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 option_o; 138 char possible_help_request; 139 char buff[16]; 140 141 /* 142 * Use a pointer for consistency, but stack-allocated storage 143 * for ease of cleanup. 144 */ 145 bsdtar = &bsdtar_storage; 146 memset(bsdtar, 0, sizeof(*bsdtar)); 147 bsdtar->fd = -1; /* Mark as "unused" */ 148 bsdtar->gid = -1; 149 bsdtar->uid = -1; 150 option_o = 0; 151 152 #if defined(HAVE_SIGACTION) 153 { /* Set up signal handling. */ 154 struct sigaction sa; 155 sa.sa_handler = siginfo_handler; 156 sigemptyset(&sa.sa_mask); 157 sa.sa_flags = 0; 158 #ifdef SIGINFO 159 if (sigaction(SIGINFO, &sa, NULL)) 160 lafe_errc(1, errno, "sigaction(SIGINFO) failed"); 161 #endif 162 #ifdef SIGUSR1 163 /* ... and treat SIGUSR1 the same way as SIGINFO. */ 164 if (sigaction(SIGUSR1, &sa, NULL)) 165 lafe_errc(1, errno, "sigaction(SIGUSR1) failed"); 166 #endif 167 #ifdef SIGPIPE 168 /* Ignore SIGPIPE signals. */ 169 sa.sa_handler = SIG_IGN; 170 sigaction(SIGPIPE, &sa, NULL); 171 #endif 172 } 173 #endif 174 175 176 /* Need lafe_progname before calling lafe_warnc. */ 177 if (*argv == NULL) 178 lafe_progname = "bsdtar"; 179 else { 180 #if defined(_WIN32) && !defined(__CYGWIN__) 181 lafe_progname = strrchr(*argv, '\\'); 182 if (strrchr(*argv, '/') > lafe_progname) 183 #endif 184 lafe_progname = strrchr(*argv, '/'); 185 if (lafe_progname != NULL) 186 lafe_progname++; 187 else 188 lafe_progname = *argv; 189 } 190 191 #if HAVE_SETLOCALE 192 if (setlocale(LC_ALL, "") == NULL) 193 lafe_warnc(0, "Failed to set default locale"); 194 #endif 195 #if defined(HAVE_NL_LANGINFO) && defined(HAVE_D_MD_ORDER) 196 bsdtar->day_first = (*nl_langinfo(D_MD_ORDER) == 'd'); 197 #endif 198 possible_help_request = 0; 199 200 /* Look up uid of current user for future reference */ 201 bsdtar->user_uid = geteuid(); 202 203 /* Default: open tape drive. */ 204 bsdtar->filename = getenv("TAPE"); 205 if (bsdtar->filename == NULL) 206 bsdtar->filename = _PATH_DEFTAPE; 207 208 /* Default block size settings. */ 209 bsdtar->bytes_per_block = DEFAULT_BYTES_PER_BLOCK; 210 /* Allow library to default this unless user specifies -b. */ 211 bsdtar->bytes_in_last_block = -1; 212 213 /* Default: preserve mod time on extract */ 214 bsdtar->extract_flags = ARCHIVE_EXTRACT_TIME; 215 216 /* Default: Perform basic security checks. */ 217 bsdtar->extract_flags |= SECURITY; 218 219 #ifndef _WIN32 220 /* On POSIX systems, assume --same-owner and -p when run by 221 * the root user. This doesn't make any sense on Windows. */ 222 if (bsdtar->user_uid == 0) { 223 /* --same-owner */ 224 bsdtar->extract_flags |= ARCHIVE_EXTRACT_OWNER; 225 /* -p */ 226 bsdtar->extract_flags |= ARCHIVE_EXTRACT_PERM; 227 bsdtar->extract_flags |= ARCHIVE_EXTRACT_ACL; 228 bsdtar->extract_flags |= ARCHIVE_EXTRACT_XATTR; 229 bsdtar->extract_flags |= ARCHIVE_EXTRACT_FFLAGS; 230 bsdtar->extract_flags |= ARCHIVE_EXTRACT_MAC_METADATA; 231 } 232 #endif 233 234 /* 235 * Enable Mac OS "copyfile()" extension by default. 236 * This has no effect on other platforms. 237 */ 238 bsdtar->readdisk_flags |= ARCHIVE_READDISK_MAC_COPYFILE; 239 #ifdef COPYFILE_DISABLE_VAR 240 if (getenv(COPYFILE_DISABLE_VAR)) 241 bsdtar->readdisk_flags &= ~ARCHIVE_READDISK_MAC_COPYFILE; 242 #endif 243 bsdtar->matching = archive_match_new(); 244 if (bsdtar->matching == NULL) 245 lafe_errc(1, errno, "Out of memory"); 246 247 bsdtar->argv = argv; 248 bsdtar->argc = argc; 249 250 /* 251 * Comments following each option indicate where that option 252 * originated: SUSv2, POSIX, GNU tar, star, etc. If there's 253 * no such comment, then I don't know of anyone else who 254 * implements that option. 