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 #include "libbb.h"
   8 #include "bb_archive.h"
   9
  10 //kbuild:lib-$(CONFIG_ZCAT) += bbunzip.o
  11 //kbuild:lib-$(CONFIG_GUNZIP) += bbunzip.o
  12 //kbuild:lib-$(CONFIG_BZCAT) += bbunzip.o
  13 //kbuild:lib-$(CONFIG_BUNZIP2) += bbunzip.o
  14
  15 /* lzop_main() uses bbunpack(), need this: */
  16 //kbuild:lib-$(CONFIG_LZOP) += bbunzip.o
  17 //kbuild:lib-$(CONFIG_LZOPCAT) += bbunzip.o
  18 //kbuild:lib-$(CONFIG_UNLZOP) += bbunzip.o
  19 /* bzip2_main() too: */
  20 //kbuild:lib-$(CONFIG_BZIP2) += bbunzip.o
  21 /* gzip_main() too: */
  22 //kbuild:lib-$(CONFIG_GZIP) += bbunzip.o
  23
  24 /* Note: must be kept in sync with archival/lzop.c */
  25 enum {
  26         OPT_STDOUT     = 1 << 0,
  27         OPT_FORCE      = 1 << 1,
  28         /* only some decompressors: */
  29         OPT_KEEP       = 1 << 2,
  30         OPT_VERBOSE    = 1 << 3,
  31         OPT_QUIET      = 1 << 4,
  32         OPT_DECOMPRESS = 1 << 5,
  33         OPT_TEST       = 1 << 6,
  34         SEAMLESS_MAGIC = (1 << 31) * ENABLE_ZCAT * SEAMLESS_COMPRESSION,
  35 };
  36
  37 static
  38 int open_to_or_warn(int to_fd, const char *filename, int flags, int mode)
  39 {
  40         int fd = open3_or_warn(filename, flags, mode);
  41         if (fd < 0) {
  42                 return 1;
  43         }
  44         xmove_fd(fd, to_fd);
  45         return 0;
  46 }
  47
  48 char* FAST_FUNC append_ext(char *filename, const char *expected_ext)
  49 {
  50         return xasprintf("%s.%s", filename, expected_ext);
  51 }
  52
  53 int FAST_FUNC bbunpack(char **argv,
  54         IF_DESKTOP(long long) int FAST_FUNC (*unpacker)(transformer_state_t *xstate),
  55         char* FAST_FUNC (*make_new_name)(char *filename, const char *expected_ext),
  56         const char *expected_ext
  57 )
  58 {
  59         struct stat stat_buf;
  60         IF_DESKTOP(long long) int status = 0;
  61         char *filename, *new_name;
  62         smallint exitcode = 0;
  63         transformer_state_t xstate;
  64
  65         do {
  66                 /* NB: new_name is *maybe* malloc'ed! */
  67                 new_name = NULL;
  68                 filename = *argv; /* can be NULL - 'streaming' bunzip2 */
  69
  70                 if (filename && LONE_DASH(filename))
  71                         filename = NULL;
  72
  73                 /* Open src */
  74                 if (filename) {
  75                         if (!(option_mask32 & SEAMLESS_MAGIC)) {
  76                                 if (stat(filename, &stat_buf) != 0) {
  77  err_name:
  78                                         bb_simple_perror_msg(filename);
  79  err:
  80                                         exitcode = 1;
  81                                         goto free_name;
  82                                 }
  83                                 if (open_to_or_warn(STDIN_FILENO, filename, O_RDONLY, 0))
  84                                         goto err;
  85                         } else {
  86                                 /* "clever zcat" with FILE */
  87                                 /* fail_if_not_compressed because zcat refuses uncompressed input */
  88                                 int fd = open_zipped(filename, /*fail_if_not_compressed:*/ 1);
  89                                 if (fd < 0)
  90                                         goto err_name;
  91                                 xmove_fd(fd, STDIN_FILENO);
  92                         }
  93                 } else
  94                 if (option_mask32 & SEAMLESS_MAGIC) {
  95                         /* "clever zcat" on stdin */
  96                         if (setup_unzip_on_fd(STDIN_FILENO, /*fail_if_not_compressed*/ 1))
  97                                 goto err;
  98                 }
  99
 100                 /* Special cases: test, stdout */
 101                 if (option_mask32 & (OPT_STDOUT|OPT_TEST)) {
 102                         if (option_mask32 & OPT_TEST)
 103                                 if (open_to_or_warn(STDOUT_FILENO, bb_dev_null, O_WRONLY, 0))
 104                                         xfunc_die();
 105                         filename = NULL;
 106                 }
 107
 108                 /* Open dst if we are going to unpack to file */
