1 /*- 2 * Copyright (c) 2003-2008 Tim Kientzle 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR 15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 17 * IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT, 18 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 19 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 20 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 21 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26 #include "bsdtar_platform.h" 27 __FBSDID("$FreeBSD: src/usr.bin/tar/bsdtar.c,v 1.93 2008/11/08 04:43:24 kientzle Exp $"); 28 29 #ifdef HAVE_SYS_PARAM_H 30 #include <sys/param.h> 31 #endif 32 #ifdef HAVE_SYS_STAT_H 33 #include <sys/stat.h> 34 #endif 35 #ifdef HAVE_COPYFILE_H 36 #include <copyfile.h> 37 #endif 38 #ifdef HAVE_ERRNO_H 39 #include <errno.h> 40 #endif 41 #ifdef HAVE_FCNTL_H 42 #include <fcntl.h> 43 #endif 44 #ifdef HAVE_LANGINFO_H 45 #include <langinfo.h> 46 #endif 47 #ifdef HAVE_LOCALE_H 48 #include <locale.h> 49 #endif 50 #ifdef HAVE_PATHS_H 51 #include <paths.h> 52 #endif 53 #ifdef HAVE_SIGNAL_H 54 #include <signal.h> 55 #endif 56 #include <stdio.h> 57 #ifdef HAVE_STDLIB_H 58 #include <stdlib.h> 59 #endif 60 #ifdef HAVE_STRING_H 61 #include <string.h> 62 #endif 63 #ifdef HAVE_TIME_H 64 #include <time.h> 65 #endif 66 #ifdef HAVE_UNISTD_H 67 #include <unistd.h> 68 #endif 69 70 #include "bsdtar.h" 71 #include "err.h" 72 73 /* 74 * Per POSIX.1-1988, tar defaults to reading/writing archives to/from 75 * the default tape device for the system. Pick something reasonable here. 76 */ 77 #ifdef __linux 78 #define _PATH_DEFTAPE "/dev/st0" 79 #endif 80 #if defined(_WIN32) && !defined(__CYGWIN__) 81 #define _PATH_DEFTAPE "\\\\.\\tape0" 82 #endif 83 #if defined(__APPLE__) 84 #undef _PATH_DEFTAPE 85 #define _PATH_DEFTAPE "-" /* Mac OS has no tape support, default to stdio. */ 86 #endif 87 88 #ifndef _PATH_DEFTAPE 89 #define _PATH_DEFTAPE "/dev/tape" 90 #endif 91 92 #ifdef __MINGW32__ 93 int _CRT_glob = 0; /* Disable broken CRT globbing. */ 94 #endif 95 96 #if defined(HAVE_SIGACTION) && (defined(SIGINFO) || defined(SIGUSR1)) 97 static volatile int siginfo_occurred; 98 99 static void 100 siginfo_handler(int sig) 101 { 102 (void)sig; /* UNUSED */ 103 siginfo_occurred = 1; 104 } 105 106 int 107 need_report(void) 108 { 109 int r = siginfo_occurred; 110 siginfo_occurred = 0; 111 return (r); 112 } 113 #else 114 int 115 need_report(void) 116 { 117 return (0); 118 } 119 #endif 120 121 static void long_help(void); 122 static void only_mode(struct bsdtar *, const char *opt, 123 const char *valid); 124 static void set_mode(struct bsdtar *, char opt); 125 static void version(void); 126 127 /* A basic set of security flags to request from libarchive. */ 128 #define SECURITY \ 129 (ARCHIVE_EXTRACT_SECURE_SYMLINKS \ 130 | ARCHIVE_EXTRACT_SECURE_NODOTDOT) 131 132 int 133 main(int argc, char **argv) 134 { 135 struct bsdtar *bsdtar, bsdtar_storage; 136 int opt, t; 137 char compression, compression2; 138 const char *compression_name, *compression2_name; 139 const char *compress_program; 140 char option_a, option_o; 141 char possible_help_request; 142 char buff[16]; 143 144 /* 145 * Use a pointer for consistency, but stack-allocated storage 146 * for ease of cleanup. 