xref: /rust-libc-0.2.174/src/unix/mod.rs (revision cacee27d)
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 missing! {
45     #[cfg_attr(feature = "extra_traits", derive(Debug))]
46     pub enum DIR {}
47 }
48 pub type locale_t = *mut ::c_void;
49 
50 s! {
51     pub struct group {
52         pub gr_name: *mut ::c_char,
53         pub gr_passwd: *mut ::c_char,
54         pub gr_gid: ::gid_t,
55         pub gr_mem: *mut *mut ::c_char,
56     }
57 
58     pub struct utimbuf {
59         pub actime: time_t,
60         pub modtime: time_t,
61     }
62 
63     pub struct timeval {
64         pub tv_sec: time_t,
65         pub tv_usec: suseconds_t,
66     }
67 
68     // linux x32 compatibility
69     // See https://sourceware.org/bugzilla/show_bug.cgi?id=16437
70     pub struct timespec {
71         pub tv_sec: time_t,
72         #[cfg(all(target_arch = "x86_64", target_pointer_width = "32"))]
73         pub tv_nsec: i64,
74         #[cfg(not(all(target_arch = "x86_64", target_pointer_width = "32")))]
75         pub tv_nsec: ::c_long,
76     }
77 
78     pub struct rlimit {
79         pub rlim_cur: rlim_t,
80         pub rlim_max: rlim_t,
81     }
82 
83     pub struct rusage {
84         pub ru_utime: timeval,
85         pub ru_stime: timeval,
86         pub ru_maxrss: c_long,
87         #[cfg(all(target_arch = "x86_64", target_pointer_width = "32"))]
88         __pad1: u32,
89         pub ru_ixrss: c_long,
90         #[cfg(all(target_arch = "x86_64", target_pointer_width = "32"))]
91         __pad2: u32,
92         pub ru_idrss: c_long,
93         #[cfg(all(target_arch = "x86_64", target_pointer_width = "32"))]
94         __pad3: u32,
95         pub ru_isrss: c_long,
96         #[cfg(all(target_arch = "x86_64", target_pointer_width = "32"))]
97         __pad4: u32,
98         pub ru_minflt: c_long,
99         #[cfg(all(target_arch = "x86_64", target_pointer_width = "32"))]
100         __pad5: u32,
101         pub ru_majflt: c_long,
102         #[cfg(all(target_arch = "x86_64", target_pointer_width = "32"))]
103         __pad6: u32,
104         pub ru_nswap: c_long,
105         #[cfg(all(target_arch = "x86_64", target_pointer_width = "32"))]
106         __pad7: u32,
107         pub ru_inblock: c_long,
108         #[cfg(all(target_arch = "x86_64", target_pointer_width = "32"))]
109         __pad8: u32,
110         pub ru_oublock: c_long,
111         #[cfg(all(target_arch = "x86_64", target_pointer_width = "32"))]
112         __pad9: u32,
113         pub ru_msgsnd: c_long,
114         #[cfg(all(target_arch = "x86_64", target_pointer_width = "32"))]
115         __pad10: u32,
116         pub ru_msgrcv: c_long,
117         #[cfg(all(target_arch = "x86_64", target_pointer_width = "32"))]
118         __pad11: u32,
119         pub ru_nsignals: c_long,
120         #[cfg(all(target_arch = "x86_64", target_pointer_width = "32"))]
121         __pad12: u32,
122         pub ru_nvcsw: c_long,
123         #[cfg(all(target_arch = "x86_64", target_pointer_width = "32"))]
124         __pad13: u32,
125         pub ru_nivcsw: c_long,
126         #[cfg(all(target_arch = "x86_64", target_pointer_width = "32"))]
127         __pad14: u32,
128 
129         #[cfg(any(target_env = "musl", target_env = "ohos", target_os = "emscripten"))]
130         __reserved: [c_long; 16],
131     }
132 
133     pub struct ipv6_mreq {
134         pub ipv6mr_multiaddr: in6_addr,
135         #[cfg(target_os = "android")]
136         pub ipv6mr_interface: ::c_int,
137         #[cfg(not(target_os = "android"))]
138         pub ipv6mr_interface: ::c_uint,
139     }
140 
141     pub struct hostent {
142         pub h_name: *mut ::c_char,
143         pub h_aliases: *mut *mut ::c_char,
144         pub h_addrtype: ::c_int,
145         pub h_length: ::c_int,
146         pub h_addr_list: *mut *mut ::c_char,
147     }
148 
149     pub struct iovec {
150         pub iov_base: *mut ::c_void,
151         pub iov_len: ::size_t,
152     }
153 
154     pub struct pollfd {
155         pub fd: ::c_int,
156         pub events: ::c_short,
157         pub revents: ::c_short,
158     }
159 
160     pub struct winsize {
161         pub ws_row: ::c_ushort,
162         pub ws_col: ::c_ushort,
163         pub ws_xpixel: ::c_ushort,
164         pub ws_ypixel: ::c_ushort,
165     }
166 
167     pub struct linger {
168         pub l_onoff: ::c_int,
169         pub l_linger: ::c_int,
170     }
171 
172     pub struct sigval {
173         // Actually a union of an int and a void*
174         pub sival_ptr: *mut ::c_void
175     }
176 
177     // <sys/time.h>
178     pub struct itimerval {
179         pub it_interval: ::timeval,
180         pub it_value: ::timeval,
181     }
182 
183     // <sys/times.h>
184     pub struct tms {
185         pub tms_utime: ::clock_t,
186         pub tms_stime: ::clock_t,
187         pub tms_cutime: ::clock_t,
188         pub tms_cstime: ::clock_t,
189     }
190 
191     pub struct servent {
192         pub s_name: *mut ::c_char,
193         pub s_aliases: *mut *mut ::c_char,
194         pub s_port: ::c_int,
195         pub s_proto: *mut ::c_char,
196     }
197 
198     pub struct protoent {
199         pub p_name: *mut ::c_char,
200         pub p_aliases: *mut *mut ::c_char,
201         pub p_proto: ::c_int,
202     }
203 }
204 
205 pub const INT_MIN: c_int = -2147483648;
206 pub const INT_MAX: c_int = 2147483647;
207 
208 pub const SIG_DFL: sighandler_t = 0 as sighandler_t;
209 pub const SIG_IGN: sighandler_t = 1 as sighandler_t;
210 pub const SIG_ERR: sighandler_t = !0 as sighandler_t;
211 cfg_if! {
212     if #[cfg(not(target_os = "nto"))] {
213         pub const DT_UNKNOWN: u8 = 0;
214         pub const DT_FIFO: u8 = 1;
215         pub const DT_CHR: u8 = 2;
216         pub const DT_DIR: u8 = 4;
217         pub const DT_BLK: u8 = 6;
218         pub const DT_REG: u8 = 8;
219         pub const DT_LNK: u8 = 10;
220         pub const DT_SOCK: u8 = 12;
221     }
222 }
223 cfg_if! {
224     if #[cfg(not(target_os = "redox"))] {
225         pub const FD_CLOEXEC: ::c_int = 0x1;
226     }
227 }
228 
229 cfg_if! {
230     if #[cfg(not(target_os = "nto"))]
231     {
232         pub const USRQUOTA: ::c_int = 0;
233         pub const GRPQUOTA: ::c_int = 1;
234     }
235 }
236 pub const SIGIOT: ::c_int = 6;
237 
238 pub const S_ISUID: ::mode_t = 0x800;
239 pub const S_ISGID: ::mode_t = 0x400;
240 pub const S_ISVTX: ::mode_t = 0x200;
241 
242 cfg_if! {
243     if #[cfg(not(any(target_os = "haiku", target_os = "illumos",
244                      target_os = "solaris")))] {
245         pub const IF_NAMESIZE: ::size_t = 16;
246         pub const IFNAMSIZ: ::size_t = IF_NAMESIZE;
247     }
248 }
249 
250 pub const LOG_EMERG: ::c_int = 0;
251 pub const LOG_ALERT: ::c_int = 1;
252 pub const LOG_CRIT: ::c_int = 2;
253 pub const LOG_ERR: ::c_int = 3;
254 pub const LOG_WARNING: ::c_int = 4;
255 pub const LOG_NOTICE: ::c_int = 5;
256 pub const LOG_INFO: ::c_int = 6;
257 pub const LOG_DEBUG: ::c_int = 7;
258 
259 pub const LOG_KERN: ::c_int = 0;
260 pub const LOG_USER: ::c_int = 1 << 3;
261 pub const LOG_MAIL: ::c_int = 2 << 3;
262 pub const LOG_DAEMON: ::c_int = 3 << 3;
263 pub const LOG_AUTH: ::c_int = 4 << 3;
264 pub const LOG_SYSLOG: ::c_int = 5 << 3;
265 pub const LOG_LPR: ::c_int = 6 << 3;
266 pub const LOG_NEWS: ::c_int = 7 << 3;
267 pub const LOG_UUCP: ::c_int = 8 << 3;
268 pub const LOG_LOCAL0: ::c_int = 16 << 3;
269 pub const LOG_LOCAL1: ::c_int = 17 << 3;
270 pub const LOG_LOCAL2: ::c_int = 18 << 3;
271 pub const LOG_LOCAL3: ::c_int = 19 << 3;
272 pub const LOG_LOCAL4: ::c_int = 20 << 3;
273 pub const LOG_LOCAL5: ::c_int = 21 << 3;
274 pub const LOG_LOCAL6: ::c_int = 22 << 3;
275 pub const LOG_LOCAL7: ::c_int = 23 << 3;
276 
277 cfg_if! {
278     if #[cfg(not(target_os = "haiku"))] {
279         pub const LOG_PID: ::c_int = 0x01;
280         pub const LOG_CONS: ::c_int = 0x02;
281         pub const LOG_ODELAY: ::c_int = 0x04;
282         pub const LOG_NDELAY: ::c_int = 0x08;
283         pub const LOG_NOWAIT: ::c_int = 0x10;
284     }
285 }
286 pub const LOG_PRIMASK: ::c_int = 7;
287 pub const LOG_FACMASK: ::c_int = 0x3f8;
288 
289 cfg_if! {
290     if #[cfg(not(target_os = "nto"))]
291     {
292         pub const PRIO_MIN: ::c_int = -20;
293         pub const PRIO_MAX: ::c_int = 20;
294     }
295 }
296 pub const IPPROTO_ICMP: ::c_int = 1;
297 pub const IPPROTO_ICMPV6: ::c_int = 58;
298 pub const IPPROTO_TCP: ::c_int = 6;
299 pub const IPPROTO_UDP: ::c_int = 17;
300 pub const IPPROTO_IP: ::c_int = 0;
301 pub const IPPROTO_IPV6: ::c_int = 41;
302 
303 pub const INADDR_LOOPBACK: in_addr_t = 2130706433;
304 pub const INADDR_ANY: in_addr_t = 0;
305 pub const INADDR_BROADCAST: in_addr_t = 4294967295;
306 pub const INADDR_NONE: in_addr_t = 4294967295;
307 
308 pub const ARPOP_REQUEST: u16 = 1;
309 pub const ARPOP_REPLY: u16 = 2;
310 
311 pub const ATF_COM: ::c_int = 0x02;
312 pub const ATF_PERM: ::c_int = 0x04;
313 pub const ATF_PUBL: ::c_int = 0x08;
314 pub const ATF_USETRAILERS: ::c_int = 0x10;
315 
316 extern "C" {
317     pub static in6addr_loopback: in6_addr;
318     pub static in6addr_any: in6_addr;
319 }
320 
321 cfg_if! {
322     if #[cfg(any(target_os = "l4re", target_os = "espidf", target_os = "nuttx"))] {
323         // required libraries are linked externally for these platforms:
324         // * L4Re
325         // * ESP-IDF
326         // * NuttX
327     } else if #[cfg(feature = "std")] {
328         // cargo build, don't pull in anything extra as the std dep
329         // already pulls in all libs.
