1 /* vi: set sw=4 ts=4: */
3 * Common code for gunzip-like applets
5 * Licensed under GPLv2 or later, see file LICENSE in this source tree.
13 /* only some decompressors: */
15 OPT_DECOMPRESS = 1 << 3,
20 int open_to_or_warn(int to_fd, const char *filename, int flags, int mode)
22 int fd = open3_or_warn(filename, flags, mode);
30 char* FAST_FUNC append_ext(char *filename, const char *expected_ext)
32 return xasprintf("%s.%s", filename, expected_ext);
35 int FAST_FUNC bbunpack(char **argv,
36 IF_DESKTOP(long long) int FAST_FUNC (*unpacker)(unpack_info_t *info),
37 char* FAST_FUNC (*make_new_name)(char *filename, const char *expected_ext),
38 const char *expected_ext
42 IF_DESKTOP(long long) int status;
43 char *filename, *new_name;
44 smallint exitcode = 0;
48 /* NB: new_name is *maybe* malloc'ed! */
50 filename = *argv; /* can be NULL - 'streaming' bunzip2 */
52 if (filename && LONE_DASH(filename))
57 if (stat(filename, &stat_buf) != 0) {
58 bb_simple_perror_msg(filename);
63 if (open_to_or_warn(STDIN_FILENO, filename, O_RDONLY, 0))
67 /* Special cases: test, stdout */
68 if (option_mask32 & (OPT_STDOUT|OPT_TEST)) {
69 if (option_mask32 & OPT_TEST)
70 if (open_to_or_warn(STDOUT_FILENO, bb_dev_null, O_WRONLY, 0))
75 /* Open dst if we are going to unpack to file */
77 new_name = make_new_name(filename, expected_ext);
79 bb_error_msg("%s: unknown suffix - ignored", filename);
83 /* -f: overwrite existing output files */
84 if (option_mask32 & OPT_FORCE) {
88 /* O_EXCL: "real" bunzip2 doesn't overwrite files */
89 /* GNU gunzip does not bail out, but goes to next file */
90 if (open_to_or_warn(STDOUT_FILENO, new_name, O_WRONLY | O_CREAT | O_EXCL,
95 /* Check that the input is sane */
96 if (isatty(STDIN_FILENO) && (option_mask32 & OPT_FORCE) == 0) {
97 bb_error_msg_and_die("compressed data not read from terminal, "
98 "use -f to force it");
101 /* memset(&info, 0, sizeof(info)); */
102 info.mtime = 0; /* so far it has one member only */
103 status = unpacker(&info);
106 xclose(STDOUT_FILENO); /* with error check! */
109 char *del = new_name;
111 /* TODO: restore other things? */
113 struct timeval times[2];
115 times[1].tv_sec = times[0].tv_sec = info.mtime;
116 times[1].tv_usec = times[0].tv_usec = 0;
117 /* Note: we closed it first.
118 * On some systems calling utimes
119 * then closing resets the mtime
120 * back to current time. */
121 utimes(new_name, times); /* ignoring errors */
124 /* Delete _compressed_ file */
126 /* restore extension (unless tgz -> tar case) */
127 if (new_name == filename)
128 filename[strlen(filename)] = '.';
132 #if 0 /* Currently buggy - wrong name: "a.gz: 261% - replaced with a.gz" */
133 /* Extreme bloat for gunzip compat */
134 if (ENABLE_DESKTOP && (option_mask32 & OPT_VERBOSE) && status >= 0) {
135 fprintf(stderr, "%s: %u%% - replaced with %s\n",
136 filename, (unsigned)(stat_buf.st_size*100 / (status+1)), new_name);
141 if (new_name != filename)
144 } while (*argv && *++argv);
149 #if ENABLE_UNCOMPRESS || ENABLE_BUNZIP2 || ENABLE_UNLZMA || ENABLE_UNXZ
151 char* FAST_FUNC make_new_name_generic(char *filename, const char *expected_ext)
153 char *extension = strrchr(filename, '.');
154 if (!extension || strcmp(extension + 1, expected_ext) != 0) {
155 /* Mimic GNU gunzip - "real" bunzip2 tries to */
156 /* unpack file anyway, to file.out */
166 * Uncompress applet for busybox (c) 2002 Glenn McGrath
168 * Licensed under GPLv2 or later, see file LICENSE in this source tree.
171 //usage:#define uncompress_trivial_usage
172 //usage: "[-cf] [FILE]..."
173 //usage:#define uncompress_full_usage "\n\n"
174 //usage: "Decompress .Z file[s]\n"
175 //usage: "\n -c Write to stdout"
176 //usage: "\n -f Overwrite"
178 #if ENABLE_UNCOMPRESS
180 IF_DESKTOP(long long) int FAST_FUNC unpack_uncompress(unpack_info_t *info UNUSED_PARAM)
182 IF_DESKTOP(long long) int status = -1;
184 if ((xread_char(STDIN_FILENO) != 0x1f) || (xread_char(STDIN_FILENO) != 0x9d)) {
185 bb_error_msg("invalid magic");
187 status = unpack_Z_stream(STDIN_FILENO, STDOUT_FILENO);
191 int uncompress_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
192 int uncompress_main(int argc UNUSED_PARAM, char **argv)
194 getopt32(argv, "cf");
197 return bbunpack(argv, unpack_uncompress, make_new_name_generic, "Z");
203 * Gzip implementation for busybox
205 * Based on GNU gzip v1.2.4 Copyright (C) 1992-1993 Jean-loup Gailly.
