xref: /rust-libc-0.2.174/src/unix/mod.rs (revision a097ff6d)
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     pub struct timespec {
38         pub tv_sec: time_t,
39         pub tv_nsec: c_long,
40     }
41 
42     pub struct rlimit {
43         pub rlim_cur: rlim_t,
44         pub rlim_max: rlim_t,
45     }
46 
47     pub struct rusage {
48         pub ru_utime: timeval,
49         pub ru_stime: timeval,
50         pub ru_maxrss: c_long,
51         pub ru_ixrss: c_long,
52         pub ru_idrss: c_long,
53         pub ru_isrss: c_long,
54         pub ru_minflt: c_long,
55         pub ru_majflt: c_long,
56         pub ru_nswap: c_long,
57         pub ru_inblock: c_long,
58         pub ru_oublock: c_long,
59         pub ru_msgsnd: c_long,
60         pub ru_msgrcv: c_long,
61         pub ru_nsignals: c_long,
62         pub ru_nvcsw: c_long,
63         pub ru_nivcsw: c_long,
64 
65         #[cfg(any(target_env = "musl"))]
66         __reserved: [c_long; 16],
67     }
68 
69     #[cfg_attr(target_os = "netbsd", repr(packed))]
70     pub struct in_addr {
71         pub s_addr: in_addr_t,
72     }
73 
74     pub struct in6_addr {
75         pub s6_addr: [u8; 16],
76         __align: [u32; 0],
77     }
78 
79     pub struct ip_mreq {
80         pub imr_multiaddr: in_addr,
81         pub imr_interface: in_addr,
82     }
83 
84     pub struct ipv6_mreq {
85         pub ipv6mr_multiaddr: in6_addr,
86         #[cfg(target_os = "android")]
87         pub ipv6mr_interface: ::c_int,
88         #[cfg(not(target_os = "android"))]
89         pub ipv6mr_interface: ::c_uint,
90     }
91 
92     pub struct hostent {
93         pub h_name: *mut ::c_char,
94         pub h_aliases: *mut *mut ::c_char,
95         pub h_addrtype: ::c_int,
96         pub h_length: ::c_int,
97         pub h_addr_list: *mut *mut ::c_char,
98     }
99 
100     pub struct iovec {
101         pub iov_base: *mut ::c_void,
102         pub iov_len: ::size_t,
103     }
104 
105     pub struct pollfd {
106         pub fd: ::c_int,
107         pub events: ::c_short,
108         pub revents: ::c_short,
109     }
110 
111     pub struct winsize {
112         pub ws_row: ::c_ushort,
113         pub ws_col: ::c_ushort,
114         pub ws_xpixel: ::c_ushort,
115         pub ws_ypixel: ::c_ushort,
116     }
117 
118     pub struct linger {
119         pub l_onoff: ::c_int,
120         pub l_linger: ::c_int,
121     }
122 }
123 
124 pub const SIG_DFL: sighandler_t = 0 as sighandler_t;
125 pub const SIG_IGN: sighandler_t = 1 as sighandler_t;
126 pub const SIG_ERR: sighandler_t = !0 as sighandler_t;
127 
128 pub const DT_FIFO: u8 = 1;
129 pub const DT_CHR: u8 = 2;
130 pub const DT_DIR: u8 = 4;
131 pub const DT_BLK: u8 = 6;
132 pub const DT_REG: u8 = 8;
133 pub const DT_LNK: u8 = 10;
134 pub const DT_SOCK: u8 = 12;
135 
136 pub const FD_CLOEXEC: ::c_int = 0x1;
137 
138 pub const USRQUOTA: ::c_int = 0;
139 pub const GRPQUOTA: ::c_int = 1;
140 
141 pub const SIGIOT: ::c_int = 6;
142 
143 pub const S_ISUID: ::c_int = 0x800;
144 pub const S_ISGID: ::c_int = 0x400;
145 pub const S_ISVTX: ::c_int = 0x200;
146 
147 pub const POLLIN: ::c_short = 0x1;
148 pub const POLLPRI: ::c_short = 0x2;
149 pub const POLLOUT: ::c_short = 0x4;
150 pub const POLLERR: ::c_short = 0x8;
151 pub const POLLHUP: ::c_short = 0x10;
152 pub const POLLNVAL: ::c_short = 0x20;
153 
154 pub const IF_NAMESIZE: ::size_t = 16;
155 
156 pub const RTLD_LAZY: ::c_int = 0x1;
157 
158 pub const LOG_EMERG: ::c_int = 0;
159 pub const LOG_ALERT: ::c_int = 1;
160 pub const LOG_CRIT: ::c_int = 2;
161 pub const LOG_ERR: ::c_int = 3;
162 pub const LOG_WARNING: ::c_int = 4;
163 pub const LOG_NOTICE: ::c_int = 5;
164 pub const LOG_INFO: ::c_int = 6;
165 pub const LOG_DEBUG: ::c_int = 7;
166 
167 pub const LOG_KERN: ::c_int = 0;
168 pub const LOG_USER: ::c_int = 1 << 3;
169 pub const LOG_MAIL: ::c_int = 2 << 3;
170 pub const LOG_DAEMON: ::c_int = 3 << 3;
171 pub const LOG_AUTH: ::c_int = 4 << 3;
172 pub const LOG_SYSLOG: ::c_int = 5 << 3;
173 pub const LOG_LPR: ::c_int = 6 << 3;
174 pub const LOG_NEWS: ::c_int = 7 << 3;
175 pub const LOG_UUCP: ::c_int = 8 << 3;
176 pub const LOG_LOCAL0: ::c_int = 16 << 3;
177 pub const LOG_LOCAL1: ::c_int = 17 << 3;
178 pub const LOG_LOCAL2: ::c_int = 18 << 3;
179 pub const LOG_LOCAL3: ::c_int = 19 << 3;
180 pub const LOG_LOCAL4: ::c_int = 20 << 3;
181 pub const LOG_LOCAL5: ::c_int = 21 << 3;
182 pub const LOG_LOCAL6: ::c_int = 22 << 3;
183 pub const LOG_LOCAL7: ::c_int = 23 << 3;
184 
185 pub const LOG_PID: ::c_int = 0x01;
186 pub const LOG_CONS: ::c_int = 0x02;
187 pub const LOG_ODELAY: ::c_int = 0x04;
188 pub const LOG_NDELAY: ::c_int = 0x08;
189 pub const LOG_NOWAIT: ::c_int = 0x10;
190 
191 pub const LOG_PRIMASK: ::c_int = 7;
192 pub const LOG_FACMASK: ::c_int = 0x3f8;
193 
194 pub const PRIO_PROCESS: ::c_int = 0;
195 pub const PRIO_PGRP: ::c_int = 1;
196 pub const PRIO_USER: ::c_int = 2;
197 
198 pub const PRIO_MIN: ::c_int = -20;
199 pub const PRIO_MAX: ::c_int = 20;
