c_int;
706     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
707                link_name = "pthread_rwlock_unlock$UNIX2003")]
708     pub fn pthread_rwlock_unlock(lock: *mut pthread_rwlock_t) -> ::c_int;
709     pub fn pthread_rwlockattr_init(attr: *mut pthread_rwlockattr_t) -> ::c_int;
710     pub fn pthread_rwlockattr_destroy(attr: *mut pthread_rwlockattr_t)
711                                       -> ::c_int;
712     #[cfg_attr(all(target_os = "linux", not(target_env = "musl")),
713                link_name = "__xpg_strerror_r")]
714     pub fn strerror_r(errnum: ::c_int, buf: *mut c_char,
715                       buflen: ::size_t) -> ::c_int;
716 
717     pub fn getsockopt(sockfd: ::c_int,
718                       level: ::c_int,
719                       optname: ::c_int,
720                       optval: *mut ::c_void,
721                       optlen: *mut ::socklen_t) -> ::c_int;
722     pub fn raise(signum: ::c_int) -> ::c_int;
723     #[cfg_attr(target_os = "netbsd", link_name = "__sigaction14")]
724     pub fn sigaction(signum: ::c_int,
725                      act: *const sigaction,
726                      oldact: *mut sigaction) -> ::c_int;
727 
728     #[cfg_attr(target_os = "netbsd", link_name = "__utimes50")]
729     pub fn utimes(filename: *const ::c_char,
730                   times: *const ::timeval) -> ::c_int;
731     pub fn dlopen(filename: *const ::c_char,
732                   flag: ::c_int) -> *mut ::c_void;
733     pub fn dlerror() -> *mut ::c_char;
734     pub fn dlsym(handle: *mut ::c_void,
735                  symbol: *const ::c_char) -> *mut ::c_void;
736     pub fn dlclose(handle: *mut ::c_void) -> ::c_int;
737     pub fn dladdr(addr: *const ::c_void, info: *mut Dl_info) -> ::c_int;
738 
739     pub fn getaddrinfo(node: *const c_char,
740                        service: *const c_char,
741                        hints: *const addrinfo,
742                        res: *mut *mut addrinfo) -> ::c_int;
743     pub fn freeaddrinfo(res: *mut addrinfo);
744     pub fn gai_strerror(errcode: ::c_int) -> *const ::c_char;
745     #[cfg_attr(any(
746                    all(target_os = "linux", not(target_env = "musl")),
747                    target_os = "freebsd",
748                    target_os = "dragonfly",
749                    target_os = "haiku"),
750                link_name = "__res_init")]
751     #[cfg_attr(any(target_os = "macos", target_os = "ios"),
752                link_name = "res_9_init")]
753     pub fn res_init() -> ::c_int;
754 
755     #[cfg_attr(target_os = "netbsd", link_name = "__gmtime_r50")]
756     pub fn gmtime_r(time_p: *const time_t, result: *mut tm) -> *mut tm;
757     #[cfg_attr(target_os = "netbsd", link_name = "__localtime_r50")]
758     pub fn localtime_r(time_p: *const time_t, result: *mut tm) -> *mut tm;
759     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
760                link_name = "mktime$UNIX2003")]
761     #[cfg_attr(target_os = "netbsd", link_name = "__mktime50")]
762     pub fn mktime(tm: *mut tm) -> time_t;
763     #[cfg_attr(target_os = "netbsd", link_name = "__time50")]
764     pub fn time(time: *mut time_t) -> time_t;
765     #[cfg_attr(target_os = "netbsd", link_name = "__gmtime50")]
766     pub fn gmtime(time_p: *const time_t) -> *mut tm;
767     #[cfg_attr(target_os = "netbsd", link_name = "__locatime50")]
768     pub fn localtime(time_p: *const time_t) -> *mut tm;
769 
770     #[cfg_attr(target_os = "netbsd", link_name = "__mknod50")]
771     pub fn mknod(pathname: *const ::c_char, mode: ::mode_t,
772                  dev: ::dev_t) -> ::c_int;
773     pub fn uname(buf: *mut ::utsname) -> ::c_int;
774     pub fn gethostname(name: *mut ::c_char, len: ::size_t) -> ::c_int;
775     pub fn getservbyname(name: *const ::c_char,
776                          proto: *const ::c_char) -> *mut servent;
777     pub fn getprotobyname(name: *const ::c_char) -> *mut protoent;
778     pub fn getprotobynumber(proto: ::c_int) -> *mut protoent;