147 */ 148 bsdtar = &bsdtar_storage; 149 memset(bsdtar, 0, sizeof(*bsdtar)); 150 bsdtar->fd = -1; /* Mark as "unused" */ 151 bsdtar->gid = -1; 152 bsdtar->uid = -1; 153 option_a = option_o = 0; 154 compression = compression2 = '\0'; 155 compression_name = compression2_name = NULL; 156 compress_program = NULL; 157 158 #if defined(HAVE_SIGACTION) 159 { /* Set up signal handling. */ 160 struct sigaction sa; 161 sa.sa_handler = siginfo_handler; 162 sigemptyset(&sa.sa_mask); 163 sa.sa_flags = 0; 164 #ifdef SIGINFO 165 if (sigaction(SIGINFO, &sa, NULL)) 166 lafe_errc(1, errno, "sigaction(SIGINFO) failed"); 167 #endif 168 #ifdef SIGUSR1 169 /* ... and treat SIGUSR1 the same way as SIGINFO. */ 170 if (sigaction(SIGUSR1, &sa, NULL)) 171 lafe_errc(1, errno, "sigaction(SIGUSR1) failed"); 172 #endif 173 #ifdef SIGPIPE 174 /* Ignore SIGPIPE signals. */ 175 sa.sa_handler = SIG_IGN; 176 sigaction(SIGPIPE, &sa, NULL); 177 #endif 178 } 179 #endif 180 181 /* Set lafe_progname before calling lafe_warnc. */ 182 lafe_setprogname(*argv, "bsdtar"); 183 184 #if HAVE_SETLOCALE 185 if (setlocale(LC_ALL, "") == NULL) 186 lafe_warnc(0, "Failed to set default locale"); 187 #endif 188 #if defined(HAVE_NL_LANGINFO) && defined(HAVE_D_MD_ORDER) 189 bsdtar->day_first = (*nl_langinfo(D_MD_ORDER) == 'd'); 190 #endif 191 possible_help_request = 0; 192 193 /* Look up uid of current user for future reference */ 194 bsdtar->user_uid = geteuid(); 195 196 /* Default: open tape drive. */ 197 bsdtar->filename = getenv("TAPE"); 198 if (bsdtar->filename == NULL) 199 bsdtar->filename = _PATH_DEFTAPE; 200 201 /* Default block size settings. */ 202 bsdtar->bytes_per_block = DEFAULT_BYTES_PER_BLOCK; 203 /* Allow library to default this unless user specifies -b. */ 204 bsdtar->bytes_in_last_block = -1; 205 206 /* Default: preserve mod time on extract */ 207 bsdtar->extract_flags = ARCHIVE_EXTRACT_TIME; 208 209 /* Default: Perform basic security checks. */ 210 bsdtar->extract_flags |= SECURITY; 211 212 #ifndef _WIN32 213 /* On POSIX systems, assume --same-owner and -p when run by 214 * the root user. This doesn't make any sense on Windows. */ 215 if (bsdtar->user_uid == 0) { 216 /* --same-owner */ 217 bsdtar->extract_flags |= ARCHIVE_EXTRACT_OWNER; 218 /* -p */ 219 bsdtar->extract_flags |= ARCHIVE_EXTRACT_PERM; 220 bsdtar->extract_flags |= ARCHIVE_EXTRACT_ACL; 221 bsdtar->extract_flags |= ARCHIVE_EXTRACT_XATTR; 222 bsdtar->extract_flags |= ARCHIVE_EXTRACT_FFLAGS; 223 bsdtar->extract_flags |= ARCHIVE_EXTRACT_MAC_METADATA; 224 } 225 #endif 226 227 /* 228 * Enable Mac OS "copyfile()" extension by default. 229 * This has no effect on other platforms. 230 */ 231 bsdtar->readdisk_flags |= ARCHIVE_READDISK_MAC_COPYFILE; 232 #ifdef COPYFILE_DISABLE_VAR 233 if (getenv(COPYFILE_DISABLE_VAR)) 234 bsdtar->readdisk_flags &= ~ARCHIVE_READDISK_MAC_COPYFILE; 235 #endif 236 bsdtar->matching = archive_match_new(); 237 if (bsdtar->matching == NULL) 238 lafe_errc(1, errno, "Out of memory"); 239 bsdtar->cset = cset_new(); 240 if (bsdtar->cset == NULL) 241 lafe_errc(1, errno, "Out of memory"); 242 243 bsdtar->argv = argv; 244 bsdtar->argc = argc; 245 246 /* 247 * Comments following each option indicate where that option 248 * originated: SUSv2, POSIX, GNU tar, star, etc. If there's 249 * no such comment, then I don't know of anyone else who 250 * implements that option. 