io/sys/stat.h

   1 /* Copyright (C) 1991, 92, 95, 96, 97, 98 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 Library General Public License as
   6    published by the Free Software Foundation; either version 2 of the
   7    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    Library General Public License for more details.
  13
  14    You should have received a copy of the GNU Library General Public
  15    License along with the GNU C Library; see the file COPYING.LIB.  If not,
  16    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17    Boston, MA 02111-1307, USA.  */
  18
  19 /*
  20  *      POSIX Standard: 5.6 File Characteristics        <sys/stat.h>
  21  */
  22
  23 #ifndef _SYS_STAT_H
  24 #define _SYS_STAT_H     1
  25
  26 #include <features.h>
  27
  28 #include <bits/types.h>         /* For __mode_t and __dev_t.  */
  29
  30 #ifdef __USE_XOPEN
  31 # define __need_time_t
  32 # include <time.h>              /* For time_t.  */
  33
  34 /* The Single Unix specification says that some more types are
  35    available here.  */
  36 # ifndef dev_t
  37 typedef __dev_t dev_t;
  38 #  define dev_t dev_t
  39 # endif
  40
  41 # ifndef gid_t
  42 typedef __gid_t gid_t;
  43 #  define gid_t gid_t
  44 # endif
  45
  46 # ifndef ino_t
  47 #  ifndef __USE_FILE_OFFSET64
  48 typedef __ino_t ino_t;
  49 #  else
  50 typedef __ino64_t ino_t;
  51 #  endif
  52 #  define ino_t ino_t
  53 # endif
  54
  55 # ifndef mode_t
  56 typedef __mode_t mode_t;
  57 #  define mode_t mode_t
  58 # endif
  59
  60 # ifndef nlink_t
  61 typedef __nlink_t nlink_t;
  62 #  define nlink_t nlink_t
  63 # endif
  64
  65 # ifndef off_t
  66 #  ifndef __USE_FILE_OFFSET64
  67 typedef __off_t off_t;
  68 #  else
  69 typedef __off64_t off_t;
  70 #  endif
  71 #  define off_t off_t
  72 # endif
  73
  74 # ifndef uid_t
  75 typedef __uid_t uid_t;
  76 #  define uid_t uid_t
  77 # endif
  78 #endif  /* X/Open */
  79
  80 #ifdef __USE_UNIX98
  81 # ifndef pid_t
  82 typedef __pid_t pid_t;
  83 #  define pid_t pid_t
  84 # endif
  85 #endif  /* Unix98 */
  86
  87 __BEGIN_DECLS
  88
  89 #include <bits/stat.h>
  90
  91 #if defined __USE_BSD || defined __USE_MISC || defined __USE_XOPEN
  92 # define S_IFMT         __S_IFMT
  93 # define S_IFDIR        __S_IFDIR
  94 # define S_IFCHR        __S_IFCHR
  95 # define S_IFBLK        __S_IFBLK
  96 # define S_IFREG        __S_IFREG
  97 # ifdef __S_IFIFO
  98 #  define S_IFIFO       __S_IFIFO
  99 # endif
 100 # if defined __USE_BSD || defined __USE_MISC
 101 #  ifdef __S_IFLNK
 102 #   define S_IFLNK      __S_IFLNK
 103 #  endif
 104 #  ifdef __S_IFSOCK
 105 #   define S_IFSOCK     __S_IFSOCK
 106 #  endif
 107 # endif
 108 #endif
 109
 110 /* Test macros for file types.  */
 111
 112 #define __S_ISTYPE(mode, mask)  (((mode) & __S_IFMT) == (mask))
 113
 114 #define S_ISDIR(mode)    __S_ISTYPE((mode), __S_IFDIR)
 115 #define S_ISCHR(mode)    __S_ISTYPE((mode), __S_IFCHR)
 116 #define S_ISBLK(mode)    __S_ISTYPE((mode), __S_IFBLK)
 117 #define S_ISREG(mode)    __S_ISTYPE((mode), __S_IFREG)
 118 #ifdef __S_IFIFO
 119 # define S_ISFIFO(mode)  __S_ISTYPE((mode), __S_IFIFO)
 120 #endif
 121
 122 #ifdef  __USE_BSD
 123 # ifdef __S_IFLNK
 124 #  define S_ISLNK(mode)  __S_ISTYPE((mode), __S_IFLNK)
 125 # else
 126 #  define S_ISLNK(mode)  0
 127 # endif
 128 # ifdef __S_IFSOCK
 129 #  define S_ISSOCK(mode) __S_ISTYPE((mode), __S_IFSOCK)
 130 # endif
 131 #endif
 132
 133
 134 /* Protection bits.  */
 135
 136 #define S_ISUID __S_ISUID       /* Set user ID on execution.  */
 137 #define S_ISGID __S_ISGID       /* Set group ID on execution.  */
 138
 139 #if defined __USE_BSD || defined __USE_MISC
 140 /* Save swapped text after use (sticky bit).  This is pretty well obsolete.  */
