1/* Copyright (C) 1991-2016 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
8
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
13
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, see
16 <http://www.gnu.org/licenses/>. */
17
18/*
19 * POSIX Standard: 5.6 File Characteristics <sys/stat.h>
20 */
21
22#ifndef _SYS_STAT_H
23#define _SYS_STAT_H 1
24
25#include <features.h>
26
27#include <bits/types.h> /* For __mode_t and __dev_t. */
28
29#if defined __USE_XOPEN || defined __USE_XOPEN2K || defined __USE_ATFILE
30# if defined __USE_XOPEN || defined __USE_XOPEN2K
31# define __need_time_t
32# endif
33# ifdef __USE_ATFILE
34# define __need_timespec
35# endif
36# include <time.h> /* For time_t resp. timespec. */
37#endif
38
39#if defined __USE_XOPEN || defined __USE_XOPEN2K
40/* The Single Unix specification says that some more types are
41 available here. */
42# ifndef __dev_t_defined
43typedef __dev_t dev_t;
44# define __dev_t_defined
45# endif
46
47# ifndef __gid_t_defined
48typedef __gid_t gid_t;
49# define __gid_t_defined
50# endif
51
52# ifndef __ino_t_defined
53# ifndef __USE_FILE_OFFSET64
54typedef __ino_t ino_t;
55# else
56typedef __ino64_t ino_t;
57# endif
58# define __ino_t_defined
59# endif
60
61# ifndef __mode_t_defined
62typedef __mode_t mode_t;
63# define __mode_t_defined
64# endif
65
66# ifndef __nlink_t_defined
67typedef __nlink_t nlink_t;
68# define __nlink_t_defined
69# endif
70
71# ifndef __off_t_defined
72# ifndef __USE_FILE_OFFSET64
73typedef __off_t off_t;
74# else
75typedef __off64_t off_t;
76# endif
77# define __off_t_defined
78# endif
79
80# ifndef __uid_t_defined
81typedef __uid_t uid_t;
82# define __uid_t_defined
83# endif
84#endif /* X/Open */
85
86#ifdef __USE_UNIX98
87# ifndef __blkcnt_t_defined
88# ifndef __USE_FILE_OFFSET64
89typedef __blkcnt_t blkcnt_t;
90# else
91typedef __blkcnt64_t blkcnt_t;
92# endif
93# define __blkcnt_t_defined
94# endif
95
96# ifndef __blksize_t_defined
97typedef __blksize_t blksize_t;
98# define __blksize_t_defined
99# endif
100#endif /* Unix98 */
101
102__BEGIN_DECLS
103
104#include <bits/stat.h>
105
106#if defined __USE_MISC || defined __USE_XOPEN
107# define S_IFMT __S_IFMT
108# define S_IFDIR __S_IFDIR
109# define S_IFCHR __S_IFCHR
110# define S_IFBLK __S_IFBLK
111# define S_IFREG __S_IFREG
112# ifdef __S_IFIFO
113# define S_IFIFO __S_IFIFO
114# endif
115# ifdef __S_IFLNK
116# define S_IFLNK __S_IFLNK
117# endif
118# if (defined __USE_MISC || defined __USE_UNIX98) \
119 && defined __S_IFSOCK
120# define S_IFSOCK __S_IFSOCK
121# endif
122#endif
123
124/* Test macros for file types. */
125
126#define __S_ISTYPE(mode, mask) (((mode) & __S_IFMT) == (mask))
127
128#define S_ISDIR(mode) __S_ISTYPE((mode), __S_IFDIR)
129#define S_ISCHR(mode) __S_ISTYPE((mode), __S_IFCHR)
130#define S_ISBLK(mode) __S_ISTYPE((mode), __S_IFBLK)
131#define S_ISREG(mode) __S_ISTYPE((mode), __S_IFREG)
132#ifdef __S_IFIFO
133# define S_ISFIFO(mode) __S_ISTYPE((mode), __S_IFIFO)
134#endif
135#ifdef __S_IFLNK
136# define S_ISLNK(mode) __S_ISTYPE((mode), __S_IFLNK)
137#endif
138
139#if defined __USE_MISC && !defined __S_IFLNK
140# define S_ISLNK(mode) 0
141#endif
142
143#if (defined __USE_UNIX98 || defined __USE_XOPEN2K) \
144 && defined __S_IFSOCK
