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) __LA_DEAD; 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) __LA_DEAD; 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 possible_help_request; 141 char buff[16]; 142 143 /* 144 * Use a pointer for consistency, but stack-allocated storage 145 * for ease of cleanup. 146 */ 147 bsdtar = &bsdtar_storage; 148 memset(bsdtar, 0, sizeof(*bsdtar)); 149 bsdtar->fd = -1; /* Mark as "unused" */ 150 bsdtar->gid = -1; 151 bsdtar->uid = -1; 152 bsdtar->flags = 0; 153 compression = compression2 = '\0'; 154 compression_name = compression2_name = NULL; 155 compress_program = NULL; 156 157 #if defined(HAVE_SIGACTION) 158 { /* Set up signal handling. */ 159 struct sigaction sa; 160 sa.sa_handler = siginfo_handler; 161 sigemptyset(&sa.sa_mask); 162 sa.sa_flags = 0; 163 #ifdef SIGINFO 164 if (sigaction(SIGINFO, &sa, NULL)) 165 lafe_errc(1, errno, "sigaction(SIGINFO) failed"); 166 #endif 167 #ifdef SIGUSR1 168 /* ... and treat SIGUSR1 the same way as SIGINFO. */ 169 if (sigaction(SIGUSR1, &sa, NULL)) 170 lafe_errc(1, errno, "sigaction(SIGUSR1) failed"); 171 #endif 172 #ifdef SIGPIPE 173 /* Ignore SIGPIPE signals. */ 174 sa.sa_handler = SIG_IGN; 175 sigaction(SIGPIPE, &sa, NULL); 176 #endif 177 } 178 #endif 179 180 /* Set lafe_progname before calling lafe_warnc. */ 181 lafe_setprogname(*argv, "bsdtar"); 182 183 #if HAVE_SETLOCALE 184 if (setlocale(LC_ALL, "") == NULL) 185 lafe_warnc(0, "Failed to set default locale"); 186 #endif 187 #if defined(HAVE_NL_LANGINFO) && defined(HAVE_D_MD_ORDER) 188 bsdtar->day_first = (*nl_langinfo(D_MD_ORDER) == 'd'); 189 #endif 190 possible_help_request = 0; 191 192 /* Look up uid of current user for future reference */ 193 bsdtar->user_uid = geteuid(); 194 195 /* Default: open tape drive. */ 196 bsdtar->filename = getenv("TAPE"); 197 if (bsdtar->filename == NULL) 198 bsdtar->filename = _PATH_DEFTAPE; 199 200 /* Default block size settings. */ 201 bsdtar->bytes_per_block = DEFAULT_BYTES_PER_BLOCK; 202 /* Allow library to default this unless user specifies -b. */ 203 bsdtar->bytes_in_last_block = -1; 204 205 /* Default: preserve mod time on extract */ 206 bsdtar->extract_flags = ARCHIVE_EXTRACT_TIME; 207 208 /* Default: Perform basic security checks. */ 209 bsdtar->extract_flags |= SECURITY; 210 211 #ifndef _WIN32 212 /* On POSIX systems, assume --same-owner and -p when run by 213 * the root user. This doesn't make any sense on Windows. */ 214 if (bsdtar->user_uid == 0) { 215 /* --same-owner */ 216 bsdtar->extract_flags |= ARCHIVE_EXTRACT_OWNER; 217 /* -p */ 218 bsdtar->extract_flags |= ARCHIVE_EXTRACT_PERM; 219 bsdtar->extract_flags |= ARCHIVE_EXTRACT_ACL; 220 bsdtar->extract_flags |= ARCHIVE_EXTRACT_XATTR; 221 bsdtar->extract_flags |= ARCHIVE_EXTRACT_FFLAGS; 222 bsdtar->extract_flags |= ARCHIVE_EXTRACT_MAC_METADATA; 223 } 224 #endif 225 226 /* 227 * Enable Mac OS "copyfile()" extension by default. 