Dogcows Code - chaz/tar/blob - src/system.h

   1 /* System dependent definitions for GNU tar.
   2    Copyright (C) 1994, 1995, 1996, 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
  19 #if HAVE_CONFIG_H
  20 # include <config.h>
  21 #endif
  22
  23 /* Declare alloca.  AIX requires this to be the first thing in the file.  */
  24
  25 #if __GNUC__
  26 # define alloca __builtin_alloca
  27 #else
  28 # if HAVE_ALLOCA_H
  29 #  include <alloca.h>
  30 # else
  31 #  ifdef _AIX
  32  #pragma alloca
  33 #  else
  34 #   ifndef alloca
  35 char *alloca ();
  36 #   endif
  37 #  endif
  38 # endif
  39 #endif
  40
  41 #include <sys/types.h>
  42
  43 /* Declare a generic pointer type.  */
  44 #if __STDC__ || defined(__TURBOC__)
  45 # define voidstar void *
  46 #else
  47 # define voidstar char *
  48 #endif
  49
  50 /* Declare ISASCII.  */
  51
  52 #include <ctype.h>
  53
  54 #if STDC_HEADERS
  55 # define ISASCII(Char) 1
  56 #else
  57 # ifdef isascii
  58 #  define ISASCII(Char) isascii (Char)
  59 # else
  60 #  if HAVE_ISASCII
  61 #   define ISASCII(Char) isascii (Char)
  62 #  else
  63 #   define ISASCII(Char) 1
  64 #  endif
  65 # endif
  66 #endif
  67
  68 /* Declare string and memory handling routines.  Take care that an ANSI
  69    string.h and pre-ANSI memory.h might conflict, and that memory.h and
  70    strings.h conflict on some systems.  */
  71
  72 #if STDC_HEADERS || HAVE_STRING_H
  73 # include <string.h>
  74 # if !STDC_HEADERS && HAVE_MEMORY_H
  75 #  include <memory.h>
  76 # endif
  77 #else
  78 # include <strings.h>
  79 # ifndef strchr
  80 #  define strchr index
  81 # endif
  82 # ifndef strrchr
  83 #  define strrchr rindex
  84 # endif
  85 # ifndef memcpy
  86 #  define memcpy(Dst, Src, Num) bcopy (Src, Dst, Num)
  87 # endif
  88 # ifndef memcmp
  89 #  define memcmp(Src1, Src2, Num) bcmp (Src1, Src2, Num)
  90 # endif
  91 #endif
  92
  93 /* Declare errno.  */
  94
  95 #include <errno.h>
  96 #ifndef errno
  97 extern int errno;
  98 #endif
  99
 100 /* Declare open parameters.  */
 101
 102 #if HAVE_FCNTL_H
 103 # include <fcntl.h>
 104 #else
 105 # include <sys/file.h>
 106 #endif
 107                                 /* Pick only one of the next three: */
 108 #ifndef O_RDONLY
 109 # define O_RDONLY       0       /* only allow read */
 110 #endif
 111 #ifndef O_WRONLY
 112 # define O_WRONLY       1       /* only allow write */
 113 #endif
 114 #ifndef O_RDWR
 115 # define O_RDWR         2       /* both are allowed */
 116 #endif
 117                                 /* The rest can be OR-ed in to the above: */
 118 #ifndef O_NDELAY
 119 # define O_NDELAY       4       /* don't block on opening devices */
 120 #endif
 121 #ifndef O_CREAT
 122 # define O_CREAT        8       /* create file if needed */
 123 #endif
 124 #ifndef O_EXCL
 125 # define O_EXCL         16      /* file cannot already exist */
 126 #endif
 127 #ifndef O_TRUNC
 128 # define O_TRUNC        32      /* truncate file on open */
 129 #endif
 130 #ifndef O_APPEND
 131 # define O_APPEND       64      /* always write at end of file */
 132 #endif
 133                                 /* MS-DOG forever, with my love! */
 134 #ifndef O_BINARY
 135 # define O_BINARY 0
 136 #endif
