xref: /rust-libc-0.2.174/src/unix/mod.rs (revision b9c8323b)
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 pub type c_schar = i8;
7 pub type c_uchar = u8;
8 pub type c_short = i16;
9 pub type c_ushort = u16;
10 pub type c_int = i32;
11 pub type c_uint = u32;
12 pub type c_float = f32;
13 pub type c_double = f64;
14 pub type c_longlong = i64;
15 pub type c_ulonglong = u64;
16 pub type intmax_t = i64;
17 pub type uintmax_t = u64;
18 
19 pub type size_t = usize;
20 pub type ptrdiff_t = isize;
21 pub type intptr_t = isize;
22 pub type uintptr_t = usize;
23 pub type ssize_t = isize;
24 
25 pub type pid_t = i32;
26 pub type in_addr_t = u32;
27 pub type in_port_t = u16;
28 pub type sighandler_t = ::size_t;
29 pub type cc_t = ::c_uchar;
30 
31 cfg_if! {
32     if #[cfg(any(target_os = "espidf", target_os = "horizon", target_os = "vita"))] {
33         pub type uid_t = ::c_ushort;
34         pub type gid_t = ::c_ushort;
35     } else if #[cfg(target_os = "nto")] {
36         pub type uid_t = i32;
37         pub type gid_t = i32;
38     } else {
39         pub type uid_t = u32;
40         pub type gid_t = u32;
41     }
42 }
43 
44 #[cfg_attr(feature = "extra_traits", derive(Debug))]
45 pub enum DIR {}
46 impl ::Copy for DIR {}
47 impl ::Clone for DIR {
48     fn clone(&self) -> DIR {
49         *self
50     }
51 }
52 pub type locale_t = *mut ::c_void;
53 
54 s! {
55     pub struct group {
56         pub gr_name: *mut ::c_char,
57         pub gr_passwd: *mut ::c_char,
58         pub gr_gid: ::gid_t,
59         pub gr_mem: *mut *mut ::c_char,
60     }
61 
62     pub struct utimbuf {
63         pub actime: time_t,
64         pub modtime: time_t,
65     }
66 
67     pub struct timeval {
68         pub tv_sec: time_t,
69         pub tv_usec: suseconds_t,
70     }
71 
72     // linux x32 compatibility
73     // See https://sourceware.org/bugzilla/show_bug.cgi?id=16437
74     pub struct timespec {
75         pub tv_sec: time_t,
76         #[cfg(all(target_arch = "x86_64", target_pointer_width = "32"))]
77         pub tv_nsec: i64,
78         #[cfg(not(all(target_arch = "x86_64", target_pointer_width = "32")))]
79         pub tv_nsec: ::c_long,
80     }
81 
82     pub struct rlimit {
83         pub rlim_cur: rlim_t,
84         pub rlim_max: rlim_t,
85     }
86 
87     pub struct rusage {
88         pub ru_utime: timeval,
89         pub ru_stime: timeval,
90         pub ru_maxrss: c_long,
91         #[cfg(all(target_arch = "x86_64", target_pointer_width = "32"))]
92         __pad1: u32,
93         pub ru_ixrss: c_long,
94         #[cfg(all(target_arch = "x86_64", target_pointer_width = "32"))]
95         __pad2: u32,
96         pub ru_idrss: c_long,
97         #[cfg(all(target_arch = "x86_64", target_pointer_width = "32"))]
98         __pad3: u32,
99         pub ru_isrss: c_long,
100         #[cfg(all(target_arch = "x86_64", target_pointer_width = "32"))]
101         __pad4: u32,
102         pub ru_minflt: c_long,
103         #[cfg(all(target_arch = "x86_64", target_pointer_width = "32"))]
104         __pad5: u32,
105         pub ru_majflt: c_long,
106         #[cfg(all(target_arch = "x86_64", target_pointer_width = "32"))]
107         __pad6: u32,
108         pub ru_nswap: c_long,
109         #[cfg(all(target_arch = "x86_64", target_pointer_width = "32"))]
110         __pad7: u32,
111         pub ru_inblock: c_long,
112         #[cfg(all(target_arch = "x86_64", target_pointer_width = "32"))]
113         __pad8: u32,
114         pub ru_oublock: c_long,
115         #[cfg(all(target_arch = "x86_64", target_pointer_width = "32"))]
116         __pad9: u32,
117         pub ru_msgsnd: c_long,
118         #[cfg(all(target_arch = "x86_64", target_pointer_width = "32"))]
119         __pad10: u32,
120         pub ru_msgrcv: c_long,
121         #[cfg(all(target_arch = "x86_64", target_pointer_width = "32"))]
122         __pad11: u32,
123         pub ru_nsignals: c_long,
124         #[cfg(all(target_arch = "x86_64", target_pointer_width = "32"))]
125         __pad12: u32,
126         pub ru_nvcsw: c_long,
127         #[cfg(all(target_arch = "x86_64", target_pointer_width = "32"))]
128         __pad13: u32,
129         pub ru_nivcsw: c_long,
130         #[cfg(all(target_arch = "x86_64", target_pointer_width = "32"))]
131         __pad14: u32,
132 
133         #[cfg(any(target_env = "musl", target_env = "ohos", target_os = "emscripten"))]
134         __reserved: [c_long; 16],
135     }
136 
137     pub struct ipv6_mreq {
138         pub ipv6mr_multiaddr: in6_addr,
139         #[cfg(target_os = "android")]
140         pub ipv6mr_interface: ::c_int,
141         #[cfg(not(target_os = "android"))]
142         pub ipv6mr_interface: ::c_uint,
143     }
144 
145     pub struct hostent {
146         pub h_name: *mut ::c_char,
147         pub h_aliases: *mut *mut ::c_char,
148         pub h_addrtype: ::c_int,
149         pub h_length: ::c_int,
150         pub h_addr_list: *mut *mut ::c_char,
151     }
152 
153     pub struct iovec {
154         pub iov_base: *mut ::c_void,
155         pub iov_len: ::size_t,
156     }
157 
158     pub struct pollfd {
159         pub fd: ::c_int,
160         pub events: ::c_short,
161         pub revents: ::c_short,
162     }
163 
164     pub struct winsize {
165         pub ws_row: ::c_ushort,
166         pub ws_col: ::c_ushort,
167         pub ws_xpixel: ::c_ushort,
168         pub ws_ypixel: ::c_ushort,
169     }
170 
171     pub struct linger {
172         pub l_onoff: ::c_int,
173         pub l_linger: ::c_int,
174     }
175 
176     pub struct sigval {
177         // Actually a union of an int and a void*
178         pub sival_ptr: *mut ::c_void
179     }
180 
181     // <sys/time.h>
182     pub struct itimerval {
183         pub it_interval: ::timeval,
184         pub it_value: ::timeval,
185     }
186 
187     // <sys/times.h>
188     pub struct tms {
189         pub tms_utime: ::clock_t,
190         pub tms_stime: ::clock_t,
191         pub tms_cutime: ::clock_t,
192         pub tms_cstime: ::clock_t,
193     }
194 
195     pub struct servent {
196         pub s_name: *mut ::c_char,
197         pub s_aliases: *mut *mut ::c_char,
198         pub s_port: ::c_int,
199         pub s_proto: *mut ::c_char,
200     }
201 
202     pub struct protoent {
203         pub p_name: *mut ::c_char,
204         pub p_aliases: *mut *mut ::c_char,
205         pub p_proto: ::c_int,
206     }
207 }
208 
209 pub const INT_MIN: c_int = -2147483648;
210 pub const INT_MAX: c_int = 2147483647;
211 
212 pub const SIG_DFL: sighandler_t = 0 as sighandler_t;
213 pub const SIG_IGN: sighandler_t = 1 as sighandler_t;
214 pub const SIG_ERR: sighandler_t = !0 as sighandler_t;
215 cfg_if! {
216     if #[cfg(not(target_os = "nto"))] {
217         pub const DT_UNKNOWN: u8 = 0;
218         pub const DT_FIFO: u8 = 1;
219         pub const DT_CHR: u8 = 2;
220         pub const DT_DIR: u8 = 4;
221         pub const DT_BLK: u8 = 6;
222         pub const DT_REG: u8 = 8;
223         pub const DT_LNK: u8 = 10;
224         pub const DT_SOCK: u8 = 12;
225     }
226 }
227 cfg_if! {
228     if #[cfg(not(target_os = "redox"))] {
229         pub const FD_CLOEXEC: ::c_int = 0x1;
230     }
231 }
232 
233 cfg_if! {
234     if #[cfg(not(target_os = "nto"))]
235     {
236         pub const USRQUOTA: ::c_int = 0;
237         pub const GRPQUOTA: ::c_int = 1;
238     }
239 }
240 pub const SIGIOT: ::c_int = 6;
241 
242 pub const S_ISUID: ::mode_t = 0x800;
243 pub const S_ISGID: ::mode_t = 0x400;
244 pub const S_ISVTX: ::mode_t = 0x200;
245 
246 cfg_if! {
247     if #[cfg(not(any(target_os = "haiku", target_os = "illumos",
248                      target_os = "solaris")))] {
249         pub const IF_NAMESIZE: ::size_t = 16;
250         pub const IFNAMSIZ: ::size_t = IF_NAMESIZE;
251     }
252 }
253 
254 pub const LOG_EMERG: ::c_int = 0;
255 pub const LOG_ALERT: ::c_int = 1;
256 pub const LOG_CRIT: ::c_int = 2;
257 pub const LOG_ERR: ::c_int = 3;
258 pub const LOG_WARNING: ::c_int = 4;
259 pub const LOG_NOTICE: ::c_int = 5;
260 pub const LOG_INFO: ::c_int = 6;
261 pub const LOG_DEBUG: ::c_int = 7;
262 
263 pub const LOG_KERN: ::c_int = 0;
264 pub const LOG_USER: ::c_int = 1 << 3;
265 pub const LOG_MAIL: ::c_int = 2 << 3;
266 pub const LOG_DAEMON: ::c_int = 3 << 3;
267 pub const LOG_AUTH: ::c_int = 4 << 3;
268 pub const LOG_SYSLOG: ::c_int = 5 << 3;
269 pub const LOG_LPR: ::c_int = 6 << 3;
270 pub const LOG_NEWS: ::c_int = 7 << 3;
271 pub const LOG_UUCP: ::c_int = 8 << 3;
272 pub const LOG_LOCAL0: ::c_int = 16 << 3;
273 pub const LOG_LOCAL1: ::c_int = 17 << 3;
274 pub const LOG_LOCAL2: ::c_int = 18 << 3;
275 pub const LOG_LOCAL3: ::c_int = 19 << 3;
276 pub const LOG_LOCAL4: ::c_int = 20 << 3;
277 pub const LOG_LOCAL5: ::c_int = 21 << 3;
278 pub const LOG_LOCAL6: ::c_int = 22 << 3;
279 pub const LOG_LOCAL7: ::c_int = 23 << 3;
280 
281 cfg_if! {
282     if #[cfg(not(target_os = "haiku"))] {
283         pub const LOG_PID: ::c_int = 0x01;
284         pub const LOG_CONS: ::c_int = 0x02;
285         pub const LOG_ODELAY: ::c_int = 0x04;
286         pub const LOG_NDELAY: ::c_int = 0x08;
287         pub const LOG_NOWAIT: ::c_int = 0x10;
288     }
289 }
290 pub const LOG_PRIMASK: ::c_int = 7;
291 pub const LOG_FACMASK: ::c_int = 0x3f8;
292 
293 cfg_if! {
294     if #[cfg(not(target_os = "nto"))]
295     {
296         pub const PRIO_MIN: ::c_int = -20;
297         pub const PRIO_MAX: ::c_int = 20;
298     }
299 }
300 pub const IPPROTO_ICMP: ::c_int = 1;
301 pub const IPPROTO_ICMPV6: ::c_int = 58;
302 pub const IPPROTO_TCP: ::c_int = 6;
303 pub const IPPROTO_UDP: ::c_int = 17;
304 pub const IPPROTO_IP: ::c_int = 0;
305 pub const IPPROTO_IPV6: ::c_int = 41;
306 
307 pub const INADDR_LOOPBACK: in_addr_t = 2130706433;
308 pub const INADDR_ANY: in_addr_t = 0;
309 pub const INADDR_BROADCAST: in_addr_t = 4294967295;
310 pub const INADDR_NONE: in_addr_t = 4294967295;
311 
312 pub const ARPOP_REQUEST: u16 = 1;
313 pub const ARPOP_REPLY: u16 = 2;
314 
315 pub const ATF_COM: ::c_int = 0x02;
316 pub const ATF_PERM: ::c_int = 0x04;
317 pub const ATF_PUBL: ::c_int = 0x08;
318 pub const ATF_USETRAILERS: ::c_int = 0x10;
319 
320 cfg_if! {
321     if #[cfg(any(target_os = "l4re", target_os = "espidf"))] {
322         // required libraries for L4Re and the ESP-IDF framework are linked externally, ATM
323     } else if #[cfg(feature = "std")] {
324         // cargo build, don't pull in anything extra as the libstd dep
325         // already pulls in all libs.
