1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
//! 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 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;

pub enum DIR {}

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

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

    pub struct timespec {
        pub tv_sec: time_t,
        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,
        pub ru_ixrss: c_long,
        pub ru_idrss: c_long,
        pub ru_isrss: c_long,
        pub ru_minflt: c_long,
        pub ru_majflt: c_long,
        pub ru_nswap: c_long,
        pub ru_inblock: c_long,
        pub ru_oublock: c_long,
        pub ru_msgsnd: c_long,
        pub ru_msgrcv: c_long,
        pub ru_nsignals: c_long,
        pub ru_nvcsw: c_long,
        pub ru_nivcsw: c_long,

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

    #[cfg_attr(target_os = "netbsd", repr(packed))]
    pub struct in_addr {
        pub s_addr: in_addr_t,
    }

    pub struct in6_addr {
        pub s6_addr: [u8; 16],
        __align: [u32; 0],
    }

    pub struct ip_mreq {
        pub imr_multiaddr: in_addr,
        pub imr_interface: in_addr,
    }

    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 const WNOHANG: ::c_int = 1;
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_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;

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: ::c_int = 0x800;
pub const S_ISGID: ::c_int = 0x400;
pub const S_ISVTX: ::c_int = 0x200;

cfg_if! {
    if #[cfg(feature = "default")] {
        // cargo build, don't pull in anything extra as the libstd  dep
        // already pulls in all libs.
    } else if #[cfg(target_env = "musl")] {
        #[link(name = "c", kind = "static")]
        extern {}
    } else if #[cfg(any(target_os = "macos",
                        target_os = "ios",
                        target_os = "android",
                        target_os = "openbsd",
                        target_os = "bitrig"))] {
        #[link(name = "c")]
        #[link(name = "m")]
        extern {}
    } else {
        #[link(name = "c")]
        #[link(name = "m")]
        #[link(name = "rt")]
        extern {}
    }
}

extern {
    #[cfg_attr(target_os = "netbsd", link_name = "__socket30")]
    pub fn socket(domain: ::c_int, ty: ::c_int, protocol: ::c_int) -> ::c_int;
    #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
               link_name = "connect$UNIX2003")]
    pub fn connect(socket: ::c_int, address: *const sockaddr,
                   len: socklen_t) -> ::c_int;
    #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
               link_name = "bind$UNIX2003")]
    pub fn bind(socket: ::c_int, address: *const sockaddr,
                address_len: socklen_t) -> ::c_int;
    #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
               link_name = "listen$UNIX2003")]
    pub fn listen(socket: ::c_int, backlog: ::c_int) -> ::c_int;
    #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
               link_name = "accept$UNIX2003")]
    pub fn accept(socket: ::c_int, address: *mut sockaddr,
                  address_len: *mut socklen_t) -> ::c_int;
    #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
               link_name = "getpeername$UNIX2003")]
    pub fn getpeername(socket: ::c_int, address: *mut sockaddr,
                       address_len: *mut socklen_t) -> ::c_int;
    #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
               link_name = "getsockname$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$UNIX2003")]
    pub fn socketpair(domain: ::c_int, type_: ::c_int, protocol: ::c_int,
                      socket_vector: *mut ::c_int) -> ::c_int;
    #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
               link_name = "sendto$UNIX2003")]
    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(target_os = "macos", link_name = "fstat$INODE64")]
    #[cfg_attr(target_os = "netbsd", link_name = "__fstat50")]
    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(target_os = "macos", link_name = "stat$INODE64")]
    #[cfg_attr(target_os = "netbsd", link_name = "__stat50")]
    pub fn stat(path: *const c_char, buf: *mut stat) -> ::c_int;