200 
201 cfg_if! {
202     if #[cfg(dox)] {
203         // on dox builds don't pull in anything
204     } else if #[cfg(all(not(stdbuild), feature = "use_std"))] {
205         // cargo build, don't pull in anything extra as the libstd  dep
206         // already pulls in all libs.
207     } else if #[cfg(any(all(target_env = "musl", not(target_arch = "mips"))))] {
208         #[link(name = "c", kind = "static")]
209         extern {}
210     } else if #[cfg(target_os = "emscripten")] {
211         #[link(name = "c")]
212         extern {}
213     } else if #[cfg(all(target_os = "netbsd", target_vendor = "rumprun"))] {
214         // Since we don't use -nodefaultlibs on Rumprun, libc is always pulled
215         // in automatically by the linker. We avoid passing it explicitly, as it
216         // causes some versions of binutils to crash with an assertion failure.
217         #[link(name = "m")]
218         extern {}
219     } else if #[cfg(any(target_os = "macos",
220                         target_os = "ios",
221                         target_os = "android",
222                         target_os = "openbsd",
223                         target_os = "bitrig"))] {
224         #[link(name = "c")]
225         #[link(name = "m")]
226         extern {}
227     } else {
228         #[link(name = "c")]
229         #[link(name = "m")]
230         #[link(name = "rt")]
231         extern {}
232     }
233 }
234 
235 extern {
236     pub fn getgrnam(name: *const ::c_char) -> *mut group;
237     pub fn getgrgid(gid: ::gid_t) -> *mut group;
238 
239     pub fn endpwent();
240     #[cfg_attr(target_os = "netbsd", link_name = "__getpwnam50")]
241     pub fn getpwnam(name: *const ::c_char) -> *mut passwd;
242     #[cfg_attr(target_os = "netbsd", link_name = "__getpwuid50")]
243     pub fn getpwuid(uid: ::uid_t) -> *mut passwd;
244 
245     pub fn fprintf(stream: *mut ::FILE,
246                    format: *const ::c_char, ...) -> ::c_int;
247     pub fn printf(format: *const ::c_char, ...) -> ::c_int;
248     pub fn snprintf(s: *mut ::c_char, n: ::size_t,
249                     format: *const ::c_char, ...) -> ::c_int;
250     pub fn sprintf(s: *mut ::c_char, format: *const ::c_char, ...) -> ::c_int;
251     pub fn fscanf(stream: *mut ::FILE, format: *const ::c_char, ...) -> ::c_int;
252     pub fn scanf(format: *const ::c_char, ...) -> ::c_int;
253     pub fn sscanf(s: *const ::c_char, format: *const ::c_char, ...) -> ::c_int;
254 
255     #[cfg_attr(target_os = "netbsd", link_name = "__socket30")]
256     pub fn socket(domain: ::c_int, ty: ::c_int, protocol: ::c_int) -> ::c_int;
257     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
258                link_name = "connect$UNIX2003")]
259     pub fn connect(socket: ::c_int, address: *const sockaddr,
260                    len: socklen_t) -> ::c_int;
261     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
262                link_name = "bind$UNIX2003")]
263     pub fn bind(socket: ::c_int, address: *const sockaddr,
264                 address_len: socklen_t) -> ::c_int;
265     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
266                link_name = "listen$UNIX2003")]
267     pub fn listen(socket: ::c_int, backlog: ::c_int) -> ::c_int;
268     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
269                link_name = "accept$UNIX2003")]
270     pub fn accept(socket: ::c_int, address: *mut sockaddr,
271                   address_len: *mut socklen_t) -> ::c_int;
272     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
273                link_name = "getpeername$UNIX2003")]
274     pub fn getpeername(socket: ::c_int, address: *mut sockaddr,
275                        address_len: *mut socklen_t) -> ::c_int;
276     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
277                link_name = "getsockname$UNIX2003")]
278     pub fn getsockname(socket: ::c_int, address: *mut sockaddr,
279                        address_len: *mut socklen_t) -> ::c_int;
280     pub fn setsockopt(socket: ::c_int, level: ::c_int, name: ::c_int,
281                       value: *const ::c_void,
282                       option_len: socklen_t) -> ::c_int;
283     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
284                link_name = "socketpair$UNIX2003")]
285     pub fn socketpair(domain: ::c_int, type_: ::c_int, protocol: ::c_int,
286                       socket_vector: *mut ::c_int) -> ::c_int;
287     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
288                link_name = "sendto$UNIX2003")]
289     pub fn sendto(socket: ::c_int, buf: *const ::c_void, len: ::size_t,
290                   flags: ::c_int, addr: *const sockaddr,
291                   addrlen: socklen_t) -> ::ssize_t;
292     pub fn shutdown(socket: ::c_int, how: ::c_int) -> ::c_int;
293 
294     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
295                link_name = "chmod$UNIX2003")]
