xref: /rust-libc-0.2.174/src/windows/mod.rs (revision e04c86e3) 
1 //! Windows CRT definitions
2 
3 use crate::prelude::*;
4 
5 pub type c_schar = i8;
6 pub type c_uchar = u8;
7 pub type c_short = i16;
8 pub type c_ushort = u16;
9 pub type c_int = i32;
10 pub type c_uint = u32;
11 pub type c_float = f32;
12 pub type c_double = f64;
13 pub type c_longlong = i64;
14 pub type c_ulonglong = u64;
15 pub type intmax_t = i64;
16 pub type uintmax_t = u64;
17 
18 pub type size_t = usize;
19 pub type ptrdiff_t = isize;
20 pub type intptr_t = isize;
21 pub type uintptr_t = usize;
22 pub type ssize_t = isize;
23 pub type sighandler_t = usize;
24 
25 pub type c_long = i32;
26 pub type c_ulong = u32;
27 pub type wchar_t = u16;
28 
29 pub type clock_t = i32;
30 
31 pub type errno_t = c_int;
32 
33 cfg_if! {
34     if #[cfg(all(target_arch = "x86", target_env = "gnu"))] {
35         pub type time_t = i32;
36     } else {
37         pub type time_t = i64;
38     }
39 }
40 
41 pub type off_t = i32;
42 pub type dev_t = u32;
43 pub type ino_t = u16;
44 #[cfg_attr(feature = "extra_traits", derive(Debug))]
45 pub enum timezone {}
46 impl Copy for timezone {}
47 impl Clone for timezone {
48     fn clone(&self) -> timezone {
49         *self
50     }
51 }
52 pub type time64_t = i64;
53 
54 pub type SOCKET = crate::uintptr_t;
55 
56 s! {
57     // note this is the struct called stat64 in Windows. Not stat, nor stati64.
58     pub struct stat {
59         pub st_dev: dev_t,
60         pub st_ino: ino_t,
61         pub st_mode: u16,
62         pub st_nlink: c_short,
63         pub st_uid: c_short,
64         pub st_gid: c_short,
65         pub st_rdev: dev_t,
66         pub st_size: i64,
67         pub st_atime: time64_t,
68         pub st_mtime: time64_t,
69         pub st_ctime: time64_t,
70     }
71 
72     // note that this is called utimbuf64 in Windows
73     pub struct utimbuf {
74         pub actime: time64_t,
75         pub modtime: time64_t,
76     }
77 
78     pub struct tm {
79         pub tm_sec: c_int,
80         pub tm_min: c_int,
81         pub tm_hour: c_int,
82         pub tm_mday: c_int,
83         pub tm_mon: c_int,
84         pub tm_year: c_int,
85         pub tm_wday: c_int,
86         pub tm_yday: c_int,
87         pub tm_isdst: c_int,
88     }
89 
90     pub struct timeval {
91         pub tv_sec: c_long,
92         pub tv_usec: c_long,
93     }
94 
95     pub struct timespec {
96         pub tv_sec: time_t,
97         pub tv_nsec: c_long,
98     }
99 
100     pub struct sockaddr {
101         pub sa_family: c_ushort,
102         pub sa_data: [c_char; 14],
103     }
104 }
105 
106 pub const INT_MIN: c_int = -2147483648;
107 pub const INT_MAX: c_int = 2147483647;
108 
109 pub const EXIT_FAILURE: c_int = 1;
110 pub const EXIT_SUCCESS: c_int = 0;
111 pub const RAND_MAX: c_int = 32767;
112 pub const EOF: c_int = -1;
113 pub const SEEK_SET: c_int = 0;
114 pub const SEEK_CUR: c_int = 1;
115 pub const SEEK_END: c_int = 2;
116 pub const _IOFBF: c_int = 0;
117 pub const _IONBF: c_int = 4;
118 pub const _IOLBF: c_int = 64;
119 pub const BUFSIZ: c_uint = 512;
120 pub const FOPEN_MAX: c_uint = 20;
121 pub const FILENAME_MAX: c_uint = 260;
122 
123 // fcntl.h
124 pub const O_RDONLY: c_int = 0x0000;
125 pub const O_WRONLY: c_int = 0x0001;
126 pub const O_RDWR: c_int = 0x0002;
127 pub const O_APPEND: c_int = 0x0008;
128 pub const O_CREAT: c_int = 0x0100;
