src/system.h

   1 /* system-dependent definitions for fileutils, textutils, and sh-utils packages.
   2    Copyright (C) 1989, 1991-1999 Free Software Foundation, Inc.
   3
   4    This program is free software; you can redistribute it and/or modify
   5    it under the terms of the GNU General Public License as published by
   6    the Free Software Foundation; either version 2, or (at your option)
   7    any later version.
   8
   9    This program 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
  12    GNU General Public License for more details.
  13
  14    You should have received a copy of the GNU General Public License
  15    along with this program; if not, write to the Free Software Foundation,
  16    Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  17
  18 /* Include sys/types.h before this file.  */
  19
  20 #include <sys/stat.h>
  21
  22 #if STAT_MACROS_BROKEN
  23 # undef S_ISBLK
  24 # undef S_ISCHR
  25 # undef S_ISDIR
  26 # undef S_ISDOOR
  27 # undef S_ISFIFO
  28 # undef S_ISLNK
  29 # undef S_ISMPB
  30 # undef S_ISMPC
  31 # undef S_ISNWK
  32 # undef S_ISREG
  33 # undef S_ISSOCK
  34 #endif /* STAT_MACROS_BROKEN.  */
  35
  36 #ifndef S_IFMT
  37 # define S_IFMT 0170000
  38 #endif
  39 #if !defined(S_ISBLK) && defined(S_IFBLK)
  40 # define S_ISBLK(m) (((m) & S_IFMT) == S_IFBLK)
  41 #endif
  42 #if !defined(S_ISCHR) && defined(S_IFCHR)
  43 # define S_ISCHR(m) (((m) & S_IFMT) == S_IFCHR)
  44 #endif
  45 #if !defined(S_ISDIR) && defined(S_IFDIR)
  46 # define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR)
  47 #endif
  48 #if !defined(S_ISREG) && defined(S_IFREG)
  49 # define S_ISREG(m) (((m) & S_IFMT) == S_IFREG)
  50 #endif
  51 #if !defined(S_ISFIFO) && defined(S_IFIFO)
  52 # define S_ISFIFO(m) (((m) & S_IFMT) == S_IFIFO)
  53 #endif
  54 #if !defined(S_ISLNK) && defined(S_IFLNK)
  55 # define S_ISLNK(m) (((m) & S_IFMT) == S_IFLNK)
  56 #endif
  57 #if !defined(S_ISSOCK) && defined(S_IFSOCK)
  58 # define S_ISSOCK(m) (((m) & S_IFMT) == S_IFSOCK)
  59 #endif
  60 #if !defined(S_ISMPB) && defined(S_IFMPB) /* V7 */
  61 # define S_ISMPB(m) (((m) & S_IFMT) == S_IFMPB)
  62 # define S_ISMPC(m) (((m) & S_IFMT) == S_IFMPC)
  63 #endif
  64 #if !defined(S_ISNWK) && defined(S_IFNWK) /* HP/UX */
  65 # define S_ISNWK(m) (((m) & S_IFMT) == S_IFNWK)
  66 #endif
  67 #if !defined(S_ISDOOR) && defined(S_IFDOOR) /* Solaris 2.5 and up */
  68 # define S_ISDOOR(m) (((m) & S_IFMT) == S_IFDOOR)
  69 #endif
  70
  71 #if !S_ISUID
  72 # define S_ISUID 04000
  73 #endif
  74 #if !S_ISGID
  75 # define S_ISGID 02000
  76 #endif
  77
  78 /* S_ISVTX is a common extension to POSIX.1.  */
  79 #ifndef S_ISVTX
  80 # define S_ISVTX 01000
  81 #endif
  82
  83 #if !S_IWUSR
  84 # if S_IWRITE
  85 #  define S_IWUSR S_IWRITE
  86 # else
  87 #  define S_IWUSR 00200
  88 # endif
  89 #endif
  90
  91 #ifndef S_IWUSR
  92 # ifdef S_IWRITE
  93 #  define S_IWUSR S_IWRITE
  94 # else
  95 #  define S_IWUSR 00200
  96 # endif
  97 #endif
  98
  99 #ifndef S_IEXEC
 100 # define S_IEXEC S_IXUSR
 101 #endif
 102
 103 #ifndef S_IXUSR
 104 # define S_IXUSR S_IEXEC
 105 #endif
 106 #ifndef S_IXGRP
 107 # define S_IXGRP (S_IEXEC >> 3)
 108 #endif
 109 #ifndef S_IXOTH
 110 # define S_IXOTH (S_IEXEC >> 6)
 111 #endif
 112
 113 #ifndef S_IRWXU
 114 # define S_IRWXU (S_IRUSR | S_IWUSR | S_IXUSR)
 115 #endif
 116 #ifndef S_IRWXG
