[3320] | 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 "archive.h"
|
---|
| 9 |
|
---|
| 10 | enum {
|
---|
| 11 | OPT_STDOUT = 1 << 0,
|
---|
| 12 | OPT_FORCE = 1 << 1,
|
---|
| 13 | /* only some decompressors: */
|
---|
| 14 | OPT_VERBOSE = 1 << 2,
|
---|
| 15 | OPT_DECOMPRESS = 1 << 3,
|
---|
| 16 | OPT_TEST = 1 << 4,
|
---|
| 17 | };
|
---|
| 18 |
|
---|
| 19 | static
|
---|
| 20 | int open_to_or_warn(int to_fd, const char *filename, int flags, int mode)
|
---|
| 21 | {
|
---|
| 22 | int fd = open3_or_warn(filename, flags, mode);
|
---|
| 23 | if (fd < 0) {
|
---|
| 24 | return 1;
|
---|
| 25 | }
|
---|
| 26 | xmove_fd(fd, to_fd);
|
---|
| 27 | return 0;
|
---|
| 28 | }
|
---|
| 29 |
|
---|
| 30 | char* FAST_FUNC append_ext(char *filename, const char *expected_ext)
|
---|
| 31 | {
|
---|
| 32 | return xasprintf("%s.%s", filename, expected_ext);
|
---|
| 33 | }
|
---|
| 34 |
|
---|
| 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
|
---|
| 39 | )
|
---|
| 40 | {
|
---|
| 41 | struct stat stat_buf;
|
---|
| 42 | IF_DESKTOP(long long) int status;
|
---|
| 43 | char *filename, *new_name;
|
---|
| 44 | smallint exitcode = 0;
|
---|
| 45 | unpack_info_t info;
|
---|
| 46 |
|
---|
| 47 | do {
|
---|
| 48 | /* NB: new_name is *maybe* malloc'ed! */
|
---|
| 49 | new_name = NULL;
|
---|
| 50 | filename = *argv; /* can be NULL - 'streaming' bunzip2 */
|
---|
| 51 |
|
---|
| 52 | if (filename && LONE_DASH(filename))
|
---|
| 53 | filename = NULL;
|
---|
| 54 |
|
---|
| 55 | /* Open src */
|
---|
| 56 | if (filename) {
|
---|
| 57 | if (stat(filename, &stat_buf) != 0) {
|
---|
| 58 | bb_simple_perror_msg(filename);
|
---|
| 59 | err:
|
---|
| 60 | exitcode = 1;
|
---|
| 61 | goto free_name;
|
---|
| 62 | }
|
---|
| 63 | if (open_to_or_warn(STDIN_FILENO, filename, O_RDONLY, 0))
|
---|
| 64 | goto err;
|
---|
| 65 | }
|
---|
| 66 |
|
---|
| 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))
|
---|
| 71 | goto err;
|
---|
| 72 | filename = NULL;
|
---|
| 73 | }
|
---|
| 74 |
|
---|
| 75 | /* Open dst if we are going to unpack to file */
|
---|
| 76 | if (filename) {
|
---|
| 77 | new_name = make_new_name(filename, expected_ext);
|
---|
| 78 | if (!new_name) {
|
---|
| 79 | bb_error_msg("%s: unknown suffix - ignored", filename);
|
---|
| 80 | goto err;
|
---|
| 81 | }
|
---|
| 82 |
|
---|
| 83 | /* -f: overwrite existing output files */
|
---|
| 84 | if (option_mask32 & OPT_FORCE) {
|
---|
| 85 | unlink(new_name);
|
---|
| 86 | }
|
---|
| 87 |
|
---|
| 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,
|
---|
| 91 | stat_buf.st_mode))
|
---|
| 92 | goto err;
|
---|
| 93 | }
|
---|
| 94 |
|
---|
| 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");
|
---|
| 99 | }
|
---|
| 100 |
|
---|
| 101 | /* memset(&info, 0, sizeof(info)); */
|
---|
| 102 | info.mtime = 0; /* so far it has one member only */
|
---|
| 103 | status = unpacker(&info);
|
---|