779     pub fn chroot(name: *const ::c_char) -> ::c_int;
780     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
781                link_name = "usleep$UNIX2003")]
782     pub fn usleep(secs: ::c_uint) -> ::c_int;
783     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
784                link_name = "send$UNIX2003")]
785     pub fn send(socket: ::c_int, buf: *const ::c_void, len: ::size_t,
786                 flags: ::c_int) -> ::ssize_t;
787     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
788                link_name = "recv$UNIX2003")]
789     pub fn recv(socket: ::c_int, buf: *mut ::c_void, len: ::size_t,
790                 flags: ::c_int) -> ::ssize_t;
791     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
792                link_name = "putenv$UNIX2003")]
793     #[cfg_attr(target_os = "netbsd", link_name = "__putenv50")]
794     pub fn putenv(string: *mut c_char) -> ::c_int;
795     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
796                link_name = "poll$UNIX2003")]
797     pub fn poll(fds: *mut pollfd, nfds: nfds_t, timeout: ::c_int) -> ::c_int;
798     #[cfg_attr(all(target_os = "macos", target_arch = "x86_64"),
799                link_name = "select$1050")]
800     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
801                link_name = "select$UNIX2003")]
802     #[cfg_attr(target_os = "netbsd", link_name = "__select50")]
803     pub fn select(nfds: ::c_int,
804                   readfs: *mut fd_set,
805                   writefds: *mut fd_set,
806                   errorfds: *mut fd_set,
807                   timeout: *mut timeval) -> ::c_int;
808     #[cfg_attr(target_os = "netbsd", link_name = "__setlocale50")]
809     pub fn setlocale(category: ::c_int,
810                      locale: *const ::c_char) -> *mut ::c_char;
811     pub fn localeconv() -> *mut lconv;
812 
813     pub fn sem_destroy(sem: *mut sem_t) -> ::c_int;
814     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
815                link_name = "sem_wait$UNIX2003")]
816     pub fn sem_wait(sem: *mut sem_t) -> ::c_int;
817     pub fn sem_trywait(sem: *mut sem_t) -> ::c_int;
818     pub fn sem_post(sem: *mut sem_t) -> ::c_int;
819     pub fn sem_init(sem: *mut sem_t,
820                     pshared: ::c_int,
821                     value: ::c_uint)
822                     -> ::c_int;
823     pub fn statvfs(path: *const c_char, buf: *mut statvfs) -> ::c_int;
824     pub fn fstatvfs(fd: ::c_int, buf: *mut statvfs) -> ::c_int;
825 
826     pub fn readlink(path: *const c_char,
827                     buf: *mut c_char,
828                     bufsz: ::size_t)
829                     -> ::ssize_t;
830 
831     #[cfg_attr(target_os = "netbsd", link_name = "__sigemptyset14")]
832     pub fn sigemptyset(set: *mut sigset_t) -> ::c_int;
833     #[cfg_attr(target_os = "netbsd", link_name = "__sigaddset14")]
834     pub fn sigaddset(set: *mut sigset_t, signum: ::c_int) -> ::c_int;
835     #[cfg_attr(target_os = "netbsd", link_name = "__sigfillset14")]
836     pub fn sigfillset(set: *mut sigset_t) -> ::c_int;
837     #[cfg_attr(target_os = "netbsd", link_name = "__sigdelset14")]
838     pub fn sigdelset(set: *mut sigset_t, signum: ::c_int) -> ::c_int;
839     #[cfg_attr(target_os = "netbsd", link_name = "__sigismember14")]
840     pub fn sigismember(set: *const sigset_t, signum: ::c_int) -> ::c_int;
841 
842     #[cfg_attr(target_os = "netbsd", link_name = "__sigprocmask14")]
843     pub fn sigprocmask(how: ::c_int,
844                        set: *const sigset_t,
845                        oldset: *mut sigset_t)
846                        -> ::c_int;
847     #[cfg_attr(target_os = "netbsd", link_name = "__sigpending14")]
848     pub fn sigpending(set: *mut sigset_t) -> ::c_int;
849 
850     #[cfg_attr(target_os = "netbsd", link_name = "__timegm50")]
851     pub fn timegm(tm: *mut ::tm) -> time_t;
852 
853     pub fn getsid(pid: pid_t) -> pid_t;
854 