251 */ 252 while ((opt = bsdtar_getopt(bsdtar)) != -1) { 253 switch (opt) { 254 case 'a': /* GNU tar */ 255 option_a = 1; /* Record it and resolve it later. */ 256 break; 257 case 'B': /* GNU tar */ 258 /* libarchive doesn't need this; just ignore it. */ 259 break; 260 case 'b': /* SUSv2 */ 261 t = atoi(bsdtar->argument); 262 if (t <= 0 || t > 8192) 263 lafe_errc(1, 0, 264 "Argument to -b is out of range (1..8192)"); 265 bsdtar->bytes_per_block = 512 * t; 266 /* Explicit -b forces last block size. */ 267 bsdtar->bytes_in_last_block = bsdtar->bytes_per_block; 268 break; 269 case OPTION_B64ENCODE: 270 if (compression2 != '\0') 271 lafe_errc(1, 0, 272 "Can't specify both --uuencode and " 273 "--b64encode"); 274 compression2 = opt; 275 compression2_name = "b64encode"; 276 break; 277 case 'C': /* GNU tar */ 278 if (strlen(bsdtar->argument) == 0) 279 lafe_errc(1, 0, 280 "Meaningless option: -C ''"); 281 282 set_chdir(bsdtar, bsdtar->argument); 283 break; 284 case 'c': /* SUSv2 */ 285 set_mode(bsdtar, opt); 286 break; 287 case OPTION_CHECK_LINKS: /* GNU tar */ 288 bsdtar->option_warn_links = 1; 289 break; 290 case OPTION_CHROOT: /* NetBSD */ 291 bsdtar->option_chroot = 1; 292 break; 293 case OPTION_CLEAR_NOCHANGE_FFLAGS: 294 bsdtar->extract_flags |= 295 ARCHIVE_EXTRACT_CLEAR_NOCHANGE_FFLAGS; 296 break; 297 case OPTION_DISABLE_COPYFILE: /* Mac OS X */ 298 bsdtar->readdisk_flags &= ~ARCHIVE_READDISK_MAC_COPYFILE; 299 break; 300 case OPTION_EXCLUDE: /* GNU tar */ 301 if (archive_match_exclude_pattern( 302 bsdtar->matching, bsdtar->argument) != ARCHIVE_OK) 303 lafe_errc(1, 0, 304 "Couldn't exclude %s\n", bsdtar->argument); 305 break; 306 case OPTION_FORMAT: /* GNU tar, others */ 307 cset_set_format(bsdtar->cset, bsdtar->argument); 308 break; 309 case 'f': /* SUSv2 */ 310 bsdtar->filename = bsdtar->argument; 311 break; 312 case OPTION_GID: /* cpio */ 313 t = atoi(bsdtar->argument); 314 if (t < 0) 315 lafe_errc(1, 0, 316 "Argument to --gid must be positive"); 317 bsdtar->gid = t; 318 break; 319 case OPTION_GNAME: /* cpio */ 320 bsdtar->gname = bsdtar->argument; 321 break; 322 case OPTION_GRZIP: 323 if (compression != '\0') 324 lafe_errc(1, 0, 325 "Can't specify both -%c and -%c", opt, 326 compression); 327 compression = opt; 328 compression_name = "grzip"; 329 break; 330 case 'H': /* BSD convention */ 331 bsdtar->symlink_mode = 'H'; 332 break; 333 case 'h': /* Linux Standards Base, gtar; synonym for -L */ 334 bsdtar->symlink_mode = 'L'; 335 /* Hack: -h by itself is the "help" command. */ 336 possible_help_request = 1; 337 break; 338 case OPTION_HELP: /* GNU tar, others */ 339 long_help(); 340 exit(0); 341 break; 342 case OPTION_HFS_COMPRESSION: /* Mac OS X v10.6 or later */ 343 bsdtar->extract_flags |= 344 ARCHIVE_EXTRACT_HFS_COMPRESSION_FORCED; 345 break; 346 case OPTION_IGNORE_ZEROS: 347 bsdtar->option_ignore_zeros = 1; 348 break; 349 case 'I': /* GNU tar */ 350 /* 351 * TODO: Allow 'names' to come from an archive, 352 * not just a text file. Design a good UI for 353 * allowing names and mode/owner to be read 354 * from an archive, with contents coming from 355 * disk. This can be used to "refresh" an 356 * archive or to design archives with special 357 * permissions without having to create those 358 * permissions on disk. 359 */ 360 bsdtar->names_from_file = bsdtar->argument; 361 break; 362 case OPTION_INCLUDE: 363 /* 364 * No one else has the @archive extension, so 365 * no one else needs this to filter entries 366 * when transforming archives. 