129 pub const O_TRUNC: c_int = 0x0200;
130 pub const O_EXCL: c_int = 0x0400;
131 pub const O_TEXT: c_int = 0x4000;
132 pub const O_BINARY: c_int = 0x8000;
133 pub const _O_WTEXT: c_int = 0x10000;
134 pub const _O_U16TEXT: c_int = 0x20000;
135 pub const _O_U8TEXT: c_int = 0x40000;
136 pub const O_RAW: c_int = O_BINARY;
137 pub const O_NOINHERIT: c_int = 0x0080;
138 pub const O_TEMPORARY: c_int = 0x0040;
139 pub const _O_SHORT_LIVED: c_int = 0x1000;
140 pub const _O_OBTAIN_DIR: c_int = 0x2000;
141 pub const O_SEQUENTIAL: c_int = 0x0020;
142 pub const O_RANDOM: c_int = 0x0010;
143 
144 pub const S_IFCHR: c_int = 0o2_0000;
145 pub const S_IFDIR: c_int = 0o4_0000;
146 pub const S_IFREG: c_int = 0o10_0000;
147 pub const S_IFMT: c_int = 0o17_0000;
148 pub const S_IEXEC: c_int = 0o0100;
149 pub const S_IWRITE: c_int = 0o0200;
150 pub const S_IREAD: c_int = 0o0400;
151 
152 pub const LC_ALL: c_int = 0;
153 pub const LC_COLLATE: c_int = 1;
154 pub const LC_CTYPE: c_int = 2;
155 pub const LC_MONETARY: c_int = 3;
156 pub const LC_NUMERIC: c_int = 4;
157 pub const LC_TIME: c_int = 5;
158 
159 pub const EPERM: c_int = 1;
160 pub const ENOENT: c_int = 2;
161 pub const ESRCH: c_int = 3;
162 pub const EINTR: c_int = 4;
163 pub const EIO: c_int = 5;
164 pub const ENXIO: c_int = 6;
165 pub const E2BIG: c_int = 7;
166 pub const ENOEXEC: c_int = 8;
167 pub const EBADF: c_int = 9;
168 pub const ECHILD: c_int = 10;
169 pub const EAGAIN: c_int = 11;
170 pub const ENOMEM: c_int = 12;
171 pub const EACCES: c_int = 13;
172 pub const EFAULT: c_int = 14;
173 pub const EBUSY: c_int = 16;
174 pub const EEXIST: c_int = 17;
175 pub const EXDEV: c_int = 18;
176 pub const ENODEV: c_int = 19;
177 pub const ENOTDIR: c_int = 20;
178 pub const EISDIR: c_int = 21;
179 pub const EINVAL: c_int = 22;
180 pub const ENFILE: c_int = 23;
181 pub const EMFILE: c_int = 24;
182 pub const ENOTTY: c_int = 25;
183 pub const EFBIG: c_int = 27;
184 pub const ENOSPC: c_int = 28;
185 pub const ESPIPE: c_int = 29;
186 pub const EROFS: c_int = 30;
187 pub const EMLINK: c_int = 31;
188 pub const EPIPE: c_int = 32;
189 pub const EDOM: c_int = 33;
190 pub const ERANGE: c_int = 34;
191 pub const EDEADLK: c_int = 36;
192 pub const EDEADLOCK: c_int = 36;
193 pub const ENAMETOOLONG: c_int = 38;
194 pub const ENOLCK: c_int = 39;
195 pub const ENOSYS: c_int = 40;
196 pub const ENOTEMPTY: c_int = 41;
197 pub const EILSEQ: c_int = 42;
198 pub const STRUNCATE: c_int = 80;
199 
200 // POSIX Supplement (from errno.h)
201 pub const EADDRINUSE: c_int = 100;
202 pub const EADDRNOTAVAIL: c_int = 101;
203 pub const EAFNOSUPPORT: c_int = 102;
204 pub const EALREADY: c_int = 103;
205 pub const EBADMSG: c_int = 104;
206 pub const ECANCELED: c_int = 105;
207 pub const ECONNABORTED: c_int = 106;
208 pub const ECONNREFUSED: c_int = 107;
209 pub const ECONNRESET: c_int = 108;
210 pub const EDESTADDRREQ: c_int = 109;
211 pub const EHOSTUNREACH: c_int = 110;
212 pub const EIDRM: c_int = 111;
213 pub const EINPROGRESS: c_int = 112;
214 pub const EISCONN: c_int = 113;
215 pub const ELOOP: c_int = 114;
216 pub const EMSGSIZE: c_int = 115;
217 pub const ENETDOWN: c_int = 116;
218 pub const ENETRESET: c_int = 117;
219 pub const ENETUNREACH: c_int = 118;
220 pub const ENOBUFS: c_int = 119;
221 pub const ENODATA: c_int = 120;
222 pub const ENOLINK: c_int = 121;
223 pub const ENOMSG: c_int = 122;
