u-tools/apps/tar/lib/system.h

   1 /* System dependent definitions for GNU tar.
   2
   3    Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2003,
   4    2004, 2005, 2006, 2007 Free Software Foundation, Inc.
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 3, or (at your option)
   9    any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program; if not, write to the Free Software Foundation,
  18    Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
  19
  20 #if HAVE_CONFIG_H
  21 # include <config.h>
  22 #endif
  23
  24 #include <alloca.h>
  25
  26 #ifndef __attribute__
  27 /* This feature is available in gcc versions 2.5 and later.  */
  28 # if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 5) || __STRICT_ANSI__
  29 #  define __attribute__(spec) /* empty */
  30 # endif
  31 #endif
  32
  33 #include <sys/types.h>
  34 #include <ctype.h>
  35
  36 /* IN_CTYPE_DOMAIN (C) is nonzero if the unsigned char C can safely be given
  37    as an argument to <ctype.h> macros like `isspace'.  */
  38 #if STDC_HEADERS
  39 # define IN_CTYPE_DOMAIN(c) 1
  40 #else
  41 # define IN_CTYPE_DOMAIN(c) ((unsigned) (c) <= 0177)
  42 #endif
  43
  44 #define ISDIGIT(c) ((unsigned) (c) - '0' <= 9)
  45 #define ISODIGIT(c) ((unsigned) (c) - '0' <= 7)
  46 #define ISPRINT(c) (IN_CTYPE_DOMAIN (c) && isprint (c))
  47 #define ISSPACE(c) (IN_CTYPE_DOMAIN (c) && isspace (c))
  48
  49 /* Declare string and memory handling routines.  Take care that an ANSI
  50    string.h and pre-ANSI memory.h might conflict, and that memory.h and
  51    strings.h conflict on some systems.  */
  52
  53 #if STDC_HEADERS || HAVE_STRING_H
  54 # include <string.h>
  55 # if !STDC_HEADERS && HAVE_MEMORY_H
  56 #  include <memory.h>
  57 # endif
  58 #else
  59 # include <strings.h>
  60 # ifndef strchr
  61 #  define strchr index
  62 # endif
  63 # ifndef strrchr
  64 #  define strrchr rindex
  65 # endif
  66 # ifndef memcpy
  67 #  define memcpy(d, s, n) bcopy ((char const *) (s), (char *) (d), n)
  68 # endif
  69 # ifndef memcmp
  70 #  define memcmp(a, b, n) bcmp ((char const *) (a), (char const *) (b), n)
  71 # endif
  72 #endif
  73
  74 /* Declare errno.  */
  75
  76 #include <errno.h>
  77 #ifndef errno
  78 extern int errno;
  79 #endif
  80
  81 /* Declare open parameters.  */
  82
  83 #if HAVE_FCNTL_H
  84 # include <fcntl.h>
  85 #else
  86 # include <sys/file.h>
  87 #endif
  88                                 /* Pick only one of the next three: */
  89 #ifndef O_RDONLY
  90 # define O_RDONLY       0       /* only allow read */
  91 #endif
  92 #ifndef O_WRONLY
  93 # define O_WRONLY       1       /* only allow write */
  94 #endif
  95 #ifndef O_RDWR
  96 # define O_RDWR         2       /* both are allowed */
  97 #endif
  98 #ifndef O_ACCMODE
  99 # define O_ACCMODE (O_RDONLY | O_RDWR | O_WRONLY)
 100 #endif
 101                                 /* The rest can be OR-ed in to the above: */
 102 #ifndef O_CREAT
 103 # define O_CREAT        8       /* create file if needed */
 104 #endif
 105 #ifndef O_EXCL
 106 # define O_EXCL         16      /* file cannot already exist */
 107 #endif
 108 #ifndef O_TRUNC
 109 # define O_TRUNC        32      /* truncate file on open */
 110 #endif
 111
 112 #ifndef O_BINARY
 113 # define O_BINARY 0
 114 #endif
 115 #ifndef O_DIRECTORY
