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 180 181 182 /* Need lafe_progname before calling lafe_warnc. */ 183 if (*argv == NULL) 184 lafe_progname = "bsdtar"; 185 else { 186 #if defined(_WIN32) && !defined(__CYGWIN__) 187 lafe_progname = strrchr(*argv, '\\'); 188 if (strrchr(*argv, '/') > lafe_progname) 189 #endif 190 lafe_progname = strrchr(*argv, '/'); 191 if (lafe_progname != NULL) 192 lafe_progname++; 193 else 194 lafe_progname = *argv; 195 } 196 197 #if HAVE_SETLOCALE 198 if (setlocale(LC_ALL, "") == NULL) 199 lafe_warnc(0, "Failed to set default locale"); 200 #endif 201 #if defined(HAVE_NL_LANGINFO) && defined(HAVE_D_MD_ORDER) 202 bsdtar->day_first = (*nl_langinfo(D_MD_ORDER) == 'd'); 203 #endif 204 possible_help_request = 0; 205 206 /* Look up uid of current user for future reference */ 207 bsdtar->user_uid = geteuid(); 208 209 /* Default: open tape drive. */ 210 bsdtar->filename = getenv("TAPE"); 211 if (bsdtar->filename == NULL) 212 bsdtar->filename = _PATH_DEFTAPE; 213 214 /* Default block size settings. */ 215 bsdtar->bytes_per_block = DEFAULT_BYTES_PER_BLOCK; 216 /* Allow library to default this unless user specifies -b. */ 217 bsdtar->bytes_in_last_block = -1; 218 219 /* Default: preserve mod time on extract */ 220 bsdtar->extract_flags = ARCHIVE_EXTRACT_TIME; 221 222 /* Default: Perform basic security checks. */ 223 bsdtar->extract_flags |= SECURITY; 224 225 #ifndef _WIN32 226 /* On POSIX systems, assume --same-owner and -p when run by 227 * the root user. This doesn't make any sense on Windows. */ 228 if (bsdtar->user_uid == 0) { 229 /* --same-owner */ 230 bsdtar->extract_flags |= ARCHIVE_EXTRACT_OWNER; 231 /* -p */ 232 bsdtar->extract_flags |= ARCHIVE_EXTRACT_PERM; 233 bsdtar->extract_flags |= ARCHIVE_EXTRACT_ACL; 234 bsdtar->extract_flags |= ARCHIVE_EXTRACT_XATTR; 235 bsdtar->extract_flags |= ARCHIVE_EXTRACT_FFLAGS; 236 bsdtar->extract_flags |= ARCHIVE_EXTRACT_MAC_METADATA; 237 } 238 #endif 239 240 /* 241 * Enable Mac OS "copyfile()" extension by default. 242 * This has no effect on other platforms. 243 */ 244 bsdtar->readdisk_flags |= ARCHIVE_READDISK_MAC_COPYFILE; 245 #ifdef COPYFILE_DISABLE_VAR 246 if (getenv(COPYFILE_DISABLE_VAR)) 247 bsdtar->readdisk_flags &= ~ARCHIVE_READDISK_MAC_COPYFILE; 248 #endif 249 bsdtar->matching = archive_match_new(); 250 if (bsdtar->matching == NULL) 251 lafe_errc(1, errno, "Out of memory"); 252 bsdtar->cset = cset_new(); 253 if (bsdtar->cset == NULL) 254 lafe_errc(1, errno, "Out of memory"); 255 256 bsdtar->argv = argv; 257 bsdtar->argc = argc; 258 259 /* 260 * Comments following each option indicate where that option 261 * originated: SUSv2, POSIX, GNU tar, star, etc. If there's 262 * no such comment, then I don't know of anyone else who 263 * implements that option. 264 */ 265 while ((opt = bsdtar_getopt(bsdtar)) != -1) { 266 switch (opt) { 267 case 'a': /* GNU tar */ 268 option_a = 1; /* Record it and resolve it later. */ 269 break; 270 case 'B': /* GNU tar */ 271 /* libarchive doesn't need this; just ignore it. */ 272 break; 273 case 'b': /* SUSv2 */ 274 t = atoi(bsdtar->argument); 275 if (t <= 0 || t > 8192) 276 lafe_errc(1, 0, 277 "Argument to -b is out of range (1..8192)"); 278 bsdtar->bytes_per_block = 512 * t; 279 /* Explicit -b forces last block size. */ 280 bsdtar->bytes_in_last_block = bsdtar->bytes_per_block; 281 break; 282 case OPTION_B64ENCODE: 283 if (compression2 != '\0') 284 lafe_errc(1, 0, 285 "Can't specify both --uuencode and " 286 "--b64encode"); 287 compression2 = opt; 288 compression2_name = "b64encode"; 289 break; 290 case 'C': /* GNU tar */ 291 if (strlen(bsdtar->argument) == 0) 292 lafe_errc(1, 0, 293 "Meaningless option: -C ''"); 294 295 set_chdir(bsdtar, bsdtar->argument); 296 break; 297 case 'c': /* SUSv2 */ 298 set_mode(bsdtar, opt); 299 break; 300 case OPTION_CHECK_LINKS: /* GNU tar */ 301 bsdtar->option_warn_links = 1; 302 break; 303 case OPTION_CHROOT: /* NetBSD */ 304 bsdtar->option_chroot = 1; 305 break; 306 case OPTION_DISABLE_COPYFILE: /* Mac OS X */ 307 bsdtar->readdisk_flags &= ~ARCHIVE_READDISK_MAC_COPYFILE; 308 break; 309 case OPTION_EXCLUDE: /* GNU tar */ 310 if (archive_match_exclude_pattern( 311 bsdtar->matching, bsdtar->argument) != ARCHIVE_OK) 312 lafe_errc(1, 0, 313 "Couldn't exclude %s\n", bsdtar->argument); 314 break; 315 case OPTION_FORMAT: /* GNU tar, others */ 316 cset_set_format(bsdtar->cset, bsdtar->argument); 317 break; 318 case 'f': /* SUSv2 */ 319 bsdtar->filename = bsdtar->argument; 320 break; 321 case OPTION_GID: /* cpio */ 322 t = atoi(bsdtar->argument); 323 if (t < 0) 324 lafe_errc(1, 0, 325 "Argument to --gid must be positive"); 326 bsdtar->gid = t; 327 break; 328 case OPTION_GNAME: /* cpio */ 329 bsdtar->gname = bsdtar->argument; 330 break; 331 case OPTION_GRZIP: 332 if (compression != '\0') 333 lafe_errc(1, 0, 334 "Can't specify both -%c and -%c", opt, 335 compression); 336 compression = opt; 337 compression_name = "grzip"; 338 break; 339 case 'H': /* BSD convention */ 340 bsdtar->symlink_mode = 'H'; 341 break; 342 case 'h': /* Linux Standards Base, gtar; synonym for -L */ 343 bsdtar->symlink_mode = 'L'; 344 /* Hack: -h by itself is the "help" command. */ 345 possible_help_request = 1; 346 break; 347 case OPTION_HELP: /* GNU tar, others */ 348 long_help(); 349 exit(0); 350 break; 351 case OPTION_HFS_COMPRESSION: /* Mac OS X v10.6 or later */ 352 bsdtar->extract_flags |= 353 ARCHIVE_EXTRACT_HFS_COMPRESSION_FORCED; 354 break; 355 case 'I': /* GNU tar */ 356 /* 357 * TODO: Allow 'names' to come from an archive, 358 * not just a text file. Design a good UI for 359 * allowing names and mode/owner to be read 360 * from an archive, with contents coming from 361 * disk. This can be used to "refresh" an 362 * archive or to design archives with special 363 * permissions without having to create those 364 * permissions on disk. 365 */ 366 bsdtar->names_from_file = bsdtar->argument; 367 break; 368 case OPTION_INCLUDE: 369 /* 370 * No one else has the @archive extension, so 371 * no one else needs this to filter entries 372 * when transforming archives. 373 */ 374 if (archive_match_include_pattern(bsdtar->matching, 375 bsdtar->argument) != ARCHIVE_OK) 376 lafe_errc(1, 0, 377 "Failed to add %s to inclusion list", 378 bsdtar->argument); 379 break; 380 case 'j': /* GNU tar */ 381 if (compression != '\0') 382 lafe_errc(1, 0, 383 "Can't specify both -%c and -%c", opt, 384 compression); 385 compression = opt; 386 compression_name = "bzip2"; 387 break; 388 case 'J': /* GNU tar 1.21 and later */ 389 if (compression != '\0') 390 lafe_errc(1, 0, 391 "Can't specify both -%c and -%c", opt, 392 compression); 393 compression = opt; 394 compression_name = "xz"; 395 break; 396 case 'k': /* GNU tar */ 397 bsdtar->extract_flags |= ARCHIVE_EXTRACT_NO_OVERWRITE; 