| 104 | if (status < 0)
|
---|
| 105 | exitcode = 1;
|
---|
| 106 | xclose(STDOUT_FILENO); /* with error check! */
|
---|
| 107 |
|
---|
| 108 | if (filename) {
|
---|
| 109 | char *del = new_name;
|
---|
| 110 | if (status >= 0) {
|
---|
| 111 | /* TODO: restore other things? */
|
---|
| 112 | if (info.mtime) {
|
---|
| 113 | struct timeval times[2];
|
---|
| 114 |
|
---|
| 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 */
|
---|
| 122 | }
|
---|
| 123 |
|
---|
| 124 | /* Delete _compressed_ file */
|
---|
| 125 | del = filename;
|
---|
| 126 | /* restore extension (unless tgz -> tar case) */
|
---|
| 127 | if (new_name == filename)
|
---|
| 128 | filename[strlen(filename)] = '.';
|
---|
| 129 | }
|
---|
| 130 | xunlink(del);
|
---|
| 131 |
|
---|
| 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);
|
---|
| 137 | }
|
---|
| 138 | #endif
|
---|
| 139 |
|
---|
| 140 | free_name:
|
---|
| 141 | if (new_name != filename)
|
---|
| 142 | free(new_name);
|
---|
| 143 | }
|
---|
| 144 | } while (*argv && *++argv);
|
---|
| 145 |
|
---|
| 146 | return exitcode;
|
---|
| 147 | }
|
---|
| 148 |
|
---|
| 149 | #if ENABLE_UNCOMPRESS || ENABLE_BUNZIP2 || ENABLE_UNLZMA || ENABLE_UNXZ
|
---|
| 150 | static
|
---|
| 151 | char* FAST_FUNC make_new_name_generic(char *filename, const char *expected_ext)
|
---|
| 152 | {
|
---|
| 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 */
|
---|
| 157 | return NULL;
|
---|
| 158 | }
|
---|
| 159 | *extension = '\0';
|
---|
| 160 | return filename;
|
---|
| 161 | }
|
---|
| 162 | #endif
|
---|
| 163 |
|
---|
| 164 |
|
---|
| 165 | /*
|
---|
| 166 | * Uncompress applet for busybox (c) 2002 Glenn McGrath
|
---|
| 167 | *
|
---|
| 168 | * Licensed under GPLv2 or later, see file LICENSE in this source tree.
|
---|
| 169 | */
|
---|
| 170 | #if ENABLE_UNCOMPRESS
|
---|
| 171 | static
|
---|
| 172 | IF_DESKTOP(long long) int FAST_FUNC unpack_uncompress(unpack_info_t *info UNUSED_PARAM)
|
---|
| 173 | {
|
---|
| 174 | IF_DESKTOP(long long) int status = -1;
|
---|
| 175 |
|
---|
| 176 | if ((xread_char(STDIN_FILENO) != 0x1f) || (xread_char(STDIN_FILENO) != 0x9d)) {
|
---|
| 177 | bb_error_msg("invalid magic");
|
---|
| 178 | } else {
|
---|
| 179 | status = unpack_Z_stream(STDIN_FILENO, STDOUT_FILENO);
|
---|
| 180 | }
|
---|
| 181 | return status;
|
---|
| 182 | }
|
---|
| 183 | int uncompress_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
|
---|
| 184 | int uncompress_main(int argc UNUSED_PARAM, char **argv)
|
---|
| 185 | {
|
---|
| 186 | getopt32(argv, "cf");
|
---|
| 187 | argv += optind;
|
---|
| 188 |
|
---|
| 189 | return bbunpack(argv, unpack_uncompress, make_new_name_generic, "Z");
|
---|
| 190 | }
|
---|
| 191 | #endif
|
---|
| 192 |
|
---|
| 193 |
|
---|
| 194 | /*
|
---|
| 195 | * Gzip implementation for busybox
|
---|
| 196 | *
|
---|
| 197 | * Based on GNU gzip v1.2.4 Copyright (C) 1992-1993 Jean-loup Gailly.