224 pub const ENOPROTOOPT: c_int = 123;
225 pub const ENOSR: c_int = 124;
226 pub const ENOSTR: c_int = 125;
227 pub const ENOTCONN: c_int = 126;
228 pub const ENOTRECOVERABLE: c_int = 127;
229 pub const ENOTSOCK: c_int = 128;
230 pub const ENOTSUP: c_int = 129;
231 pub const EOPNOTSUPP: c_int = 130;
232 pub const EOVERFLOW: c_int = 132;
233 pub const EOWNERDEAD: c_int = 133;
234 pub const EPROTO: c_int = 134;
235 pub const EPROTONOSUPPORT: c_int = 135;
236 pub const EPROTOTYPE: c_int = 136;
237 pub const ETIME: c_int = 137;
238 pub const ETIMEDOUT: c_int = 138;
239 pub const ETXTBSY: c_int = 139;
240 pub const EWOULDBLOCK: c_int = 140;
241 
242 // signal codes
243 pub const SIGINT: c_int = 2;
244 pub const SIGILL: c_int = 4;
245 pub const SIGFPE: c_int = 8;
246 pub const SIGSEGV: c_int = 11;
247 pub const SIGTERM: c_int = 15;
248 pub const SIGABRT: c_int = 22;
249 pub const NSIG: c_int = 23;
250 
251 pub const SIG_ERR: c_int = -1;
252 pub const SIG_DFL: crate::sighandler_t = 0;
253 pub const SIG_IGN: crate::sighandler_t = 1;
254 pub const SIG_GET: crate::sighandler_t = 2;
255 pub const SIG_SGE: crate::sighandler_t = 3;
256 pub const SIG_ACK: crate::sighandler_t = 4;
257 
258 // DIFF(main): removed in 458c58f409
259 // FIXME(msrv): done by `std` starting in 1.79.0
260 // inline comment below appeases style checker
261 #[cfg(all(target_env = "msvc", feature = "rustc-dep-of-std"))] // " if "
262 #[link(name = "msvcrt", cfg(not(target_feature = "crt-static")))]
263 #[link(name = "libcmt", cfg(target_feature = "crt-static"))]
264 extern "C" {}
265 
266 #[cfg_attr(feature = "extra_traits", derive(Debug))]
267 pub enum FILE {}
268 impl Copy for FILE {}
269 impl Clone for FILE {
270     fn clone(&self) -> FILE {
271         *self
272     }
273 }
274 #[cfg_attr(feature = "extra_traits", derive(Debug))]
275 pub enum fpos_t {} // FIXME(windows): fill this out with a struct
276 impl Copy for fpos_t {}
277 impl Clone for fpos_t {
278     fn clone(&self) -> fpos_t {
279         *self
280     }
281 }
282 
283 // Special handling for all print and scan type functions because of https://github.com/rust-lang/libc/issues/2860
284 cfg_if! {
285     if #[cfg(not(feature = "rustc-dep-of-std"))] {
286         #[cfg_attr(
287             all(windows, target_env = "msvc"),
288             link(name = "legacy_stdio_definitions")
289         )]
290         extern "C" {
291             pub fn printf(format: *const c_char, ...) -> c_int;
292             pub fn fprintf(stream: *mut FILE, format: *const c_char, ...) -> c_int;
293         }
294     }
295 }
296 
297 extern "C" {
298     pub fn isalnum(c: c_int) -> c_int;
299     pub fn isalpha(c: c_int) -> c_int;
300     pub fn iscntrl(c: c_int) -> c_int;
301     pub fn isdigit(c: c_int) -> c_int;
302     pub fn isgraph(c: c_int) -> c_int;
303     pub fn islower(c: c_int) -> c_int;
304     pub fn isprint(c: c_int) -> c_int;
305     pub fn ispunct(c: c_int) -> c_int;
306     pub fn isspace(c: c_int) -> c_int;
307     pub fn isupper(c: c_int) -> c_int;
308     pub fn isxdigit(c: c_int) -> c_int;
309     pub fn isblank(c: c_int) -> c_int;
310     pub fn tolower(c: c_int) -> c_int;
311     pub fn toupper(c: c_int) -> c_int;
312     pub fn fopen(filename: *const c_char, mode: *const c_char) -> *mut FILE;
313     pub fn freopen(filename: *const c_char, mode: *const c_char, file: *mut FILE) -> *mut FILE;