326     } else if #[cfg(all(target_os = "linux",
327                         any(target_env = "gnu", target_env = "uclibc"),
328                         feature = "rustc-dep-of-std"))] {
329         #[link(name = "util", kind = "static", modifiers = "-bundle",
330             cfg(target_feature = "crt-static"))]
331         #[link(name = "rt", kind = "static", modifiers = "-bundle",
332             cfg(target_feature = "crt-static"))]
333         #[link(name = "pthread", kind = "static", modifiers = "-bundle",
334             cfg(target_feature = "crt-static"))]
335         #[link(name = "m", kind = "static", modifiers = "-bundle",
336             cfg(target_feature = "crt-static"))]
337         #[link(name = "dl", kind = "static", modifiers = "-bundle",
338             cfg(target_feature = "crt-static"))]
339         #[link(name = "c", kind = "static", modifiers = "-bundle",
340             cfg(target_feature = "crt-static"))]
341         #[link(name = "gcc_eh", kind = "static", modifiers = "-bundle",
342             cfg(target_feature = "crt-static"))]
343         #[link(name = "gcc", kind = "static", modifiers = "-bundle",
344             cfg(target_feature = "crt-static"))]
345         #[link(name = "c", kind = "static", modifiers = "-bundle",
346             cfg(target_feature = "crt-static"))]
347         #[link(name = "util", cfg(not(target_feature = "crt-static")))]
348         #[link(name = "rt", cfg(not(target_feature = "crt-static")))]
349         #[link(name = "pthread", cfg(not(target_feature = "crt-static")))]
350         #[link(name = "m", cfg(not(target_feature = "crt-static")))]
351         #[link(name = "dl", cfg(not(target_feature = "crt-static")))]
352         #[link(name = "c", cfg(not(target_feature = "crt-static")))]
353         extern {}
354     } else if #[cfg(any(target_env = "musl", target_env = "ohos"))] {
355         #[cfg_attr(feature = "rustc-dep-of-std",
356                    link(name = "c", kind = "static", modifiers = "-bundle",
357                         cfg(target_feature = "crt-static")))]
358         #[cfg_attr(feature = "rustc-dep-of-std",
359                    link(name = "c", cfg(not(target_feature = "crt-static"))))]
360         extern {}
361     } else if #[cfg(target_os = "emscripten")] {
362         #[link(name = "c")]
363         extern {}
364     } else if #[cfg(all(target_os = "android", feature = "rustc-dep-of-std"))] {
365         #[link(name = "c", kind = "static", modifiers = "-bundle",
366             cfg(target_feature = "crt-static"))]
367         #[link(name = "m", kind = "static", modifiers = "-bundle",
368             cfg(target_feature = "crt-static"))]
369         #[link(name = "m", cfg(not(target_feature = "crt-static")))]
370         #[link(name = "c", cfg(not(target_feature = "crt-static")))]
371         extern {}
372     } else if #[cfg(any(target_os = "macos",
373                         target_os = "ios",
374                         target_os = "tvos",
375                         target_os = "watchos",
376                         target_os = "android",
377                         target_os = "openbsd",
378                         target_os = "nto",
379                     ))] {
380         #[link(name = "c")]
381         #[link(name = "m")]
382         extern {}
383     } else if #[cfg(target_os = "haiku")] {
384         #[link(name = "root")]
385         #[link(name = "network")]
386         extern {}
387     } else if #[cfg(target_env = "newlib")] {
388         #[link(name = "c")]
389         #[link(name = "m")]
390         extern {}
391     } else if #[cfg(target_env = "illumos")] {
392         #[link(name = "c")]
393         #[link(name = "m")]
394         extern {}
395     } else if #[cfg(target_os = "redox")] {
396         #[cfg_attr(feature = "rustc-dep-of-std",
397                    link(name = "c", kind = "static", modifiers = "-bundle",
398                         cfg(target_feature = "crt-static")))]
399         #[cfg_attr(feature = "rustc-dep-of-std",
400                    link(name = "c", cfg(not(target_feature = "crt-static"))))]
401         extern {}
402     } else if #[cfg(target_env = "aix")] {
403         #[link(name = "c")]
404         #[link(name = "m")]
405         #[link(name = "bsd")]
406         #[link(name = "pthread")]
407         extern {}
408     } else {
409         #[link(name = "c")]
410         #[link(name = "m")]
411         #[link(name = "rt")]
412         #[link(name = "pthread")]
413         extern {}
414     }
415 }
416 
417 #[cfg_attr(feature = "extra_traits", derive(Debug))]
418 pub enum FILE {}
419 impl ::Copy for FILE {}
420 impl ::Clone for FILE {
421     fn clone(&self) -> FILE {
422         *self
423     }
424 }
425 #[cfg_attr(feature = "extra_traits", derive(Debug))]
426 pub enum fpos_t {} // FIXME: fill this out with a struct
427 impl ::Copy for fpos_t {}
428 impl ::Clone for fpos_t {
429     fn clone(&self) -> fpos_t {
430         *self
431     }
432 }
433 
434 extern "C" {
435     pub fn isalnum(c: c_int) -> c_int;
436     pub fn isalpha(c: c_int) -> c_int;
437     pub fn iscntrl(c: c_int) -> c_int;
438     pub fn isdigit(c: c_int) -> c_int;
439     pub fn isgraph(c: c_int) -> c_int;
440     pub fn islower(c: c_int) -> c_int;
441     pub fn isprint(c: c_int) -> c_int;
442     pub fn ispunct(c: c_int) -> c_int;
443     pub fn isspace(c: c_int) -> c_int;
444     pub fn isupper(c: c_int) -> c_int;
445     pub fn isxdigit(c: c_int) -> c_int;
446     pub fn isblank(c: c_int) -> c_int;
447     pub fn tolower(c: c_int) -> c_int;
448     pub fn toupper(c: c_int) -> c_int;
449     pub fn qsort(
450         base: *mut c_void,
451         num: size_t,
452         size: size_t,
453         compar: ::Option<unsafe extern "C" fn(*const c_void, *const c_void) -> c_int>,
454     );
455     pub fn bsearch(
456         key: *const c_void,
457         base: *const c_void,
458         num: size_t,
459         size: size_t,
460         compar: ::Option<unsafe extern "C" fn(*const c_void, *const c_void) -> c_int>,
461     ) -> *mut c_void;
462     #[cfg_attr(
463         all(target_os = "macos", target_arch = "x86"),
464         link_name = "fopen$UNIX2003"
465     )]
466     pub fn fopen(filename: *const c_char, mode: *const c_char) -> *mut FILE;
467     #[cfg_attr(
468         all(target_os = "macos", target_arch = "x86"),
469         link_name = "freopen$UNIX2003"
470     )]
471     pub fn freopen(filename: *const c_char, mode: *const c_char, file: *mut FILE) -> *mut FILE;
472 
473     pub fn fflush(file: *mut FILE) -> c_int;
474     pub fn fclose(file: *mut FILE) -> c_int;
475     pub fn remove(filename: *const c_char) -> c_int;
476     pub fn rename(oldname: *const c_char, newname: *const c_char) -> c_int;
477     pub fn tmpfile() -> *mut FILE;
478     pub fn setvbuf(stream: *mut FILE, buffer: *mut c_char, mode: c_int, size: size_t) -> c_int;
479     pub fn setbuf(stream: *mut FILE, buf: *mut c_char);
480     pub fn getchar() -> c_int;
481     pub fn putchar(c: c_int) -> c_int;
482     pub fn fgetc(stream: *mut FILE) -> c_int;
483     pub fn fgets(buf: *mut c_char, n: c_int, stream: *mut FILE) -> *mut c_char;
484     pub fn fputc(c: c_int, stream: *mut FILE) -> c_int;
485     #[cfg_attr(
486         all(target_os = "macos", target_arch = "x86"),
487         link_name = "fputs$UNIX2003"
488     )]
489     pub fn fputs(s: *const c_char, stream: *mut FILE) -> c_int;
490     pub fn puts(s: *const c_char) -> c_int;
491     pub fn ungetc(c: c_int, stream: *mut FILE) -> c_int;
492     pub fn fread(ptr: *mut c_void, size: size_t, nobj: size_t, stream: *mut FILE) -> size_t;
493     #[cfg_attr(
494         all(target_os = "macos", target_arch = "x86"),
495         link_name = "fwrite$UNIX2003"
496     )]
497     pub fn fwrite(ptr: *const c_void, size: size_t, nobj: size_t, stream: *mut FILE) -> size_t;
498     pub fn fseek(stream: *mut FILE, offset: c_long, whence: c_int) -> c_int;
499     pub fn ftell(stream: *mut FILE) -> c_long;
500     pub fn rewind(stream: *mut FILE);
501     #[cfg_attr(target_os = "netbsd", link_name = "__fgetpos50")]
502     pub fn fgetpos(stream: *mut FILE, ptr: *mut fpos_t) -> c_int;
503     #[cfg_attr(target_os = "netbsd", link_name = "__fsetpos50")]
504     pub fn fsetpos(stream: *mut FILE, ptr: *const fpos_t) -> c_int;