 109                 if (filename) {
 110                         new_name = make_new_name(filename, expected_ext);
 111                         if (!new_name) {
 112                                 bb_error_msg("%s: unknown suffix - ignored", filename);
 113                                 goto err;
 114                         }
 115
 116                         /* -f: overwrite existing output files */
 117                         if (option_mask32 & OPT_FORCE) {
 118                                 unlink(new_name);
 119                         }
 120
 121                         /* O_EXCL: "real" bunzip2 doesn't overwrite files */
 122                         /* GNU gunzip does not bail out, but goes to next file */
 123                         if (open_to_or_warn(STDOUT_FILENO, new_name, O_WRONLY | O_CREAT | O_EXCL,
 124                                         stat_buf.st_mode))
 125                                 goto err;
 126                 }
 127
 128                 /* Check that the input is sane */
 129                 if (!(option_mask32 & OPT_FORCE) && isatty(STDIN_FILENO)) {
 130                         bb_error_msg_and_die("compressed data not read from terminal, "
 131                                         "use -f to force it");
 132                 }
 133
 134                 if (!(option_mask32 & SEAMLESS_MAGIC)) {
 135                         init_transformer_state(&xstate);
 136                         /*xstate.signature_skipped = 0; - already is */
 137                         /*xstate.src_fd = STDIN_FILENO; - already is */
 138                         xstate.dst_fd = STDOUT_FILENO;
 139                         status = unpacker(&xstate);
 140                         if (status < 0)
 141                                 exitcode = 1;
 142                 } else {
 143                         if (bb_copyfd_eof(STDIN_FILENO, STDOUT_FILENO) < 0)
 144                                 /* Disk full, tty closed, etc. No point in continuing */
 145                                 xfunc_die();
 146                 }
 147
 148                 if (!(option_mask32 & OPT_STDOUT))
 149                         xclose(STDOUT_FILENO); /* with error check! */
 150
 151                 if (filename) {
 152                         char *del = new_name;
 153
 154                         if (status >= 0) {
 155                                 unsigned new_name_len;
 156
 157                                 /* TODO: restore other things? */
 158                                 if (xstate.mtime != 0) {
 159                                         struct timeval times[2];
 160
 161                                         times[1].tv_sec = times[0].tv_sec = xstate.mtime;
 162                                         times[1].tv_usec = times[0].tv_usec = 0;
 163                                         /* Note: we closed it first.
 164                                          * On some systems calling utimes
 165                                          * then closing resets the mtime
 166                                          * back to current time. */
 167                                         utimes(new_name, times); /* ignoring errors */
 168                                 }
 169
 170                                 if (ENABLE_DESKTOP)
 171                                         new_name_len = strlen(new_name);
 172                                 /* Restore source filename (unless tgz -> tar case) */
 173                                 if (new_name == filename) {
 174                                         new_name_len = strlen(filename);
 175                                         filename[new_name_len] = '.';
 176                                 }
 177                                 /* Extreme bloat for gunzip compat */
 178                                 /* Some users do want this info... */
 179                                 if (ENABLE_DESKTOP && (option_mask32 & OPT_VERBOSE)) {
 180                                         unsigned percent = status
 181                                                 ? ((uoff_t)stat_buf.st_size * 100u / (unsigned long long)status)
 182                                                 : 0;