296     pub fn chmod(path: *const c_char, mode: mode_t) -> ::c_int;
297     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
298                link_name = "fchmod$UNIX2003")]
299     pub fn fchmod(fd: ::c_int, mode: mode_t) -> ::c_int;
300 
301     #[cfg_attr(target_os = "macos", link_name = "fstat$INODE64")]
302     #[cfg_attr(target_os = "netbsd", link_name = "__fstat50")]
303     pub fn fstat(fildes: ::c_int, buf: *mut stat) -> ::c_int;
304 
305     pub fn mkdir(path: *const c_char, mode: mode_t) -> ::c_int;
306 
307     #[cfg_attr(target_os = "macos", link_name = "stat$INODE64")]
308     #[cfg_attr(target_os = "netbsd", link_name = "__stat50")]
309     pub fn stat(path: *const c_char, buf: *mut stat) -> ::c_int;
310 
311     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
312                link_name = "popen$UNIX2003")]
313     pub fn popen(command: *const c_char,
314                  mode: *const c_char) -> *mut ::FILE;
315     pub fn pclose(stream: *mut ::FILE) -> ::c_int;
316     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
317                link_name = "fdopen$UNIX2003")]
318     pub fn fdopen(fd: ::c_int, mode: *const c_char) -> *mut ::FILE;
319     pub fn fileno(stream: *mut ::FILE) -> ::c_int;
320 
321     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
322                link_name = "open$UNIX2003")]
323     pub fn open(path: *const c_char, oflag: ::c_int, ...) -> ::c_int;
324     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
325                link_name = "creat$UNIX2003")]
326     pub fn creat(path: *const c_char, mode: mode_t) -> ::c_int;
327     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
328                link_name = "fcntl$UNIX2003")]
329     pub fn fcntl(fd: ::c_int, cmd: ::c_int, ...) -> ::c_int;
330 
331     #[cfg_attr(all(target_os = "macos", target_arch = "x86_64"),
332                link_name = "opendir$INODE64")]
333     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
334                link_name = "opendir$INODE64$UNIX2003")]
335     #[cfg_attr(target_os = "netbsd", link_name = "__opendir30")]
336     pub fn opendir(dirname: *const c_char) -> *mut ::DIR;
337     #[cfg_attr(target_os = "macos", link_name = "readdir_r$INODE64")]
338     #[cfg_attr(target_os = "netbsd", link_name = "__readdir_r30")]
339     pub fn readdir_r(dirp: *mut ::DIR, entry: *mut ::dirent,
340                      result: *mut *mut ::dirent) -> ::c_int;
341     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
342                link_name = "closedir$UNIX2003")]
343     pub fn closedir(dirp: *mut ::DIR) -> ::c_int;
344     #[cfg_attr(all(target_os = "macos", target_arch = "x86_64"),
345                link_name = "rewinddir$INODE64")]
346     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
347                link_name = "rewinddir$INODE64$UNIX2003")]
348     pub fn rewinddir(dirp: *mut ::DIR);
349 
350     pub fn access(path: *const c_char, amode: ::c_int) -> ::c_int;
351     pub fn alarm(seconds: ::c_uint) -> ::c_uint;
352     pub fn chdir(dir: *const c_char) -> ::c_int;
353     pub fn chown(path: *const c_char, uid: uid_t,
354                  gid: gid_t) -> ::c_int;
355     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
356                link_name = "lchown$UNIX2003")]
357     pub fn lchown(path: *const c_char, uid: uid_t,
358                   gid: gid_t) -> ::c_int;
359     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
360                link_name = "close$UNIX2003")]
361     pub fn close(fd: ::c_int) -> ::c_int;
362     pub fn dup(fd: ::c_int) -> ::c_int;
363     pub fn dup2(src: ::c_int, dst: ::c_int) -> ::c_int;
364     pub fn execv(prog: *const c_char,
365                  argv: *const *const c_char) -> ::c_int;
366     pub fn execve(prog: *const c_char, argv: *const *const c_char,
367                   envp: *const *const c_char)
368                   -> ::c_int;
369     pub fn execvp(c: *const c_char,
370                   argv: *const *const c_char) -> ::c_int;
371     pub fn fork() -> pid_t;
372     pub fn fpathconf(filedes: ::c_int, name: ::c_int) -> c_long;
373     pub fn getcwd(buf: *mut c_char, size: ::size_t) -> *mut c_char;
374     pub fn getegid() -> gid_t;
375     pub fn geteuid() -> uid_t;
376     pub fn getgid() -> gid_t;
377     pub fn getgroups(ngroups_max: ::c_int, groups: *mut gid_t)
378                      -> ::c_int;
379     pub fn getlogin() -> *mut c_char;
380     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
381                link_name = "getopt$UNIX2003")]
382     pub fn getopt(argc: ::c_int, argv: *const *mut c_char,
383                   optstr: *const c_char) -> ::c_int;
384     pub fn getpgid(pid: pid_t) -> pid_t;
385     pub fn getpgrp() -> pid_t;
386     pub fn getpid() -> pid_t;
387     pub fn getppid() -> pid_t;
388     pub fn getuid() -> uid_t;
389     pub fn isatty(fd: ::c_int) -> ::c_int;
390     pub fn link(src: *const c_char, dst: *const c_char) -> ::c_int;