 117 # define S_IRWXG (S_IRGRP | S_IWGRP | S_IXGRP)
 118 #endif
 119 #ifndef S_IRWXO
 120 # define S_IRWXO (S_IROTH | S_IWOTH | S_IXOTH)
 121 #endif
 122
 123 /* S_IXUGO is a common extension to POSIX.1.  */
 124 #ifndef S_IXUGO
 125 # define S_IXUGO (S_IXUSR | S_IXGRP | S_IXOTH)
 126 #endif
 127
 128 /* All the mode bits that can be affected by chmod.  */
 129 #define CHMOD_MODE_BITS \
 130   (S_ISUID | S_ISGID | S_ISVTX | S_IRWXU | S_IRWXG | S_IRWXO)
 131
 132 #if ST_MTIM_NSEC
 133 # define ST_TIME_CMP_NS(a, b, ns) ((a).ns < (b).ns ? -1 : (a).ns > (b).ns)
 134 #else
 135 # define ST_TIME_CMP_NS(a, b, ns) 0
 136 #endif
 137 #define ST_TIME_CMP(a, b, s, ns) \
 138   ((a).s < (b).s ? -1 : (a).s > (b).s ? 1 : ST_TIME_CMP_NS(a, b, ns))
 139 #define ATIME_CMP(a, b) ST_TIME_CMP (a, b, st_atime, st_atim.ST_MTIM_NSEC)
 140 #define CTIME_CMP(a, b) ST_TIME_CMP (a, b, st_ctime, st_ctim.ST_MTIM_NSEC)
 141 #define MTIME_CMP(a, b) ST_TIME_CMP (a, b, st_mtime, st_mtim.ST_MTIM_NSEC)
 142
 143 #if !defined(HAVE_MKFIFO)
 144 # define mkfifo(path, mode) (mknod ((path), (mode) | S_IFIFO, 0))
 145 #endif
 146
 147 #if HAVE_SYS_PARAM_H
 148 # include <sys/param.h>
 149 #endif
 150
 151 /* <unistd.h> should be included before any preprocessor test
 152    of _POSIX_VERSION.  */
 153 #if HAVE_UNISTD_H
 154 # include <unistd.h>
 155 #endif
 156
 157 #ifndef STDIN_FILENO
 158 # define STDIN_FILENO 0
 159 #endif
 160
 161 #ifndef STDOUT_FILENO
 162 # define STDOUT_FILENO 1
 163 #endif
 164
 165 #ifndef STDERR_FILENO
 166 # define STDERR_FILENO 2
 167 #endif
 168
 169
 170 #if HAVE_LIMITS_H
 171 /* limits.h must come before pathmax.h because limits.h on some systems
 172    undefs PATH_MAX, whereas pathmax.h sets PATH_MAX.  */
 173 # include <limits.h>
 174 #endif
 175
 176 #include "pathmax.h"
 177
 178 #if TIME_WITH_SYS_TIME
 179 # include <sys/time.h>
 180 # include <time.h>
 181 #else
 182 # if HAVE_SYS_TIME_H
 183 #  include <sys/time.h>
 184 # else
 185 #  include <time.h>
 186 # endif
 187 #endif
 188
 189 /* Since major is a function on SVR4, we can't use `ifndef major'.  */
 190 #if MAJOR_IN_MKDEV
 191 # include <sys/mkdev.h>
 192 # define HAVE_MAJOR
 193 #endif
 194 #if MAJOR_IN_SYSMACROS
 195 # include <sys/sysmacros.h>
 196 # define HAVE_MAJOR
 197 #endif
 198 #ifdef major                    /* Might be defined in sys/types.h.  */
 199 # define HAVE_MAJOR
 200 #endif
 201
 202 #ifndef HAVE_MAJOR
 203 # define major(dev)  (((dev) >> 8) & 0xff)
 204 # define minor(dev)  ((dev) & 0xff)
 205 # define makedev(maj, min)  (((maj) << 8) | (min))
 206 #endif
 207 #undef HAVE_MAJOR
 208
 209 #if HAVE_UTIME_H
 210 # include <utime.h>
 211 #endif
 212
 213 /* Some systems (even some that do have <utime.h>) don't declare this
 214    structure anywhere.  */
 215 #ifndef HAVE_STRUCT_UTIMBUF
 216 struct utimbuf
 217 {
 218   long actime;
 219   long modtime;
 220 };
 221 #endif
 222
 223 /* Don't use bcopy!  Use memmove if source and destination may overlap,
 224    memcpy otherwise.  */
 225
 226 #if HAVE_STRING_H
 227 # if !STDC_HEADERS && HAVE_MEMORY_H
 228 #  include <memory.h>
 229 # endif
 230 # include <string.h>
 231 #else
 232 # include <strings.h>
 233 #endif
 234
 235 #include <errno.h>
 236 #ifndef errno
 237 extern int errno;
 238 #endif
 239
 240 #if HAVE_STDLIB_H
 241 # define getopt system_getopt
 242 # include <stdlib.h>
 243 # undef getopt
 244 #endif
 245
 246 /* The following test is to work around the gross typo in
