src/system.h

   1 /* system-dependent definitions for fileutils, textutils, and sh-utils packages.
   2    Copyright (C) 1989, 1991-2002 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 #if 2 <= __GLIBC__ && 2 <= __GLIBC_MINOR__
  21 # if ! defined _SYS_TYPES_H
  22 you must include <sys/types.h> before including this file
  23 # endif
  24 #endif
  25
  26 #include <sys/stat.h>
  27
  28 #if !defined HAVE_MKFIFO
  29 # define mkfifo(path, mode) (mknod ((path), (mode) | S_IFIFO, 0))
  30 #endif
  31
  32 #if HAVE_SYS_PARAM_H
  33 # include <sys/param.h>
  34 #endif
  35
  36 /* <unistd.h> should be included before any preprocessor test
  37    of _POSIX_VERSION.  */
  38 #if HAVE_UNISTD_H
  39 # include <unistd.h>
  40 #endif
  41
  42 #ifndef STDIN_FILENO
  43 # define STDIN_FILENO 0
  44 #endif
  45
  46 #ifndef STDOUT_FILENO
  47 # define STDOUT_FILENO 1
  48 #endif
  49
  50 #ifndef STDERR_FILENO
  51 # define STDERR_FILENO 2
  52 #endif
  53
  54
  55 #if HAVE_LIMITS_H
  56 /* limits.h must come before pathmax.h because limits.h on some systems
  57    undefs PATH_MAX, whereas pathmax.h sets PATH_MAX.  */
  58 # include <limits.h>
  59 #endif
  60
  61 #include "pathmax.h"
  62
  63 #if TIME_WITH_SYS_TIME
  64 # include <sys/time.h>
  65 # include <time.h>
  66 #else
  67 # if HAVE_SYS_TIME_H
  68 #  include <sys/time.h>
  69 # else
  70 #  include <time.h>
  71 # endif
  72 #endif
  73
  74 /* Since major is a function on SVR4, we can't use `ifndef major'.  */
  75 #if MAJOR_IN_MKDEV
  76 # include <sys/mkdev.h>
  77 # define HAVE_MAJOR
  78 #endif
  79 #if MAJOR_IN_SYSMACROS
  80 # include <sys/sysmacros.h>
  81 # define HAVE_MAJOR
  82 #endif
  83 #ifdef major                    /* Might be defined in sys/types.h.  */
  84 # define HAVE_MAJOR
  85 #endif
  86
  87 #ifndef HAVE_MAJOR
  88 # define major(dev)  (((dev) >> 8) & 0xff)
  89 # define minor(dev)  ((dev) & 0xff)
  90 # define makedev(maj, min)  (((maj) << 8) | (min))
  91 #endif
  92 #undef HAVE_MAJOR
  93
  94 #if HAVE_UTIME_H
  95 # include <utime.h>
  96 #endif
  97
  98 /* Some systems (even some that do have <utime.h>) don't declare this
  99    structure anywhere.  */
 100 #ifndef HAVE_STRUCT_UTIMBUF
 101 struct utimbuf
 102 {
 103   long actime;
 104   long modtime;
 105 };
 106 #endif
 107
 108 /* Don't use bcopy!  Use memmove if source and destination may overlap,
 109    memcpy otherwise.  */
 110
 111 #if HAVE_STRING_H
 112 # if !STDC_HEADERS && HAVE_MEMORY_H
 113 #  include <memory.h>
 114 # endif
 115 # include <string.h>
 116 #else
 117 # include <strings.h>
 118 #endif
 119 #if ! HAVE_DECL_MEMRCHR
 120 void *memrchr (const void *, int, size_t);
 121 #endif
 122
 123 #include <errno.h>
 124 #ifndef errno
 125 extern int errno;
 126 #endif
 127
 128 #if HAVE_STDBOOL_H
 129 # include <stdbool.h>
 130 #else
 131 typedef enum {false = 0, true = 1} bool;
