xref: /drstd/dlibc/src/unix/mod.rs (revision 9670759b785600bf6315e4173e46a602f16add7a)
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 int8_t = i8;
7 pub type int16_t = i16;
8 pub type int32_t = i32;
9 pub type int64_t = i64;
10 pub type uint8_t = u8;
11 pub type uint16_t = u16;
12 pub type uint32_t = u32;
13 pub type uint64_t = u64;
14 
15 pub type c_schar = i8;
16 pub type c_uchar = u8;
17 pub type c_short = i16;
18 pub type c_ushort = u16;
19 pub type c_int = i32;
20 pub type c_uint = u32;
21 pub type c_float = f32;
22 pub type c_double = f64;
23 pub type c_longlong = i64;
24 pub type c_ulonglong = u64;
25 pub type intmax_t = i64;
26 pub type uintmax_t = u64;
27 
28 pub type size_t = usize;
29 pub type ptrdiff_t = isize;
30 pub type intptr_t = isize;
31 pub type uintptr_t = usize;
32 pub type ssize_t = isize;
33 pub type wint_t = u32;
34 
35 pub type pid_t = i32;
36 pub type in_addr_t = u32;
37 pub type in_port_t = u16;
38 pub type sighandler_t = ::size_t;
39 pub type cc_t = ::c_uchar;
40 
41 cfg_if! {
42     if #[cfg(any(target_os = "espidf", target_os = "horizon", target_os = "vita"))] {
43         pub type uid_t = ::c_ushort;
44         pub type gid_t = ::c_ushort;
45     } else if #[cfg(target_os = "nto")] {
46         pub type uid_t = i32;
47         pub type gid_t = i32;
48     } else {
49         pub type uid_t = u32;
50         pub type gid_t = u32;
51     }
52 }
53 
54 #[cfg_attr(feature = "extra_traits", derive(Debug))]
55 pub enum DIR {}
56 impl ::Copy for DIR {}
57 impl ::Clone for DIR {
58     fn clone(&self) -> DIR {
59         *self
60     }
61 }
62 pub type locale_t = *mut ::c_void;
63 
64 #[cfg(target_os = "dragonos")]
65 #[derive(Default,Copy,Clone)]
66 pub struct timespec {
67     pub tv_sec: time_t,
68     #[cfg(all(target_arch = "x86_64", target_pointer_width = "32"))]
69     pub tv_nsec: i64,
70     #[cfg(not(all(target_arch = "x86_64", target_pointer_width = "32")))]
71     pub tv_nsec: ::c_long,
72 }
73 
74 // linux x32 compatibility
75 // See https://sourceware.org/bugzilla/show_bug.cgi?id=16437
76 #[cfg(not(target_os = "dragonos"))]
77 #[derive(Copy,Clone)]
78 pub struct timespec {
79     pub tv_sec: time_t,
80     #[cfg(all(target_arch = "x86_64", target_pointer_width = "32"))]
81     pub tv_nsec: i64,
82     #[cfg(not(all(target_arch = "x86_64", target_pointer_width = "32")))]
83     pub tv_nsec: ::c_long,
84 }
85 
86 s! {
87     pub struct group {
88         pub gr_name: *mut ::c_char,
89         pub gr_passwd: *mut ::c_char,
90         pub gr_gid: ::gid_t,
91         pub gr_mem: *mut *mut ::c_char,
92     }
93 
94     pub struct utimbuf {
95         pub actime: time_t,
96         pub modtime: time_t,
97     }
98 
99     pub struct rlimit {
100         pub rlim_cur: rlim_t,
101         pub rlim_max: rlim_t,
102     }
103 
104     pub struct rusage {
105         pub ru_utime: timeval,
106         pub ru_stime: timeval,
107         pub ru_maxrss: c_long,
108         #[cfg(all(target_arch = "x86_64", target_pointer_width = "32"))]
109         __pad1: u32,
110         pub ru_ixrss: c_long,
111         #[cfg(all(target_arch = "x86_64", target_pointer_width = "32"))]
112         __pad2: u32,
113         pub ru_idrss: c_long,
114         #[cfg(all(target_arch = "x86_64", target_pointer_width = "32"))]
115         __pad3: u32,
116         pub ru_isrss: c_long,
117         #[cfg(all(target_arch = "x86_64", target_pointer_width = "32"))]
118         __pad4: u32,
119         pub ru_minflt: c_long,
120         #[cfg(all(target_arch = "x86_64", target_pointer_width = "32"))]
121         __pad5: u32,
122         pub ru_majflt: c_long,
123         #[cfg(all(target_arch = "x86_64", target_pointer_width = "32"))]
124         __pad6: u32,
125         pub ru_nswap: c_long,
126         #[cfg(all(target_arch = "x86_64", target_pointer_width = "32"))]
127         __pad7: u32,
128         pub ru_inblock: c_long,
129         #[cfg(all(target_arch = "x86_64", target_pointer_width = "32"))]
130         __pad8: u32,
131         pub ru_oublock: c_long,
132         #[cfg(all(target_arch = "x86_64", target_pointer_width = "32"))]
133         __pad9: u32,
134         pub ru_msgsnd: c_long,
135         #[cfg(all(target_arch = "x86_64", target_pointer_width = "32"))]
136         __pad10: u32,
137         pub ru_msgrcv: c_long,
138         #[cfg(all(target_arch = "x86_64", target_pointer_width = "32"))]
139         __pad11: u32,
140         pub ru_nsignals: c_long,
141         #[cfg(all(target_arch = "x86_64", target_pointer_width = "32"))]
142         __pad12: u32,
143         pub ru_nvcsw: c_long,
144         #[cfg(all(target_arch = "x86_64", target_pointer_width = "32"))]
145         __pad13: u32,
146         pub ru_nivcsw: c_long,
147         #[cfg(all(target_arch = "x86_64", target_pointer_width = "32"))]
148         __pad14: u32,
149 
150         #[cfg(any(target_env = "musl", target_env = "ohos", target_os = "emscripten"))]
151         __reserved: [c_long; 16],
152     }
153 
154     pub struct ipv6_mreq {
155         pub ipv6mr_multiaddr: in6_addr,
156         #[cfg(target_os = "android")]
157         pub ipv6mr_interface: ::c_int,
158         #[cfg(not(target_os = "android"))]
159         pub ipv6mr_interface: ::c_uint,
160     }
161 
162     pub struct hostent {
163         pub h_name: *mut ::c_char,
164         pub h_aliases: *mut *mut ::c_char,
165         pub h_addrtype: ::c_int,
166         pub h_length: ::c_int,
167         pub h_addr_list: *mut *mut ::c_char,
168     }
169 
170     pub struct iovec {
171         pub iov_base: *mut ::c_void,
172         pub iov_len: ::size_t,
173     }
174 
175     pub struct pollfd {
176         pub fd: ::c_int,
177         pub events: ::c_short,
178         pub revents: ::c_short,
179     }
180 
181     pub struct winsize {
182         pub ws_row: ::c_ushort,
183         pub ws_col: ::c_ushort,
184         pub ws_xpixel: ::c_ushort,
185         pub ws_ypixel: ::c_ushort,
186     }
187 
188     pub struct linger {
189         pub l_onoff: ::c_int,
190         pub l_linger: ::c_int,
191     }
192 
193     pub struct sigval {
194         // Actually a union of an int and a void*
195         pub sival_ptr: *mut ::c_void
196     }
197 
198     // <sys/times.h>
199     pub struct tms {
200         pub tms_utime: ::clock_t,
201         pub tms_stime: ::clock_t,
202         pub tms_cutime: ::clock_t,
203         pub tms_cstime: ::clock_t,
204     }
205 
206     pub struct servent {
207         pub s_name: *mut ::c_char,
208         pub s_aliases: *mut *mut ::c_char,
209         pub s_port: ::c_int,
210         pub s_proto: *mut ::c_char,
211     }
212 
213     pub struct protoent {
214         pub p_name: *mut ::c_char,
215         pub p_aliases: *mut *mut ::c_char,
216         pub p_proto: ::c_int,
217     }
218 }
219 
220 pub const INT_MIN: c_int = -2147483648;
221 pub const INT_MAX: c_int = 2147483647;
222 
223 pub const SIG_DFL: sighandler_t = 0 as sighandler_t;
224 pub const SIG_IGN: sighandler_t = 1 as sighandler_t;
225 pub const SIG_ERR: sighandler_t = !0 as sighandler_t;
226 cfg_if! {
227     if #[cfg(not(target_os = "nto"))] {
228         pub const DT_UNKNOWN: u8 = 0;
229         pub const DT_FIFO: u8 = 1;
230         pub const DT_CHR: u8 = 2;
231         pub const DT_DIR: u8 = 4;
232         pub const DT_BLK: u8 = 6;
