archival/bbunzip.c

   1 /* vi: set sw=4 ts=4: */
   2 /*
   3  * Common code for gunzip-like applets
   4  *
   5  * Licensed under GPLv2 or later, see file LICENSE in this source tree.
   6  */
   7 //kbuild:lib-$(CONFIG_ZCAT) += bbunzip.o
   8 //kbuild:lib-$(CONFIG_GUNZIP) += bbunzip.o
   9 //kbuild:lib-$(CONFIG_BZCAT) += bbunzip.o
  10 //kbuild:lib-$(CONFIG_BUNZIP2) += bbunzip.o
  11
  12 /* lzop_main() uses bbunpack(), need this: */
  13 //kbuild:lib-$(CONFIG_LZOP) += bbunzip.o
  14 //kbuild:lib-$(CONFIG_LZOPCAT) += bbunzip.o
  15 //kbuild:lib-$(CONFIG_UNLZOP) += bbunzip.o
  16 /* bzip2_main() too: */
  17 //kbuild:lib-$(CONFIG_BZIP2) += bbunzip.o
  18 /* gzip_main() too: */
  19 //kbuild:lib-$(CONFIG_GZIP) += bbunzip.o
  20
  21 #include "libbb.h"
  22 #include "bb_archive.h"
  23
  24 static
  25 int open_to_or_warn(int to_fd, const char *filename, int flags, int mode)
  26 {
  27         int fd = open3_or_warn(filename, flags, mode);
  28         if (fd < 0) {
  29                 return 1;
  30         }
  31         xmove_fd(fd, to_fd);
  32         return 0;
  33 }
  34
  35 char* FAST_FUNC append_ext(char *filename, const char *expected_ext)
  36 {
  37         return xasprintf("%s.%s", filename, expected_ext);
  38 }
  39
  40 int FAST_FUNC bbunpack(char **argv,
  41         IF_DESKTOP(long long) int FAST_FUNC (*unpacker)(transformer_state_t *xstate),
  42         char* FAST_FUNC (*make_new_name)(char *filename, const char *expected_ext),
  43         const char *expected_ext
  44 )
  45 {
  46         struct stat stat_buf;
  47         IF_DESKTOP(long long) int status = 0;
  48         char *filename, *new_name;
  49         smallint exitcode = 0;
  50         transformer_state_t xstate;
  51
  52         do {
  53                 /* NB: new_name is *maybe* malloc'ed! */
  54                 new_name = NULL;
  55                 filename = *argv; /* can be NULL - 'streaming' bunzip2 */
  56
  57                 if (filename && LONE_DASH(filename))
  58                         filename = NULL;
  59
  60                 /* Open src */
  61                 if (filename) {
  62                         if (!(option_mask32 & BBUNPK_SEAMLESS_MAGIC)) {
  63                                 if (stat(filename, &stat_buf) != 0) {
  64  err_name:
  65                                         bb_simple_perror_msg(filename);
  66  err:
  67                                         exitcode = 1;
  68                                         goto free_name;
  69                                 }
  70                                 if (open_to_or_warn(STDIN_FILENO, filename, O_RDONLY, 0))
  71                                         goto err;
  72                         } else {
  73                                 /* "clever zcat" with FILE */
  74                                 /* fail_if_not_compressed because zcat refuses uncompressed input */
  75                                 int fd = open_zipped(filename, /*fail_if_not_compressed:*/ 1);
  76                                 if (fd < 0)
  77                                         goto err_name;
  78                                 xmove_fd(fd, STDIN_FILENO);
  79                         }
  80                 } else
  81                 if (option_mask32 & BBUNPK_SEAMLESS_MAGIC) {
  82                         /* "clever zcat" on stdin */
  83                         if (setup_unzip_on_fd(STDIN_FILENO, /*fail_if_not_compressed*/ 1))
  84                                 goto err;
  85                 }
  86
  87                 /* Special cases: test, stdout */
  88                 if (option_mask32 & (BBUNPK_OPT_STDOUT|BBUNPK_OPT_TEST)) {
  89                         if (option_mask32 & BBUNPK_OPT_TEST)
  90                                 if (open_to_or_warn(STDOUT_FILENO, bb_dev_null, O_WRONLY, 0))
  91                                         xfunc_die();
  92                         filename = NULL;
  93                 }
  94
  95                 /* Open dst if we are going to unpack to file */
  96                 if (filename) {
  97                         new_name = make_new_name(filename, expected_ext);
  98                         if (!new_name) {
