1 /* Copyright (C) 1991, 1992, 1995-2004, 2005, 2006, 2007
2 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, write to the Free
17 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
18 02111-1307 USA. */
19
20 /*
21 * POSIX Standard: 5.6 File Characteristics <sys/stat.h>
22 */
23
24 #ifndef _SYS_STAT_H
25 #define _SYS_STAT_H 1
26
27 #include <features.h>
28
29 #include <bits/types.h> /* For __mode_t and __dev_t. */
30
31 #if defined __USE_XOPEN || defined __USE_XOPEN2K || defined __USE_MISC \
32 || defined __USE_ATFILE
33 # if defined __USE_XOPEN || defined __USE_XOPEN2K
34 # define __need_time_t
35 # endif
36 # if defined __USE_MISC || defined __USE_ATFILE
37 # define __need_timespec
38 # endif
39 # include <time.h> /* For time_t resp. timespec. */
40 #endif
41
42 #if defined __USE_XOPEN || defined __USE_XOPEN2K
43 /* The Single Unix specification says that some more types are
44 available here. */
45 # ifndef __dev_t_defined
46 typedef __dev_t dev_t;
47 # define __dev_t_defined
48 # endif
49
50 # ifndef __gid_t_defined
51 typedef __gid_t gid_t;
52 # define __gid_t_defined
53 # endif
54
55 # ifndef __ino_t_defined
56 # ifndef __USE_FILE_OFFSET64
57 typedef __ino_t ino_t;
58 # else
59 typedef __ino64_t ino_t;
60 # endif
61 # define __ino_t_defined
62 # endif
63
64 # ifndef __mode_t_defined
65 typedef __mode_t mode_t;
66 # define __mode_t_defined
67 # endif
68
69 # ifndef __nlink_t_defined
70 typedef __nlink_t nlink_t;
71 # define __nlink_t_defined
72 # endif
73
74 # ifndef __off_t_defined
75 # ifndef __USE_FILE_OFFSET64
76 typedef __off_t off_t;
77 # else
78 typedef __off64_t off_t;
79 # endif
80 # define __off_t_defined
81 # endif
82
83 # ifndef __uid_t_defined
84 typedef __uid_t uid_t;
85 # define __uid_t_defined
86 # endif
87 #endif /* X/Open */
88
89 #ifdef __USE_UNIX98
90 # ifndef __blkcnt_t_defined
91 # ifndef __USE_FILE_OFFSET64
92 typedef __blkcnt_t blkcnt_t;
93 # else
94 typedef __blkcnt64_t blkcnt_t;
95 # endif
96 # define __blkcnt_t_defined
97 # endif
98
99 # ifndef __blksize_t_defined
100 typedef __blksize_t blksize_t;
101 # define __blksize_t_defined
102 # endif
103 #endif /* Unix98 */
104
105 __BEGIN_DECLS
106
107 #include <bits/stat.h>
108
109 #if defined __USE_BSD || defined __USE_MISC || defined __USE_XOPEN
110 # define S_IFMT __S_IFMT
111 # define S_IFDIR __S_IFDIR
112 # define S_IFCHR __S_IFCHR
113 # define S_IFBLK __S_IFBLK
114 # define S_IFREG __S_IFREG
115 # ifdef __S_IFIFO
116 # define S_IFIFO __S_IFIFO
117 # endif
118 # ifdef __S_IFLNK
119 # define S_IFLNK __S_IFLNK
120 # endif
121 # if (defined __USE_BSD || defined __USE_MISC || defined __USE_UNIX98) \
122 && defined __S_IFSOCK
123 # define S_IFSOCK __S_IFSOCK
124 # endif
125 #endif
126
127 /* Test macros for file types. */
128
129 #define __S_ISTYPE(mode, mask) (((mode) & __S_IFMT) == (mask))
130
131 #define S_ISDIR(mode) __S_ISTYPE((mode), __S_IFDIR)
132 #define S_ISCHR(mode) __S_ISTYPE((mode), __S_IFCHR)
133 #define S_ISBLK(mode) __S_ISTYPE((mode), __S_IFBLK)
134 #define S_ISREG(mode) __S_ISTYPE((mode), __S_IFREG)
135 #ifdef __S_IFIFO
136 # define S_ISFIFO(mode) __S_ISTYPE((mode), __S_IFIFO)
137 #endif
138 #ifdef __S_IFLNK
139 # define S_ISLNK(mode) __S_ISTYPE((mode), __S_IFLNK)
140 #endif
141
142 #if defined __USE_BSD && !defined __S_IFLNK
143 # define S_ISLNK(mode) 0
144 #endif
145
146 #if (defined __USE_BSD || defined __USE_UNIX98) \