233         pub const DT_REG: u8 = 8;
234         pub const DT_LNK: u8 = 10;
235         pub const DT_SOCK: u8 = 12;
236     }
237 }
238 cfg_if! {
239     if #[cfg(not(target_os = "redox"))] {
240         pub const FD_CLOEXEC: ::c_int = 0x1;
241     }
242 }
243 
244 cfg_if! {
245     if #[cfg(not(target_os = "nto"))]
246     {
247         pub const USRQUOTA: ::c_int = 0;
248         pub const GRPQUOTA: ::c_int = 1;
249     }
250 }
251 pub const SIGIOT: ::c_int = 6;
252 
253 pub const S_ISUID: ::mode_t = 0x800;
254 pub const S_ISGID: ::mode_t = 0x400;
255 pub const S_ISVTX: ::mode_t = 0x200;
256 
257 cfg_if! {
258     if #[cfg(not(any(target_os = "haiku", target_os = "illumos",
259                      target_os = "solaris")))] {
260         pub const IF_NAMESIZE: ::size_t = 16;
261         pub const IFNAMSIZ: ::size_t = IF_NAMESIZE;
262     }
263 }
264 
265 pub const LOG_EMERG: ::c_int = 0;
266 pub const LOG_ALERT: ::c_int = 1;
267 pub const LOG_CRIT: ::c_int = 2;
268 pub const LOG_ERR: ::c_int = 3;
269 pub const LOG_WARNING: ::c_int = 4;
270 pub const LOG_NOTICE: ::c_int = 5;
271 pub const LOG_INFO: ::c_int = 6;
272 pub const LOG_DEBUG: ::c_int = 7;
273 
274 pub const LOG_KERN: ::c_int = 0;
275 pub const LOG_USER: ::c_int = 1 << 3;
276 pub const LOG_MAIL: ::c_int = 2 << 3;
277 pub const LOG_DAEMON: ::c_int = 3 << 3;
278 pub const LOG_AUTH: ::c_int = 4 << 3;
279 pub const LOG_SYSLOG: ::c_int = 5 << 3;
280 pub const LOG_LPR: ::c_int = 6 << 3;
281 pub const LOG_NEWS: ::c_int = 7 << 3;
282 pub const LOG_UUCP: ::c_int = 8 << 3;
283 pub const LOG_LOCAL0: ::c_int = 16 << 3;
284 pub const LOG_LOCAL1: ::c_int = 17 << 3;
285 pub const LOG_LOCAL2: ::c_int = 18 << 3;
286 pub const LOG_LOCAL3: ::c_int = 19 << 3;
287 pub const LOG_LOCAL4: ::c_int = 20 << 3;
288 pub const LOG_LOCAL5: ::c_int = 21 << 3;
289 pub const LOG_LOCAL6: ::c_int = 22 << 3;
290 pub const LOG_LOCAL7: ::c_int = 23 << 3;
291 
292 cfg_if! {
293     if #[cfg(not(target_os = "haiku"))] {
294         pub const LOG_PID: ::c_int = 0x01;
295         pub const LOG_CONS: ::c_int = 0x02;
296         pub const LOG_ODELAY: ::c_int = 0x04;
297         pub const LOG_NDELAY: ::c_int = 0x08;
298         pub const LOG_NOWAIT: ::c_int = 0x10;
299     }
300 }
301 pub const LOG_PRIMASK: ::c_int = 7;
302 pub const LOG_FACMASK: ::c_int = 0x3f8;
303 
304 cfg_if! {
305     if #[cfg(not(target_os = "nto"))]
306     {
307         pub const PRIO_MIN: ::c_int = -20;
308         pub const PRIO_MAX: ::c_int = 20;
309     }
310 }
311 pub const IPPROTO_ICMP: ::c_int = 1;
312 pub const IPPROTO_ICMPV6: ::c_int = 58;
313 pub const IPPROTO_TCP: ::c_int = 6;
314 pub const IPPROTO_UDP: ::c_int = 17;
315 pub const IPPROTO_IP: ::c_int = 0;
316 pub const IPPROTO_IPV6: ::c_int = 41;
317 
318 pub const INADDR_LOOPBACK: in_addr_t = 2130706433;
319 pub const INADDR_ANY: in_addr_t = 0;
320 pub const INADDR_BROADCAST: in_addr_t = 4294967295;
321 pub const INADDR_NONE: in_addr_t = 4294967295;
322 
323 pub const ARPOP_REQUEST: u16 = 1;
324 pub const ARPOP_REPLY: u16 = 2;
325 
326 pub const ATF_COM: ::c_int = 0x02;
327 pub const ATF_PERM: ::c_int = 0x04;
328 pub const ATF_PUBL: ::c_int = 0x08;
329 pub const ATF_USETRAILERS: ::c_int = 0x10;
330 
331 cfg_if! {
332     if #[cfg(any(target_os = "l4re", target_os = "espidf"))] {
333         // required libraries for L4Re and the ESP-IDF framework are linked externally, ATM
334     } else if #[cfg(feature = "std")] {
335         // cargo build, don't pull in anything extra as the libstd dep
336         // already pulls in all libs.
337     } else if #[cfg(all(target_os = "linux",
338                         any(target_env = "gnu", target_env = "uclibc"),
339                         feature = "rustc-dep-of-std"))] {
340         #[link(name = "util", kind = "static", modifiers = "-bundle",
341             cfg(target_feature = "crt-static"))]
342         #[link(name = "rt", kind = "static", modifiers = "-bundle",
343             cfg(target_feature = "crt-static"))]
344         #[link(name = "pthread", kind = "static", modifiers = "-bundle",
345             cfg(target_feature = "crt-static"))]
346         #[link(name = "m", kind = "static", modifiers = "-bundle",
347             cfg(target_feature = "crt-static"))]
348         #[link(name = "dl", kind = "static", modifiers = "-bundle",
349             cfg(target_feature = "crt-static"))]
350         #[link(name = "c", kind = "static", modifiers = "-bundle",
351             cfg(target_feature = "crt-static"))]
352         #[link(name = "gcc_eh", kind = "static", modifiers = "-bundle",
353             cfg(target_feature = "crt-static"))]
354         #[link(name = "gcc", kind = "static", modifiers = "-bundle",
355             cfg(target_feature = "crt-static"))]
356         #[link(name = "c", kind = "static", modifiers = "-bundle",
357             cfg(target_feature = "crt-static"))]
358         #[link(name = "util", cfg(not(target_feature = "crt-static")))]
359         #[link(name = "rt", cfg(not(target_feature = "crt-static")))]
360         #[link(name = "pthread", cfg(not(target_feature = "crt-static")))]
361         #[link(name = "m", cfg(not(target_feature = "crt-static")))]
362         #[link(name = "dl", cfg(not(target_feature = "crt-static")))]
363         #[link(name = "c", cfg(not(target_feature = "crt-static")))]
364         extern {}
365     } else if #[cfg(any(target_env = "musl", target_env = "ohos"))] {
366         #[cfg_attr(feature = "rustc-dep-of-std",
367                    link(name = "c", kind = "static", modifiers = "-bundle",
368                         cfg(target_feature = "crt-static")))]
369         #[cfg_attr(feature = "rustc-dep-of-std",
370                    link(name = "c", cfg(not(target_feature = "crt-static"))))]
371         extern {}
372     } else if #[cfg(target_os = "emscripten")] {
373         #[link(name = "c")]
374         extern {}
375     } else if #[cfg(all(target_os = "android", feature = "rustc-dep-of-std"))] {
376         #[link(name = "c", kind = "static", modifiers = "-bundle",
377             cfg(target_feature = "crt-static"))]
378         #[link(name = "m", kind = "static", modifiers = "-bundle",
379             cfg(target_feature = "crt-static"))]
380         #[link(name = "m", cfg(not(target_feature = "crt-static")))]
381         #[link(name = "c", cfg(not(target_feature = "crt-static")))]
382         extern {}
383     } else if #[cfg(any(target_os = "macos",
384                         target_os = "ios",
385                         target_os = "tvos",
386                         target_os = "watchos",
387                         target_os = "android",
388                         target_os = "openbsd",
389                         target_os = "nto",
390                     ))] {
391         #[link(name = "c")]
392         #[link(name = "m")]
393         extern {}
394     } else if #[cfg(target_os = "haiku")] {
395         #[link(name = "root")]
396         #[link(name = "network")]
397         extern {}
398     } else if #[cfg(target_env = "newlib")] {
399         #[link(name = "c")]
400         #[link(name = "m")]
401         extern {}
402     } else if #[cfg(target_os = "hermit")] {
403         // no_default_libraries is set to false for HermitCore, so only a link
404         // to "pthread" needs to be added.