367 */ 368 if (archive_match_include_pattern(bsdtar->matching, 369 bsdtar->argument) != ARCHIVE_OK) 370 lafe_errc(1, 0, 371 "Failed to add %s to inclusion list", 372 bsdtar->argument); 373 break; 374 case 'j': /* GNU tar */ 375 if (compression != '\0') 376 lafe_errc(1, 0, 377 "Can't specify both -%c and -%c", opt, 378 compression); 379 compression = opt; 380 compression_name = "bzip2"; 381 break; 382 case 'J': /* GNU tar 1.21 and later */ 383 if (compression != '\0') 384 lafe_errc(1, 0, 385 "Can't specify both -%c and -%c", opt, 386 compression); 387 compression = opt; 388 compression_name = "xz"; 389 break; 390 case 'k': /* GNU tar */ 391 bsdtar->extract_flags |= ARCHIVE_EXTRACT_NO_OVERWRITE; 392 break; 393 case OPTION_KEEP_NEWER_FILES: /* GNU tar */ 394 bsdtar->extract_flags |= ARCHIVE_EXTRACT_NO_OVERWRITE_NEWER; 395 break; 396 case 'L': /* BSD convention */ 397 bsdtar->symlink_mode = 'L'; 398 break; 399 case 'l': /* SUSv2 and GNU tar beginning with 1.16 */ 400 /* GNU tar 1.13 used -l for --one-file-system */ 401 bsdtar->option_warn_links = 1; 402 break; 403 case OPTION_LRZIP: 404 case OPTION_LZ4: 405 case OPTION_LZIP: /* GNU tar beginning with 1.23 */ 406 case OPTION_LZMA: /* GNU tar beginning with 1.20 */ 407 case OPTION_LZOP: /* GNU tar beginning with 1.21 */ 408 if (compression != '\0') 409 lafe_errc(1, 0, 410 "Can't specify both -%c and -%c", opt, 411 compression); 412 compression = opt; 413 switch (opt) { 414 case OPTION_LRZIP: compression_name = "lrzip"; break; 415 case OPTION_LZ4: compression_name = "lz4"; break; 416 case OPTION_LZIP: compression_name = "lzip"; break; 417 case OPTION_LZMA: compression_name = "lzma"; break; 418 case OPTION_LZOP: compression_name = "lzop"; break; 419 } 420 break; 421 case 'm': /* SUSv2 */ 422 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_TIME; 423 break; 424 case 'n': /* GNU tar */ 425 bsdtar->option_no_subdirs = 1; 426 break; 427 /* 428 * Selecting files by time: 429 * --newer-?time='date' Only files newer than 'date' 430 * --newer-?time-than='file' Only files newer than time 431 * on specified file (useful for incremental backups) 432 */ 433 case OPTION_NEWER_CTIME: /* GNU tar */ 434 if (archive_match_include_date(bsdtar->matching, 435 ARCHIVE_MATCH_CTIME | ARCHIVE_MATCH_NEWER, 436 bsdtar->argument) != ARCHIVE_OK) 437 lafe_errc(1, 0, "Error : %s", 438 archive_error_string(bsdtar->matching)); 439 break; 440 case OPTION_NEWER_CTIME_THAN: 441 if (archive_match_include_file_time(bsdtar->matching, 442 ARCHIVE_MATCH_CTIME | ARCHIVE_MATCH_NEWER, 443 bsdtar->argument) != ARCHIVE_OK) 444 lafe_errc(1, 0, "Error : %s", 445 archive_error_string(bsdtar->matching)); 446 break; 447 case OPTION_NEWER_MTIME: /* GNU tar */ 448 if (archive_match_include_date(bsdtar->matching, 449 ARCHIVE_MATCH_MTIME | ARCHIVE_MATCH_NEWER, 450 bsdtar->argument) != ARCHIVE_OK) 451 lafe_errc(1, 0, "Error : %s", 452 archive_error_string(bsdtar->matching)); 453 break; 454 case OPTION_NEWER_MTIME_THAN: 455 if (archive_match_include_file_time(bsdtar->matching, 456 ARCHIVE_MATCH_MTIME | ARCHIVE_MATCH_NEWER, 457 bsdtar->argument) != ARCHIVE_OK) 458 lafe_errc(1, 0, "Error : %s", 459 archive_error_string(bsdtar->matching)); 460 break; 461 case OPTION_NODUMP: /* star */ 462 bsdtar->readdisk_flags |= ARCHIVE_READDISK_HONOR_NODUMP; 463 break; 464 case OPTION_NOPRESERVE_HFS_COMPRESSION: 465 /* Mac OS X v10.6 or later */ 466 bsdtar->extract_flags |= 467 ARCHIVE_EXTRACT_NO_HFS_COMPRESSION; 468 break; 469 case OPTION_NO_SAME_OWNER: /* GNU tar */ 470 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_OWNER; 471 break; 472 case OPTION_NO_SAME_PERMISSIONS: /* GNU tar */ 473 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_PERM; 474 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_ACL; 475 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_XATTR; 476 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_FFLAGS; 477 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_MAC_METADATA; 478 break; 479 case OPTION_NO_XATTR: /* Issue #131 */ 480 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_XATTR; 481 bsdtar->readdisk_flags |= ARCHIVE_READDISK_NO_XATTR; 482 break; 483 case OPTION_NULL: /* GNU tar */ 484 bsdtar->option_null++; 485 break; 486 case OPTION_NUMERIC_OWNER: /* GNU tar */ 487 bsdtar->uname = ""; 488 bsdtar->gname = ""; 489 bsdtar->option_numeric_owner++; 490 break; 491 case 'O': /* GNU tar */ 492 bsdtar->option_stdout = 1; 493 break; 494 case 'o': /* SUSv2 and GNU conflict here, but not fatally */ 495 option_o = 1; /* Record it and resolve it later. */ 496 break; 497 /* 498 * Selecting files by time: 499 * --older-?time='date' Only files older than 'date' 500 * --older-?time-than='file' Only files older than time 501 * on specified file 502 */ 503 case OPTION_OLDER_CTIME: 504 if (archive_match_include_date(bsdtar->matching, 505 ARCHIVE_MATCH_CTIME | ARCHIVE_MATCH_OLDER, 506 bsdtar->argument) != ARCHIVE_OK) 507 lafe_errc(1, 0, "Error : %s", 508 archive_error_string(bsdtar->matching)); 509 break; 510 case OPTION_OLDER_CTIME_THAN: 511 if (archive_match_include_file_time(bsdtar->matching, 512 ARCHIVE_MATCH_CTIME | ARCHIVE_MATCH_OLDER, 513 bsdtar->argument) != ARCHIVE_OK) 514 lafe_errc(1, 0, "Error : %s", 515 archive_error_string(bsdtar->matching)); 516 break; 517 case OPTION_OLDER_MTIME: 518 if (archive_match_include_date(bsdtar->matching, 519 ARCHIVE_MATCH_MTIME | ARCHIVE_MATCH_OLDER, 520 bsdtar->argument) != ARCHIVE_OK) 521 lafe_errc(1, 0, "Error : %s", 522 archive_error_string(bsdtar->matching)); 523 break; 524 case OPTION_OLDER_MTIME_THAN: 525 if (archive_match_include_file_time(bsdtar->matching, 526 ARCHIVE_MATCH_MTIME | ARCHIVE_MATCH_OLDER, 527 bsdtar->argument) != ARCHIVE_OK) 528 lafe_errc(1, 0, "Error : %s", 529 archive_error_string(bsdtar->matching)); 530 break; 531 case OPTION_ONE_FILE_SYSTEM: /* GNU tar */ 532 bsdtar->readdisk_flags |= 533 ARCHIVE_READDISK_NO_TRAVERSE_MOUNTS; 534 break; 535 case OPTION_OPTIONS: 536 bsdtar->option_options = bsdtar->argument; 537 break; 538 #if 0 539 /* 540 * The common BSD -P option is not necessary, since 541 * our default is to archive symlinks, not follow 542 * them. This is convenient, as -P conflicts with GNU 543 * tar anyway. 544 */ 545 case 'P': /* BSD convention */ 546 /* Default behavior, no option necessary. */ 547 break; 548 #endif 549 case 'P': /* GNU tar */ 550 bsdtar->extract_flags &= ~SECURITY; 551 bsdtar->option_absolute_paths = 1; 552 break; 553 case 'p': /* GNU tar, star */ 554 bsdtar->extract_flags |= ARCHIVE_EXTRACT_PERM; 555 bsdtar->extract_flags |= ARCHIVE_EXTRACT_ACL; 556 bsdtar->extract_flags |= ARCHIVE_EXTRACT_XATTR; 557 bsdtar->extract_flags |= ARCHIVE_EXTRACT_FFLAGS; 558 bsdtar->extract_flags |= ARCHIVE_EXTRACT_MAC_METADATA; 559 break; 560 case OPTION_PASSPHRASE: 561 bsdtar->passphrase = bsdtar->argument; 562 break; 563 case OPTION_POSIX: /* GNU tar */ 564 cset_set_format(bsdtar->cset, "pax"); 565 break; 566 case 'q': /* FreeBSD GNU tar --fast-read, NetBSD -q */ 567 bsdtar->option_fast_read = 1; 568 break; 569 case 