 183                                         fprintf(stderr, "%s: %u%% - replaced with %.*s\n",
 184                                                 filename,
 185                                                 100u - percent,
 186                                                 new_name_len, new_name
 187                                         );
 188                                 }
 189                                 /* Delete _source_ file */
 190                                 del = filename;
 191                                 if (option_mask32 & OPT_KEEP) /* ... unless -k */
 192                                         del = NULL;
 193                         }
 194                         if (del)
 195                                 xunlink(del);
 196  free_name:
 197                         if (new_name != filename)
 198                                 free(new_name);
 199                 }
 200         } while (*argv && *++argv);
 201
 202         if (option_mask32 & OPT_STDOUT)
 203                 xclose(STDOUT_FILENO); /* with error check! */
 204
 205         return exitcode;
 206 }
 207
 208 #if ENABLE_UNCOMPRESS \
 209  || ENABLE_FEATURE_BZIP2_DECOMPRESS \
 210  || ENABLE_UNLZMA || ENABLE_LZCAT || ENABLE_LZMA \
 211  || ENABLE_UNXZ || ENABLE_XZCAT || ENABLE_XZ
 212 static
 213 char* FAST_FUNC make_new_name_generic(char *filename, const char *expected_ext)
 214 {
 215         char *extension = strrchr(filename, '.');
 216         if (!extension || strcmp(extension + 1, expected_ext) != 0) {
 217                 /* Mimic GNU gunzip - "real" bunzip2 tries to */
 218                 /* unpack file anyway, to file.out */
 219                 return NULL;
 220         }
 221         *extension = '\0';
 222         return filename;
 223 }
 224 #endif
 225
 226
 227 /*
 228  * Uncompress applet for busybox (c) 2002 Glenn McGrath
 229  *
 230  * Licensed under GPLv2 or later, see file LICENSE in this source tree.
 231  */
 232 //usage:#define uncompress_trivial_usage
 233 //usage:       "[-cf] [FILE]..."
 234 //usage:#define uncompress_full_usage "\n\n"
 235 //usage:       "Decompress .Z file[s]\n"
 236 //usage:     "\n        -c      Write to stdout"
 237 //usage:     "\n        -f      Overwrite"
 238
 239 //config:config UNCOMPRESS
 240 //config:       bool "uncompress"
 241 //config:       default n  # ancient
 242 //config:       help
 243 //config:         uncompress is used to decompress archives created by compress.
 244 //config:         Not much used anymore, replaced by gzip/gunzip.
 245
 246 //applet:IF_UNCOMPRESS(APPLET(uncompress, BB_DIR_BIN, BB_SUID_DROP))
 247 //kbuild:lib-$(CONFIG_UNCOMPRESS) += bbunzip.o
 248 #if ENABLE_UNCOMPRESS
 249 int uncompress_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
 250 int uncompress_main(int argc UNUSED_PARAM, char **argv)
 251 {
 252 // (N)compress 4.2.4.4:
 253 // -d If given, decompression is done instead
 254 // -c Write output on stdout, don't remove original
 255 // -b Parameter limits the max number of bits/code
 256 // -f Forces output file to be generated
 257 // -v Write compression statistics
 258 // -V Output vesion and compile options
 259 // -r Recursive. If a filename is a directory, descend into it and compress everything
 260         getopt32(argv, "cf");
 261
 262         argv += optind;
 263
 264         return bbunpack(argv, unpack_Z_stream, make_new_name_generic, "Z");
 265 }
 266 #endif
 267
 268
 269 /*
 270  * Gzip implementation for busybox
 271  *
 272  * Based on GNU gzip v1.2.4 Copyright (C) 1992-1993 Jean-loup Gailly.
 273  *
 274  * Originally adjusted for busybox by Sven Rudolph <sr1@inf.tu-dresden.de>
 275  * based on gzip sources
 276  *
 277  * Adjusted further by Erik Andersen <andersen@codepoet.org> to support files as
 278  * well as stdin/stdout, and to generally behave itself wrt command line
 279  * handling.
 280  *
 281  * General cleanup to better adhere to the style guide and make use of standard
 282  * busybox functions by Glenn McGrath
 283  *
 284  * Licensed under GPLv2 or later, see file LICENSE in this source tree.
 285  *
 286  * gzip (GNU zip) -- compress files with zip algorithm and 'compress' interface
 287  * Copyright (C) 1992-1993 Jean-loup Gailly
 288  * The unzip code was written and put in the public domain by Mark Adler.