405         #[link(name = "pthread")]
406         extern {}
407     } else if #[cfg(target_env = "illumos")] {
408         #[link(name = "c")]
409         #[link(name = "m")]
410         extern {}
411     } else if #[cfg(target_os = "redox")] {
412         #[cfg_attr(feature = "rustc-dep-of-std",
413                    link(name = "c", kind = "static", modifiers = "-bundle",
414                         cfg(target_feature = "crt-static")))]
415         #[cfg_attr(feature = "rustc-dep-of-std",
416                    link(name = "c", cfg(not(target_feature = "crt-static"))))]
417         extern {}
418     } else if #[cfg(target_env = "aix")] {
419         #[link(name = "c")]
420         #[link(name = "m")]
421         #[link(name = "bsd")]
422         #[link(name = "pthread")]
423         extern {}
424     } else {
425         #[link(name = "c")]
426         #[link(name = "m")]
427         #[link(name = "rt")]
428         #[link(name = "pthread")]
429         extern {}
430     }
431 }
432 
433 #[cfg_attr(feature = "extra_traits", derive(Debug))]
434 pub enum FILE {}
435 impl ::Copy for FILE {}
436 impl ::Clone for FILE {
437     fn clone(&self) -> FILE {
438         *self
439     }
440 }
441 #[cfg_attr(feature = "extra_traits", derive(Debug))]
442 pub enum fpos_t {} // FIXME: fill this out with a struct
443 impl ::Copy for fpos_t {}
444 impl ::Clone for fpos_t {
445     fn clone(&self) -> fpos_t {
446         *self
447     }
448 }
449 
450 extern "C" {
451     pub fn isalnum(c: c_int) -> c_int;
452     pub fn isalpha(c: c_int) -> c_int;
453     pub fn iscntrl(c: c_int) -> c_int;
454     pub fn isdigit(c: c_int) -> c_int;
455     pub fn isgraph(c: c_int) -> c_int;
456     pub fn islower(c: c_int) -> c_int;
457     pub fn isprint(c: c_int) -> c_int;
458     pub fn ispunct(c: c_int) -> c_int;
459     pub fn isspace(c: c_int) -> c_int;
460     pub fn isupper(c: c_int) -> c_int;
461     pub fn isxdigit(c: c_int) -> c_int;
462     pub fn isblank(c: c_int) -> c_int;
463     pub fn tolower(c: c_int) -> c_int;
464     pub fn toupper(c: c_int) -> c_int;
465     pub fn qsort(
466         base: *mut c_void,
467         num: size_t,
468         size: size_t,
469         compar: ::Option<unsafe extern "C" fn(*const c_void, *const c_void) -> c_int>,
470     );
471     pub fn bsearch(
472         key: *const c_void,
473         base: *const c_void,
474         num: size_t,
475         size: size_t,
476         compar: ::Option<unsafe extern "C" fn(*const c_void, *const c_void) -> c_int>,
477     ) -> *mut c_void;
478     #[cfg_attr(
479         all(target_os = "macos", target_arch = "x86"),
480         link_name = "fopen$UNIX2003"
481     )]
482     pub fn fopen(filename: *const c_char, mode: *const c_char) -> *mut FILE;
483     #[cfg_attr(
484         all(target_os = "macos", target_arch = "x86"),
485         link_name = "freopen$UNIX2003"
486     )]
487     pub fn freopen(filename: *const c_char, mode: *const c_char, file: *mut FILE) -> *mut FILE;
488 
489     pub fn fflush(file: *mut FILE) -> c_int;
490     pub fn fclose(file: *mut FILE) -> c_int;
491     pub fn remove(filename: *const c_char) -> c_int;
492     pub fn rename(oldname: *const c_char, newname: *const c_char) -> c_int;
493     pub fn tmpfile() -> *mut FILE;
494     pub fn setvbuf(stream: *mut FILE, buffer: *mut c_char, mode: c_int, size: size_t) -> c_int;
495     pub fn setbuf(stream: *mut FILE, buf: *mut c_char);
496     pub fn getchar() -> c_int;
497     pub fn putchar(c: c_int) -> c_int;
498     pub fn fgetc(stream: *mut FILE) -> c_int;
499     pub fn fgets(buf: *mut c_char, n: c_int, stream: *mut FILE) -> *mut c_char;
500     pub fn fputc(c: c_int, stream: *mut FILE) -> c_int;
501     #[cfg_attr(
502         all(target_os = "macos", target_arch = "x86"),
503         link_name = "fputs$UNIX2003"
504     )]
505     pub fn fputs(s: *const c_char, stream: *mut FILE) -> c_int;
506     pub fn puts(s: *const c_char) -> c_int;
507     pub fn ungetc(c: c_int, stream: *mut FILE) -> c_int;
508     pub fn fread(ptr: *mut c_void, size: size_t, nobj: size_t, stream: *mut FILE) -> size_t;
509     #[cfg_attr(
510         all(target_os = "macos", target_arch = "x86"),
511         link_name = "fwrite$UNIX2003"
512     )]
513     pub fn fwrite(ptr: *const c_void, size: size_t, nobj: size_t, stream: *mut FILE) -> size_t;
514     pub fn fseek(stream: *mut FILE, offset: c_long, whence: c_int) -> c_int;
515     pub fn ftell(stream: *mut FILE) -> c_long;
516     pub fn rewind(stream: *mut FILE);
517     #[cfg_attr(target_os = "netbsd", link_name = "__fgetpos50")]
518     pub fn fgetpos(stream: *mut FILE, ptr: *mut fpos_t) -> c_int;
519     #[cfg_attr(target_os = "netbsd", link_name = "__fsetpos50")]
520     pub fn fsetpos(stream: *mut FILE, ptr: *const fpos_t) -> c_int;
521     pub fn feof(stream: *mut FILE) -> c_int;
522     pub fn ferror(stream: *mut FILE) -> c_int;
523     pub fn clearerr(stream: *mut FILE);
524     pub fn perror(s: *const c_char);
525     pub fn atof(s: *const c_char) -> c_double;
526     pub fn atoi(s: *const c_char) -> c_int;
527     pub fn atol(s: *const c_char) -> c_long;
528     pub fn atoll(s: *const c_char) -> c_longlong;
529     #[cfg_attr(
530         all(target_os = "macos", target_arch = "x86"),
531         link_name = "strtod$UNIX2003"
532     )]
533     pub fn strtod(s: *const c_char, endp: *mut *mut c_char) -> c_double;
534     pub fn strtof(s: *const c_char, endp: *mut *mut c_char) -> c_float;
535     pub fn strtol(s: *const c_char, endp: *mut *mut c_char, base: c_int) -> c_long;
536     pub fn strtoll(s: *const c_char, endp: *mut *mut c_char, base: c_int) -> c_longlong;
537     pub fn strtoul(s: *const c_char, endp: *mut *mut c_char, base: c_int) -> c_ulong;
538     pub fn strtoull(s: *const c_char, endp: *mut *mut c_char, base: c_int) -> c_ulonglong;
539     pub fn calloc(nobj: size_t, size: size_t) -> *mut c_void;
540     pub fn malloc(size: size_t) -> *mut c_void;
541     pub fn realloc(p: *mut c_void, size: size_t) -> *mut c_void;
542     pub fn free(p: *mut c_void);
543     pub fn abort() -> !;
544     pub fn exit(status: c_int) -> !;
545     pub fn _exit(status: c_int) -> !;
546     #[cfg_attr(
547         all(target_os = "macos", target_arch = "x86"),
548         link_name = "system$UNIX2003"
549     )]
550     pub fn system(s: *const c_char) -> c_int;
551     pub fn getenv(s: *const c_char) -> *mut c_char;
552 
553     pub fn strcpy(dst: *mut c_char, src: *const c_char) -> *mut c_char;
554     pub fn strncpy(dst: *mut c_char, src: *const c_char, n: size_t) -> *mut c_char;
555     pub fn stpcpy(dst: *mut c_char, src: *const c_char) -> *mut c_char;
556     pub fn strcat(s: *mut c_char, ct: *const c_char) -> *mut c_char;
557     pub fn strncat(s: *mut c_char, ct: *const c_char, n: size_t) -> *mut c_char;
558     pub fn strcmp(cs: *const c_char, ct: *const c_char) -> c_int;
559     pub fn strncmp(cs: *const c_char, ct: *const c_char, n: size_t) -> c_int;
560     pub fn strcoll(cs: *const c_char, ct: *const c_char) -> c_int;
561     pub fn strchr(cs: *const c_char, c: c_int) -> *mut c_char;
562     pub fn strrchr(cs: *const c_char, c: c_int) -> *mut c_char;
563     pub fn strspn(cs: *const c_char, ct: *const c_char) -> size_t;
564     pub fn strcspn(cs: *const c_char, ct: *const c_char) -> size_t;
565     pub fn strdup(cs: *const c_char) -> *mut c_char;
566     pub fn strndup(cs: *const c_char, n: size_t) -> *mut c_char;
567     pub fn strpbrk(cs: *const c_char, ct: *const c_char) -> *mut c_char;
568     pub fn strstr(cs: *const c_char, ct: *const c_char) -> *mut c_char;
569     pub fn strcasecmp(s1: *const c_char, s2: *const c_char) -> c_int;
570     pub fn strncasecmp(s1: *const c_char, s2: *const c_char, n: size_t) -> c_int;
571     pub fn strlen(cs: *const c_char) -> size_t;
572     pub fn strnlen(cs: *const c_char, maxlen: size_t) -> size_t;
573     #[cfg_attr(
574         all(target_os = "macos", target_arch = "x86"),
575         link_name = "strerror$UNIX2003"
576     )]
577     pub fn strerror(n: c_int) -> *mut c_char;
578     pub fn strtok(s: *mut c_char, t: *const c_char) -> *mut c_char;
579     pub fn strtok_r(s: *mut c_char, t: *const c_char, p: *mut *mut c_char) -> *mut c_char;
580     pub fn strxfrm(s: *mut c_char, ct: *const c_char, n: size_t) -> size_t;
581     pub fn strsignal(sig: c_int) -> *mut c_char;
582     pub fn wcslen(buf: *const wchar_t) -> size_t;
583     pub fn wcstombs(dest: *mut c_char, src: *const wchar_t, n: size_t) -> ::size_t;
584 
585     pub fn memchr(cx: *const c_void, c: c_int, n: size_t) -> *mut c_void;
586     pub fn wmemchr(cx: *const wchar_t, c: wchar_t, n: size_t) -> *mut wchar_t;