 132 #endif
 133
 134 #if HAVE_STDLIB_H
 135 # define getopt system_getopt
 136 # include <stdlib.h>
 137 # undef getopt
 138 #endif
 139
 140 /* The following test is to work around the gross typo in
 141    systems like Sony NEWS-OS Release 4.0C, whereby EXIT_FAILURE
 142    is defined to 0, not 1.  */
 143 #if !EXIT_FAILURE
 144 # undef EXIT_FAILURE
 145 # define EXIT_FAILURE 1
 146 #endif
 147
 148 #ifndef EXIT_SUCCESS
 149 # define EXIT_SUCCESS 0
 150 #endif
 151
 152 #if HAVE_FCNTL_H
 153 # include <fcntl.h>
 154 #else
 155 # include <sys/file.h>
 156 #endif
 157
 158 #if !defined SEEK_SET
 159 # define SEEK_SET 0
 160 # define SEEK_CUR 1
 161 # define SEEK_END 2
 162 #endif
 163 #ifndef F_OK
 164 # define F_OK 0
 165 # define X_OK 1
 166 # define W_OK 2
 167 # define R_OK 4
 168 #endif
 169
 170 /* For systems that distinguish between text and binary I/O.
 171    O_BINARY is usually declared in fcntl.h  */
 172 #if !defined O_BINARY && defined _O_BINARY
 173   /* For MSC-compatible compilers.  */
 174 # define O_BINARY _O_BINARY
 175 # define O_TEXT _O_TEXT
 176 #endif
 177
 178 #ifdef __BEOS__
 179   /* BeOS 5 has O_BINARY and O_TEXT, but they have no effect.  */
 180 # undef O_BINARY
 181 # undef O_TEXT
 182 #endif
 183
 184 #if O_BINARY
 185 # ifndef __DJGPP__
 186 #  define setmode _setmode
 187 #  define fileno(_fp) _fileno (_fp)
 188 # endif /* not DJGPP */
 189 # define SET_MODE(_f, _m) setmode (_f, _m)
 190 # define SET_BINARY(_f) do {if (!isatty(_f)) setmode (_f, O_BINARY);} while (0)
 191 # define SET_BINARY2(_f1, _f2)          \
 192   do {                                  \
 193     if (!isatty (_f1))                  \
 194       {                                 \
 195         setmode (_f1, O_BINARY);        \
 196         if (!isatty (_f2))              \
 197           setmode (_f2, O_BINARY);      \
 198       }                                 \
 199   } while(0)
 200 #else
 201 # define SET_MODE(_f, _m) (void)0
 202 # define SET_BINARY(f) (void)0
 203 # define SET_BINARY2(f1,f2) (void)0
 204 # define O_BINARY 0
 205 # define O_TEXT 0
 206 #endif /* O_BINARY */
 207
 208 #if HAVE_DIRENT_H
 209 # include <dirent.h>
 210 # define NLENGTH(direct) (strlen((direct)->d_name))
 211 #else /* not HAVE_DIRENT_H */
 212 # define dirent direct
 213 # define NLENGTH(direct) ((direct)->d_namlen)
 214 # if HAVE_SYS_NDIR_H
 215 #  include <sys/ndir.h>
 216 # endif /* HAVE_SYS_NDIR_H */
 217 # if HAVE_SYS_DIR_H
 218 #  include <sys/dir.h>
 219 # endif /* HAVE_SYS_DIR_H */
 220 # if HAVE_NDIR_H
 221 #  include <ndir.h>
 222 # endif /* HAVE_NDIR_H */
 223 #endif /* HAVE_DIRENT_H */
 224
 225 #if CLOSEDIR_VOID
 226 /* Fake a return value. */
 227 # define CLOSEDIR(d) (closedir (d), 0)
 228 #else
 229 # define CLOSEDIR(d) closedir (d)
 230 #endif
 231
 232 /* Get or fake the disk device blocksize.