330     } else if #[cfg(all(target_os = "linux",
331                         any(target_env = "gnu", target_env = "uclibc"),
332                         feature = "rustc-dep-of-std"))] {
333         #[link(name = "util", kind = "static", modifiers = "-bundle",
334             cfg(target_feature = "crt-static"))]
335         #[link(name = "rt", kind = "static", modifiers = "-bundle",
336             cfg(target_feature = "crt-static"))]
337         #[link(name = "pthread", kind = "static", modifiers = "-bundle",
338             cfg(target_feature = "crt-static"))]
339         #[link(name = "m", kind = "static", modifiers = "-bundle",
340             cfg(target_feature = "crt-static"))]
341         #[link(name = "dl", kind = "static", modifiers = "-bundle",
342             cfg(target_feature = "crt-static"))]
343         #[link(name = "c", kind = "static", modifiers = "-bundle",
344             cfg(target_feature = "crt-static"))]
345         #[link(name = "gcc_eh", kind = "static", modifiers = "-bundle",
346             cfg(target_feature = "crt-static"))]
347         #[link(name = "gcc", kind = "static", modifiers = "-bundle",
348             cfg(target_feature = "crt-static"))]
349         #[link(name = "c", kind = "static", modifiers = "-bundle",
350             cfg(target_feature = "crt-static"))]
351         #[link(name = "util", cfg(not(target_feature = "crt-static")))]
352         #[link(name = "rt", cfg(not(target_feature = "crt-static")))]
353         #[link(name = "pthread", cfg(not(target_feature = "crt-static")))]
354         #[link(name = "m", cfg(not(target_feature = "crt-static")))]
355         #[link(name = "dl", cfg(not(target_feature = "crt-static")))]
356         #[link(name = "c", cfg(not(target_feature = "crt-static")))]
357         extern {}
358     } else if #[cfg(any(target_env = "musl", target_env = "ohos"))] {
359         #[cfg_attr(feature = "rustc-dep-of-std",
360                    link(name = "c", kind = "static", modifiers = "-bundle",
361                         cfg(target_feature = "crt-static")))]
362         #[cfg_attr(feature = "rustc-dep-of-std",
363                    link(name = "c", cfg(not(target_feature = "crt-static"))))]
364         extern {}
365     } else if #[cfg(target_os = "emscripten")] {
366         #[link(name = "c")]
367         extern {}
368     } else if #[cfg(all(target_os = "android", feature = "rustc-dep-of-std"))] {
369         #[link(name = "c", kind = "static", modifiers = "-bundle",
370             cfg(target_feature = "crt-static"))]
371         #[link(name = "m", kind = "static", modifiers = "-bundle",
372             cfg(target_feature = "crt-static"))]
373         #[link(name = "m", cfg(not(target_feature = "crt-static")))]
374         #[link(name = "c", cfg(not(target_feature = "crt-static")))]
375         extern {}
376     } else if #[cfg(any(target_os = "macos",
377                         target_os = "ios",
378                         target_os = "tvos",
379                         target_os = "watchos",
380                         target_os = "visionos",
381                         target_os = "android",
382                         target_os = "openbsd",
383                         target_os = "nto",
384                     ))] {
385         #[link(name = "c")]
386         #[link(name = "m")]
387         extern {}
388     } else if #[cfg(target_os = "haiku")] {
389         #[link(name = "root")]
390         #[link(name = "network")]
391         extern {}
392     } else if #[cfg(target_env = "newlib")] {
393         #[link(name = "c")]
394         #[link(name = "m")]
395         extern {}
396     } else if #[cfg(target_env = "illumos")] {
397         #[link(name = "c")]
398         #[link(name = "m")]
399         extern {}
400     } else if #[cfg(target_os = "redox")] {
401         #[cfg_attr(feature = "rustc-dep-of-std",
402                    link(name = "c", kind = "static", modifiers = "-bundle",
403                         cfg(target_feature = "crt-static")))]
404         #[cfg_attr(feature = "rustc-dep-of-std",
405                    link(name = "c", cfg(not(target_feature = "crt-static"))))]
406         extern {}
407     } else if #[cfg(target_os = "aix")] {
408         #[link(name = "c")]
409         #[link(name = "m")]
410         #[link(name = "bsd")]
411         #[link(name = "pthread")]
412         extern {}
413     } else {
414         #[link(name = "c")]
415         #[link(name = "m")]
416         #[link(name = "rt")]
417         #[link(name = "pthread")]
418         extern {}
419     }
420 }
421 
422 missing! {
423     #[cfg_attr(feature = "extra_traits", derive(Debug))]
424     pub enum FILE {}
425     #[cfg_attr(feature = "extra_traits", derive(Debug))]
426     pub enum fpos_t {} // FIXME: fill this out with a struct
427 }
428 
429 extern "C" {
430     pub fn isalnum(c: c_int) -> c_int;
431     pub fn isalpha(c: c_int) -> c_int;
432     pub fn iscntrl(c: c_int) -> c_int;
433     pub fn isdigit(c: c_int) -> c_int;
434     pub fn isgraph(c: c_int) -> c_int;
435     pub fn islower(c: c_int) -> c_int;
436     pub fn isprint(c: c_int) -> c_int;
437     pub fn ispunct(c: c_int) -> c_int;
438     pub fn isspace(c: c_int) -> c_int;
439     pub fn isupper(c: c_int) -> c_int;
440     pub fn isxdigit(c: c_int) -> c_int;
441     pub fn isblank(c: c_int) -> c_int;
442     pub fn tolower(c: c_int) -> c_int;
443     pub fn toupper(c: c_int) -> c_int;
444     pub fn qsort(
445         base: *mut c_void,
446         num: size_t,
447         size: size_t,
448         compar: ::Option<unsafe extern "C" fn(*const c_void, *const c_void) -> c_int>,
449     );
450     pub fn bsearch(
451         key: *const c_void,
452         base: *const c_void,
453         num: size_t,
454         size: size_t,
455         compar: ::Option<unsafe extern "C" fn(*const c_void, *const c_void) -> c_int>,
456     ) -> *mut c_void;
457     #[cfg_attr(
458         all(target_os = "macos", target_arch = "x86"),
459         link_name = "fopen$UNIX2003"
460     )]
461     pub fn fopen(filename: *const c_char, mode: *const c_char) -> *mut FILE;
462     #[cfg_attr(
463         all(target_os = "macos", target_arch = "x86"),
464         link_name = "freopen$UNIX2003"
465     )]
466     pub fn freopen(filename: *const c_char, mode: *const c_char, file: *mut FILE) -> *mut FILE;
467 
468     pub fn fflush(file: *mut FILE) -> c_int;
469     pub fn fclose(file: *mut FILE) -> c_int;
470     pub fn remove(filename: *const c_char) -> c_int;
471     pub fn rename(oldname: *const c_char, newname: *const c_char) -> c_int;
472     pub fn tmpfile() -> *mut FILE;
473     pub fn setvbuf(stream: *mut FILE, buffer: *mut c_char, mode: c_int, size: size_t) -> c_int;
474     pub fn setbuf(stream: *mut FILE, buf: *mut c_char);
475     pub fn getchar() -> c_int;
476     pub fn putchar(c: c_int) -> c_int;
477     pub fn fgetc(stream: *mut FILE) -> c_int;
478     pub fn fgets(buf: *mut c_char, n: c_int, stream: *mut FILE) -> *mut c_char;
479     pub fn fputc(c: c_int, stream: *mut FILE) -> c_int;
480     #[cfg_attr(
481         all(target_os = "macos", target_arch = "x86"),
482         link_name = "fputs$UNIX2003"
483     )]
484     pub fn fputs(s: *const c_char, stream: *mut FILE) -> c_int;
485     pub fn puts(s: *const c_char) -> c_int;
486     pub fn ungetc(c: c_int, stream: *mut FILE) -> c_int;
487     pub fn fread(ptr: *mut c_void, size: size_t, nobj: size_t, stream: *mut FILE) -> size_t;
488     #[cfg_attr(
489         all(target_os = "macos", target_arch = "x86"),
490         link_name = "fwrite$UNIX2003"
491     )]
492     pub fn fwrite(ptr: *const c_void, size: size_t, nobj: size_t, stream: *mut FILE) -> size_t;
493     pub fn fseek(stream: *mut FILE, offset: c_long, whence: c_int) -> c_int;
494     pub fn ftell(stream: *mut FILE) -> c_long;
495     pub fn rewind(stream: *mut FILE);
496     #[cfg_attr(target_os = "netbsd", link_name = "__fgetpos50")]
497     pub fn fgetpos(stream: *mut FILE, ptr: *mut fpos_t) -> c_int;
498     #[cfg_attr(target_os = "netbsd", link_name = "__fsetpos50")]
499     pub fn fsetpos(stream: *mut FILE, ptr: *const fpos_t) -> c_int;
500     pub fn feof(stream: *mut FILE) -> c_int;
501     pub fn ferror(stream: *mut FILE) -> c_int;
502     pub fn clearerr(stream: *mut FILE);
503     pub fn perror(s: *const c_char);
504     pub fn atof(s: *const c_char) -> c_double;
