1 /* Copyright (C) 1991, 1992, 1995-2007, 2009, 2010, 2012
2 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
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.
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.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <http://www.gnu.org/licenses/>. */
20 * POSIX Standard: 5.6 File Characteristics <sys/stat.h>
28 #include <bits/types.h> /* For __mode_t and __dev_t. */
30 #if defined __USE_XOPEN || defined __USE_XOPEN2K || defined __USE_MISC \
31 || defined __USE_ATFILE
32 # if defined __USE_XOPEN || defined __USE_XOPEN2K
33 # define __need_time_t
35 # if defined __USE_MISC || defined __USE_ATFILE
36 # define __need_timespec
38 # include <time.h> /* For time_t resp. timespec. */
41 #if defined __USE_XOPEN || defined __USE_XOPEN2K
42 /* The Single Unix specification says that some more types are
44 # ifndef __dev_t_defined
45 typedef __dev_t dev_t;
46 # define __dev_t_defined
49 # ifndef __gid_t_defined
50 typedef __gid_t gid_t;
51 # define __gid_t_defined
54 # ifndef __ino_t_defined
55 # ifndef __USE_FILE_OFFSET64
56 typedef __ino_t ino_t;
58 typedef __ino64_t ino_t;
60 # define __ino_t_defined
63 # ifndef __mode_t_defined
64 typedef __mode_t mode_t;
65 # define __mode_t_defined
68 # ifndef __nlink_t_defined
69 typedef __nlink_t nlink_t;
70 # define __nlink_t_defined
73 # ifndef __off_t_defined
74 # ifndef __USE_FILE_OFFSET64
75 typedef __off_t off_t;
77 typedef __off64_t off_t;
79 # define __off_t_defined
82 # ifndef __uid_t_defined
83 typedef __uid_t uid_t;
84 # define __uid_t_defined
89 # ifndef __blkcnt_t_defined
90 # ifndef __USE_FILE_OFFSET64
91 typedef __blkcnt_t blkcnt_t;
93 typedef __blkcnt64_t blkcnt_t;
95 # define __blkcnt_t_defined
98 # ifndef __blksize_t_defined
99 typedef __blksize_t blksize_t;
100 # define __blksize_t_defined
106 #include <bits/stat.h>
108 #if defined __USE_BSD || defined __USE_MISC || defined __USE_XOPEN
109 # define S_IFMT __S_IFMT
110 # define S_IFDIR __S_IFDIR
111 # define S_IFCHR __S_IFCHR
112 # define S_IFBLK __S_IFBLK
113 # define S_IFREG __S_IFREG
115 # define S_IFIFO __S_IFIFO
118 # define S_IFLNK __S_IFLNK
120 # if (defined __USE_BSD || defined __USE_MISC || defined __USE_UNIX98) \
121 && defined __S_IFSOCK
122 # define S_IFSOCK __S_IFSOCK
126 /* Test macros for file types. */
128 #define __S_ISTYPE(mode, mask) (((mode) & __S_IFMT) == (mask))
130 #define S_ISDIR(mode) __S_ISTYPE((mode), __S_IFDIR)
131 #define S_ISCHR(mode) __S_ISTYPE((mode), __S_IFCHR)
132 #define S_ISBLK(mode) __S_ISTYPE((mode), __S_IFBLK)
133 #define S_ISREG(mode) __S_ISTYPE((mode), __S_IFREG)
135 # define S_ISFIFO(mode) __S_ISTYPE((mode), __S_IFIFO)
138 # define S_ISLNK(mode) __S_ISTYPE((mode), __S_IFLNK)
141 #if defined __USE_BSD && !defined __S_IFLNK
142 # define S_ISLNK(mode) 0
145 #if (defined __USE_BSD || defined __USE_UNIX98 || defined __USE_XOPEN2K) \
146 && defined __S_IFSOCK
147 # define S_ISSOCK(mode) __S_ISTYPE((mode), __S_IFSOCK)
148 #elif defined __USE_XOPEN2K
149 # define S_ISSOCK(mode) 0
152 /* These are from POSIX.1b. If the objects are not implemented using separate
153 distinct file types, the macros always will evaluate to zero. Unlike the
154 other S_* macros the following three take a pointer to a `struct stat'
155 object as the argument. */
156 #ifdef __USE_POSIX199309
157 # define S_TYPEISMQ(buf) __S_TYPEISMQ(buf)
158 # define S_TYPEISSEM(buf) __S_TYPEISSEM(buf)