228 * This has no effect on other platforms. 229 */ 230 bsdtar->readdisk_flags |= ARCHIVE_READDISK_MAC_COPYFILE; 231 #ifdef COPYFILE_DISABLE_VAR 232 if (getenv(COPYFILE_DISABLE_VAR)) 233 bsdtar->readdisk_flags &= ~ARCHIVE_READDISK_MAC_COPYFILE; 234 #endif 235 #if defined(__APPLE__) 236 /* 237 * On Mac OS ACLs are archived with copyfile() (--mac-metadata) 238 * Translation to NFSv4 ACLs has to be requested explicitly with --acls 239 */ 240 bsdtar->readdisk_flags |= ARCHIVE_READDISK_NO_ACL; 241 #endif 242 243 bsdtar->matching = archive_match_new(); 244 if (bsdtar->matching == NULL) 245 lafe_errc(1, errno, "Out of memory"); 246 bsdtar->cset = cset_new(); 247 if (bsdtar->cset == NULL) 248 lafe_errc(1, errno, "Out of memory"); 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 'a': /* GNU tar */ 262 bsdtar->flags |= OPTFLAG_AUTO_COMPRESS; 263 break; 264 case OPTION_ACLS: /* GNU tar */ 265 bsdtar->extract_flags |= ARCHIVE_EXTRACT_ACL; 266 bsdtar->readdisk_flags &= ~ARCHIVE_READDISK_NO_ACL; 267 bsdtar->flags |= OPTFLAG_ACLS; 268 break; 269 case 'B': /* GNU tar */ 270 /* libarchive doesn't need this; just ignore it. */ 271 break; 272 case 'b': /* SUSv2 */ 273 t = atoi(bsdtar->argument); 274 if (t <= 0 || t > 8192) 275 lafe_errc(1, 0, 276 "Argument to -b is out of range (1..8192)"); 277 bsdtar->bytes_per_block = 512 * t; 278 /* Explicit -b forces last block size. */ 279 bsdtar->bytes_in_last_block = bsdtar->bytes_per_block; 280 break; 281 case OPTION_B64ENCODE: 282 if (compression2 != '\0') 283 lafe_errc(1, 0, 284 "Can't specify both --uuencode and " 285 "--b64encode"); 286 compression2 = opt; 287 compression2_name = "b64encode"; 288 break; 289 case 'C': /* GNU tar */ 290 if (strlen(bsdtar->argument) == 0) 291 lafe_errc(1, 0, 292 "Meaningless option: -C ''"); 293 294 set_chdir(bsdtar, bsdtar->argument); 295 break; 296 case 'c': /* SUSv2 */ 297 set_mode(bsdtar, opt); 298 break; 299 case OPTION_CHECK_LINKS: /* GNU tar */ 300 bsdtar->flags |= OPTFLAG_WARN_LINKS; 301 break; 302 case OPTION_CHROOT: /* NetBSD */ 303 bsdtar->flags |= OPTFLAG_CHROOT; 304 break; 305 case OPTION_CLEAR_NOCHANGE_FFLAGS: 306 bsdtar->extract_flags |= 307 ARCHIVE_EXTRACT_CLEAR_NOCHANGE_FFLAGS; 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_FFLAGS: 316 bsdtar->extract_flags |= ARCHIVE_EXTRACT_FFLAGS; 317 bsdtar->readdisk_flags &= ~ARCHIVE_READDISK_NO_FFLAGS; 318 bsdtar->flags |= OPTFLAG_FFLAGS; 319 break; 320 case OPTION_FORMAT: /* GNU tar, others */ 321 cset_set_format(bsdtar->cset, bsdtar->argument); 322 break; 323 case 'f': /* SUSv2 */ 324 bsdtar->filename = bsdtar->argument; 325 break; 326 case OPTION_GID: /* cpio */ 327 t = atoi(bsdtar->argument); 328 if (t < 0) 329 lafe_errc(1, 0, 330 "Argument to --gid must be positive"); 331 bsdtar->gid = t; 332 break; 333 case OPTION_GNAME: /* cpio */ 334 bsdtar->gname = bsdtar->argument; 335 break; 336 case OPTION_GRZIP: 337 if (compression != '\0') 