 137                                 /* Emulate System V 3-argument open call */
 138 #if EMUL_OPEN3
 139 # define open open3
 140 #endif
 141
 142 /* Declare file status routines and bits.  */
 143
 144 #include <sys/stat.h>
 145
 146 #ifndef S_ISLNK
 147 # define lstat stat
 148 #endif
 149
 150 #if STAT_MACROS_BROKEN
 151 # undef S_ISBLK
 152 # undef S_ISCHR
 153 # undef S_ISDIR
 154 # undef S_ISFIFO
 155 # undef S_ISLNK
 156 # undef S_ISMPB
 157 # undef S_ISMPC
 158 # undef S_ISNWK
 159 # undef S_ISREG
 160 # undef S_ISSOCK
 161 #endif
 162
 163 /* On MSDOS, there are missing things from <sys/stat.h>.  */
 164 #if MSDOS
 165 # define S_ISUID 0
 166 # define S_ISGID 0
 167 # define S_ISVTX 0
 168 #endif
 169
 170 #ifndef S_ISREG                 /* POSIX.1 stat stuff missing */
 171 # define mode_t unsigned short
 172 #endif
 173 #if !defined(S_ISBLK) && defined(S_IFBLK)
 174 # define S_ISBLK(Mode) (((Mode) & S_IFMT) == S_IFBLK)
 175 #endif
 176 #if !defined(S_ISCHR) && defined(S_IFCHR)
 177 # define S_ISCHR(Mode) (((Mode) & S_IFMT) == S_IFCHR)
 178 #endif
 179 #if !defined(S_ISDIR) && defined(S_IFDIR)
 180 # define S_ISDIR(Mode) (((Mode) & S_IFMT) == S_IFDIR)
 181 #endif
 182 #if !defined(S_ISREG) && defined(S_IFREG)
 183 # define S_ISREG(Mode) (((Mode) & S_IFMT) == S_IFREG)
 184 #endif
 185 #if !defined(S_ISFIFO) && defined(S_IFIFO)
 186 # define S_ISFIFO(Mode) (((Mode) & S_IFMT) == S_IFIFO)
 187 #endif
 188 #if !defined(S_ISLNK) && defined(S_IFLNK)
 189 # define S_ISLNK(Mode) (((Mode) & S_IFMT) == S_IFLNK)
 190 #endif
 191 #if !defined(S_ISSOCK) && defined(S_IFSOCK)
 192 # define S_ISSOCK(Mode) (((Mode) & S_IFMT) == S_IFSOCK)
 193 #endif
 194 #if !defined(S_ISMPB) && defined(S_IFMPB) /* V7 */
 195 # define S_ISMPB(Mode) (((Mode) & S_IFMT) == S_IFMPB)
 196 # define S_ISMPC(Mode) (((Mode) & S_IFMT) == S_IFMPC)
 197 #endif
 198 #if !defined(S_ISNWK) && defined(S_IFNWK) /* HP/UX */
 199 # define S_ISNWK(Mode) (((Mode) & S_IFMT) == S_IFNWK)
 200 #endif
 201
 202 #if !HAVE_MKFIFO
 203 # define mkfifo(Path, Mode) (mknod (Path, (Mode) | S_IFIFO, 0))
 204 #endif
 205
 206 #if !defined(S_ISCTG) && defined(S_IFCTG) /* contiguous file */
 207 # define S_ISCTG(Mode) (((Mode) & S_IFMT) == S_IFCTG)
 208 #endif
 209 #if !defined(S_ISVTX)
 210 # define S_ISVTX 0001000
 211 #endif
 212
 213 #ifndef _POSIX_SOURCE
 214 # include <sys/param.h>
 215 #endif
 216
 217 /* Include <unistd.h> before any preprocessor test of _POSIX_VERSION.  */
 218 #if HAVE_UNISTD_H
 219 # include <unistd.h>
 220 #endif
 221
 222 /* Declare make device, major and minor.  Since major is a function on
 223    SVR4, we have to resort to GOT_MAJOR instead of just testing if
 224    major is #define'd.  */
 225
 226 #if MAJOR_IN_MKDEV
 227 # include <sys/mkdev.h>
 228 # define GOT_MAJOR
 229 #endif
 230
 231 #if MAJOR_IN_SYSMACROS
 232 # include <sys/sysmacros.h>
 233 # define GOT_MAJOR
 234 #endif
 235
 236 /* Some <sys/types.h> defines the macros. */
 237 #ifdef major
 238 # define GOT_MAJOR
 239 #endif
 240
 241 #ifndef GOT_MAJOR
 242 # if MSDOS
 243 #  define major(Device)         (Device)
 244 #  define minor(Device)         (Device)
 245 #  define makedev(Major, Minor) (((Major) << 8) | (Minor))
 246 #  define GOT_MAJOR
 247 # endif
 248 #endif
 249
 250 /* For HP-UX before HP-UX 8, major/minor are not in <sys/sysmacros.h>.  */