 289  * Portions of the lzw code are derived from the public domain 'compress'
 290  * written by Spencer Thomas, Joe Orost, James Woods, Jim McKie, Steve Davies,
 291  * Ken Turkowski, Dave Mack and Peter Jannesen.
 292  */
 293 //usage:#define gunzip_trivial_usage
 294 //usage:       "[-cfkt] [FILE]..."
 295 //usage:#define gunzip_full_usage "\n\n"
 296 //usage:       "Decompress FILEs (or stdin)\n"
 297 //usage:     "\n        -c      Write to stdout"
 298 //usage:     "\n        -f      Force"
 299 //usage:     "\n        -k      Keep input files"
 300 //usage:     "\n        -t      Test file integrity"
 301 //usage:
 302 //usage:#define gunzip_example_usage
 303 //usage:       "$ ls -la /tmp/BusyBox*\n"
 304 //usage:       "-rw-rw-r--    1 andersen andersen   557009 Apr 11 10:55 /tmp/BusyBox-0.43.tar.gz\n"
 305 //usage:       "$ gunzip /tmp/BusyBox-0.43.tar.gz\n"
 306 //usage:       "$ ls -la /tmp/BusyBox*\n"
 307 //usage:       "-rw-rw-r--    1 andersen andersen  1761280 Apr 14 17:47 /tmp/BusyBox-0.43.tar\n"
 308 //usage:
 309 //usage:#define zcat_trivial_usage
 310 //usage:       "[FILE]..."
 311 //usage:#define zcat_full_usage "\n\n"
 312 //usage:       "Decompress to stdout"
 313
 314 //config:config GUNZIP
 315 //config:       bool "gunzip"
 316 //config:       default y
 317 //config:       select FEATURE_GZIP_DECOMPRESS
 318 //config:       help
 319 //config:         gunzip is used to decompress archives created by gzip.
 320 //config:         You can use the `-t' option to test the integrity of
 321 //config:         an archive, without decompressing it.
 322 //config:
 323 //config:config ZCAT
 324 //config:       bool "zcat"
 325 //config:       default y
 326 //config:       select FEATURE_GZIP_DECOMPRESS
 327 //config:       help
 328 //config:         Alias to "gunzip -c".
 329 //config:
 330 //config:config FEATURE_GUNZIP_LONG_OPTIONS
 331 //config:       bool "Enable long options"
 332 //config:       default y
 333 //config:       depends on (GUNZIP || ZCAT) && LONG_OPTS
 334
 335 //applet:IF_GUNZIP(APPLET(gunzip, BB_DIR_BIN, BB_SUID_DROP))
 336 //               APPLET_ODDNAME:name  main    location    suid_type     help
 337 //applet:IF_ZCAT(APPLET_ODDNAME(zcat, gunzip, BB_DIR_BIN, BB_SUID_DROP, zcat))
 338 #if ENABLE_FEATURE_GZIP_DECOMPRESS
 339 static
 340 char* FAST_FUNC make_new_name_gunzip(char *filename, const char *expected_ext UNUSED_PARAM)
 341 {
 342         char *extension = strrchr(filename, '.');
 343
 344         if (!extension)
 345                 return NULL;
 346
 347         extension++;
 348         if (strcmp(extension, "tgz" + 1) == 0
 349 #if ENABLE_FEATURE_SEAMLESS_Z
 350          || (extension[0] == 'Z' && extension[1] == '\0')
 351 #endif
 352         ) {
 353                 extension[-1] = '\0';
 354         } else if (strcmp(extension, "tgz") == 0) {
 355                 filename = xstrdup(filename);
 356                 extension = strrchr(filename, '.');
 357                 extension[2] = 'a';
 358                 extension[3] = 'r';
 359         } else {
 360                 return NULL;
 361         }
 362         return filename;
 363 }
 364
 365 #if ENABLE_FEATURE_GUNZIP_LONG_OPTIONS
 366 static const char gunzip_longopts[] ALIGN1 =
 367         "stdout\0"              No_argument       "c"
 368         "to-stdout\0"           No_argument       "c"
 369         "force\0"               No_argument       "f"
 370         "test\0"                No_argument       "t"
 371         "no-name\0"             No_argument       "n"
 372         ;
 373 #endif
 374
 375 /*
 376  * Linux kernel build uses gzip -d -n. We accept and ignore it.