505     pub fn feof(stream: *mut FILE) -> c_int;
506     pub fn ferror(stream: *mut FILE) -> c_int;
507     pub fn clearerr(stream: *mut FILE);
508     pub fn perror(s: *const c_char);
509     pub fn atof(s: *const c_char) -> c_double;
510     pub fn atoi(s: *const c_char) -> c_int;
511     pub fn atol(s: *const c_char) -> c_long;
512     pub fn atoll(s: *const c_char) -> c_longlong;
513     #[cfg_attr(
514         all(target_os = "macos", target_arch = "x86"),
515         link_name = "strtod$UNIX2003"
516     )]
517     pub fn strtod(s: *const c_char, endp: *mut *mut c_char) -> c_double;
518     pub fn strtof(s: *const c_char, endp: *mut *mut c_char) -> c_float;
519     pub fn strtol(s: *const c_char, endp: *mut *mut c_char, base: c_int) -> c_long;
520     pub fn strtoll(s: *const c_char, endp: *mut *mut c_char, base: c_int) -> c_longlong;
521     pub fn strtoul(s: *const c_char, endp: *mut *mut c_char, base: c_int) -> c_ulong;
522     pub fn strtoull(s: *const c_char, endp: *mut *mut c_char, base: c_int) -> c_ulonglong;
523     pub fn calloc(nobj: size_t, size: size_t) -> *mut c_void;
524     pub fn malloc(size: size_t) -> *mut c_void;
525     pub fn realloc(p: *mut c_void, size: size_t) -> *mut c_void;
526     pub fn free(p: *mut c_void);
527     pub fn abort() -> !;
528     pub fn exit(status: c_int) -> !;
529     pub fn _exit(status: c_int) -> !;
530     #[cfg_attr(
531         all(target_os = "macos", target_arch = "x86"),
532         link_name = "system$UNIX2003"
533     )]
534     pub fn system(s: *const c_char) -> c_int;
535     pub fn getenv(s: *const c_char) -> *mut c_char;
536 
537     pub fn strcpy(dst: *mut c_char, src: *const c_char) -> *mut c_char;
538     pub fn strncpy(dst: *mut c_char, src: *const c_char, n: size_t) -> *mut c_char;
539     pub fn stpcpy(dst: *mut c_char, src: *const c_char) -> *mut c_char;
540     pub fn strcat(s: *mut c_char, ct: *const c_char) -> *mut c_char;
541     pub fn strncat(s: *mut c_char, ct: *const c_char, n: size_t) -> *mut c_char;
542     pub fn strcmp(cs: *const c_char, ct: *const c_char) -> c_int;
543     pub fn strncmp(cs: *const c_char, ct: *const c_char, n: size_t) -> c_int;
544     pub fn strcoll(cs: *const c_char, ct: *const c_char) -> c_int;
545     pub fn strchr(cs: *const c_char, c: c_int) -> *mut c_char;
546     pub fn strrchr(cs: *const c_char, c: c_int) -> *mut c_char;
547     pub fn strspn(cs: *const c_char, ct: *const c_char) -> size_t;
548     pub fn strcspn(cs: *const c_char, ct: *const c_char) -> size_t;
549     pub fn strdup(cs: *const c_char) -> *mut c_char;
550     pub fn strndup(cs: *const c_char, n: size_t) -> *mut c_char;
551     pub fn strpbrk(cs: *const c_char, ct: *const c_char) -> *mut c_char;
552     pub fn strstr(cs: *const c_char, ct: *const c_char) -> *mut c_char;
553     pub fn strcasecmp(s1: *const c_char, s2: *const c_char) -> c_int;
554     pub fn strncasecmp(s1: *const c_char, s2: *const c_char, n: size_t) -> c_int;
555     pub fn strlen(cs: *const c_char) -> size_t;
556     pub fn strnlen(cs: *const c_char, maxlen: size_t) -> size_t;
557     #[cfg_attr(
558         all(target_os = "macos", target_arch = "x86"),
559         link_name = "strerror$UNIX2003"
560     )]
561     pub fn strerror(n: c_int) -> *mut c_char;
562     pub fn strtok(s: *mut c_char, t: *const c_char) -> *mut c_char;
563     pub fn strtok_r(s: *mut c_char, t: *const c_char, p: *mut *mut c_char) -> *mut c_char;
564     pub fn strxfrm(s: *mut c_char, ct: *const c_char, n: size_t) -> size_t;
565     pub fn strsignal(sig: c_int) -> *mut c_char;
566     pub fn wcslen(buf: *const wchar_t) -> size_t;
567     pub fn wcstombs(dest: *mut c_char, src: *const wchar_t, n: size_t) -> ::size_t;
568 
569     pub fn memchr(cx: *const c_void, c: c_int, n: size_t) -> *mut c_void;
570     pub fn wmemchr(cx: *const wchar_t, c: wchar_t, n: size_t) -> *mut wchar_t;
571     pub fn memcmp(cx: *const c_void, ct: *const c_void, n: size_t) -> c_int;
572     pub fn memcpy(dest: *mut c_void, src: *const c_void, n: size_t) -> *mut c_void;
573     pub fn memmove(dest: *mut c_void, src: *const c_void, n: size_t) -> *mut c_void;
574     pub fn memset(dest: *mut c_void, c: c_int, n: size_t) -> *mut c_void;
575 }
576 
577 extern "C" {
578     #[cfg_attr(target_os = "netbsd", link_name = "__getpwnam50")]
579     pub fn getpwnam(name: *const ::c_char) -> *mut passwd;
580     #[cfg_attr(target_os = "netbsd", link_name = "__getpwuid50")]
581     pub fn getpwuid(uid: ::uid_t) -> *mut passwd;
582 
583     pub fn fprintf(stream: *mut ::FILE, format: *const ::c_char, ...) -> ::c_int;
584     pub fn printf(format: *const ::c_char, ...) -> ::c_int;
585     pub fn snprintf(s: *mut ::c_char, n: ::size_t, format: *const ::c_char, ...) -> ::c_int;
586     pub fn sprintf(s: *mut ::c_char, format: *const ::c_char, ...) -> ::c_int;
587     #[cfg_attr(
588         all(target_os = "linux", not(target_env = "uclibc")),
589         link_name = "__isoc99_fscanf"
590     )]
591     pub fn fscanf(stream: *mut ::FILE, format: *const ::c_char, ...) -> ::c_int;
592     #[cfg_attr(
593         all(target_os = "linux", not(target_env = "uclibc")),
594         link_name = "__isoc99_scanf"
595     )]
596     pub fn scanf(format: *const ::c_char, ...) -> ::c_int;
597     #[cfg_attr(
598         all(target_os = "linux", not(target_env = "uclibc")),
599         link_name = "__isoc99_sscanf"
600     )]
601     pub fn sscanf(s: *const ::c_char, format: *const ::c_char, ...) -> ::c_int;
602     pub fn getchar_unlocked() -> ::c_int;
603     pub fn putchar_unlocked(c: ::c_int) -> ::c_int;
604 
605     #[cfg(not(all(
606         libc_cfg_target_vendor,
607         target_arch = "powerpc",
608         target_vendor = "nintendo"
609     )))]
610     #[cfg_attr(target_os = "netbsd", link_name = "__socket30")]
611     #[cfg_attr(target_os = "illumos", link_name = "__xnet_socket")]
612     #[cfg_attr(target_os = "espidf", link_name = "lwip_socket")]
613     pub fn socket(domain: ::c_int, ty: ::c_int, protocol: ::c_int) -> ::c_int;
614     #[cfg(not(all(
615         libc_cfg_target_vendor,
616         target_arch = "powerpc",
617         target_vendor = "nintendo"
618     )))]
619     #[cfg_attr(
620         all(target_os = "macos", target_arch = "x86"),
621         link_name = "connect$UNIX2003"
622     )]
623     #[cfg_attr(target_os = "illumos", link_name = "__xnet_connect")]
624     #[cfg_attr(target_os = "espidf", link_name = "lwip_connect")]
625     pub fn connect(socket: ::c_int, address: *const sockaddr, len: socklen_t) -> ::c_int;
626     #[cfg_attr(
627         all(target_os = "macos", target_arch = "x86"),
628         link_name = "listen$UNIX2003"
629     )]
630     #[cfg_attr(target_os = "espidf", link_name = "lwip_listen")]
631     pub fn listen(socket: ::c_int, backlog: ::c_int) -> ::c_int;
632     #[cfg(not(all(
633         libc_cfg_target_vendor,
634         target_arch = "powerpc",
635         target_vendor = "nintendo"
636     )))]
637     #[cfg_attr(
638         all(target_os = "macos", target_arch = "x86"),
639         link_name = "accept$UNIX2003"
640     )]
641     #[cfg_attr(target_os = "espidf", link_name = "lwip_accept")]
642     pub fn accept(socket: ::c_int, address: *mut sockaddr, address_len: *mut socklen_t) -> ::c_int;
643     #[cfg(not(all(
644         libc_cfg_target_vendor,
645         target_arch = "powerpc",
646         target_vendor = "nintendo"
647     )))]
648     #[cfg_attr(
649         all(target_os = "macos", target_arch = "x86"),
650         link_name = "getpeername$UNIX2003"
651     )]
652     #[cfg_attr(target_os = "espidf", link_name = "lwip_getpeername")]
653     pub fn getpeername(
654         socket: ::c_int,
655         address: *mut sockaddr,
656         address_len: *mut socklen_t,
657     ) -> ::c_int;
658     #[cfg(not(all(
659         libc_cfg_target_vendor,
660         target_arch = "powerpc",
661         target_vendor = "nintendo"
662     )))]
663     #[cfg_attr(
664         all(target_os = "macos", target_arch = "x86"),
665         link_name = "getsockname$UNIX2003"
666     )]
667     #[cfg_attr(target_os = "espidf", link_name = "lwip_getsockname")]
668     pub fn getsockname(
669         socket: ::c_int,
670         address: *mut sockaddr,
671         address_len: *mut socklen_t,