|
---|
| 198 | *
|
---|
| 199 | * Originally adjusted for busybox by Sven Rudolph <sr1@inf.tu-dresden.de>
|
---|
| 200 | * based on gzip sources
|
---|
| 201 | *
|
---|
| 202 | * Adjusted further by Erik Andersen <andersen@codepoet.org> to support files as
|
---|
| 203 | * well as stdin/stdout, and to generally behave itself wrt command line
|
---|
| 204 | * handling.
|
---|
| 205 | *
|
---|
| 206 | * General cleanup to better adhere to the style guide and make use of standard
|
---|
| 207 | * busybox functions by Glenn McGrath
|
---|
| 208 | *
|
---|
| 209 | * Licensed under GPLv2 or later, see file LICENSE in this source tree.
|
---|
| 210 | *
|
---|
| 211 | * gzip (GNU zip) -- compress files with zip algorithm and 'compress' interface
|
---|
| 212 | * Copyright (C) 1992-1993 Jean-loup Gailly
|
---|
| 213 | * The unzip code was written and put in the public domain by Mark Adler.
|
---|
| 214 | * Portions of the lzw code are derived from the public domain 'compress'
|
---|
| 215 | * written by Spencer Thomas, Joe Orost, James Woods, Jim McKie, Steve Davies,
|
---|
| 216 | * Ken Turkowski, Dave Mack and Peter Jannesen.
|
---|
| 217 | *
|
---|
| 218 | * See the license_msg below and the file COPYING for the software license.
|
---|
| 219 | * See the file algorithm.doc for the compression algorithms and file formats.
|
---|
| 220 | */
|
---|
| 221 | #if ENABLE_GUNZIP
|
---|
| 222 | static
|
---|
| 223 | char* FAST_FUNC make_new_name_gunzip(char *filename, const char *expected_ext UNUSED_PARAM)
|
---|
| 224 | {
|
---|
| 225 | char *extension = strrchr(filename, '.');
|
---|
| 226 |
|
---|
| 227 | if (!extension)
|
---|
| 228 | return NULL;
|
---|
| 229 |
|
---|
| 230 | extension++;
|
---|
| 231 | if (strcmp(extension, "tgz" + 1) == 0
|
---|
| 232 | #if ENABLE_FEATURE_SEAMLESS_Z
|
---|
| 233 | || (extension[0] == 'Z' && extension[1] == '\0')
|
---|
| 234 | #endif
|
---|
| 235 | ) {
|
---|
| 236 | extension[-1] = '\0';
|
---|
| 237 | } else if (strcmp(extension, "tgz") == 0) {
|
---|
| 238 | filename = xstrdup(filename);
|
---|
| 239 | extension = strrchr(filename, '.');
|
---|
| 240 | extension[2] = 'a';
|
---|
| 241 | extension[3] = 'r';
|
---|
| 242 | } else {
|
---|
| 243 | return NULL;
|
---|
| 244 | }
|
---|
| 245 | return filename;
|
---|
| 246 | }
|
---|
| 247 | static
|
---|
| 248 | IF_DESKTOP(long long) int FAST_FUNC unpack_gunzip(unpack_info_t *info)
|
---|
| 249 | {
|
---|
| 250 | IF_DESKTOP(long long) int status = -1;
|
---|
| 251 |
|
---|
| 252 | /* do the decompression, and cleanup */
|
---|
| 253 | if (xread_char(STDIN_FILENO) == 0x1f) {
|
---|
| 254 | unsigned char magic2;
|
---|
| 255 |
|
---|
| 256 | magic2 = xread_char(STDIN_FILENO);
|
---|
| 257 | if (ENABLE_FEATURE_SEAMLESS_Z && magic2 == 0x9d) {
|
---|
| 258 | status = unpack_Z_stream(STDIN_FILENO, STDOUT_FILENO);
|
---|
| 259 | } else if (magic2 == 0x8b) {
|
---|
| 260 | status = unpack_gz_stream_with_info(STDIN_FILENO, STDOUT_FILENO, info);
|
---|
| 261 | } else {
|
---|
| 262 | goto bad_magic;
|
---|
| 263 | }
|
---|
| 264 | if (status < 0) {
|
---|
| 265 | bb_error_msg("error inflating");
|
---|
| 266 | }
|
---|
| 267 | } else {
|
---|
| 268 | bad_magic:
|
---|
| 269 | bb_error_msg("invalid magic");
|
---|
| 270 | /* status is still == -1 */
|
---|
| 271 | }
|
---|
| 272 | return status;
|
---|
| 273 | }
|
---|
| 274 | /*
|
---|
| 275 | * Linux kernel build uses gzip -d -n. We accept and ignore it.