314     pub fn fflush(file: *mut FILE) -> c_int;
315     pub fn fclose(file: *mut FILE) -> c_int;
316     pub fn remove(filename: *const c_char) -> c_int;
317     pub fn rename(oldname: *const c_char, newname: *const c_char) -> c_int;
318     pub fn tmpfile() -> *mut FILE;
319     pub fn setvbuf(stream: *mut FILE, buffer: *mut c_char, mode: c_int, size: size_t) -> c_int;
320     pub fn setbuf(stream: *mut FILE, buf: *mut c_char);
321     pub fn getchar() -> c_int;
322     pub fn putchar(c: c_int) -> c_int;
323     pub fn fgetc(stream: *mut FILE) -> c_int;
324     pub fn fgets(buf: *mut c_char, n: c_int, stream: *mut FILE) -> *mut c_char;
325     pub fn fputc(c: c_int, stream: *mut FILE) -> c_int;
326     pub fn fputs(s: *const c_char, stream: *mut FILE) -> c_int;
327     pub fn puts(s: *const c_char) -> c_int;
328     pub fn ungetc(c: c_int, stream: *mut FILE) -> c_int;
329     pub fn fread(ptr: *mut c_void, size: size_t, nobj: size_t, stream: *mut FILE) -> size_t;
330     pub fn fwrite(ptr: *const c_void, size: size_t, nobj: size_t, stream: *mut FILE) -> size_t;
331     pub fn fseek(stream: *mut FILE, offset: c_long, whence: c_int) -> c_int;
332     pub fn ftell(stream: *mut FILE) -> c_long;
333     pub fn rewind(stream: *mut FILE);
334     pub fn fgetpos(stream: *mut FILE, ptr: *mut fpos_t) -> c_int;
335     pub fn fsetpos(stream: *mut FILE, ptr: *const fpos_t) -> c_int;
336     pub fn feof(stream: *mut FILE) -> c_int;
337     pub fn ferror(stream: *mut FILE) -> c_int;
338     pub fn perror(s: *const c_char);
339     pub fn atof(s: *const c_char) -> c_double;
340     pub fn atoi(s: *const c_char) -> c_int;
341     pub fn atol(s: *const c_char) -> c_long;
342     pub fn atoll(s: *const c_char) -> c_longlong;
343     pub fn strtod(s: *const c_char, endp: *mut *mut c_char) -> c_double;
344     pub fn strtof(s: *const c_char, endp: *mut *mut c_char) -> c_float;
345     pub fn strtol(s: *const c_char, endp: *mut *mut c_char, base: c_int) -> c_long;
346     pub fn strtoll(s: *const c_char, endp: *mut *mut c_char, base: c_int) -> c_longlong;
347     pub fn strtoul(s: *const c_char, endp: *mut *mut c_char, base: c_int) -> c_ulong;
348     pub fn strtoull(s: *const c_char, endp: *mut *mut c_char, base: c_int) -> c_ulonglong;
349     pub fn calloc(nobj: size_t, size: size_t) -> *mut c_void;
350     pub fn malloc(size: size_t) -> *mut c_void;
351     pub fn _msize(p: *mut c_void) -> size_t;
352     pub fn realloc(p: *mut c_void, size: size_t) -> *mut c_void;
353     pub fn free(p: *mut c_void);
354     pub fn abort() -> !;
355     pub fn exit(status: c_int) -> !;
356     pub fn _exit(status: c_int) -> !;
357     pub fn atexit(cb: extern "C" fn()) -> c_int;
358     pub fn system(s: *const c_char) -> c_int;
359     pub fn getenv(s: *const c_char) -> *mut c_char;
360 
361     pub fn strcpy(dst: *mut c_char, src: *const c_char) -> *mut c_char;
362     pub fn strncpy(dst: *mut c_char, src: *const c_char, n: size_t) -> *mut c_char;
363     pub fn strcat(s: *mut c_char, ct: *const c_char) -> *mut c_char;
364     pub fn strncat(s: *mut c_char, ct: *const c_char, n: size_t) -> *mut c_char;
365     pub fn strcmp(cs: *const c_char, ct: *const c_char) -> c_int;
366     pub fn strncmp(cs: *const c_char, ct: *const c_char, n: size_t) -> c_int;
367     pub fn strcoll(cs: *const c_char, ct: *const c_char) -> c_int;