505     pub fn atoi(s: *const c_char) -> c_int;
506     pub fn atol(s: *const c_char) -> c_long;
507     pub fn atoll(s: *const c_char) -> c_longlong;
508     #[cfg_attr(
509         all(target_os = "macos", target_arch = "x86"),
510         link_name = "strtod$UNIX2003"
511     )]
512     pub fn strtod(s: *const c_char, endp: *mut *mut c_char) -> c_double;
513     pub fn strtof(s: *const c_char, endp: *mut *mut c_char) -> c_float;
514     pub fn strtol(s: *const c_char, endp: *mut *mut c_char, base: c_int) -> c_long;
515     pub fn strtoll(s: *const c_char, endp: *mut *mut c_char, base: c_int) -> c_longlong;
516     pub fn strtoul(s: *const c_char, endp: *mut *mut c_char, base: c_int) -> c_ulong;
517     pub fn strtoull(s: *const c_char, endp: *mut *mut c_char, base: c_int) -> c_ulonglong;
518     pub fn calloc(nobj: size_t, size: size_t) -> *mut c_void;
519     pub fn malloc(size: size_t) -> *mut c_void;
520     pub fn realloc(p: *mut c_void, size: size_t) -> *mut c_void;
521     pub fn free(p: *mut c_void);
522     pub fn abort() -> !;
523     pub fn exit(status: c_int) -> !;
524     pub fn _exit(status: c_int) -> !;
525     #[cfg_attr(
526         all(target_os = "macos", target_arch = "x86"),
527         link_name = "system$UNIX2003"
528     )]
529     pub fn system(s: *const c_char) -> c_int;
530     pub fn getenv(s: *const c_char) -> *mut c_char;
531 
532     pub fn strcpy(dst: *mut c_char, src: *const c_char) -> *mut c_char;
533     pub fn strncpy(dst: *mut c_char, src: *const c_char, n: size_t) -> *mut c_char;
534     pub fn stpcpy(dst: *mut c_char, src: *const c_char) -> *mut c_char;
535     pub fn strcat(s: *mut c_char, ct: *const c_char) -> *mut c_char;
536     pub fn strncat(s: *mut c_char, ct: *const c_char, n: size_t) -> *mut c_char;
537     pub fn strcmp(cs: *const c_char, ct: *const c_char) -> c_int;
538     pub fn strncmp(cs: *const c_char, ct: *const c_char, n: size_t) -> c_int;
539     pub fn strcoll(cs: *const c_char, ct: *const c_char) -> c_int;
540     pub fn strchr(cs: *const c_char, c: c_int) -> *mut c_char;
541     pub fn strrchr(cs: *const c_char, c: c_int) -> *mut c_char;
542     pub fn strspn(cs: *const c_char, ct: *const c_char) -> size_t;
543     pub fn strcspn(cs: *const c_char, ct: *const c_char) -> size_t;
544     pub fn strdup(cs: *const c_char) -> *mut c_char;
545     pub fn strndup(cs: *const c_char, n: size_t) -> *mut c_char;
546     pub fn strpbrk(cs: *const c_char, ct: *const c_char) -> *mut c_char;
547     pub fn strstr(cs: *const c_char, ct: *const c_char) -> *mut c_char;
548     pub fn strcasecmp(s1: *const c_char, s2: *const c_char) -> c_int;
549     pub fn strncasecmp(s1: *const c_char, s2: *const c_char, n: size_t) -> c_int;
550     pub fn strlen(cs: *const c_char) -> size_t;
551     pub fn strnlen(cs: *const c_char, maxlen: size_t) -> size_t;
552     #[cfg_attr(
553         all(target_os = "macos", target_arch = "x86"),
554         link_name = "strerror$UNIX2003"
555     )]
556     pub fn strerror(n: c_int) -> *mut c_char;
557     pub fn strtok(s: *mut c_char, t: *const c_char) -> *mut c_char;
558     pub fn strtok_r(s: *mut c_char, t: *const c_char, p: *mut *mut c_char) -> *mut c_char;
559     pub fn strxfrm(s: *mut c_char, ct: *const c_char, n: size_t) -> size_t;
560     pub fn strsignal(sig: c_int) -> *mut c_char;
561     pub fn wcslen(buf: *const wchar_t) -> size_t;
562     pub fn wcstombs(dest: *mut c_char, src: *const wchar_t, n: size_t) -> ::size_t;
563 
564     pub fn memchr(cx: *const c_void, c: c_int, n: size_t) -> *mut c_void;
565     pub fn wmemchr(cx: *const wchar_t, c: wchar_t, n: size_t) -> *mut wchar_t;
566     pub fn memcmp(cx: *const c_void, ct: *const c_void, n: size_t) -> c_int;
567     pub fn memcpy(dest: *mut c_void, src: *const c_void, n: size_t) -> *mut c_void;
568     pub fn memmove(dest: *mut c_void, src: *const c_void, n: size_t) -> *mut c_void;
569     pub fn memset(dest: *mut c_void, c: c_int, n: size_t) -> *mut c_void;
570 }
571 
572 extern "C" {
573     #[cfg_attr(target_os = "netbsd", link_name = "__getpwnam50")]
574     pub fn getpwnam(name: *const ::c_char) -> *mut passwd;
575     #[cfg_attr(target_os = "netbsd", link_name = "__getpwuid50")]
576     pub fn getpwuid(uid: ::uid_t) -> *mut passwd;
577 
578     pub fn fprintf(stream: *mut ::FILE, format: *const ::c_char, ...) -> ::c_int;
579     pub fn printf(format: *const ::c_char, ...) -> ::c_int;
580     pub fn snprintf(s: *mut ::c_char, n: ::size_t, format: *const ::c_char, ...) -> ::c_int;
581     pub fn sprintf(s: *mut ::c_char, format: *const ::c_char, ...) -> ::c_int;
582     #[cfg_attr(
583         all(target_os = "linux", not(target_env = "uclibc")),
584         link_name = "__isoc99_fscanf"
585     )]
586     pub fn fscanf(stream: *mut ::FILE, format: *const ::c_char, ...) -> ::c_int;
587     #[cfg_attr(
588         all(target_os = "linux", not(target_env = "uclibc")),
589         link_name = "__isoc99_scanf"
590     )]
591     pub fn scanf(format: *const ::c_char, ...) -> ::c_int;
592     #[cfg_attr(
593         all(target_os = "linux", not(target_env = "uclibc")),
594         link_name = "__isoc99_sscanf"
595     )]
596     pub fn sscanf(s: *const ::c_char, format: *const ::c_char, ...) -> ::c_int;
597     pub fn getchar_unlocked() -> ::c_int;
598     pub fn putchar_unlocked(c: ::c_int) -> ::c_int;
599 
600     #[cfg(not(all(
601         libc_cfg_target_vendor,
602         target_arch = "powerpc",
603         target_vendor = "nintendo"
604     )))]
605     #[cfg_attr(target_os = "netbsd", link_name = "__socket30")]
606     #[cfg_attr(
607         any(target_os = "illumos", target_os = "solaris"),
608         link_name = "__xnet_socket"
609     )]
610     #[cfg_attr(target_os = "espidf", link_name = "lwip_socket")]
611     pub fn socket(domain: ::c_int, ty: ::c_int, protocol: ::c_int) -> ::c_int;
612     #[cfg(not(all(
613         libc_cfg_target_vendor,
614         target_arch = "powerpc",
615         target_vendor = "nintendo"
616     )))]
617     #[cfg_attr(
618         all(target_os = "macos", target_arch = "x86"),
619         link_name = "connect$UNIX2003"
620     )]
621     #[cfg_attr(
622         any(target_os = "illumos", target_os = "solaris"),
623         link_name = "__xnet_connect"
624     )]
625     #[cfg_attr(target_os = "espidf", link_name = "lwip_connect")]
626     pub fn connect(socket: ::c_int, address: *const sockaddr, len: socklen_t) -> ::c_int;
627     #[cfg_attr(
628         all(target_os = "macos", target_arch = "x86"),
629         link_name = "listen$UNIX2003"
630     )]
631     #[cfg_attr(target_os = "espidf", link_name = "lwip_listen")]
632     pub fn listen(socket: ::c_int, backlog: ::c_int) -> ::c_int;
633     #[cfg(not(all(
634         libc_cfg_target_vendor,
635         target_arch = "powerpc",
636         target_vendor = "nintendo"
637     )))]
638     #[cfg_attr(
639         all(target_os = "macos", target_arch = "x86"),
640         link_name = "accept$UNIX2003"
641     )]
642     #[cfg_attr(target_os = "espidf", link_name = "lwip_accept")]
643     pub fn accept(socket: ::c_int, address: *mut sockaddr, address_len: *mut socklen_t) -> ::c_int;
644     #[cfg(not(all(
645         libc_cfg_target_vendor,
646         target_arch = "powerpc",
647         target_vendor = "nintendo"
648     )))]
649     #[cfg_attr(
650         all(target_os = "macos", target_arch = "x86"),
651         link_name = "getpeername$UNIX2003"
652     )]
653     #[cfg_attr(target_os = "espidf", link_name = "lwip_getpeername")]
654     pub fn getpeername(
655         socket: ::c_int,
656         address: *mut sockaddr,
657         address_len: *mut socklen_t,
658     ) -> ::c_int;
659     #[cfg(not(all(
660         libc_cfg_target_vendor,
661         target_arch = "powerpc",
662         target_vendor = "nintendo"
663     )))]
664     #[cfg_attr(
665         all(target_os = "macos", target_arch = "x86"),
666         link_name = "getsockname$UNIX2003"
667     )]
668     #[cfg_attr(target_os = "espidf", link_name = "lwip_getsockname")]
669     pub fn getsockname(
670         socket: ::c_int,
671         address: *mut sockaddr,
672         address_len: *mut socklen_t,
673     ) -> ::c_int;
674     #[cfg_attr(target_os = "espidf", link_name = "lwip_setsockopt")]
675     pub fn setsockopt(
676         socket: ::c_int,
677         level: ::c_int,
678         name: ::c_int,
679         value: *const ::c_void,