398 break; 399 case OPTION_KEEP_NEWER_FILES: /* GNU tar */ 400 bsdtar->extract_flags |= ARCHIVE_EXTRACT_NO_OVERWRITE_NEWER; 401 break; 402 case 'L': /* BSD convention */ 403 bsdtar->symlink_mode = 'L'; 404 break; 405 case 'l': /* SUSv2 and GNU tar beginning with 1.16 */ 406 /* GNU tar 1.13 used -l for --one-file-system */ 407 bsdtar->option_warn_links = 1; 408 break; 409 case OPTION_LRZIP: 410 case OPTION_LZIP: /* GNU tar beginning with 1.23 */ 411 case OPTION_LZMA: /* GNU tar beginning with 1.20 */ 412 case OPTION_LZOP: /* GNU tar beginning with 1.21 */ 413 if (compression != '\0') 414 lafe_errc(1, 0, 415 "Can't specify both -%c and -%c", opt, 416 compression); 417 compression = opt; 418 switch (opt) { 419 case OPTION_LRZIP: compression_name = "lrzip"; break; 420 case OPTION_LZIP: compression_name = "lzip"; break; 421 case OPTION_LZMA: compression_name = "lzma"; break; 422 case OPTION_LZOP: compression_name = "lzop"; break; 423 } 424 break; 425 case 'm': /* SUSv2 */ 426 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_TIME; 427 break; 428 case 'n': /* GNU tar */ 429 bsdtar->option_no_subdirs = 1; 430 break; 431 /* 432 * Selecting files by time: 433 * --newer-?time='date' Only files newer than 'date' 434 * --newer-?time-than='file' Only files newer than time 435 * on specified file (useful for incremental backups) 436 */ 437 case OPTION_NEWER_CTIME: /* GNU tar */ 438 if (archive_match_include_date(bsdtar->matching, 439 ARCHIVE_MATCH_CTIME | ARCHIVE_MATCH_NEWER, 440 bsdtar->argument) != ARCHIVE_OK) 441 lafe_errc(1, 0, "Error : %s", 442 archive_error_string(bsdtar->matching)); 443 break; 444 case OPTION_NEWER_CTIME_THAN: 445 if (archive_match_include_file_time(bsdtar->matching, 446 ARCHIVE_MATCH_CTIME | ARCHIVE_MATCH_NEWER, 447 bsdtar->argument) != ARCHIVE_OK) 448 lafe_errc(1, 0, "Error : %s", 449 archive_error_string(bsdtar->matching)); 450 break; 451 case OPTION_NEWER_MTIME: /* GNU tar */ 452 if (archive_match_include_date(bsdtar->matching, 453 ARCHIVE_MATCH_MTIME | ARCHIVE_MATCH_NEWER, 454 bsdtar->argument) != ARCHIVE_OK) 455 lafe_errc(1, 0, "Error : %s", 456 archive_error_string(bsdtar->matching)); 457 break; 458 case OPTION_NEWER_MTIME_THAN: 459 if (archive_match_include_file_time(bsdtar->matching, 460 ARCHIVE_MATCH_MTIME | ARCHIVE_MATCH_NEWER, 461 bsdtar->argument) != ARCHIVE_OK) 462 lafe_errc(1, 0, "Error : %s", 463 archive_error_string(bsdtar->matching)); 464 break; 465 case OPTION_NODUMP: /* star */ 466 bsdtar->readdisk_flags |= ARCHIVE_READDISK_HONOR_NODUMP; 467 break; 468 case OPTION_NOPRESERVE_HFS_COMPRESSION: 469 /* Mac OS X v10.6 or later */ 470 bsdtar->extract_flags |= 471 ARCHIVE_EXTRACT_NO_HFS_COMPRESSION; 472 break; 473 case OPTION_NO_SAME_OWNER: /* GNU tar */ 474 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_OWNER; 475 break; 476 case OPTION_NO_SAME_PERMISSIONS: /* GNU tar */ 477 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_PERM; 478 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_ACL; 479 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_XATTR; 480 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_FFLAGS; 481 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_MAC_METADATA; 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_POSIX: /* GNU tar */ 561 cset_set_format(bsdtar->cset, "pax"); 562 break; 563 case 'q': /* FreeBSD GNU tar --fast-read, NetBSD -q */ 564 bsdtar->option_fast_read = 1; 565 break; 566 case 'r': /* SUSv2 */ 567 set_mode(bsdtar, opt); 568 break; 569 case 'S': /* NetBSD pax-as-tar */ 570 bsdtar->extract_flags |= ARCHIVE_EXTRACT_SPARSE; 571 break; 572 case 's': /* NetBSD pax-as-tar */ 573 #if defined(HAVE_REGEX_H) || defined(HAVE_PCREPOSIX_H) 574 add_substitution(bsdtar, bsdtar->argument); 575 #else 576 lafe_warnc(0, 577 "-s is not supported by this version of bsdtar"); 578 usage(); 579 #endif 580 break; 581 case OPTION_SAME_OWNER: /* GNU tar */ 582 bsdtar->extract_flags |= ARCHIVE_EXTRACT_OWNER; 583 break; 584 case OPTION_STRIP_COMPONENTS: /* GNU tar 1.15 */ 585 errno = 0; 586 bsdtar->strip_components = strtol(bsdtar->argument, 587 NULL, 0); 588 if (errno) 589 lafe_errc(1, 0, 590 "Invalid --strip-components argument: %s", 591 bsdtar->argument); 592 break; 593 case 'T': /* GNU tar */ 594 bsdtar->names_from_file = bsdtar->argument; 595 break; 596 case 't': /* SUSv2 */ 597 set_mode(bsdtar, opt); 598 bsdtar->verbose++; 599 break; 600 case OPTION_TOTALS: /* GNU tar */ 601 bsdtar->option_totals++; 602 break; 603 case 'U': /* GNU tar */ 604 bsdtar->extract_flags |= ARCHIVE_EXTRACT_UNLINK; 605 bsdtar->option_unlink_first = 1; 606 break; 607 case 'u': /* SUSv2 */ 608 set_mode(bsdtar, opt); 609 break; 610 case OPTION_UID: /* cpio */ 611 t = atoi(bsdtar->argument); 612 if (t < 0) 613 lafe_errc(1, 0, 614 "Argument to --uid must be positive"); 615 bsdtar->uid = t; 616 break; 617 case OPTION_UNAME: /* cpio */ 618 bsdtar->uname = bsdtar->argument; 619 break; 620 case OPTION_UUENCODE: 621 if (compression2 != '\0') 622 lafe_errc(1, 0, 623 "Can't specify both --uuencode and " 624 "--b64encode"); 625 compression2 = opt; 626 compression2_name = "uuencode"; 627 break; 628 case 'v': /* SUSv2 */ 629 bsdtar->verbose++; 630 break; 631 case OPTION_VERSION: /* GNU convention */ 632 version(); 633 break; 634 #if 0 635 /* 636 * The -W longopt feature is handled inside of 637 * bsdtar_getopt(), so -W is not available here. 638 */ 639 case 'W': /* Obscure GNU convention. */ 640 break; 641 #endif 642 case 'w': /* SUSv2 */ 643 bsdtar->option_interactive = 1; 644 break; 645 case 'X': /* GNU tar */ 646 if (archive_match_exclude_pattern_from_file( 647 bsdtar->matching, bsdtar->argument, 0) 648 != ARCHIVE_OK) 649 lafe_errc(1, 0, "Error : %s", 650 archive_error_string(bsdtar->matching)); 651 break; 652 case 'x': /* SUSv2 */ 653 set_mode(bsdtar, opt); 654 break; 655 case 'y': /* FreeBSD version of GNU tar */ 656 if (compression != '\0') 657 lafe_errc(1, 0, 658 "Can't specify both -%c and -%c", opt, 659 compression); 660 compression = opt; 661 compression_name = "bzip2"; 662 break; 663 case 'Z': /* GNU tar */ 664 if (compression != '\0') 665 lafe_errc(1, 0, 666 "Can't specify both -%c and -%c", opt, 667 compression); 668 compression = opt; 669 compression_name = "compress"; 670 break; 671 case 'z': /* GNU tar, star, many others */ 672 if (compression != '\0') 673 lafe_errc(1, 0, 674 "Can't specify both -%c and -%c", opt, 675 compression); 676 compression = opt; 677 compression_name = "gzip"; 678 break; 679 case OPTION_USE_COMPRESS_PROGRAM: 680 compress_program = bsdtar->argument; 681 break; 682 default: 683 usage(); 684 } 685 } 686 687 /* 688 * Sanity-check options. 