 141 # define S_ISVTX        __S_ISVTX
 142 #endif
 143
 144 #define S_IRUSR __S_IREAD       /* Read by owner.  */
 145 #define S_IWUSR __S_IWRITE      /* Write by owner.  */
 146 #define S_IXUSR __S_IEXEC       /* Execute by owner.  */
 147 /* Read, write, and execute by owner.  */
 148 #define S_IRWXU (__S_IREAD|__S_IWRITE|__S_IEXEC)
 149
 150 #if defined __USE_MISC && defined __USE_BSD
 151 # define S_IREAD        S_IRUSR
 152 # define S_IWRITE       S_IWUSR
 153 # define S_IEXEC        S_IXUSR
 154 #endif
 155
 156 #define S_IRGRP (S_IRUSR >> 3)  /* Read by group.  */
 157 #define S_IWGRP (S_IWUSR >> 3)  /* Write by group.  */
 158 #define S_IXGRP (S_IXUSR >> 3)  /* Execute by group.  */
 159 /* Read, write, and execute by group.  */
 160 #define S_IRWXG (S_IRWXU >> 3)
 161
 162 #define S_IROTH (S_IRGRP >> 3)  /* Read by others.  */
 163 #define S_IWOTH (S_IWGRP >> 3)  /* Write by others.  */
 164 #define S_IXOTH (S_IXGRP >> 3)  /* Execute by others.  */
 165 /* Read, write, and execute by others.  */
 166 #define S_IRWXO (S_IRWXG >> 3)
 167
 168
 169 #ifdef  __USE_BSD
 170 /* Macros for common mode bit masks.  */
 171 # define ACCESSPERMS (S_IRWXU|S_IRWXG|S_IRWXO) /* 0777 */
 172 # define ALLPERMS (S_ISUID|S_ISGID|S_ISVTX|S_IRWXU|S_IRWXG|S_IRWXO)/* 07777 */
 173 # define DEFFILEMODE (S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH)/* 0666*/
 174
 175 # define S_BLKSIZE      512     /* Block size for `st_blocks'.  */
 176 #endif
 177
 178
 179 #ifndef __USE_FILE_OFFSET64
 180 /* Get file attributes for FILE and put them in BUF.  */
 181 extern int stat __P ((__const char *__file, struct stat *__buf));
 182
 183 /* Get file attributes for the file, device, pipe, or socket
 184    that file descriptor FD is open on and put them in BUF.  */
 185 extern int fstat __P ((int __fd, struct stat *__buf));
 186 #else
 187 # ifdef __REDIRECT
 188 extern int __REDIRECT (stat, __P ((__const char *__file, struct stat *__buf)),
 189                        stat64);
 190 extern int __REDIRECT (fstat, __P ((int __fd, struct stat *__buf)), fstat64);
 191 # else
 192 #  define stat stat64
 193 #  define fstat fstat64
 194 # endif
 195 #endif
 196 #ifdef __USE_LARGEFILE64
 197 extern int stat64 __P ((__const char *__file, struct stat64 *__buf));
 198 extern int fstat64 __P ((int __fd, struct stat64 *__buf));
 199 #endif
 200
 201 #if defined __USE_BSD || defined __USE_XOPEN_EXTENDED
 202 # ifndef __USE_FILE_OFFSET64
 203 /* Get file attributes about FILE and put them in BUF.
 204    If FILE is a symbolic link, do not follow it.  */
 205 extern int lstat __P ((__const char *__file, struct stat *__buf));
 206 # else
 207 #  ifdef __REDIRECT
 208 extern int __REDIRECT (lstat, __P ((__const char *__file, struct stat *__buf)),
 209                        lstat64);
 210 #  else
 211 #   define lstat lstat64
 212 #  endif
 213 # endif
 214 # ifdef __USE_LARGEFILE64
 215 extern int lstat64 __P ((__const char *__file, struct stat64 *__buf));
 216 # endif
 217 #endif
 218
 219 /* Set file access permissions for FILE to MODE.
 220    This takes an `int' MODE argument because that
 221    is what `mode_t's get widened to.  */
 222 extern int chmod __P ((__const char *__file, __mode_t __mode));
 223
 224 /* Set file access permissions of the file FD is open on to MODE.  */
 225 #if defined __USE_BSD || defined __USE_XOPEN_EXTENDED
 226 extern int fchmod __P ((int __fd, __mode_t __mode));
 227 #endif
 228
 229
 230 /* Set the file creation mask of the current process to MASK,
 231    and return the old creation mask.  */
 232 extern __mode_t umask __P ((__mode_t __mask));
 233
 234 #ifdef  __USE_GNU
 235 /* Get the current `umask' value without changing it.