680         option_len: socklen_t,
681     ) -> ::c_int;
682     #[cfg_attr(
683         all(target_os = "macos", target_arch = "x86"),
684         link_name = "socketpair$UNIX2003"
685     )]
686     #[cfg_attr(
687         any(target_os = "illumos", target_os = "solaris"),
688         link_name = "__xnet_socketpair"
689     )]
690     pub fn socketpair(
691         domain: ::c_int,
692         type_: ::c_int,
693         protocol: ::c_int,
694         socket_vector: *mut ::c_int,
695     ) -> ::c_int;
696     #[cfg(not(all(
697         libc_cfg_target_vendor,
698         target_arch = "powerpc",
699         target_vendor = "nintendo"
700     )))]
701     #[cfg_attr(
702         all(target_os = "macos", target_arch = "x86"),
703         link_name = "sendto$UNIX2003"
704     )]
705     #[cfg_attr(
706         any(target_os = "illumos", target_os = "solaris"),
707         link_name = "__xnet_sendto"
708     )]
709     #[cfg_attr(target_os = "espidf", link_name = "lwip_sendto")]
710     pub fn sendto(
711         socket: ::c_int,
712         buf: *const ::c_void,
713         len: ::size_t,
714         flags: ::c_int,
715         addr: *const sockaddr,
716         addrlen: socklen_t,
717     ) -> ::ssize_t;
718     #[cfg_attr(target_os = "espidf", link_name = "lwip_shutdown")]
719     pub fn shutdown(socket: ::c_int, how: ::c_int) -> ::c_int;
720 
721     #[cfg_attr(
722         all(target_os = "macos", target_arch = "x86"),
723         link_name = "chmod$UNIX2003"
724     )]
725     pub fn chmod(path: *const c_char, mode: mode_t) -> ::c_int;
726     #[cfg_attr(
727         all(target_os = "macos", target_arch = "x86"),
728         link_name = "fchmod$UNIX2003"
729     )]
730     pub fn fchmod(fd: ::c_int, mode: mode_t) -> ::c_int;
731 
732     #[cfg_attr(
733         all(target_os = "macos", not(target_arch = "aarch64")),
734         link_name = "fstat$INODE64"
735     )]
736     #[cfg_attr(target_os = "netbsd", link_name = "__fstat50")]
737     #[cfg_attr(
738         all(target_os = "freebsd", any(freebsd11, freebsd10)),
739         link_name = "fstat@FBSD_1.0"
740     )]
741     pub fn fstat(fildes: ::c_int, buf: *mut stat) -> ::c_int;
742 
743     pub fn mkdir(path: *const c_char, mode: mode_t) -> ::c_int;
744 
745     #[cfg_attr(
746         all(target_os = "macos", not(target_arch = "aarch64")),
747         link_name = "stat$INODE64"
748     )]
749     #[cfg_attr(target_os = "netbsd", link_name = "__stat50")]
750     #[cfg_attr(
751         all(target_os = "freebsd", any(freebsd11, freebsd10)),
752         link_name = "stat@FBSD_1.0"
753     )]
754     pub fn stat(path: *const c_char, buf: *mut stat) -> ::c_int;
755 
756     pub fn pclose(stream: *mut ::FILE) -> ::c_int;
757     #[cfg_attr(
758         all(target_os = "macos", target_arch = "x86"),
759         link_name = "fdopen$UNIX2003"
760     )]
761     pub fn fdopen(fd: ::c_int, mode: *const c_char) -> *mut ::FILE;
762     pub fn fileno(stream: *mut ::FILE) -> ::c_int;
763 
764     #[cfg_attr(
765         all(target_os = "macos", target_arch = "x86"),
766         link_name = "open$UNIX2003"
767     )]
768     pub fn open(path: *const c_char, oflag: ::c_int, ...) -> ::c_int;
769     #[cfg_attr(
770         all(target_os = "macos", target_arch = "x86"),
771         link_name = "creat$UNIX2003"
772     )]
773     pub fn creat(path: *const c_char, mode: mode_t) -> ::c_int;
774     #[cfg_attr(
775         all(target_os = "macos", target_arch = "x86"),
776         link_name = "fcntl$UNIX2003"
777     )]
778     pub fn fcntl(fd: ::c_int, cmd: ::c_int, ...) -> ::c_int;
779 
780     #[cfg_attr(
781         all(target_os = "macos", target_arch = "x86_64"),
782         link_name = "opendir$INODE64"
783     )]
784     #[cfg_attr(
785         all(target_os = "macos", target_arch = "x86"),
786         link_name = "opendir$INODE64$UNIX2003"
787     )]
788     #[cfg_attr(target_os = "netbsd", link_name = "__opendir30")]
789     pub fn opendir(dirname: *const c_char) -> *mut ::DIR;
790 
791     #[cfg_attr(
792         all(target_os = "macos", not(target_arch = "aarch64")),
793         link_name = "readdir$INODE64"
794     )]
795     #[cfg_attr(target_os = "netbsd", link_name = "__readdir30")]
796     #[cfg_attr(
797         all(target_os = "freebsd", any(freebsd11, freebsd10)),
798         link_name = "readdir@FBSD_1.0"
799     )]
800     pub fn readdir(dirp: *mut ::DIR) -> *mut ::dirent;
801     #[cfg_attr(
802         all(target_os = "macos", target_arch = "x86"),
803         link_name = "closedir$UNIX2003"
804     )]
805     pub fn closedir(dirp: *mut ::DIR) -> ::c_int;
806     #[cfg_attr(
807         all(target_os = "macos", target_arch = "x86_64"),
808         link_name = "rewinddir$INODE64"
809     )]
810     #[cfg_attr(
811         all(target_os = "macos", target_arch = "x86"),
812         link_name = "rewinddir$INODE64$UNIX2003"
813     )]
814     pub fn rewinddir(dirp: *mut ::DIR);
815 
816     pub fn fchmodat(
817         dirfd: ::c_int,
818         pathname: *const ::c_char,
819         mode: ::mode_t,
820         flags: ::c_int,
821     ) -> ::c_int;
822     pub fn fchown(fd: ::c_int, owner: ::uid_t, group: ::gid_t) -> ::c_int;
823     pub fn fchownat(
824         dirfd: ::c_int,
825         pathname: *const ::c_char,
826         owner: ::uid_t,
827         group: ::gid_t,
828         flags: ::c_int,
829     ) -> ::c_int;
830     #[cfg_attr(
831         all(target_os = "macos", not(target_arch = "aarch64")),
832         link_name = "fstatat$INODE64"
833     )]
834     #[cfg_attr(
835         all(target_os = "freebsd", any(freebsd11, freebsd10)),
836         link_name = "fstatat@FBSD_1.1"
837     )]
838     pub fn fstatat(
839         dirfd: ::c_int,
840         pathname: *const ::c_char,
841         buf: *mut stat,
842         flags: ::c_int,
843     ) -> ::c_int;
844     pub fn linkat(
845         olddirfd: ::c_int,
846         oldpath: *const ::c_char,
847         newdirfd: ::c_int,
848         newpath: *const ::c_char,
849         flags: ::c_int,
850     ) -> ::c_int;
851     pub fn renameat(
852         olddirfd: ::c_int,
853         oldpath: *const ::c_char,
854         newdirfd: ::c_int,
855         newpath: *const ::c_char,
856     ) -> ::c_int;
857     pub fn symlinkat(
858         target: *const ::c_char,
859         newdirfd: ::c_int,
860         linkpath: *const ::c_char,
861     ) -> ::c_int;
862     pub fn unlinkat(dirfd: ::c_int, pathname: *const ::c_char, flags: ::c_int) -> ::c_int;
863 
864     pub fn access(path: *const c_char, amode: ::c_int) -> ::c_int;
865     pub fn alarm(seconds: ::c_uint) -> ::c_uint;
866     pub fn chdir(dir: *const c_char) -> ::c_int;
867     pub fn fchdir(dirfd: ::c_int) -> ::c_int;
868     pub fn chown(path: *const c_char, uid: uid_t, gid: gid_t) -> ::c_int;
869     #[cfg_attr(
870         all(target_os = "macos", target_arch = "x86"),
871         link_name = "lchown$UNIX2003"
872     )]
873     pub fn lchown(path: *const c_char, uid: uid_t, gid: gid_t) -> ::c_int;
874     #[cfg_attr(
875         all(target_os = "macos", target_arch = "x86"),
876         link_name = "close$NOCANCEL$UNIX2003"
877     )]
878     #[cfg_attr(
879         all(target_os = "macos", target_arch = "x86_64"),
880         link_name = "close$NOCANCEL"
881     )]
882     pub fn close(fd: ::c_int) -> ::c_int;
883     pub fn dup(fd: ::c_int) -> ::c_int;
884     pub fn dup2(src: ::c_int, dst: ::c_int) -> ::c_int;
885     pub fn execl(path: *const c_char, arg0: *const c_char, ...) -> ::c_int;
886     pub fn execle(path: *const ::c_char, arg0: *const ::c_char, ...) -> ::c_int;
887     pub fn execlp(file: *const ::c_char, arg0: *const ::c_char, ...) -> ::c_int;
888     pub fn execv(prog: *const c_char, argv: *const *const c_char) -> ::c_int;
889     pub fn execve(
890         prog: *const c_char,
891         argv: *const *const c_char,
892         envp: *const *const c_char,
893     ) -> ::c_int;
894     pub fn execvp(c: *const c_char, argv: *const *const c_char) -> ::c_int;
895     pub fn fork() -> pid_t;
896     pub fn fpathconf(filedes: ::c_int, name: ::c_int) -> c_long;
897     pub fn getcwd(buf: *mut c_char, size: ::size_t) -> *mut c_char;
898     pub fn getegid() -> gid_t;
899     pub fn geteuid() -> uid_t;
900     pub fn getgid() -> gid_t;
901     pub fn getgroups(ngroups_max: ::c_int, groups: *mut gid_t) -> ::c_int;
902     #[cfg_attr(target_os = "illumos", link_name = "getloginx")]