672     ) -> ::c_int;
673     #[cfg_attr(target_os = "espidf", link_name = "lwip_setsockopt")]
674     pub fn setsockopt(
675         socket: ::c_int,
676         level: ::c_int,
677         name: ::c_int,
678         value: *const ::c_void,
679         option_len: socklen_t,
680     ) -> ::c_int;
681     #[cfg(not(all(
682         libc_cfg_target_vendor,
683         target_arch = "powerpc",
684         target_vendor = "nintendo"
685     )))]
686     #[cfg_attr(
687         all(target_os = "macos", target_arch = "x86"),
688         link_name = "sendto$UNIX2003"
689     )]
690     #[cfg_attr(target_os = "illumos", link_name = "__xnet_sendto")]
691     #[cfg_attr(target_os = "espidf", link_name = "lwip_sendto")]
692     pub fn sendto(
693         socket: ::c_int,
694         buf: *const ::c_void,
695         len: ::size_t,
696         flags: ::c_int,
697         addr: *const sockaddr,
698         addrlen: socklen_t,
699     ) -> ::ssize_t;
700     #[cfg_attr(target_os = "espidf", link_name = "lwip_shutdown")]
701     pub fn shutdown(socket: ::c_int, how: ::c_int) -> ::c_int;
702 
703     #[cfg_attr(
704         all(target_os = "macos", target_arch = "x86"),
705         link_name = "chmod$UNIX2003"
706     )]
707     pub fn chmod(path: *const c_char, mode: mode_t) -> ::c_int;
708     #[cfg_attr(
709         all(target_os = "macos", target_arch = "x86"),
710         link_name = "fchmod$UNIX2003"
711     )]
712     pub fn fchmod(fd: ::c_int, mode: mode_t) -> ::c_int;
713 
714     #[cfg_attr(
715         all(target_os = "macos", not(target_arch = "aarch64")),
716         link_name = "fstat$INODE64"
717     )]
718     #[cfg_attr(target_os = "netbsd", link_name = "__fstat50")]
719     #[cfg_attr(
720         all(target_os = "freebsd", any(freebsd11, freebsd10)),
721         link_name = "fstat@FBSD_1.0"
722     )]
723     pub fn fstat(fildes: ::c_int, buf: *mut stat) -> ::c_int;
724 
725     pub fn mkdir(path: *const c_char, mode: mode_t) -> ::c_int;
726 
727     #[cfg_attr(
728         all(target_os = "macos", not(target_arch = "aarch64")),
729         link_name = "stat$INODE64"
730     )]
731     #[cfg_attr(target_os = "netbsd", link_name = "__stat50")]
732     #[cfg_attr(
733         all(target_os = "freebsd", any(freebsd11, freebsd10)),
734         link_name = "stat@FBSD_1.0"
735     )]
736     pub fn stat(path: *const c_char, buf: *mut stat) -> ::c_int;
737 
738     pub fn pclose(stream: *mut ::FILE) -> ::c_int;
739     #[cfg_attr(
740         all(target_os = "macos", target_arch = "x86"),
741         link_name = "fdopen$UNIX2003"
742     )]
743     pub fn fdopen(fd: ::c_int, mode: *const c_char) -> *mut ::FILE;
744     pub fn fileno(stream: *mut ::FILE) -> ::c_int;
745 
746     #[cfg_attr(
747         all(target_os = "macos", target_arch = "x86"),
748         link_name = "open$UNIX2003"
749     )]
750     pub fn open(path: *const c_char, oflag: ::c_int, ...) -> ::c_int;
751     #[cfg_attr(
752         all(target_os = "macos", target_arch = "x86"),
753         link_name = "creat$UNIX2003"
754     )]
755     pub fn creat(path: *const c_char, mode: mode_t) -> ::c_int;
756     #[cfg_attr(
757         all(target_os = "macos", target_arch = "x86"),
758         link_name = "fcntl$UNIX2003"
759     )]
760     pub fn fcntl(fd: ::c_int, cmd: ::c_int, ...) -> ::c_int;
761 
762     #[cfg_attr(
763         all(target_os = "macos", target_arch = "x86_64"),
764         link_name = "opendir$INODE64"
765     )]
766     #[cfg_attr(
767         all(target_os = "macos", target_arch = "x86"),
768         link_name = "opendir$INODE64$UNIX2003"
769     )]
770     #[cfg_attr(target_os = "netbsd", link_name = "__opendir30")]
771     pub fn opendir(dirname: *const c_char) -> *mut ::DIR;
772 
773     #[cfg_attr(
774         all(target_os = "macos", not(target_arch = "aarch64")),
775         link_name = "readdir$INODE64"
776     )]
777     #[cfg_attr(target_os = "netbsd", link_name = "__readdir30")]
778     #[cfg_attr(
779         all(target_os = "freebsd", any(freebsd11, freebsd10)),
780         link_name = "readdir@FBSD_1.0"
781     )]
782     pub fn readdir(dirp: *mut ::DIR) -> *mut ::dirent;
783     #[cfg_attr(
784         all(target_os = "macos", target_arch = "x86"),
785         link_name = "closedir$UNIX2003"
786     )]
787     pub fn closedir(dirp: *mut ::DIR) -> ::c_int;
788     #[cfg_attr(
789         all(target_os = "macos", target_arch = "x86_64"),
790         link_name = "rewinddir$INODE64"
791     )]
792     #[cfg_attr(
793         all(target_os = "macos", target_arch = "x86"),
794         link_name = "rewinddir$INODE64$UNIX2003"
795     )]
796     pub fn rewinddir(dirp: *mut ::DIR);
797 
798     pub fn fchmodat(
799         dirfd: ::c_int,
800         pathname: *const ::c_char,
801         mode: ::mode_t,
802         flags: ::c_int,
803     ) -> ::c_int;
804     pub fn fchown(fd: ::c_int, owner: ::uid_t, group: ::gid_t) -> ::c_int;
805     pub fn fchownat(
806         dirfd: ::c_int,
807         pathname: *const ::c_char,
808         owner: ::uid_t,
809         group: ::gid_t,
810         flags: ::c_int,
811     ) -> ::c_int;
812     #[cfg_attr(
813         all(target_os = "macos", not(target_arch = "aarch64")),
814         link_name = "fstatat$INODE64"
815     )]
816     #[cfg_attr(
817         all(target_os = "freebsd", any(freebsd11, freebsd10)),
818         link_name = "fstatat@FBSD_1.1"
819     )]
820     pub fn fstatat(
821         dirfd: ::c_int,
822         pathname: *const ::c_char,
823         buf: *mut stat,
824         flags: ::c_int,
825     ) -> ::c_int;
826     pub fn linkat(
827         olddirfd: ::c_int,
828         oldpath: *const ::c_char,
829         newdirfd: ::c_int,
830         newpath: *const ::c_char,
831         flags: ::c_int,
832     ) -> ::c_int;
833     pub fn renameat(
834         olddirfd: ::c_int,
835         oldpath: *const ::c_char,
836         newdirfd: ::c_int,
837         newpath: *const ::c_char,
838     ) -> ::c_int;
839     pub fn symlinkat(
840         target: *const ::c_char,
841         newdirfd: ::c_int,
842         linkpath: *const ::c_char,
843     ) -> ::c_int;
844     pub fn unlinkat(dirfd: ::c_int, pathname: *const ::c_char, flags: ::c_int) -> ::c_int;
845 
846     pub fn access(path: *const c_char, amode: ::c_int) -> ::c_int;
847     pub fn alarm(seconds: ::c_uint) -> ::c_uint;
848     pub fn chdir(dir: *const c_char) -> ::c_int;
849     pub fn fchdir(dirfd: ::c_int) -> ::c_int;
850     pub fn chown(path: *const c_char, uid: uid_t, gid: gid_t) -> ::c_int;
851     #[cfg_attr(
852         all(target_os = "macos", target_arch = "x86"),
853         link_name = "lchown$UNIX2003"
854     )]
855     pub fn lchown(path: *const c_char, uid: uid_t, gid: gid_t) -> ::c_int;
856     #[cfg_attr(
857         all(target_os = "macos", target_arch = "x86"),
858         link_name = "close$NOCANCEL$UNIX2003"
859     )]
860     #[cfg_attr(
861         all(target_os = "macos", target_arch = "x86_64"),
862         link_name = "close$NOCANCEL"
863     )]
864     pub fn close(fd: ::c_int) -> ::c_int;
865     pub fn dup(fd: ::c_int) -> ::c_int;
866     pub fn dup2(src: ::c_int, dst: ::c_int) -> ::c_int;
867     pub fn execl(path: *const c_char, arg0: *const c_char, ...) -> ::c_int;
868     pub fn execle(path: *const ::c_char, arg0: *const ::c_char, ...) -> ::c_int;
869     pub fn execlp(file: *const ::c_char, arg0: *const ::c_char, ...) -> ::c_int;
870     pub fn execv(prog: *const c_char, argv: *const *const c_char) -> ::c_int;
871     pub fn execve(
872         prog: *const c_char,
873         argv: *const *const c_char,
874         envp: *const *const c_char,
875     ) -> ::c_int;
876     pub fn execvp(c: *const c_char, argv: *const *const c_char) -> ::c_int;
877     pub fn fork() -> pid_t;
878     pub fn fpathconf(filedes: ::c_int, name: ::c_int) -> c_long;
879     pub fn getcwd(buf: *mut c_char, size: ::size_t) -> *mut c_char;
880     pub fn getegid() -> gid_t;
881     pub fn geteuid() -> uid_t;
882     pub fn getgid() -> gid_t;
883     pub fn getgroups(ngroups_max: ::c_int, groups: *mut gid_t) -> ::c_int;
884     #[cfg_attr(target_os = "illumos", link_name = "getloginx")]
885     pub fn getlogin() -> *mut c_char;
886     #[cfg_attr(
887         all(target_os = "macos", target_arch = "x86"),
888         link_name = "getopt$UNIX2003"