'r': /* SUSv2 */ 570 set_mode(bsdtar, opt); 571 break; 572 case 'S': /* NetBSD pax-as-tar */ 573 bsdtar->extract_flags |= ARCHIVE_EXTRACT_SPARSE; 574 break; 575 case 's': /* NetBSD pax-as-tar */ 576 #if defined(HAVE_REGEX_H) || defined(HAVE_PCREPOSIX_H) 577 add_substitution(bsdtar, bsdtar->argument); 578 #else 579 lafe_warnc(0, 580 "-s is not supported by this version of bsdtar"); 581 usage(); 582 #endif 583 break; 584 case OPTION_SAME_OWNER: /* GNU tar */ 585 bsdtar->extract_flags |= ARCHIVE_EXTRACT_OWNER; 586 break; 587 case OPTION_STRIP_COMPONENTS: /* GNU tar 1.15 */ 588 errno = 0; 589 bsdtar->strip_components = strtol(bsdtar->argument, 590 NULL, 0); 591 if (errno) 592 lafe_errc(1, 0, 593 "Invalid --strip-components argument: %s", 594 bsdtar->argument); 595 break; 596 case 'T': /* GNU tar */ 597 bsdtar->names_from_file = bsdtar->argument; 598 break; 599 case 't': /* SUSv2 */ 600 set_mode(bsdtar, opt); 601 bsdtar->verbose++; 602 break; 603 case OPTION_TOTALS: /* GNU tar */ 604 bsdtar->option_totals++; 605 break; 606 case 'U': /* GNU tar */ 607 bsdtar->extract_flags |= ARCHIVE_EXTRACT_UNLINK; 608 bsdtar->option_unlink_first = 1; 609 break; 610 case 'u': /* SUSv2 */ 611 set_mode(bsdtar, opt); 612 break; 613 case OPTION_UID: /* cpio */ 614 t = atoi(bsdtar->argument); 615 if (t < 0) 616 lafe_errc(1, 0, 617 "Argument to --uid must be positive"); 618 bsdtar->uid = t; 619 break; 620 case OPTION_UNAME: /* cpio */ 621 bsdtar->uname = bsdtar->argument; 622 break; 623 case OPTION_UUENCODE: 624 if (compression2 != '\0') 625 lafe_errc(1, 0, 626 "Can't specify both --uuencode and " 627 "--b64encode"); 628 compression2 = opt; 629 compression2_name = "uuencode"; 630 break; 631 case 'v': /* SUSv2 */ 632 bsdtar->verbose++; 633 break; 634 case OPTION_VERSION: /* GNU convention */ 635 version(); 636 break; 637 #if 0 638 /* 639 * The -W longopt feature is handled inside of 640 * bsdtar_getopt(), so -W is not available here. 641 */ 642 case 'W': /* Obscure GNU convention. */ 643 break; 644 #endif 645 case 'w': /* SUSv2 */ 646 bsdtar->option_interactive = 1; 647 break; 648 case 'X': /* GNU tar */ 649 if (archive_match_exclude_pattern_from_file( 650 bsdtar->matching, bsdtar->argument, 0) 651 != ARCHIVE_OK) 652 lafe_errc(1, 0, "Error : %s", 653 archive_error_string(bsdtar->matching)); 654 break; 655 case 'x': /* SUSv2 */ 656 set_mode(bsdtar, opt); 657 break; 658 case 'y': /* FreeBSD version of GNU tar */ 659 if (compression != '\0') 660 lafe_errc(1, 0, 661 "Can't specify both -%c and -%c", opt, 662 compression); 663 compression = opt; 664 compression_name = "bzip2"; 665 break; 666 case 'Z': /* GNU tar */ 667 if (compression != '\0') 668 lafe_errc(1, 0, 669 "Can't specify both -%c and -%c", opt, 670 compression); 671 compression = opt; 672 compression_name = "compress"; 673 break; 674 case 'z': /* GNU tar, star, many others */ 675 if (compression != '\0') 676 lafe_errc(1, 0, 677 "Can't specify both -%c and -%c", opt, 678 compression); 679 compression = opt; 680 compression_name = "gzip"; 681 break; 682 case OPTION_USE_COMPRESS_PROGRAM: 683 compress_program = bsdtar->argument; 684 break; 685 default: 686 usage(); 687 } 688 } 689 690 /* 691 * Sanity-check options. 