903     pub fn getlogin() -> *mut c_char;
904     #[cfg_attr(
905         all(target_os = "macos", target_arch = "x86"),
906         link_name = "getopt$UNIX2003"
907     )]
908     pub fn getopt(argc: ::c_int, argv: *const *mut c_char, optstr: *const c_char) -> ::c_int;
909     pub fn getpgid(pid: pid_t) -> pid_t;
910     pub fn getpgrp() -> pid_t;
911     pub fn getpid() -> pid_t;
912     pub fn getppid() -> pid_t;
913     pub fn getuid() -> uid_t;
914     pub fn isatty(fd: ::c_int) -> ::c_int;
915     pub fn link(src: *const c_char, dst: *const c_char) -> ::c_int;
916     pub fn lseek(fd: ::c_int, offset: off_t, whence: ::c_int) -> off_t;
917     pub fn pathconf(path: *const c_char, name: ::c_int) -> c_long;
918     pub fn pipe(fds: *mut ::c_int) -> ::c_int;
919     pub fn posix_memalign(memptr: *mut *mut ::c_void, align: ::size_t, size: ::size_t) -> ::c_int;
920     #[cfg_attr(
921         all(target_os = "macos", target_arch = "x86"),
922         link_name = "read$UNIX2003"
923     )]
924     pub fn read(fd: ::c_int, buf: *mut ::c_void, count: ::size_t) -> ::ssize_t;
925     pub fn rmdir(path: *const c_char) -> ::c_int;
926     pub fn seteuid(uid: uid_t) -> ::c_int;
927     pub fn setegid(gid: gid_t) -> ::c_int;
928     pub fn setgid(gid: gid_t) -> ::c_int;
929     pub fn setpgid(pid: pid_t, pgid: pid_t) -> ::c_int;
930     pub fn setsid() -> pid_t;
931     pub fn setuid(uid: uid_t) -> ::c_int;
932     pub fn setreuid(ruid: uid_t, euid: uid_t) -> ::c_int;
933     pub fn setregid(rgid: gid_t, egid: gid_t) -> ::c_int;
934     #[cfg_attr(
935         all(target_os = "macos", target_arch = "x86"),
936         link_name = "sleep$UNIX2003"
937     )]
938     pub fn sleep(secs: ::c_uint) -> ::c_uint;
939     #[cfg_attr(
940         all(target_os = "macos", target_arch = "x86"),
941         link_name = "nanosleep$UNIX2003"
942     )]
943     #[cfg_attr(target_os = "netbsd", link_name = "__nanosleep50")]
944     pub fn nanosleep(rqtp: *const timespec, rmtp: *mut timespec) -> ::c_int;
945     pub fn tcgetpgrp(fd: ::c_int) -> pid_t;
946     pub fn tcsetpgrp(fd: ::c_int, pgrp: ::pid_t) -> ::c_int;
947     pub fn ttyname(fd: ::c_int) -> *mut c_char;
948     #[cfg_attr(
949         all(target_os = "macos", target_arch = "x86"),
950         link_name = "ttyname_r$UNIX2003"
951     )]
952     #[cfg_attr(target_os = "illumos", link_name = "__posix_ttyname_r")]
953     pub fn ttyname_r(fd: ::c_int, buf: *mut c_char, buflen: ::size_t) -> ::c_int;
954     pub fn unlink(c: *const c_char) -> ::c_int;
955     #[cfg_attr(
956         all(target_os = "macos", target_arch = "x86"),
957         link_name = "wait$UNIX2003"
958     )]
959     pub fn wait(status: *mut ::c_int) -> pid_t;
960     #[cfg_attr(
961         all(target_os = "macos", target_arch = "x86"),
962         link_name = "waitpid$UNIX2003"
963     )]
964     pub fn waitpid(pid: pid_t, status: *mut ::c_int, options: ::c_int) -> pid_t;
965     #[cfg_attr(
966         all(target_os = "macos", target_arch = "x86"),
967         link_name = "write$UNIX2003"
968     )]
969     pub fn write(fd: ::c_int, buf: *const ::c_void, count: ::size_t) -> ::ssize_t;
970     #[cfg_attr(
971         all(target_os = "macos", target_arch = "x86"),
972         link_name = "pread$UNIX2003"
973     )]
974     pub fn pread(fd: ::c_int, buf: *mut ::c_void, count: ::size_t, offset: off_t) -> ::ssize_t;
975     #[cfg_attr(
976         all(target_os = "macos", target_arch = "x86"),
977         link_name = "pwrite$UNIX2003"
978     )]
979     pub fn pwrite(fd: ::c_int, buf: *const ::c_void, count: ::size_t, offset: off_t) -> ::ssize_t;
980     pub fn umask(mask: mode_t) -> mode_t;
981 
982     #[cfg_attr(target_os = "netbsd", link_name = "__utime50")]
983     pub fn utime(file: *const c_char, buf: *const utimbuf) -> ::c_int;
984 
985     #[cfg_attr(
986         all(target_os = "macos", target_arch = "x86"),
987         link_name = "kill$UNIX2003"
988     )]
989     pub fn kill(pid: pid_t, sig: ::c_int) -> ::c_int;
990     #[cfg_attr(
991         all(target_os = "macos", target_arch = "x86"),
992         link_name = "killpg$UNIX2003"
993     )]
994     pub fn killpg(pgrp: pid_t, sig: ::c_int) -> ::c_int;
995 
996     pub fn mlock(addr: *const ::c_void, len: ::size_t) -> ::c_int;
997     pub fn munlock(addr: *const ::c_void, len: ::size_t) -> ::c_int;
998     pub fn mlockall(flags: ::c_int) -> ::c_int;
999     pub fn munlockall() -> ::c_int;
1000 
1001     #[cfg_attr(
1002         all(target_os = "macos", target_arch = "x86"),
1003         link_name = "mmap$UNIX2003"
1004     )]
1005     pub fn mmap(
1006         addr: *mut ::c_void,
1007         len: ::size_t,
1008         prot: ::c_int,
1009         flags: ::c_int,
1010         fd: ::c_int,
1011         offset: off_t,
1012     ) -> *mut ::c_void;
1013     #[cfg_attr(
1014         all(target_os = "macos", target_arch = "x86"),
1015         link_name = "munmap$UNIX2003"
1016     )]
1017     pub fn munmap(addr: *mut ::c_void, len: ::size_t) -> ::c_int;
1018 
1019     pub fn if_nametoindex(ifname: *const c_char) -> ::c_uint;
1020     pub fn if_indextoname(ifindex: ::c_uint, ifname: *mut ::c_char) -> *mut ::c_char;
1021 
1022     #[cfg_attr(
1023         all(target_os = "macos", not(target_arch = "aarch64")),
1024         link_name = "lstat$INODE64"
1025     )]
1026     #[cfg_attr(target_os = "netbsd", link_name = "__lstat50")]
1027     #[cfg_attr(
1028         all(target_os = "freebsd", any(freebsd11, freebsd10)),
1029         link_name = "lstat@FBSD_1.0"
1030     )]
1031     pub fn lstat(path: *const c_char, buf: *mut stat) -> ::c_int;
1032 
1033     #[cfg_attr(
1034         all(target_os = "macos", target_arch = "x86"),
1035         link_name = "fsync$UNIX2003"
1036     )]
1037     pub fn fsync(fd: ::c_int) -> ::c_int;
1038 
1039     #[cfg_attr(
1040         all(target_os = "macos", target_arch = "x86"),
1041         link_name = "setenv$UNIX2003"
1042     )]
1043     pub fn setenv(name: *const c_char, val: *const c_char, overwrite: ::c_int) -> ::c_int;
1044     #[cfg_attr(
1045         all(target_os = "macos", target_arch = "x86"),
1046         link_name = "unsetenv$UNIX2003"
1047     )]
1048     #[cfg_attr(target_os = "netbsd", link_name = "__unsetenv13")]
1049     pub fn unsetenv(name: *const c_char) -> ::c_int;
1050 
1051     pub fn symlink(path1: *const c_char, path2: *const c_char) -> ::c_int;
1052 
1053     pub fn truncate(path: *const c_char, length: off_t) -> ::c_int;
1054     pub fn ftruncate(fd: ::c_int, length: off_t) -> ::c_int;
1055 
1056     pub fn signal(signum: ::c_int, handler: sighandler_t) -> sighandler_t;
1057 
1058     #[cfg_attr(target_os = "netbsd", link_name = "__getrusage50")]
1059     pub fn getrusage(resource: ::c_int, usage: *mut rusage) -> ::c_int;
1060 
1061     #[cfg_attr(
1062         any(
1063             target_os = "macos",
1064             target_os = "ios",
1065             target_os = "tvos",
1066             target_os = "watchos",
1067             target_os = "visionos"
1068         ),
1069         link_name = "realpath$DARWIN_EXTSN"
1070     )]
1071     pub fn realpath(pathname: *const ::c_char, resolved: *mut ::c_char) -> *mut ::c_char;
1072 
1073     pub fn flock(fd: ::c_int, operation: ::c_int) -> ::c_int;
1074 
1075     #[cfg_attr(target_os = "netbsd", link_name = "__times13")]
1076     pub fn times(buf: *mut ::tms) -> ::clock_t;
1077 
1078     pub fn pthread_self() -> ::pthread_t;
1079     pub fn pthread_equal(t1: ::pthread_t, t2: ::pthread_t) -> ::c_int;
1080     #[cfg_attr(
1081         all(target_os = "macos", target_arch = "x86"),
1082         link_name = "pthread_join$UNIX2003"
1083     )]
1084     pub fn pthread_join(native: ::pthread_t, value: *mut *mut ::c_void) -> ::c_int;
1085     pub fn pthread_exit(value: *mut ::c_void) -> !;
1086     pub fn pthread_attr_init(attr: *mut ::pthread_attr_t) -> ::c_int;
1087     pub fn pthread_attr_destroy(attr: *mut ::pthread_attr_t) -> ::c_int;
1088     pub fn pthread_attr_getstacksize(
1089         attr: *const ::pthread_attr_t,
1090         stacksize: *mut ::size_t,
1091     ) -> ::c_int;
1092     pub fn pthread_attr_setstacksize(attr: *mut ::pthread_attr_t, stack_size: ::size_t) -> ::c_int;
1093     pub fn pthread_attr_setdetachstate(attr: *mut ::pthread_attr_t, state: ::c_int) -> ::c_int;
1094     pub fn pthread_detach(thread: ::pthread_t) -> ::c_int;