255 */ 256 while ((opt = bsdtar_getopt(bsdtar)) != -1) { 257 switch (opt) { 258 case 'B': /* GNU tar */ 259 /* libarchive doesn't need this; just ignore it. */ 260 break; 261 case 'b': /* SUSv2 */ 262 t = atoi(bsdtar->argument); 263 if (t <= 0 || t > 8192) 264 lafe_errc(1, 0, 265 "Argument to -b is out of range (1..8192)"); 266 bsdtar->bytes_per_block = 512 * t; 267 /* Explicit -b forces last block size. */ 268 bsdtar->bytes_in_last_block = bsdtar->bytes_per_block; 269 break; 270 case 'C': /* GNU tar */ 271 if (strlen(bsdtar->argument) == 0) 272 lafe_errc(1, 0, 273 "Meaningless option: -C ''"); 274 275 set_chdir(bsdtar, bsdtar->argument); 276 break; 277 case 'c': /* SUSv2 */ 278 set_mode(bsdtar, opt); 279 break; 280 case OPTION_CHECK_LINKS: /* GNU tar */ 281 bsdtar->option_warn_links = 1; 282 break; 283 case OPTION_CHROOT: /* NetBSD */ 284 bsdtar->option_chroot = 1; 285 break; 286 case OPTION_DISABLE_COPYFILE: /* Mac OS X */ 287 bsdtar->readdisk_flags &= ~ARCHIVE_READDISK_MAC_COPYFILE; 288 break; 289 case OPTION_EXCLUDE: /* GNU tar */ 290 if (archive_match_exclude_pattern( 291 bsdtar->matching, bsdtar->argument) != ARCHIVE_OK) 292 lafe_errc(1, 0, 293 "Couldn't exclude %s\n", bsdtar->argument); 294 break; 295 case OPTION_FORMAT: /* GNU tar, others */ 296 bsdtar->create_format = bsdtar->argument; 297 break; 298 case 'f': /* SUSv2 */ 299 bsdtar->filename = bsdtar->argument; 300 break; 301 case OPTION_GID: /* cpio */ 302 t = atoi(bsdtar->argument); 303 if (t < 0) 304 lafe_errc(1, 0, 305 "Argument to --gid must be positive"); 306 bsdtar->gid = t; 307 break; 308 case OPTION_GNAME: /* cpio */ 309 bsdtar->gname = bsdtar->argument; 310 break; 311 case 'H': /* BSD convention */ 312 bsdtar->symlink_mode = 'H'; 313 break; 314 case 'h': /* Linux Standards Base, gtar; synonym for -L */ 315 bsdtar->symlink_mode = 'L'; 316 /* Hack: -h by itself is the "help" command. */ 317 possible_help_request = 1; 318 break; 319 case OPTION_HELP: /* GNU tar, others */ 320 long_help(); 321 exit(0); 322 break; 323 case 'I': /* GNU tar */ 324 /* 325 * TODO: Allow 'names' to come from an archive, 326 * not just a text file. Design a good UI for 327 * allowing names and mode/owner to be read 328 * from an archive, with contents coming from 329 * disk. This can be used to "refresh" an 330 * archive or to design archives with special 331 * permissions without having to create those 332 * permissions on disk. 333 */ 334 bsdtar->names_from_file = bsdtar->argument; 335 break; 336 case OPTION_INCLUDE: 337 /* 338 * No one else has the @archive extension, so 339 * no one else needs this to filter entries 340 * when transforming archives. 