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 /* External function to parse a date/time string */ 122 time_t get_date(time_t, const char *); 123 124 static void long_help(void); 125 static void only_mode(struct bsdtar *, const char *opt, 126 const char *valid); 127 static void set_mode(struct bsdtar *, char opt); 128 static void version(void); 129 130 /* A basic set of security flags to request from libarchive. */ 131 #define SECURITY \ 132 (ARCHIVE_EXTRACT_SECURE_SYMLINKS \ 133 | ARCHIVE_EXTRACT_SECURE_NODOTDOT) 134 135 int 136 main(int argc, char **argv) 137 { 138 struct bsdtar *bsdtar, bsdtar_storage; 139 int opt, t; 140 char option_o; 141 char possible_help_request; 142 char buff[16]; 143 time_t now; 144 145 /* 146 * Use a pointer for consistency, but stack-allocated storage 147 * for ease of cleanup. 148 */ 149 bsdtar = &bsdtar_storage; 150 memset(bsdtar, 0, sizeof(*bsdtar)); 151 bsdtar->fd = -1; /* Mark as "unused" */ 152 bsdtar->gid = -1; 153 bsdtar->uid = -1; 154 option_o = 0; 155 156 #if defined(HAVE_SIGACTION) 157 { /* Set up signal handling. */ 158 struct sigaction sa; 159 sa.sa_handler = siginfo_handler; 160 sigemptyset(&sa.sa_mask); 161 sa.sa_flags = 0; 162 #ifdef SIGINFO 163 if (sigaction(SIGINFO, &sa, NULL)) 164 lafe_errc(1, errno, "sigaction(SIGINFO) failed"); 165 #endif 166 #ifdef SIGUSR1 167 /* ... and treat SIGUSR1 the same way as SIGINFO. */ 168 if (sigaction(SIGUSR1, &sa, NULL)) 169 lafe_errc(1, errno, "sigaction(SIGUSR1) failed"); 170 #endif 171 #ifdef SIGPIPE 172 /* Ignore SIGPIPE signals. */ 173 sa.sa_handler = SIG_IGN; 174 sigaction(SIGPIPE, &sa, NULL); 175 #endif 176 } 177 #endif 178 179 180 /* Need lafe_progname before calling lafe_warnc. */ 181 if (*argv == NULL) 182 lafe_progname = "bsdtar"; 183 else { 184 #if defined(_WIN32) && !defined(__CYGWIN__) 185 lafe_progname = strrchr(*argv, '\\'); 186 #else 187 lafe_progname = strrchr(*argv, '/'); 188 #endif 189 if (lafe_progname != NULL) 190 lafe_progname++; 191 else 192 lafe_progname = *argv; 193 } 194 195 time(&now); 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->enable_copyfile = 1; 245 #ifdef COPYFILE_DISABLE_VAR 246 if (getenv(COPYFILE_DISABLE_VAR)) 247 bsdtar->enable_copyfile = 0; 248 #endif 249 250 bsdtar->argv = argv; 251 bsdtar->argc = argc; 252 253 /* 254 * Comments following each option indicate where that option 255 * originated: SUSv2, POSIX, GNU tar, star, etc. If there's 256 * no such comment, then I don't know of anyone else who 257 * implements that option. 258 */ 259 while ((opt = bsdtar_getopt(bsdtar)) != -1) { 260 switch (opt) { 261 case 'B': /* GNU tar */ 262 /* libarchive doesn't need this; just ignore it. */ 263 break; 264 case 'b': /* SUSv2 */ 265 t = atoi(bsdtar->argument); 266 if (t <= 0 || t > 8192) 267 lafe_errc(1, 0, 268 "Argument to -b is out of range (1..8192)"); 269 bsdtar->bytes_per_block = 512 * t; 270 /* Explicit -b forces last block size. */ 271 bsdtar->bytes_in_last_block = bsdtar->bytes_per_block; 272 break; 273 case 'C': /* GNU tar */ 274 if (strlen(bsdtar->argument) == 0) 275 lafe_errc(1, 0, 276 "Meaningless option: -C ''"); 