 116 # define O_DIRECTORY 0
 117 #endif
 118 #ifndef O_NOATIME
 119 # define O_NOATIME 0
 120 #endif
 121 #ifndef O_NONBLOCK
 122 # define O_NONBLOCK 0
 123 #endif
 124
 125 /* Declare file status routines and bits.  */
 126
 127 #include <sys/stat.h>
 128
 129 #if !HAVE_LSTAT && !defined lstat
 130 # define lstat stat
 131 #endif
 132
 133 #if STX_HIDDEN && !_LARGE_FILES /* AIX */
 134 # ifdef stat
 135 #  undef stat
 136 # endif
 137 # define stat(file_name, buf) statx (file_name, buf, STATSIZE, STX_HIDDEN)
 138 # ifdef lstat
 139 #  undef lstat
 140 # endif
 141 # define lstat(file_name, buf) statx (file_name, buf, STATSIZE, STX_HIDDEN | STX_LINK)
 142 #endif
 143
 144 #if STAT_MACROS_BROKEN
 145 # undef S_ISBLK
 146 # undef S_ISCHR
 147 # undef S_ISCTG
 148 # undef S_ISDIR
 149 # undef S_ISFIFO
 150 # undef S_ISLNK
 151 # undef S_ISREG
 152 # undef S_ISSOCK
 153 #endif
 154
 155 /* On MSDOS, there are missing things from <sys/stat.h>.  */
 156 #if MSDOS
 157 # define S_ISUID 0
 158 # define S_ISGID 0
 159 # define S_ISVTX 0
 160 #endif
 161
 162 #ifndef S_ISDIR
 163 # define S_ISDIR(mode) (((mode) & S_IFMT) == S_IFDIR)
 164 #endif
 165 #ifndef S_ISREG
 166 # define S_ISREG(mode) (((mode) & S_IFMT) == S_IFREG)
 167 #endif
 168
 169 #ifndef S_ISBLK
 170 # ifdef S_IFBLK
 171 #  define S_ISBLK(mode) (((mode) & S_IFMT) == S_IFBLK)
 172 # else
 173 #  define S_ISBLK(mode) 0
 174 # endif
 175 #endif
 176 #ifndef S_ISCHR
 177 # ifdef S_IFCHR
 178 #  define S_ISCHR(mode) (((mode) & S_IFMT) == S_IFCHR)
 179 # else
 180 #  define S_ISCHR(mode) 0
 181 # endif
 182 #endif
 183 #ifndef S_ISCTG
 184 # ifdef S_IFCTG
 185 #  define S_ISCTG(mode) (((mode) & S_IFMT) == S_IFCTG)
 186 # else
 187 #  define S_ISCTG(mode) 0
 188 # endif
 189 #endif
 190 #ifndef S_ISDOOR
 191 # define S_ISDOOR(mode) 0
 192 #endif
 193 #ifndef S_ISFIFO
 194 # ifdef S_IFIFO
 195 #  define S_ISFIFO(mode) (((mode) & S_IFMT) == S_IFIFO)
 196 # else
 197 #  define S_ISFIFO(mode) 0
 198 # endif
 199 #endif
 200 #ifndef S_ISLNK
 201 # ifdef S_IFLNK
 202 #  define S_ISLNK(mode) (((mode) & S_IFMT) == S_IFLNK)
 203 # else
 204 #  define S_ISLNK(mode) 0
 205 # endif
 206 #endif
 207 #ifndef S_ISSOCK
 208 # ifdef S_IFSOCK
 209 #  define S_ISSOCK(mode) (((mode) & S_IFMT) == S_IFSOCK)
 210 # else
 211 #  define S_ISSOCK(mode) 0
 212 # endif
 213 #endif
 214
 215 #if !HAVE_MKFIFO && !defined mkfifo && defined S_IFIFO
 216 # define mkfifo(file_name, mode) (mknod (file_name, (mode) | S_IFIFO, 0))
 217 #endif
 218
 219 #ifndef S_ISUID
 220 # define S_ISUID 0004000
 221 #endif
 222 #ifndef S_ISGID
 223 # define S_ISGID 0002000
 224 #endif
 225 #ifndef S_ISVTX
 226 # define S_ISVTX 0001000
 227 #endif
 228 #ifndef S_IRUSR
 229 # define S_IRUSR 0000400
 230 #endif
 231 #ifndef S_IWUSR
 232 # define S_IWUSR 0000200
 233 #endif
 234 #ifndef S_IXUSR
 235 # define S_IXUSR 0000100
 236 #endif
 237 #ifndef S_IRGRP
 238 # define S_IRGRP 0000040
 239 #endif
 240 #ifndef S_IWGRP
 241 # define S_IWGRP 0000020
 242 #endif
 243 #ifndef S_IXGRP
 244 # define S_IXGRP 0000010
 245 #endif
 246 #ifndef S_IROTH
 247 # define S_IROTH 0000004
 248 #endif
 249 #ifndef S_IWOTH
 250 # define S_IWOTH 0000002
 251 #endif
 252 #ifndef S_IXOTH
 253 # define S_IXOTH 0000001
 254 #endif
 255
 256 #define MODE_WXUSR      (S_IWUSR | S_IXUSR)