368     pub fn strchr(cs: *const c_char, c: c_int) -> *mut c_char;
369     pub fn strrchr(cs: *const c_char, c: c_int) -> *mut c_char;
370     pub fn strspn(cs: *const c_char, ct: *const c_char) -> size_t;
371     pub fn strcspn(cs: *const c_char, ct: *const c_char) -> size_t;
372     pub fn strdup(cs: *const c_char) -> *mut c_char;
373     pub fn strpbrk(cs: *const c_char, ct: *const c_char) -> *mut c_char;
374     pub fn strstr(cs: *const c_char, ct: *const c_char) -> *mut c_char;
375     pub fn strlen(cs: *const c_char) -> size_t;
376     pub fn strnlen(cs: *const c_char, maxlen: size_t) -> size_t;
377     pub fn strerror(n: c_int) -> *mut c_char;
378     pub fn strtok(s: *mut c_char, t: *const c_char) -> *mut c_char;
379     pub fn strxfrm(s: *mut c_char, ct: *const c_char, n: size_t) -> size_t;
380     pub fn wcslen(buf: *const wchar_t) -> size_t;
381     pub fn wcstombs(dest: *mut c_char, src: *const wchar_t, n: size_t) -> size_t;
382 
383     pub fn memchr(cx: *const c_void, c: c_int, n: size_t) -> *mut c_void;
384     pub fn memcmp(cx: *const c_void, ct: *const c_void, n: size_t) -> c_int;
385     pub fn memcpy(dest: *mut c_void, src: *const c_void, n: size_t) -> *mut c_void;
386     pub fn memmove(dest: *mut c_void, src: *const c_void, n: size_t) -> *mut c_void;
387     pub fn memset(dest: *mut c_void, c: c_int, n: size_t) -> *mut c_void;
388 
389     pub fn abs(i: c_int) -> c_int;
390     pub fn labs(i: c_long) -> c_long;
391     pub fn rand() -> c_int;
392     pub fn srand(seed: c_uint);
393 
394     pub fn signal(signum: c_int, handler: sighandler_t) -> sighandler_t;
395     pub fn raise(signum: c_int) -> c_int;
396 
397     #[link_name = "_gmtime64_s"]
398     pub fn gmtime_s(destTime: *mut tm, srcTime: *const time_t) -> c_int;
399     #[link_name = "_localtime64_s"]
400     pub fn localtime_s(tmDest: *mut tm, sourceTime: *const time_t) -> crate::errno_t;
401     #[link_name = "_time64"]
402     pub fn time(destTime: *mut time_t) -> time_t;
403     #[link_name = "_chmod"]
404     pub fn chmod(path: *const c_char, mode: c_int) -> c_int;
405     #[link_name = "_wchmod"]
406     pub fn wchmod(path: *const wchar_t, mode: c_int) -> c_int;
407     #[link_name = "_mkdir"]
408     pub fn mkdir(path: *const c_char) -> c_int;
409     #[link_name = "_wrmdir"]
410     pub fn wrmdir(path: *const wchar_t) -> c_int;
411     #[link_name = "_fstat64"]
412     pub fn fstat(fildes: c_int, buf: *mut stat) -> c_int;
413     #[link_name = "_stat64"]
414     pub fn stat(path: *const c_char, buf: *mut stat) -> c_int;
415     #[link_name = "_wstat64"]
416     pub fn wstat(path: *const wchar_t, buf: *mut stat) -> c_int;
417     #[link_name = "_wutime64"]
418     pub fn wutime(file: *const wchar_t, buf: *mut utimbuf) -> c_int;
419     #[link_name = "_popen"]
420     pub fn popen(command: *const c_char, mode: *const c_char) -> *mut crate::FILE;
421     #[link_name = "_pclose"]
422     pub fn pclose(stream: *mut crate::FILE) -> c_int;
423     #[link_name = "_fdopen"]
424     pub fn fdopen(fd: c_int, mode: *const c_char) -> *mut crate::FILE;
425     #[link_name = "_fileno"]
426     pub fn fileno(stream: *mut crate::FILE) -> c_int;
427     #[link_name = "_open"]
428     pub fn open(path: *const c_char, oflag: c_int, ...) -> c_int;
429     #[link_name = "_wopen"]
430     pub fn wopen(path: *const wchar_t, oflag: c_int, ...) -> c_int;
431     #[link_name = "_creat"]
