src/system.h

   1 /* system-dependent definitions for fileutils, textutils, and sh-utils packages.
   2    Copyright (C) 89, 91, 92, 93, 94, 96, 1997 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 #ifdef STAT_MACROS_BROKEN
  23 # undef S_ISBLK
  24 # undef S_ISCHR
  25 # undef S_ISDIR
  26 # undef S_ISFIFO
  27 # undef S_ISLNK
  28 # undef S_ISMPB
  29 # undef S_ISMPC
  30 # undef S_ISNWK
  31 # undef S_ISREG
  32 # undef S_ISSOCK
  33 #endif /* STAT_MACROS_BROKEN.  */
  34
  35 #ifndef S_IFMT
  36 # define S_IFMT 0170000
  37 #endif
  38 #if !defined(S_ISBLK) && defined(S_IFBLK)
  39 # define S_ISBLK(m) (((m) & S_IFMT) == S_IFBLK)
  40 #endif
  41 #if !defined(S_ISCHR) && defined(S_IFCHR)
  42 # define S_ISCHR(m) (((m) & S_IFMT) == S_IFCHR)
  43 #endif
  44 #if !defined(S_ISDIR) && defined(S_IFDIR)
  45 # define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR)
  46 #endif
  47 #if !defined(S_ISREG) && defined(S_IFREG)
  48 # define S_ISREG(m) (((m) & S_IFMT) == S_IFREG)
  49 #endif
  50 #if !defined(S_ISFIFO) && defined(S_IFIFO)
  51 # define S_ISFIFO(m) (((m) & S_IFMT) == S_IFIFO)
  52 #endif
  53 #if !defined(S_ISLNK) && defined(S_IFLNK)
  54 # define S_ISLNK(m) (((m) & S_IFMT) == S_IFLNK)
  55 #endif
  56 #if !defined(S_ISSOCK) && defined(S_IFSOCK)
  57 # define S_ISSOCK(m) (((m) & S_IFMT) == S_IFSOCK)
  58 #endif
  59 #if !defined(S_ISMPB) && defined(S_IFMPB) /* V7 */
  60 # define S_ISMPB(m) (((m) & S_IFMT) == S_IFMPB)
  61 # define S_ISMPC(m) (((m) & S_IFMT) == S_IFMPC)
  62 #endif
  63 #if !defined(S_ISNWK) && defined(S_IFNWK) /* HP/UX */
  64 # define S_ISNWK(m) (((m) & S_IFMT) == S_IFNWK)
  65 #endif
  66
  67 #ifndef S_IEXEC
  68 # define S_IEXEC S_IXUSR
  69 #endif
  70
  71 #ifndef S_IXUSR
  72 # define S_IXUSR S_IEXEC
  73 #endif
  74 #ifndef S_IXGRP
  75 # define S_IXGRP (S_IEXEC >> 3)
  76 #endif
  77 #ifndef S_IXOTH
  78 # define S_IXOTH (S_IEXEC >> 6)
  79 #endif
  80 #ifndef S_IXUGO
  81 # define S_IXUGO (S_IXUSR | S_IXGRP | S_IXOTH)
  82 #endif
  83
  84 #if !defined(HAVE_MKFIFO)
  85 # define mkfifo(path, mode) (mknod ((path), (mode) | S_IFIFO, 0))
  86 #endif
  87
  88 #ifdef HAVE_SYS_PARAM_H
  89 # include <sys/param.h>
  90 #endif
  91
  92 /* <unistd.h> should be included before any preprocessor test
  93    of _POSIX_VERSION.  */
  94 #ifdef HAVE_UNISTD_H
  95 # include <unistd.h>
  96 #endif
  97
  98 #ifndef STDIN_FILENO
  99 # define STDIN_FILENO 0
 100 #endif
 101
 102 #ifndef STDOUT_FILENO
 103 # define STDOUT_FILENO 1
 104 #endif
 105
 106 #ifndef STDERR_FILENO
 107 # define STDERR_FILENO 2
 108 #endif
 109
 110
 111 #if HAVE_LIMITS_H
 112 /* limits.h must come before pathmax.h because limits.h on some systems
 113    undefs PATH_MAX, whereas pathmax.h sets PATH_MAX.  */
 114 # include <limits.h>
 115 #endif
 116
 117 #ifndef CHAR_BIT
 118 # define CHAR_BIT 8
 119 #endif
 120
 121 /* The extra casts work around common compiler bugs.  */
 122 #define TYPE_SIGNED(t) (! ((t) 0 < (t) -1))
 123 #define TYPE_MINIMUM(t) (TYPE_SIGNED (t) ? ~ (t) 0 << (sizeof (t) * CHAR_BIT - 1) : (t) 0)
 124 #define TYPE_MAXIMUM(t) (~ (t) 0 - TYPE_MINIMUM (t))