    #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
               link_name = "popen$UNIX2003")]
    pub fn popen(command: *const c_char,
                 mode: *const c_char) -> *mut ::FILE;
    pub fn pclose(stream: *mut ::FILE) -> ::c_int;
    #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
               link_name = "fdopen$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$UNIX2003")]
    #[cfg_attr(target_os = "netbsd", link_name = "__opendir30")]
    pub fn opendir(dirname: *const c_char) -> *mut ::DIR;
    #[cfg_attr(target_os = "macos", link_name = "readdir_r$INODE64")]
    #[cfg_attr(target_os = "netbsd", link_name = "__readdir_r30")]
    pub fn readdir_r(dirp: *mut ::DIR, entry: *mut ::dirent,
                     result: *mut *mut ::dirent) -> ::c_int;
    #[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 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 chown(path: *const c_char, uid: uid_t,
                 gid: gid_t) -> ::c_int;
    #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
               link_name = "close$UNIX2003")]
    pub fn close(fd: ::c_int) -> ::c_int;
    pub fn dup(fd: ::c_int) -> ::c_int;
    pub fn dup2(src: ::c_int, dst: ::c_int) -> ::c_int;
    pub fn execv(prog: *const c_char,
                 argv: *const *const c_char) -> ::c_int;
    pub fn execve(prog: *const c_char, argv: *const *const c_char,
                  envp: *const *const c_char)
                  -> ::c_int;
    pub fn execvp(c: *const c_char,
                  argv: *const *const c_char) -> ::c_int;
    pub fn fork() -> pid_t;
    pub fn fpathconf(filedes: ::c_int, name: ::c_int) -> c_long;
    pub fn getcwd(buf: *mut c_char, size: ::size_t) -> *mut c_char;
    pub fn getegid() -> gid_t;
    pub fn geteuid() -> uid_t;
    pub fn getgid() -> gid_t;
    pub fn getgroups(ngroups_max: ::c_int, groups: *mut gid_t)
                     -> ::c_int;
    pub fn getlogin() -> *mut c_char;
    #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
               link_name = "getopt$UNIX2003")]
    pub fn getopt(argc: ::c_int, argv: *const *mut c_char,
                  optstr: *const c_char) -> ::c_int;
    pub fn 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;
    #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
               link_name = "pause$UNIX2003")]
    pub fn pause() -> ::c_int;
    pub fn pipe(fds: *mut ::c_int) -> ::c_int;
    #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
               link_name = "read$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 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 ttyname(fd: ::c_int) -> *mut c_char;
    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(all(target_os = "macos", target_arch = "x86"),
               link_name = "write$UNIX2003")]
    pub fn write(fd: ::c_int, buf: *const ::c_void, count: ::size_t)
                 -> ::ssize_t;
    #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
               link_name = "pread$UNIX2003")]
    pub fn pread(fd: ::c_int, buf: *mut ::c_void, count: ::size_t,
                 offset: off_t) -> ::ssize_t;
    #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
               link_name = "pwrite$UNIX2003")]
    pub fn pwrite(fd: ::c_int, buf: *const ::c_void, count: ::size_t,
                  offset: off_t) -> ::ssize_t;
    pub fn umask(mask: mode_t) -> mode_t;

    #[cfg_attr(target_os = "netbsd", link_name = "__utime50")]
    pub fn utime(file: *const c_char, buf: *const utimbuf) -> ::c_int;

    #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
                   link_name = "kill$UNIX2003")]
    pub fn kill(pid: pid_t, sig: ::c_int) -> ::c_int;

    pub fn mlock(addr: *const ::c_void, len: ::size_t) -> ::c_int;
    pub fn munlock(addr: *const ::c_void, len: ::size_t) -> ::c_int;
    pub fn mlockall(flags: ::c_int) -> ::c_int;
    pub fn munlockall() -> ::c_int;

    #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
               link_name = "mmap$UNIX2003")]
    pub fn mmap(addr: *mut ::c_void,
                len: ::size_t,
                prot: ::c_int,
                flags: ::c_int,
                fd: ::c_int,
                offset: off_t)
                -> *mut ::c_void;
    #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
               link_name = "munmap$UNIX2003")]
    pub fn munmap(addr: *mut ::c_void, len: ::size_t) -> ::c_int;

    pub fn if_nametoindex(ifname: *const c_char) -> ::c_uint;

    #[cfg_attr(target_os = "macos", link_name = "lstat$INODE64")]
    #[cfg_attr(target_os = "netbsd", link_name = "__lstat50")]
    pub fn lstat(path: *const c_char, buf: *mut stat) -> ::c_int;

    #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
               link_name = "fsync$UNIX2003")]
    pub fn fsync(fd: ::c_int) -> ::c_int;

    #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
               link_name = "setenv$UNIX2003")]
    pub fn setenv(name: *const c_char, val: *const c_char,
                  overwrite: ::c_int) -> ::c_int;
    #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
               link_name = "unsetenv$UNIX2003")]
    #[cfg_attr(target_os = "netbsd", link_name = "__unsetenv13")]
    pub fn unsetenv(name: *const c_char) -> ::c_int;

    pub fn symlink(path1: *const c_char,
                   path2: *const c_char) -> ::c_int;

    pub fn ftruncate(fd: ::c_int, length: off_t) -> ::c_int;