587     pub fn memcmp(cx: *const c_void, ct: *const c_void, n: size_t) -> c_int;
588     pub fn memcpy(dest: *mut c_void, src: *const c_void, n: size_t) -> *mut c_void;
589     pub fn memmove(dest: *mut c_void, src: *const c_void, n: size_t) -> *mut c_void;
590     pub fn memset(dest: *mut c_void, c: c_int, n: size_t) -> *mut c_void;
591 }
592 
593 extern "C" {
594     #[cfg_attr(target_os = "netbsd", link_name = "__getpwnam50")]
595     pub fn getpwnam(name: *const ::c_char) -> *mut passwd;
596     #[cfg_attr(target_os = "netbsd", link_name = "__getpwuid50")]
597     pub fn getpwuid(uid: ::uid_t) -> *mut passwd;
598 
599     pub fn fprintf(stream: *mut ::FILE, format: *const ::c_char, ...) -> ::c_int;
600     pub fn printf(format: *const ::c_char, ...) -> ::c_int;
601     pub fn snprintf(s: *mut ::c_char, n: ::size_t, format: *const ::c_char, ...) -> ::c_int;
602     pub fn sprintf(s: *mut ::c_char, format: *const ::c_char, ...) -> ::c_int;
603     #[cfg_attr(
604         all(target_os = "linux", not(target_env = "uclibc")),
605         link_name = "__isoc99_fscanf"
606     )]
607     pub fn fscanf(stream: *mut ::FILE, format: *const ::c_char, ...) -> ::c_int;
608     #[cfg_attr(
609         all(target_os = "linux", not(target_env = "uclibc")),
610         link_name = "__isoc99_scanf"
611     )]
612     pub fn scanf(format: *const ::c_char, ...) -> ::c_int;
613     #[cfg_attr(
614         all(target_os = "linux", not(target_env = "uclibc")),
615         link_name = "__isoc99_sscanf"
616     )]
617     pub fn sscanf(s: *const ::c_char, format: *const ::c_char, ...) -> ::c_int;
618     pub fn getchar_unlocked() -> ::c_int;
619     pub fn putchar_unlocked(c: ::c_int) -> ::c_int;
620 
621     #[cfg(not(all(
622         libc_cfg_target_vendor,
623         target_arch = "powerpc",
624         target_vendor = "nintendo"
625     )))]
626     #[cfg_attr(target_os = "netbsd", link_name = "__socket30")]
627     #[cfg_attr(target_os = "illumos", link_name = "__xnet_socket")]
628     #[cfg_attr(target_os = "espidf", link_name = "lwip_socket")]
629     pub fn socket(domain: ::c_int, ty: ::c_int, protocol: ::c_int) -> ::c_int;
630     #[cfg(not(all(
631         libc_cfg_target_vendor,
632         target_arch = "powerpc",
633         target_vendor = "nintendo"
634     )))]
635     #[cfg_attr(
636         all(target_os = "macos", target_arch = "x86"),
637         link_name = "connect$UNIX2003"
638     )]
639     #[cfg_attr(target_os = "illumos", link_name = "__xnet_connect")]
640     #[cfg_attr(target_os = "espidf", link_name = "lwip_connect")]
641     pub fn connect(socket: ::c_int, address: *const sockaddr, len: socklen_t) -> ::c_int;
642     #[cfg_attr(
643         all(target_os = "macos", target_arch = "x86"),
644         link_name = "listen$UNIX2003"
645     )]
646     #[cfg_attr(target_os = "espidf", link_name = "lwip_listen")]
647     pub fn listen(socket: ::c_int, backlog: ::c_int) -> ::c_int;
648     #[cfg(not(all(
649         libc_cfg_target_vendor,
650         target_arch = "powerpc",
651         target_vendor = "nintendo"
652     )))]
653     #[cfg_attr(
654         all(target_os = "macos", target_arch = "x86"),
655         link_name = "accept$UNIX2003"
656     )]
657     #[cfg_attr(target_os = "espidf", link_name = "lwip_accept")]
658     pub fn accept(socket: ::c_int, address: *mut sockaddr, address_len: *mut socklen_t) -> ::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 = "getpeername$UNIX2003"
667     )]
668     #[cfg_attr(target_os = "espidf", link_name = "lwip_getpeername")]
669     pub fn getpeername(
670         socket: ::c_int,
671         address: *mut sockaddr,
672         address_len: *mut socklen_t,
673     ) -> ::c_int;
674     #[cfg(not(all(
675         libc_cfg_target_vendor,
676         target_arch = "powerpc",
677         target_vendor = "nintendo"
678     )))]
679     #[cfg_attr(
680         all(target_os = "macos", target_arch = "x86"),
681         link_name = "getsockname$UNIX2003"
682     )]
683     #[cfg_attr(target_os = "espidf", link_name = "lwip_getsockname")]
684     pub fn getsockname(
685         socket: ::c_int,
686         address: *mut sockaddr,
687         address_len: *mut socklen_t,
688     ) -> ::c_int;
689     #[cfg_attr(target_os = "espidf", link_name = "lwip_setsockopt")]
690     pub fn setsockopt(
691         socket: ::c_int,
692         level: ::c_int,
693         name: ::c_int,
694         value: *const ::c_void,
695         option_len: socklen_t,
696     ) -> ::c_int;
697     #[cfg_attr(
698         all(target_os = "macos", target_arch = "x86"),
699         link_name = "socketpair$UNIX2003"
700     )]
701     #[cfg_attr(target_os = "illumos", link_name = "__xnet_socketpair")]
702     pub fn socketpair(
703         domain: ::c_int,
704         type_: ::c_int,
705         protocol: ::c_int,
706         socket_vector: *mut ::c_int,
707     ) -> ::c_int;
708     #[cfg(not(all(
709         libc_cfg_target_vendor,
710         target_arch = "powerpc",
711         target_vendor = "nintendo"
712     )))]
713     #[cfg_attr(
714         all(target_os = "macos", target_arch = "x86"),
715         link_name = "sendto$UNIX2003"
716     )]
717     #[cfg_attr(target_os = "illumos", link_name = "__xnet_sendto")]
718     #[cfg_attr(target_os = "espidf", link_name = "lwip_sendto")]
719     pub fn sendto(
720         socket: ::c_int,
721         buf: *const ::c_void,
722         len: ::size_t,
723         flags: ::c_int,
724         addr: *const sockaddr,
725         addrlen: socklen_t,
726     ) -> ::ssize_t;
727     #[cfg_attr(target_os = "espidf", link_name = "lwip_shutdown")]
728     pub fn shutdown(socket: ::c_int, how: ::c_int) -> ::c_int;
729 
730     #[cfg_attr(
731         all(target_os = "macos", target_arch = "x86"),
732         link_name = "chmod$UNIX2003"
733     )]
734     pub fn chmod(path: *const c_char, mode: mode_t) -> ::c_int;
735     #[cfg_attr(
736         all(target_os = "macos", target_arch = "x86"),
737         link_name = "fchmod$UNIX2003"
738     )]
739     pub fn fchmod(fd: ::c_int, mode: mode_t) -> ::c_int;
740 
741     #[cfg_attr(
742         all(target_os = "macos", not(target_arch = "aarch64")),
743         link_name = "fstat$INODE64"
744     )]
745     #[cfg_attr(target_os = "netbsd", link_name = "__fstat50")]
746     #[cfg_attr(
747         all(target_os = "freebsd", any(freebsd11, freebsd10)),
748         link_name = "fstat@FBSD_1.0"
749     )]
750     pub fn fstat(fildes: ::c_int, buf: *mut stat) -> ::c_int;
751 
752     pub fn mkdir(path: *const c_char, mode: mode_t) -> ::c_int;
753 
754     #[cfg_attr(
755         all(target_os = "macos", not(target_arch = "aarch64")),
756         link_name = "stat$INODE64"
757     )]
758     #[cfg_attr(target_os = "netbsd", link_name = "__stat50")]
759     #[cfg_attr(
760         all(target_os = "freebsd", any(freebsd11, freebsd10)),
761         link_name = "stat@FBSD_1.0"
762     )]
763     pub fn stat(path: *const c_char, buf: *mut stat) -> ::c_int;
764 
765     pub fn pclose(stream: *mut ::FILE) -> ::c_int;
766     #[cfg_attr(
767         all(target_os = "macos", target_arch = "x86"),
768         link_name = "fdopen$UNIX2003"
769     )]
770     pub fn fdopen(fd: ::c_int, mode: *const c_char) -> *mut ::FILE;
771     pub fn fileno(stream: *mut ::FILE) -> ::c_int;
772 
773     #[cfg_attr(
774         all(target_os = "macos", target_arch = "x86"),
775         link_name = "open$UNIX2003"
776     )]
777     pub fn open(path: *const c_char, oflag: ::c_int, ...) -> ::c_int;
778     #[cfg_attr(
779         all(target_os = "macos", target_arch = "x86"),
780         link_name = "creat$UNIX2003"
781     )]
782     pub fn creat(path: *const c_char, mode: mode_t) -> ::c_int;
783     #[cfg_attr(
784         all(target_os = "macos", target_arch = "x86"),
785         link_name = "fcntl$UNIX2003"
786     )]
787     pub fn fcntl(fd: ::c_int, cmd: ::c_int, ...) -> ::c_int;
788 
789     #[cfg_attr(
790         all(target_os = "macos", target_arch = "x86_64"),
791         link_name = "opendir$INODE64"
792     )]
793     #[cfg_attr(
794         all(target_os = "macos", target_arch = "x86"),
795         link_name = "opendir$INODE64$UNIX2003"
796     )]
797     #[cfg_attr(target_os = "netbsd", link_name = "__opendir30")]
798     pub fn opendir(dirname: *const c_char) -> *mut ::DIR;
799 
800     #[cfg_attr(
801         all(target_os = "macos", not(target_arch = "aarch64")),
802         link_name = "readdir$INODE64"
803     )]
804     #[cfg_attr(target_os = "netbsd", link_name = "__readdir30")]
805     #[cfg_attr(
806         all(target_os = "freebsd", any(freebsd11, freebsd10)),
807         link_name = "readdir@FBSD_1.0"
808     )]