 125
 126 #ifndef INT_MAX
 127 # define INT_MAX TYPE_MAXIMUM (int)
 128 #endif
 129
 130 #ifndef UINT_MAX
 131 # define UINT_MAX TYPE_MAXIMUM (unsigned int)
 132 #endif
 133
 134 #include "pathmax.h"
 135
 136 #ifdef TM_IN_SYS_TIME
 137 # include <sys/time.h>
 138 #else
 139 # include <time.h>
 140 #endif
 141
 142 /* Since major is a function on SVR4, we can't use `ifndef major'.  */
 143 #ifdef MAJOR_IN_MKDEV
 144 # include <sys/mkdev.h>
 145 # define HAVE_MAJOR
 146 #endif
 147 #ifdef MAJOR_IN_SYSMACROS
 148 # include <sys/sysmacros.h>
 149 # define HAVE_MAJOR
 150 #endif
 151 #ifdef major                    /* Might be defined in sys/types.h.  */
 152 # define HAVE_MAJOR
 153 #endif
 154
 155 #ifndef HAVE_MAJOR
 156 # define major(dev)  (((dev) >> 8) & 0xff)
 157 # define minor(dev)  ((dev) & 0xff)
 158 # define makedev(maj, min)  (((maj) << 8) | (min))
 159 #endif
 160 #undef HAVE_MAJOR
 161
 162 #ifdef HAVE_UTIME_H
 163 # include <utime.h>
 164 #endif
 165
 166 /* Some systems (even some that do have <utime.h>) don't declare this
 167    structure anywhere.  */
 168 #ifndef HAVE_STRUCT_UTIMBUF
 169 struct utimbuf
 170 {
 171   long actime;
 172   long modtime;
 173 };
 174 #endif
 175
 176 /* Don't use bcopy!  Use memmove if source and destination may overlap,
 177    memcpy otherwise.  */
 178
 179 #ifdef HAVE_STRING_H
 180 # if !STDC_HEADERS && HAVE_MEMORY_H
 181 #  include <memory.h>
 182 # endif
 183 # include <string.h>
 184 #else
 185 # include <strings.h>
 186 #endif
 187
 188 #include <errno.h>
 189 #ifndef errno
 190 extern int errno;
 191 #endif
 192
 193 #if HAVE_STDLIB_H
 194 # define getopt system_getopt
 195 # include <stdlib.h>
 196 # undef getopt
 197 #endif
 198
 199 /* The following test is to work around the gross typo in
 200    systems like Sony NEWS-OS Release 4.0C, whereby EXIT_FAILURE
 201    is defined to 0, not 1.  */
 202 #if !EXIT_FAILURE
 203 # undef EXIT_FAILURE
 204 # define EXIT_FAILURE 1
 205 #endif
 206
 207 #ifndef EXIT_SUCCESS
 208 # define EXIT_SUCCESS 0
 209 #endif
 210
 211 #ifdef HAVE_FCNTL_H
 212 # include <fcntl.h>
 213 #else
 214 # include <sys/file.h>
 215 #endif
 216
 217 #if !defined (SEEK_SET)
 218 # define SEEK_SET 0
 219 # define SEEK_CUR 1
 220 # define SEEK_END 2
 221 #endif
 222 #ifndef F_OK
 223 # define F_OK 0
 224 # define X_OK 1
 225 # define W_OK 2
 226 # define R_OK 4
 227 #endif
 228
 229 #ifdef HAVE_DIRENT_H
 230 # include <dirent.h>
 231 # define NLENGTH(direct) (strlen((direct)->d_name))
 232 #else /* not HAVE_DIRENT_H */
 233 # define dirent direct
 234 # define NLENGTH(direct) ((direct)->d_namlen)
 235 # ifdef HAVE_SYS_NDIR_H
 236 #  include <sys/ndir.h>
 237 # endif /* HAVE_SYS_NDIR_H */
 238 # ifdef HAVE_SYS_DIR_H
 239 #  include <sys/dir.h>
 240 # endif /* HAVE_SYS_DIR_H */
 241 # ifdef HAVE_NDIR_H
 242 #  include <ndir.h>
 243 # endif /* HAVE_NDIR_H */
 244 #endif /* HAVE_DIRENT_H */
 245
 246 #ifdef CLOSEDIR_VOID
 247 /* Fake a return value. */
 248 # define CLOSEDIR(d) (closedir (d), 0)
 249 #else
 250 # define CLOSEDIR(d) closedir (d)
 251 #endif
 252
 253 /* Get or fake the disk device blocksize.