391     pub fn lseek(fd: ::c_int, offset: off_t, whence: ::c_int) -> off_t;
392     pub fn pathconf(path: *const c_char, name: ::c_int) -> c_long;
393     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
394                link_name = "pause$UNIX2003")]
395     pub fn pause() -> ::c_int;
396     pub fn pipe(fds: *mut ::c_int) -> ::c_int;
397     pub fn posix_memalign(memptr: *mut *mut ::c_void,
398                       align: ::size_t,
399                       size: ::size_t) -> ::c_int;
400     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
401                link_name = "read$UNIX2003")]
402     pub fn read(fd: ::c_int, buf: *mut ::c_void, count: ::size_t)
403                 -> ::ssize_t;
404     pub fn rmdir(path: *const c_char) -> ::c_int;
405     pub fn setgid(gid: gid_t) -> ::c_int;
406     pub fn setpgid(pid: pid_t, pgid: pid_t) -> ::c_int;
407     pub fn setsid() -> pid_t;
408     pub fn setuid(uid: uid_t) -> ::c_int;
409     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
410                link_name = "sleep$UNIX2003")]
411     pub fn sleep(secs: ::c_uint) -> ::c_uint;
412     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
413                link_name = "nanosleep$UNIX2003")]
414     #[cfg_attr(target_os = "netbsd", link_name = "__nanosleep50")]
415     pub fn nanosleep(rqtp: *const timespec,
416                      rmtp: *mut timespec) -> ::c_int;
417     pub fn tcgetpgrp(fd: ::c_int) -> pid_t;
418     pub fn ttyname(fd: ::c_int) -> *mut c_char;
419     pub fn unlink(c: *const c_char) -> ::c_int;
420     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
421                link_name = "wait$UNIX2003")]
422     pub fn wait(status: *mut ::c_int) -> pid_t;
423     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
424                link_name = "waitpid$UNIX2003")]
425     pub fn waitpid(pid: pid_t, status: *mut ::c_int, options: ::c_int)
426                    -> pid_t;
427     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
428                link_name = "write$UNIX2003")]
429     pub fn write(fd: ::c_int, buf: *const ::c_void, count: ::size_t)
430                  -> ::ssize_t;
431     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
432                link_name = "pread$UNIX2003")]
433     pub fn pread(fd: ::c_int, buf: *mut ::c_void, count: ::size_t,
434                  offset: off_t) -> ::ssize_t;
435     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
436                link_name = "pwrite$UNIX2003")]
437     pub fn pwrite(fd: ::c_int, buf: *const ::c_void, count: ::size_t,
438                   offset: off_t) -> ::ssize_t;
439     pub fn umask(mask: mode_t) -> mode_t;
440 
441     #[cfg_attr(target_os = "netbsd", link_name = "__utime50")]
442     pub fn utime(file: *const c_char, buf: *const utimbuf) -> ::c_int;
443 
444     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
445                    link_name = "kill$UNIX2003")]
446     pub fn kill(pid: pid_t, sig: ::c_int) -> ::c_int;
447 
448     pub fn mlock(addr: *const ::c_void, len: ::size_t) -> ::c_int;
449     pub fn munlock(addr: *const ::c_void, len: ::size_t) -> ::c_int;
450     pub fn mlockall(flags: ::c_int) -> ::c_int;
451     pub fn munlockall() -> ::c_int;
452 
453     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
454                link_name = "mmap$UNIX2003")]
455     pub fn mmap(addr: *mut ::c_void,
456                 len: ::size_t,
457                 prot: ::c_int,
458                 flags: ::c_int,
459                 fd: ::c_int,
460                 offset: off_t)
461                 -> *mut ::c_void;
462     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
463                link_name = "munmap$UNIX2003")]
464     pub fn munmap(addr: *mut ::c_void, len: ::size_t) -> ::c_int;
465 
466     pub fn if_nametoindex(ifname: *const c_char) -> ::c_uint;
467     pub fn if_indextoname(ifindex: ::c_uint,
468                           ifname: *mut ::c_char) -> *mut ::c_char;
469 
470     #[cfg_attr(target_os = "macos", link_name = "lstat$INODE64")]
471     #[cfg_attr(target_os = "netbsd", link_name = "__lstat50")]
472     pub fn lstat(path: *const c_char, buf: *mut stat) -> ::c_int;
473 
474     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
475                link_name = "fsync$UNIX2003")]
476     pub fn fsync(fd: ::c_int) -> ::c_int;
477 
478     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
479                link_name = "setenv$UNIX2003")]
480     pub fn setenv(name: *const c_char, val: *const c_char,
481                   overwrite: ::c_int) -> ::c_int;
482     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
483                link_name = "unsetenv$UNIX2003")]
484     #[cfg_attr(target_os = "netbsd", link_name = "__unsetenv13")]
485     pub fn unsetenv(name: *const c_char) -> ::c_int;
486 
487     pub fn symlink(path1: *const c_char,
488                    path2: *const c_char) -> ::c_int;
489 
