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.
8 #include "bb_archive.h"
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);
107 if (!(option_mask32 & OPT_STDOUT))
108 xclose(STDOUT_FILENO); /* with error check! */
111 char *del = new_name;
113 /* TODO: restore other things? */
115 struct timeval times[2];
117 times[1].tv_sec = times[0].tv_sec = info.mtime;
118 times[1].tv_usec = times[0].tv_usec = 0;
119 /* Note: we closed it first.
120 * On some systems calling utimes
121 * then closing resets the mtime
122 * back to current time. */
123 utimes(new_name, times); /* ignoring errors */
126 /* Delete _compressed_ file */
128 /* restore extension (unless tgz -> tar case) */
129 if (new_name == filename)
130 filename[strlen(filename)] = '.';
134 #if 0 /* Currently buggy - wrong name: "a.gz: 261% - replaced with a.gz" */
135 /* Extreme bloat for gunzip compat */
136 if (ENABLE_DESKTOP && (option_mask32 & OPT_VERBOSE) && status >= 0) {
137 fprintf(stderr, "%s: %u%% - replaced with %s\n",
138 filename, (unsigned)(stat_buf.st_size*100 / (status+1)), new_name);
143 if (new_name != filename)
146 } while (*argv && *++argv);
148 if (option_mask32 & OPT_STDOUT)
149 xclose(STDOUT_FILENO); /* with error check! */
154 #if ENABLE_UNCOMPRESS || ENABLE_BUNZIP2 || ENABLE_UNLZMA || ENABLE_UNXZ
156 char* FAST_FUNC make_new_name_generic(char *filename, const char *expected_ext)
158 char *extension = strrchr(filename, '.');
159 if (!extension || strcmp(extension + 1, expected_ext) != 0) {
160 /* Mimic GNU gunzip - "real" bunzip2 tries to */
161 /* unpack file anyway, to file.out */
171 * Uncompress applet for busybox (c) 2002 Glenn McGrath
173 * Licensed under GPLv2 or later, see file LICENSE in this source tree.
176 //usage:#define uncompress_trivial_usage
177 //usage: "[-cf] [FILE]..."
178 //usage:#define uncompress_full_usage "\n\n"
179 //usage: "Decompress .Z file[s]\n"
180 //usage: "\n -c Write to stdout"
181 //usage: "\n -f Overwrite"
183 #if ENABLE_UNCOMPRESS
185 IF_DESKTOP(long long) int FAST_FUNC unpack_uncompress(unpack_info_t *info UNUSED_PARAM)
187 IF_DESKTOP(long long) int status = -1;
189 if ((xread_char(STDIN_FILENO) != 0x1f) || (xread_char(STDIN_FILENO) != 0x9d)) {
190 bb_error_msg("invalid magic");
192 status = unpack_Z_stream(STDIN_FILENO, STDOUT_FILENO);
196 int uncompress_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
197 int uncompress_main(int argc UNUSED_PARAM, char **argv)
199 getopt32(argv, "cf");
202 return bbunpack(argv, unpack_uncompress, make_new_name_generic, "Z");
208 * Gzip implementation for busybox
210 * Based on GNU gzip v1.2.4 Copyright (C) 1992-1993 Jean-loup Gailly.
212 * Originally adjusted for busybox by Sven Rudolph <sr1@inf.tu-dresden.de>
213 * based on gzip sources
215 * Adjusted further by Erik Andersen <andersen@codepoet.org> to support files as
216 * well as stdin/stdout, and to generally behave itself wrt command line
219 * General cleanup to better adhere to the style guide and make use of standard
220 * busybox functions by Glenn McGrath
222 * Licensed under GPLv2 or later, see file LICENSE in this source tree.
224 * gzip (GNU zip) -- compress files with zip algorithm and 'compress' interface
225 * Copyright (C) 1992-1993 Jean-loup Gailly
226 * The unzip code was written and put in the public domain by Mark Adler.
227 * Portions of the lzw code are derived from the public domain 'compress'
228 * written by Spencer Thomas, Joe Orost, James Woods, Jim McKie, Steve Davies,
229 * Ken Turkowski, Dave Mack and Peter Jannesen.
231 * See the license_msg below and the file COPYING for the software license.