692 */ 693 694 /* If no "real" mode was specified, treat -h as --help. */ 695 if ((bsdtar->mode == '\0') && possible_help_request) { 696 long_help(); 697 exit(0); 698 } 699 700 /* Otherwise, a mode is required. */ 701 if (bsdtar->mode == '\0') 702 lafe_errc(1, 0, 703 "Must specify one of -c, -r, -t, -u, -x"); 704 705 /* Check boolean options only permitted in certain modes. */ 706 if (option_a) 707 only_mode(bsdtar, "-a", "c"); 708 if (bsdtar->readdisk_flags & ARCHIVE_READDISK_NO_TRAVERSE_MOUNTS) 709 only_mode(bsdtar, "--one-file-system", "cru"); 710 if (bsdtar->option_fast_read) 711 only_mode(bsdtar, "--fast-read", "xt"); 712 if (bsdtar->extract_flags & ARCHIVE_EXTRACT_HFS_COMPRESSION_FORCED) 713 only_mode(bsdtar, "--hfsCompression", "x"); 714 if (bsdtar->extract_flags & ARCHIVE_EXTRACT_NO_HFS_COMPRESSION) 715 only_mode(bsdtar, "--nopreserveHFSCompression", "x"); 716 if (bsdtar->readdisk_flags & ARCHIVE_READDISK_HONOR_NODUMP) 717 only_mode(bsdtar, "--nodump", "cru"); 718 if (bsdtar->readdisk_flags & ARCHIVE_READDISK_NO_XATTR) 719 only_mode(bsdtar, "--no-xattr", "crux"); 720 if (option_o > 0) { 721 switch (bsdtar->mode) { 722 case 'c': 723 /* 724 * In GNU tar, -o means "old format." The 725 * "ustar" format is the closest thing 726 * supported by libarchive. 727 */ 728 cset_set_format(bsdtar->cset, "ustar"); 729 /* TODO: bsdtar->create_format = "v7"; */ 730 break; 731 case 'x': 732 /* POSIX-compatible behavior. */ 733 bsdtar->option_no_owner = 1; 734 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_OWNER; 735 break; 736 default: 737 only_mode(bsdtar, "-o", "xc"); 738 break; 739 } 740 } 741 if (bsdtar->option_no_subdirs) 742 only_mode(bsdtar, "-n", "cru"); 743 if (bsdtar->option_stdout) 744 only_mode(bsdtar, "-O", "xt"); 745 if (bsdtar->option_unlink_first) 746 only_mode(bsdtar, "-U", "x"); 747 if (bsdtar->option_warn_links) 748 only_mode(bsdtar, "--check-links", "cr"); 749 750 if (option_a && cset_auto_compress(bsdtar->cset, bsdtar->filename)) { 751 /* Ignore specified compressions if auto-compress works. */ 752 compression = '\0'; 753 compression2 = '\0'; 754 } 755 /* Check other parameters only permitted in certain modes. */ 756 if (compress_program != NULL) { 757 only_mode(bsdtar, "--use-compress-program", "cxt"); 758 cset_add_filter_program(bsdtar->cset, compress_program); 759 /* Ignore specified compressions. */ 760 compression = '\0'; 761 compression2 = '\0'; 762 } 763 if (compression != '\0') { 764 switch (compression) { 765 case 'J': case 'j': case 'y': case 'Z': case 'z': 766 strcpy(buff, "-?"); 767 buff[1] = compression; 768 break; 769 default: 770 strcpy(buff, "--"); 771 strcat(buff, compression_name); 772 break; 773 } 774 only_mode(bsdtar, buff, "cxt"); 775 cset_add_filter(bsdtar->cset, compression_name); 776 } 777 if (compression2 != '\0') { 778 strcpy(buff, "--"); 779 strcat(buff, compression2_name); 780 only_mode(bsdtar, buff, "cxt"); 781 cset_add_filter(bsdtar->cset, compression2_name); 782 } 783 if (cset_get_format(bsdtar->cset) != NULL) 784 only_mode(bsdtar, "--format", "cru"); 785 if (bsdtar->symlink_mode != '\0') { 786 strcpy(buff, "-?"); 787 buff[1] = bsdtar->symlink_mode; 788 only_mode(bsdtar, buff, "cru"); 789 } 790 791 /* Filename "-" implies stdio. */ 792 if (strcmp(bsdtar->filename, "-") == 0) 793 bsdtar->filename = NULL; 794 795 switch(bsdtar->mode) { 796 case 'c': 797 tar_mode_c(bsdtar); 798 break; 799 case 'r': 800 tar_mode_r(bsdtar); 801 break; 802 case 't': 803 tar_mode_t(bsdtar); 804 break; 805 case 'u': 806 tar_mode_u(bsdtar); 807 break; 808 case 'x': 809 tar_mode_x(bsdtar); 810 break; 811 } 812 813 archive_match_free(bsdtar->matching); 814 #if