    #[cfg_attr(target_os = "android", link_name = "bsd_signal")]
    pub fn signal(signum: ::c_int, handler: sighandler_t) -> sighandler_t;

    #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
               link_name = "getrlimit$UNIX2003")]
    pub fn getrlimit(resource: ::c_int, rlim: *mut rlimit) -> ::c_int;
    #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
               link_name = "setrlimit$UNIX2003")]
    pub fn setrlimit(resource: ::c_int, rlim: *const rlimit) -> ::c_int;
    #[cfg_attr(target_os = "netbsd", link_name = "__getrusage50")]
    pub fn getrusage(resource: ::c_int, usage: *mut rusage) -> ::c_int;

    pub fn getdtablesize() -> ::c_int;
    #[cfg_attr(any(target_os = "macos", target_os = "ios"),
               link_name = "realpath$DARWIN_EXTSN")]
    pub fn realpath(pathname: *const ::c_char, resolved: *mut ::c_char)
                    -> *mut ::c_char;

    pub fn flock(fd: ::c_int, operation: ::c_int) -> ::c_int;

    #[cfg_attr(arget_os = "netbsd", link_name = "__gettimeofday50")]
    pub fn gettimeofday(tp: *mut ::timeval,
                        tz: *mut ::c_void) -> ::c_int;

    pub fn pthread_self() -> ::pthread_t;
    pub fn pthread_create(native: *mut ::pthread_t,
                          attr: *const ::pthread_attr_t,
                          f: extern fn(*mut ::c_void) -> *mut ::c_void,
                          value: *mut ::c_void) -> ::c_int;
    #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
               link_name = "pthread_join$UNIX2003")]
    pub fn pthread_join(native: ::pthread_t,
                        value: *mut *mut ::c_void) -> ::c_int;
    pub fn pthread_attr_init(attr: *mut ::pthread_attr_t) -> ::c_int;
    pub fn pthread_attr_destroy(attr: *mut ::pthread_attr_t) -> ::c_int;
    pub fn pthread_attr_setstacksize(attr: *mut ::pthread_attr_t,
                                     stack_size: ::size_t) -> ::c_int;
    pub fn pthread_attr_setdetachstate(attr: *mut ::pthread_attr_t,
                                       state: ::c_int) -> ::c_int;
    pub fn pthread_detach(thread: ::pthread_t) -> ::c_int;
    #[cfg_attr(target_os = "netbsd", link_name = "__libc_thr_yield")]
    pub fn sched_yield() -> ::c_int;
    pub fn pthread_key_create(key: *mut pthread_key_t,
                              dtor: ::dox::Option<unsafe extern fn(*mut ::c_void)>)
                              -> ::c_int;
    pub fn pthread_key_delete(key: pthread_key_t) -> ::c_int;
    pub fn pthread_getspecific(key: pthread_key_t) -> *mut ::c_void;
    pub fn pthread_setspecific(key: pthread_key_t, value: *const ::c_void)
                               -> ::c_int;
    pub fn pthread_mutex_init(lock: *mut pthread_mutex_t,
                              attr: *const pthread_mutexattr_t) -> ::c_int;
    pub fn pthread_mutex_destroy(lock: *mut pthread_mutex_t) -> ::c_int;
    pub fn pthread_mutex_lock(lock: *mut pthread_mutex_t) -> ::c_int;
    pub fn pthread_mutex_trylock(lock: *mut pthread_mutex_t) -> ::c_int;
    pub fn pthread_mutex_unlock(lock: *mut pthread_mutex_t) -> ::c_int;

    pub fn pthread_mutexattr_init(attr: *mut pthread_mutexattr_t) -> ::c_int;
    #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
               link_name = "pthread_mutexattr_destroy$UNIX2003")]
    pub fn pthread_mutexattr_destroy(attr: *mut pthread_mutexattr_t) -> ::c_int;
    pub fn pthread_mutexattr_settype(attr: *mut pthread_mutexattr_t,
                                     _type: ::c_int) -> ::c_int;