338 lafe_errc(1, 0, 339 "Can't specify both -%c and -%c", opt, 340 compression); 341 compression = opt; 342 compression_name = "grzip"; 343 break; 344 case 'H': /* BSD convention */ 345 bsdtar->symlink_mode = 'H'; 346 break; 347 case 'h': /* Linux Standards Base, gtar; synonym for -L */ 348 bsdtar->symlink_mode = 'L'; 349 /* Hack: -h by itself is the "help" command. */ 350 possible_help_request = 1; 351 break; 352 case OPTION_HELP: /* GNU tar, others */ 353 long_help(); 354 exit(0); 355 break; 356 case OPTION_HFS_COMPRESSION: /* Mac OS X v10.6 or later */ 357 bsdtar->extract_flags |= 358 ARCHIVE_EXTRACT_HFS_COMPRESSION_FORCED; 359 break; 360 case OPTION_IGNORE_ZEROS: 361 bsdtar->flags |= OPTFLAG_IGNORE_ZEROS; 362 break; 363 case 'I': /* GNU tar */ 364 /* 365 * TODO: Allow 'names' to come from an archive, 366 * not just a text file. Design a good UI for 367 * allowing names and mode/owner to be read 368 * from an archive, with contents coming from 369 * disk. This can be used to "refresh" an 370 * archive or to design archives with special 371 * permissions without having to create those 372 * permissions on disk. 373 */ 374 bsdtar->names_from_file = bsdtar->argument; 375 break; 376 case OPTION_INCLUDE: 377 /* 378 * No one else has the @archive extension, so 379 * no one else needs this to filter entries 380 * when transforming archives. 381 */ 382 if (archive_match_include_pattern(bsdtar->matching, 383 bsdtar->argument) != ARCHIVE_OK) 384 lafe_errc(1, 0, 385 "Failed to add %s to inclusion list", 386 bsdtar->argument); 387 break; 388 case 'j': /* GNU tar */ 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 = "bzip2"; 395 break; 396 case 'J': /* GNU tar 1.21 and later */ 397 if (compression != '\0') 398 lafe_errc(1, 0, 399 "Can't specify both -%c and -%c", opt, 400 compression); 401 compression = opt; 402 compression_name = "xz"; 403 break; 404 case 'k': /* GNU tar */ 405 bsdtar->extract_flags |= ARCHIVE_EXTRACT_NO_OVERWRITE; 406 break; 407 case OPTION_KEEP_NEWER_FILES: /* GNU tar */ 408 bsdtar->extract_flags |= ARCHIVE_EXTRACT_NO_OVERWRITE_NEWER; 409 break; 410 case 'L': /* BSD convention */ 411 bsdtar->symlink_mode = 'L'; 412 break; 413 case 'l': /* SUSv2 and GNU tar beginning with 1.16 */ 414 /* GNU tar 1.13 used -l for --one-file-system */ 415 bsdtar->flags |= OPTFLAG_WARN_LINKS; 416 break; 417 case OPTION_LRZIP: 418 case OPTION_LZ4: 419 case OPTION_LZIP: /* GNU tar beginning with 1.23 */ 420 case OPTION_LZMA: /* GNU tar beginning with 1.20 */ 421 case OPTION_LZOP: /* GNU tar beginning with 1.21 */ 422 case OPTION_ZSTD: 423 if (compression != '\0') 424 lafe_errc(1, 0, 425 "Can't specify both -%c and -%c", opt, 426 compression); 427 compression = opt; 428 switch (opt) { 429 case OPTION_LRZIP: compression_name = "lrzip"; break; 430 case OPTION_LZ4: compression_name = "lz4"; break; 431 case OPTION_LZIP: compression_name = "lzip"; break; 432 case OPTION_LZMA: compression_name = "lzma"; break; 433 case OPTION_LZOP: compression_name = "lzop"; break; 434 case OPTION_ZSTD: compression_name = "zstd"; break; 435 } 436 break; 437 case 'm': /* SUSv2 */ 438 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_TIME; 439 break; 440 case OPTION_MAC_METADATA: /* Mac OS X */ 441 bsdtar->readdisk_flags |= ARCHIVE_READDISK_MAC_COPYFILE; 442 bsdtar->extract_flags |= ARCHIVE_EXTRACT_MAC_METADATA; 443 bsdtar->flags |= OPTFLAG_MAC_METADATA; 444 break; 445 case 'n': /* GNU tar */ 446 bsdtar->flags |= OPTFLAG_NO_SUBDIRS; 447 break; 448 /* 449 * Selecting files by time: 450 * --newer-?time='date' Only files newer than 'date' 451 * --newer-?time-than='file' Only files newer than time 452 * on specified file (useful for incremental backups) 453 */ 454 case OPTION_NEWER_CTIME: /* GNU tar */ 455 if (archive_match_include_date(bsdtar->matching, 456 ARCHIVE_MATCH_CTIME | 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_NEWER_CTIME_THAN: 462 if (archive_match_include_file_time(bsdtar->matching, 463 ARCHIVE_MATCH_CTIME | ARCHIVE_MATCH_NEWER, 464 bsdtar->argument) != ARCHIVE_OK) 465 lafe_errc(1, 0, "Error : %s", 466 archive_error_string(bsdtar->matching)); 467 break; 468 case OPTION_NEWER_MTIME: /* GNU tar */ 469 if (archive_match_include_date(bsdtar->matching, 470 ARCHIVE_MATCH_MTIME | ARCHIVE_MATCH_NEWER, 471 bsdtar->argument) != ARCHIVE_OK) 472 lafe_errc(1, 0, "Error : %s", 473 archive_error_string(bsdtar->matching)); 474 break; 475 case OPTION_NEWER_MTIME_THAN: 476 if (archive_match_include_file_time(bsdtar->matching, 477 ARCHIVE_MATCH_MTIME | ARCHIVE_MATCH_NEWER, 478 bsdtar->argument) != ARCHIVE_OK) 479 lafe_errc(1, 0, "Error : %s", 480 archive_error_string(bsdtar->matching)); 481 break; 482 case OPTION_NODUMP: /* star */ 483 bsdtar->readdisk_flags |= ARCHIVE_READDISK_HONOR_NODUMP; 484 break; 485 case OPTION_NOPRESERVE_HFS_COMPRESSION: 486 /* Mac OS X v10.6 or later */ 487 bsdtar->extract_flags |= 488 ARCHIVE_EXTRACT_NO_HFS_COMPRESSION; 489 break; 490 case OPTION_NO_ACLS: /* GNU tar */ 491 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_ACL; 492 bsdtar->readdisk_flags |= ARCHIVE_READDISK_NO_ACL; 493 bsdtar->flags |= OPTFLAG_NO_ACLS; 494 break; 495 case OPTION_NO_FFLAGS: 496 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_FFLAGS; 497 bsdtar->readdisk_flags |= ARCHIVE_READDISK_NO_FFLAGS; 498 bsdtar->flags |= OPTFLAG_NO_FFLAGS; 499 break; 500 case OPTION_NO_MAC_METADATA: /* Mac OS X */ 501 bsdtar->readdisk_flags &= ~ARCHIVE_READDISK_MAC_COPYFILE; 502 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_MAC_METADATA; 503 bsdtar->flags |= OPTFLAG_NO_MAC_METADATA; 504 break; 505 case OPTION_NO_SAME_OWNER: /* GNU tar */ 506 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_OWNER; 507 break; 508 case OPTION_NO_SAME_PERMISSIONS: /* GNU tar */ 509 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_PERM; 510 