809     pub fn readdir(dirp: *mut ::DIR) -> *mut ::dirent;
810     #[cfg_attr(
811         all(target_os = "macos", target_arch = "x86"),
812         link_name = "closedir$UNIX2003"
813     )]
814     pub fn closedir(dirp: *mut ::DIR) -> ::c_int;
815     #[cfg_attr(
816         all(target_os = "macos", target_arch = "x86_64"),
817         link_name = "rewinddir$INODE64"
818     )]
819     #[cfg_attr(
820         all(target_os = "macos", target_arch = "x86"),
821         link_name = "rewinddir$INODE64$UNIX2003"
822     )]
823     pub fn rewinddir(dirp: *mut ::DIR);
824 
825     pub fn fchmodat(
826         dirfd: ::c_int,
827         pathname: *const ::c_char,
828         mode: ::mode_t,
829         flags: ::c_int,
830     ) -> ::c_int;
831     pub fn fchown(fd: ::c_int, owner: ::uid_t, group: ::gid_t) -> ::c_int;
832     pub fn fchownat(
833         dirfd: ::c_int,
834         pathname: *const ::c_char,
835         owner: ::uid_t,
836         group: ::gid_t,
837         flags: ::c_int,
838     ) -> ::c_int;
839     #[cfg_attr(
840         all(target_os = "macos", not(target_arch = "aarch64")),
841         link_name = "fstatat$INODE64"
842     )]
843     #[cfg_attr(
844         all(target_os = "freebsd", any(freebsd11, freebsd10)),
845         link_name = "fstatat@FBSD_1.1"
846     )]
847     pub fn fstatat(
848         dirfd: ::c_int,
849         pathname: *const ::c_char,
850         buf: *mut stat,
851         flags: ::c_int,
852     ) -> ::c_int;
853     pub fn linkat(
854         olddirfd: ::c_int,
855         oldpath: *const ::c_char,
856         newdirfd: ::c_int,
857         newpath: *const ::c_char,
858         flags: ::c_int,
859     ) -> ::c_int;
860     pub fn renameat(
861         olddirfd: ::c_int,
862         oldpath: *const ::c_char,
863         newdirfd: ::c_int,
864         newpath: *const ::c_char,
865     ) -> ::c_int;
866     pub fn symlinkat(
867         target: *const ::c_char,
868         newdirfd: ::c_int,
869         linkpath: *const ::c_char,
870     ) -> ::c_int;
871     pub fn unlinkat(dirfd: ::c_int, pathname: *const ::c_char, flags: ::c_int) -> ::c_int;
872 
873     pub fn access(path: *const c_char, amode: ::c_int) -> ::c_int;
874     pub fn alarm(seconds: ::c_uint) -> ::c_uint;
875     pub fn chdir(dir: *const c_char) -> ::c_int;
876     pub fn fchdir(dirfd: ::c_int) -> ::c_int;
877     pub fn chown(path: *const c_char, uid: uid_t, gid: gid_t) -> ::c_int;
878     #[cfg_attr(
879         all(target_os = "macos", target_arch = "x86"),
880         link_name = "lchown$UNIX2003"
881     )]
882     pub fn lchown(path: *const c_char, uid: uid_t, gid: gid_t) -> ::c_int;
883     #[cfg_attr(
884         all(target_os = "macos", target_arch = "x86"),
885         link_name = "close$NOCANCEL$UNIX2003"
886     )]
887     #[cfg_attr(
888         all(target_os = "macos", target_arch = "x86_64"),
889         link_name = "close$NOCANCEL"
890     )]
891     pub fn close(fd: ::c_int) -> ::c_int;
892     pub fn dup(fd: ::c_int) -> ::c_int;
893     pub fn dup2(src: ::c_int, dst: ::c_int) -> ::c_int;
894     pub fn execl(path: *const c_char, arg0: *const c_char, ...) -> ::c_int;
895     pub fn execle(path: *const ::c_char, arg0: *const ::c_char, ...) -> ::c_int;
896     pub fn execlp(file: *const ::c_char, arg0: *const ::c_char, ...) -> ::c_int;
897     pub fn execv(prog: *const c_char, argv: *const *const c_char) -> ::c_int;
898     pub fn execve(
899         prog: *const c_char,
900         argv: *const *const c_char,
901         envp: *const *const c_char,
902     ) -> ::c_int;
903     pub fn execvp(c: *const c_char, argv: *const *const c_char) -> ::c_int;
904     pub fn fork() -> pid_t;
905     pub fn fpathconf(filedes: ::c_int, name: ::c_int) -> c_long;
906     pub fn getcwd(buf: *mut c_char, size: ::size_t) -> *mut c_char;
907     pub fn getegid() -> gid_t;
908     pub fn geteuid() -> uid_t;
909     pub fn getgid() -> gid_t;
910     pub fn getgroups(ngroups_max: ::c_int, groups: *mut gid_t) -> ::c_int;
911     #[cfg_attr(target_os = "illumos", link_name = "getloginx")]
912     pub fn getlogin() -> *mut c_char;
913     #[cfg_attr(
914         all(target_os = "macos", target_arch = "x86"),
915         link_name = "getopt$UNIX2003"
916     )]
917     pub fn getopt(argc: ::c_int, argv: *const *mut c_char, optstr: *const c_char) -> ::c_int;
918     pub fn getpgid(pid: pid_t) -> pid_t;
919     pub fn getpgrp() -> pid_t;
920     pub fn getpid() -> pid_t;
921     pub fn getppid() -> pid_t;
922     pub fn getuid() -> uid_t;
923     pub fn isatty(fd: ::c_int) -> ::c_int;
924     pub fn link(src: *const c_char, dst: *const c_char) -> ::c_int;
925     pub fn lseek(fd: ::c_int, offset: off_t, whence: ::c_int) -> off_t;
926     pub fn pathconf(path: *const c_char, name: ::c_int) -> c_long;
927     pub fn pipe(fds: *mut ::c_int) -> ::c_int;
928     pub fn posix_memalign(memptr: *mut *mut ::c_void, align: ::size_t, size: ::size_t) -> ::c_int;
929     #[cfg_attr(
930         all(target_os = "macos", target_arch = "x86"),
931         link_name = "read$UNIX2003"
932     )]
933     pub fn read(fd: ::c_int, buf: *mut ::c_void, count: ::size_t) -> ::ssize_t;
934     pub fn rmdir(path: *const c_char) -> ::c_int;
935     pub fn seteuid(uid: uid_t) -> ::c_int;
936     pub fn setegid(gid: gid_t) -> ::c_int;
937     pub fn setgid(gid: gid_t) -> ::c_int;
938     pub fn setpgid(pid: pid_t, pgid: pid_t) -> ::c_int;
939     pub fn setsid() -> pid_t;
940     pub fn setuid(uid: uid_t) -> ::c_int;
941     pub fn setreuid(ruid: uid_t, euid: uid_t) -> ::c_int;
942     pub fn setregid(rgid: gid_t, egid: gid_t) -> ::c_int;
943     #[cfg_attr(
944         all(target_os = "macos", target_arch = "x86"),
945         link_name = "sleep$UNIX2003"
946     )]
947     pub fn sleep(secs: ::c_uint) -> ::c_uint;
948     #[cfg_attr(
949         all(target_os = "macos", target_arch = "x86"),
950         link_name = "nanosleep$UNIX2003"
951     )]
952     #[cfg_attr(target_os = "netbsd", link_name = "__nanosleep50")]
953     pub fn nanosleep(rqtp: *const timespec, rmtp: *mut timespec) -> ::c_int;
954     pub fn tcgetpgrp(fd: ::c_int) -> pid_t;
955     pub fn tcsetpgrp(fd: ::c_int, pgrp: ::pid_t) -> ::c_int;
956     pub fn ttyname(fd: ::c_int) -> *mut c_char;
957     #[cfg_attr(
958         all(target_os = "macos", target_arch = "x86"),
959         link_name = "ttyname_r$UNIX2003"
960     )]
961     #[cfg_attr(target_os = "illumos", link_name = "__posix_ttyname_r")]
962     pub fn ttyname_r(fd: ::c_int, buf: *mut c_char, buflen: ::size_t) -> ::c_int;
963     pub fn unlink(c: *const c_char) -> ::c_int;
964     #[cfg_attr(
965         all(target_os = "macos", target_arch = "x86"),
966         link_name = "wait$UNIX2003"
967     )]
968     pub fn wait(status: *mut ::c_int) -> pid_t;
969     #[cfg_attr(
970         all(target_os = "macos", target_arch = "x86"),
971         link_name = "waitpid$UNIX2003"
972     )]
973     pub fn waitpid(pid: pid_t, status: *mut ::c_int, options: ::c_int) -> pid_t;
974     #[cfg_attr(
975         all(target_os = "macos", target_arch = "x86"),
976         link_name = "write$UNIX2003"
977     )]
978     pub fn write(fd: ::c_int, buf: *const ::c_void, count: ::size_t) -> ::ssize_t;
979     #[cfg_attr(
980         all(target_os = "macos", target_arch = "x86"),
981         link_name = "pread$UNIX2003"
982     )]
983     pub fn pread(fd: ::c_int, buf: *mut ::c_void, count: ::size_t, offset: off_t) -> ::ssize_t;
984     #[cfg_attr(
985         all(target_os = "macos", target_arch = "x86"),
986         link_name = "pwrite$UNIX2003"
987     )]
988     pub fn pwrite(fd: ::c_int, buf: *const ::c_void, count: ::size_t, offset: off_t) -> ::ssize_t;
989     pub fn umask(mask: mode_t) -> mode_t;
990 
991     #[cfg_attr(target_os = "netbsd", link_name = "__utime50")]
992     pub fn utime(file: *const c_char, buf: *const utimbuf) -> ::c_int;
993 
994     #[cfg_attr(
995         all(target_os = "macos", target_arch = "x86"),
996         link_name = "kill$UNIX2003"
997     )]
998     pub fn kill(pid: pid_t, sig: ::c_int) -> ::c_int;
999     #[cfg_attr(
1000         all(target_os = "macos", target_arch = "x86"),
1001         link_name = "killpg$UNIX2003"
1002     )]
1003     pub fn killpg(pgrp: pid_t, sig: ::c_int) -> ::c_int;
1004 
1005     pub fn mlock(addr: *const ::c_void, len: ::size_t) -> ::c_int;
1006     pub fn munlock(addr: *const ::c_void, len: ::size_t) -> ::c_int;
1007     pub fn mlockall(flags: ::c_int) -> ::c_int;
1008     pub fn munlockall() -> ::c_int;
1009 
1010     #[cfg_attr(
1011         all(target_os = "macos", target_arch = "x86"),
1012         link_name = "mmap$UNIX2003"
1013     )]
1014     pub fn mmap(