207 * Originally adjusted for busybox by Sven Rudolph <sr1@inf.tu-dresden.de>
208 * based on gzip sources
210 * Adjusted further by Erik Andersen <andersen@codepoet.org> to support files as
211 * well as stdin/stdout, and to generally behave itself wrt command line
214 * General cleanup to better adhere to the style guide and make use of standard
215 * busybox functions by Glenn McGrath
217 * Licensed under GPLv2 or later, see file LICENSE in this source tree.
219 * gzip (GNU zip) -- compress files with zip algorithm and 'compress' interface
220 * Copyright (C) 1992-1993 Jean-loup Gailly
221 * The unzip code was written and put in the public domain by Mark Adler.
222 * Portions of the lzw code are derived from the public domain 'compress'
223 * written by Spencer Thomas, Joe Orost, James Woods, Jim McKie, Steve Davies,
224 * Ken Turkowski, Dave Mack and Peter Jannesen.
226 * See the license_msg below and the file COPYING for the software license.
227 * See the file algorithm.doc for the compression algorithms and file formats.
230 //usage:#define gunzip_trivial_usage
231 //usage: "[-cft] [FILE]..."
232 //usage:#define gunzip_full_usage "\n\n"
233 //usage: "Decompress FILEs (or stdin)\n"
234 //usage: "\n -c Write to stdout"
235 //usage: "\n -f Force"
236 //usage: "\n -t Test file integrity"
238 //usage:#define gunzip_example_usage
239 //usage: "$ ls -la /tmp/BusyBox*\n"
240 //usage: "-rw-rw-r-- 1 andersen andersen 557009 Apr 11 10:55 /tmp/BusyBox-0.43.tar.gz\n"
241 //usage: "$ gunzip /tmp/BusyBox-0.43.tar.gz\n"
242 //usage: "$ ls -la /tmp/BusyBox*\n"
243 //usage: "-rw-rw-r-- 1 andersen andersen 1761280 Apr 14 17:47 /tmp/BusyBox-0.43.tar\n"
245 //usage:#define zcat_trivial_usage
247 //usage:#define zcat_full_usage "\n\n"
248 //usage: "Decompress to stdout"
252 char* FAST_FUNC make_new_name_gunzip(char *filename, const char *expected_ext UNUSED_PARAM)
254 char *extension = strrchr(filename, '.');
260 if (strcmp(extension, "tgz" + 1) == 0
261 #if ENABLE_FEATURE_SEAMLESS_Z
262 || (extension[0] == 'Z' && extension[1] == '\0')
265 extension[-1] = '\0';
266 } else if (strcmp(extension, "tgz") == 0) {
267 filename = xstrdup(filename);
268 extension = strrchr(filename, '.');
277 IF_DESKTOP(long long) int FAST_FUNC unpack_gunzip(unpack_info_t *info)
279 IF_DESKTOP(long long) int status = -1;
281 /* do the decompression, and cleanup */
282 if (xread_char(STDIN_FILENO) == 0x1f) {
283 unsigned char magic2;
285 magic2 = xread_char(STDIN_FILENO);
286 if (ENABLE_FEATURE_SEAMLESS_Z && magic2 == 0x9d) {
287 status = unpack_Z_stream(STDIN_FILENO, STDOUT_FILENO);
288 } else if (magic2 == 0x8b) {
289 status = unpack_gz_stream_with_info(STDIN_FILENO, STDOUT_FILENO, info);
294 bb_error_msg("error inflating");
298 bb_error_msg("invalid magic");
299 /* status is still == -1 */
304 * Linux kernel build uses gzip -d -n. We accept and ignore it.
307 * gzip: do not save the original file name and time stamp.
308 * (The original name is always saved if the name had to be truncated.)
309 * gunzip: do not restore the original file name/time even if present
310 * (remove only the gzip suffix from the compressed file name).
311 * This option is the default when decompressing.
313 * gzip: always save the original file name and time stamp (this is the default)
314 * gunzip: restore the original file name and time stamp if present.
316 int gunzip_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
317 int gunzip_main(int argc UNUSED_PARAM, char **argv)
319 getopt32(argv, "cfvdtn");
321 /* if called as zcat */
322 if (applet_name[1] == 'c')
323 option_mask32 |= OPT_STDOUT;
325 return bbunpack(argv, unpack_gunzip, make_new_name_gunzip, /*unused:*/ NULL);
331 * Modified for busybox by Glenn McGrath
332 * Added support output to stdout by Thomas Lundquist <thomasez@zelow.no>
334 * Licensed under GPLv2 or later, see file LICENSE in this source tree.