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_ACL; 511 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_XATTR; 512 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_FFLAGS; 513 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_MAC_METADATA; 514 break; 515 case OPTION_NO_XATTRS: /* GNU tar */ 516 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_XATTR; 517 bsdtar->readdisk_flags |= ARCHIVE_READDISK_NO_XATTR; 518 bsdtar->flags |= OPTFLAG_NO_XATTRS; 519 break; 520 case OPTION_NULL: /* GNU tar */ 521 bsdtar->flags |= OPTFLAG_NULL; 522 break; 523 case OPTION_NUMERIC_OWNER: /* GNU tar */ 524 bsdtar->uname = ""; 525 bsdtar->gname = ""; 526 bsdtar->flags |= OPTFLAG_NUMERIC_OWNER; 527 break; 528 case 'O': /* GNU tar */ 529 bsdtar->flags |= OPTFLAG_STDOUT; 530 break; 531 case 'o': /* SUSv2 and GNU conflict here, but not fatally */ 532 bsdtar->flags |= OPTFLAG_O; 533 break; 534 /* 535 * Selecting files by time: 536 * --older-?time='date' Only files older than 'date' 537 * --older-?time-than='file' Only files older than time 538 * on specified file 539 */ 540 case OPTION_OLDER_CTIME: 541 if (archive_match_include_date(bsdtar->matching, 542 ARCHIVE_MATCH_CTIME | ARCHIVE_MATCH_OLDER, 543 bsdtar->argument) != ARCHIVE_OK) 544 lafe_errc(1, 0, "Error : %s", 545 archive_error_string(bsdtar->matching)); 546 break; 547 case OPTION_OLDER_CTIME_THAN: 548 if (archive_match_include_file_time(bsdtar->matching, 549 ARCHIVE_MATCH_CTIME | ARCHIVE_MATCH_OLDER, 550 bsdtar->argument) != ARCHIVE_OK) 551 lafe_errc(1, 0, "Error : %s", 552 archive_error_string(bsdtar->matching)); 553 break; 554 case OPTION_OLDER_MTIME: 555 if (archive_match_include_date(bsdtar->matching, 556 ARCHIVE_MATCH_MTIME | ARCHIVE_MATCH_OLDER, 557 bsdtar->argument) != ARCHIVE_OK) 558 lafe_errc(1, 0, "Error : %s", 559 archive_error_string(bsdtar->matching)); 560 break; 561 case OPTION_OLDER_MTIME_THAN: 562 if (archive_match_include_file_time(bsdtar->matching, 563 ARCHIVE_MATCH_MTIME | ARCHIVE_MATCH_OLDER, 564 bsdtar->argument) != ARCHIVE_OK) 565 lafe_errc(1, 0, "Error : %s", 566 archive_error_string(bsdtar->matching)); 567 break; 568 case OPTION_ONE_FILE_SYSTEM: /* GNU tar */ 569 bsdtar->readdisk_flags |= 570 ARCHIVE_READDISK_NO_TRAVERSE_MOUNTS; 571 break; 572 case OPTION_OPTIONS: 573 bsdtar->option_options = bsdtar->argument; 574 break; 575 #if 0 576 /* 577 * The common BSD -P option is not necessary, since 578 * our default is to archive symlinks, not follow 579 * them. This is convenient, as -P conflicts with GNU 580 * tar anyway. 