277 278 set_chdir(bsdtar, bsdtar->argument); 279 break; 280 case 'c': /* SUSv2 */ 281 set_mode(bsdtar, opt); 282 break; 283 case OPTION_CHECK_LINKS: /* GNU tar */ 284 bsdtar->option_warn_links = 1; 285 break; 286 case OPTION_CHROOT: /* NetBSD */ 287 bsdtar->option_chroot = 1; 288 break; 289 case OPTION_DISABLE_COPYFILE: /* Mac OS X */ 290 bsdtar->enable_copyfile = 0; 291 break; 292 case OPTION_EXCLUDE: /* GNU tar */ 293 if (lafe_exclude(&bsdtar->matching, bsdtar->argument)) 294 lafe_errc(1, 0, 295 "Couldn't exclude %s\n", bsdtar->argument); 296 break; 297 case OPTION_FORMAT: /* GNU tar, others */ 298 bsdtar->create_format = bsdtar->argument; 299 break; 300 case 'f': /* SUSv2 */ 301 bsdtar->filename = bsdtar->argument; 302 break; 303 case OPTION_GID: /* cpio */ 304 t = atoi(bsdtar->argument); 305 if (t < 0) 306 lafe_errc(1, 0, 307 "Argument to --gid must be positive"); 308 bsdtar->gid = t; 309 break; 310 case OPTION_GNAME: /* cpio */ 311 bsdtar->gname = bsdtar->argument; 312 break; 313 case 'H': /* BSD convention */ 314 bsdtar->symlink_mode = 'H'; 315 break; 316 case 'h': /* Linux Standards Base, gtar; synonym for -L */ 317 bsdtar->symlink_mode = 'L'; 318 /* Hack: -h by itself is the "help" command. */ 319 possible_help_request = 1; 320 break; 321 case OPTION_HELP: /* GNU tar, others */ 322 long_help(); 323 exit(0); 324 break; 325 case 'I': /* GNU tar */ 326 /* 327 * TODO: Allow 'names' to come from an archive, 328 * not just a text file. Design a good UI for 329 * allowing names and mode/owner to be read 330 * from an archive, with contents coming from 331 * disk. This can be used to "refresh" an 332 * archive or to design archives with special 333 * permissions without having to create those 334 * permissions on disk. 335 */ 336 bsdtar->names_from_file = bsdtar->argument; 337 break; 338 case OPTION_INCLUDE: 339 /* 340 * No one else has the @archive extension, so 341 * no one else needs this to filter entries 342 * when transforming archives. 343 */ 344 if (lafe_include(&bsdtar->matching, bsdtar->argument)) 345 lafe_errc(1, 0, 346 "Failed to add %s to inclusion list", 347 bsdtar->argument); 348 break; 349 case 'j': /* GNU tar */ 350 if (bsdtar->create_compression != '\0') 351 lafe_errc(1, 0, 352 "Can't specify both -%c and -%c", opt, 353 bsdtar->create_compression); 354 bsdtar->create_compression = opt; 355 break; 356 case 'J': /* GNU tar 1.21 and later */ 357 if (bsdtar->create_compression != '\0') 358 lafe_errc(1, 0, 359 "Can't specify both -%c and -%c", opt, 360 bsdtar->create_compression); 361 bsdtar->create_compression = opt; 362 break; 363 case 'k': /* GNU tar */ 364 bsdtar->extract_flags |= ARCHIVE_EXTRACT_NO_OVERWRITE; 365 break; 366 case OPTION_KEEP_NEWER_FILES: /* GNU tar */ 367 bsdtar->extract_flags |= ARCHIVE_EXTRACT_NO_OVERWRITE_NEWER; 368 break; 369 case 'L': /* BSD convention */ 370 bsdtar->symlink_mode = 'L'; 371 break; 372 case 'l': /* SUSv2 and GNU tar beginning with 1.16 */ 373 /* GNU tar 1.13 used -l for --one-file-system */ 374 bsdtar->option_warn_links = 1; 375 break; 376 case OPTION_LZIP: /* GNU tar beginning with 1.23 */ 377 case