889     )]
890     pub fn getopt(argc: ::c_int, argv: *const *mut c_char, optstr: *const c_char) -> ::c_int;
891     pub fn getpgid(pid: pid_t) -> pid_t;
892     pub fn getpgrp() -> pid_t;
893     pub fn getpid() -> pid_t;
894     pub fn getppid() -> pid_t;
895     pub fn getuid() -> uid_t;
896     pub fn isatty(fd: ::c_int) -> ::c_int;
897     pub fn link(src: *const c_char, dst: *const c_char) -> ::c_int;
898     pub fn lseek(fd: ::c_int, offset: off_t, whence: ::c_int) -> off_t;
899     pub fn pathconf(path: *const c_char, name: ::c_int) -> c_long;
900     pub fn pipe(fds: *mut ::c_int) -> ::c_int;
901     pub fn posix_memalign(memptr: *mut *mut ::c_void, align: ::size_t, size: ::size_t) -> ::c_int;
902     #[cfg_attr(
903         all(target_os = "macos", target_arch = "x86"),
904         link_name = "read$UNIX2003"
905     )]
906     pub fn read(fd: ::c_int, buf: *mut ::c_void, count: ::size_t) -> ::ssize_t;
907     pub fn rmdir(path: *const c_char) -> ::c_int;
908     pub fn seteuid(uid: uid_t) -> ::c_int;
909     pub fn setegid(gid: gid_t) -> ::c_int;
910     pub fn setgid(gid: gid_t) -> ::c_int;
911     pub fn setpgid(pid: pid_t, pgid: pid_t) -> ::c_int;
912     pub fn setsid() -> pid_t;
913     pub fn setuid(uid: uid_t) -> ::c_int;
914     pub fn setreuid(ruid: uid_t, euid: uid_t) -> ::c_int;
915     pub fn setregid(rgid: gid_t, egid: gid_t) -> ::c_int;
916     #[cfg_attr(
917         all(target_os = "macos", target_arch = "x86"),
918         link_name = "sleep$UNIX2003"
919     )]
920     pub fn sleep(secs: ::c_uint) -> ::c_uint;
921     #[cfg_attr(
922         all(target_os = "macos", target_arch = "x86"),
923         link_name = "nanosleep$UNIX2003"
924     )]
925     #[cfg_attr(target_os = "netbsd", link_name = "__nanosleep50")]
926     pub fn nanosleep(rqtp: *const timespec, rmtp: *mut timespec) -> ::c_int;
927     pub fn tcgetpgrp(fd: ::c_int) -> pid_t;
928     pub fn tcsetpgrp(fd: ::c_int, pgrp: ::pid_t) -> ::c_int;
929     pub fn ttyname(fd: ::c_int) -> *mut c_char;
930     #[cfg_attr(
931         all(target_os = "macos", target_arch = "x86"),
932         link_name = "ttyname_r$UNIX2003"
933     )]
934     #[cfg_attr(target_os = "illumos", link_name = "__posix_ttyname_r")]
935     pub fn ttyname_r(fd: ::c_int, buf: *mut c_char, buflen: ::size_t) -> ::c_int;
936     pub fn unlink(c: *const c_char) -> ::c_int;
937     #[cfg_attr(
938         all(target_os = "macos", target_arch = "x86"),
939         link_name = "wait$UNIX2003"
940     )]
941     pub fn wait(status: *mut ::c_int) -> pid_t;
942     #[cfg_attr(
943         all(target_os = "macos", target_arch = "x86"),
944         link_name = "waitpid$UNIX2003"
945     )]
946     pub fn waitpid(pid: pid_t, status: *mut ::c_int, options: ::c_int) -> pid_t;
947     #[cfg_attr(
948         all(target_os = "macos", target_arch = "x86"),
949         link_name = "write$UNIX2003"
950     )]
951     pub fn write(fd: ::c_int, buf: *const ::c_void, count: ::size_t) -> ::ssize_t;
952     #[cfg_attr(
953         all(target_os = "macos", target_arch = "x86"),
954         link_name = "pread$UNIX2003"
955     )]
956     pub fn pread(fd: ::c_int, buf: *mut ::c_void, count: ::size_t, offset: off_t) -> ::ssize_t;
957     #[cfg_attr(
958         all(target_os = "macos", target_arch = "x86"),
959         link_name = "pwrite$UNIX2003"
960     )]
961     pub fn pwrite(fd: ::c_int, buf: *const ::c_void, count: ::size_t, offset: off_t) -> ::ssize_t;
962     pub fn umask(mask: mode_t) -> mode_t;
963 
964     #[cfg_attr(target_os = "netbsd", link_name = "__utime50")]
965     pub fn utime(file: *const c_char, buf: *const utimbuf) -> ::c_int;
966 
967     #[cfg_attr(
968         all(target_os = "macos", target_arch = "x86"),
969         link_name = "kill$UNIX2003"
970     )]
971     pub fn kill(pid: pid_t, sig: ::c_int) -> ::c_int;
972     #[cfg_attr(
973         all(target_os = "macos", target_arch = "x86"),
974         link_name = "killpg$UNIX2003"
975     )]
976     pub fn killpg(pgrp: pid_t, sig: ::c_int) -> ::c_int;
977 
978     pub fn mlock(addr: *const ::c_void, len: ::size_t) -> ::c_int;
979     pub fn munlock(addr: *const ::c_void, len: ::size_t) -> ::c_int;
980     pub fn mlockall(flags: ::c_int) -> ::c_int;
981     pub fn munlockall() -> ::c_int;
982 
983     #[cfg_attr(
984         all(target_os = "macos", target_arch = "x86"),
985         link_name = "mmap$UNIX2003"
986     )]
987     pub fn mmap(
988         addr: *mut ::c_void,
989         len: ::size_t,
990         prot: ::c_int,
991         flags: ::c_int,
992         fd: ::c_int,
993         offset: off_t,
994     ) -> *mut ::c_void;
995     #[cfg_attr(
996         all(target_os = "macos", target_arch = "x86"),
997         link_name = "munmap$UNIX2003"
998     )]
999     pub fn munmap(addr: *mut ::c_void, len: ::size_t) -> ::c_int;
1000 
1001     pub fn if_nametoindex(ifname: *const c_char) -> ::c_uint;
1002     pub fn if_indextoname(ifindex: ::c_uint, ifname: *mut ::c_char) -> *mut ::c_char;
1003 
1004     #[cfg_attr(
1005         all(target_os = "macos", not(target_arch = "aarch64")),
1006         link_name = "lstat$INODE64"
1007     )]
1008     #[cfg_attr(target_os = "netbsd", link_name = "__lstat50")]
1009     #[cfg_attr(
1010         all(target_os = "freebsd", any(freebsd11, freebsd10)),
1011         link_name = "lstat@FBSD_1.0"
1012     )]
1013     pub fn lstat(path: *const c_char, buf: *mut stat) -> ::c_int;
1014 
1015     #[cfg_attr(
1016         all(target_os = "macos", target_arch = "x86"),
1017         link_name = "fsync$UNIX2003"
1018     )]
1019     pub fn fsync(fd: ::c_int) -> ::c_int;
1020 
1021     #[cfg_attr(
1022         all(target_os = "macos", target_arch = "x86"),
1023         link_name = "setenv$UNIX2003"
1024     )]
1025     pub fn setenv(name: *const c_char, val: *const c_char, overwrite: ::c_int) -> ::c_int;
1026     #[cfg_attr(
1027         all(target_os = "macos", target_arch = "x86"),
1028         link_name = "unsetenv$UNIX2003"
1029     )]
1030     #[cfg_attr(target_os = "netbsd", link_name = "__unsetenv13")]
1031     pub fn unsetenv(name: *const c_char) -> ::c_int;
1032 
1033     pub fn symlink(path1: *const c_char, path2: *const c_char) -> ::c_int;
1034 
1035     pub fn truncate(path: *const c_char, length: off_t) -> ::c_int;
1036     pub fn ftruncate(fd: ::c_int, length: off_t) -> ::c_int;
1037 
1038     pub fn signal(signum: ::c_int, handler: sighandler_t) -> sighandler_t;
1039 
1040     #[cfg_attr(target_os = "netbsd", link_name = "__getrusage50")]
1041     pub fn getrusage(resource: ::c_int, usage: *mut rusage) -> ::c_int;
1042 
1043     #[cfg_attr(
1044         any(
1045             target_os = "macos",
1046             target_os = "ios",
1047             target_os = "tvos",
1048             target_os = "watchos"
1049         ),
1050         link_name = "realpath$DARWIN_EXTSN"
1051     )]
1052     pub fn realpath(pathname: *const ::c_char, resolved: *mut ::c_char) -> *mut ::c_char;
1053 
1054     pub fn flock(fd: ::c_int, operation: ::c_int) -> ::c_int;
1055 
1056     #[cfg_attr(target_os = "netbsd", link_name = "__times13")]
1057     pub fn times(buf: *mut ::tms) -> ::clock_t;
1058 
1059     pub fn pthread_self() -> ::pthread_t;
1060     #[cfg_attr(
1061         all(target_os = "macos", target_arch = "x86"),
1062         link_name = "pthread_join$UNIX2003"
1063     )]
1064     pub fn pthread_join(native: ::pthread_t, value: *mut *mut ::c_void) -> ::c_int;
1065     pub fn pthread_exit(value: *mut ::c_void) -> !;
1066     pub fn pthread_attr_init(attr: *mut ::pthread_attr_t) -> ::c_int;
1067     pub fn pthread_attr_destroy(attr: *mut ::pthread_attr_t) -> ::c_int;
1068     pub fn pthread_attr_getstacksize(
1069         attr: *const ::pthread_attr_t,
1070         stacksize: *mut ::size_t,
1071     ) -> ::c_int;
1072     pub fn pthread_attr_setstacksize(attr: *mut ::pthread_attr_t, stack_size: ::size_t) -> ::c_int;
1073     pub fn pthread_attr_setdetachstate(attr: *mut ::pthread_attr_t, state: ::c_int) -> ::c_int;
1074     pub fn pthread_detach(thread: ::pthread_t) -> ::c_int;
1075     #[cfg_attr(target_os = "netbsd", link_name = "__libc_thr_yield")]
1076     pub fn sched_yield() -> ::c_int;
1077     pub fn pthread_key_create(
1078         key: *mut pthread_key_t,