|
---|
| 276 | * Man page says:
|
---|
| 277 | * -n --no-name
|
---|
| 278 | * gzip: do not save the original file name and time stamp.
|
---|
| 279 | * (The original name is always saved if the name had to be truncated.)
|
---|
| 280 | * gunzip: do not restore the original file name/time even if present
|
---|
| 281 | * (remove only the gzip suffix from the compressed file name).
|
---|
| 282 | * This option is the default when decompressing.
|
---|
| 283 | * -N --name
|
---|
| 284 | * gzip: always save the original file name and time stamp (this is the default)
|
---|
| 285 | * gunzip: restore the original file name and time stamp if present.
|
---|
| 286 | */
|
---|
| 287 | int gunzip_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
|
---|
| 288 | int gunzip_main(int argc UNUSED_PARAM, char **argv)
|
---|
| 289 | {
|
---|
| 290 | getopt32(argv, "cfvdtn");
|
---|
| 291 | argv += optind;
|
---|
| 292 | /* if called as zcat */
|
---|
| 293 | if (applet_name[1] == 'c')
|
---|
| 294 | option_mask32 |= OPT_STDOUT;
|
---|
| 295 |
|
---|
| 296 | return bbunpack(argv, unpack_gunzip, make_new_name_gunzip, /*unused:*/ NULL);
|
---|
| 297 | }
|
---|
| 298 | #endif
|
---|
| 299 |
|
---|
| 300 |
|
---|
| 301 | /*
|
---|
| 302 | * Modified for busybox by Glenn McGrath
|
---|
| 303 | * Added support output to stdout by Thomas Lundquist <thomasez@zelow.no>
|
---|
| 304 | *
|
---|
| 305 | * Licensed under GPLv2 or later, see file LICENSE in this source tree.
|
---|
| 306 | */
|
---|
| 307 | //usage:#define bunzip2_trivial_usage
|
---|
| 308 | //usage: "[-cf] [FILE]..."
|
---|
| 309 | //usage:#define bunzip2_full_usage "\n\n"
|
---|
| 310 | //usage: "Decompress FILEs (or stdin)\n"
|
---|
| 311 | //usage: "\nOptions:"
|
---|
| 312 | //usage: "\n -c Write to stdout"
|
---|
| 313 | //usage: "\n -f Force"
|
---|
| 314 | //usage:#define bzcat_trivial_usage
|
---|
| 315 | //usage: "FILE"
|
---|
| 316 | //usage:#define bzcat_full_usage "\n\n"
|
---|
| 317 | //usage: "Decompress to stdout"
|
---|
| 318 | //applet:IF_BUNZIP2(APPLET(bunzip2, _BB_DIR_USR_BIN, _BB_SUID_DROP))
|
---|
| 319 | //applet:IF_BUNZIP2(APPLET_ODDNAME(bzcat, bunzip2, _BB_DIR_USR_BIN, _BB_SUID_DROP, bzcat))
|
---|
| 320 | #if ENABLE_BUNZIP2
|
---|
| 321 | static
|
---|
| 322 | IF_DESKTOP(long long) int FAST_FUNC unpack_bunzip2(unpack_info_t *info UNUSED_PARAM)
|
---|
| 323 | {
|
---|
| 324 | return unpack_bz2_stream_prime(STDIN_FILENO, STDOUT_FILENO);
|
---|
| 325 | }
|
---|
| 326 | int bunzip2_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
|
---|
| 327 | int bunzip2_main(int argc UNUSED_PARAM, char **argv)
|
---|
| 328 | {
|
---|
| 329 | getopt32(argv, "cfvdt");
|
---|
| 330 | argv += optind;
|
---|
| 331 | if (applet_name[2] == 'c') /* bzcat */
|
---|
| 332 | option_mask32 |= OPT_STDOUT;
|
---|
| 333 |
|
---|
| 334 | return bbunpack(argv, unpack_bunzip2, make_new_name_generic, "bz2");
|
---|
| 335 | }
|
---|
| 336 | #endif
|
---|
| 337 |
|
---|
| 338 |
|
---|
| 339 | /*
|
---|
| 340 | * Small lzma deflate implementation.