341 */ 342 if (archive_match_include_pattern(bsdtar->matching, 343 bsdtar->argument) != ARCHIVE_OK) 344 lafe_errc(1, 0, 345 "Failed to add %s to inclusion list", 346 bsdtar->argument); 347 break; 348 case 'j': /* GNU tar */ 349 if (bsdtar->create_compression != '\0') 350 lafe_errc(1, 0, 351 "Can't specify both -%c and -%c", opt, 352 bsdtar->create_compression); 353 bsdtar->create_compression = opt; 354 break; 355 case 'J': /* GNU tar 1.21 and later */ 356 if (bsdtar->create_compression != '\0') 357 lafe_errc(1, 0, 358 "Can't specify both -%c and -%c", opt, 359 bsdtar->create_compression); 360 bsdtar->create_compression = opt; 361 break; 362 case 'k': /* GNU tar */ 363 bsdtar->extract_flags |= ARCHIVE_EXTRACT_NO_OVERWRITE; 364 break; 365 case OPTION_KEEP_NEWER_FILES: /* GNU tar */ 366 bsdtar->extract_flags |= ARCHIVE_EXTRACT_NO_OVERWRITE_NEWER; 367 break; 368 case 'L': /* BSD convention */ 369 bsdtar->symlink_mode = 'L'; 370 break; 371 case 'l': /* SUSv2 and GNU tar beginning with 1.16 */ 372 /* GNU tar 1.13 used -l for --one-file-system */ 373 bsdtar->option_warn_links = 1; 374 break; 375 case OPTION_LZIP: /* GNU tar beginning with 1.23 */ 376 case OPTION_LZMA: /* GNU tar beginning with 1.20 */ 377 if (bsdtar->create_compression != '\0') 378 lafe_errc(1, 0, 379 "Can't specify both -%c and -%c", opt, 380 bsdtar->create_compression); 381 bsdtar->create_compression = opt; 382 break; 383 case 'm': /* SUSv2 */ 384 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_TIME; 385 break; 386 case 'n': /* GNU tar */ 387 bsdtar->option_no_subdirs = 1; 388 break; 389 /* 390 * Selecting files by time: 391 * --newer-?time='date' Only files newer than 'date' 392 * --newer-?time-than='file' Only files newer than time 393 * on specified file (useful for incremental backups) 394 * TODO: Add corresponding "older" options to reverse these. 395 */ 396 case OPTION_NEWER_CTIME: /* GNU tar */ 397 if (archive_match_include_date(bsdtar->matching, 398 ARCHIVE_MATCH_CTIME | ARCHIVE_MATCH_NEWER, 399 bsdtar->argument) != ARCHIVE_OK) 400 lafe_errc(1, 0, "Error : %s", 401 archive_error_string(bsdtar->matching)); 402 break; 403 case OPTION_NEWER_CTIME_THAN: 404 if (archive_match_include_file_time(bsdtar->matching, 405 ARCHIVE_MATCH_CTIME | ARCHIVE_MATCH_NEWER, 406 bsdtar->argument) != ARCHIVE_OK) 407 lafe_errc(1, 0, "Error : %s", 408 archive_error_string(bsdtar->matching)); 409 break; 410 case OPTION_NEWER_MTIME: /* GNU tar */ 411 if (archive_match_include_date(bsdtar->matching, 412 ARCHIVE_MATCH_MTIME | ARCHIVE_MATCH_NEWER, 413 bsdtar->argument) != ARCHIVE_OK) 414 lafe_errc(1, 0, "Error : %s", 415 archive_error_string(bsdtar->matching)); 416 break; 417 case OPTION_NEWER_MTIME_THAN: 418 if (archive_match_include_file_time(bsdtar->matching, 419 ARCHIVE_MATCH_MTIME | ARCHIVE_MATCH_NEWER, 420 bsdtar->argument) != ARCHIVE_OK) 421 lafe_errc(1, 0, "Error : %s", 422 archive_error_string(bsdtar->matching)); 423 break; 424 case OPTION_NODUMP: /* star */ 425 bsdtar->readdisk_flags |= ARCHIVE_READDISK_HONOR_NODUMP; 426 break; 427 case OPTION_NO_SAME_OWNER: /* GNU tar */ 428 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_OWNER; 429 break; 430 case OPTION_NO_SAME_PERMISSIONS: /* GNU tar */ 431 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_PERM; 432 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_ACL; 433 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_XATTR; 434 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_FFLAGS; 435 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_MAC_METADATA; 436 break; 437 case OPTION_NULL: /* GNU tar */ 438 bsdtar->option_null++; 439 break; 440 case OPTION_NUMERIC_OWNER: /* GNU tar */ 441 bsdtar->uname = ""; 442 bsdtar->gname = ""; 443 bsdtar->option_numeric_owner++; 444 break; 445 