OPTION_LZMA: /* GNU tar beginning with 1.20 */ 378 if (bsdtar->create_compression != '\0') 379 lafe_errc(1, 0, 380 "Can't specify both -%c and -%c", opt, 381 bsdtar->create_compression); 382 bsdtar->create_compression = opt; 383 break; 384 case 'm': /* SUSv2 */ 385 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_TIME; 386 break; 387 case 'n': /* GNU tar */ 388 bsdtar->option_no_subdirs = 1; 389 break; 390 /* 391 * Selecting files by time: 392 * --newer-?time='date' Only files newer than 'date' 393 * --newer-?time-than='file' Only files newer than time 394 * on specified file (useful for incremental backups) 395 * TODO: Add corresponding "older" options to reverse these. 396 */ 397 case OPTION_NEWER_CTIME: /* GNU tar */ 398 bsdtar->newer_ctime_filter = 1; 399 bsdtar->newer_ctime_sec = get_date(now, bsdtar->argument); 400 break; 401 case OPTION_NEWER_CTIME_THAN: 402 { 403 struct stat st; 404 if (stat(bsdtar->argument, &st) != 0) 405 lafe_errc(1, 0, 406 "Can't open file %s", bsdtar->argument); 407 bsdtar->newer_ctime_filter = 1; 408 bsdtar->newer_ctime_sec = st.st_ctime; 409 bsdtar->newer_ctime_nsec = 410 ARCHIVE_STAT_CTIME_NANOS(&st); 411 } 412 break; 413 case OPTION_NEWER_MTIME: /* GNU tar */ 414 bsdtar->newer_mtime_filter = 1; 415 bsdtar->newer_mtime_sec = get_date(now, bsdtar->argument); 416 break; 417 case OPTION_NEWER_MTIME_THAN: 418 { 419 struct stat st; 420 if (stat(bsdtar->argument, &st) != 0) 421 lafe_errc(1, 0, 422 "Can't open file %s", bsdtar->argument); 423 bsdtar->newer_mtime_filter = 1; 424 bsdtar->newer_mtime_sec = st.st_mtime; 425 bsdtar->newer_mtime_nsec = 426 ARCHIVE_STAT_MTIME_NANOS(&st); 427 } 428 break; 429 case OPTION_NODUMP: /* star */ 430 bsdtar->option_honor_nodump = 1; 431 break; 432 case OPTION_NO_SAME_OWNER: /* GNU tar */ 433 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_OWNER; 434 break; 435 case OPTION_NO_SAME_PERMISSIONS: /* GNU tar */ 436 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_PERM; 437 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_ACL; 438 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_XATTR; 439 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_FFLAGS; 440 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_MAC_METADATA; 441 break; 442 case OPTION_NULL: /* GNU tar */ 443 bsdtar->option_null++; 444 break; 445 case OPTION_NUMERIC_OWNER: /* GNU tar */ 446 bsdtar->uname = ""; 447 bsdtar->gname = ""; 448 bsdtar->option_numeric_owner++; 449 break; 450 case 'O': /* GNU tar */ 451 bsdtar->option_stdout = 1; 452 break; 453 case 'o': /* SUSv2 and GNU conflict here, but not fatally */ 454 option_o = 1; /* Record it and resolve it later. */ 455 break; 456 case OPTION_ONE_FILE_SYSTEM: /* GNU tar */ 457 bsdtar->option_dont_traverse_mounts = 1; 458 break; 459 case OPTION_OPTIONS: 460 bsdtar->option_options = bsdtar->argument; 461 break; 462 #if 0 463 /* 464 * The common BSD -P option is not necessary, since 465 * our default is to archive symlinks, not follow 466 * them. This is convenient, as -P conflicts with GNU 467 * tar anyway. 