  99                                 bb_error_msg("%s: unknown suffix - ignored", filename);
 100                                 goto err;
 101                         }
 102
 103                         /* -f: overwrite existing output files */
 104                         if (option_mask32 & BBUNPK_OPT_FORCE) {
 105                                 unlink(new_name);
 106                         }
 107
 108                         /* O_EXCL: "real" bunzip2 doesn't overwrite files */
 109                         /* GNU gunzip does not bail out, but goes to next file */
 110                         if (open_to_or_warn(STDOUT_FILENO, new_name, O_WRONLY | O_CREAT | O_EXCL,
 111                                         stat_buf.st_mode))
 112                                 goto err;
 113                 }
 114
 115                 /* Check that the input is sane */
 116                 if (!(option_mask32 & BBUNPK_OPT_FORCE) && isatty(STDIN_FILENO)) {
 117                         bb_simple_error_msg_and_die("compressed data not read from terminal, "
 118                                         "use -f to force it");
 119                 }
 120
 121                 if (!(option_mask32 & BBUNPK_SEAMLESS_MAGIC)) {
 122                         init_transformer_state(&xstate);
 123                         /*xstate.signature_skipped = 0; - already is */
 124                         /*xstate.src_fd = STDIN_FILENO; - already is */
 125                         xstate.dst_fd = STDOUT_FILENO;
 126                         status = unpacker(&xstate);
 127                         if (status < 0)
 128                                 exitcode = 1;
 129                 } else {
 130                         if (bb_copyfd_eof(STDIN_FILENO, STDOUT_FILENO) < 0)
 131                                 /* Disk full, tty closed, etc. No point in continuing */
 132                                 xfunc_die();
 133                 }
 134
 135                 if (!(option_mask32 & BBUNPK_OPT_STDOUT))
 136                         xclose(STDOUT_FILENO); /* with error check! */
 137
 138                 if (filename) {
 139                         char *del = new_name;
 140
 141                         if (status >= 0) {
 142                                 unsigned new_name_len;
 143
 144                                 /* TODO: restore other things? */
 145                                 if (xstate.mtime != 0) {
 146                                         struct timeval times[2];
 147
 148                                         times[1].tv_sec = times[0].tv_sec = xstate.mtime;
 149                                         times[1].tv_usec = times[0].tv_usec = 0;
 150                                         /* Note: we closed it first.
 151                                          * On some systems calling utimes
 152                                          * then closing resets the mtime
 153                                          * back to current time. */
 154                                         utimes(new_name, times); /* ignoring errors */
 155                                 }
 156
 157                                 if (ENABLE_DESKTOP)
 158                                         new_name_len = strlen(new_name);
 159                                 /* Restore source filename (unless tgz -> tar case) */
 160                                 if (new_name == filename) {
 161                                         new_name_len = strlen(filename);
 162                                         filename[new_name_len] = '.';
 163                                 }
 164                                 /* Extreme bloat for gunzip compat */
 165                                 /* Some users do want this info... */
 166                                 if (ENABLE_DESKTOP && (option_mask32 & BBUNPK_OPT_VERBOSE)) {
 167                                         unsigned percent = status
 168                                                 ? ((uoff_t)stat_buf.st_size * 100u / (unsigned long long)status)
 169                                                 : 0;
 170                                         fprintf(stderr, "%s: %u%% - replaced with %.*s\n",
 171                                                 filename,