    #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
               link_name = "pthread_cond_wait$UNIX2003")]
    pub fn pthread_cond_wait(cond: *mut pthread_cond_t,
                             lock: *mut pthread_mutex_t) -> ::c_int;
    #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
               link_name = "pthread_cond_timedwait$UNIX2003")]
    pub fn pthread_cond_timedwait(cond: *mut pthread_cond_t,
                              lock: *mut pthread_mutex_t,
                              abstime: *const ::timespec) -> ::c_int;
    pub fn pthread_cond_signal(cond: *mut pthread_cond_t) -> ::c_int;
    pub fn pthread_cond_broadcast(cond: *mut pthread_cond_t) -> ::c_int;
    pub fn pthread_cond_destroy(cond: *mut pthread_cond_t) -> ::c_int;
    #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
               link_name = "pthread_rwlock_destroy$UNIX2003")]
    pub fn pthread_rwlock_destroy(lock: *mut pthread_rwlock_t) -> ::c_int;
    #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
               link_name = "pthread_rwlock_rdlock$UNIX2003")]
    pub fn pthread_rwlock_rdlock(lock: *mut pthread_rwlock_t) -> ::c_int;
    #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
               link_name = "pthread_rwlock_tryrdlock$UNIX2003")]
    pub fn pthread_rwlock_tryrdlock(lock: *mut pthread_rwlock_t) -> ::c_int;
    #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
               link_name = "pthread_rwlock_wrlock$UNIX2003")]
    pub fn pthread_rwlock_wrlock(lock: *mut pthread_rwlock_t) -> ::c_int;
    #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
               link_name = "pthread_rwlock_trywrlock$UNIX2003")]
    pub fn pthread_rwlock_trywrlock(lock: *mut pthread_rwlock_t) -> ::c_int;
    #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
               link_name = "pthread_rwlock_unlock$UNIX2003")]
    pub fn pthread_rwlock_unlock(lock: *mut pthread_rwlock_t) -> ::c_int;
    #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
               link_name = "pthread_sigmask$UNIX2003")]
    pub fn pthread_sigmask(how: ::c_int, set: *const sigset_t,
                           oldset: *mut sigset_t) -> ::c_int;

    // #[cfg_attr(target_os = "linux", link_name = "__xpg_strerror_r")]
    pub fn strerror_r(errnum: ::c_int, buf: *mut c_char,
                      buflen: ::size_t) -> ::c_int;

    pub fn getsockopt(sockfd: ::c_int,
                      level: ::c_int,
                      optname: ::c_int,
                      optval: *mut ::c_void,
                      optlen: *mut ::socklen_t) -> ::c_int;
    pub fn raise(signum: ::c_int) -> ::c_int;
    pub fn sigaction(signum: ::c_int,
                     act: *const sigaction,
                     oldact: *mut sigaction) -> ::c_int;
    #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
               link_name = "sigaltstack$UNIX2003")]
    pub fn sigaltstack(ss: *const stack_t,
                       oss: *mut stack_t) -> ::c_int;

    #[cfg_attr(target_os = "netbsd", link_name = "__utimes50")]
    pub fn utimes(filename: *const ::c_char,
                  times: *const ::timeval) -> ::c_int;
    pub fn dlopen(filename: *const ::c_char,
                  flag: ::c_int) -> *mut ::c_void;
    pub fn dlerror() -> *mut ::c_char;
    pub fn dlsym(handle: *mut ::c_void,
                 symbol: *const ::c_char) -> *mut ::c_void;
    pub fn dlclose(handle: *mut ::c_void) -> ::c_int;
    pub fn dladdr(addr: *const ::c_void, info: *mut Dl_info) -> ::c_int;

    pub fn getaddrinfo(node: *const c_char,
                       service: *const c_char,
                       hints: *const addrinfo,
                       res: *mut *mut addrinfo) -> ::c_int;
    pub fn freeaddrinfo(res: *mut addrinfo);
    pub fn gai_strerror(errcode: ::c_int) -> *const ::c_char;

    #[cfg_attr(target_os = "netbsd", link_name = "__gmtime_r50")]
    pub fn gmtime_r(time_p: *const time_t, result: *mut tm) -> *mut tm;
    #[cfg_attr(target_os = "netbsd", link_name = "__localtime_r50")]
    pub fn localtime_r(time_p: *const time_t, result: *mut tm) -> *mut tm;
    #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
               link_name = "mktime$UNIX2003")]
    #[cfg_attr(target_os = "netbsd", link_name = "__mktime50")]
    pub fn mktime(tm: *mut tm) -> time_t;