159 # define S_TYPEISSHM(buf) __S_TYPEISSHM(buf)
163 /* Protection bits. */
165 #define S_ISUID __S_ISUID /* Set user ID on execution. */
166 #define S_ISGID __S_ISGID /* Set group ID on execution. */
168 #if defined __USE_BSD || defined __USE_MISC || defined __USE_XOPEN
169 /* Save swapped text after use (sticky bit). This is pretty well obsolete. */
170 # define S_ISVTX __S_ISVTX
173 #define S_IRUSR __S_IREAD /* Read by owner. */
174 #define S_IWUSR __S_IWRITE /* Write by owner. */
175 #define S_IXUSR __S_IEXEC /* Execute by owner. */
176 /* Read, write, and execute by owner. */
177 #define S_IRWXU (__S_IREAD|__S_IWRITE|__S_IEXEC)
179 #if defined __USE_MISC && defined __USE_BSD
180 # define S_IREAD S_IRUSR
181 # define S_IWRITE S_IWUSR
182 # define S_IEXEC S_IXUSR
185 #define S_IRGRP (S_IRUSR >> 3) /* Read by group. */
186 #define S_IWGRP (S_IWUSR >> 3) /* Write by group. */
187 #define S_IXGRP (S_IXUSR >> 3) /* Execute by group. */
188 /* Read, write, and execute by group. */
189 #define S_IRWXG (S_IRWXU >> 3)
191 #define S_IROTH (S_IRGRP >> 3) /* Read by others. */
192 #define S_IWOTH (S_IWGRP >> 3) /* Write by others. */
193 #define S_IXOTH (S_IXGRP >> 3) /* Execute by others. */
194 /* Read, write, and execute by others. */
195 #define S_IRWXO (S_IRWXG >> 3)
199 /* Macros for common mode bit masks. */
200 # define ACCESSPERMS (S_IRWXU|S_IRWXG|S_IRWXO) /* 0777 */
201 # define ALLPERMS (S_ISUID|S_ISGID|S_ISVTX|S_IRWXU|S_IRWXG|S_IRWXO)/* 07777 */
202 # define DEFFILEMODE (S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH)/* 0666*/
204 # define S_BLKSIZE 512 /* Block size for `st_blocks'. */
208 #ifndef __USE_FILE_OFFSET64
209 /* Get file attributes for FILE and put them in BUF. */
210 extern int stat (const char *__restrict __file,
211 struct stat *__restrict __buf) __THROW __nonnull ((1, 2));
213 /* Get file attributes for the file, device, pipe, or socket
214 that file descriptor FD is open on and put them in BUF. */
215 extern int fstat (int __fd, struct stat *__buf) __THROW __nonnull ((2));
217 # ifdef __REDIRECT_NTH
218 extern int __REDIRECT_NTH (stat, (const char *__restrict __file,
219 struct stat *__restrict __buf), stat64)
221 extern int __REDIRECT_NTH (fstat, (int __fd, struct stat *__buf), fstat64)
225 # define fstat fstat64
228 #ifdef __USE_LARGEFILE64
229 extern int stat64 (const char *__restrict __file,
230 struct stat64 *__restrict __buf) __THROW __nonnull ((1, 2));
231 extern int fstat64 (int __fd, struct stat64 *__buf) __THROW __nonnull ((2));
235 /* Similar to stat, get the attributes for FILE and put them in BUF.
236 Relative path names are interpreted relative to FD unless FD is
238 # ifndef __USE_FILE_OFFSET64
239 extern int fstatat (int __fd, const char *__restrict __file,
240 struct stat *__restrict __buf, int __flag)
241 __THROW __nonnull ((2, 3));
243 # ifdef __REDIRECT_NTH
244 extern int __REDIRECT_NTH (fstatat, (int __fd, const char *__restrict __file,
245 struct stat *__restrict __buf,
247 fstatat64) __nonnull ((2, 3));
249 # define fstatat fstatat64
253 # ifdef __USE_LARGEFILE64
254 extern int fstatat64 (int __fd, const char *__restrict __file,
255 struct stat64 *__restrict __buf, int __flag)
256 __THROW __nonnull ((2, 3));
260 #if defined __USE_BSD || defined __USE_XOPEN_EXTENDED || defined __USE_XOPEN2K
261 # ifndef __USE_FILE_OFFSET64
262 /* Get file attributes about FILE and put them in BUF.