468 */ 469 case 'P': /* BSD convention */ 470 /* Default behavior, no option necessary. */ 471 break; 472 #endif 473 case 'P': /* GNU tar */ 474 bsdtar->extract_flags &= ~SECURITY; 475 bsdtar->option_absolute_paths = 1; 476 break; 477 case 'p': /* GNU tar, star */ 478 bsdtar->extract_flags |= ARCHIVE_EXTRACT_PERM; 479 bsdtar->extract_flags |= ARCHIVE_EXTRACT_ACL; 480 bsdtar->extract_flags |= ARCHIVE_EXTRACT_XATTR; 481 bsdtar->extract_flags |= ARCHIVE_EXTRACT_FFLAGS; 482 bsdtar->extract_flags |= ARCHIVE_EXTRACT_MAC_METADATA; 483 break; 484 case OPTION_POSIX: /* GNU tar */ 485 bsdtar->create_format = "pax"; 486 break; 487 case 'q': /* FreeBSD GNU tar --fast-read, NetBSD -q */ 488 bsdtar->option_fast_read = 1; 489 break; 490 case 'r': /* SUSv2 */ 491 set_mode(bsdtar, opt); 492 break; 493 case 'S': /* NetBSD pax-as-tar */ 494 bsdtar->extract_flags |= ARCHIVE_EXTRACT_SPARSE; 495 break; 496 case 's': /* NetBSD pax-as-tar */ 497 #if HAVE_REGEX_H 498 add_substitution(bsdtar, bsdtar->argument); 499 #else 500 lafe_warnc(0, 501 "-s is not supported by this version of bsdtar"); 502 usage(); 503 #endif 504 break; 505 case OPTION_SAME_OWNER: /* GNU tar */ 506 bsdtar->extract_flags |= ARCHIVE_EXTRACT_OWNER; 507 break; 508 case OPTION_STRIP_COMPONENTS: /* GNU tar 1.15 */ 509 errno = 0; 510 bsdtar->strip_components = strtol(bsdtar->argument, 511 NULL, 0); 512 if (errno) 513 lafe_errc(1, 0, 514 "Invalid --strip-components argument: %s", 515 bsdtar->argument); 516 break; 517 case 'T': /* GNU tar */ 518 bsdtar->names_from_file = bsdtar->argument; 519 break; 520 case 't': /* SUSv2 */ 521 set_mode(bsdtar, opt); 522 bsdtar->verbose++; 523 break; 524 case OPTION_TOTALS: /* GNU tar */ 525 bsdtar->option_totals++; 526 break; 527 case 'U': /* GNU tar */ 528 bsdtar->extract_flags |= ARCHIVE_EXTRACT_UNLINK; 529 bsdtar->option_unlink_first = 1; 530 break; 531 case 'u': /* SUSv2 */ 532 set_mode(bsdtar, opt); 533 break; 534 case OPTION_UID: /* cpio */ 535 t = atoi(bsdtar->argument); 536 if (t < 0) 537 lafe_errc(1, 0, 538 "Argument to --uid must be positive"); 539 bsdtar->uid = t; 540 break; 541 case OPTION_UNAME: /* cpio */ 542 bsdtar->uname = bsdtar->argument; 543 break; 544 case 'v': /* SUSv2 */ 545 bsdtar->verbose++; 546 break; 547 case OPTION_VERSION: /* GNU convention */ 548 version(); 549 break; 550 #if 0 551 /* 552 * The -W longopt feature is handled inside of 553 * bsdtar_getopt(), so -W is not available here. 554 */ 555 case 'W': /* Obscure GNU convention. */ 556 break; 557 #endif 558 case 'w': /* SUSv2 */ 559 bsdtar->option_interactive = 1; 560 break; 561 case 'X': /* GNU tar */ 562 if (lafe_exclude_from_file(&bsdtar->matching, bsdtar->argument)) 563 lafe_errc(1, 0, 564 "failed to process exclusions from file %s", 565 bsdtar->argument); 566 break; 567 case 'x': /* SUSv2 */ 568 set_mode(bsdtar, opt); 569 break; 570 case 'y': /* FreeBSD version of GNU tar */ 571 if (bsdtar->create_compression != '\0') 572 lafe_errc(1, 0, 573 "Can't specify both -%c and -%c", opt, 574 bsdtar->create_compression); 575 bsdtar->create_compression = opt; 576 break; 577 case 'Z': /* GNU tar */ 578 if (bsdtar->create_compression != '\0') 579 lafe_errc(1, 