145# define S_ISSOCK(mode) __S_ISTYPE((mode), __S_IFSOCK)
146#elif defined __USE_XOPEN2K
147# define S_ISSOCK(mode) 0
148#endif
149
150/* These are from POSIX.1b. If the objects are not implemented using separate
151 distinct file types, the macros always will evaluate to zero. Unlike the
152 other S_* macros the following three take a pointer to a `struct stat'
153 object as the argument. */
154#ifdef __USE_POSIX199309
155# define S_TYPEISMQ(buf) __S_TYPEISMQ(buf)
156# define S_TYPEISSEM(buf) __S_TYPEISSEM(buf)
157# define S_TYPEISSHM(buf) __S_TYPEISSHM(buf)
158#endif
159
160
161/* Protection bits. */
162
163#define S_ISUID __S_ISUID /* Set user ID on execution. */
164#define S_ISGID __S_ISGID /* Set group ID on execution. */
165
166#if defined __USE_MISC || defined __USE_XOPEN
167/* Save swapped text after use (sticky bit). This is pretty well obsolete. */
168# define S_ISVTX __S_ISVTX
169#endif
170
171#define S_IRUSR __S_IREAD /* Read by owner. */
172#define S_IWUSR __S_IWRITE /* Write by owner. */
173#define S_IXUSR __S_IEXEC /* Execute by owner. */
174/* Read, write, and execute by owner. */
175#define S_IRWXU (__S_IREAD|__S_IWRITE|__S_IEXEC)
176
177#ifdef __USE_MISC
178# define S_IREAD S_IRUSR
179# define S_IWRITE S_IWUSR
180# define S_IEXEC S_IXUSR
181#endif
182
183#define S_IRGRP (S_IRUSR >> 3) /* Read by group. */
184#define S_IWGRP (S_IWUSR >> 3) /* Write by group. */
185#define S_IXGRP (S_IXUSR >> 3) /* Execute by group. */
186/* Read, write, and execute by group. */
187#define S_IRWXG (S_IRWXU >> 3)
188
189#define S_IROTH (S_IRGRP >> 3) /* Read by others. */
190#define S_IWOTH (S_IWGRP >> 3) /* Write by others. */
191#define S_IXOTH (S_IXGRP >> 3) /* Execute by others. */
192/* Read, write, and execute by others. */
193#define S_IRWXO (S_IRWXG >> 3)
194
195
196#ifdef __USE_MISC
197/* Macros for common mode bit masks. */
198# define ACCESSPERMS (S_IRWXU|S_IRWXG|S_IRWXO) /* 0777 */
199# define ALLPERMS (S_ISUID|S_ISGID|S_ISVTX|S_IRWXU|S_IRWXG|S_IRWXO)/* 07777 */
200# define DEFFILEMODE (S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH)/* 0666*/
201
202# define S_BLKSIZE 512 /* Block size for `st_blocks'. */
203#endif
204
205
206#ifndef __USE_FILE_OFFSET64
207/* Get file attributes for FILE and put them in BUF. */
208extern int stat (const char *__restrict __file,
209 struct stat *__restrict __buf) __THROW __nonnull ((1, 2));
210
211/* Get file attributes for the file, device, pipe, or socket
212 that file descriptor FD is open on and put them in BUF. */
213extern int fstat (int __fd, struct stat *__buf) __THROW __nonnull ((2));
214#else
215# ifdef __REDIRECT_NTH
216extern int __REDIRECT_NTH (stat, (const char *__restrict __file,
217 struct stat *__restrict __buf), stat64)
218 __nonnull ((1, 2));
219extern int __REDIRECT_NTH (fstat, (int __fd, struct stat *__buf), fstat64)
220 __nonnull ((2));
221# else
222# define stat stat64
223# define fstat fstat64
224# endif
225#endif
226#ifdef __USE_LARGEFILE64
227extern int stat64 (const char *__restrict __file,
228 struct stat64 *__restrict __buf) __THROW __nonnull ((1, 2));
229extern int fstat64 (int __fd, struct stat64 *__buf) __THROW __nonnull ((2));
230#endif
231
232#ifdef __USE_ATFILE
233/* Similar to stat, get the attributes for FILE and put them in BUF.