defined(HAVE_REGEX_H) || defined(HAVE_PCREPOSIX_H) 815 cleanup_substitution(bsdtar); 816 #endif 817 cset_free(bsdtar->cset); 818 passphrase_free(bsdtar->ppbuff); 819 820 if (bsdtar->return_value != 0) 821 lafe_warnc(0, 822 "Error exit delayed from previous errors."); 823 return (bsdtar->return_value); 824 } 825 826 static void 827 set_mode(struct bsdtar *bsdtar, char opt) 828 { 829 if (bsdtar->mode != '\0' && bsdtar->mode != opt) 830 lafe_errc(1, 0, 831 "Can't specify both -%c and -%c", opt, bsdtar->mode); 832 bsdtar->mode = opt; 833 } 834 835 /* 836 * Verify that the mode is correct. 837 */ 838 static void 839 only_mode(struct bsdtar *bsdtar, const char *opt, const char *valid_modes) 840 { 841 if (strchr(valid_modes, bsdtar->mode) == NULL) 842 lafe_errc(1, 0, 843 "Option %s is not permitted in mode -%c", 844 opt, bsdtar->mode); 845 } 846 847 848 void 849 usage(void) 850 { 851 const char *p; 852 853 p = lafe_getprogname(); 854 855 fprintf(stderr, "Usage:\n"); 856 fprintf(stderr, " List: %s -tf <archive-filename>\n", p); 857 fprintf(stderr, " Extract: %s -xf <archive-filename>\n", p); 858 fprintf(stderr, " Create: %s -cf <archive-filename> [filenames...]\n", p); 859 fprintf(stderr, " Help: %s --help\n", p); 860 exit(1); 861 } 862 863 static void 864 version(void) 865 { 866 printf("bsdtar %s - %s\n", 867 BSDTAR_VERSION_STRING, 868 archive_version_details()); 869 exit(0); 870 } 871 872 static const char *long_help_msg = 873 "First option must be a mode specifier:\n" 874 " -c Create -r Add/Replace -t List -u Update -x Extract\n" 875 "Common Options:\n" 876 " -b # Use # 512-byte records per I/O block\n" 877 " -f <filename> Location of archive (default " _PATH_DEFTAPE ")\n" 878 " -v Verbose\n" 879 " -w Interactive\n" 880 "Create: %p -c [options] [<file> | <dir> | @<archive> | -C <dir> ]\n" 881 " <file>, <dir> add these items to archive\n" 882 " -z, -j, -J, --lzma Compress archive with gzip/bzip2/xz/lzma\n" 883 " --format {ustar|pax|cpio|shar} Select archive format\n" 884 " --exclude <pattern> Skip files that match pattern\n" 885 " -C <dir> Change to <dir> before processing remaining files\n" 886 " @<archive> Add entries from <archive> to output\n" 887 "List: %p -t [options] [<patterns>]\n" 888 " <patterns> If specified, list only entries that match\n" 889 "Extract: %p -x [options] [<patterns>]\n" 890 " <patterns> If specified, extract only entries that match\n" 891 " -k Keep (don't overwrite) existing files\n" 892 " -m Don't restore modification times\n" 893 " -O Write entries to stdout, don't restore to disk\n" 894 " -p Restore permissions (including ACLs, owner, file flags)\n"; 895 896 897 /* 898 * Note that the word 'bsdtar' will always appear in the first line 899 * of output. 900 * 901 * In particular, /bin/sh scripts that need to test for the presence 902 * of bsdtar can use the following template: 903 * 904 * if (tar --help 2>&1 | grep bsdtar >/dev/null 2>&1 ) then \ 905 * echo bsdtar; else echo not bsdtar; fi 906 */ 907 static void 908 long_help(void) 909 { 910 const char *prog; 911 const char *p; 912 913 prog = lafe_getprogname(); 914 915 fflush(stderr); 916 917 p = (strcmp(prog,"bsdtar") != 0) ? "(bsdtar)" : ""; 918 printf("%s%s: manipulate archive files\n", prog, p); 919 920 for (p = long_help_msg; *p != '\0'; p++) { 921 if (*p == '%') { 922 if (p[1] == 'p') { 923 fputs(prog, stdout); 924 p++; 925 } else 926 putchar('%'); 927 } else 928 putchar(*p); 929 } 930 version(); 931 } 932