 257 #define MODE_R          (S_IRUSR | S_IRGRP | S_IROTH)
 258 #define MODE_RW         (S_IWUSR | S_IWGRP | S_IWOTH | MODE_R)
 259 #define MODE_RWX        (S_IXUSR | S_IXGRP | S_IXOTH | MODE_RW)
 260 #define MODE_ALL        (S_ISUID | S_ISGID | S_ISVTX | MODE_RWX)
 261
 262 /* Include <unistd.h> before any preprocessor test of _POSIX_VERSION.  */
 263 #include <unistd.h>
 264
 265 #ifndef SEEK_SET
 266 # define SEEK_SET 0
 267 #endif
 268 #ifndef SEEK_CUR
 269 # define SEEK_CUR 1
 270 #endif
 271 #ifndef SEEK_END
 272 # define SEEK_END 2
 273 #endif
 274
 275 #ifndef STDIN_FILENO
 276 # define STDIN_FILENO 0
 277 #endif
 278 #ifndef STDOUT_FILENO
 279 # define STDOUT_FILENO 1
 280 #endif
 281 #ifndef STDERR_FILENO
 282 # define STDERR_FILENO 2
 283 #endif
 284
 285 /* Declare make device, major and minor.  Since major is a function on
 286    SVR4, we have to resort to GOT_MAJOR instead of just testing if
 287    major is #define'd.  */
 288
 289 #if MAJOR_IN_MKDEV
 290 # include <sys/mkdev.h>
 291 # if !defined(makedev) && defined(mkdev)
 292 #  define makedev(a,b) mkdev((a),(b))
 293 # endif
 294 # define GOT_MAJOR
 295 #endif
 296
 297 #if MAJOR_IN_SYSMACROS
 298 # include <sys/sysmacros.h>
 299 # define GOT_MAJOR
 300 #endif
 301
 302 /* Some <sys/types.h> defines the macros. */
 303 #ifdef major
 304 # define GOT_MAJOR
 305 #endif
 306
 307 #ifndef GOT_MAJOR
 308 # if MSDOS
 309 #  define major(device)         (device)
 310 #  define minor(device)         (device)
 311 #  define makedev(major, minor) (((major) << 8) | (minor))
 312 #  define GOT_MAJOR
 313 # endif
 314 #endif
 315
 316 /* For HP-UX before HP-UX 8, major/minor are not in <sys/sysmacros.h>.  */
 317 #ifndef GOT_MAJOR
 318 # if defined(hpux) || defined(__hpux__) || defined(__hpux)
 319 #  include <sys/mknod.h>
 320 #  define GOT_MAJOR
 321 # endif
 322 #endif
 323
 324 #ifndef GOT_MAJOR
 325 # define major(device)          (((device) >> 8) & 0xff)
 326 # define minor(device)          ((device) & 0xff)
 327 # define makedev(major, minor)  (((major) << 8) | (minor))
 328 #endif
 329
 330 #undef GOT_MAJOR
 331
 332 /* Declare wait status.  */
 333
 334 #if HAVE_SYS_WAIT_H
 335 # include <sys/wait.h>
 336 #endif
 337 #ifndef WEXITSTATUS
 338 # define WEXITSTATUS(s) (((s) >> 8) & 0xff)
 339 #endif
 340 #ifndef WIFSIGNALED
 341 # define WIFSIGNALED(s) (((s) & 0xffff) - 1 < (unsigned) 0xff)
 342 #endif
 343 #ifndef WTERMSIG
 344 # define WTERMSIG(s)    ((s) & 0x7f)
 345 #endif
 346
 347 /* FIXME: It is wrong to use BLOCKSIZE for buffers when the logical block
 348    size is greater than 512 bytes; so ST_BLKSIZE code below, in preparation
 349    for some cleanup in this area, later.  */
 350
 351 /* Extract or fake data from a `struct stat'.  ST_BLKSIZE gives the
 352    optimal I/O blocksize for the file, in bytes.  Some systems, like
 353    Sequents, return st_blksize of 0 on pipes.  */
 354
 355 #define DEFAULT_ST_BLKSIZE 512
 356
 357 #if !HAVE_ST_BLKSIZE
 358 # define ST_BLKSIZE(statbuf) DEFAULT_ST_BLKSIZE
 359 #else
 360 # define ST_BLKSIZE(statbuf) \
 361     ((statbuf).st_blksize > 0 ? (statbuf).st_blksize : DEFAULT_ST_BLKSIZE)
 362 #endif
 363
 364 /* Extract or fake data from a `struct stat'.  ST_NBLOCKS gives the
 365    number of ST_NBLOCKSIZE-byte blocks in the file (including indirect blocks).