490     pub fn ftruncate(fd: ::c_int, length: off_t) -> ::c_int;
491 
492     pub fn signal(signum: ::c_int, handler: sighandler_t) -> sighandler_t;
493 
494     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
495                link_name = "getrlimit$UNIX2003")]
496     pub fn getrlimit(resource: ::c_int, rlim: *mut rlimit) -> ::c_int;
497     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
498                link_name = "setrlimit$UNIX2003")]
499     pub fn setrlimit(resource: ::c_int, rlim: *const rlimit) -> ::c_int;
500     #[cfg_attr(target_os = "netbsd", link_name = "__getrusage50")]
501     pub fn getrusage(resource: ::c_int, usage: *mut rusage) -> ::c_int;
502 
503     pub fn getdtablesize() -> ::c_int;
504     #[cfg_attr(any(target_os = "macos", target_os = "ios"),
505                link_name = "realpath$DARWIN_EXTSN")]
506     pub fn realpath(pathname: *const ::c_char, resolved: *mut ::c_char)
507                     -> *mut ::c_char;
508 
509     pub fn flock(fd: ::c_int, operation: ::c_int) -> ::c_int;
510 
511     #[cfg_attr(target_os = "netbsd", link_name = "__gettimeofday50")]
512     pub fn gettimeofday(tp: *mut ::timeval,
513                         tz: *mut ::c_void) -> ::c_int;
514 
515     pub fn pthread_self() -> ::pthread_t;
516     pub fn pthread_create(native: *mut ::pthread_t,
517                           attr: *const ::pthread_attr_t,
518                           f: extern fn(*mut ::c_void) -> *mut ::c_void,
519                           value: *mut ::c_void) -> ::c_int;
520     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
521                link_name = "pthread_join$UNIX2003")]
522     pub fn pthread_join(native: ::pthread_t,
523                         value: *mut *mut ::c_void) -> ::c_int;
524     pub fn pthread_attr_init(attr: *mut ::pthread_attr_t) -> ::c_int;
525     pub fn pthread_attr_destroy(attr: *mut ::pthread_attr_t) -> ::c_int;
526     pub fn pthread_attr_setstacksize(attr: *mut ::pthread_attr_t,
527                                      stack_size: ::size_t) -> ::c_int;
528     pub fn pthread_attr_setdetachstate(attr: *mut ::pthread_attr_t,
529                                        state: ::c_int) -> ::c_int;
530     pub fn pthread_detach(thread: ::pthread_t) -> ::c_int;
531     #[cfg_attr(target_os = "netbsd", link_name = "__libc_thr_yield")]
532     pub fn sched_yield() -> ::c_int;
533     pub fn pthread_key_create(key: *mut pthread_key_t,
534                               dtor: Option<unsafe extern fn(*mut ::c_void)>)
535                               -> ::c_int;
536     pub fn pthread_key_delete(key: pthread_key_t) -> ::c_int;
537     pub fn pthread_getspecific(key: pthread_key_t) -> *mut ::c_void;
538     pub fn pthread_setspecific(key: pthread_key_t, value: *const ::c_void)
539                                -> ::c_int;
540     pub fn pthread_mutex_init(lock: *mut pthread_mutex_t,
541                               attr: *const pthread_mutexattr_t) -> ::c_int;
542     pub fn pthread_mutex_destroy(lock: *mut pthread_mutex_t) -> ::c_int;
543     pub fn pthread_mutex_lock(lock: *mut pthread_mutex_t) -> ::c_int;
544     pub fn pthread_mutex_trylock(lock: *mut pthread_mutex_t) -> ::c_int;
545     pub fn pthread_mutex_unlock(lock: *mut pthread_mutex_t) -> ::c_int;
546 
547     pub fn pthread_mutexattr_init(attr: *mut pthread_mutexattr_t) -> ::c_int;
548     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
549                link_name = "pthread_mutexattr_destroy$UNIX2003")]
550     pub fn pthread_mutexattr_destroy(attr: *mut pthread_mutexattr_t) -> ::c_int;
551     pub fn pthread_mutexattr_settype(attr: *mut pthread_mutexattr_t,
552                                      _type: ::c_int) -> ::c_int;
553 
554     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
555                link_name = "pthread_cond_init$UNIX2003")]
556     pub fn pthread_cond_init(cond: *mut pthread_cond_t,
557                              attr: *const pthread_condattr_t) -> ::c_int;
558     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
559                link_name = "pthread_cond_wait$UNIX2003")]
560     pub fn pthread_cond_wait(cond: *mut pthread_cond_t,
561                              lock: *mut pthread_mutex_t) -> ::c_int;
562     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
563                link_name = "pthread_cond_timedwait$UNIX2003")]
564     pub fn pthread_cond_timedwait(cond: *mut pthread_cond_t,
565                               lock: *mut pthread_mutex_t,
566                               abstime: *const ::timespec) -> ::c_int;
567     pub fn pthread_cond_signal(cond: *mut pthread_cond_t) -> ::c_int;
568     pub fn pthread_cond_broadcast(cond: *mut pthread_cond_t) -> ::c_int;
569     pub fn pthread_cond_destroy(cond: *mut pthread_cond_t) -> ::c_int;
570     pub fn pthread_condattr_init(attr: *mut pthread_condattr_t) -> ::c_int;
571     pub fn pthread_condattr_destroy(attr: *mut pthread_condattr_t) -> ::c_int;