 251 #ifndef GOT_MAJOR
 252 # if defined(hpux) || defined(__hpux__) || defined(__hpux)
 253 #  include <sys/mknod.h>
 254 #  define GOT_MAJOR
 255 # endif
 256 #endif
 257
 258 #ifndef GOT_MAJOR
 259 # define major(Device)          (((Device) >> 8) & 0xff)
 260 # define minor(Device)          ((Device) & 0xff)
 261 # define makedev(Major, Minor)  (((Major) << 8) | (Minor))
 262 #endif
 263
 264 #undef GOT_MAJOR
 265
 266 /* Declare directory reading routines and structures.  */
 267
 268 #if __TURBOC__
 269 # include "msd_dir.h"
 270 # define NAMLEN(dirent) ((dirent)->d_namlen)
 271 #else
 272 # if HAVE_DIRENT_H
 273 #  include <dirent.h>
 274 #  define NAMLEN(dirent) (strlen((dirent)->d_name))
 275 # else
 276 #  define dirent direct
 277 #  define NAMLEN(dirent) ((dirent)->d_namlen)
 278 #  if HAVE_SYS_NDIR_H
 279 #   include <sys/ndir.h>
 280 #  endif
 281 #  if HAVE_SYS_DIR_H
 282 #   include <sys/dir.h>
 283 #  endif
 284 #  if HAVE_NDIR_H
 285 #   include <ndir.h>
 286 #  endif
 287 # endif
 288 #endif
 289
 290 /* Declare wait status.  */
 291
 292 #if HAVE_SYS_WAIT_H
 293 # include <sys/wait.h>
 294 #endif
 295
 296 #if HAVE_UNION_WAIT
 297 # define WAIT_T union wait
 298 # ifndef WTERMSIG
 299 #  define WTERMSIG(Status)     ((Status).w_termsig)
 300 # endif
 301 # ifndef WCOREDUMP
 302 #  define WCOREDUMP(Status)    ((Status).w_coredump)
 303 # endif
 304 # ifndef WEXITSTATUS
 305 #  define WEXITSTATUS(Status)  ((Status).w_retcode)
 306 # endif
 307 #else
 308 # define WAIT_T int
 309 # ifndef WTERMSIG
 310 #  define WTERMSIG(Status)     ((Status) & 0x7f)
 311 # endif
 312 # ifndef WCOREDUMP
 313 #  define WCOREDUMP(Status)    ((Status) & 0x80)
 314 # endif
 315 # ifndef WEXITSTATUS
 316 #  define WEXITSTATUS(Status)  (((Status) >> 8) & 0xff)
 317 # endif
 318 #endif
 319
 320 #ifndef WIFSTOPPED
 321 # define WIFSTOPPED(Status)    (WTERMSIG(Status) == 0x7f)
 322 #endif
 323 #ifndef WIFSIGNALED
 324 # define WIFSIGNALED(Status)   (WTERMSIG(Status) != 0)
 325 #endif
 326 #ifndef WIFEXITED
 327 # define WIFEXITED(Status)     (WTERMSIG(Status) == 0)
 328 #endif
 329
 330 /* FIXME: It is wrong to use BLOCKSIZE for buffers when the logical block
 331    size is greater than 512 bytes; so ST_BLKSIZE code below, in preparation
 332    for some cleanup in this area, later.  */
 333
 334 /* Get or fake the disk device blocksize.  Usually defined by sys/param.h
 335    (if at all).  */
 336
 337 #if !defined(DEV_BSIZE) && defined(BSIZE)
 338 # define DEV_BSIZE BSIZE
 339 #endif
 340 #if !defined(DEV_BSIZE) && defined(BBSIZE) /* SGI */
 341 # define DEV_BSIZE BBSIZE
 342 #endif
 343 #ifndef DEV_BSIZE
 344 # define DEV_BSIZE 4096
 345 #endif
 346
 347 /* Extract or fake data from a `struct stat'.  ST_BLKSIZE gives the
 348    optimal I/O blocksize for the file, in bytes.  Some systems, like
 349    Sequents, return st_blksize of 0 on pipes.  */
 350
 351 #if !HAVE_ST_BLKSIZE
 352 # define ST_BLKSIZE(Statbuf) DEV_BSIZE
 353 #else
 354 # define ST_BLKSIZE(Statbuf) \
 355     ((Statbuf).st_blksize > 0 ? (Statbuf).st_blksize : DEV_BSIZE)
 356 #endif
 357
 358 /* Extract or fake data from a `struct stat'.  ST_NBLOCKS gives the
 359    number of 512-byte blocks in the file (including indirect blocks).