147 && defined __S_IFSOCK
148 # define S_ISSOCK(mode) __S_ISTYPE((mode), __S_IFSOCK)
149 #endif
150
151 /* These are from POSIX.1b. If the objects are not implemented using separate
152 distinct file types, the macros always will evaluate to zero. Unlike the
153 other S_* macros the following three take a pointer to a `struct stat'
154 object as the argument. */
155 #ifdef __USE_POSIX199309
156 # define S_TYPEISMQ(buf) __S_TYPEISMQ(buf)
157 # define S_TYPEISSEM(buf) __S_TYPEISSEM(buf)
158 # define S_TYPEISSHM(buf) __S_TYPEISSHM(buf)
159 #endif
160
161
162 /* Protection bits. */
163
164 #define S_ISUID __S_ISUID /* Set user ID on execution. */
165 #define S_ISGID __S_ISGID /* Set group ID on execution. */
166
167 #if defined __USE_BSD || defined __USE_MISC || defined __USE_XOPEN
168 /* Save swapped text after use (sticky bit). This is pretty well obsolete. */
169 # define S_ISVTX __S_ISVTX
170 #endif
171
172 #define S_IRUSR __S_IREAD /* Read by owner. */
173 #define S_IWUSR __S_IWRITE /* Write by owner. */
174 #define S_IXUSR __S_IEXEC /* Execute by owner. */
175 /* Read, write, and execute by owner. */
176 #define S_IRWXU (__S_IREAD|__S_IWRITE|__S_IEXEC)
177
178 #if defined __USE_MISC && defined __USE_BSD
179 # define S_IREAD S_IRUSR
180 # define S_IWRITE S_IWUSR
181 # define S_IEXEC S_IXUSR
182 #endif
183
184 #define S_IRGRP (S_IRUSR >> 3) /* Read by group. */
185 #define S_IWGRP (S_IWUSR >> 3) /* Write by group. */
186 #define S_IXGRP (S_IXUSR >> 3) /* Execute by group. */
187 /* Read, write, and execute by group. */
188 #define S_IRWXG (S_IRWXU >> 3)
189
190 #define S_IROTH (S_IRGRP >> 3) /* Read by others. */
191 #define S_IWOTH (S_IWGRP >> 3) /* Write by others. */
192 #define S_IXOTH (S_IXGRP >> 3) /* Execute by others. */
193 /* Read, write, and execute by others. */
194 #define S_IRWXO (S_IRWXG >> 3)
195
196
197 #ifdef __USE_BSD
198 /* Macros for common mode bit masks. */
199 # define ACCESSPERMS (S_IRWXU|S_IRWXG|S_IRWXO) /* 0777 */
200 # define ALLPERMS (S_ISUID|S_ISGID|S_ISVTX|S_IRWXU|S_IRWXG|S_IRWXO)/* 07777 */
201 # define DEFFILEMODE (S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH)/* 0666*/
202
203 # define S_BLKSIZE 512 /* Block size for `st_blocks'. */
204 #endif
205
206
207 #ifndef __USE_FILE_OFFSET64
208 /* Get file attributes for FILE and put them in BUF. */
209 extern int stat (__const char *__restrict __file,
210 struct stat *__restrict __buf) __THROW __nonnull ((1, 2));
211
212 /* Get file attributes for the file, device, pipe, or socket
213 that file descriptor FD is open on and put them in BUF. */
214 extern int fstat (int __fd, struct stat *__buf) __THROW __nonnull ((2));
215 #else
216 # ifdef __REDIRECT_NTH
217 extern int __REDIRECT_NTH (stat, (__const char *__restrict __file,
218 struct stat *__restrict __buf), stat64)
219 __nonnull ((1, 2));
220 extern int __REDIRECT_NTH (fstat, (int __fd, struct stat *__buf), fstat64)
221 __nonnull ((2));
222 # else
223 # define stat stat64
224 # define fstat fstat64
225 # endif
226 #endif
227 #ifdef __USE_LARGEFILE64
228 extern int stat64 (__const char *__restrict __file,
229 struct stat64 *__restrict __buf) __THROW __nonnull ((1, 2));
230 extern int fstat64 (int __fd, struct stat64 *__buf) __THROW __nonnull ((2));
231 #endif
232
233 #ifdef __USE_ATFILE
234 /* Similar to stat, get the attributes for FILE and put them in BUF.