855     pub fn sysconf(name: ::c_int) -> ::c_long;
856 
857     pub fn mkfifo(path: *const c_char, mode: mode_t) -> ::c_int;
858 
859     #[cfg_attr(all(target_os = "macos", target_arch = "x86_64"),
860                link_name = "pselect$1050")]
861     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
862                link_name = "pselect$UNIX2003")]
863     #[cfg_attr(target_os = "netbsd", link_name = "__pselect50")]
864     pub fn pselect(nfds: ::c_int,
865                    readfs: *mut fd_set,
866                    writefds: *mut fd_set,
867                    errorfds: *mut fd_set,
868                    timeout: *const timespec,
869                    sigmask: *const sigset_t) -> ::c_int;
870     pub fn fseeko(stream: *mut ::FILE,
871                   offset: ::off_t,
872                   whence: ::c_int) -> ::c_int;
873     pub fn ftello(stream: *mut ::FILE) -> ::off_t;
874     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
875                link_name = "tcdrain$UNIX2003")]
876     pub fn tcdrain(fd: ::c_int) -> ::c_int;
877     pub fn cfgetispeed(termios: *const ::termios) -> ::speed_t;
878     pub fn cfgetospeed(termios: *const ::termios) -> ::speed_t;
879     pub fn cfmakeraw(termios: *mut ::termios);
880     pub fn cfsetispeed(termios: *mut ::termios, speed: ::speed_t) -> ::c_int;
881     pub fn cfsetospeed(termios: *mut ::termios, speed: ::speed_t) -> ::c_int;
882     pub fn cfsetspeed(termios: *mut ::termios, speed: ::speed_t) -> ::c_int;
883     pub fn tcgetattr(fd: ::c_int, termios: *mut ::termios) -> ::c_int;
884     pub fn tcsetattr(fd: ::c_int,
885                      optional_actions: ::c_int,
886                      termios: *const ::termios) -> ::c_int;
887     pub fn tcflow(fd: ::c_int, action: ::c_int) -> ::c_int;
888     pub fn tcflush(fd: ::c_int, action: ::c_int) -> ::c_int;
889     pub fn tcgetsid(fd: ::c_int) -> ::pid_t;
890     pub fn tcsendbreak(fd: ::c_int, duration: ::c_int) -> ::c_int;
891     pub fn mkstemp(template: *mut ::c_char) -> ::c_int;
892     pub fn mkdtemp(template: *mut ::c_char) -> *mut ::c_char;
893 
894     pub fn tmpnam(ptr: *mut ::c_char) -> *mut ::c_char;
895 
896     pub fn openlog(ident: *const ::c_char, logopt: ::c_int, facility: ::c_int);
897     pub fn closelog();
898     pub fn setlogmask(maskpri: ::c_int) -> ::c_int;
899     pub fn syslog(priority: ::c_int, message: *const ::c_char, ...);
900     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
901                link_name = "nice$UNIX2003")]
902     pub fn nice(incr: ::c_int) -> ::c_int;
903 
904     pub fn grantpt(fd: ::c_int) -> ::c_int;
905     pub fn posix_openpt(flags: ::c_int) -> ::c_int;
906     pub fn ptsname(fd: ::c_int) -> *mut ::c_char;
907     pub fn unlockpt(fd: ::c_int) -> ::c_int;
908 }
909 
910 cfg_if! {
911     if #[cfg(target_env = "uclibc")] {
912         mod uclibc;
913         pub use self::uclibc::*;
914     } else if #[cfg(target_env = "newlib")] {
915         mod newlib;
916         pub use self::newlib::*;
917     } else if #[cfg(any(target_os = "linux",
918                         target_os = "android",
919                         target_os = "emscripten",
920                         target_os = "fuchsia"))] {
921         mod notbsd;
922         pub use self::notbsd::*;
923     } else if #[cfg(any(target_os = "macos",
924                         target_os = "ios",
925                         target_os = "freebsd",
926                         target_os = "dragonfly",
927                         target_os = "openbsd",
928                         target_os = "netbsd",
929                         target_os = "bitrig"))] {
930         mod bsd;
931         pub use self::bsd::*;
932     } else if #[cfg(target_os = "solaris")] {
933         mod solaris;
934         pub use self::solaris::*;
935     } else if #[cfg(target_os = "haiku")] {
936         mod haiku;
937         pub use self::haiku::*;
938     } else {
939         // Unknown target_os
940     }
941 }
942