232 * See the file algorithm.doc for the compression algorithms and file formats.
235 //usage:#define gunzip_trivial_usage
236 //usage: "[-cft] [FILE]..."
237 //usage:#define gunzip_full_usage "\n\n"
238 //usage: "Decompress FILEs (or stdin)\n"
239 //usage: "\n -c Write to stdout"
240 //usage: "\n -f Force"
241 //usage: "\n -t Test file integrity"
243 //usage:#define gunzip_example_usage
244 //usage: "$ ls -la /tmp/BusyBox*\n"
245 //usage: "-rw-rw-r-- 1 andersen andersen 557009 Apr 11 10:55 /tmp/BusyBox-0.43.tar.gz\n"
246 //usage: "$ gunzip /tmp/BusyBox-0.43.tar.gz\n"
247 //usage: "$ ls -la /tmp/BusyBox*\n"
248 //usage: "-rw-rw-r-- 1 andersen andersen 1761280 Apr 14 17:47 /tmp/BusyBox-0.43.tar\n"
250 //usage:#define zcat_trivial_usage
252 //usage:#define zcat_full_usage "\n\n"
253 //usage: "Decompress to stdout"
257 char* FAST_FUNC make_new_name_gunzip(char *filename, const char *expected_ext UNUSED_PARAM)
259 char *extension = strrchr(filename, '.');
265 if (strcmp(extension, "tgz" + 1) == 0
266 #if ENABLE_FEATURE_SEAMLESS_Z
267 || (extension[0] == 'Z' && extension[1] == '\0')
270 extension[-1] = '\0';
271 } else if (strcmp(extension, "tgz") == 0) {
272 filename = xstrdup(filename);
273 extension = strrchr(filename, '.');
282 IF_DESKTOP(long long) int FAST_FUNC unpack_gunzip(unpack_info_t *info)
284 IF_DESKTOP(long long) int status = -1;
286 /* do the decompression, and cleanup */
287 if (xread_char(STDIN_FILENO) == 0x1f) {
288 unsigned char magic2;
290 magic2 = xread_char(STDIN_FILENO);
291 if (ENABLE_FEATURE_SEAMLESS_Z && magic2 == 0x9d) {
292 status = unpack_Z_stream(STDIN_FILENO, STDOUT_FILENO);
293 } else if (magic2 == 0x8b) {
294 status = unpack_gz_stream_with_info(STDIN_FILENO, STDOUT_FILENO, info);
299 bb_error_msg("error inflating");
303 bb_error_msg("invalid magic");
304 /* status is still == -1 */
309 * Linux kernel build uses gzip -d -n. We accept and ignore it.
312 * gzip: do not save the original file name and time stamp.
313 * (The original name is always saved if the name had to be truncated.)
314 * gunzip: do not restore the original file name/time even if present
315 * (remove only the gzip suffix from the compressed file name).
316 * This option is the default when decompressing.
318 * gzip: always save the original file name and time stamp (this is the default)
319 * gunzip: restore the original file name and time stamp if present.
321 int gunzip_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
322 int gunzip_main(int argc UNUSED_PARAM, char **argv)
324 getopt32(argv, "cfvdtn");
326 /* if called as zcat */
327 if (applet_name[1] == 'c')
328 option_mask32 |= OPT_STDOUT;
330 return bbunpack(argv, unpack_gunzip, make_new_name_gunzip, /*unused:*/ NULL);
336 * Modified for busybox by Glenn McGrath
337 * Added support output to stdout by Thomas Lundquist <thomasez@zelow.no>
339 * Licensed under GPLv2 or later, see file LICENSE in this source tree.
341 //usage:#define bunzip2_trivial_usage
342 //usage: "[-cf] [FILE]..."