234 Relative path names are interpreted relative to FD unless FD is
235 AT_FDCWD. */
236# ifndef __USE_FILE_OFFSET64
237extern int fstatat (int __fd, const char *__restrict __file,
238 struct stat *__restrict __buf, int __flag)
239 __THROW __nonnull ((2, 3));
240# else
241# ifdef __REDIRECT_NTH
242extern int __REDIRECT_NTH (fstatat, (int __fd, const char *__restrict __file,
243 struct stat *__restrict __buf,
244 int __flag),
245 fstatat64) __nonnull ((2, 3));
246# else
247# define fstatat fstatat64
248# endif
249# endif
250
251# ifdef __USE_LARGEFILE64
252extern int fstatat64 (int __fd, const char *__restrict __file,
253 struct stat64 *__restrict __buf, int __flag)
254 __THROW __nonnull ((2, 3));
255# endif
256#endif
257
258#if defined __USE_XOPEN_EXTENDED || defined __USE_XOPEN2K
259# ifndef __USE_FILE_OFFSET64
260/* Get file attributes about FILE and put them in BUF.
261 If FILE is a symbolic link, do not follow it. */
262extern int lstat (const char *__restrict __file,
263 struct stat *__restrict __buf) __THROW __nonnull ((1, 2));
264# else
265# ifdef __REDIRECT_NTH
266extern int __REDIRECT_NTH (lstat,
267 (const char *__restrict __file,
268 struct stat *__restrict __buf), lstat64)
269 __nonnull ((1, 2));
270# else
271# define lstat lstat64
272# endif
273# endif
274# ifdef __USE_LARGEFILE64
275extern int lstat64 (const char *__restrict __file,
276 struct stat64 *__restrict __buf)
277 __THROW __nonnull ((1, 2));
278# endif
279#endif
280
281/* Set file access permissions for FILE to MODE.
282 If FILE is a symbolic link, this affects its target instead. */
283extern int chmod (const char *__file, __mode_t __mode)
284 __THROW __nonnull ((1));
285
286#ifdef __USE_MISC
287/* Set file access permissions for FILE to MODE.
288 If FILE is a symbolic link, this affects the link itself
289 rather than its target. */
290extern int lchmod (const char *__file, __mode_t __mode)
291 __THROW __nonnull ((1));
292#endif
293
294/* Set file access permissions of the file FD is open on to MODE. */
295#ifdef __USE_POSIX
296extern int fchmod (int __fd, __mode_t __mode) __THROW;
297#endif
298
299#ifdef __USE_ATFILE
300/* Set file access permissions of FILE relative to
301 the directory FD is open on. */
302extern int fchmodat (int __fd, const char *__file, __mode_t __mode,
303 int __flag)
304 __THROW __nonnull ((2)) __wur;
305#endif /* Use ATFILE. */
306
307
308
309/* Set the file creation mask of the current process to MASK,
310 and return the old creation mask. */
311extern __mode_t umask (__mode_t __mask) __THROW;
312
313#ifdef __USE_GNU
314/* Get the current `umask' value without changing it.