572     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
573                link_name = "pthread_rwlock_destroy$UNIX2003")]
574     pub fn pthread_rwlock_destroy(lock: *mut pthread_rwlock_t) -> ::c_int;
575     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
576                link_name = "pthread_rwlock_rdlock$UNIX2003")]
577     pub fn pthread_rwlock_rdlock(lock: *mut pthread_rwlock_t) -> ::c_int;
578     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
579                link_name = "pthread_rwlock_tryrdlock$UNIX2003")]
580     pub fn pthread_rwlock_tryrdlock(lock: *mut pthread_rwlock_t) -> ::c_int;
581     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
582                link_name = "pthread_rwlock_wrlock$UNIX2003")]
583     pub fn pthread_rwlock_wrlock(lock: *mut pthread_rwlock_t) -> ::c_int;
584     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
585                link_name = "pthread_rwlock_trywrlock$UNIX2003")]
586     pub fn pthread_rwlock_trywrlock(lock: *mut pthread_rwlock_t) -> ::c_int;
587     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
588                link_name = "pthread_rwlock_unlock$UNIX2003")]
589     pub fn pthread_rwlock_unlock(lock: *mut pthread_rwlock_t) -> ::c_int;
590     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
591                link_name = "pthread_sigmask$UNIX2003")]
592     pub fn pthread_sigmask(how: ::c_int, set: *const sigset_t,
593                            oldset: *mut sigset_t) -> ::c_int;
594     pub fn pthread_kill(thread: ::pthread_t, sig: ::c_int) -> ::c_int;
595     #[cfg_attr(all(target_os = "linux", not(target_env = "musl")),
596                link_name = "__xpg_strerror_r")]
597     pub fn strerror_r(errnum: ::c_int, buf: *mut c_char,
598                       buflen: ::size_t) -> ::c_int;
599 
600     pub fn getsockopt(sockfd: ::c_int,
601                       level: ::c_int,
602                       optname: ::c_int,
603                       optval: *mut ::c_void,
604                       optlen: *mut ::socklen_t) -> ::c_int;
605     pub fn raise(signum: ::c_int) -> ::c_int;
606     #[cfg_attr(target_os = "netbsd", link_name = "__sigaction14")]
607     pub fn sigaction(signum: ::c_int,
608                      act: *const sigaction,
609                      oldact: *mut sigaction) -> ::c_int;
610     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
611                link_name = "sigaltstack$UNIX2003")]
612     #[cfg_attr(target_os = "netbsd", link_name = "__sigaltstack14")]
613     pub fn sigaltstack(ss: *const stack_t,
614                        oss: *mut stack_t) -> ::c_int;
615     #[cfg_attr(all(target_os = "macos", target_arch ="x86"),
616                link_name = "sigwait$UNIX2003")]
617     pub fn sigwait(set: *const sigset_t,
618                    sig: *mut ::c_int) -> ::c_int;
619 
620     #[cfg_attr(target_os = "netbsd", link_name = "__utimes50")]
621     pub fn utimes(filename: *const ::c_char,
622                   times: *const ::timeval) -> ::c_int;
623     pub fn dlopen(filename: *const ::c_char,
624                   flag: ::c_int) -> *mut ::c_void;
625     pub fn dlerror() -> *mut ::c_char;
626     pub fn dlsym(handle: *mut ::c_void,
627                  symbol: *const ::c_char) -> *mut ::c_void;
628     pub fn dlclose(handle: *mut ::c_void) -> ::c_int;
629     pub fn dladdr(addr: *const ::c_void, info: *mut Dl_info) -> ::c_int;
630 
631     pub fn getaddrinfo(node: *const c_char,
632                        service: *const c_char,
633                        hints: *const addrinfo,
634                        res: *mut *mut addrinfo) -> ::c_int;
635     pub fn freeaddrinfo(res: *mut addrinfo);
636     pub fn gai_strerror(errcode: ::c_int) -> *const ::c_char;
637 
638     #[cfg_attr(target_os = "netbsd", link_name = "__gmtime_r50")]
639     pub fn gmtime_r(time_p: *const time_t, result: *mut tm) -> *mut tm;
640     #[cfg_attr(target_os = "netbsd", link_name = "__localtime_r50")]
641     pub fn localtime_r(time_p: *const time_t, result: *mut tm) -> *mut tm;
642     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
643                link_name = "mktime$UNIX2003")]
644     #[cfg_attr(target_os = "netbsd", link_name = "__mktime50")]
645     pub fn mktime(tm: *mut tm) -> time_t;
646 
647     #[cfg_attr(target_os = "netbsd", link_name = "__mknod50")]
648     pub fn mknod(pathname: *const ::c_char, mode: ::mode_t,
649                  dev: ::dev_t) -> ::c_int;
650     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
651                link_name = "writev$UNIX2003")]
652     pub fn writev(fd: ::c_int,
653                   iov: *const ::iovec,
654                   iovcnt: ::c_int) -> ::ssize_t;
655     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
656                link_name = "readv$UNIX2003")]
657     pub fn readv(fd: ::c_int,
658                  iov: *const ::iovec,
659                  iovcnt: ::c_int) -> ::ssize_t;
660     pub fn uname(buf: *mut ::utsname) -> ::c_int;