0, 580 "Can't specify both -%c and -%c", opt, 581 bsdtar->create_compression); 582 bsdtar->create_compression = opt; 583 break; 584 case 'z': /* GNU tar, star, many others */ 585 if (bsdtar->create_compression != '\0') 586 lafe_errc(1, 0, 587 "Can't specify both -%c and -%c", opt, 588 bsdtar->create_compression); 589 bsdtar->create_compression = opt; 590 break; 591 case OPTION_USE_COMPRESS_PROGRAM: 592 bsdtar->compress_program = bsdtar->argument; 593 break; 594 default: 595 usage(); 596 } 597 } 598 599 /* 600 * Sanity-check options. 601 */ 602 603 /* If no "real" mode was specified, treat -h as --help. */ 604 if ((bsdtar->mode == '\0') && possible_help_request) { 605 long_help(); 606 exit(0); 607 } 608 609 /* Otherwise, a mode is required. */ 610 if (bsdtar->mode == '\0') 611 lafe_errc(1, 0, 612 "Must specify one of -c, -r, -t, -u, -x"); 613 614 /* Check boolean options only permitted in certain modes. */ 615 if (bsdtar->option_dont_traverse_mounts) 616 only_mode(bsdtar, "--one-file-system", "cru"); 617 if (bsdtar->option_fast_read) 618 only_mode(bsdtar, "--fast-read", "xt"); 619 if (bsdtar->option_honor_nodump) 620 only_mode(bsdtar, "--nodump", "cru"); 621 if (option_o > 0) { 622 switch (bsdtar->mode) { 623 case 'c': 624 /* 625 * In GNU tar, -o means "old format." The 626 * "ustar" format is the closest thing 627 * supported by libarchive. 628 */ 629 bsdtar->create_format = "ustar"; 630 /* TODO: bsdtar->create_format = "v7"; */ 631 break; 632 case 'x': 633 /* POSIX-compatible behavior. */ 634 bsdtar->option_no_owner = 1; 635 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_OWNER; 636 break; 637 default: 638 only_mode(bsdtar, "-o", "xc"); 639 break; 640 } 641 } 642 if (bsdtar->option_no_subdirs) 643 only_mode(bsdtar, "-n", "cru"); 644 if (bsdtar->option_stdout) 645 only_mode(bsdtar, "-O", "xt"); 646 if (bsdtar->option_unlink_first) 647 only_mode(bsdtar, "-U", "x"); 648 if (bsdtar->option_warn_links) 649 only_mode(bsdtar, "--check-links", "cr"); 650 651 /* Check other parameters only permitted in certain modes. */ 652 if (bsdtar->create_compression != '\0') { 653 strcpy(buff, "-?"); 654 buff[1] = bsdtar->create_compression; 655 only_mode(bsdtar, buff, "cxt"); 656 } 657 if (bsdtar->create_format != NULL) 658 only_mode(bsdtar, "--format", "cru"); 659 if (bsdtar->symlink_mode != '\0') { 660 strcpy(buff, "-?"); 661 buff[1] = bsdtar->symlink_mode; 662 only_mode(bsdtar, buff, "cru"); 663 } 664 665 /* Filename "-" implies stdio. */ 666 if (strcmp(bsdtar->filename, "-") == 0) 667 bsdtar->filename = NULL; 668 669 switch(bsdtar->mode) { 670 case 'c': 671 tar_mode_c(bsdtar); 672 break; 673 case 'r': 674 tar_mode_r(bsdtar); 675 break; 676 case 't': 677 tar_mode_t(bsdtar); 678 break; 679 case 'u': 680 tar_mode_u(bsdtar); 681 break; 682 case 'x': 683 tar_mode_x(bsdtar); 684 break; 685 } 686 687 lafe_cleanup_exclusions(&bsdtar->matching); 688 #if HAVE_REGEX_H 689 cleanup_substitution(bsdtar); 690 #endif 691 692 if (bsdtar->return_value != 0) 693 lafe_warnc(0, 694 "Error exit delayed from previous errors."); 695 return (bsdtar->return_value); 696 } 697 698 static void 699 set_mode(struct bsdtar *bsdtar, char opt) 700 { 701 if (bsdtar->mode != '\0' && bsdtar->mode != opt) 702 lafe_errc(1, 0, 703 "Can't specify both -%c and -%c", opt, bsdtar->mode); 704 bsdtar->mode = opt; 705 } 706 707 /* 708 * Verify that the mode is correct. 