432     pub fn creat(path: *const c_char, mode: c_int) -> c_int;
433     #[link_name = "_access"]
434     pub fn access(path: *const c_char, amode: c_int) -> c_int;
435     #[link_name = "_chdir"]
436     pub fn chdir(dir: *const c_char) -> c_int;
437     #[link_name = "_close"]
438     pub fn close(fd: c_int) -> c_int;
439     #[link_name = "_dup"]
440     pub fn dup(fd: c_int) -> c_int;
441     #[link_name = "_dup2"]
442     pub fn dup2(src: c_int, dst: c_int) -> c_int;
443     #[link_name = "_execl"]
444     pub fn execl(path: *const c_char, arg0: *const c_char, ...) -> intptr_t;
445     #[link_name = "_wexecl"]
446     pub fn wexecl(path: *const wchar_t, arg0: *const wchar_t, ...) -> intptr_t;
447     #[link_name = "_execle"]
448     pub fn execle(path: *const c_char, arg0: *const c_char, ...) -> intptr_t;
449     #[link_name = "_wexecle"]
450     pub fn wexecle(path: *const wchar_t, arg0: *const wchar_t, ...) -> intptr_t;
451     #[link_name = "_execlp"]
452     pub fn execlp(path: *const c_char, arg0: *const c_char, ...) -> intptr_t;
453     #[link_name = "_wexeclp"]
454     pub fn wexeclp(path: *const wchar_t, arg0: *const wchar_t, ...) -> intptr_t;
455     #[link_name = "_execlpe"]
456     pub fn execlpe(path: *const c_char, arg0: *const c_char, ...) -> intptr_t;
457     #[link_name = "_wexeclpe"]
458     pub fn wexeclpe(path: *const wchar_t, arg0: *const wchar_t, ...) -> intptr_t;
459     #[link_name = "_execv"]
460     // DIFF(main): changed to `intptr_t` in e77f551de9
461     pub fn execv(prog: *const c_char, argv: *const *const c_char) -> intptr_t;
462     #[link_name = "_execve"]
463     pub fn execve(
464         prog: *const c_char,
465         argv: *const *const c_char,
466         envp: *const *const c_char,
467     ) -> c_int;
468     #[link_name = "_execvp"]
469     pub fn execvp(c: *const c_char, argv: *const *const c_char) -> c_int;
470     #[link_name = "_execvpe"]
471     pub fn execvpe(
472         c: *const c_char,
473         argv: *const *const c_char,
474         envp: *const *const c_char,
475     ) -> c_int;
476 
477     #[link_name = "_wexecv"]
478     pub fn wexecv(prog: *const wchar_t, argv: *const *const wchar_t) -> intptr_t;
479     #[link_name = "_wexecve"]
480     pub fn wexecve(
481         prog: *const wchar_t,
482         argv: *const *const wchar_t,
483         envp: *const *const wchar_t,
484     ) -> intptr_t;
485     #[link_name = "_wexecvp"]
486     pub fn wexecvp(c: *const wchar_t, argv: *const *const wchar_t) -> intptr_t;
487     #[link_name = "_wexecvpe"]
488     pub fn wexecvpe(
489         c: *const wchar_t,
490         argv: *const *const wchar_t,
491         envp: *const *const wchar_t,
492     ) -> intptr_t;
493     #[link_name = "_getcwd"]
494     pub fn getcwd(buf: *mut c_char, size: c_int) -> *mut c_char;
495     #[link_name = "_getpid"]
496     pub fn getpid() -> c_int;
497     #[link_name = "_isatty"]
498     pub fn isatty(fd: c_int) -> c_int;
499     #[link_name = "_lseek"]
500     pub fn lseek(fd: c_int, offset: c_long, origin: c_int) -> c_long;
501     #[link_name = "_lseeki64"]
502     pub fn lseek64(fd: c_int, offset: c_longlong, origin: c_int) -> c_longlong;
503     #[link_name = "_pipe"]
504     pub fn pipe(fds: *mut c_int, psize: c_uint, textmode: c_int) -> c_int;
505     #[link_name = "_read"]
506     pub fn read(fd: c_int, buf: *mut c_void, count: c_uint) -> c_int;