|
---|
| 341 | * Copyright (C) 2006 Aurelien Jacobs <aurel@gnuage.org>
|
---|
| 342 | *
|
---|
| 343 | * Based on bunzip.c from busybox
|
---|
| 344 | *
|
---|
| 345 | * Licensed under GPLv2, see file LICENSE in this source tree.
|
---|
| 346 | */
|
---|
| 347 | #if ENABLE_UNLZMA
|
---|
| 348 | static
|
---|
| 349 | IF_DESKTOP(long long) int FAST_FUNC unpack_unlzma(unpack_info_t *info UNUSED_PARAM)
|
---|
| 350 | {
|
---|
| 351 | return unpack_lzma_stream(STDIN_FILENO, STDOUT_FILENO);
|
---|
| 352 | }
|
---|
| 353 | int unlzma_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
|
---|
| 354 | int unlzma_main(int argc UNUSED_PARAM, char **argv)
|
---|
| 355 | {
|
---|
| 356 | IF_LZMA(int opts =) getopt32(argv, "cfvdt");
|
---|
| 357 | # if ENABLE_LZMA
|
---|
| 358 | /* lzma without -d or -t? */
|
---|
| 359 | if (applet_name[2] == 'm' && !(opts & (OPT_DECOMPRESS|OPT_TEST)))
|
---|
| 360 | bb_show_usage();
|
---|
| 361 | # endif
|
---|
| 362 | /* lzcat? */
|
---|
| 363 | if (applet_name[2] == 'c')
|
---|
| 364 | option_mask32 |= OPT_STDOUT;
|
---|
| 365 |
|
---|
| 366 | argv += optind;
|
---|
| 367 | return bbunpack(argv, unpack_unlzma, make_new_name_generic, "lzma");
|
---|
| 368 | }
|
---|
| 369 | #endif
|
---|
| 370 |
|
---|
| 371 |
|
---|
| 372 | #if ENABLE_UNXZ
|
---|
| 373 | static
|
---|
| 374 | IF_DESKTOP(long long) int FAST_FUNC unpack_unxz(unpack_info_t *info UNUSED_PARAM)
|
---|
| 375 | {
|
---|
| 376 | struct {
|
---|
| 377 | uint32_t v1;
|
---|
| 378 | uint16_t v2;
|
---|
| 379 | } magic;
|
---|
| 380 | xread(STDIN_FILENO, &magic, 6);
|
---|
| 381 | if (magic.v1 != XZ_MAGIC1a || magic.v2 != XZ_MAGIC2a) {
|
---|
| 382 | bb_error_msg("invalid magic");
|
---|
| 383 | return -1;
|
---|
| 384 | }
|
---|
| 385 | return unpack_xz_stream(STDIN_FILENO, STDOUT_FILENO);
|
---|
| 386 | }
|
---|
| 387 | int unxz_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
|
---|
| 388 | int unxz_main(int argc UNUSED_PARAM, char **argv)
|
---|
| 389 | {
|
---|
| 390 | IF_XZ(int opts =) getopt32(argv, "cfvdt");
|
---|
| 391 | # if ENABLE_XZ
|
---|
| 392 | /* xz without -d or -t? */
|
---|
| 393 | if (applet_name[2] == '\0' && !(opts & (OPT_DECOMPRESS|OPT_TEST)))
|
---|
| 394 | bb_show_usage();
|
---|
| 395 | # endif
|
---|
| 396 | /* xzcat? */
|
---|
| 397 | if (applet_name[2] == 'c')
|
---|
| 398 | option_mask32 |= OPT_STDOUT;
|
---|
| 399 |
|
---|
| 400 | argv += optind;
|
---|
| 401 | return bbunpack(argv, unpack_unxz, make_new_name_generic, "xz");
|
---|
| 402 | }
|
---|
| 403 | #endif
|
---|