235 Relative path names are interpreted relative to FD unless FD is
236 AT_FDCWD. */
237 # ifndef __USE_FILE_OFFSET64
238 extern int fstatat (int __fd, __const char *__restrict __file,
239 struct stat *__restrict __buf, int __flag)
240 __THROW __nonnull ((2, 3));
241 # else
242 # ifdef __REDIRECT_NTH
243 extern int __REDIRECT_NTH (fstatat, (int __fd, __const char *__restrict __file,
244 struct stat *__restrict __buf,
245 int __flag),
246 fstatat64) __nonnull ((2, 3));
247 # else
248 # define fstatat fstatat64
249 # endif
250 # endif
251
252 extern int fstatat64 (int __fd, __const char *__restrict __file,
253 struct stat64 *__restrict __buf, int __flag)
254 __THROW __nonnull ((2, 3));
255 #endif
256
257 #if defined __USE_BSD || defined __USE_XOPEN_EXTENDED
258 # ifndef __USE_FILE_OFFSET64
259 /* Get file attributes about FILE and put them in BUF.
260 If FILE is a symbolic link, do not follow it. */
261 extern int lstat (__const char *__restrict __file,
262 struct stat *__restrict __buf) __THROW __nonnull ((1, 2));
263 # else
264 # ifdef __REDIRECT_NTH
265 extern int __REDIRECT_NTH (lstat,
266 (__const char *__restrict __file,
267 struct stat *__restrict __buf), lstat64)
268 __nonnull ((1, 2));
269 # else
270 # define lstat lstat64
271 # endif
272 # endif
273 # ifdef __USE_LARGEFILE64
274 extern int lstat64 (__const char *__restrict __file,
275 struct stat64 *__restrict __buf)
276 __THROW __nonnull ((1, 2));
277 # endif
278 #endif
279
280 /* Set file access permissions for FILE to MODE.
281 If FILE is a symbolic link, this affects its target instead. */
282 extern int chmod (__const char *__file, __mode_t __mode)
283 __THROW __nonnull ((1));
284
285 #ifdef __USE_BSD
286 /* Set file access permissions for FILE to MODE.
287 If FILE is a symbolic link, this affects the link itself
288 rather than its target. */
289 extern int lchmod (__const char *__file, __mode_t __mode)
290 __THROW __nonnull ((1));
291 #endif
292
293 /* Set file access permissions of the file FD is open on to MODE. */
294 #if defined __USE_BSD || defined __USE_XOPEN_EXTENDED
295 extern int fchmod (int __fd, __mode_t __mode) __THROW;
296 #endif
297
298 #ifdef __USE_ATFILE
299 /* Set file access permissions of FILE relative to
300 the directory FD is open on. */
301 extern int fchmodat (int __fd, __const char *__file, __mode_t mode, int __flag)
302 __THROW __nonnull ((2)) __wur;
303 #endif /* Use ATFILE. */
304
305
306
307 /* Set the file creation mask of the current process to MASK,
308 and return the old creation mask. */
309 extern __mode_t umask (__mode_t __mask) __THROW;
310
311 #ifdef __USE_GNU
312 /* Get the current `umask' value without changing it.