507     #[link_name = "_rmdir"]
508     pub fn rmdir(path: *const c_char) -> c_int;
509     #[link_name = "_unlink"]
510     pub fn unlink(c: *const c_char) -> c_int;
511     #[link_name = "_write"]
512     pub fn write(fd: c_int, buf: *const c_void, count: c_uint) -> c_int;
513     #[link_name = "_commit"]
514     pub fn commit(fd: c_int) -> c_int;
515     #[link_name = "_get_osfhandle"]
516     pub fn get_osfhandle(fd: c_int) -> intptr_t;
517     #[link_name = "_open_osfhandle"]
518     pub fn open_osfhandle(osfhandle: intptr_t, flags: c_int) -> c_int;
519     pub fn setlocale(category: c_int, locale: *const c_char) -> *mut c_char;
520     #[link_name = "_wsetlocale"]
521     pub fn wsetlocale(category: c_int, locale: *const wchar_t) -> *mut wchar_t;
522     #[link_name = "_aligned_malloc"]
523     pub fn aligned_malloc(size: size_t, alignment: size_t) -> *mut c_void;
524     #[link_name = "_aligned_free"]
525     pub fn aligned_free(ptr: *mut c_void);
526     #[link_name = "_aligned_realloc"]
527     pub fn aligned_realloc(memblock: *mut c_void, size: size_t, alignment: size_t) -> *mut c_void;
528     #[link_name = "_putenv"]
529     pub fn putenv(envstring: *const c_char) -> c_int;
530     #[link_name = "_wputenv"]
531     pub fn wputenv(envstring: *const crate::wchar_t) -> c_int;
532     #[link_name = "_putenv_s"]
533     pub fn putenv_s(envstring: *const c_char, value_string: *const c_char) -> crate::errno_t;
534     #[link_name = "_wputenv_s"]
535     pub fn wputenv_s(
536         envstring: *const crate::wchar_t,
537         value_string: *const crate::wchar_t,
538     ) -> crate::errno_t;
539 }
540 
541 extern "system" {
542     pub fn listen(s: SOCKET, backlog: c_int) -> c_int;
543     pub fn accept(s: SOCKET, addr: *mut crate::sockaddr, addrlen: *mut c_int) -> SOCKET;
544     pub fn bind(s: SOCKET, name: *const crate::sockaddr, namelen: c_int) -> c_int;
545     pub fn connect(s: SOCKET, name: *const crate::sockaddr, namelen: c_int) -> c_int;
546     pub fn getpeername(s: SOCKET, name: *mut crate::sockaddr, nameln: *mut c_int) -> c_int;
547     pub fn getsockname(s: SOCKET, name: *mut crate::sockaddr, nameln: *mut c_int) -> c_int;
548     pub fn getsockopt(
549         s: SOCKET,
550         level: c_int,
551         optname: c_int,
552         optval: *mut c_char,
553         optlen: *mut c_int,
554     ) -> c_int;
555     pub fn recvfrom(
556         s: SOCKET,
557         buf: *mut c_char,
558         len: c_int,
559         flags: c_int,
560         from: *mut crate::sockaddr,
561         fromlen: *mut c_int,
562     ) -> c_int;
563     pub fn sendto(
564         s: SOCKET,
565         buf: *const c_char,
566         len: c_int,
567         flags: c_int,
568         to: *const crate::sockaddr,
569         tolen: c_int,
570     ) -> c_int;
571     pub fn setsockopt(
572         s: SOCKET,
573         level: c_int,
574         optname: c_int,
575         optval: *const c_char,
576         optlen: c_int,
577     ) -> c_int;
578     pub fn socket(af: c_int, socket_type: c_int, protocol: c_int) -> SOCKET;
579 }
580 
581 cfg_if! {
582     if #[cfg(all(target_env = "gnu"))] {
583         mod gnu;
584         pub use self::gnu::*;
585     } else if #[cfg(all(target_env = "msvc"))] {
586         mod msvc;
587         pub use self::msvc::*;
588     } else {
589         // Unknown target_env
590     }
591 }
592