 172                                                 100u - percent,
 173                                                 new_name_len, new_name
 174                                         );
 175                                 }
 176                                 /* Delete _source_ file */
 177                                 del = filename;
 178                                 if (option_mask32 & BBUNPK_OPT_KEEP) /* ... unless -k */
 179                                         del = NULL;
 180                         }
 181                         if (del)
 182                                 xunlink(del);
 183  free_name:
 184                         if (new_name != filename)
 185                                 free(new_name);
 186                 }
 187         } while (*argv && *++argv);
 188
 189         if (option_mask32 & BBUNPK_OPT_STDOUT)
 190                 xclose(STDOUT_FILENO); /* with error check! */
 191
 192         return exitcode;
 193 }
 194
 195 #if ENABLE_UNCOMPRESS \
 196  || ENABLE_FEATURE_BZIP2_DECOMPRESS \
 197  || ENABLE_UNLZMA || ENABLE_LZCAT || ENABLE_LZMA \
 198  || ENABLE_UNXZ || ENABLE_XZCAT || ENABLE_XZ
 199 static
 200 char* FAST_FUNC make_new_name_generic(char *filename, const char *expected_ext)
 201 {
 202         char *extension = strrchr(filename, '.');
 203         if (!extension || strcmp(extension + 1, expected_ext) != 0) {
 204                 /* Mimic GNU gunzip - "real" bunzip2 tries to */
 205                 /* unpack file anyway, to file.out */
 206                 return NULL;
 207         }
 208         *extension = '\0';
 209         return filename;
 210 }
 211 #endif
 212
 213
 214 /*
 215  * Uncompress applet for busybox (c) 2002 Glenn McGrath
 216  *
 217  * Licensed under GPLv2 or later, see file LICENSE in this source tree.
 218  */
 219 //usage:#define uncompress_trivial_usage
 220 //usage:       "[-cf] [FILE]..."
 221 //usage:#define uncompress_full_usage "\n\n"
 222 //usage:       "Decompress .Z file[s]\n"
 223 //usage:     "\n        -c      Write to stdout"
 224 //usage:     "\n        -f      Overwrite"
 225
 226 //config:config UNCOMPRESS
 227 //config:       bool "uncompress (7.1 kb)"
 228 //config:       default n  # ancient
 229 //config:       help
 230 //config:       uncompress is used to decompress archives created by compress.
 231 //config:       Not much used anymore, replaced by gzip/gunzip.
 232
 233 //applet:IF_UNCOMPRESS(APPLET(uncompress, BB_DIR_BIN, BB_SUID_DROP))
 234 //kbuild:lib-$(CONFIG_UNCOMPRESS) += bbunzip.o
 235 #if ENABLE_UNCOMPRESS
 236 int uncompress_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
 237 int uncompress_main(int argc UNUSED_PARAM, char **argv)
 238 {
 239 // (N)compress 4.2.4.4:
 240 // -d If given, decompression is done instead
 241 // -c Write output on stdout, don't remove original
 242 // -b Parameter limits the max number of bits/code
 243 // -f Forces output file to be generated
 244 // -v Write compression statistics
 245 // -V Output vesion and compile options
 246 // -r Recursive. If a filename is a directory, descend into it and compress everything
 247         getopt32(argv, "cf");
 248
 249         argv += optind;
 250
 251         return bbunpack(argv, unpack_Z_stream, make_new_name_generic, "Z");
 252 }
 253 #endif
 254
 255
 256 /*
 257  * Gzip implementation for busybox
 258  *
 259  * Based on GNU gzip v1.2.4 Copyright (C) 1992-1993 Jean-loup Gailly.
 260  *
 261  * Originally adjusted for busybox by Sven Rudolph <sr1@inf.tu-dresden.de>
 262  * based on gzip sources
 263  *
 264  * Adjusted further by Erik Andersen <andersen@codepoet.org> to support files as
 265  * well as stdin/stdout, and to generally behave itself wrt command line
 266  * handling.
 267  *
 268  * General cleanup to better adhere to the style guide and make use of standard
 269  * busybox functions by Glenn McGrath
 270  *
 271  * Licensed under GPLv2 or later, see file LICENSE in this source tree.
 272  *
 273  * gzip (GNU zip) -- compress files with zip algorithm and 'compress' interface
 274  * Copyright (C) 1992-1993 Jean-loup Gailly
 275  * The unzip code was written and put in the public domain by Mark Adler.