313 This function is only available under the GNU Hurd. */
314 extern __mode_t getumask (void) __THROW;
315 #endif
316
317 /* Create a new directory named PATH, with permission bits MODE. */
318 extern int mkdir (__const char *__path, __mode_t __mode)
319 __THROW __nonnull ((1));
320
321 #ifdef __USE_ATFILE
322 /* Like mkdir, create a new directory with permission bits MODE. But
323 interpret relative PATH names relative to the directory associated
324 with FD. */
325 extern int mkdirat (int __fd, __const char *__path, __mode_t __mode)
326 __THROW __nonnull ((2));
327 #endif
328
329 /* Create a device file named PATH, with permission and special bits MODE
330 and device number DEV (which can be constructed from major and minor
331 device numbers with the `makedev' macro above). */
332 #if defined __USE_MISC || defined __USE_BSD || defined __USE_XOPEN_EXTENDED
333 extern int mknod (__const char *__path, __mode_t __mode, __dev_t __dev)
334 __THROW __nonnull ((1));
335 #endif
336
337 #ifdef __USE_ATFILE
338 /* Like mknod, create a new device file with permission bits MODE and
339 device number DEV. But interpret relative PATH names relative to
340 the directory associated with FD. */
341 extern int mknodat (int __fd, __const char *__path, __mode_t __mode,
342 __dev_t __dev) __THROW __nonnull ((2));
343 #endif
344
345
346 /* Create a new FIFO named PATH, with permission bits MODE. */
347 extern int mkfifo (__const char *__path, __mode_t __mode)
348 __THROW __nonnull ((1));
349
350 #ifdef __USE_ATFILE
351 /* Like mkfifo, create a new FIFO with permission bits MODE. But
352 interpret relative PATH names relative to the directory associated
353 with FD. */
354 extern int mkfifoat (int __fd, __const char *__path, __mode_t __mode)
355 __THROW __nonnull ((2));
356 #endif
357
358 #ifdef __USE_ATFILE
359 /* Set file access and modification times relative to directory file
360 descriptor. */
361 extern int utimensat (int __fd, __const char *__path,
362 __const struct timespec __times[2],
363 int __flags)
364 __THROW __nonnull ((2));
365 #endif
366
367 #ifdef __USE_GNU
368 /* XXX This will change to the macro for the next 2008 POSIX revision. */
369 /* Set file access and modification times of the file associated with FD. */
370 extern int futimens (int __fd, __const struct timespec __times[2]) __THROW;
371 #endif
372
373 /* To allow the `struct stat' structure and the file type `mode_t'
374 bits to vary without changing shared library major version number,
375 the `stat' family of functions and `mknod' are in fact inline
376 wrappers around calls to `xstat', `fxstat', `lxstat', and `xmknod',
377 which all take a leading version-number argument designating the
378 data structure and bits used. <bits/stat.h> defines _STAT_VER with
379 the version number corresponding to `struct stat' as defined in
380 that file; and _MKNOD_VER with the version number corresponding to
381 the S_IF* macros defined therein. It is arranged that when not
382 inlined these function are always statically linked; that way a
383 dynamically-linked executable always encodes the version number
384 corresponding to the data structures it uses, so the `x' functions
385 in the shared library can adapt without needing to recompile all
386 callers. */
387
388 #ifndef _STAT_VER
389 # define _STAT_VER 0
390 #endif
391 #ifndef _MKNOD_VER
392 # define _MKNOD_VER 0
393 #endif
394
395 /* Wrappers for stat and mknod system calls. */
396 #ifndef __USE_FILE_OFFSET64
397 extern int __fxstat (int __ver, int __fildes, struct stat *__stat_buf)
398 __THROW __nonnull ((3));
399 extern int __xstat (int __ver, __const char *__filename,
400 struct stat *__stat_buf) __THROW __nonnull ((2, 3));
401 extern int __lxstat (int __ver, __const char *__filename,
402 struct stat *__stat_buf) __THROW __nonnull ((2, 3));
403 extern int __fxstatat (int __ver, int __fildes, __const char *__filename,
404 struct stat *__stat_buf, int __flag)
405 __THROW __nonnull ((3, 4));
406 #else
407 # ifdef __REDIRECT_NTH
408 extern int __REDIRECT_NTH (__fxstat, (int __ver, int __fildes,
409 struct stat *__stat_buf), __fxstat64)
410 __nonnull ((3));
411 extern int __REDIRECT_NTH (__xstat, (int __ver, __const char *__filename,
412 struct stat *__stat_buf), __xstat64)
413 __nonnull ((2, 3));