661     pub fn daemon(nochdir: ::c_int, noclose: ::c_int) -> ::c_int;
662     pub fn gethostname(name: *mut ::c_char, len: ::size_t) -> ::c_int;
663     pub fn chroot(name: *const ::c_char) -> ::c_int;
664     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
665                link_name = "usleep$UNIX2003")]
666     pub fn usleep(secs: ::c_uint) -> ::c_int;
667     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
668                link_name = "send$UNIX2003")]
669     pub fn send(socket: ::c_int, buf: *const ::c_void, len: ::size_t,
670                 flags: ::c_int) -> ::ssize_t;
671     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
672                link_name = "recv$UNIX2003")]
673     pub fn recv(socket: ::c_int, buf: *mut ::c_void, len: ::size_t,
674                 flags: ::c_int) -> ::ssize_t;
675     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
676                link_name = "putenv$UNIX2003")]
677     #[cfg_attr(target_os = "netbsd", link_name = "__putenv50")]
678     pub fn putenv(string: *mut c_char) -> ::c_int;
679     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
680                link_name = "sendmsg$UNIX2003")]
681     pub fn sendmsg(fd: ::c_int,
682                    msg: *const msghdr,
683                    flags: ::c_int) -> ::ssize_t;
684     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
685                link_name = "recvmsg$UNIX2003")]
686     pub fn recvmsg(fd: ::c_int, msg: *mut msghdr, flags: ::c_int) -> ::ssize_t;
687     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
688                link_name = "poll$UNIX2003")]
689     pub fn poll(fds: *mut pollfd, nfds: nfds_t, timeout: ::c_int) -> ::c_int;
690     #[cfg_attr(all(target_os = "macos", target_arch = "x86_64"),
691                link_name = "select$1050")]
692     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
693                link_name = "select$UNIX2003")]
694     #[cfg_attr(target_os = "netbsd", link_name = "__select50")]
695     pub fn select(nfds: ::c_int,
696                   readfs: *mut fd_set,
697                   writefds: *mut fd_set,
698                   errorfds: *mut fd_set,
699                   timeout: *mut timeval) -> ::c_int;
700     #[cfg_attr(target_os = "netbsd", link_name = "__setlocale50")]
701     pub fn setlocale(category: ::c_int,
702                      locale: *const ::c_char) -> *mut ::c_char;
703     pub fn localeconv() -> *mut lconv;
704 
705     pub fn sem_destroy(sem: *mut sem_t) -> ::c_int;
706     pub fn sem_open(name: *const ::c_char, oflag: ::c_int, ...) -> *mut sem_t;
707     pub fn sem_close(sem: *mut sem_t) -> ::c_int;
708     pub fn sem_unlink(name: *const ::c_char) -> ::c_int;
709     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
710                link_name = "sem_wait$UNIX2003")]
711     pub fn sem_wait(sem: *mut sem_t) -> ::c_int;
712     pub fn sem_trywait(sem: *mut sem_t) -> ::c_int;
713     pub fn sem_post(sem: *mut sem_t) -> ::c_int;
714     pub fn sem_init(sem: *mut sem_t,
715                     pshared: ::c_int,
716                     value: ::c_uint)
717                     -> ::c_int;
718 }
719 
720 // TODO: get rid of this cfg(not(...))
721 #[cfg(not(target_os = "android"))] // " if " -- appease style checker
722 extern {
723     pub fn getifaddrs(ifap: *mut *mut ifaddrs) -> ::c_int;
724     pub fn freeifaddrs(ifa: *mut ifaddrs);
725     #[cfg_attr(target_os = "macos", link_name = "glob$INODE64")]
726     #[cfg_attr(target_os = "netbsd", link_name = "__glob30")]
727     pub fn glob(pattern: *const c_char,
728                 flags: ::c_int,
729                 errfunc: Option<extern fn(epath: *const c_char,
730                                           errno: ::c_int) -> ::c_int>,
731                 pglob: *mut glob_t) -> ::c_int;
732     #[cfg_attr(target_os = "netbsd", link_name = "__globfree30")]
733     pub fn globfree(pglob: *mut glob_t);
734 
735     pub fn posix_madvise(addr: *mut ::c_void, len: ::size_t, advice: ::c_int)
736                          -> ::c_int;
737 
738     pub fn shm_unlink(name: *const c_char) -> ::c_int;
739 
740     #[cfg_attr(all(target_os = "macos", target_arch = "x86_64"),
741                link_name = "seekdir$INODE64")]
742     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
743                link_name = "seekdir$INODE64$UNIX2003")]
744     pub fn seekdir(dirp: *mut ::DIR, loc: c_long);
745 
746     #[cfg_attr(all(target_os = "macos", target_arch = "x86_64"),
747                link_name = "telldir$INODE64")]
748     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
749                link_name = "telldir$INODE64$UNIX2003")]
750     pub fn telldir(dirp: *mut ::DIR) -> c_long;
751 
752     pub fn getsid(pid: pid_t) -> pid_t;
753     pub fn madvise(addr: *mut ::c_void, len: ::size_t, advice: ::c_int)
754                    -> ::c_int;
755     pub fn readlink(path: *const c_char,
756                     buf: *mut c_char,