 377  * Man page says:
 378  * -n --no-name
 379  * gzip: do not save the original file name and time stamp.
 380  * (The original name is always saved if the name had to be truncated.)
 381  * gunzip: do not restore the original file name/time even if present
 382  * (remove only the gzip suffix from the compressed file name).
 383  * This option is the default when decompressing.
 384  * -N --name
 385  * gzip: always save the original file name and time stamp (this is the default)
 386  * gunzip: restore the original file name and time stamp if present.
 387  */
 388 int gunzip_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
 389 int gunzip_main(int argc UNUSED_PARAM, char **argv)
 390 {
 391 #if ENABLE_FEATURE_GUNZIP_LONG_OPTIONS
 392         applet_long_options = gunzip_longopts;
 393 #endif
 394         getopt32(argv, "cfkvqdtn");
 395         argv += optind;
 396
 397         /* If called as zcat...
 398          * Normally, "zcat" is just "gunzip -c".
 399          * But if seamless magic is enabled, then we are much more clever.
 400          */
 401         if (ENABLE_ZCAT && applet_name[1] == 'c')
 402                 option_mask32 |= OPT_STDOUT | SEAMLESS_MAGIC;
 403
 404         return bbunpack(argv, unpack_gz_stream, make_new_name_gunzip, /*unused:*/ NULL);
 405 }
 406 #endif /* FEATURE_GZIP_DECOMPRESS */
 407
 408
 409 /*
 410  * Modified for busybox by Glenn McGrath
 411  * Added support output to stdout by Thomas Lundquist <thomasez@zelow.no>
 412  *
 413  * Licensed under GPLv2 or later, see file LICENSE in this source tree.
 414  */
 415 //usage:#define bunzip2_trivial_usage
 416 //usage:       "[-cfk] [FILE]..."
 417 //usage:#define bunzip2_full_usage "\n\n"
 418 //usage:       "Decompress FILEs (or stdin)\n"
 419 //usage:     "\n        -c      Write to stdout"
 420 //usage:     "\n        -f      Force"
 421 //usage:     "\n        -k      Keep input files"
 422 //usage:#define bzcat_trivial_usage
 423 //usage:       "[FILE]..."
 424 //usage:#define bzcat_full_usage "\n\n"
 425 //usage:       "Decompress to stdout"
 426
 427 //config:config BUNZIP2
 428 //config:       bool "bunzip2"
 429 //config:       default y
 430 //config:       select FEATURE_BZIP2_DECOMPRESS
 431 //config:       help
 432 //config:         bunzip2 is a compression utility using the Burrows-Wheeler block
 433 //config:         sorting text compression algorithm, and Huffman coding. Compression
 434 //config:         is generally considerably better than that achieved by more
 435 //config:         conventional LZ77/LZ78-based compressors, and approaches the
 436 //config:         performance of the PPM family of statistical compressors.
 437 //config:
 438 //config:         Unless you have a specific application which requires bunzip2, you
 439 //config:         should probably say N here.
 440 //config:
 441 //config:config BZCAT
 442 //config:       bool "bzcat"
 443 //config:       default y
 444 //config:       select FEATURE_BZIP2_DECOMPRESS
 445 //config:       help
 446 //config:         Alias to "bunzip2 -c".
 447
 448 //applet:IF_BUNZIP2(APPLET(bunzip2, BB_DIR_USR_BIN, BB_SUID_DROP))
 449 //                APPLET_ODDNAME:name   main     location        suid_type     help
 450 //applet:IF_BZCAT(APPLET_ODDNAME(bzcat, bunzip2, BB_DIR_USR_BIN, BB_SUID_DROP, bzcat))
 451 #if ENABLE_FEATURE_BZIP2_DECOMPRESS || ENABLE_BUNZIP2
 452 int bunzip2_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
 453 int bunzip2_main(int argc UNUSED_PARAM, char **argv)
 454 {
 455         getopt32(argv, "cfkvqdt");
 456         argv += optind;
 457         if (ENABLE_BZCAT && applet_name[2] == 'c') /* bzcat */
 458                 option_mask32 |= OPT_STDOUT;
 459
 460         return bbunpack(argv, unpack_bz2_stream, make_new_name_generic, "bz2");
 461 }
 462 #endif
 463
 464
 465 /*
 466  * Small lzma deflate implementation.