 276  * Portions of the lzw code are derived from the public domain 'compress'
 277  * written by Spencer Thomas, Joe Orost, James Woods, Jim McKie, Steve Davies,
 278  * Ken Turkowski, Dave Mack and Peter Jannesen.
 279  */
 280 //usage:#define gunzip_trivial_usage
 281 //usage:       "[-cfkt] [FILE]..."
 282 //usage:#define gunzip_full_usage "\n\n"
 283 //usage:       "Decompress FILEs (or stdin)\n"
 284 //usage:     "\n        -c      Write to stdout"
 285 //usage:     "\n        -f      Force"
 286 //usage:     "\n        -k      Keep input files"
 287 //usage:     "\n        -t      Test file integrity"
 288 //usage:
 289 //usage:#define gunzip_example_usage
 290 //usage:       "$ ls -la /tmp/BusyBox*\n"
 291 //usage:       "-rw-rw-r--    1 andersen andersen   557009 Apr 11 10:55 /tmp/BusyBox-0.43.tar.gz\n"
 292 //usage:       "$ gunzip /tmp/BusyBox-0.43.tar.gz\n"
 293 //usage:       "$ ls -la /tmp/BusyBox*\n"
 294 //usage:       "-rw-rw-r--    1 andersen andersen  1761280 Apr 14 17:47 /tmp/BusyBox-0.43.tar\n"
 295 //usage:
 296 //usage:#define zcat_trivial_usage
 297 //usage:       "[FILE]..."
 298 //usage:#define zcat_full_usage "\n\n"
 299 //usage:       "Decompress to stdout"
 300
 301 //config:config GUNZIP
 302 //config:       bool "gunzip (11 kb)"
 303 //config:       default y
 304 //config:       select FEATURE_GZIP_DECOMPRESS
 305 //config:       help
 306 //config:       gunzip is used to decompress archives created by gzip.
 307 //config:       You can use the '-t' option to test the integrity of
 308 //config:       an archive, without decompressing it.
 309 //config:
 310 //config:config ZCAT
 311 //config:       bool "zcat (24 kb)"
 312 //config:       default y
 313 //config:       select FEATURE_GZIP_DECOMPRESS
 314 //config:       help
 315 //config:       Alias to "gunzip -c".
 316 //config:
 317 //config:config FEATURE_GUNZIP_LONG_OPTIONS
 318 //config:       bool "Enable long options"
 319 //config:       default y
 320 //config:       depends on (GUNZIP || ZCAT) && LONG_OPTS
 321
 322 //applet:IF_GUNZIP(APPLET(gunzip, BB_DIR_BIN, BB_SUID_DROP))
 323 //               APPLET_ODDNAME:name  main    location    suid_type     help
 324 //applet:IF_ZCAT(APPLET_ODDNAME(zcat, gunzip, BB_DIR_BIN, BB_SUID_DROP, zcat))
 325 #if ENABLE_FEATURE_GZIP_DECOMPRESS
 326 static
 327 char* FAST_FUNC make_new_name_gunzip(char *filename, const char *expected_ext UNUSED_PARAM)
 328 {
 329         char *extension = strrchr(filename, '.');
 330
 331         if (!extension)
 332                 return NULL;
 333
 334         extension++;
 335         if (strcmp(extension, "tgz" + 1) == 0
 336 #if ENABLE_FEATURE_SEAMLESS_Z
 337          || (extension[0] == 'Z' && extension[1] == '\0')
 338 #endif
 339         ) {
 340                 extension[-1] = '\0';
 341         } else if (strcmp(extension, "tgz") == 0) {
 342                 filename = xstrdup(filename);
 343                 extension = strrchr(filename, '.');
 344                 extension[2] = 'a';
 345                 extension[3] = 'r';
 346         } else {
 347                 return NULL;
 348         }
 349         return filename;
 350 }
 351
 352 #if ENABLE_FEATURE_GUNZIP_LONG_OPTIONS
 353 static const char gunzip_longopts[] ALIGN1 =
 354         "stdout\0"              No_argument       "c"
 355         "to-stdout\0"           No_argument       "c"
 356         "force\0"               No_argument       "f"
 357         "test\0"                No_argument       "t"
 358         "no-name\0"             No_argument       "n"
 359         ;
 360 #endif
 361
 362 /*
 363  * Linux kernel build uses gzip -d -n. We accept and ignore it.