689 */ 690 691 /* If no "real" mode was specified, treat -h as --help. */ 692 if ((bsdtar->mode == '\0') && possible_help_request) { 693 long_help(); 694 exit(0); 695 } 696 697 /* Otherwise, a mode is required. */ 698 if (bsdtar->mode == '\0') 699 lafe_errc(1, 0, 700 "Must specify one of -c, -r, -t, -u, -x"); 701 702 /* Check boolean options only permitted in certain modes. */ 703 if (option_a) 704 only_mode(bsdtar, "-a", "c"); 705 if (bsdtar->readdisk_flags & ARCHIVE_READDISK_NO_TRAVERSE_MOUNTS) 706 only_mode(bsdtar, "--one-file-system", "cru"); 707 if (bsdtar->option_fast_read) 708 only_mode(bsdtar, "--fast-read", "xt"); 709 if (bsdtar->extract_flags & ARCHIVE_EXTRACT_HFS_COMPRESSION_FORCED) 710 only_mode(bsdtar, "--hfsCompression", "x"); 711 if (bsdtar->extract_flags & ARCHIVE_EXTRACT_NO_HFS_COMPRESSION) 712 only_mode(bsdtar, "--nopreserveHFSCompression", "x"); 713 if (bsdtar->readdisk_flags & ARCHIVE_READDISK_HONOR_NODUMP) 714 only_mode(bsdtar, "--nodump", "cru"); 715 if (option_o > 0) { 716 switch (bsdtar->mode) { 717 case 'c': 718 /* 719 * In GNU tar, -o means "old format." The 720 * "ustar" format is the closest thing 721 * supported by libarchive. 722 */ 723 cset_set_format(bsdtar->cset, "ustar"); 724 /* TODO: bsdtar->create_format = "v7"; */ 725 break; 726 case 'x': 727 /* POSIX-compatible behavior. */ 728 bsdtar->option_no_owner = 1; 729 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_OWNER; 730 break; 731 default: 732 only_mode(bsdtar, "-o", "xc"); 733 break; 734 } 735 } 736 if (bsdtar->option_no_subdirs) 737 only_mode(bsdtar, "-n", "cru"); 738 if (bsdtar->option_stdout) 739 only_mode(bsdtar, "-O", "xt"); 740 if (bsdtar->option_unlink_first) 741 only_mode(bsdtar, "-U", "x"); 742 if (bsdtar->option_warn_links) 743 only_mode(bsdtar, "--check-links", "cr"); 744 745 if (option_a && cset_auto_compress(bsdtar->cset, bsdtar->filename)) { 746 /* Ignore specified compressions if auto-compress works. */ 747 compression = '\0'; 748 compression2 = '\0'; 749 } 750 /* Check other parameters only permitted in certain modes. */ 751 if (compress_program != NULL) { 752 only_mode(bsdtar, "--use-compress-program", "cxt"); 753 cset_add_filter_program(bsdtar->cset, compress_program); 754 /* Ignore specified compressions. */ 755 compression = '\0'; 756 compression2 = '\0'; 757 } 758 if (compression != '\0') { 759 switch (compression) { 760 case 'J': case 'j': case 'y': case 'Z': case 'z': 761 strcpy(buff, "-?"); 762 buff[1] = compression; 763 break; 764 default: 765 strcpy(buff, "--"); 766 strcat(buff, compression_name); 767 break; 768 } 769 only_mode(bsdtar, buff, "cxt"); 770 cset_add_filter(bsdtar->cset, compression_name); 771 } 772 if (compression2 != '\0') { 773 strcpy(buff, "--"); 774 strcat(buff, compression2_name); 775 only_mode(bsdtar, buff, "cxt"); 776 cset_add_filter(bsdtar->cset, compression2_name); 777 } 778 if (cset_get_format(bsdtar->cset) != NULL) 779 only_mode(bsdtar, "--format", "cru"); 780 if (bsdtar->symlink_mode != '\0') { 781 strcpy(buff, "-?"); 782 buff[1] = bsdtar->symlink_mode; 783 only_mode(bsdtar, buff, "cru"); 784 } 785 786 /* Filename "-" implies stdio. */ 787 if (strcmp(bsdtar->filename, "-") == 0) 788 bsdtar->filename = NULL; 789 790 switch(bsdtar->mode) { 791 case 'c': 792 tar_mode_c(bsdtar); 793 break; 794 case 'r': 795 tar_mode_r(bsdtar); 796 break; 797 case 't': 798 tar_mode_t(bsdtar); 799 break; 800 case 'u': 801 tar_mode_u(bsdtar); 802 break; 803 case 'x': 804 tar_mode_x(bsdtar); 805 break; 806 } 807 808 archive_match_free(bsdtar->matching); 809 #if