 360    fileblocks.c uses BSIZE.  HP-UX counts st_blocks in 1024-byte units,
 361    this loses when mixing HP-UX and BSD filesystems with NFS.  AIX PS/2
 362    counts st_blocks in 4K units.  */
 363
 364 #if !HAVE_ST_BLOCKS
 365 # if defined(_POSIX_SOURCE) || !defined(BSIZE)
 366 #  define ST_NBLOCKS(Statbuf) (((Statbuf).st_size + 512 - 1) / 512)
 367 # else
 368 #  define ST_NBLOCKS(Statbuf) (st_blocks ((Statbuf).st_size))
 369 # endif
 370 #else
 371 # if defined(hpux) || defined(__hpux__) || defined(__hpux)
 372 #  define ST_NBLOCKS(Statbuf) ((Statbuf).st_blocks * 2)
 373 # else
 374 #  if defined(_AIX) && defined(_I386)
 375 #   define ST_NBLOCKS(Statbuf) ((Statbuf).st_blocks * 8)
 376 #  else
 377 #   define ST_NBLOCKS(Statbuf) ((Statbuf).st_blocks)
 378 #  endif
 379 # endif
 380 #endif
 381
 382 /* This is a real challenge to properly get MTIO* symbols :-(.  ISC uses
 383    <sys/gentape.h>.  SCO and BSDi uses <sys/tape.h>; BSDi also requires
 384    <sys/tprintf.h> and <sys/device.h> for defining tp_dev and tpr_t.  It
 385    seems that the rest use <sys/mtio.h>, which itself requires other files,
 386    depending on systems.  Pyramid defines _IOW in <sgtty.h>, for example.  */
 387
 388 #if HAVE_SYS_GENTAPE_H
 389 # include <sys/gentape.h>
 390 #else
 391 # if HAVE_SYS_TAPE_H
 392 #  if HAVE_SYS_DEVICE_H
 393 #   include <sys/device.h>
 394 #  endif
 395 #  if HAVE_SYS_BUF_H
 396 #   include <sys/buf.h>
 397 #  endif
 398 #  if HAVE_SYS_TPRINTF_H
 399 #   include <sys/tprintf.h>
 400 #  endif
 401 #  include <sys/tape.h>
 402 # else
 403 #  if HAVE_SYS_MTIO_H
 404 #   include <sys/ioctl.h>
 405 #   if HAVE_SGTTY_H
 406 #    include <sgtty.h>
 407 #   endif
 408 #   if HAVE_SYS_IO_TRIOCTL_H
 409 #    include <sys/io/trioctl.h>
 410 #   endif
 411 #   include <sys/mtio.h>
 412 #  endif
 413 # endif
 414 #endif
 415
 416 /* Declare standard functions.  */
 417
 418 #if STDC_HEADERS
 419 # include <stdlib.h>
 420 #else
 421 voidstar malloc ();
 422 voidstar realloc ();
 423 # if HAVE_GETCWD
 424 char *getcwd ();
 425 # endif
 426 char *getenv ();
 427 #endif
 428
 429 #include <stdio.h>
 430
 431 #ifndef _POSIX_VERSION
 432 # if MSDOS
 433 #  include <io.h>
 434 # else
 435 off_t lseek ();
 436 # endif
 437 #endif
 438
 439 #include <pathmax.h>
 440
 441 #if WITH_DMALLOC
 442 # undef HAVE_VALLOC
 443 # define DMALLOC_FUNC_CHECK
 444 # include <dmalloc.h>
 445 #endif
 446 \f
 447 /* Prototypes for external functions.  */
 448
 449 #ifndef PARAMS
 450 # if PROTOTYPES
 451 #  define PARAMS(Args) Args
 452 # else
 453 #  define PARAMS(Args) ()
 454 # endif
 455 #endif
 456
 457 #if HAVE_LOCALE_H
 458 # include <locale.h>
 459 #endif
 460 #if !HAVE_SETLOCALE
 461 # define setlocale(Category, Locale)
 462 #endif
 463
 464 #if ENABLE_NLS
 465 # include <libintl.h>
 466 # define _(Text) gettext (Text)
 467 #else
 468 # define bindtextdomain(Domain, Directory)
 469 # define textdomain(Domain)
 470 # define _(Text) Text
 471 #endif
 472 #define N_(Text) Text
 473
 474 /* Library modules.  */
 475
 476 #include "error.h"
 477
 478 #if !HAVE_STRSTR
 479 char *strstr PARAMS ((const char *, const char *));
 480 #endif
 481
 482 #if HAVE_VALLOC
 483 # ifndef valloc
 484 voidstar valloc PARAMS ((size_t));
 485 # endif
 486 #else
 487 # define valloc(Size) malloc (Size)
 488 #endif
 489
 490 voidstar xmalloc PARAMS ((size_t));
 491 voidstar xrealloc PARAMS ((voidstar, size_t));
 492 char *xstrdup PARAMS ((const char *));