 364  * Man page says:
 365  * -n --no-name
 366  * gzip: do not save the original file name and time stamp.
 367  * (The original name is always saved if the name had to be truncated.)
 368  * gunzip: do not restore the original file name/time even if present
 369  * (remove only the gzip suffix from the compressed file name).
 370  * This option is the default when decompressing.
 371  * -N --name
 372  * gzip: always save the original file name and time stamp (this is the default)
 373  * gunzip: restore the original file name and time stamp if present.
 374  */
 375 int gunzip_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
 376 int gunzip_main(int argc UNUSED_PARAM, char **argv)
 377 {
 378 #if ENABLE_FEATURE_GUNZIP_LONG_OPTIONS
 379         getopt32long(argv, BBUNPK_OPTSTR "dtn", gunzip_longopts);
 380 #else
 381         getopt32(argv, BBUNPK_OPTSTR "dtn");
 382 #endif
 383         argv += optind;
 384
 385         /* If called as zcat...
 386          * Normally, "zcat" is just "gunzip -c".
 387          * But if seamless magic is enabled, then we are much more clever.
 388          */
 389         if (ENABLE_ZCAT && (!ENABLE_GUNZIP || applet_name[1] == 'c'))
 390                 option_mask32 |= BBUNPK_OPT_STDOUT | BBUNPK_SEAMLESS_MAGIC;
 391
 392         return bbunpack(argv, unpack_gz_stream, make_new_name_gunzip, /*unused:*/ NULL);
 393 }
 394 #endif /* FEATURE_GZIP_DECOMPRESS */
 395
 396
 397 /*
 398  * Modified for busybox by Glenn McGrath
 399  * Added support output to stdout by Thomas Lundquist <thomasez@zelow.no>
 400  *
 401  * Licensed under GPLv2 or later, see file LICENSE in this source tree.
 402  */
 403 //usage:#define bunzip2_trivial_usage
 404 //usage:       "[-cfk] [FILE]..."
 405 //usage:#define bunzip2_full_usage "\n\n"
 406 //usage:       "Decompress FILEs (or stdin)\n"
 407 //usage:     "\n        -c      Write to stdout"
 408 //usage:     "\n        -f      Force"
 409 //usage:     "\n        -k      Keep input files"
 410 //usage:#define bzcat_trivial_usage
 411 //usage:       "[FILE]..."
 412 //usage:#define bzcat_full_usage "\n\n"
 413 //usage:       "Decompress to stdout"
 414
 415 //config:config BUNZIP2
 416 //config:       bool "bunzip2 (8.7 kb)"
 417 //config:       default y
 418 //config:       select FEATURE_BZIP2_DECOMPRESS
 419 //config:       help
 420 //config:       bunzip2 is a compression utility using the Burrows-Wheeler block
 421 //config:       sorting text compression algorithm, and Huffman coding. Compression
 422 //config:       is generally considerably better than that achieved by more
 423 //config:       conventional LZ77/LZ78-based compressors, and approaches the
 424 //config:       performance of the PPM family of statistical compressors.
 425 //config:
 426 //config:       Unless you have a specific application which requires bunzip2, you
 427 //config:       should probably say N here.
 428 //config:
 429 //config:config BZCAT
 430 //config:       bool "bzcat (8.7 kb)"
 431 //config:       default y
 432 //config:       select FEATURE_BZIP2_DECOMPRESS
 433 //config:       help
 434 //config:       Alias to "bunzip2 -c".