1079         dtor: ::Option<unsafe extern "C" fn(*mut ::c_void)>,
1080     ) -> ::c_int;
1081     pub fn pthread_key_delete(key: pthread_key_t) -> ::c_int;
1082     pub fn pthread_getspecific(key: pthread_key_t) -> *mut ::c_void;
1083     pub fn pthread_setspecific(key: pthread_key_t, value: *const ::c_void) -> ::c_int;
1084     pub fn pthread_mutex_init(
1085         lock: *mut pthread_mutex_t,
1086         attr: *const pthread_mutexattr_t,
1087     ) -> ::c_int;
1088     pub fn pthread_mutex_destroy(lock: *mut pthread_mutex_t) -> ::c_int;
1089     pub fn pthread_mutex_lock(lock: *mut pthread_mutex_t) -> ::c_int;
1090     pub fn pthread_mutex_trylock(lock: *mut pthread_mutex_t) -> ::c_int;
1091     pub fn pthread_mutex_unlock(lock: *mut pthread_mutex_t) -> ::c_int;
1092 
1093     pub fn pthread_mutexattr_init(attr: *mut pthread_mutexattr_t) -> ::c_int;
1094     #[cfg_attr(
1095         all(target_os = "macos", target_arch = "x86"),
1096         link_name = "pthread_mutexattr_destroy$UNIX2003"
1097     )]
1098     pub fn pthread_mutexattr_destroy(attr: *mut pthread_mutexattr_t) -> ::c_int;
1099     pub fn pthread_mutexattr_settype(attr: *mut pthread_mutexattr_t, _type: ::c_int) -> ::c_int;
1100 
1101     #[cfg_attr(
1102         all(target_os = "macos", target_arch = "x86"),
1103         link_name = "pthread_cond_init$UNIX2003"
1104     )]
1105     pub fn pthread_cond_init(cond: *mut pthread_cond_t, attr: *const pthread_condattr_t)
1106         -> ::c_int;
1107     #[cfg_attr(
1108         all(target_os = "macos", target_arch = "x86"),
1109         link_name = "pthread_cond_wait$UNIX2003"
1110     )]
1111     pub fn pthread_cond_wait(cond: *mut pthread_cond_t, lock: *mut pthread_mutex_t) -> ::c_int;
1112     #[cfg_attr(
1113         all(target_os = "macos", target_arch = "x86"),
1114         link_name = "pthread_cond_timedwait$UNIX2003"
1115     )]
1116     pub fn pthread_cond_timedwait(
1117         cond: *mut pthread_cond_t,
1118         lock: *mut pthread_mutex_t,
1119         abstime: *const ::timespec,
1120     ) -> ::c_int;
1121     pub fn pthread_cond_signal(cond: *mut pthread_cond_t) -> ::c_int;
1122     pub fn pthread_cond_broadcast(cond: *mut pthread_cond_t) -> ::c_int;
1123     pub fn pthread_cond_destroy(cond: *mut pthread_cond_t) -> ::c_int;
1124     pub fn pthread_condattr_init(attr: *mut pthread_condattr_t) -> ::c_int;
1125     pub fn pthread_condattr_destroy(attr: *mut pthread_condattr_t) -> ::c_int;
1126     #[cfg_attr(
1127         all(target_os = "macos", target_arch = "x86"),
1128         link_name = "pthread_rwlock_init$UNIX2003"
1129     )]
1130     pub fn pthread_rwlock_init(
1131         lock: *mut pthread_rwlock_t,
1132         attr: *const pthread_rwlockattr_t,
1133     ) -> ::c_int;
1134     #[cfg_attr(
1135         all(target_os = "macos", target_arch = "x86"),
1136         link_name = "pthread_rwlock_destroy$UNIX2003"
1137     )]
1138     pub fn pthread_rwlock_destroy(lock: *mut pthread_rwlock_t) -> ::c_int;
1139     #[cfg_attr(
1140         all(target_os = "macos", target_arch = "x86"),
1141         link_name = "pthread_rwlock_rdlock$UNIX2003"
1142     )]
1143     pub fn pthread_rwlock_rdlock(lock: *mut pthread_rwlock_t) -> ::c_int;
1144     #[cfg_attr(
1145         all(target_os = "macos", target_arch = "x86"),
1146         link_name = "pthread_rwlock_tryrdlock$UNIX2003"
1147     )]
1148     pub fn pthread_rwlock_tryrdlock(lock: *mut pthread_rwlock_t) -> ::c_int;
1149     #[cfg_attr(
1150         all(target_os = "macos", target_arch = "x86"),
1151         link_name = "pthread_rwlock_wrlock$UNIX2003"
1152     )]
1153     pub fn pthread_rwlock_wrlock(lock: *mut pthread_rwlock_t) -> ::c_int;
1154     #[cfg_attr(
1155         all(target_os = "macos", target_arch = "x86"),
1156         link_name = "pthread_rwlock_trywrlock$UNIX2003"
1157     )]
1158     pub fn pthread_rwlock_trywrlock(lock: *mut pthread_rwlock_t) -> ::c_int;
1159     #[cfg_attr(
1160         all(target_os = "macos", target_arch = "x86"),
1161         link_name = "pthread_rwlock_unlock$UNIX2003"
1162     )]
1163     pub fn pthread_rwlock_unlock(lock: *mut pthread_rwlock_t) -> ::c_int;
1164     pub fn pthread_rwlockattr_init(attr: *mut pthread_rwlockattr_t) -> ::c_int;
1165     pub fn pthread_rwlockattr_destroy(attr: *mut pthread_rwlockattr_t) -> ::c_int;
1166 
1167     #[cfg_attr(target_os = "illumos", link_name = "__xnet_getsockopt")]
1168     #[cfg_attr(target_os = "espidf", link_name = "lwip_getsockopt")]
1169     pub fn getsockopt(
1170         sockfd: ::c_int,
1171         level: ::c_int,
1172         optname: ::c_int,
1173         optval: *mut ::c_void,
1174         optlen: *mut ::socklen_t,
1175     ) -> ::c_int;
1176     pub fn raise(signum: ::c_int) -> ::c_int;
1177 
1178     #[cfg_attr(target_os = "netbsd", link_name = "__utimes50")]
1179     pub fn utimes(filename: *const ::c_char, times: *const ::timeval) -> ::c_int;
1180     pub fn dlopen(filename: *const ::c_char, flag: ::c_int) -> *mut ::c_void;
1181     pub fn dlerror() -> *mut ::c_char;
1182     pub fn dlsym(handle: *mut ::c_void, symbol: *const ::c_char) -> *mut ::c_void;
1183     pub fn dlclose(handle: *mut ::c_void) -> ::c_int;
1184 
1185     #[cfg(not(all(
1186         libc_cfg_target_vendor,
1187         target_arch = "powerpc",
1188         target_vendor = "nintendo"
1189     )))]
1190     #[cfg_attr(target_os = "illumos", link_name = "__xnet_getaddrinfo")]
1191     #[cfg_attr(target_os = "espidf", link_name = "lwip_getaddrinfo")]
1192     pub fn getaddrinfo(
1193         node: *const c_char,
1194         service: *const c_char,
1195         hints: *const addrinfo,
1196         res: *mut *mut addrinfo,
1197     ) -> ::c_int;
1198     #[cfg(not(all(
1199         libc_cfg_target_vendor,
1200         target_arch = "powerpc",
1201         target_vendor = "nintendo"
1202     )))]
1203     #[cfg_attr(target_os = "espidf", link_name = "lwip_freeaddrinfo")]
1204     pub fn freeaddrinfo(res: *mut addrinfo);
1205     pub fn hstrerror(errcode: ::c_int) -> *const ::c_char;
1206     pub fn gai_strerror(errcode: ::c_int) -> *const ::c_char;
1207     #[cfg_attr(
1208         any(
1209             all(
1210                 target_os = "linux",
1211                 not(any(target_env = "musl", target_env = "ohos"))
1212             ),
1213             target_os = "freebsd",
1214             target_os = "dragonfly",
1215             target_os = "haiku"
1216         ),
1217         link_name = "__res_init"
1218     )]
1219     #[cfg_attr(
1220         any(
1221             target_os = "macos",
1222             target_os = "ios",
1223             target_os = "tvos",
1224             target_os = "watchos"
1225         ),
1226         link_name = "res_9_init"
1227     )]
1228     pub fn res_init() -> ::c_int;
1229 
1230     #[cfg_attr(target_os = "netbsd", link_name = "__gmtime_r50")]
1231     #[cfg_attr(any(target_env = "musl", target_env = "ohos"), allow(deprecated))]
1232     // FIXME: for `time_t`
1233     pub fn gmtime_r(time_p: *const time_t, result: *mut tm) -> *mut tm;
1234     #[cfg_attr(target_os = "netbsd", link_name = "__localtime_r50")]
1235     #[cfg_attr(any(target_env = "musl", target_env = "ohos"), allow(deprecated))]
1236     // FIXME: for `time_t`
1237     pub fn localtime_r(time_p: *const time_t, result: *mut tm) -> *mut tm;
1238     #[cfg_attr(
1239         all(target_os = "macos", target_arch = "x86"),
1240         link_name = "mktime$UNIX2003"
1241     )]
1242     #[cfg_attr(target_os = "netbsd", link_name = "__mktime50")]
1243     #[cfg_attr(any(target_env = "musl", target_env = "ohos"), allow(deprecated))]
1244     // FIXME: for `time_t`
1245     pub fn mktime(tm: *mut tm) -> time_t;
1246     #[cfg_attr(target_os = "netbsd", link_name = "__time50")]
1247     #[cfg_attr(any(target_env = "musl", target_env = "ohos"), allow(deprecated))]
1248     // FIXME: for `time_t`
1249     pub fn time(time: *mut time_t) -> time_t;
1250     #[cfg_attr(target_os = "netbsd", link_name = "__gmtime50")]
1251     #[cfg_attr(any(target_env = "musl", target_env = "ohos"), allow(deprecated))]
1252     // FIXME: for `time_t`
1253     pub fn gmtime(time_p: *const time_t) -> *mut tm;
1254     #[cfg_attr(target_os = "netbsd", link_name = "__locatime50")]
1255     #[cfg_attr(any(target_env = "musl", target_env = "ohos"), allow(deprecated))]