1015         addr: *mut ::c_void,
1016         len: ::size_t,
1017         prot: ::c_int,
1018         flags: ::c_int,
1019         fd: ::c_int,
1020         offset: off_t,
1021     ) -> *mut ::c_void;
1022     #[cfg_attr(
1023         all(target_os = "macos", target_arch = "x86"),
1024         link_name = "munmap$UNIX2003"
1025     )]
1026     pub fn munmap(addr: *mut ::c_void, len: ::size_t) -> ::c_int;
1027 
1028     pub fn if_nametoindex(ifname: *const c_char) -> ::c_uint;
1029     pub fn if_indextoname(ifindex: ::c_uint, ifname: *mut ::c_char) -> *mut ::c_char;
1030 
1031     #[cfg_attr(
1032         all(target_os = "macos", not(target_arch = "aarch64")),
1033         link_name = "lstat$INODE64"
1034     )]
1035     #[cfg_attr(target_os = "netbsd", link_name = "__lstat50")]
1036     #[cfg_attr(
1037         all(target_os = "freebsd", any(freebsd11, freebsd10)),
1038         link_name = "lstat@FBSD_1.0"
1039     )]
1040     pub fn lstat(path: *const c_char, buf: *mut stat) -> ::c_int;
1041 
1042     #[cfg_attr(
1043         all(target_os = "macos", target_arch = "x86"),
1044         link_name = "fsync$UNIX2003"
1045     )]
1046     pub fn fsync(fd: ::c_int) -> ::c_int;
1047 
1048     #[cfg_attr(
1049         all(target_os = "macos", target_arch = "x86"),
1050         link_name = "setenv$UNIX2003"
1051     )]
1052     pub fn setenv(name: *const c_char, val: *const c_char, overwrite: ::c_int) -> ::c_int;
1053     #[cfg_attr(
1054         all(target_os = "macos", target_arch = "x86"),
1055         link_name = "unsetenv$UNIX2003"
1056     )]
1057     #[cfg_attr(target_os = "netbsd", link_name = "__unsetenv13")]
1058     pub fn unsetenv(name: *const c_char) -> ::c_int;
1059 
1060     pub fn symlink(path1: *const c_char, path2: *const c_char) -> ::c_int;
1061 
1062     pub fn truncate(path: *const c_char, length: off_t) -> ::c_int;
1063     pub fn ftruncate(fd: ::c_int, length: off_t) -> ::c_int;
1064 
1065     pub fn signal(signum: ::c_int, handler: sighandler_t) -> sighandler_t;
1066 
1067     #[cfg_attr(target_os = "netbsd", link_name = "__getrusage50")]
1068     pub fn getrusage(resource: ::c_int, usage: *mut rusage) -> ::c_int;
1069 
1070     #[cfg_attr(
1071         any(
1072             target_os = "macos",
1073             target_os = "ios",
1074             target_os = "tvos",
1075             target_os = "watchos"
1076         ),
1077         link_name = "realpath$DARWIN_EXTSN"
1078     )]
1079     pub fn realpath(pathname: *const ::c_char, resolved: *mut ::c_char) -> *mut ::c_char;
1080 
1081     pub fn flock(fd: ::c_int, operation: ::c_int) -> ::c_int;
1082 
1083     #[cfg_attr(target_os = "netbsd", link_name = "__times13")]
1084     pub fn times(buf: *mut ::tms) -> ::clock_t;
1085 
1086     pub fn pthread_self() -> ::pthread_t;
1087     #[cfg_attr(
1088         all(target_os = "macos", target_arch = "x86"),
1089         link_name = "pthread_join$UNIX2003"
1090     )]
1091     pub fn pthread_join(native: ::pthread_t, value: *mut *mut ::c_void) -> ::c_int;
1092     pub fn pthread_exit(value: *mut ::c_void) -> !;
1093     pub fn pthread_attr_init(attr: *mut ::pthread_attr_t) -> ::c_int;
1094     pub fn pthread_attr_destroy(attr: *mut ::pthread_attr_t) -> ::c_int;
1095     pub fn pthread_attr_setstacksize(attr: *mut ::pthread_attr_t, stack_size: ::size_t) -> ::c_int;
1096     pub fn pthread_attr_setdetachstate(attr: *mut ::pthread_attr_t, state: ::c_int) -> ::c_int;
1097     pub fn pthread_detach(thread: ::pthread_t) -> ::c_int;
1098     #[cfg_attr(target_os = "netbsd", link_name = "__libc_thr_yield")]
1099     pub fn sched_yield() -> ::c_int;
1100     pub fn pthread_key_create(
1101         key: *mut pthread_key_t,
1102         dtor: ::Option<unsafe extern "C" fn(*mut ::c_void)>,
1103     ) -> ::c_int;
1104     pub fn pthread_key_delete(key: pthread_key_t) -> ::c_int;
1105     pub fn pthread_getspecific(key: pthread_key_t) -> *mut ::c_void;
1106     pub fn pthread_setspecific(key: pthread_key_t, value: *const ::c_void) -> ::c_int;
1107     pub fn pthread_mutex_init(
1108         lock: *mut pthread_mutex_t,
1109         attr: *const pthread_mutexattr_t,
1110     ) -> ::c_int;
1111     pub fn pthread_mutex_destroy(lock: *mut pthread_mutex_t) -> ::c_int;
1112     pub fn pthread_mutex_lock(lock: *mut pthread_mutex_t) -> ::c_int;
1113     pub fn pthread_mutex_trylock(lock: *mut pthread_mutex_t) -> ::c_int;
1114     pub fn pthread_mutex_unlock(lock: *mut pthread_mutex_t) -> ::c_int;
1115 
1116     pub fn pthread_mutexattr_init(attr: *mut pthread_mutexattr_t) -> ::c_int;
1117     #[cfg_attr(
1118         all(target_os = "macos", target_arch = "x86"),
1119         link_name = "pthread_mutexattr_destroy$UNIX2003"
1120     )]
1121     pub fn pthread_mutexattr_destroy(attr: *mut pthread_mutexattr_t) -> ::c_int;
1122     pub fn pthread_mutexattr_settype(attr: *mut pthread_mutexattr_t, _type: ::c_int) -> ::c_int;
1123 
1124     #[cfg_attr(
1125         all(target_os = "macos", target_arch = "x86"),
1126         link_name = "pthread_cond_init$UNIX2003"
1127     )]
1128     pub fn pthread_cond_init(cond: *mut pthread_cond_t, attr: *const pthread_condattr_t)
1129         -> ::c_int;
1130     #[cfg_attr(
1131         all(target_os = "macos", target_arch = "x86"),
1132         link_name = "pthread_cond_wait$UNIX2003"
1133     )]
1134     pub fn pthread_cond_wait(cond: *mut pthread_cond_t, lock: *mut pthread_mutex_t) -> ::c_int;
1135     #[cfg_attr(
1136         all(target_os = "macos", target_arch = "x86"),
1137         link_name = "pthread_cond_timedwait$UNIX2003"
1138     )]
1139     pub fn pthread_cond_timedwait(
1140         cond: *mut pthread_cond_t,
1141         lock: *mut pthread_mutex_t,
1142         abstime: *const ::timespec,
1143     ) -> ::c_int;
1144     pub fn pthread_cond_signal(cond: *mut pthread_cond_t) -> ::c_int;
1145     pub fn pthread_cond_broadcast(cond: *mut pthread_cond_t) -> ::c_int;
1146     pub fn pthread_cond_destroy(cond: *mut pthread_cond_t) -> ::c_int;
1147     pub fn pthread_condattr_init(attr: *mut pthread_condattr_t) -> ::c_int;
1148     pub fn pthread_condattr_destroy(attr: *mut pthread_condattr_t) -> ::c_int;
1149     #[cfg_attr(
1150         all(target_os = "macos", target_arch = "x86"),
1151         link_name = "pthread_rwlock_init$UNIX2003"
1152     )]
1153     pub fn pthread_rwlock_init(
1154         lock: *mut pthread_rwlock_t,
1155         attr: *const pthread_rwlockattr_t,
1156     ) -> ::c_int;
1157     #[cfg_attr(
1158         all(target_os = "macos", target_arch = "x86"),
1159         link_name = "pthread_rwlock_destroy$UNIX2003"
1160     )]
1161     pub fn pthread_rwlock_destroy(lock: *mut pthread_rwlock_t) -> ::c_int;
1162     #[cfg_attr(
1163         all(target_os = "macos", target_arch = "x86"),
1164         link_name = "pthread_rwlock_rdlock$UNIX2003"
1165     )]
1166     pub fn pthread_rwlock_rdlock(lock: *mut pthread_rwlock_t) -> ::c_int;
1167     #[cfg_attr(
1168         all(target_os = "macos", target_arch = "x86"),
1169         link_name = "pthread_rwlock_tryrdlock$UNIX2003"
1170     )]
1171     pub fn pthread_rwlock_tryrdlock(lock: *mut pthread_rwlock_t) -> ::c_int;
1172     #[cfg_attr(
1173         all(target_os = "macos", target_arch = "x86"),
1174         link_name = "pthread_rwlock_wrlock$UNIX2003"
1175     )]
1176     pub fn pthread_rwlock_wrlock(lock: *mut pthread_rwlock_t) -> ::c_int;
1177     #[cfg_attr(
1178         all(target_os = "macos", target_arch = "x86"),
1179         link_name = "pthread_rwlock_trywrlock$UNIX2003"
1180     )]
1181     pub fn pthread_rwlock_trywrlock(lock: *mut pthread_rwlock_t) -> ::c_int;
1182     #[cfg_attr(
1183         all(target_os = "macos", target_arch = "x86"),
1184         link_name = "pthread_rwlock_unlock$UNIX2003"
1185     )]
1186     pub fn pthread_rwlock_unlock(lock: *mut pthread_rwlock_t) -> ::c_int;
1187     pub fn pthread_rwlockattr_init(attr: *mut pthread_rwlockattr_t) -> ::c_int;
1188     pub fn pthread_rwlockattr_destroy(attr: *mut pthread_rwlockattr_t) -> ::c_int;
1189 
1190     #[cfg_attr(target_os = "illumos", link_name = "__xnet_getsockopt")]
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(target_os = "illumos", link_name = "__xnet_getaddrinfo")]
1214     #[cfg_attr(target_os = "espidf", link_name = "lwip_getaddrinfo")]
1215     pub fn getaddrinfo(
1216         node: *const c_char,
1217         service: *const c_char,
1218         hints: *const addrinfo,
1219         res: *mut *mut addrinfo,
1220     ) -> ::c_int;
1221     #[cfg(not(all(
1222         libc_cfg_target_vendor,
1223         target_arch = "powerpc",
1224         target_vendor = "nintendo"
1225     )))]