1095     #[cfg_attr(target_os = "netbsd", link_name = "__libc_thr_yield")]
1096     pub fn sched_yield() -> ::c_int;
1097     pub fn pthread_key_create(
1098         key: *mut pthread_key_t,
1099         dtor: ::Option<unsafe extern "C" fn(*mut ::c_void)>,
1100     ) -> ::c_int;
1101     pub fn pthread_key_delete(key: pthread_key_t) -> ::c_int;
1102     pub fn pthread_getspecific(key: pthread_key_t) -> *mut ::c_void;
1103     pub fn pthread_setspecific(key: pthread_key_t, value: *const ::c_void) -> ::c_int;
1104     pub fn pthread_mutex_init(
1105         lock: *mut pthread_mutex_t,
1106         attr: *const pthread_mutexattr_t,
1107     ) -> ::c_int;
1108     pub fn pthread_mutex_destroy(lock: *mut pthread_mutex_t) -> ::c_int;
1109     pub fn pthread_mutex_lock(lock: *mut pthread_mutex_t) -> ::c_int;
1110     pub fn pthread_mutex_trylock(lock: *mut pthread_mutex_t) -> ::c_int;
1111     pub fn pthread_mutex_unlock(lock: *mut pthread_mutex_t) -> ::c_int;
1112 
1113     pub fn pthread_mutexattr_init(attr: *mut pthread_mutexattr_t) -> ::c_int;
1114     #[cfg_attr(
1115         all(target_os = "macos", target_arch = "x86"),
1116         link_name = "pthread_mutexattr_destroy$UNIX2003"
1117     )]
1118     pub fn pthread_mutexattr_destroy(attr: *mut pthread_mutexattr_t) -> ::c_int;
1119     pub fn pthread_mutexattr_settype(attr: *mut pthread_mutexattr_t, _type: ::c_int) -> ::c_int;
1120 
1121     #[cfg_attr(
1122         all(target_os = "macos", target_arch = "x86"),
1123         link_name = "pthread_cond_init$UNIX2003"
1124     )]
1125     pub fn pthread_cond_init(cond: *mut pthread_cond_t, attr: *const pthread_condattr_t)
1126         -> ::c_int;
1127     #[cfg_attr(
1128         all(target_os = "macos", target_arch = "x86"),
1129         link_name = "pthread_cond_wait$UNIX2003"
1130     )]
1131     pub fn pthread_cond_wait(cond: *mut pthread_cond_t, lock: *mut pthread_mutex_t) -> ::c_int;
1132     #[cfg_attr(
1133         all(target_os = "macos", target_arch = "x86"),
1134         link_name = "pthread_cond_timedwait$UNIX2003"
1135     )]
1136     pub fn pthread_cond_timedwait(
1137         cond: *mut pthread_cond_t,
1138         lock: *mut pthread_mutex_t,
1139         abstime: *const ::timespec,
1140     ) -> ::c_int;
1141     pub fn pthread_cond_signal(cond: *mut pthread_cond_t) -> ::c_int;
1142     pub fn pthread_cond_broadcast(cond: *mut pthread_cond_t) -> ::c_int;
1143     pub fn pthread_cond_destroy(cond: *mut pthread_cond_t) -> ::c_int;
1144     pub fn pthread_condattr_init(attr: *mut pthread_condattr_t) -> ::c_int;
1145     pub fn pthread_condattr_destroy(attr: *mut pthread_condattr_t) -> ::c_int;
1146     #[cfg_attr(
1147         all(target_os = "macos", target_arch = "x86"),
1148         link_name = "pthread_rwlock_init$UNIX2003"
1149     )]
1150     pub fn pthread_rwlock_init(
1151         lock: *mut pthread_rwlock_t,
1152         attr: *const pthread_rwlockattr_t,
1153     ) -> ::c_int;
1154     #[cfg_attr(
1155         all(target_os = "macos", target_arch = "x86"),
1156         link_name = "pthread_rwlock_destroy$UNIX2003"
1157     )]
1158     pub fn pthread_rwlock_destroy(lock: *mut pthread_rwlock_t) -> ::c_int;
1159     #[cfg_attr(
1160         all(target_os = "macos", target_arch = "x86"),
1161         link_name = "pthread_rwlock_rdlock$UNIX2003"
1162     )]
1163     pub fn pthread_rwlock_rdlock(lock: *mut pthread_rwlock_t) -> ::c_int;
1164     #[cfg_attr(
1165         all(target_os = "macos", target_arch = "x86"),
1166         link_name = "pthread_rwlock_tryrdlock$UNIX2003"
1167     )]
1168     pub fn pthread_rwlock_tryrdlock(lock: *mut pthread_rwlock_t) -> ::c_int;
1169     #[cfg_attr(
1170         all(target_os = "macos", target_arch = "x86"),
1171         link_name = "pthread_rwlock_wrlock$UNIX2003"
1172     )]
1173     pub fn pthread_rwlock_wrlock(lock: *mut pthread_rwlock_t) -> ::c_int;
1174     #[cfg_attr(
1175         all(target_os = "macos", target_arch = "x86"),
1176         link_name = "pthread_rwlock_trywrlock$UNIX2003"
1177     )]
1178     pub fn pthread_rwlock_trywrlock(lock: *mut pthread_rwlock_t) -> ::c_int;
1179     #[cfg_attr(
1180         all(target_os = "macos", target_arch = "x86"),
1181         link_name = "pthread_rwlock_unlock$UNIX2003"
1182     )]
1183     pub fn pthread_rwlock_unlock(lock: *mut pthread_rwlock_t) -> ::c_int;
1184     pub fn pthread_rwlockattr_init(attr: *mut pthread_rwlockattr_t) -> ::c_int;
1185     pub fn pthread_rwlockattr_destroy(attr: *mut pthread_rwlockattr_t) -> ::c_int;
1186 
1187     #[cfg_attr(
1188         any(target_os = "illumos", target_os = "solaris"),
1189         link_name = "__xnet_getsockopt"
1190     )]
1191     #[cfg_attr(target_os = "espidf", link_name = "lwip_getsockopt")]
1192     pub fn getsockopt(
1193         sockfd: ::c_int,
1194         level: ::c_int,
1195         optname: ::c_int,
1196         optval: *mut ::c_void,
1197         optlen: *mut ::socklen_t,
1198     ) -> ::c_int;
1199     pub fn raise(signum: ::c_int) -> ::c_int;
1200 
1201     #[cfg_attr(target_os = "netbsd", link_name = "__utimes50")]
1202     pub fn utimes(filename: *const ::c_char, times: *const ::timeval) -> ::c_int;
1203     pub fn dlopen(filename: *const ::c_char, flag: ::c_int) -> *mut ::c_void;
1204     pub fn dlerror() -> *mut ::c_char;
1205     pub fn dlsym(handle: *mut ::c_void, symbol: *const ::c_char) -> *mut ::c_void;
1206     pub fn dlclose(handle: *mut ::c_void) -> ::c_int;
1207 
1208     #[cfg(not(all(
1209         libc_cfg_target_vendor,
1210         target_arch = "powerpc",
1211         target_vendor = "nintendo"
1212     )))]
1213     #[cfg_attr(
1214         any(target_os = "illumos", target_os = "solaris"),
1215         link_name = "__xnet_getaddrinfo"
1216     )]
1217     #[cfg_attr(target_os = "espidf", link_name = "lwip_getaddrinfo")]
1218     pub fn getaddrinfo(
1219         node: *const c_char,
1220         service: *const c_char,
1221         hints: *const addrinfo,
1222         res: *mut *mut addrinfo,
1223     ) -> ::c_int;
1224     #[cfg(not(all(
1225         libc_cfg_target_vendor,
1226         target_arch = "powerpc",
1227         target_vendor = "nintendo"
1228     )))]
1229     #[cfg_attr(target_os = "espidf", link_name = "lwip_freeaddrinfo")]
1230     pub fn freeaddrinfo(res: *mut addrinfo);
1231     pub fn hstrerror(errcode: ::c_int) -> *const ::c_char;
1232     pub fn gai_strerror(errcode: ::c_int) -> *const ::c_char;
1233     #[cfg_attr(
1234         any(
1235             all(
1236                 target_os = "linux",
1237                 not(any(target_env = "musl", target_env = "ohos"))
1238             ),
1239             target_os = "freebsd",
1240             target_os = "dragonfly",
1241             target_os = "haiku"
1242         ),
1243         link_name = "__res_init"
1244     )]
1245     #[cfg_attr(
1246         any(
1247             target_os = "macos",
1248             target_os = "ios",
1249             target_os = "tvos",
1250             target_os = "watchos",
1251             target_os = "visionos"
1252         ),
1253         link_name = "res_9_init"
1254     )]
1255     pub fn res_init() -> ::c_int;
1256 
1257     #[cfg_attr(target_os = "netbsd", link_name = "__gmtime_r50")]
1258     #[cfg_attr(any(target_env = "musl", target_env = "ohos"), allow(deprecated))]
1259     // FIXME: for `time_t`
1260     pub fn gmtime_r(time_p: *const time_t, result: *mut tm) -> *mut tm;
1261     #[cfg_attr(target_os = "netbsd", link_name = "__localtime_r50")]
1262     #[cfg_attr(any(target_env = "musl", target_env = "ohos"), allow(deprecated))]
1263     // FIXME: for `time_t`
1264     pub fn localtime_r(time_p: *const time_t, result: *mut tm) -> *mut tm;
1265     #[cfg_attr(
1266         all(target_os = "macos", target_arch = "x86"),
1267         link_name = "mktime$UNIX2003"
1268     )]
1269     #[cfg_attr(target_os = "netbsd", link_name = "__mktime50")]
1270     #[cfg_attr(any(target_env = "musl", target_env = "ohos"), allow(deprecated))]
1271     // FIXME: for `time_t`
1272     pub fn mktime(tm: *mut tm) -> time_t;
1273     #[cfg_attr(target_os = "netbsd", link_name = "__time50")]
1274     #[cfg_attr(any(target_env = "musl", target_env = "ohos"), allow(deprecated))]
1275     // FIXME: for `time_t`
1276     pub fn time(time: *mut time_t) -> time_t;
1277     #[cfg_attr(target_os = "netbsd", link_name = "__gmtime50")]