 435
 436 //applet:IF_BUNZIP2(APPLET(bunzip2, BB_DIR_USR_BIN, BB_SUID_DROP))
 437 //                APPLET_ODDNAME:name   main     location        suid_type     help
 438 //applet:IF_BZCAT(APPLET_ODDNAME(bzcat, bunzip2, BB_DIR_USR_BIN, BB_SUID_DROP, bzcat))
 439 #if ENABLE_FEATURE_BZIP2_DECOMPRESS || ENABLE_BUNZIP2 || ENABLE_BZCAT
 440 int bunzip2_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
 441 int bunzip2_main(int argc UNUSED_PARAM, char **argv)
 442 {
 443         getopt32(argv, BBUNPK_OPTSTR "dt");
 444         argv += optind;
 445         if (ENABLE_BZCAT && (!ENABLE_BUNZIP2 || applet_name[2] == 'c')) /* bzcat */
 446                 option_mask32 |= BBUNPK_OPT_STDOUT;
 447
 448         return bbunpack(argv, unpack_bz2_stream, make_new_name_generic, "bz2");
 449 }
 450 #endif
 451
 452
 453 /*
 454  * Small lzma deflate implementation.
 455  * Copyright (C) 2006  Aurelien Jacobs <aurel@gnuage.org>
 456  *
 457  * Based on bunzip.c from busybox
 458  *
 459  * Licensed under GPLv2, see file LICENSE in this source tree.
 460  */
 461 //usage:#define unlzma_trivial_usage
 462 //usage:       "[-cfk] [FILE]..."
 463 //usage:#define unlzma_full_usage "\n\n"
 464 //usage:       "Decompress FILE (or stdin)\n"
 465 //usage:     "\n        -c      Write to stdout"
 466 //usage:     "\n        -f      Force"
 467 //usage:     "\n        -k      Keep input files"
 468 //usage:
 469 //usage:#define lzma_trivial_usage
 470 //usage:       "-d [-cfk] [FILE]..."
 471 //usage:#define lzma_full_usage "\n\n"
 472 //usage:       "Decompress FILE (or stdin)\n"
 473 //usage:     "\n        -d      Decompress"
 474 //usage:     "\n        -c      Write to stdout"
 475 //usage:     "\n        -f      Force"
 476 //usage:     "\n        -k      Keep input files"
 477 //usage:
 478 //usage:#define lzcat_trivial_usage
 479 //usage:       "[FILE]..."
 480 //usage:#define lzcat_full_usage "\n\n"
 481 //usage:       "Decompress to stdout"
 482
 483 //config:config UNLZMA
 484 //config:       bool "unlzma (7.5 kb)"
 485 //config:       default y
 486 //config:       help
 487 //config:       unlzma is a compression utility using the Lempel-Ziv-Markov chain
 488 //config:       compression algorithm, and range coding. Compression
 489 //config:       is generally considerably better than that achieved by the bzip2
 490 //config:       compressors.
 491 //config:
 492 //config:config LZCAT
 493 //config:       bool "lzcat (7.5 kb)"
 494 //config:       default y
 495 //config:       help
 496 //config:       Alias to "unlzma -c".
 497 //config:
 498 //config:config LZMA
 499 //config:       bool "lzma -d"
 500 //config:       default y
 501 //config:       help
 502 //config:       Enable this option if you want commands like "lzma -d" to work.
 503 //config:       IOW: you'll get lzma applet, but it will always require -d option.
 504
 505 //applet:IF_UNLZMA(APPLET(unlzma, BB_DIR_USR_BIN, BB_SUID_DROP))
 506 //                APPLET_ODDNAME:name   main    location        suid_type     help
 507 //applet:IF_LZCAT(APPLET_ODDNAME(lzcat, unlzma, BB_DIR_USR_BIN, BB_SUID_DROP, lzcat))
 508 //applet:IF_LZMA( APPLET_ODDNAME(lzma,  unlzma, BB_DIR_USR_BIN, BB_SUID_DROP, lzma))
 509 //kbuild:lib-$(CONFIG_UNLZMA) += bbunzip.o
 510 //kbuild:lib-$(CONFIG_LZCAT) += bbunzip.o
 511 //kbuild:lib-$(CONFIG_LZMA) += bbunzip.o
 512 #if ENABLE_UNLZMA || ENABLE_LZCAT || ENABLE_LZMA
 513 int unlzma_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
 514 int unlzma_main(int argc UNUSED_PARAM, char **argv)
 515 {
 516         IF_LZMA(int opts =) getopt32(argv, BBUNPK_OPTSTR "dt");
 517 # if ENABLE_LZMA
 518         /* lzma without -d or -t? */
 519         if (applet_name[2] == 'm' && !(opts & (BBUNPK_OPT_DECOMPRESS|BBUNPK_OPT_TEST)))
 520                 bb_show_usage();
 521 # endif
 522         /* lzcat? */
 523         if (ENABLE_LZCAT && applet_name[2] == 'c')
 524                 option_mask32 |= BBUNPK_OPT_STDOUT;
 525
 526         argv += optind;
 527         return bbunpack(argv, unpack_lzma_stream, make_new_name_generic, "lzma");
 528 }
 529 #endif
 530
 531
 532 //usage:#define unxz_trivial_usage
 533 //usage:       "[-cfk] [FILE]..."