 233    Usually defined by sys/param.h (if at all).  */
 234 #if !defined DEV_BSIZE && defined BSIZE
 235 # define DEV_BSIZE BSIZE
 236 #endif
 237 #if !defined DEV_BSIZE && defined BBSIZE /* SGI */
 238 # define DEV_BSIZE BBSIZE
 239 #endif
 240 #ifndef DEV_BSIZE
 241 # define DEV_BSIZE 4096
 242 #endif
 243
 244 /* Extract or fake data from a `struct stat'.
 245    ST_BLKSIZE: Preferred I/O blocksize for the file, in bytes.
 246    ST_NBLOCKS: Number of blocks in the file, including indirect blocks.
 247    ST_NBLOCKSIZE: Size of blocks used when calculating ST_NBLOCKS.  */
 248 #ifndef HAVE_STRUCT_STAT_ST_BLOCKS
 249 # define ST_BLKSIZE(statbuf) DEV_BSIZE
 250 # if defined _POSIX_SOURCE || !defined BSIZE /* fileblocks.c uses BSIZE.  */
 251 #  define ST_NBLOCKS(statbuf) \
 252   ((statbuf).st_size / ST_NBLOCKSIZE + ((statbuf).st_size % ST_NBLOCKSIZE != 0))
 253 # else /* !_POSIX_SOURCE && BSIZE */
 254 #  define ST_NBLOCKS(statbuf) \
 255   (S_ISREG ((statbuf).st_mode) \
 256    || S_ISDIR ((statbuf).st_mode) \
 257    ? st_blocks ((statbuf).st_size) : 0)
 258 # endif /* !_POSIX_SOURCE && BSIZE */
 259 #else /* HAVE_STRUCT_STAT_ST_BLOCKS */
 260 /* Some systems, like Sequents, return st_blksize of 0 on pipes.
 261    Also, when running `rsh hpux11-system cat any-file', cat would
 262    determine that the output stream had an st_blksize of 2147421096.
 263    So here we arbitrarily limit the `optimal' block size to 4MB.
 264    If anyone knows of a system for which the legitimate value for
 265    st_blksize can exceed 4MB, please report it as a bug in this code.  */
 266 # define ST_BLKSIZE(statbuf) ((0 < (statbuf).st_blksize \
 267                                && (statbuf).st_blksize <= (1 << 22)) /* 4MB */ \
 268                               ? (statbuf).st_blksize : DEV_BSIZE)
 269 # if defined hpux || defined __hpux__ || defined __hpux
 270 /* HP-UX counts st_blocks in 1024-byte units.
 271    This loses when mixing HP-UX and BSD filesystems with NFS.  */
 272 #  define ST_NBLOCKSIZE 1024
 273 # else /* !hpux */
 274 #  if defined _AIX && defined _I386
 275 /* AIX PS/2 counts st_blocks in 4K units.  */
 276 #   define ST_NBLOCKSIZE (4 * 1024)
 277 #  else /* not AIX PS/2 */
 278 #   if defined _CRAY
 279 #    define ST_NBLOCKS(statbuf) \
 280   (S_ISREG ((statbuf).st_mode) \
 281    || S_ISDIR ((statbuf).st_mode) \
 282    ? (statbuf).st_blocks * ST_BLKSIZE(statbuf)/ST_NBLOCKSIZE : 0)
 283 #   endif /* _CRAY */
 284 #  endif /* not AIX PS/2 */
 285 # endif /* !hpux */
 286 #endif /* HAVE_STRUCT_STAT_ST_BLOCKS */
 287
 288 #ifndef ST_NBLOCKS
 289 # define ST_NBLOCKS(statbuf) ((statbuf).st_blocks)
 290 #endif
 291
 292 #ifndef ST_NBLOCKSIZE
 293 # define ST_NBLOCKSIZE 512
 294 #endif
 295
 296 #include "sys2.h"