1256     // FIXME: for `time_t`
1257     pub fn localtime(time_p: *const time_t) -> *mut tm;
1258     #[cfg_attr(target_os = "netbsd", link_name = "__difftime50")]
1259     #[cfg_attr(any(target_env = "musl", target_env = "ohos"), allow(deprecated))]
1260     // FIXME: for `time_t`
1261     pub fn difftime(time1: time_t, time0: time_t) -> ::c_double;
1262     #[cfg_attr(target_os = "netbsd", link_name = "__timegm50")]
1263     #[cfg_attr(any(target_env = "musl", target_env = "ohos"), allow(deprecated))]
1264     // FIXME: for `time_t`
1265     pub fn timegm(tm: *mut ::tm) -> time_t;
1266 
1267     #[cfg_attr(target_os = "netbsd", link_name = "__mknod50")]
1268     #[cfg_attr(
1269         all(target_os = "freebsd", any(freebsd11, freebsd10)),
1270         link_name = "mknod@FBSD_1.0"
1271     )]
1272     pub fn mknod(pathname: *const ::c_char, mode: ::mode_t, dev: ::dev_t) -> ::c_int;
1273     pub fn gethostname(name: *mut ::c_char, len: ::size_t) -> ::c_int;
1274     pub fn endservent();
1275     pub fn getservbyname(name: *const ::c_char, proto: *const ::c_char) -> *mut servent;
1276     pub fn getservbyport(port: ::c_int, proto: *const ::c_char) -> *mut servent;
1277     pub fn getservent() -> *mut servent;
1278     pub fn setservent(stayopen: ::c_int);
1279     pub fn getprotobyname(name: *const ::c_char) -> *mut protoent;
1280     pub fn getprotobynumber(proto: ::c_int) -> *mut protoent;
1281     pub fn chroot(name: *const ::c_char) -> ::c_int;
1282     #[cfg_attr(
1283         all(target_os = "macos", target_arch = "x86"),
1284         link_name = "usleep$UNIX2003"
1285     )]
1286     pub fn usleep(secs: ::c_uint) -> ::c_int;
1287     #[cfg_attr(
1288         all(target_os = "macos", target_arch = "x86"),
1289         link_name = "send$UNIX2003"
1290     )]
1291     #[cfg_attr(target_os = "espidf", link_name = "lwip_send")]
1292     pub fn send(socket: ::c_int, buf: *const ::c_void, len: ::size_t, flags: ::c_int) -> ::ssize_t;
1293     #[cfg_attr(
1294         all(target_os = "macos", target_arch = "x86"),
1295         link_name = "recv$UNIX2003"
1296     )]
1297     #[cfg_attr(target_os = "espidf", link_name = "lwip_recv")]
1298     pub fn recv(socket: ::c_int, buf: *mut ::c_void, len: ::size_t, flags: ::c_int) -> ::ssize_t;
1299     #[cfg_attr(
1300         all(target_os = "macos", target_arch = "x86"),
1301         link_name = "putenv$UNIX2003"
1302     )]
1303     #[cfg_attr(target_os = "netbsd", link_name = "__putenv50")]
1304     pub fn putenv(string: *mut c_char) -> ::c_int;
1305     #[cfg_attr(
1306         all(target_os = "macos", target_arch = "x86"),
1307         link_name = "poll$UNIX2003"
1308     )]
1309     pub fn poll(fds: *mut pollfd, nfds: nfds_t, timeout: ::c_int) -> ::c_int;
1310     #[cfg_attr(
1311         all(target_os = "macos", target_arch = "x86_64"),
1312         link_name = "select$1050"
1313     )]
1314     #[cfg_attr(
1315         all(target_os = "macos", target_arch = "x86"),
1316         link_name = "select$UNIX2003"
1317     )]
1318     #[cfg_attr(target_os = "netbsd", link_name = "__select50")]
1319     pub fn select(
1320         nfds: ::c_int,
1321         readfds: *mut fd_set,
1322         writefds: *mut fd_set,
1323         errorfds: *mut fd_set,
1324         timeout: *mut timeval,
1325     ) -> ::c_int;
1326     #[cfg_attr(target_os = "netbsd", link_name = "__setlocale50")]
1327     pub fn setlocale(category: ::c_int, locale: *const ::c_char) -> *mut ::c_char;
1328     pub fn localeconv() -> *mut lconv;
1329 
1330     #[cfg_attr(
1331         all(target_os = "macos", target_arch = "x86"),
1332         link_name = "sem_wait$UNIX2003"
1333     )]
1334     pub fn sem_wait(sem: *mut sem_t) -> ::c_int;
1335     pub fn sem_trywait(sem: *mut sem_t) -> ::c_int;
1336     pub fn sem_post(sem: *mut sem_t) -> ::c_int;
1337     pub fn statvfs(path: *const c_char, buf: *mut statvfs) -> ::c_int;
1338     pub fn fstatvfs(fd: ::c_int, buf: *mut statvfs) -> ::c_int;
1339 
1340     #[cfg_attr(target_os = "netbsd", link_name = "__sigemptyset14")]
1341     pub fn sigemptyset(set: *mut sigset_t) -> ::c_int;
1342     #[cfg_attr(target_os = "netbsd", link_name = "__sigaddset14")]
1343     pub fn sigaddset(set: *mut sigset_t, signum: ::c_int) -> ::c_int;
1344     #[cfg_attr(target_os = "netbsd", link_name = "__sigfillset14")]
1345     pub fn sigfillset(set: *mut sigset_t) -> ::c_int;
1346     #[cfg_attr(target_os = "netbsd", link_name = "__sigdelset14")]
1347     pub fn sigdelset(set: *mut sigset_t, signum: ::c_int) -> ::c_int;
1348     #[cfg_attr(target_os = "netbsd", link_name = "__sigismember14")]
1349     pub fn sigismember(set: *const sigset_t, signum: ::c_int) -> ::c_int;
1350 
1351     #[cfg_attr(target_os = "netbsd", link_name = "__sigprocmask14")]
1352     pub fn sigprocmask(how: ::c_int, set: *const sigset_t, oldset: *mut sigset_t) -> ::c_int;
1353     #[cfg_attr(target_os = "netbsd", link_name = "__sigpending14")]
1354     pub fn sigpending(set: *mut sigset_t) -> ::c_int;
1355 
1356     pub fn sysconf(name: ::c_int) -> ::c_long;
1357 
1358     pub fn mkfifo(path: *const c_char, mode: mode_t) -> ::c_int;
1359 
1360     pub fn fseeko(stream: *mut ::FILE, offset: ::off_t, whence: ::c_int) -> ::c_int;
1361     pub fn ftello(stream: *mut ::FILE) -> ::off_t;
1362     #[cfg_attr(
1363         all(target_os = "macos", target_arch = "x86"),
1364         link_name = "tcdrain$UNIX2003"
1365     )]
1366     pub fn tcdrain(fd: ::c_int) -> ::c_int;
1367     pub fn cfgetispeed(termios: *const ::termios) -> ::speed_t;
1368     pub fn cfgetospeed(termios: *const ::termios) -> ::speed_t;
1369     pub fn cfsetispeed(termios: *mut ::termios, speed: ::speed_t) -> ::c_int;
1370     pub fn cfsetospeed(termios: *mut ::termios, speed: ::speed_t) -> ::c_int;
1371     pub fn tcgetattr(fd: ::c_int, termios: *mut ::termios) -> ::c_int;
1372     pub fn tcsetattr(fd: ::c_int, optional_actions: ::c_int, termios: *const ::termios) -> ::c_int;
1373     pub fn tcflow(fd: ::c_int, action: ::c_int) -> ::c_int;
1374     pub fn tcflush(fd: ::c_int, action: ::c_int) -> ::c_int;
1375     pub fn tcgetsid(fd: ::c_int) -> ::pid_t;
1376     pub fn tcsendbreak(fd: ::c_int, duration: ::c_int) -> ::c_int;
1377     pub fn mkstemp(template: *mut ::c_char) -> ::c_int;
1378     pub fn mkdtemp(template: *mut ::c_char) -> *mut ::c_char;
1379 
1380     pub fn tmpnam(ptr: *mut ::c_char) -> *mut ::c_char;
1381 
1382     pub fn openlog(ident: *const ::c_char, logopt: ::c_int, facility: ::c_int);
1383     pub fn closelog();
1384     pub fn setlogmask(maskpri: ::c_int) -> ::c_int;
1385     #[cfg_attr(target_os = "macos", link_name = "syslog$DARWIN_EXTSN")]
1386     pub fn syslog(priority: ::c_int, message: *const ::c_char, ...);
1387     #[cfg_attr(
1388         all(target_os = "macos", target_arch = "x86"),
1389         link_name = "nice$UNIX2003"
1390     )]
1391     pub fn nice(incr: ::c_int) -> ::c_int;
1392 
1393     pub fn grantpt(fd: ::c_int) -> ::c_int;
1394     pub fn posix_openpt(flags: ::c_int) -> ::c_int;
1395     pub fn ptsname(fd: ::c_int) -> *mut ::c_char;
1396     pub fn unlockpt(fd: ::c_int) -> ::c_int;
1397 
1398     pub fn strcasestr(cs: *const c_char, ct: *const c_char) -> *mut c_char;
1399     pub fn getline(lineptr: *mut *mut c_char, n: *mut size_t, stream: *mut FILE) -> ssize_t;
1400 
1401     pub fn lockf(fd: ::c_int, cmd: ::c_int, len: ::off_t) -> ::c_int;
1402 
1403 }
1404 
1405 cfg_if! {
1406     if #[cfg(not(target_os = "vita"))] {
1407         extern "C" {
1408             #[cfg_attr(
1409                 all(target_os = "macos", target_arch = "x86"),
1410                 link_name = "socketpair$UNIX2003"
1411             )]
1412             #[cfg_attr(target_os = "illumos", link_name = "__xnet_socketpair")]
1413             pub fn socketpair(
1414                 domain: ::c_int,
1415                 type_: ::c_int,
1416                 protocol: ::c_int,
1417                 socket_vector: *mut ::c_int,
1418             ) -> ::c_int;
1419         }
1420     }
1421 }
1422 
1423 cfg_if! {
1424     if #[cfg(not(any(target_os = "emscripten",
1425                      target_os = "android",
1426                      target_os = "haiku",
1427                      target_os = "nto")))] {
1428         extern "C" {