336 //usage:#define bunzip2_trivial_usage
337 //usage: "[-cf] [FILE]..."
338 //usage:#define bunzip2_full_usage "\n\n"
339 //usage: "Decompress FILEs (or stdin)\n"
340 //usage: "\n -c Write to stdout"
341 //usage: "\n -f Force"
342 //usage:#define bzcat_trivial_usage
344 //usage:#define bzcat_full_usage "\n\n"
345 //usage: "Decompress to stdout"
346 //applet:IF_BUNZIP2(APPLET(bunzip2, BB_DIR_USR_BIN, BB_SUID_DROP))
347 //applet:IF_BUNZIP2(APPLET_ODDNAME(bzcat, bunzip2, BB_DIR_USR_BIN, BB_SUID_DROP, bzcat))
350 IF_DESKTOP(long long) int FAST_FUNC unpack_bunzip2(unpack_info_t *info UNUSED_PARAM)
352 return unpack_bz2_stream_prime(STDIN_FILENO, STDOUT_FILENO);
354 int bunzip2_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
355 int bunzip2_main(int argc UNUSED_PARAM, char **argv)
357 getopt32(argv, "cfvdt");
359 if (applet_name[2] == 'c') /* bzcat */
360 option_mask32 |= OPT_STDOUT;
362 return bbunpack(argv, unpack_bunzip2, make_new_name_generic, "bz2");
368 * Small lzma deflate implementation.
369 * Copyright (C) 2006 Aurelien Jacobs <aurel@gnuage.org>
371 * Based on bunzip.c from busybox
373 * Licensed under GPLv2, see file LICENSE in this source tree.
376 //usage:#define unlzma_trivial_usage
377 //usage: "[-cf] [FILE]..."
378 //usage:#define unlzma_full_usage "\n\n"
379 //usage: "Decompress FILE (or stdin)\n"
380 //usage: "\n -c Write to stdout"
381 //usage: "\n -f Force"
383 //usage:#define lzma_trivial_usage
384 //usage: "-d [-cf] [FILE]..."
385 //usage:#define lzma_full_usage "\n\n"
386 //usage: "Decompress FILE (or stdin)\n"
387 //usage: "\n -d Decompress"
388 //usage: "\n -c Write to stdout"
389 //usage: "\n -f Force"
391 //usage:#define lzcat_trivial_usage
393 //usage:#define lzcat_full_usage "\n\n"
394 //usage: "Decompress to stdout"
396 //usage:#define unxz_trivial_usage
397 //usage: "[-cf] [FILE]..."
398 //usage:#define unxz_full_usage "\n\n"
399 //usage: "Decompress FILE (or stdin)\n"
400 //usage: "\n -c Write to stdout"
401 //usage: "\n -f Force"
403 //usage:#define xz_trivial_usage
404 //usage: "-d [-cf] [FILE]..."
405 //usage:#define xz_full_usage "\n\n"
406 //usage: "Decompress FILE (or stdin)\n"
407 //usage: "\n -d Decompress"
408 //usage: "\n -c Write to stdout"
409 //usage: "\n -f Force"
411 //usage:#define xzcat_trivial_usage
413 //usage:#define xzcat_full_usage "\n\n"
414 //usage: "Decompress to stdout"
418 IF_DESKTOP(long long) int FAST_FUNC unpack_unlzma(unpack_info_t *info UNUSED_PARAM)
420 return unpack_lzma_stream(STDIN_FILENO, STDOUT_FILENO);
422 int unlzma_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
423 int unlzma_main(int argc UNUSED_PARAM, char **argv)
425 IF_LZMA(int opts =) getopt32(argv, "cfvdt");
427 /* lzma without -d or -t? */
428 if (applet_name[2] == 'm' && !(opts & (OPT_DECOMPRESS|OPT_TEST)))
432 if (applet_name[2] == 'c')
433 option_mask32 |= OPT_STDOUT;
436 return bbunpack(argv, unpack_unlzma, make_new_name_generic, "lzma");
443 IF_DESKTOP(long long) int FAST_FUNC unpack_unxz(unpack_info_t *info UNUSED_PARAM)
449 xread(STDIN_FILENO, &magic, 6);
450 if (magic.v1 != XZ_MAGIC1a || magic.v2 != XZ_MAGIC2a) {
451 bb_error_msg("invalid magic");
454 return unpack_xz_stream(STDIN_FILENO, STDOUT_FILENO);
456 int unxz_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
457 int unxz_main(int argc UNUSED_PARAM, char **argv)
459 IF_XZ(int opts =) getopt32(argv, "cfvdt");
461 /* xz without -d or -t? */
462 if (applet_name[2] == '\0' && !(opts & (OPT_DECOMPRESS|OPT_TEST)))
466 if (applet_name[2] == 'c')
467 option_mask32 |= OPT_STDOUT;
470 return bbunpack(argv, unpack_unxz, make_new_name_generic, "xz");