1226     #[cfg_attr(target_os = "espidf", link_name = "lwip_freeaddrinfo")]
1227     pub fn freeaddrinfo(res: *mut addrinfo);
1228     pub fn hstrerror(errcode: ::c_int) -> *const ::c_char;
1229     pub fn gai_strerror(errcode: ::c_int) -> *const ::c_char;
1230     #[cfg_attr(
1231         any(
1232             all(
1233                 target_os = "linux",
1234                 not(any(target_env = "musl", target_env = "ohos"))
1235             ),
1236             target_os = "freebsd",
1237             target_os = "dragonfly",
1238             target_os = "haiku"
1239         ),
1240         link_name = "__res_init"
1241     )]
1242     #[cfg_attr(
1243         any(
1244             target_os = "macos",
1245             target_os = "ios",
1246             target_os = "tvos",
1247             target_os = "watchos"
1248         ),
1249         link_name = "res_9_init"
1250     )]
1251     pub fn res_init() -> ::c_int;
1252 
1253     #[cfg_attr(target_os = "netbsd", link_name = "__gmtime_r50")]
1254     #[cfg_attr(any(target_env = "musl", target_env = "ohos"), allow(deprecated))]
1255     // FIXME: for `time_t`
1256     pub fn gmtime_r(time_p: *const time_t, result: *mut tm) -> *mut tm;
1257     #[cfg_attr(target_os = "netbsd", link_name = "__localtime_r50")]
1258     #[cfg_attr(any(target_env = "musl", target_env = "ohos"), allow(deprecated))]
1259     // FIXME: for `time_t`
1260     pub fn localtime_r(time_p: *const time_t, result: *mut tm) -> *mut tm;
1261     #[cfg_attr(
1262         all(target_os = "macos", target_arch = "x86"),
1263         link_name = "mktime$UNIX2003"
1264     )]
1265     #[cfg_attr(target_os = "netbsd", link_name = "__mktime50")]
1266     #[cfg_attr(any(target_env = "musl", target_env = "ohos"), allow(deprecated))]
1267     // FIXME: for `time_t`
1268     pub fn mktime(tm: *mut tm) -> time_t;
1269     #[cfg_attr(target_os = "netbsd", link_name = "__time50")]
1270     #[cfg_attr(any(target_env = "musl", target_env = "ohos"), allow(deprecated))]
1271     // FIXME: for `time_t`
1272     pub fn time(time: *mut time_t) -> time_t;
1273     #[cfg_attr(target_os = "netbsd", link_name = "__gmtime50")]
1274     #[cfg_attr(any(target_env = "musl", target_env = "ohos"), allow(deprecated))]
1275     // FIXME: for `time_t`
1276     pub fn gmtime(time_p: *const time_t) -> *mut tm;
1277     #[cfg_attr(target_os = "netbsd", link_name = "__locatime50")]
1278     #[cfg_attr(any(target_env = "musl", target_env = "ohos"), allow(deprecated))]
1279     // FIXME: for `time_t`
1280     pub fn localtime(time_p: *const time_t) -> *mut tm;
1281     #[cfg_attr(target_os = "netbsd", link_name = "__difftime50")]
1282     #[cfg_attr(any(target_env = "musl", target_env = "ohos"), allow(deprecated))]
1283     // FIXME: for `time_t`
1284     pub fn difftime(time1: time_t, time0: time_t) -> ::c_double;
1285     #[cfg_attr(target_os = "netbsd", link_name = "__timegm50")]
1286     #[cfg_attr(any(target_env = "musl", target_env = "ohos"), allow(deprecated))]
1287     // FIXME: for `time_t`
1288     pub fn timegm(tm: *mut ::tm) -> time_t;
1289 
1290     #[cfg_attr(target_os = "netbsd", link_name = "__mknod50")]
1291     #[cfg_attr(
1292         all(target_os = "freebsd", any(freebsd11, freebsd10)),
1293         link_name = "mknod@FBSD_1.0"
1294     )]
1295     pub fn mknod(pathname: *const ::c_char, mode: ::mode_t, dev: ::dev_t) -> ::c_int;
1296     pub fn gethostname(name: *mut ::c_char, len: ::size_t) -> ::c_int;
1297     pub fn endservent();
1298     pub fn getservbyname(name: *const ::c_char, proto: *const ::c_char) -> *mut servent;
1299     pub fn getservbyport(port: ::c_int, proto: *const ::c_char) -> *mut servent;
1300     pub fn getservent() -> *mut servent;
1301     pub fn setservent(stayopen: ::c_int);
1302     pub fn getprotobyname(name: *const ::c_char) -> *mut protoent;
1303     pub fn getprotobynumber(proto: ::c_int) -> *mut protoent;
1304     pub fn chroot(name: *const ::c_char) -> ::c_int;
1305     #[cfg_attr(
1306         all(target_os = "macos", target_arch = "x86"),
1307         link_name = "usleep$UNIX2003"
1308     )]
1309     pub fn usleep(secs: ::c_uint) -> ::c_int;
1310     #[cfg_attr(
1311         all(target_os = "macos", target_arch = "x86"),
1312         link_name = "send$UNIX2003"
1313     )]
1314     #[cfg_attr(target_os = "espidf", link_name = "lwip_send")]
1315     pub fn send(socket: ::c_int, buf: *const ::c_void, len: ::size_t, flags: ::c_int) -> ::ssize_t;
1316     #[cfg_attr(
1317         all(target_os = "macos", target_arch = "x86"),
1318         link_name = "recv$UNIX2003"
1319     )]
1320     #[cfg_attr(target_os = "espidf", link_name = "lwip_recv")]
1321     pub fn recv(socket: ::c_int, buf: *mut ::c_void, len: ::size_t, flags: ::c_int) -> ::ssize_t;
1322     #[cfg_attr(
1323         all(target_os = "macos", target_arch = "x86"),
1324         link_name = "putenv$UNIX2003"
1325     )]
1326     #[cfg_attr(target_os = "netbsd", link_name = "__putenv50")]
1327     pub fn putenv(string: *mut c_char) -> ::c_int;
1328     #[cfg_attr(
1329         all(target_os = "macos", target_arch = "x86"),
1330         link_name = "poll$UNIX2003"
1331     )]
1332     pub fn poll(fds: *mut pollfd, nfds: nfds_t, timeout: ::c_int) -> ::c_int;
1333     #[cfg_attr(
1334         all(target_os = "macos", target_arch = "x86_64"),
1335         link_name = "select$1050"
1336     )]
1337     #[cfg_attr(
1338         all(target_os = "macos", target_arch = "x86"),
1339         link_name = "select$UNIX2003"
1340     )]
1341     #[cfg_attr(target_os = "netbsd", link_name = "__select50")]
1342     pub fn select(
1343         nfds: ::c_int,
1344         readfds: *mut fd_set,
1345         writefds: *mut fd_set,
1346         errorfds: *mut fd_set,
1347         timeout: *mut timeval,
1348     ) -> ::c_int;
1349     #[cfg_attr(target_os = "netbsd", link_name = "__setlocale50")]
1350     pub fn setlocale(category: ::c_int, locale: *const ::c_char) -> *mut ::c_char;
1351     pub fn localeconv() -> *mut lconv;
1352 
1353     #[cfg_attr(
1354         all(target_os = "macos", target_arch = "x86"),
1355         link_name = "sem_wait$UNIX2003"
1356     )]
1357     pub fn sem_wait(sem: *mut sem_t) -> ::c_int;
1358     pub fn sem_trywait(sem: *mut sem_t) -> ::c_int;
1359     pub fn sem_post(sem: *mut sem_t) -> ::c_int;
1360     pub fn statvfs(path: *const c_char, buf: *mut statvfs) -> ::c_int;
1361     pub fn fstatvfs(fd: ::c_int, buf: *mut statvfs) -> ::c_int;
1362 
1363     #[cfg_attr(target_os = "netbsd", link_name = "__sigemptyset14")]
1364     pub fn sigemptyset(set: *mut sigset_t) -> ::c_int;
1365     #[cfg_attr(target_os = "netbsd", link_name = "__sigaddset14")]
1366     pub fn sigaddset(set: *mut sigset_t, signum: ::c_int) -> ::c_int;
1367     #[cfg_attr(target_os = "netbsd", link_name = "__sigfillset14")]
1368     pub fn sigfillset(set: *mut sigset_t) -> ::c_int;
1369     #[cfg_attr(target_os = "netbsd", link_name = "__sigdelset14")]
1370     pub fn sigdelset(set: *mut sigset_t, signum: ::c_int) -> ::c_int;
1371     #[cfg_attr(target_os = "netbsd", link_name = "__sigismember14")]
1372     pub fn sigismember(set: *const sigset_t, signum: ::c_int) -> ::c_int;
1373 
1374     #[cfg_attr(target_os = "netbsd", link_name = "__sigprocmask14")]
1375     pub fn sigprocmask(how: ::c_int, set: *const sigset_t, oldset: *mut sigset_t) -> ::c_int;
1376     #[cfg_attr(target_os = "netbsd", link_name = "__sigpending14")]
1377     pub fn sigpending(set: *mut sigset_t) -> ::c_int;
1378 
1379     pub fn sysconf(name: ::c_int) -> ::c_long;
1380 
1381     pub fn mkfifo(path: *const c_char, mode: mode_t) -> ::c_int;
1382 
1383     pub fn fseeko(stream: *mut ::FILE, offset: ::off_t, whence: ::c_int) -> ::c_int;
1384     pub fn ftello(stream: *mut ::FILE) -> ::off_t;
1385     #[cfg_attr(
1386         all(target_os = "macos", target_arch = "x86"),
1387         link_name = "tcdrain$UNIX2003"
1388     )]
1389     pub fn tcdrain(fd: ::c_int) -> ::c_int;
1390     pub fn cfgetispeed(termios: *const ::termios) -> ::speed_t;
1391     pub fn cfgetospeed(termios: *const ::termios) -> ::speed_t;
1392     pub fn cfsetispeed(termios: *mut ::termios, speed: ::speed_t) -> ::c_int;
1393     pub fn cfsetospeed(termios: *mut ::termios, speed: ::speed_t) -> ::c_int;
1394     pub fn tcgetattr(fd: ::c_int, termios: *mut ::termios) -> ::c_int;
1395     pub fn tcsetattr(fd: ::c_int, optional_actions: ::c_int, termios: *const ::termios) -> ::c_int;
1396     pub fn tcflow(fd: ::c_int, action: ::c_int) -> ::c_int;
1397     pub fn tcflush(fd: ::c_int, action: ::c_int) -> ::c_int;
1398     pub fn tcgetsid(fd: ::c_int) -> ::pid_t;
1399     pub fn tcsendbreak(fd: ::c_int, duration: ::c_int) -> ::c_int;