    #[cfg_attr(target_os = "netbsd", link_name = "__mknod50")]
    pub fn mknod(pathname: *const ::c_char, mode: ::mode_t,
                 dev: ::dev_t) -> ::c_int;
    #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
               link_name = "writev$UNIX2003")]
    pub fn writev(fd: ::c_int, iov: *const ::iovec, iovcnt: ::c_int) -> ::ssize_t;
    #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
               link_name = "readv$UNIX2003")]
    pub fn readv(fd: ::c_int, iov: *const ::iovec, iovcnt: ::c_int) -> ::ssize_t;
    pub fn uname(buf: *mut ::utsname) -> ::c_int;
    pub fn daemon(nochdir: ::c_int, noclose: ::c_int) -> ::c_int;
    pub fn gethostname(name: *mut ::c_char, len: ::size_t) -> ::c_int;
    pub fn chroot(name: *const ::c_char) -> ::c_int;
}

// TODO: get rid of this #[cfg(not(...))]
#[cfg(not(target_os = "android"))]
extern {
    pub fn getifaddrs(ifap: *mut *mut ifaddrs) -> ::c_int;
    pub fn freeifaddrs(ifa: *mut ifaddrs);
    #[cfg_attr(target_os = "macos", link_name = "glob$INODE64")]
    #[cfg_attr(target_os = "netbsd", link_name = "__glob30")]
    pub fn glob(pattern: *const c_char,
                flags: ::c_int,
                errfunc: ::dox::Option<extern "C" fn(epath: *const c_char,
                                                     errno: ::c_int) -> ::c_int>,
                pglob: *mut glob_t) -> ::c_int;
    #[cfg_attr(target_os = "netbsd", link_name = "__globfree30")]
    pub fn globfree(pglob: *mut glob_t);

    pub fn posix_madvise(addr: *mut ::c_void, len: ::size_t, advice: ::c_int)
                         -> ::c_int;

    pub fn shm_unlink(name: *const c_char) -> ::c_int;

    #[cfg_attr(all(target_os = "macos", target_arch = "x86_64"),
               link_name = "seekdir$INODE64")]
    #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
               link_name = "seekdir$INODE64$UNIX2003")]
    pub fn seekdir(dirp: *mut ::DIR, loc: c_long);

    #[cfg_attr(all(target_os = "macos", target_arch = "x86_64"),
               link_name = "telldir$INODE64")]
    #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
               link_name = "telldir$INODE64$UNIX2003")]
    pub fn telldir(dirp: *mut ::DIR) -> c_long;

    pub fn getsid(pid: pid_t) -> pid_t;
    pub fn madvise(addr: *mut ::c_void, len: ::size_t, advice: ::c_int)
                   -> ::c_int;
    #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
               link_name = "putenv$UNIX2003")]
    #[cfg_attr(target_os = "netbsd", link_name = "__putenv50")]
    pub fn putenv(string: *mut c_char) -> ::c_int;
    pub fn readlink(path: *const c_char,
                    buf: *mut c_char,
                    bufsz: ::size_t)
                    -> ::ssize_t;

    #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
               link_name = "msync$UNIX2003")]
    #[cfg_attr(target_os = "netbsd", link_name = "__msync13")]
    pub fn msync(addr: *mut ::c_void, len: ::size_t, flags: ::c_int) -> ::c_int;
    pub fn sysconf(name: ::c_int) -> c_long;
    #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
               link_name = "usleep$UNIX2003")]
    pub fn usleep(secs: ::c_uint) -> ::c_int;
    #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
               link_name = "recvfrom$UNIX2003")]
    pub fn recvfrom(socket: ::c_int, buf: *mut ::c_void, len: ::size_t,
                    flags: ::c_int, addr: *mut sockaddr,
                    addrlen: *mut socklen_t) -> ::ssize_t;
    #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
               link_name = "send$UNIX2003")]
    pub fn send(socket: ::c_int, buf: *const ::c_void, len: ::size_t,
                flags: ::c_int) -> ::ssize_t;
    #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
               link_name = "recv$UNIX2003")]
    pub fn recv(socket: ::c_int, buf: *mut ::c_void, len: ::size_t,
                flags: ::c_int) -> ::ssize_t;
    pub fn mkfifo(path: *const c_char, mode: mode_t) -> ::c_int;