defined(HAVE_REGEX_H) || defined(HAVE_PCREPOSIX_H) 810 cleanup_substitution(bsdtar); 811 #endif 812 cset_free(bsdtar->cset); 813 814 if (bsdtar->return_value != 0) 815 lafe_warnc(0, 816 "Error exit delayed from previous errors."); 817 return (bsdtar->return_value); 818 } 819 820 static void 821 set_mode(struct bsdtar *bsdtar, char opt) 822 { 823 if (bsdtar->mode != '\0' && bsdtar->mode != opt) 824 lafe_errc(1, 0, 825 "Can't specify both -%c and -%c", opt, bsdtar->mode); 826 bsdtar->mode = opt; 827 } 828 829 /* 830 * Verify that the mode is correct. 831 */ 832 static void 833 only_mode(struct bsdtar *bsdtar, const char *opt, const char *valid_modes) 834 { 835 if (strchr(valid_modes, bsdtar->mode) == NULL) 836 lafe_errc(1, 0, 837 "Option %s is not permitted in mode -%c", 838 opt, bsdtar->mode); 839 } 840 841 842 void 843 usage(void) 844 { 845 const char *p; 846 847 p = lafe_progname; 848 849 fprintf(stderr, "Usage:\n"); 850 fprintf(stderr, " List: %s -tf <archive-filename>\n", p); 851 fprintf(stderr, " Extract: %s -xf <archive-filename>\n", p); 852 fprintf(stderr, " Create: %s -cf <archive-filename> [filenames...]\n", p); 853 fprintf(stderr, " Help: %s --help\n", p); 854 exit(1); 855 } 856 857 static void 858 version(void) 859 { 860 printf("bsdtar %s - %s\n", 861 BSDTAR_VERSION_STRING, 862 archive_version_string()); 863 exit(0); 864 } 865 866 static const char *long_help_msg = 867 "First option must be a mode specifier:\n" 868 " -c Create -r Add/Replace -t List -u Update -x Extract\n" 869 "Common Options:\n" 870 " -b # Use # 512-byte records per I/O block\n" 871 " -f <filename> Location of archive (default " _PATH_DEFTAPE ")\n" 872 " -v Verbose\n" 873 " -w Interactive\n" 874 "Create: %p -c [options] [<file> | <dir> | @<archive> | -C <dir> ]\n" 875 " <file>, <dir> add these items to archive\n" 876 " -z, -j, -J, --lzma Compress archive with gzip/bzip2/xz/lzma\n" 877 " --format {ustar|pax|cpio|shar} Select archive format\n" 878 " --exclude <pattern> Skip files that match pattern\n" 879 " -C <dir> Change to <dir> before processing remaining files\n" 880 " @<archive> Add entries from <archive> to output\n" 881 "List: %p -t [options] [<patterns>]\n" 882 " <patterns> If specified, list only entries that match\n" 883 "Extract: %p -x [options] [<patterns>]\n" 884 " <patterns> If specified, extract only entries that match\n" 885 " -k Keep (don't overwrite) existing files\n" 886 " -m Don't restore modification times\n" 887 " -O Write entries to stdout, don't restore to disk\n" 888 " -p Restore permissions (including ACLs, owner, file flags)\n"; 889 890 891 /* 892 * Note that the word 'bsdtar' will always appear in the first line 893 * of output. 894 * 895 * In particular, /bin/sh scripts that need to test for the presence 896 * of bsdtar can use the following template: 897 * 898 * if (tar --help 2>&1 | grep bsdtar >/dev/null 2>&1 ) then \ 899 * echo bsdtar; else echo not bsdtar; fi 900 */ 901 static void 902 long_help(void) 903 { 904 const char *prog; 905 const char *p; 906 907 prog = lafe_progname; 908 909 fflush(stderr); 910 911 p = (strcmp(prog,"bsdtar") != 0) ? "(bsdtar)" : ""; 912 printf("%s%s: manipulate archive files\n", prog, p); 913 914 for (p = long_help_msg; *p != '\0'; p++) { 915 if (*p == '%') { 916 if (p[1] == 'p') { 917 fputs(prog, stdout); 918 p++; 919 } else 920 putchar('%'); 921 } else 922 putchar(*p); 923 } 924 version(); 925 } 926