case 'O': /* GNU tar */ 446 bsdtar->option_stdout = 1; 447 break; 448 case 'o': /* SUSv2 and GNU conflict here, but not fatally */ 449 option_o = 1; /* Record it and resolve it later. */ 450 break; 451 case OPTION_ONE_FILE_SYSTEM: /* GNU tar */ 452 bsdtar->readdisk_flags |= 453 ARCHIVE_READDISK_NO_TRAVERSE_MOUNTS; 454 break; 455 case OPTION_OPTIONS: 456 bsdtar->option_options = bsdtar->argument; 457 break; 458 #if 0 459 /* 460 * The common BSD -P option is not necessary, since 461 * our default is to archive symlinks, not follow 462 * them. This is convenient, as -P conflicts with GNU 463 * tar anyway. 464 */ 465 case 'P': /* BSD convention */ 466 /* Default behavior, no option necessary. */ 467 break; 468 #endif 469 case 'P': /* GNU tar */ 470 bsdtar->extract_flags &= ~SECURITY; 471 bsdtar->option_absolute_paths = 1; 472 break; 473 case 'p': /* GNU tar, star */ 474 bsdtar->extract_flags |= ARCHIVE_EXTRACT_PERM; 475 bsdtar->extract_flags |= ARCHIVE_EXTRACT_ACL; 476 bsdtar->extract_flags |= ARCHIVE_EXTRACT_XATTR; 477 bsdtar->extract_flags |= ARCHIVE_EXTRACT_FFLAGS; 478 bsdtar->extract_flags |= ARCHIVE_EXTRACT_MAC_METADATA; 479 break; 480 case OPTION_POSIX: /* GNU tar */ 481 bsdtar->create_format = "pax"; 482 break; 483 case 'q': /* FreeBSD GNU tar --fast-read, NetBSD -q */ 484 bsdtar->option_fast_read = 1; 485 break; 486 case 'r': /* SUSv2 */ 487 set_mode(bsdtar, opt); 488 break; 489 case 'S': /* NetBSD pax-as-tar */ 490 bsdtar->extract_flags |= ARCHIVE_EXTRACT_SPARSE; 491 break; 492 case 's': /* NetBSD pax-as-tar */ 493 #if HAVE_REGEX_H 494 add_substitution(bsdtar, bsdtar->argument); 495 #else 496 lafe_warnc(0, 497 "-s is not supported by this version of bsdtar"); 498 usage(); 499 #endif 500 break; 501 case OPTION_SAME_OWNER: /* GNU tar */ 502 bsdtar->extract_flags |= ARCHIVE_EXTRACT_OWNER; 503 break; 504 case OPTION_STRIP_COMPONENTS: /* GNU tar 1.15 */ 505 errno = 0; 506 bsdtar->strip_components = strtol(bsdtar->argument, 507 NULL, 0); 508 if (errno) 509 lafe_errc(1, 0, 510 "Invalid --strip-components argument: %s", 511 bsdtar->argument); 512 break; 513 case 'T': /* GNU tar */ 514 bsdtar->names_from_file = bsdtar->argument; 515 break; 516 case 't': /* SUSv2 */ 517 set_mode(bsdtar, opt); 518 bsdtar->verbose++; 519 break; 520 case OPTION_TOTALS: /* GNU tar */ 521 bsdtar->option_totals++; 522 break; 523 case 'U': /* GNU tar */ 524 bsdtar->extract_flags |= ARCHIVE_EXTRACT_UNLINK; 525 bsdtar->option_unlink_first = 1; 526 break; 527 case 'u': /* SUSv2 */ 528 set_mode(bsdtar, opt); 529 break; 530 case OPTION_UID: /* cpio */ 531 t = atoi(bsdtar->argument); 532 if (t < 0) 533 lafe_errc(1, 0, 534 "Argument to --uid must be positive"); 535 bsdtar->uid = t; 536 break; 537 case OPTION_UNAME: /* cpio */ 538 bsdtar->uname = bsdtar->argument; 539 break; 540 case 'v': /* SUSv2 */ 541 bsdtar->verbose++; 542 break; 543 case OPTION_VERSION: /* GNU convention */ 544 version(); 545 break; 546 #if 0 547 /* 548 * The -W longopt feature is handled inside of 549 * bsdtar_getopt(), so -W is not available here. 550 */ 551 case 'W': /* Obscure GNU convention. */ 552 break; 553 #endif 554 case 'w': /* SUSv2 */ 555 bsdtar->option_interactive = 1; 556 break; 557 case 'X': /* GNU tar */ 558 if (archive_match_exclude_pattern_from_file( 559 bsdtar->matching, bsdtar->argument, 0) 560 != ARCHIVE_OK) 561 lafe_errc(1, 0, "Error : %s", 