757                     bufsz: ::size_t)
758                     -> ::ssize_t;
759 
760     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
761                link_name = "msync$UNIX2003")]
762     #[cfg_attr(target_os = "netbsd", link_name = "__msync13")]
763     pub fn msync(addr: *mut ::c_void, len: ::size_t, flags: ::c_int) -> ::c_int;
764     pub fn sysconf(name: ::c_int) -> c_long;
765     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
766                link_name = "recvfrom$UNIX2003")]
767     pub fn recvfrom(socket: ::c_int, buf: *mut ::c_void, len: ::size_t,
768                     flags: ::c_int, addr: *mut sockaddr,
769                     addrlen: *mut socklen_t) -> ::ssize_t;
770     pub fn mkfifo(path: *const c_char, mode: mode_t) -> ::c_int;
771 
772     #[cfg_attr(target_os = "netbsd", link_name = "__sigemptyset14")]
773     pub fn sigemptyset(set: *mut sigset_t) -> ::c_int;
774     #[cfg_attr(target_os = "netbsd", link_name = "__sigaddset14")]
775     pub fn sigaddset(set: *mut sigset_t, signum: ::c_int) -> ::c_int;
776     #[cfg_attr(target_os = "netbsd", link_name = "__sigfillset14")]
777     pub fn sigfillset(set: *mut sigset_t) -> ::c_int;
778     #[cfg_attr(target_os = "netbsd", link_name = "__sigdelset14")]
779     pub fn sigdelset(set: *mut sigset_t, signum: ::c_int) -> ::c_int;
780     #[cfg_attr(target_os = "netbsd", link_name = "__sigismember14")]
781     pub fn sigismember(set: *const sigset_t, signum: ::c_int) -> ::c_int;
782     #[cfg_attr(all(target_os = "macos", target_arch = "x86_64"),
783                link_name = "pselect$1050")]
784     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
785                link_name = "pselect$UNIX2003")]
786     #[cfg_attr(target_os = "netbsd", link_name = "__pselect50")]
787     pub fn pselect(nfds: ::c_int,
788                    readfs: *mut fd_set,
789                    writefds: *mut fd_set,
790                    errorfds: *mut fd_set,
791                    timeout: *const timespec,
792                    sigmask: *const sigset_t) -> ::c_int;
793     pub fn fseeko(stream: *mut ::FILE,
794                   offset: ::off_t,
795                   whence: ::c_int) -> ::c_int;
796     pub fn ftello(stream: *mut ::FILE) -> ::off_t;
797     #[cfg_attr(target_os = "netbsd", link_name = "__timegm50")]
798     pub fn timegm(tm: *mut ::tm) -> time_t;
799     pub fn statvfs(path: *const c_char, buf: *mut statvfs) -> ::c_int;
800     pub fn fstatvfs(fd: ::c_int, buf: *mut statvfs) -> ::c_int;
801     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
802                link_name = "tcdrain$UNIX2003")]
803     pub fn tcdrain(fd: ::c_int) -> ::c_int;
804     pub fn cfgetispeed(termios: *const ::termios) -> ::speed_t;
805     pub fn cfgetospeed(termios: *const ::termios) -> ::speed_t;
806     pub fn cfsetispeed(termios: *mut ::termios, speed: ::speed_t) -> ::c_int;
807     pub fn cfsetospeed(termios: *mut ::termios, speed: ::speed_t) -> ::c_int;
808     pub fn tcgetattr(fd: ::c_int, termios: *mut ::termios) -> ::c_int;
809     pub fn tcsetattr(fd: ::c_int,
810                      optional_actions: ::c_int,
811                      termios: *const ::termios) -> ::c_int;
812     pub fn tcflow(fd: ::c_int, action: ::c_int) -> ::c_int;
813     pub fn tcflush(fd: ::c_int, action: ::c_int) -> ::c_int;
814     pub fn tcsendbreak(fd: ::c_int, duration: ::c_int) -> ::c_int;
815     pub fn mkstemp(template: *mut ::c_char) -> ::c_int;
816     pub fn mkstemps(template: *mut ::c_char, suffixlen: ::c_int) -> ::c_int;
817     pub fn mkdtemp(template: *mut ::c_char) -> *mut ::c_char;
818     pub fn futimes(fd: ::c_int, times: *const ::timeval) -> ::c_int;
819     pub fn nl_langinfo(item: ::nl_item) -> *mut ::c_char;
820 
821     pub fn openlog(ident: *const ::c_char, logopt: ::c_int, facility: ::c_int);
822     pub fn closelog();
823     pub fn setlogmask(maskpri: ::c_int) -> ::c_int;
824     pub fn syslog(priority: ::c_int, message: *const ::c_char, ...);
825     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
826                link_name = "nice$UNIX2003")]
827     pub fn nice(incr: ::c_int) -> ::c_int;
828 }
829 
830 cfg_if! {
831     if #[cfg(any(target_os = "linux",
832                  target_os = "android",
833                  target_os = "emscripten"))] {
834         mod notbsd;
835         pub use self::notbsd::*;
836     } else if #[cfg(any(target_os = "macos",
837                         target_os = "ios",
838                         target_os = "freebsd",
839                         target_os = "dragonfly",
840                         target_os = "openbsd",
841                         target_os = "netbsd",
842                         target_os = "bitrig"))] {
843         mod bsd;
844         pub use self::bsd::*;
845     } else if #[cfg(target_os = "solaris")] {
846         mod solaris;
847         pub use self::solaris::*;
848     } else {
849         // Unknown target_os
850     }
851 }
852