315 This function is only available under the GNU Hurd. */
316extern __mode_t getumask (void) __THROW;
317#endif
318
319/* Create a new directory named PATH, with permission bits MODE. */
320extern int mkdir (const char *__path, __mode_t __mode)
321 __THROW __nonnull ((1));
322
323#ifdef __USE_ATFILE
324/* Like mkdir, create a new directory with permission bits MODE. But
325 interpret relative PATH names relative to the directory associated
326 with FD. */
327extern int mkdirat (int __fd, const char *__path, __mode_t __mode)
328 __THROW __nonnull ((2));
329#endif
330
331/* Create a device file named PATH, with permission and special bits MODE
332 and device number DEV (which can be constructed from major and minor
333 device numbers with the `makedev' macro above). */
334#if defined __USE_MISC || defined __USE_XOPEN_EXTENDED
335extern int mknod (const char *__path, __mode_t __mode, __dev_t __dev)
336 __THROW __nonnull ((1));
337
338# ifdef __USE_ATFILE
339/* Like mknod, create a new device file with permission bits MODE and
340 device number DEV. But interpret relative PATH names relative to
341 the directory associated with FD. */
342extern int mknodat (int __fd, const char *__path, __mode_t __mode,
343 __dev_t __dev) __THROW __nonnull ((2));
344# endif
345#endif
346
347
348/* Create a new FIFO named PATH, with permission bits MODE. */
349extern int mkfifo (const char *__path, __mode_t __mode)
350 __THROW __nonnull ((1));
351
352#ifdef __USE_ATFILE
353/* Like mkfifo, create a new FIFO with permission bits MODE. But
354 interpret relative PATH names relative to the directory associated
355 with FD. */
356extern int mkfifoat (int __fd, const char *__path, __mode_t __mode)
357 __THROW __nonnull ((2));
358#endif
359
360#ifdef __USE_ATFILE
361/* Set file access and modification times relative to directory file
362 descriptor. */
363extern int utimensat (int __fd, const char *__path,
364 const struct timespec __times[2],
365 int __flags)
366 __THROW __nonnull ((2));
367#endif
368
369#ifdef __USE_XOPEN2K8
370/* Set file access and modification times of the file associated with FD. */
371extern int futimens (int __fd, const struct timespec __times[2]) __THROW;
372#endif
373
374/* To allow the `struct stat' structure and the file type `mode_t'
375 bits to vary without changing shared library major version number,
376 the `stat' family of functions and `mknod' are in fact inline
377 wrappers around calls to `xstat', `fxstat', `lxstat', and `xmknod',
378 which all take a leading version-number argument designating the
379 data structure and bits used. <bits/stat.h> defines _STAT_VER with
380 the version number corresponding to `struct stat' as defined in
381 that file; and _MKNOD_VER with the version number corresponding to
382 the S_IF* macros defined therein. It is arranged that when not
383 inlined these function are always statically linked; that way a
384 dynamically-linked executable always encodes the version number
385 corresponding to the data structures it uses, so the `x' functions
386 in the shared library can adapt without needing to recompile all
387 callers. */
388
389#ifndef _STAT_VER
390# define _STAT_VER 0
391#endif
392#ifndef _MKNOD_VER
393# define _MKNOD_VER 0
394#endif
395
396/* Wrappers for stat and mknod system calls. */
397#ifndef __USE_FILE_OFFSET64
398extern int __fxstat (int __ver, int __fildes, struct stat *__stat_buf)
399 __THROW __nonnull ((3));
400extern int __xstat (int __ver, const char *__filename,
401 struct stat *__stat_buf) __THROW __nonnull ((2, 3));
402extern int __lxstat (int __ver, const char *__filename,
403 struct stat *__stat_buf) __THROW __nonnull ((2, 3));
404extern int __fxstatat (int __ver, int __fildes, const char *__filename,
405 struct stat *__stat_buf, int __flag)
406 __THROW __nonnull ((3, 4));