1400     pub fn mkstemp(template: *mut ::c_char) -> ::c_int;
1401     pub fn mkdtemp(template: *mut ::c_char) -> *mut ::c_char;
1402 
1403     pub fn tmpnam(ptr: *mut ::c_char) -> *mut ::c_char;
1404 
1405     pub fn openlog(ident: *const ::c_char, logopt: ::c_int, facility: ::c_int);
1406     pub fn closelog();
1407     pub fn setlogmask(maskpri: ::c_int) -> ::c_int;
1408     #[cfg_attr(target_os = "macos", link_name = "syslog$DARWIN_EXTSN")]
1409     pub fn syslog(priority: ::c_int, message: *const ::c_char, ...);
1410     #[cfg_attr(
1411         all(target_os = "macos", target_arch = "x86"),
1412         link_name = "nice$UNIX2003"
1413     )]
1414     pub fn nice(incr: ::c_int) -> ::c_int;
1415 
1416     pub fn grantpt(fd: ::c_int) -> ::c_int;
1417     pub fn posix_openpt(flags: ::c_int) -> ::c_int;
1418     pub fn ptsname(fd: ::c_int) -> *mut ::c_char;
1419     pub fn unlockpt(fd: ::c_int) -> ::c_int;
1420 
1421     pub fn strcasestr(cs: *const c_char, ct: *const c_char) -> *mut c_char;
1422     pub fn getline(lineptr: *mut *mut c_char, n: *mut size_t, stream: *mut FILE) -> ssize_t;
1423 
1424     pub fn lockf(fd: ::c_int, cmd: ::c_int, len: ::off_t) -> ::c_int;
1425 
1426 }
1427 cfg_if! {
1428     if #[cfg(not(any(target_os = "emscripten",
1429                      target_os = "android",
1430                      target_os = "haiku",
1431                      target_os = "nto")))] {
1432         extern "C" {
1433             pub fn adjtime(delta: *const timeval, olddelta: *mut timeval) -> ::c_int;
1434             pub fn stpncpy(dst: *mut c_char, src: *const c_char, n: size_t) -> *mut c_char;
1435         }
1436     }
1437 }
1438 
1439 cfg_if! {
1440     if #[cfg(not(target_os = "aix"))] {
1441         extern "C" {
1442             pub fn dladdr(addr: *const ::c_void, info: *mut Dl_info) -> ::c_int;
1443         }
1444     }
1445 }
1446 
1447 cfg_if! {
1448     if #[cfg(not(any(target_env = "uclibc", target_os = "nto")))] {
1449         extern "C" {
1450             pub fn open_wmemstream(
1451                 ptr: *mut *mut wchar_t,
1452                 sizeloc: *mut size_t,
1453             ) -> *mut FILE;
1454         }
1455     }
1456 }
1457 
1458 cfg_if! {
1459     if #[cfg(not(target_os = "redox"))] {
1460         extern {
1461             pub fn getsid(pid: pid_t) -> pid_t;
1462             #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
1463                        link_name = "pause$UNIX2003")]
1464             pub fn pause() -> ::c_int;
1465 
1466             pub fn mkdirat(dirfd: ::c_int, pathname: *const ::c_char,
1467                           mode: ::mode_t) -> ::c_int;
1468             pub fn openat(dirfd: ::c_int, pathname: *const ::c_char,
1469                           flags: ::c_int, ...) -> ::c_int;
1470 
1471             #[cfg_attr(all(target_os = "macos", target_arch = "x86_64"),
1472                        link_name = "fdopendir$INODE64")]
1473             #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
1474                        link_name = "fdopendir$INODE64$UNIX2003")]
1475             pub fn fdopendir(fd: ::c_int) -> *mut ::DIR;
1476 
1477             #[cfg_attr(all(target_os = "macos", not(target_arch = "aarch64")),
1478                        link_name = "readdir_r$INODE64")]
1479             #[cfg_attr(target_os = "netbsd", link_name = "__readdir_r30")]
1480             #[cfg_attr(
1481                 all(target_os = "freebsd", any(freebsd11, freebsd10)),
1482                 link_name = "readdir_r@FBSD_1.0"
1483             )]
1484             #[allow(non_autolinks)] // FIXME: `<>` breaks line length limit.
1485             /// The 64-bit libc on Solaris and illumos only has readdir_r. If a
1486             /// 32-bit Solaris or illumos target is ever created, it should use
1487             /// __posix_readdir_r. See libc(3LIB) on Solaris or illumos:
1488             /// https://illumos.org/man/3lib/libc
1489             /// https://docs.oracle.com/cd/E36784_01/html/E36873/libc-3lib.html
1490             /// https://www.unix.com/man-page/opensolaris/3LIB/libc/
1491             pub fn readdir_r(dirp: *mut ::DIR, entry: *mut ::dirent,
1492                              result: *mut *mut ::dirent) -> ::c_int;
1493         }
1494     }
1495 }
1496 
1497 cfg_if! {
1498     if #[cfg(target_os = "nto")] {
1499         extern {
1500             pub fn readlinkat(dirfd: ::c_int,
1501                 pathname: *const ::c_char,
1502                 buf: *mut ::c_char,
1503                 bufsiz: ::size_t) -> ::c_int;
1504             pub fn readlink(path: *const c_char, buf: *mut c_char, bufsz: ::size_t) -> ::c_int;
1505             pub fn pselect(
1506                 nfds: ::c_int,
1507                 readfds: *mut fd_set,
1508                 writefds: *mut fd_set,
1509                 errorfds: *mut fd_set,
1510                 timeout: *mut timespec,
1511                 sigmask: *const sigset_t,
1512             ) -> ::c_int;
1513             pub fn sigaction(
1514                 signum: ::c_int,
1515                 act: *const sigaction,
1516                 oldact: *mut sigaction
1517             ) -> ::c_int;
1518         }
1519     } else {
1520         extern {
1521             pub fn readlinkat(dirfd: ::c_int,
1522                 pathname: *const ::c_char,
1523                 buf: *mut ::c_char,
1524                 bufsiz: ::size_t) -> ::ssize_t;
1525             pub fn fmemopen(buf: *mut c_void, size: size_t, mode: *const c_char) -> *mut FILE;
1526             pub fn open_memstream(ptr: *mut *mut c_char, sizeloc: *mut size_t) -> *mut FILE;
1527             pub fn atexit(cb: extern "C" fn()) -> c_int;
1528             #[cfg_attr(target_os = "netbsd", link_name = "__sigaction14")]
1529             pub fn sigaction(
1530                 signum: ::c_int,
1531                 act: *const sigaction,
1532                 oldact: *mut sigaction
1533             ) -> ::c_int;
1534             pub fn readlink(path: *const c_char, buf: *mut c_char, bufsz: ::size_t) -> ::ssize_t;
1535             #[cfg_attr(
1536                 all(target_os = "macos", target_arch = "x86_64"),
1537                 link_name = "pselect$1050"
1538             )]
1539             #[cfg_attr(
1540                 all(target_os = "macos", target_arch = "x86"),
1541                 link_name = "pselect$UNIX2003"
1542             )]
1543             #[cfg_attr(target_os = "netbsd", link_name = "__pselect50")]
1544             pub fn pselect(
1545                 nfds: ::c_int,
1546                 readfds: *mut fd_set,
1547                 writefds: *mut fd_set,
1548                 errorfds: *mut fd_set,
1549                 timeout: *const timespec,
1550                 sigmask: *const sigset_t,
1551             ) -> ::c_int;
1552         }
1553     }
1554 }
1555 
1556 cfg_if! {
1557    if #[cfg(not(any(target_os = "solaris",
1558                     target_os = "illumos",
1559                     target_os = "nto",
1560                 )))] {
1561         extern {
1562             pub fn cfmakeraw(termios: *mut ::termios);
1563             pub fn cfsetspeed(termios: *mut ::termios,
1564                               speed: ::speed_t) -> ::c_int;
1565         }
1566    }
1567 }
1568 
1569 pub mod platform;
1570 pub use self::platform::*;
1571 
1572 // #[cfg(target_os = "dragonos")]
1573 // mod linux_like;
1574 // #[cfg(target_os = "dragonos")]
1575 // pub use self::linux_like::*;
1576 
1577 cfg_if! {
1578     if #[cfg(libc_core_cvoid)] {
1579         pub use ::ffi::c_void;
1580     } else {
1581         // Use repr(u8) as LLVM expects `void*` to be the same as `i8*` to help
1582         // enable more optimization opportunities around it recognizing things
1583         // like malloc/free.
1584         #[repr(u8)]
1585         #[allow(missing_copy_implementations)]
1586         #[allow(missing_debug_implementations)]
1587         pub enum c_void {
1588             // Two dummy variants so the #[repr] attribute can be used.
1589             #[doc(hidden)]
1590             __variant1,
1591             #[doc(hidden)]
1592             __variant2,
1593         }
1594     }
1595 }
1596 
1597 cfg_if! {
1598     if #[cfg(libc_align)] {
1599         mod align;
1600         pub use self::align::*;
1601     } else {
1602         mod no_align;
1603         pub use self::no_align::*;
1604     }
1605 }
1606 
1607 #[macro_use]
1608 pub mod macros;
1609 
1610 pub mod header;
1611 pub mod ld_so;
1612 pub mod start;
1613 pub mod fs;
1614 pub mod sync;
1615 pub mod c_str;
1616 pub mod c_vec;
1617 pub mod crt0;
1618 
1619 
1620 
1621 mod io;
1622 
1623 pub use header::*;
1624