1278     #[cfg_attr(any(target_env = "musl", target_env = "ohos"), allow(deprecated))]
1279     // FIXME: for `time_t`
1280     pub fn gmtime(time_p: *const time_t) -> *mut tm;
1281     #[cfg_attr(target_os = "netbsd", link_name = "__locatime50")]
1282     #[cfg_attr(any(target_env = "musl", target_env = "ohos"), allow(deprecated))]
1283     // FIXME: for `time_t`
1284     pub fn localtime(time_p: *const time_t) -> *mut tm;
1285     #[cfg_attr(target_os = "netbsd", link_name = "__difftime50")]
1286     #[cfg_attr(any(target_env = "musl", target_env = "ohos"), allow(deprecated))]
1287     // FIXME: for `time_t`
1288     pub fn difftime(time1: time_t, time0: time_t) -> ::c_double;
1289     #[cfg_attr(target_os = "netbsd", link_name = "__timegm50")]
1290     #[cfg_attr(any(target_env = "musl", target_env = "ohos"), allow(deprecated))]
1291     // FIXME: for `time_t`
1292     pub fn timegm(tm: *mut ::tm) -> time_t;
1293 
1294     #[cfg_attr(target_os = "netbsd", link_name = "__mknod50")]
1295     #[cfg_attr(
1296         all(target_os = "freebsd", any(freebsd11, freebsd10)),
1297         link_name = "mknod@FBSD_1.0"
1298     )]
1299     pub fn mknod(pathname: *const ::c_char, mode: ::mode_t, dev: ::dev_t) -> ::c_int;
1300     pub fn gethostname(name: *mut ::c_char, len: ::size_t) -> ::c_int;
1301     pub fn endservent();
1302     pub fn getservbyname(name: *const ::c_char, proto: *const ::c_char) -> *mut servent;
1303     pub fn getservbyport(port: ::c_int, proto: *const ::c_char) -> *mut servent;
1304     pub fn getservent() -> *mut servent;
1305     pub fn setservent(stayopen: ::c_int);
1306     pub fn getprotobyname(name: *const ::c_char) -> *mut protoent;
1307     pub fn getprotobynumber(proto: ::c_int) -> *mut protoent;
1308     pub fn chroot(name: *const ::c_char) -> ::c_int;
1309     #[cfg_attr(
1310         all(target_os = "macos", target_arch = "x86"),
1311         link_name = "usleep$UNIX2003"
1312     )]
1313     pub fn usleep(secs: ::c_uint) -> ::c_int;
1314     #[cfg_attr(
1315         all(target_os = "macos", target_arch = "x86"),
1316         link_name = "send$UNIX2003"
1317     )]
1318     #[cfg_attr(target_os = "espidf", link_name = "lwip_send")]
1319     pub fn send(socket: ::c_int, buf: *const ::c_void, len: ::size_t, flags: ::c_int) -> ::ssize_t;
1320     #[cfg_attr(
1321         all(target_os = "macos", target_arch = "x86"),
1322         link_name = "recv$UNIX2003"
1323     )]
1324     #[cfg_attr(target_os = "espidf", link_name = "lwip_recv")]
1325     pub fn recv(socket: ::c_int, buf: *mut ::c_void, len: ::size_t, flags: ::c_int) -> ::ssize_t;
1326     #[cfg_attr(
1327         all(target_os = "macos", target_arch = "x86"),
1328         link_name = "putenv$UNIX2003"
1329     )]
1330     #[cfg_attr(target_os = "netbsd", link_name = "__putenv50")]
1331     pub fn putenv(string: *mut c_char) -> ::c_int;
1332     #[cfg_attr(
1333         all(target_os = "macos", target_arch = "x86"),
1334         link_name = "poll$UNIX2003"
1335     )]
1336     pub fn poll(fds: *mut pollfd, nfds: nfds_t, timeout: ::c_int) -> ::c_int;
1337     #[cfg_attr(
1338         all(target_os = "macos", target_arch = "x86_64"),
1339         link_name = "select$1050"
1340     )]
1341     #[cfg_attr(
1342         all(target_os = "macos", target_arch = "x86"),
1343         link_name = "select$UNIX2003"
1344     )]
1345     #[cfg_attr(target_os = "netbsd", link_name = "__select50")]
1346     pub fn select(
1347         nfds: ::c_int,
1348         readfds: *mut fd_set,
1349         writefds: *mut fd_set,
1350         errorfds: *mut fd_set,
1351         timeout: *mut timeval,
1352     ) -> ::c_int;
1353     #[cfg_attr(target_os = "netbsd", link_name = "__setlocale50")]
1354     pub fn setlocale(category: ::c_int, locale: *const ::c_char) -> *mut ::c_char;
1355     pub fn localeconv() -> *mut lconv;
1356 
1357     #[cfg_attr(
1358         all(target_os = "macos", target_arch = "x86"),
1359         link_name = "sem_wait$UNIX2003"
1360     )]
1361     pub fn sem_wait(sem: *mut sem_t) -> ::c_int;
1362     pub fn sem_trywait(sem: *mut sem_t) -> ::c_int;
1363     pub fn sem_post(sem: *mut sem_t) -> ::c_int;
1364     pub fn statvfs(path: *const c_char, buf: *mut statvfs) -> ::c_int;
1365     pub fn fstatvfs(fd: ::c_int, buf: *mut statvfs) -> ::c_int;
1366 
1367     #[cfg_attr(target_os = "netbsd", link_name = "__sigemptyset14")]
1368     pub fn sigemptyset(set: *mut sigset_t) -> ::c_int;
1369     #[cfg_attr(target_os = "netbsd", link_name = "__sigaddset14")]
1370     pub fn sigaddset(set: *mut sigset_t, signum: ::c_int) -> ::c_int;
1371     #[cfg_attr(target_os = "netbsd", link_name = "__sigfillset14")]
1372     pub fn sigfillset(set: *mut sigset_t) -> ::c_int;
1373     #[cfg_attr(target_os = "netbsd", link_name = "__sigdelset14")]
1374     pub fn sigdelset(set: *mut sigset_t, signum: ::c_int) -> ::c_int;
1375     #[cfg_attr(target_os = "netbsd", link_name = "__sigismember14")]
1376     pub fn sigismember(set: *const sigset_t, signum: ::c_int) -> ::c_int;
1377 
1378     #[cfg_attr(target_os = "netbsd", link_name = "__sigprocmask14")]
1379     pub fn sigprocmask(how: ::c_int, set: *const sigset_t, oldset: *mut sigset_t) -> ::c_int;
1380     #[cfg_attr(target_os = "netbsd", link_name = "__sigpending14")]
1381     pub fn sigpending(set: *mut sigset_t) -> ::c_int;
1382 
1383     pub fn sysconf(name: ::c_int) -> ::c_long;
1384 
1385     pub fn mkfifo(path: *const c_char, mode: mode_t) -> ::c_int;
1386 
1387     pub fn fseeko(stream: *mut ::FILE, offset: ::off_t, whence: ::c_int) -> ::c_int;
1388     pub fn ftello(stream: *mut ::FILE) -> ::off_t;
1389     #[cfg_attr(
1390         all(target_os = "macos", target_arch = "x86"),
1391         link_name = "tcdrain$UNIX2003"
1392     )]
1393     pub fn tcdrain(fd: ::c_int) -> ::c_int;
1394     pub fn cfgetispeed(termios: *const ::termios) -> ::speed_t;
1395     pub fn cfgetospeed(termios: *const ::termios) -> ::speed_t;
1396     pub fn cfsetispeed(termios: *mut ::termios, speed: ::speed_t) -> ::c_int;
1397     pub fn cfsetospeed(termios: *mut ::termios, speed: ::speed_t) -> ::c_int;
1398     pub fn tcgetattr(fd: ::c_int, termios: *mut ::termios) -> ::c_int;
1399     pub fn tcsetattr(fd: ::c_int, optional_actions: ::c_int, termios: *const ::termios) -> ::c_int;
1400     pub fn tcflow(fd: ::c_int, action: ::c_int) -> ::c_int;
1401     pub fn tcflush(fd: ::c_int, action: ::c_int) -> ::c_int;
1402     pub fn tcgetsid(fd: ::c_int) -> ::pid_t;
1403     pub fn tcsendbreak(fd: ::c_int, duration: ::c_int) -> ::c_int;
1404     pub fn mkstemp(template: *mut ::c_char) -> ::c_int;
1405     pub fn mkdtemp(template: *mut ::c_char) -> *mut ::c_char;
1406 
1407     pub fn tmpnam(ptr: *mut ::c_char) -> *mut ::c_char;
1408 
1409     pub fn openlog(ident: *const ::c_char, logopt: ::c_int, facility: ::c_int);
1410     pub fn closelog();
1411     pub fn setlogmask(maskpri: ::c_int) -> ::c_int;
1412     #[cfg_attr(target_os = "macos", link_name = "syslog$DARWIN_EXTSN")]
1413     pub fn syslog(priority: ::c_int, message: *const ::c_char, ...);
1414     #[cfg_attr(
1415         all(target_os = "macos", target_arch = "x86"),
1416         link_name = "nice$UNIX2003"
1417     )]
1418     pub fn nice(incr: ::c_int) -> ::c_int;
1419 
1420     pub fn grantpt(fd: ::c_int) -> ::c_int;
1421     pub fn posix_openpt(flags: ::c_int) -> ::c_int;
1422     pub fn ptsname(fd: ::c_int) -> *mut ::c_char;
1423     pub fn unlockpt(fd: ::c_int) -> ::c_int;
1424 
1425     pub fn strcasestr(cs: *const c_char, ct: *const c_char) -> *mut c_char;
1426     pub fn getline(lineptr: *mut *mut c_char, n: *mut size_t, stream: *mut FILE) -> ssize_t;
1427 
1428     pub fn lockf(fd: ::c_int, cmd: ::c_int, len: ::off_t) -> ::c_int;
1429 
1430 }
1431 
1432 cfg_if! {
1433     if #[cfg(not(any(target_os = "emscripten",
1434                      target_os = "android",
1435                      target_os = "haiku",
1436                      target_os = "nto")))] {
1437         extern "C" {
1438             pub fn adjtime(delta: *const timeval, olddelta: *mut timeval) -> ::c_int;
1439         }
1440     }
1441 }
1442 
1443 cfg_if! {
1444     if #[cfg(not(any(target_os = "emscripten",
1445                      target_os = "android",
1446                      target_os = "nto")))] {
1447         extern "C" {
1448             pub fn stpncpy(dst: *mut c_char, src: *const c_char, n: size_t) -> *mut c_char;