414 extern int __REDIRECT_NTH (__lxstat, (int __ver, __const char *__filename,
415 struct stat *__stat_buf), __lxstat64)
416 __nonnull ((2, 3));
417 extern int __REDIRECT_NTH (__fxstatat, (int __ver, int __fildes,
418 __const char *__filename,
419 struct stat *__stat_buf, int __flag),
420 __fxstatat64) __nonnull ((3, 4));
421
422 # else
423 # define __fxstat __fxstat64
424 # define __xstat __xstat64
425 # define __lxstat __lxstat64
426 # endif
427 #endif
428
429 #ifdef __USE_LARGEFILE64
430 extern int __fxstat64 (int __ver, int __fildes, struct stat64 *__stat_buf)
431 __THROW __nonnull ((3));
432 extern int __xstat64 (int __ver, __const char *__filename,
433 struct stat64 *__stat_buf) __THROW __nonnull ((2, 3));
434 extern int __lxstat64 (int __ver, __const char *__filename,
435 struct stat64 *__stat_buf) __THROW __nonnull ((2, 3));
436 extern int __fxstatat64 (int __ver, int __fildes, __const char *__filename,
437 struct stat64 *__stat_buf, int __flag)
438 __THROW __nonnull ((3, 4));
439 #endif
440 extern int __xmknod (int __ver, __const char *__path, __mode_t __mode,
441 __dev_t *__dev) __THROW __nonnull ((2, 4));
442
443 extern int __xmknodat (int __ver, int __fd, __const char *__path,
444 __mode_t __mode, __dev_t *__dev)
445 __THROW __nonnull ((3, 5));
446
447 #if defined __GNUC__ && __GNUC__ >= 2 && defined __USE_EXTERN_INLINES_IN_LIBC
448 /* Inlined versions of the real stat and mknod functions. */
449
450 __extern_inline int
__NTH(stat (__const char * __path,struct stat * __statbuf))451 __NTH (stat (__const char *__path, struct stat *__statbuf))
452 {
453 return __xstat (_STAT_VER, __path, __statbuf);
454 }
455
456 # if defined __USE_BSD || defined __USE_XOPEN_EXTENDED
457 __extern_inline int
__NTH(lstat (__const char * __path,struct stat * __statbuf))458 __NTH (lstat (__const char *__path, struct stat *__statbuf))
459 {
460 return __lxstat (_STAT_VER, __path, __statbuf);
461 }
462 # endif
463
464 __extern_inline int
__NTH(fstat (int __fd,struct stat * __statbuf))465 __NTH (fstat (int __fd, struct stat *__statbuf))
466 {
467 return __fxstat (_STAT_VER, __fd, __statbuf);
468 }
469
470 # ifdef __USE_ATFILE
471 __extern_inline int
__NTH(fstatat (int __fd,__const char * __filename,struct stat * __statbuf,int __flag))472 __NTH (fstatat (int __fd, __const char *__filename, struct stat *__statbuf,
473 int __flag))
474 {
475 return __fxstatat (_STAT_VER, __fd, __filename, __statbuf, __flag);
476 }
477 # endif
478
479 # if defined __USE_MISC || defined __USE_BSD
480 __extern_inline int
__NTH(mknod (__const char * __path,__mode_t __mode,__dev_t __dev))481 __NTH (mknod (__const char *__path, __mode_t __mode, __dev_t __dev))
482 {
483 return __xmknod (_MKNOD_VER, __path, __mode, &__dev);
484 }
485 # endif
486
487 # ifdef __USE_ATFILE
488 __extern_inline int
__NTH(mknodat (int __fd,__const char * __path,__mode_t __mode,__dev_t __dev))489 __NTH (mknodat (int __fd, __const char *__path, __mode_t __mode,
490 __dev_t __dev))
491 {
492 return __xmknodat (_MKNOD_VER, __fd, __path, __mode, &__dev);
493 }
494 # endif
495
496 # if defined __USE_LARGEFILE64 \
497 && (! defined __USE_FILE_OFFSET64 \
498 || (defined __REDIRECT_NTH && defined __OPTIMIZE__))
499 __extern_inline int
__NTH(stat64 (__const char * __path,struct stat64 * __statbuf))500 __NTH (stat64 (__const char *__path, struct stat64 *__statbuf))
501 {
502 return __xstat64 (_STAT_VER, __path, __statbuf);
503 }
504
505 # if defined __USE_BSD || defined __USE_XOPEN_EXTENDED
506 __extern_inline int
__NTH(lstat64 (__const char * __path,struct stat64 * __statbuf))507 __NTH (lstat64 (__const char *__path, struct stat64 *__statbuf))
508 {
509 return __lxstat64 (_STAT_VER, __path, __statbuf);
510 }
511 # endif
512
513 __extern_inline int
__NTH(fstat64 (int __fd,struct stat64 * __statbuf))514 __NTH (fstat64 (int __fd, struct stat64 *__statbuf))
515 {
516 return __fxstat64 (_STAT_VER, __fd, __statbuf);
517 }
518
519 # ifdef __USE_GNU
520 __extern_inline int
__NTH(fstatat64 (int __fd,__const char * __filename,struct stat64 * __statbuf,int __flag))521 __NTH (fstatat64 (int __fd, __const char *__filename, struct stat64 *__statbuf,
522 int __flag))
523 {
524 return __fxstatat64 (_STAT_VER, __fd, __filename, __statbuf, __flag);
525 }
526 # endif
527
528 # endif
529
530 #endif
531
532 __END_DECLS
533
534
535 #endif /* sys/stat.h */
536