 467  * Copyright (C) 2006  Aurelien Jacobs <aurel@gnuage.org>
 468  *
 469  * Based on bunzip.c from busybox
 470  *
 471  * Licensed under GPLv2, see file LICENSE in this source tree.
 472  */
 473 //usage:#define unlzma_trivial_usage
 474 //usage:       "[-cfk] [FILE]..."
 475 //usage:#define unlzma_full_usage "\n\n"
 476 //usage:       "Decompress FILE (or stdin)\n"
 477 //usage:     "\n        -c      Write to stdout"
 478 //usage:     "\n        -f      Force"
 479 //usage:     "\n        -k      Keep input files"
 480 //usage:
 481 //usage:#define lzma_trivial_usage
 482 //usage:       "-d [-cfk] [FILE]..."
 483 //usage:#define lzma_full_usage "\n\n"
 484 //usage:       "Decompress FILE (or stdin)\n"
 485 //usage:     "\n        -d      Decompress"
 486 //usage:     "\n        -c      Write to stdout"
 487 //usage:     "\n        -f      Force"
 488 //usage:     "\n        -k      Keep input files"
 489 //usage:
 490 //usage:#define lzcat_trivial_usage
 491 //usage:       "[FILE]..."
 492 //usage:#define lzcat_full_usage "\n\n"
 493 //usage:       "Decompress to stdout"
 494
 495 //config:config UNLZMA
 496 //config:       bool "unlzma"
 497 //config:       default y
 498 //config:       help
 499 //config:         unlzma is a compression utility using the Lempel-Ziv-Markov chain
 500 //config:         compression algorithm, and range coding. Compression
 501 //config:         is generally considerably better than that achieved by the bzip2
 502 //config:         compressors.
 503 //config:
 504 //config:         The BusyBox unlzma applet is limited to decompression only.
 505 //config:         On an x86 system, this applet adds about 4K.
 506 //config:
 507 //config:config LZCAT
 508 //config:       bool "lzcat"
 509 //config:       default y
 510 //config:       help
 511 //config:         unlzma is a compression utility using the Lempel-Ziv-Markov chain
 512 //config:         compression algorithm, and range coding. Compression
 513 //config:         is generally considerably better than that achieved by the bzip2
 514 //config:         compressors.
 515 //config:
 516 //config:         The BusyBox unlzma applet is limited to decompression only.
 517 //config:         On an x86 system, this applet adds about 4K.
 518 //config:
 519 //config:config LZMA
 520 //config:       bool "lzma -d"
 521 //config:       default y
 522 //config:       help
 523 //config:         Enable this option if you want commands like "lzma -d" to work.
 524 //config:         IOW: you'll get lzma applet, but it will always require -d option.
 525 //config:
 526 //config:config FEATURE_LZMA_FAST
 527 //config:       bool "Optimize for speed"
 528 //config:       default n
 529 //config:       depends on UNLZMA || LZCAT || LZMA
 530 //config:       help
 531 //config:         This option reduces decompression time by about 25% at the cost of
 532 //config:         a 1K bigger binary.
 533
 534 //applet:IF_UNLZMA(APPLET(unlzma, BB_DIR_USR_BIN, BB_SUID_DROP))
 535 //                APPLET_ODDNAME:name   main    location        suid_type     help
 536 //applet:IF_LZCAT(APPLET_ODDNAME(lzcat, unlzma, BB_DIR_USR_BIN, BB_SUID_DROP, lzcat))
 537 //applet:IF_LZMA( APPLET_ODDNAME(lzma,  unlzma, BB_DIR_USR_BIN, BB_SUID_DROP, lzma))
 538 //kbuild:lib-$(CONFIG_UNLZMA) += bbunzip.o
 539 //kbuild:lib-$(CONFIG_LZCAT) += bbunzip.o
 540 //kbuild:lib-$(CONFIG_LZMA) += bbunzip.o
 541 #if ENABLE_UNLZMA || ENABLE_LZCAT || ENABLE_LZMA
 542 int unlzma_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
 543 int unlzma_main(int argc UNUSED_PARAM, char **argv)
 544 {
 545         IF_LZMA(int opts =) getopt32(argv, "cfkvqdt");
 546 # if ENABLE_LZMA
 547         /* lzma without -d or -t? */
 548         if (applet_name[2] == 'm' && !(opts & (OPT_DECOMPRESS|OPT_TEST)))
 549                 bb_show_usage();
 550 # endif
 551         /* lzcat? */
 552         if (ENABLE_LZCAT && applet_name[2] == 'c')
 553                 option_mask32 |= OPT_STDOUT;
 554
 555         argv += optind;
 556         return bbunpack(argv, unpack_lzma_stream, make_new_name_generic, "lzma");
 557 }
 558 #endif
 559
 560
 561 //usage:#define unxz_trivial_usage
 562 //usage:       "[-cfk] [FILE]..."