 254    Usually defined by sys/param.h (if at all).  */
 255 #ifndef DEV_BSIZE
 256 # ifdef BSIZE
 257 #  define DEV_BSIZE BSIZE
 258 # else /* !BSIZE */
 259 #  define DEV_BSIZE 4096
 260 # endif /* !BSIZE */
 261 #endif /* !DEV_BSIZE */
 262
 263 /* Extract or fake data from a `struct stat'.
 264    ST_BLKSIZE: Preferred I/O blocksize for the file, in bytes.
 265    ST_NBLOCKS: Number of blocks in the file, including indirect blocks.
 266    ST_NBLOCKSIZE: Size of blocks used when calculating ST_NBLOCKS.  */
 267 #ifndef HAVE_ST_BLOCKS
 268 # define ST_BLKSIZE(statbuf) DEV_BSIZE
 269 # if defined(_POSIX_SOURCE) || !defined(BSIZE) /* fileblocks.c uses BSIZE.  */
 270 #  define ST_NBLOCKS(statbuf) ((statbuf).st_size / ST_NBLOCKSIZE + ((statbuf).st_size % ST_NBLOCKSIZE != 0))
 271 # else /* !_POSIX_SOURCE && BSIZE */
 272 #  define ST_NBLOCKS(statbuf) (st_blocks ((statbuf).st_size))
 273 # endif /* !_POSIX_SOURCE && BSIZE */
 274 #else /* HAVE_ST_BLOCKS */
 275 /* Some systems, like Sequents, return st_blksize of 0 on pipes. */
 276 # define ST_BLKSIZE(statbuf) ((statbuf).st_blksize > 0 \
 277                                ? (statbuf).st_blksize : DEV_BSIZE)
 278 # if defined(hpux) || defined(__hpux__) || defined(__hpux)
 279 /* HP-UX counts st_blocks in 1024-byte units.
 280    This loses when mixing HP-UX and BSD filesystems with NFS.  */
 281 #  define ST_NBLOCKSIZE 1024
 282 # else /* !hpux */
 283 #  if defined(_AIX) && defined(_I386)
 284 /* AIX PS/2 counts st_blocks in 4K units.  */
 285 #   define ST_NBLOCKSIZE (4 * 1024)
 286 #  else /* not AIX PS/2 */
 287 #   if defined(_CRAY)
 288 #    define ST_NBLOCKS(statbuf) ((statbuf).st_blocks * ST_BLKSIZE(statbuf)/ST_NBLOCKSIZE)
 289 #   endif /* _CRAY */
 290 #  endif /* not AIX PS/2 */
 291 # endif /* !hpux */
 292 #endif /* HAVE_ST_BLOCKS */
 293
 294 #ifndef ST_NBLOCKS
 295 # define ST_NBLOCKS(statbuf) ((statbuf).st_blocks)
 296 #endif
 297
 298 #ifndef ST_NBLOCKSIZE
 299 # define ST_NBLOCKSIZE 512
 300 #endif
 301
 302 #include "sys2.h"