263 If FILE is a symbolic link, do not follow it. */
264 extern int lstat (const char *__restrict __file,
265 struct stat *__restrict __buf) __THROW __nonnull ((1, 2));
267 # ifdef __REDIRECT_NTH
268 extern int __REDIRECT_NTH (lstat,
269 (const char *__restrict __file,
270 struct stat *__restrict __buf), lstat64)
273 # define lstat lstat64
276 # ifdef __USE_LARGEFILE64
277 extern int lstat64 (const char *__restrict __file,
278 struct stat64 *__restrict __buf)
279 __THROW __nonnull ((1, 2));
283 /* Set file access permissions for FILE to MODE.
284 If FILE is a symbolic link, this affects its target instead. */
285 extern int chmod (const char *__file, __mode_t __mode)
286 __THROW __nonnull ((1));
289 /* Set file access permissions for FILE to MODE.
290 If FILE is a symbolic link, this affects the link itself
291 rather than its target. */
292 extern int lchmod (const char *__file, __mode_t __mode)
293 __THROW __nonnull ((1));
296 /* Set file access permissions of the file FD is open on to MODE. */
297 #if defined __USE_BSD || defined __USE_POSIX
298 extern int fchmod (int __fd, __mode_t __mode) __THROW;
302 /* Set file access permissions of FILE relative to
303 the directory FD is open on. */
304 extern int fchmodat (int __fd, const char *__file, __mode_t __mode,
306 __THROW __nonnull ((2)) __wur;
307 #endif /* Use ATFILE. */
311 /* Set the file creation mask of the current process to MASK,
312 and return the old creation mask. */
313 extern __mode_t umask (__mode_t __mask) __THROW;
316 /* Get the current `umask' value without changing it.
317 This function is only available under the GNU Hurd. */
318 extern __mode_t getumask (void) __THROW;
321 /* Create a new directory named PATH, with permission bits MODE. */
322 extern int mkdir (const char *__path, __mode_t __mode)
323 __THROW __nonnull ((1));
326 /* Like mkdir, create a new directory with permission bits MODE. But
327 interpret relative PATH names relative to the directory associated
329 extern int mkdirat (int __fd, const char *__path, __mode_t __mode)
330 __THROW __nonnull ((2));
333 /* Create a device file named PATH, with permission and special bits MODE
334 and device number DEV (which can be constructed from major and minor
335 device numbers with the `makedev' macro above). */
336 #if defined __USE_MISC || defined __USE_BSD || defined __USE_XOPEN_EXTENDED
337 extern int mknod (const char *__path, __mode_t __mode, __dev_t __dev)
338 __THROW __nonnull ((1));
341 /* Like mknod, create a new device file with permission bits MODE and
342 device number DEV. But interpret relative PATH names relative to
343 the directory associated with FD. */
344 extern int mknodat (int __fd, const char *__path, __mode_t __mode,
345 __dev_t __dev) __THROW __nonnull ((2));
350 /* Create a new FIFO named PATH, with permission bits MODE. */
351 extern int mkfifo (const char *__path, __mode_t __mode)
352 __THROW __nonnull ((1));
355 /* Like mkfifo, create a new FIFO with permission bits MODE. But
356 interpret relative PATH names relative to the directory associated
358 extern int mkfifoat (int __fd, const char *__path, __mode_t __mode)
359 __THROW __nonnull ((2));
363 /* Set file access and modification times relative to directory file
365 extern int utimensat (int __fd, const char *__path,
366 const struct timespec __times[2],
368 __THROW __nonnull ((2));
371 #ifdef __USE_XOPEN2K8
372 /* Set file access and modification times of the file associated with FD. */
373 extern int futimens (int __fd, const struct timespec __times[2]) __THROW;
376 /* To allow the `struct stat' structure and the file type `mode_t'
377 bits to vary without changing shared library major version number,
378 the `stat' family of functions and `mknod' are in fact inline
379 wrappers around calls to `xstat', `fxstat', `lxstat', and `xmknod',
380 which all take a leading version-number argument designating the
381 data structure and bits used. <bits/stat.h> defines _STAT_VER with
382 the version number corresponding to `struct stat' as defined in
383 that file; and _MKNOD_VER with the version number corresponding to