 534 //usage:#define unxz_full_usage "\n\n"
 535 //usage:       "Decompress FILE (or stdin)\n"
 536 //usage:     "\n        -c      Write to stdout"
 537 //usage:     "\n        -f      Force"
 538 //usage:     "\n        -k      Keep input files"
 539 //usage:     "\n        -t      Test file integrity"
 540 //usage:
 541 //usage:#define xz_trivial_usage
 542 //usage:       "-d [-cfk] [FILE]..."
 543 //usage:#define xz_full_usage "\n\n"
 544 //usage:       "Decompress FILE (or stdin)\n"
 545 //usage:     "\n        -d      Decompress"
 546 //usage:     "\n        -c      Write to stdout"
 547 //usage:     "\n        -f      Force"
 548 //usage:     "\n        -k      Keep input files"
 549 //usage:     "\n        -t      Test file integrity"
 550 //usage:
 551 //usage:#define xzcat_trivial_usage
 552 //usage:       "[FILE]..."
 553 //usage:#define xzcat_full_usage "\n\n"
 554 //usage:       "Decompress to stdout"
 555
 556 //config:config UNXZ
 557 //config:       bool "unxz (13 kb)"
 558 //config:       default y
 559 //config:       help
 560 //config:       unxz is a unlzma successor.
 561 //config:
 562 //config:config XZCAT
 563 //config:       bool "xzcat (13 kb)"
 564 //config:       default y
 565 //config:       help
 566 //config:       Alias to "unxz -c".
 567 //config:
 568 //config:config XZ
 569 //config:       bool "xz -d"
 570 //config:       default y
 571 //config:       help
 572 //config:       Enable this option if you want commands like "xz -d" to work.
 573 //config:       IOW: you'll get xz applet, but it will always require -d option.
 574
 575 //applet:IF_UNXZ(APPLET(unxz, BB_DIR_USR_BIN, BB_SUID_DROP))
 576 //                APPLET_ODDNAME:name   main  location        suid_type     help
 577 //applet:IF_XZCAT(APPLET_ODDNAME(xzcat, unxz, BB_DIR_USR_BIN, BB_SUID_DROP, xzcat))
 578 //applet:IF_XZ(   APPLET_ODDNAME(xz,    unxz, BB_DIR_USR_BIN, BB_SUID_DROP, xz))
 579 //kbuild:lib-$(CONFIG_UNXZ) += bbunzip.o
 580 //kbuild:lib-$(CONFIG_XZCAT) += bbunzip.o
 581 //kbuild:lib-$(CONFIG_XZ) += bbunzip.o
 582 #if ENABLE_UNXZ || ENABLE_XZCAT || ENABLE_XZ
 583 int unxz_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
 584 int unxz_main(int argc UNUSED_PARAM, char **argv)
 585 {
 586         IF_XZ(int opts =) getopt32(argv, BBUNPK_OPTSTR "dt");
 587 # if ENABLE_XZ
 588         /* xz without -d or -t? */
 589         if (applet_name[2] == '\0' && !(opts & (BBUNPK_OPT_DECOMPRESS|BBUNPK_OPT_TEST)))
 590                 bb_show_usage();
 591 # endif
 592         /* xzcat? */
 593         if (ENABLE_XZCAT && applet_name[2] == 'c')
 594                 option_mask32 |= BBUNPK_OPT_STDOUT;
 595
 596         argv += optind;
 597         return bbunpack(argv, unpack_xz_stream, make_new_name_generic, "xz");
 598 }
 599 #endif