1449         }
1450     }
1451 }
1452 
1453 cfg_if! {
1454     if #[cfg(not(target_os = "aix"))] {
1455         extern "C" {
1456             pub fn dladdr(addr: *const ::c_void, info: *mut Dl_info) -> ::c_int;
1457         }
1458     }
1459 }
1460 
1461 cfg_if! {
1462     if #[cfg(not(any(target_env = "uclibc", target_os = "nto")))] {
1463         extern "C" {
1464             pub fn open_wmemstream(
1465                 ptr: *mut *mut wchar_t,
1466                 sizeloc: *mut size_t,
1467             ) -> *mut FILE;
1468         }
1469     }
1470 }
1471 
1472 cfg_if! {
1473     if #[cfg(not(target_os = "redox"))] {
1474         extern {
1475             pub fn getsid(pid: pid_t) -> pid_t;
1476             #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
1477                        link_name = "pause$UNIX2003")]
1478             pub fn pause() -> ::c_int;
1479 
1480             pub fn mkdirat(dirfd: ::c_int, pathname: *const ::c_char,
1481                           mode: ::mode_t) -> ::c_int;
1482             pub fn openat(dirfd: ::c_int, pathname: *const ::c_char,
1483                           flags: ::c_int, ...) -> ::c_int;
1484 
1485             #[cfg_attr(all(target_os = "macos", target_arch = "x86_64"),
1486                        link_name = "fdopendir$INODE64")]
1487             #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
1488                        link_name = "fdopendir$INODE64$UNIX2003")]
1489             pub fn fdopendir(fd: ::c_int) -> *mut ::DIR;
1490 
1491             #[cfg_attr(all(target_os = "macos", not(target_arch = "aarch64")),
1492                        link_name = "readdir_r$INODE64")]
1493             #[cfg_attr(target_os = "netbsd", link_name = "__readdir_r30")]
1494             #[cfg_attr(
1495                 all(target_os = "freebsd", any(freebsd11, freebsd10)),
1496                 link_name = "readdir_r@FBSD_1.0"
1497             )]
1498             #[allow(non_autolinks)] // FIXME: `<>` breaks line length limit.
1499             /// The 64-bit libc on Solaris and illumos only has readdir_r. If a
1500             /// 32-bit Solaris or illumos target is ever created, it should use
1501             /// __posix_readdir_r. See libc(3LIB) on Solaris or illumos:
1502             /// https://illumos.org/man/3lib/libc
1503             /// https://docs.oracle.com/cd/E36784_01/html/E36873/libc-3lib.html
1504             /// https://www.unix.com/man-page/opensolaris/3LIB/libc/
1505             pub fn readdir_r(dirp: *mut ::DIR, entry: *mut ::dirent,
1506                              result: *mut *mut ::dirent) -> ::c_int;
1507         }
1508     }
1509 }
1510 
1511 cfg_if! {
1512     if #[cfg(target_os = "nto")] {
1513         extern {
1514             pub fn readlinkat(dirfd: ::c_int,
1515                 pathname: *const ::c_char,
1516                 buf: *mut ::c_char,
1517                 bufsiz: ::size_t) -> ::c_int;
1518             pub fn readlink(path: *const c_char, buf: *mut c_char, bufsz: ::size_t) -> ::c_int;
1519             pub fn pselect(
1520                 nfds: ::c_int,
1521                 readfds: *mut fd_set,
1522                 writefds: *mut fd_set,
1523                 errorfds: *mut fd_set,
1524                 timeout: *mut timespec,
1525                 sigmask: *const sigset_t,
1526             ) -> ::c_int;
1527             pub fn sigaction(
1528                 signum: ::c_int,
1529                 act: *const sigaction,
1530                 oldact: *mut sigaction
1531             ) -> ::c_int;
1532         }
1533     } else {
1534         extern {
1535             pub fn readlinkat(dirfd: ::c_int,
1536                 pathname: *const ::c_char,
1537                 buf: *mut ::c_char,
1538                 bufsiz: ::size_t) -> ::ssize_t;
1539             pub fn fmemopen(buf: *mut c_void, size: size_t, mode: *const c_char) -> *mut FILE;
1540             pub fn open_memstream(ptr: *mut *mut c_char, sizeloc: *mut size_t) -> *mut FILE;
1541             pub fn atexit(cb: extern "C" fn()) -> c_int;
1542             #[cfg_attr(target_os = "netbsd", link_name = "__sigaction14")]
1543             pub fn sigaction(
1544                 signum: ::c_int,
1545                 act: *const sigaction,
1546                 oldact: *mut sigaction
1547             ) -> ::c_int;
1548             pub fn readlink(path: *const c_char, buf: *mut c_char, bufsz: ::size_t) -> ::ssize_t;
1549             #[cfg_attr(
1550                 all(target_os = "macos", target_arch = "x86_64"),
1551                 link_name = "pselect$1050"
1552             )]
1553             #[cfg_attr(
1554                 all(target_os = "macos", target_arch = "x86"),
1555                 link_name = "pselect$UNIX2003"
1556             )]
1557             #[cfg_attr(target_os = "netbsd", link_name = "__pselect50")]
1558             pub fn pselect(
1559                 nfds: ::c_int,
1560                 readfds: *mut fd_set,
1561                 writefds: *mut fd_set,
1562                 errorfds: *mut fd_set,
1563                 timeout: *const timespec,
1564                 sigmask: *const sigset_t,
1565             ) -> ::c_int;
1566         }
1567     }
1568 }
1569 
1570 cfg_if! {
1571    if #[cfg(not(any(target_os = "solaris",
1572                     target_os = "illumos",
1573                     target_os = "nto",
1574                 )))] {
1575         extern {
1576             pub fn cfmakeraw(termios: *mut ::termios);
1577             pub fn cfsetspeed(termios: *mut ::termios,
1578                               speed: ::speed_t) -> ::c_int;
1579         }
1580    }
1581 }
1582 
1583 cfg_if! {
1584     if #[cfg(target_env = "newlib")] {
1585         mod newlib;
1586         pub use self::newlib::*;
1587     } else if #[cfg(any(target_os = "linux",
1588                         target_os = "l4re",
1589                         target_os = "android",
1590                         target_os = "emscripten"))] {
1591         mod linux_like;
1592         pub use self::linux_like::*;
1593     } else if #[cfg(any(target_os = "macos",
1594                         target_os = "ios",
1595                         target_os = "tvos",
1596                         target_os = "watchos",
1597                         target_os = "visionos",
1598                         target_os = "freebsd",
1599                         target_os = "dragonfly",
1600                         target_os = "openbsd",
1601                         target_os = "netbsd"))] {
1602         mod bsd;
1603         pub use self::bsd::*;
1604     } else if #[cfg(any(target_os = "solaris",
1605                         target_os = "illumos"))] {
1606         mod solarish;
1607         pub use self::solarish::*;
1608     } else if #[cfg(target_os = "haiku")] {
1609         mod haiku;
1610         pub use self::haiku::*;
1611     } else if #[cfg(target_os = "redox")] {
1612         mod redox;
1613         pub use self::redox::*;
1614     } else if #[cfg(target_os = "nto")] {
1615         mod nto;
1616         pub use self::nto::*;
1617     } else if #[cfg(target_os = "aix")] {
1618         mod aix;
1619         pub use self::aix::*;
1620     } else if #[cfg(target_os = "hurd")] {
1621         mod hurd;
1622         pub use self::hurd::*;
1623     } else if #[cfg(target_os = "nuttx")] {
1624         mod nuttx;
1625         pub use self::nuttx::*;
1626     } else {
1627         // Unknown target_os
1628     }
1629 }
1630 
1631 cfg_if! {
1632     if #[cfg(libc_core_cvoid)] {
1633         pub use ::ffi::c_void;
1634     } else {
1635         // Use repr(u8) as LLVM expects `void*` to be the same as `i8*` to help
1636         // enable more optimization opportunities around it recognizing things
1637         // like malloc/free.
1638         #[repr(u8)]
1639         #[allow(missing_copy_implementations)]
1640         #[allow(missing_debug_implementations)]
1641         pub enum c_void {
1642             // Two dummy variants so the #[repr] attribute can be used.
1643             #[doc(hidden)]
1644             __variant1,
1645             #[doc(hidden)]
1646             __variant2,
1647         }
1648     }
1649 }
1650 
1651 cfg_if! {
1652     if #[cfg(libc_align)] {
1653         mod align;
1654         pub use self::align::*;
1655     } else {
1656         mod no_align;
1657         pub use self::no_align::*;
1658     }
1659 }
1660