 236    This function is only available under the GNU Hurd.  */
 237 extern __mode_t getumask __P ((void));
 238 #endif
 239
 240 /* Create a new directory named PATH, with permission bits MODE.  */
 241 extern int mkdir __P ((__const char *__path, __mode_t __mode));
 242
 243 /* Create a device file named PATH, with permission and special bits MODE
 244    and device number DEV (which can be constructed from major and minor
 245    device numbers with the `makedev' macro above).  */
 246 #if defined __USE_MISC || defined __USE_BSD || defined __USE_XOPEN_EXTENDED
 247 extern int mknod __P ((__const char *__path,
 248                        __mode_t __mode, __dev_t __dev));
 249 #endif
 250
 251
 252 /* Create a new FIFO named PATH, with permission bits MODE.  */
 253 extern int mkfifo __P ((__const char *__path, __mode_t __mode));
 254 \f
 255 /* To allow the `struct stat' structure and the file type `mode_t'
 256    bits to vary without changing shared library major version number,
 257    the `stat' family of functions and `mknod' are in fact inline
 258    wrappers around calls to `xstat', `fxstat', `lxstat', and `xmknod',
 259    which all take a leading version-number argument designating the
 260    data structure and bits used.  <bits/stat.h> defines _STAT_VER with
 261    the version number corresponding to `struct stat' as defined in
 262    that file; and _MKNOD_VER with the version number corresponding to
 263    the S_IF* macros defined therein.  It is arranged that when not
 264    inlined these function are always statically linked; that way a
 265    dynamically-linked executable always encodes the version number
 266    corresponding to the data structures it uses, so the `x' functions
 267    in the shared library can adapt without needing to recompile all
 268    callers.  */
 269
 270 #ifndef _STAT_VER
 271 # define _STAT_VER      0
 272 #endif
 273 #ifndef _MKNOD_VER
 274 # define _MKNOD_VER     0
 275 #endif
 276
 277 /* Wrappers for stat and mknod system calls.  */
 278 #ifndef __USE_FILE_OFFSET64
 279 extern int __fxstat __P ((int __ver, int __fildes,
 280                           struct stat *__stat_buf));
 281 extern int __xstat __P ((int __ver, __const char *__filename,
 282                          struct stat *__stat_buf));
 283 extern int __lxstat __P ((int __ver, __const char *__filename,
 284                           struct stat *__stat_buf));
 285 #else
 286 # ifdef __REDIRECT
 287 extern int __REDIRECT (__fxstat, __P ((int __ver, int __fildes,
 288                                        struct stat *__stat_buf)), __fxstat64);
 289 extern int __REDIRECT (__xstat, __P ((int __ver, __const char *__filename,
 290                                       struct stat *__stat_buf)), __xstat64);
 291 extern int __REDIRECT (__lxstat, __P ((int __ver, __const char *__filename,
 292                                        struct stat *__stat_buf)), __lxstat64);
 293
 294 # else
 295 #  define __fxstat __fxstat64
 296 #  define __xstat __xstat64
 297 #  define __lxstat __lxstat64
 298 # endif
 299 #endif
 300
 301 #ifdef __USE_LARGEFILE64
 302 extern int __fxstat64 __P ((int __ver, int __fildes,
 303                             struct stat64 *__stat_buf));
 304 extern int __xstat64 __P ((int __ver, __const char *__filename,
 305                            struct stat64 *__stat_buf));
 306 extern int __lxstat64 __P ((int __ver, __const char *__filename,
 307                             struct stat64 *__stat_buf));
 308 #endif
 309 extern int __xmknod __P ((int __ver, __const char *__path,
 310                           __mode_t __mode, __dev_t *__dev));
 311
 312 #if defined __GNUC__ && __GNUC__ >= 2
 313 /* Inlined versions of the real stat and mknod functions.  */
 314
 315 extern __inline__ int stat (__const char *__path, struct stat *__statbuf)
 316 {
 317   return __xstat (_STAT_VER, __path, __statbuf);
 318 }
 319
 320 # if defined __USE_BSD || defined __USE_XOPEN_EXTENDED
 321 extern __inline__ int lstat (__const char *__path, struct stat *__statbuf)
 322 {
 323   return __lxstat (_STAT_VER, __path, __statbuf);
 324 }
 325 # endif
 326
 327 extern __inline__ int fstat (int __fd, struct stat *__statbuf)
 328 {
 329   return __fxstat (_STAT_VER, __fd, __statbuf);
 330 }
 331
 332 # if defined __USE_MISC || defined __USE_BSD
 333 extern __inline__ int mknod (__const char *__path, __mode_t __mode,
 334                              __dev_t __dev)
 335 {
 336   return __xmknod (_MKNOD_VER, __path, __mode, &__dev);
 337 }
 338 # endif
 339
 340 # ifdef __USE_LARGEFILE64
 341 extern __inline__ int stat64 (__const char *__path, struct stat64 *__statbuf)
 342 {
 343   return __xstat64 (_STAT_VER, __path, __statbuf);
 344 }
 345
 346 #  if defined __USE_BSD || defined __USE_XOPEN_EXTENDED
 347 extern __inline__ int lstat64 (__const char *__path, struct stat64 *__statbuf)
 348 {
 349   return __lxstat64 (_STAT_VER, __path, __statbuf);
 350 }
 351 #  endif
 352
 353 extern __inline__ int fstat64 (int __fd, struct stat64 *__statbuf)
 354 {
 355   return __fxstat64 (_STAT_VER, __fd, __statbuf);
 356 }
 357 # endif
 358
 359 #endif
 360
 361 __END_DECLS
 362
 363
 364 #endif /* sys/stat.h  */