 366    HP-UX counts st_blocks in 1024-byte units,
 367    this loses when mixing HP-UX and BSD filesystems with NFS.  AIX PS/2
 368    counts st_blocks in 4K units.  */
 369
 370 #if !HAVE_ST_BLOCKS
 371 # if defined(_POSIX_SOURCE) || !defined(BSIZE)
 372 #  define ST_NBLOCKS(statbuf) ((statbuf).st_size / ST_NBLOCKSIZE + ((statbuf).st_size % ST_NBLOCKSIZE != 0))
 373 # else
 374    off_t st_blocks ();
 375 #  define ST_NBLOCKS(statbuf) (st_blocks ((statbuf).st_size))
 376 # endif
 377 #else
 378 # define ST_NBLOCKS(statbuf) ((statbuf).st_blocks)
 379 # if defined(hpux) || defined(__hpux__) || defined(__hpux)
 380 #  define ST_NBLOCKSIZE 1024
 381 # else
 382 #  if defined(_AIX) && defined(_I386)
 383 #   define ST_NBLOCKSIZE (4 * 1024)
 384 #  endif
 385 # endif
 386 #endif
 387
 388 #ifndef ST_NBLOCKSIZE
 389 # define ST_NBLOCKSIZE 512
 390 #endif
 391
 392 #define ST_IS_SPARSE(st)                                  \
 393   (ST_NBLOCKS (st)                                        \
 394     < ((st).st_size / ST_NBLOCKSIZE + ((st).st_size % ST_NBLOCKSIZE != 0)))
 395
 396 /* Declare standard functions.  */
 397
 398 #if STDC_HEADERS
 399 # include <stdlib.h>
 400 #else
 401 void *malloc ();
 402 char *getenv ();
 403 #endif
 404
 405 #include <stdbool.h>
 406 #include <stddef.h>
 407
 408 #include <stdio.h>
 409 #if !defined _POSIX_VERSION && MSDOS
 410 # include <io.h>
 411 #endif
 412
 413 #if WITH_DMALLOC
 414 # define DMALLOC_FUNC_CHECK
 415 # include <dmalloc.h>
 416 #endif
 417
 418 #include <limits.h>
 419
 420 #ifndef MB_LEN_MAX
 421 # define MB_LEN_MAX 1
 422 #endif
 423
 424 #include <inttypes.h>
 425
 426 #include <intprops.h>
 427
 428 #define UINTMAX_STRSIZE_BOUND INT_BUFSIZE_BOUND (uintmax_t)
 429 \f
 430 /* Prototypes for external functions.  */
 431
 432 #if HAVE_LOCALE_H
 433 # include <locale.h>
 434 #endif
 435 #if !HAVE_SETLOCALE
 436 # define setlocale(category, locale) /* empty */
 437 #endif
 438
 439 #include <time.h>
 440 #ifdef TIME_WITH_SYS_TIME
 441 # include <sys/time.h>
 442 #endif
 443
 444 /* Library modules.  */
 445
 446 #include <dirname.h>
 447 #include <error.h>
 448 #include <savedir.h>
 449 #include <unlocked-io.h>
 450 #include <xalloc.h>
 451
 452 #include <gettext.h>
 453 #define _(msgid) gettext (msgid)
 454 #define N_(msgid) msgid
 455
 456 #ifdef HAVE_PWD_H
 457 # include <pwd.h>
 458 #endif
 459 #ifdef HAVE_GRP_H
 460 # include <grp.h>
 461 #endif
 462
 463 #if MSDOS
 464 # include <process.h>
 465 # define SET_BINARY_MODE(arc) setmode(arc, O_BINARY)
 466 # define ERRNO_IS_EACCES errno == EACCES
 467 # define mkdir(file, mode) (mkdir) (file)
 468 # define TTY_NAME "con"
 469 # define sys_reset_uid_gid()
 470 #else
 471 # define SET_BINARY_MODE(arc)
 472 # define ERRNO_IS_EACCES 0
 473 # define TTY_NAME "/dev/tty"
 474 # define sys_reset_uid_gid() \
 475  do { setuid (getuid ()); setgid (getgid ()); } while (0)
 476 #endif
 477
 478 #if XENIX
 479 # include <sys/inode.h>
 480 #endif