 247    systems like Sony NEWS-OS Release 4.0C, whereby EXIT_FAILURE
 248    is defined to 0, not 1.  */
 249 #if !EXIT_FAILURE
 250 # undef EXIT_FAILURE
 251 # define EXIT_FAILURE 1
 252 #endif
 253
 254 #ifndef EXIT_SUCCESS
 255 # define EXIT_SUCCESS 0
 256 #endif
 257
 258 #if HAVE_FCNTL_H
 259 # include <fcntl.h>
 260 #else
 261 # include <sys/file.h>
 262 #endif
 263
 264 #if !defined (SEEK_SET)
 265 # define SEEK_SET 0
 266 # define SEEK_CUR 1
 267 # define SEEK_END 2
 268 #endif
 269 #ifndef F_OK
 270 # define F_OK 0
 271 # define X_OK 1
 272 # define W_OK 2
 273 # define R_OK 4
 274 #endif
 275
 276 #if HAVE_DIRENT_H
 277 # include <dirent.h>
 278 # define NLENGTH(direct) (strlen((direct)->d_name))
 279 #else /* not HAVE_DIRENT_H */
 280 # define dirent direct
 281 # define NLENGTH(direct) ((direct)->d_namlen)
 282 # if HAVE_SYS_NDIR_H
 283 #  include <sys/ndir.h>
 284 # endif /* HAVE_SYS_NDIR_H */
 285 # if HAVE_SYS_DIR_H
 286 #  include <sys/dir.h>
 287 # endif /* HAVE_SYS_DIR_H */
 288 # if HAVE_NDIR_H
 289 #  include <ndir.h>
 290 # endif /* HAVE_NDIR_H */
 291 #endif /* HAVE_DIRENT_H */
 292
 293 #if CLOSEDIR_VOID
 294 /* Fake a return value. */
 295 # define CLOSEDIR(d) (closedir (d), 0)
 296 #else
 297 # define CLOSEDIR(d) closedir (d)
 298 #endif
 299
 300 /* Get or fake the disk device blocksize.
 301    Usually defined by sys/param.h (if at all).  */
 302 #ifndef DEV_BSIZE
 303 # ifdef BSIZE
 304 #  define DEV_BSIZE BSIZE
 305 # else /* !BSIZE */
 306 #  define DEV_BSIZE 4096
 307 # endif /* !BSIZE */
 308 #endif /* !DEV_BSIZE */
 309
 310 /* Extract or fake data from a `struct stat'.
 311    ST_BLKSIZE: Preferred I/O blocksize for the file, in bytes.
 312    ST_NBLOCKS: Number of blocks in the file, including indirect blocks.
 313    ST_NBLOCKSIZE: Size of blocks used when calculating ST_NBLOCKS.  */
 314 #ifndef HAVE_STRUCT_STAT_ST_BLOCKS
 315 # define ST_BLKSIZE(statbuf) DEV_BSIZE
 316 # if defined(_POSIX_SOURCE) || !defined(BSIZE) /* fileblocks.c uses BSIZE.  */
 317 #  define ST_NBLOCKS(statbuf) ((statbuf).st_size / ST_NBLOCKSIZE + ((statbuf).st_size % ST_NBLOCKSIZE != 0))
 318 # else /* !_POSIX_SOURCE && BSIZE */
 319 #  define ST_NBLOCKS(statbuf) (st_blocks ((statbuf).st_size))
 320 # endif /* !_POSIX_SOURCE && BSIZE */
 321 #else /* HAVE_STRUCT_STAT_ST_BLOCKS */
 322 /* Some systems, like Sequents, return st_blksize of 0 on pipes. */
 323 # define ST_BLKSIZE(statbuf) ((statbuf).st_blksize > 0 \
 324                                ? (statbuf).st_blksize : DEV_BSIZE)
 325 # if defined(hpux) || defined(__hpux__) || defined(__hpux)
 326 /* HP-UX counts st_blocks in 1024-byte units.
 327    This loses when mixing HP-UX and BSD filesystems with NFS.  */
 328 #  define ST_NBLOCKSIZE 1024
 329 # else /* !hpux */
 330 #  if defined(_AIX) && defined(_I386)
 331 /* AIX PS/2 counts st_blocks in 4K units.  */
 332 #   define ST_NBLOCKSIZE (4 * 1024)
 333 #  else /* not AIX PS/2 */
 334 #   if defined(_CRAY)
 335 #    define ST_NBLOCKS(statbuf) ((statbuf).st_blocks * ST_BLKSIZE(statbuf)/ST_NBLOCKSIZE)
 336 #   endif /* _CRAY */
 337 #  endif /* not AIX PS/2 */
 338 # endif /* !hpux */
 339 #endif /* HAVE_STRUCT_STAT_ST_BLOCKS */
 340
 341 #ifndef ST_NBLOCKS
 342 # define ST_NBLOCKS(statbuf) ((statbuf).st_blocks)
 343 #endif
 344
 345 #ifndef ST_NBLOCKSIZE
 346 # define ST_NBLOCKSIZE 512
 347 #endif
 348
 349 #include "sys2.h"