562 archive_error_string(bsdtar->matching)); 563 break; 564 case 'x': /* SUSv2 */ 565 set_mode(bsdtar, opt); 566 break; 567 case 'y': /* FreeBSD version of GNU tar */ 568 if (bsdtar->create_compression != '\0') 569 lafe_errc(1, 0, 570 "Can't specify both -%c and -%c", opt, 571 bsdtar->create_compression); 572 bsdtar->create_compression = opt; 573 break; 574 case 'Z': /* GNU tar */ 575 if (bsdtar->create_compression != '\0') 576 lafe_errc(1, 0, 577 "Can't specify both -%c and -%c", opt, 578 bsdtar->create_compression); 579 bsdtar->create_compression = opt; 580 break; 581 case 'z': /* GNU tar, star, many others */ 582 if (bsdtar->create_compression != '\0') 583 lafe_errc(1, 0, 584 "Can't specify both -%c and -%c", opt, 585 bsdtar->create_compression); 586 bsdtar->create_compression = opt; 587 break; 588 case OPTION_USE_COMPRESS_PROGRAM: 589 bsdtar->compress_program = bsdtar->argument; 590 break; 591 default: 592 usage(); 593 } 594 } 595 596 /* 597 * Sanity-check options. 598 */ 599 600 /* If no "real" mode was specified, treat -h as --help. */ 601 if ((bsdtar->mode == '\0') && possible_help_request) { 602 long_help(); 603 exit(0); 604 } 605 606 /* Otherwise, a mode is required. */ 607 if (bsdtar->mode == '\0') 608 lafe_errc(1, 0, 609 "Must specify one of -c, -r, -t, -u, -x"); 610 611 /* Check boolean options only permitted in certain modes. */ 612 if (bsdtar->readdisk_flags & ARCHIVE_READDISK_NO_TRAVERSE_MOUNTS) 613 only_mode(bsdtar, "--one-file-system", "cru"); 614 if (bsdtar->option_fast_read) 615 only_mode(bsdtar, "--fast-read", "xt"); 616 if (bsdtar->readdisk_flags & ARCHIVE_READDISK_HONOR_NODUMP) 617 only_mode(bsdtar, "--nodump", "cru"); 618 if (option_o > 0) { 619 switch (bsdtar->mode) { 620 case 'c': 621 /* 622 * In GNU tar, -o means "old format." The 623 * "ustar" format is the closest thing 624 * supported by libarchive. 625 */ 626 bsdtar->create_format = "ustar"; 627 /* TODO: bsdtar->create_format = "v7"; */ 628 break; 629 case 'x': 630 /* POSIX-compatible behavior. */ 631 bsdtar->option_no_owner = 1; 632 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_OWNER; 633 break; 634 default: 635 only_mode(bsdtar, "-o", "xc"); 636 break; 637 } 638 } 639 if (bsdtar->option_no_subdirs) 640 only_mode(bsdtar, "-n", "cru"); 641 if (bsdtar->option_stdout) 642 only_mode(bsdtar, "-O", "xt"); 643 if (bsdtar->option_unlink_first) 644 only_mode(bsdtar, "-U", "x"); 645 if (bsdtar->option_warn_links) 646 only_mode(bsdtar, "--check-links", "cr"); 647 648 /* Check other parameters only permitted in certain modes. */ 649 if (bsdtar->create_compression != '\0') { 650 strcpy(buff, "-?"); 651 buff[1] = bsdtar->create_compression; 652 only_mode(bsdtar, buff, "cxt"); 653 } 654 if (bsdtar->create_format != NULL) 655 only_mode(bsdtar, "--format", "cru"); 656 if (bsdtar->symlink_mode != '\0') { 657 strcpy(buff, "-?"); 658 buff[1] = bsdtar->symlink_mode; 659 only_mode(bsdtar, buff, "cru"); 660 } 661 662 /* Filename "-" implies stdio. */ 663 if (strcmp(bsdtar->filename, "-") == 0) 664 bsdtar->filename = NULL; 665 666 switch(bsdtar->mode) { 667 case 'c': 668 tar_mode_c(bsdtar); 669 break; 670 case 'r': 671 tar_mode_r(bsdtar); 672 break; 673 case 't': 674 tar_mode_t(bsdtar); 675 break; 676 case 'u': 677 tar_mode_u(bsdtar); 678 break; 679 case 'x': 680 tar_mode_x(bsdtar); 681 break; 682 } 683 684 archive_match_free(bsdtar->matching); 