384 the S_IF* macros defined therein. It is arranged that when not
385 inlined these function are always statically linked; that way a
386 dynamically-linked executable always encodes the version number
387 corresponding to the data structures it uses, so the `x' functions
388 in the shared library can adapt without needing to recompile all
395 # define _MKNOD_VER 0
398 /* Wrappers for stat and mknod system calls. */
399 #ifndef __USE_FILE_OFFSET64
400 extern int __fxstat (int __ver, int __fildes, struct stat *__stat_buf)
401 __THROW __nonnull ((3));
402 extern int __xstat (int __ver, const char *__filename,
403 struct stat *__stat_buf) __THROW __nonnull ((2, 3));
404 extern int __lxstat (int __ver, const char *__filename,
405 struct stat *__stat_buf) __THROW __nonnull ((2, 3));
406 extern int __fxstatat (int __ver, int __fildes, const char *__filename,
407 struct stat *__stat_buf, int __flag)
408 __THROW __nonnull ((3, 4));
410 # ifdef __REDIRECT_NTH
411 extern int __REDIRECT_NTH (__fxstat, (int __ver, int __fildes,
412 struct stat *__stat_buf), __fxstat64)
414 extern int __REDIRECT_NTH (__xstat, (int __ver, const char *__filename,
415 struct stat *__stat_buf), __xstat64)
417 extern int __REDIRECT_NTH (__lxstat, (int __ver, const char *__filename,
418 struct stat *__stat_buf), __lxstat64)
420 extern int __REDIRECT_NTH (__fxstatat, (int __ver, int __fildes,
421 const char *__filename,
422 struct stat *__stat_buf, int __flag),
423 __fxstatat64) __nonnull ((3, 4));
426 # define __fxstat __fxstat64
427 # define __xstat __xstat64
428 # define __lxstat __lxstat64
432 #ifdef __USE_LARGEFILE64
433 extern int __fxstat64 (int __ver, int __fildes, struct stat64 *__stat_buf)
434 __THROW __nonnull ((3));
435 extern int __xstat64 (int __ver, const char *__filename,
436 struct stat64 *__stat_buf) __THROW __nonnull ((2, 3));
437 extern int __lxstat64 (int __ver, const char *__filename,
438 struct stat64 *__stat_buf) __THROW __nonnull ((2, 3));
439 extern int __fxstatat64 (int __ver, int __fildes, const char *__filename,
440 struct stat64 *__stat_buf, int __flag)
441 __THROW __nonnull ((3, 4));
443 extern int __xmknod (int __ver, const char *__path, __mode_t __mode,
444 __dev_t *__dev) __THROW __nonnull ((2, 4));
446 extern int __xmknodat (int __ver, int __fd, const char *__path,
447 __mode_t __mode, __dev_t *__dev)
448 __THROW __nonnull ((3, 5));
450 #if defined __GNUC__ && __GNUC__ >= 2 && defined __USE_EXTERN_INLINES
451 /* Inlined versions of the real stat and mknod functions. */
454 __NTH (stat (const char *__path, struct stat *__statbuf))
456 return __xstat (_STAT_VER, __path, __statbuf);
459 # if defined __USE_BSD || defined __USE_XOPEN_EXTENDED
461 __NTH (lstat (const char *__path, struct stat *__statbuf))
463 return __lxstat (_STAT_VER, __path, __statbuf);
468 __NTH (fstat (int __fd, struct stat *__statbuf))
470 return __fxstat (_STAT_VER, __fd, __statbuf);
475 __NTH (fstatat (int __fd, const char *__filename, struct stat *__statbuf,
478 return __fxstatat (_STAT_VER, __fd, __filename, __statbuf, __flag);
482 # if defined __USE_MISC || defined __USE_BSD
484 __NTH (mknod (const char *__path, __mode_t __mode, __dev_t __dev))
486 return __xmknod (_MKNOD_VER, __path, __mode, &__dev);
492 __NTH (mknodat (int __fd, const char *__path, __mode_t __mode,
495 return __xmknodat (_MKNOD_VER, __fd, __path, __mode, &__dev);
499 # if defined __USE_LARGEFILE64 \
500 && (! defined __USE_FILE_OFFSET64 \
501 || (defined __REDIRECT_NTH && defined __OPTIMIZE__))
503 __NTH (stat64 (const char *__path, struct stat64 *__statbuf))
505 return __xstat64 (_STAT_VER, __path, __statbuf);
508 # if defined __USE_BSD || defined __USE_XOPEN_EXTENDED
510 __NTH (lstat64 (const char *__path, struct stat64 *__statbuf))
512 return __lxstat64 (_STAT_VER, __path, __statbuf);
517 __NTH (fstat64 (int __fd, struct stat64 *__statbuf))
519 return __fxstat64 (_STAT_VER, __fd, __statbuf);
524 __NTH (fstatat64 (int __fd, const char *__filename, struct stat64 *__statbuf,
527 return __fxstatat64 (_STAT_VER, __fd, __filename, __statbuf, __flag);
538 #endif /* sys/stat.h */