 563 //usage:#define unxz_full_usage "\n\n"
 564 //usage:       "Decompress FILE (or stdin)\n"
 565 //usage:     "\n        -c      Write to stdout"
 566 //usage:     "\n        -f      Force"
 567 //usage:     "\n        -k      Keep input files"
 568 //usage:
 569 //usage:#define xz_trivial_usage
 570 //usage:       "-d [-cfk] [FILE]..."
 571 //usage:#define xz_full_usage "\n\n"
 572 //usage:       "Decompress FILE (or stdin)\n"
 573 //usage:     "\n        -d      Decompress"
 574 //usage:     "\n        -c      Write to stdout"
 575 //usage:     "\n        -f      Force"
 576 //usage:     "\n        -k      Keep input files"
 577 //usage:
 578 //usage:#define xzcat_trivial_usage
 579 //usage:       "[FILE]..."
 580 //usage:#define xzcat_full_usage "\n\n"
 581 //usage:       "Decompress to stdout"
 582
 583 //config:config UNXZ
 584 //config:       bool "unxz"
 585 //config:       default y
 586 //config:       help
 587 //config:         unxz is a unlzma successor.
 588 //config:
 589 //config:config XZCAT
 590 //config:       bool "xzcat"
 591 //config:       default y
 592 //config:       help
 593 //config:         Alias to "unxz -c".
 594 //config:
 595 //config:config XZ
 596 //config:       bool "xz -d"
 597 //config:       default y
 598 //config:       help
 599 //config:         Enable this option if you want commands like "xz -d" to work.
 600 //config:         IOW: you'll get xz applet, but it will always require -d option.
 601
 602 //applet:IF_UNXZ(APPLET(unxz, BB_DIR_USR_BIN, BB_SUID_DROP))
 603 //                APPLET_ODDNAME:name   main  location        suid_type     help
 604 //applet:IF_XZCAT(APPLET_ODDNAME(xzcat, unxz, BB_DIR_USR_BIN, BB_SUID_DROP, xzcat))
 605 //applet:IF_XZ(   APPLET_ODDNAME(xz,    unxz, BB_DIR_USR_BIN, BB_SUID_DROP, xz))
 606 //kbuild:lib-$(CONFIG_UNXZ) += bbunzip.o
 607 //kbuild:lib-$(CONFIG_XZCAT) += bbunzip.o
 608 //kbuild:lib-$(CONFIG_XZ) += bbunzip.o
 609 #if ENABLE_UNXZ || ENABLE_XZCAT || ENABLE_XZ
 610 int unxz_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
 611 int unxz_main(int argc UNUSED_PARAM, char **argv)
 612 {
 613         IF_XZ(int opts =) getopt32(argv, "cfkvqdt");
 614 # if ENABLE_XZ
 615         /* xz without -d or -t? */
 616         if (applet_name[2] == '\0' && !(opts & (OPT_DECOMPRESS|OPT_TEST)))
 617                 bb_show_usage();
 618 # endif
 619         /* xzcat? */
 620         if (ENABLE_XZCAT && applet_name[2] == 'c')
 621                 option_mask32 |= OPT_STDOUT;
 622
 623         argv += optind;
 624         return bbunpack(argv, unpack_xz_stream, make_new_name_generic, "xz");
 625 }
 626 #endif