685 #if HAVE_REGEX_H 686 cleanup_substitution(bsdtar); 687 #endif 688 689 if (bsdtar->return_value != 0) 690 lafe_warnc(0, 691 "Error exit delayed from previous errors."); 692 return (bsdtar->return_value); 693 } 694 695 static void 696 set_mode(struct bsdtar *bsdtar, char opt) 697 { 698 if (bsdtar->mode != '\0' && bsdtar->mode != opt) 699 lafe_errc(1, 0, 700 "Can't specify both -%c and -%c", opt, bsdtar->mode); 701 bsdtar->mode = opt; 702 } 703 704 /* 705 * Verify that the mode is correct. 706 */ 707 static void 708 only_mode(struct bsdtar *bsdtar, const char *opt, const char *valid_modes) 709 { 710 if (strchr(valid_modes, bsdtar->mode) == NULL) 711 lafe_errc(1, 0, 712 "Option %s is not permitted in mode -%c", 713 opt, bsdtar->mode); 714 } 715 716 717 void 718 usage(void) 719 { 720 const char *p; 721 722 p = lafe_progname; 723 724 fprintf(stderr, "Usage:\n"); 725 fprintf(stderr, " List: %s -tf <archive-filename>\n", p); 726 fprintf(stderr, " Extract: %s -xf <archive-filename>\n", p); 727 fprintf(stderr, " Create: %s -cf <archive-filename> [filenames...]\n", p); 728 fprintf(stderr, " Help: %s --help\n", p); 729 exit(1); 730 } 731 732 static void 733 version(void) 734 { 735 printf("bsdtar %s - %s\n", 736 BSDTAR_VERSION_STRING, 737 archive_version_string()); 738 exit(0); 739 } 740 741 static const char *long_help_msg = 742 "First option must be a mode specifier:\n" 743 " -c Create -r Add/Replace -t List -u Update -x Extract\n" 744 "Common Options:\n" 745 " -b # Use # 512-byte records per I/O block\n" 746 " -f <filename> Location of archive (default " _PATH_DEFTAPE ")\n" 747 " -v Verbose\n" 748 " -w Interactive\n" 749 "Create: %p -c [options] [<file> | <dir> | @<archive> | -C <dir> ]\n" 750 " <file>, <dir> add these items to archive\n" 751 " -z, -j, -J, --lzma Compress archive with gzip/bzip2/xz/lzma\n" 752 " --format {ustar|pax|cpio|shar} Select archive format\n" 753 " --exclude <pattern> Skip files that match pattern\n" 754 " -C <dir> Change to <dir> before processing remaining files\n" 755 " @<archive> Add entries from <archive> to output\n" 756 "List: %p -t [options] [<patterns>]\n" 757 " <patterns> If specified, list only entries that match\n" 758 "Extract: %p -x [options] [<patterns>]\n" 759 " <patterns> If specified, extract only entries that match\n" 760 " -k Keep (don't overwrite) existing files\n" 761 " -m Don't restore modification times\n" 762 " -O Write entries to stdout, don't restore to disk\n" 763 " -p Restore permissions (including ACLs, owner, file flags)\n"; 764 765 766 /* 767 * Note that the word 'bsdtar' will always appear in the first line 768 * of output. 769 * 770 * In particular, /bin/sh scripts that need to test for the presence 771 * of bsdtar can use the following template: 772 * 773 * if (tar --help 2>&1 | grep bsdtar >/dev/null 2>&1 ) then \ 774 * echo bsdtar; else echo not bsdtar; fi 775 */ 776 static void 777 long_help(void) 778 { 779 const char *prog; 780 const char *p; 781 782 prog = lafe_progname; 783 784 fflush(stderr); 785 786 p = (strcmp(prog,"bsdtar") != 0) ? "(bsdtar)" : ""; 787 printf("%s%s: manipulate archive files\n", prog, p); 788 789 for (p = long_help_msg; *p != '\0'; p++) { 790 if (*p == '%') { 791 if (p[1] == 'p') { 792 fputs(prog, stdout); 793 p++; 794 } else 795 putchar('%'); 796 } else 797 putchar(*p); 798 } 799 version(); 800 } 801