1429             pub fn adjtime(delta: *const timeval, olddelta: *mut timeval) -> ::c_int;
1430             pub fn stpncpy(dst: *mut c_char, src: *const c_char, n: size_t) -> *mut c_char;
1431         }
1432     }
1433 }
1434 
1435 cfg_if! {
1436     if #[cfg(not(target_os = "aix"))] {
1437         extern "C" {
1438             pub fn dladdr(addr: *const ::c_void, info: *mut Dl_info) -> ::c_int;
1439         }
1440     }
1441 }
1442 
1443 cfg_if! {
1444     if #[cfg(not(any(target_env = "uclibc", target_os = "nto")))] {
1445         extern "C" {
1446             pub fn open_wmemstream(
1447                 ptr: *mut *mut wchar_t,
1448                 sizeloc: *mut size_t,
1449             ) -> *mut FILE;
1450         }
1451     }
1452 }
1453 
1454 cfg_if! {
1455     if #[cfg(not(target_os = "redox"))] {
1456         extern {
1457             pub fn getsid(pid: pid_t) -> pid_t;
1458             #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
1459                        link_name = "pause$UNIX2003")]
1460             pub fn pause() -> ::c_int;
1461 
1462             pub fn mkdirat(dirfd: ::c_int, pathname: *const ::c_char,
1463                           mode: ::mode_t) -> ::c_int;
1464             pub fn openat(dirfd: ::c_int, pathname: *const ::c_char,
1465                           flags: ::c_int, ...) -> ::c_int;
1466 
1467             #[cfg_attr(all(target_os = "macos", target_arch = "x86_64"),
1468                        link_name = "fdopendir$INODE64")]
1469             #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
1470                        link_name = "fdopendir$INODE64$UNIX2003")]
1471             pub fn fdopendir(fd: ::c_int) -> *mut ::DIR;
1472 
1473             #[cfg_attr(all(target_os = "macos", not(target_arch = "aarch64")),
1474                        link_name = "readdir_r$INODE64")]
1475             #[cfg_attr(target_os = "netbsd", link_name = "__readdir_r30")]
1476             #[cfg_attr(
1477                 all(target_os = "freebsd", any(freebsd11, freebsd10)),
1478                 link_name = "readdir_r@FBSD_1.0"
1479             )]
1480             #[allow(non_autolinks)] // FIXME: `<>` breaks line length limit.
1481             /// The 64-bit libc on Solaris and illumos only has readdir_r. If a
1482             /// 32-bit Solaris or illumos target is ever created, it should use
1483             /// __posix_readdir_r. See libc(3LIB) on Solaris or illumos:
1484             /// https://illumos.org/man/3lib/libc
1485             /// https://docs.oracle.com/cd/E36784_01/html/E36873/libc-3lib.html
1486             /// https://www.unix.com/man-page/opensolaris/3LIB/libc/
1487             pub fn readdir_r(dirp: *mut ::DIR, entry: *mut ::dirent,
1488                              result: *mut *mut ::dirent) -> ::c_int;
1489         }
1490     }
1491 }
1492 
1493 cfg_if! {
1494     if #[cfg(target_os = "nto")] {
1495         extern {
1496             pub fn readlinkat(dirfd: ::c_int,
1497                 pathname: *const ::c_char,
1498                 buf: *mut ::c_char,
1499                 bufsiz: ::size_t) -> ::c_int;
1500             pub fn readlink(path: *const c_char, buf: *mut c_char, bufsz: ::size_t) -> ::c_int;
1501             pub fn pselect(
1502                 nfds: ::c_int,
1503                 readfds: *mut fd_set,
1504                 writefds: *mut fd_set,
1505                 errorfds: *mut fd_set,
1506                 timeout: *mut timespec,
1507                 sigmask: *const sigset_t,
1508             ) -> ::c_int;
1509             pub fn sigaction(
1510                 signum: ::c_int,
1511                 act: *const sigaction,
1512                 oldact: *mut sigaction
1513             ) -> ::c_int;
1514         }
1515     } else {
1516         extern {
1517             pub fn readlinkat(dirfd: ::c_int,
1518                 pathname: *const ::c_char,
1519                 buf: *mut ::c_char,
1520                 bufsiz: ::size_t) -> ::ssize_t;
1521             pub fn fmemopen(buf: *mut c_void, size: size_t, mode: *const c_char) -> *mut FILE;
1522             pub fn open_memstream(ptr: *mut *mut c_char, sizeloc: *mut size_t) -> *mut FILE;
1523             pub fn atexit(cb: extern "C" fn()) -> c_int;
1524             #[cfg_attr(target_os = "netbsd", link_name = "__sigaction14")]
1525             pub fn sigaction(
1526                 signum: ::c_int,
1527                 act: *const sigaction,
1528                 oldact: *mut sigaction
1529             ) -> ::c_int;
1530             pub fn readlink(path: *const c_char, buf: *mut c_char, bufsz: ::size_t) -> ::ssize_t;
1531             #[cfg_attr(
1532                 all(target_os = "macos", target_arch = "x86_64"),
1533                 link_name = "pselect$1050"
1534             )]
1535             #[cfg_attr(
1536                 all(target_os = "macos", target_arch = "x86"),
1537                 link_name = "pselect$UNIX2003"
1538             )]
1539             #[cfg_attr(target_os = "netbsd", link_name = "__pselect50")]
1540             pub fn pselect(
1541                 nfds: ::c_int,
1542                 readfds: *mut fd_set,
1543                 writefds: *mut fd_set,
1544                 errorfds: *mut fd_set,
1545                 timeout: *const timespec,
1546                 sigmask: *const sigset_t,
1547             ) -> ::c_int;
1548         }
1549     }
1550 }
1551 
1552 cfg_if! {
1553    if #[cfg(not(any(target_os = "solaris",
1554                     target_os = "illumos",
1555                     target_os = "nto",
1556                 )))] {
1557         extern {
1558             pub fn cfmakeraw(termios: *mut ::termios);
1559             pub fn cfsetspeed(termios: *mut ::termios,
1560                               speed: ::speed_t) -> ::c_int;
1561         }
1562    }
1563 }
1564 
1565 cfg_if! {
1566     if #[cfg(target_env = "newlib")] {
1567         mod newlib;
1568         pub use self::newlib::*;
1569     } else if #[cfg(any(target_os = "linux",
1570                         target_os = "l4re",
1571                         target_os = "android",
1572                         target_os = "emscripten"))] {
1573         mod linux_like;
1574         pub use self::linux_like::*;
1575     } else if #[cfg(any(target_os = "macos",
1576                         target_os = "ios",
1577                         target_os = "tvos",
1578                         target_os = "watchos",
1579                         target_os = "freebsd",
1580                         target_os = "dragonfly",
1581                         target_os = "openbsd",
1582                         target_os = "netbsd"))] {
1583         mod bsd;
1584         pub use self::bsd::*;
1585     } else if #[cfg(any(target_os = "solaris",
1586                         target_os = "illumos"))] {
1587         mod solarish;
1588         pub use self::solarish::*;
1589     } else if #[cfg(target_os = "haiku")] {
1590         mod haiku;
1591         pub use self::haiku::*;
1592     } else if #[cfg(target_os = "redox")] {
1593         mod redox;
1594         pub use self::redox::*;
1595     } else if #[cfg(target_os = "nto")] {
1596         mod nto;
1597         pub use self::nto::*;
1598     } else if #[cfg(target_os = "aix")] {
1599         mod aix;
1600         pub use self::aix::*;
1601     } else {
1602         // Unknown target_os
1603     }
1604 }
1605 
1606 cfg_if! {
1607     if #[cfg(libc_core_cvoid)] {
1608         pub use ::ffi::c_void;
1609     } else {
1610         // Use repr(u8) as LLVM expects `void*` to be the same as `i8*` to help
1611         // enable more optimization opportunities around it recognizing things
1612         // like malloc/free.
1613         #[repr(u8)]
1614         #[allow(missing_copy_implementations)]
1615         #[allow(missing_debug_implementations)]
1616         pub enum c_void {
1617             // Two dummy variants so the #[repr] attribute can be used.
1618             #[doc(hidden)]
1619             __variant1,
1620             #[doc(hidden)]
1621             __variant2,
1622         }
1623     }
1624 }
1625 
1626 cfg_if! {
1627     if #[cfg(libc_align)] {
1628         mod align;
1629         pub use self::align::*;
1630     } else {
1631         mod no_align;
1632         pub use self::no_align::*;
1633     }
1634 }
1635