407#else
408# ifdef __REDIRECT_NTH
409extern int __REDIRECT_NTH (__fxstat, (int __ver, int __fildes,
410 struct stat *__stat_buf), __fxstat64)
411 __nonnull ((3));
412extern int __REDIRECT_NTH (__xstat, (int __ver, const char *__filename,
413 struct stat *__stat_buf), __xstat64)
414 __nonnull ((2, 3));
415extern int __REDIRECT_NTH (__lxstat, (int __ver, const char *__filename,
416 struct stat *__stat_buf), __lxstat64)
417 __nonnull ((2, 3));
418extern int __REDIRECT_NTH (__fxstatat, (int __ver, int __fildes,
419 const char *__filename,
420 struct stat *__stat_buf, int __flag),
421 __fxstatat64) __nonnull ((3, 4));
422
423# else
424# define __fxstat __fxstat64
425# define __xstat __xstat64
426# define __lxstat __lxstat64
427# endif
428#endif
429
430#ifdef __USE_LARGEFILE64
431extern int __fxstat64 (int __ver, int __fildes, struct stat64 *__stat_buf)
432 __THROW __nonnull ((3));
433extern int __xstat64 (int __ver, const char *__filename,
434 struct stat64 *__stat_buf) __THROW __nonnull ((2, 3));
435extern int __lxstat64 (int __ver, const char *__filename,
436 struct stat64 *__stat_buf) __THROW __nonnull ((2, 3));
437extern int __fxstatat64 (int __ver, int __fildes, const char *__filename,
438 struct stat64 *__stat_buf, int __flag)
439 __THROW __nonnull ((3, 4));
440#endif
441extern int __xmknod (int __ver, const char *__path, __mode_t __mode,
442 __dev_t *__dev) __THROW __nonnull ((2, 4));
443
444extern int __xmknodat (int __ver, int __fd, const char *__path,
445 __mode_t __mode, __dev_t *__dev)
446 __THROW __nonnull ((3, 5));
447
448#ifdef __USE_EXTERN_INLINES
449/* Inlined versions of the real stat and mknod functions. */
450
451__extern_inline int
452__NTH (stat (const char *__path, struct stat *__statbuf))
453{
454 return __xstat (_STAT_VER, __path, __statbuf);
455}
456
457# if defined __USE_MISC || defined __USE_XOPEN_EXTENDED
458__extern_inline int
459__NTH (lstat (const char *__path, struct stat *__statbuf))
460{
461 return __lxstat (_STAT_VER, __path, __statbuf);
462}
463# endif
464
465__extern_inline int
466__NTH (fstat (int __fd, struct stat *__statbuf))
467{
468 return __fxstat (_STAT_VER, __fd, __statbuf);
469}
470
471# ifdef __USE_ATFILE
472__extern_inline int
473__NTH (fstatat (int __fd, const char *__filename, struct stat *__statbuf,
474 int __flag))
475{
476 return __fxstatat (_STAT_VER, __fd, __filename, __statbuf, __flag);
477}
478# endif
479
480# ifdef __USE_MISC
481__extern_inline int
482__NTH (mknod (const char *__path, __mode_t __mode, __dev_t __dev))
483{
484 return __xmknod (_MKNOD_VER, __path, __mode, &__dev);
485}
486# endif
487
488# ifdef __USE_ATFILE
489__extern_inline int
490__NTH (mknodat (int __fd, const char *__path, __mode_t __mode,
491 __dev_t __dev))
492{
493 return __xmknodat (_MKNOD_VER, __fd, __path, __mode, &__dev);
494}
495# endif
496
497# if defined __USE_LARGEFILE64 \
498 && (! defined __USE_FILE_OFFSET64 \
499 || (defined __REDIRECT_NTH && defined __OPTIMIZE__))
500__extern_inline int
501__NTH (stat64 (const char *__path, struct stat64 *__statbuf))
502{
503 return __xstat64 (_STAT_VER, __path, __statbuf);
504}
505
506# if defined __USE_MISC || defined __USE_XOPEN_EXTENDED
507__extern_inline int
508__NTH (lstat64 (const char *__path, struct stat64 *__statbuf))
509{
510 return __lxstat64 (_STAT_VER, __path, __statbuf);
511}
512# endif
513
514__extern_inline int
515__NTH (fstat64 (int __fd, struct stat64 *__statbuf))
516{
517 return __fxstat64 (_STAT_VER, __fd, __statbuf);
518}
519
520# ifdef __USE_ATFILE
521__extern_inline int
522__NTH (fstatat64 (int __fd, const char *__filename, struct stat64 *__statbuf,
523 int __flag))
524{
525 return __fxstatat64 (_STAT_VER, __fd, __filename, __statbuf, __flag);
526}
527# endif
528
529# endif
530
531#endif
532
533__END_DECLS
534
535
536#endif /* sys/stat.h */
537