    #[cfg_attr(target_os = "netbsd", link_name = "__getpwuid_r50")]
    pub fn getpwuid_r(uid: ::uid_t,
                      pwd: *mut passwd,
                      buf: *mut ::c_char,
                      buflen: ::size_t,
                      result: *mut *mut passwd) -> ::c_int;
    pub fn posix_memalign(memptr: *mut *mut ::c_void,
                          align: ::size_t,
                          size: ::size_t) -> ::c_int;
    #[cfg_attr(target_os = "netbsd", link_name = "__sigemptyset14")]
    pub fn sigemptyset(set: *mut sigset_t) -> ::c_int;
    #[cfg_attr(target_os = "netbsd", link_name = "__sigaddset14")]
    pub fn sigaddset(set: *mut sigset_t, signum: ::c_int) -> ::c_int;
    #[cfg_attr(target_os = "netbsd", link_name = "__sigfillset14")]
    pub fn sigfillset(set: *mut sigset_t) -> ::c_int;
    #[cfg_attr(target_os = "netbsd", link_name = "__sigdelset14")]
    pub fn sigdelset(set: *mut sigset_t, signum: ::c_int) -> ::c_int;
    #[cfg_attr(target_os = "netbsd", link_name = "__sigismember14")]
    pub fn sigismember(set: *const sigset_t, signum: ::c_int) -> ::c_int;
    #[cfg_attr(all(target_os = "macos", target_arch = "x86_64"),
               link_name = "select$1050")]
    #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
               link_name = "select$UNIX2003")]
    #[cfg_attr(target_os = "netbsd", link_name = "__select50")]
    pub fn select(nfds: ::c_int,
                  readfs: *mut fd_set,
                  writefds: *mut fd_set,
                  errorfds: *mut fd_set,
                  timeout: *mut timeval) -> ::c_int;
    #[cfg_attr(all(target_os = "macos", target_arch = "x86_64"),
               link_name = "pselect$1050")]
    #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
               link_name = "pselect$UNIX2003")]
    #[cfg_attr(target_os = "netbsd", link_name = "__pselect50")]
    pub fn pselect(nfds: ::c_int,
                   readfs: *mut fd_set,
                   writefds: *mut fd_set,
                   errorfds: *mut fd_set,
                   timeout: *const timespec,
                   sigmask: *const sigset_t) -> ::c_int;
    pub fn fseeko(stream: *mut ::FILE,
                  offset: ::off_t,
                  whence: ::c_int) -> ::c_int;
    pub fn ftello(stream: *mut ::FILE) -> ::off_t;
    #[cfg_attr(target_os = "netbsd", link_name = "__timegm50")]
    pub fn timegm(tm: *mut ::tm) -> time_t;
    pub fn statvfs(path: *const c_char, buf: *mut statvfs) -> ::c_int;
    pub fn fstatvfs(fd: ::c_int, buf: *mut statvfs) -> ::c_int;
    #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
               link_name = "sendmsg$UNIX2003")]
    pub fn sendmsg(fd: ::c_int, msg: *const msghdr, flags: ::c_int) -> ::ssize_t;
    #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
               link_name = "recvmsg$UNIX2003")]
    pub fn recvmsg(fd: ::c_int, msg: *mut msghdr, flags: ::c_int) -> ::ssize_t;
    #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
               link_name = "tcdrain$UNIX2003")]
    pub fn tcdrain(fd: ::c_int) -> ::c_int;
    pub fn cfgetispeed(termios: *const ::termios) -> ::speed_t;
    pub fn cfgetospeed(termios: *const ::termios) -> ::speed_t;
    pub fn cfsetispeed(termios: *mut ::termios, speed: ::speed_t) -> ::c_int;
    pub fn cfsetospeed(termios: *mut ::termios, speed: ::speed_t) -> ::c_int;
    pub fn tcgetattr(fd: ::c_int, termios: *mut ::termios) -> ::c_int;
    pub fn tcsetattr(fd: ::c_int,
                     optional_actions: ::c_int,
                     termios: *const ::termios) -> ::c_int;
    pub fn tcflow(fd: ::c_int, action: ::c_int) -> ::c_int;
    pub fn tcflush(fd: ::c_int, action: ::c_int) -> ::c_int;
    pub fn tcsendbreak(fd: ::c_int, duration: ::c_int) -> ::c_int;
}

cfg_if! {
    if #[cfg(any(target_os = "linux", target_os = "android"))] {
        mod notbsd;
        pub use self::notbsd::*;
    } else if #[cfg(any(target_os = "macos",
                        target_os = "ios",
                        target_os = "freebsd",
                        target_os = "dragonfly",
                        target_os = "openbsd",
                        target_os = "netbsd",
                        target_os = "bitrig"))] {
        mod bsd;
        pub use self::bsd::*;
    } else {
        // ...
    }
}