709 */ 710 static void 711 only_mode(struct bsdtar *bsdtar, const char *opt, const char *valid_modes) 712 { 713 if (strchr(valid_modes, bsdtar->mode) == NULL) 714 lafe_errc(1, 0, 715 "Option %s is not permitted in mode -%c", 716 opt, bsdtar->mode); 717 } 718 719 720 void 721 usage(void) 722 { 723 const char *p; 724 725 p = lafe_progname; 726 727 fprintf(stderr, "Usage:\n"); 728 fprintf(stderr, " List: %s -tf <archive-filename>\n", p); 729 fprintf(stderr, " Extract: %s -xf <archive-filename>\n", p); 730 fprintf(stderr, " Create: %s -cf <archive-filename> [filenames...]\n", p); 731 fprintf(stderr, " Help: %s --help\n", p); 732 exit(1); 733 } 734 735 static void 736 version(void) 737 { 738 printf("bsdtar %s - %s\n", 739 BSDTAR_VERSION_STRING, 740 archive_version_string()); 741 exit(0); 742 } 743 744 static const char *long_help_msg = 745 "First option must be a mode specifier:\n" 746 " -c Create -r Add/Replace -t List -u Update -x Extract\n" 747 "Common Options:\n" 748 " -b # Use # 512-byte records per I/O block\n" 749 " -f <filename> Location of archive (default " _PATH_DEFTAPE ")\n" 750 " -v Verbose\n" 751 " -w Interactive\n" 752 "Create: %p -c [options] [<file> | <dir> | @<archive> | -C <dir> ]\n" 753 " <file>, <dir> add these items to archive\n" 754 " -z, -j, -J, --lzma Compress archive with gzip/bzip2/xz/lzma\n" 755 " --format {ustar|pax|cpio|shar} Select archive format\n" 756 " --exclude <pattern> Skip files that match pattern\n" 757 " -C <dir> Change to <dir> before processing remaining files\n" 758 " @<archive> Add entries from <archive> to output\n" 759 "List: %p -t [options] [<patterns>]\n" 760 " <patterns> If specified, list only entries that match\n" 761 "Extract: %p -x [options] [<patterns>]\n" 762 " <patterns> If specified, extract only entries that match\n" 763 " -k Keep (don't overwrite) existing files\n" 764 " -m Don't restore modification times\n" 765 " -O Write entries to stdout, don't restore to disk\n" 766 " -p Restore permissions (including ACLs, owner, file flags)\n"; 767 768 769 /* 770 * Note that the word 'bsdtar' will always appear in the first line 771 * of output. 772 * 773 * In particular, /bin/sh scripts that need to test for the presence 774 * of bsdtar can use the following template: 775 * 776 * if (tar --help 2>&1 | grep bsdtar >/dev/null 2>&1 ) then \ 777 * echo bsdtar; else echo not bsdtar; fi 778 */ 779 static void 780 long_help(void) 781 { 782 const char *prog; 783 const char *p; 784 785 prog = lafe_progname; 786 787 fflush(stderr); 788 789 p = (strcmp(prog,"bsdtar") != 0) ? "(bsdtar)" : ""; 790 printf("%s%s: manipulate archive files\n", prog, p); 791 792 for (p = long_help_msg; *p != '\0'; p++) { 793 if (*p == '%') { 794 if (p[1] == 'p') { 795 fputs(prog, stdout); 796 p++; 797 } else 798 putchar('%'); 799 } else 800 putchar(*p); 801 } 802 version(); 803 } 804