343 //usage:#define bunzip2_full_usage "\n\n"
344 //usage: "Decompress FILEs (or stdin)\n"
345 //usage: "\n -c Write to stdout"
346 //usage: "\n -f Force"
347 //usage:#define bzcat_trivial_usage
349 //usage:#define bzcat_full_usage "\n\n"
350 //usage: "Decompress to stdout"
351 //applet:IF_BUNZIP2(APPLET(bunzip2, BB_DIR_USR_BIN, BB_SUID_DROP))
352 //applet:IF_BUNZIP2(APPLET_ODDNAME(bzcat, bunzip2, BB_DIR_USR_BIN, BB_SUID_DROP, bzcat))
355 IF_DESKTOP(long long) int FAST_FUNC unpack_bunzip2(unpack_info_t *info UNUSED_PARAM)
357 return unpack_bz2_stream_prime(STDIN_FILENO, STDOUT_FILENO);
359 int bunzip2_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
360 int bunzip2_main(int argc UNUSED_PARAM, char **argv)
362 getopt32(argv, "cfvdt");
364 if (applet_name[2] == 'c') /* bzcat */
365 option_mask32 |= OPT_STDOUT;
367 return bbunpack(argv, unpack_bunzip2, make_new_name_generic, "bz2");
373 * Small lzma deflate implementation.
374 * Copyright (C) 2006 Aurelien Jacobs <aurel@gnuage.org>
376 * Based on bunzip.c from busybox
378 * Licensed under GPLv2, see file LICENSE in this source tree.
381 //usage:#define unlzma_trivial_usage
382 //usage: "[-cf] [FILE]..."
383 //usage:#define unlzma_full_usage "\n\n"
384 //usage: "Decompress FILE (or stdin)\n"
385 //usage: "\n -c Write to stdout"
386 //usage: "\n -f Force"
388 //usage:#define lzma_trivial_usage
389 //usage: "-d [-cf] [FILE]..."
390 //usage:#define lzma_full_usage "\n\n"
391 //usage: "Decompress FILE (or stdin)\n"
392 //usage: "\n -d Decompress"
393 //usage: "\n -c Write to stdout"
394 //usage: "\n -f Force"
396 //usage:#define lzcat_trivial_usage
398 //usage:#define lzcat_full_usage "\n\n"
399 //usage: "Decompress to stdout"
401 //usage:#define unxz_trivial_usage
402 //usage: "[-cf] [FILE]..."
403 //usage:#define unxz_full_usage "\n\n"
404 //usage: "Decompress FILE (or stdin)\n"
405 //usage: "\n -c Write to stdout"
406 //usage: "\n -f Force"
408 //usage:#define xz_trivial_usage
409 //usage: "-d [-cf] [FILE]..."
410 //usage:#define xz_full_usage "\n\n"
411 //usage: "Decompress FILE (or stdin)\n"
412 //usage: "\n -d Decompress"
413 //usage: "\n -c Write to stdout"
414 //usage: "\n -f Force"
416 //usage:#define xzcat_trivial_usage
418 //usage:#define xzcat_full_usage "\n\n"
419 //usage: "Decompress to stdout"
423 IF_DESKTOP(long long) int FAST_FUNC unpack_unlzma(unpack_info_t *info UNUSED_PARAM)
425 return unpack_lzma_stream(STDIN_FILENO, STDOUT_FILENO);
427 int unlzma_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
428 int unlzma_main(int argc UNUSED_PARAM, char **argv)
430 IF_LZMA(int opts =) getopt32(argv, "cfvdt");
432 /* lzma without -d or -t? */
433 if (applet_name[2] == 'm' && !(opts & (OPT_DECOMPRESS|OPT_TEST)))
437 if (applet_name[2] == 'c')
438 option_mask32 |= OPT_STDOUT;
441 return bbunpack(argv, unpack_unlzma, make_new_name_generic, "lzma");
448 IF_DESKTOP(long long) int FAST_FUNC unpack_unxz(unpack_info_t *info UNUSED_PARAM)
454 xread(STDIN_FILENO, &magic, 6);
455 if (magic.v1 != XZ_MAGIC1a || magic.v2 != XZ_MAGIC2a) {
456 bb_error_msg("invalid magic");
459 return unpack_xz_stream(STDIN_FILENO, STDOUT_FILENO);
461 int unxz_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
462 int unxz_main(int argc UNUSED_PARAM, char **argv)
464 IF_XZ(int opts =) getopt32(argv, "cfvdt");
466 /* xz without -d or -t? */
467 if (applet_name[2] == '\0' && !(opts & (OPT_DECOMPRESS|OPT_TEST)))
471 if (applet_name[2] == 'c')
472 option_mask32 |= OPT_STDOUT;
475 return bbunpack(argv, unpack_unxz, make_new_name_generic, "xz");