581 */ 582 case 'P': /* BSD convention */ 583 /* Default behavior, no option necessary. */ 584 break; 585 #endif 586 case 'P': /* GNU tar */ 587 bsdtar->extract_flags &= ~SECURITY; 588 bsdtar->flags |= OPTFLAG_ABSOLUTE_PATHS; 589 break; 590 case 'p': /* GNU tar, star */ 591 bsdtar->extract_flags |= ARCHIVE_EXTRACT_PERM; 592 bsdtar->extract_flags |= ARCHIVE_EXTRACT_ACL; 593 bsdtar->extract_flags |= ARCHIVE_EXTRACT_XATTR; 594 bsdtar->extract_flags |= ARCHIVE_EXTRACT_FFLAGS; 595 bsdtar->extract_flags |= ARCHIVE_EXTRACT_MAC_METADATA; 596 break; 597 case OPTION_PASSPHRASE: 598 bsdtar->passphrase = bsdtar->argument; 599 break; 600 case OPTION_POSIX: /* GNU tar */ 601 cset_set_format(bsdtar->cset, "pax"); 602 break; 603 case 'q': /* FreeBSD GNU tar --fast-read, NetBSD -q */ 604 bsdtar->flags |= OPTFLAG_FAST_READ; 605 break; 606 case 'r': /* SUSv2 */ 607 set_mode(bsdtar, opt); 608 break; 609 case 'S': /* NetBSD pax-as-tar */ 610 bsdtar->extract_flags |= ARCHIVE_EXTRACT_SPARSE; 611 break; 612 case 's': /* NetBSD pax-as-tar */ 613 #if defined(HAVE_REGEX_H) || defined(HAVE_PCREPOSIX_H) 614 add_substitution(bsdtar, bsdtar->argument); 615 #else 616 lafe_warnc(0, 617 "-s is not supported by this version of bsdtar"); 618 usage(); 619 #endif 620 break; 621 case OPTION_SAME_OWNER: /* GNU tar */ 622 bsdtar->extract_flags |= ARCHIVE_EXTRACT_OWNER; 623 break; 624 case OPTION_STRIP_COMPONENTS: /* GNU tar 1.15 */ 625 errno = 0; 626 bsdtar->strip_components = strtol(bsdtar->argument, 627 NULL, 0); 628 if (errno) 629 lafe_errc(1, 0, 630 "Invalid --strip-components argument: %s", 631 bsdtar->argument); 632 break; 633 case 'T': /* GNU tar */ 634 bsdtar->names_from_file = bsdtar->argument; 635 break; 636 case 't': /* SUSv2 */ 637 set_mode(bsdtar, opt); 638 bsdtar->verbose++; 639 break; 640 case OPTION_TOTALS: /* GNU tar */ 641 bsdtar->flags |= OPTFLAG_TOTALS; 642 break; 643 case 'U': /* GNU tar */ 644 bsdtar->extract_flags |= ARCHIVE_EXTRACT_UNLINK; 645 bsdtar->flags |= OPTFLAG_UNLINK_FIRST; 646 break; 647 case 'u': /* SUSv2 */ 648 set_mode(bsdtar, opt); 649 break; 650 case OPTION_UID: /* cpio */ 651 t = atoi(bsdtar->argument); 652 if (t < 0) 653 lafe_errc(1, 0, 654 "Argument to --uid must be positive"); 655 bsdtar->uid = t; 656 break; 657 case OPTION_UNAME: /* cpio */ 658 bsdtar->uname = bsdtar->argument; 659 break; 660 case OPTION_UUENCODE: 661 if (compression2 != '\0') 662 lafe_errc(1, 0, 663 "Can't specify both --uuencode and " 664 "--b64encode"); 665 compression2 = opt; 666 compression2_name = "uuencode"; 667 break; 668 case 'v': /* SUSv2 */ 669 bsdtar->verbose++; 670 break; 671 case OPTION_VERSION: /* GNU convention */ 672 version(); 673 break; 674 #if 0 675 /* 676 * The -W longopt feature is handled inside of 677 * bsdtar_getopt(), so -W is not available here. 678 */ 679 case 'W': /* Obscure GNU convention. */ 680 break; 681 #endif 682 case 'w': /* SUSv2 */ 683 bsdtar->flags |= OPTFLAG_INTERACTIVE; 684 break; 685 case 'X': /* GNU tar */ 686 if (archive_match_exclude_pattern_from_file( 687 bsdtar->matching, bsdtar->argument, 0) 688 != ARCHIVE_OK) 689 lafe_errc(1, 0, "Error : %s", 690 archive_error_string(bsdtar->matching)); 691 break; 692 case 'x': /* SUSv2 */ 693 set_mode(bsdtar, opt); 694 break; 695 case OPTION_XATTRS: /* GNU tar */ 696 bsdtar->extract_flags |= ARCHIVE_EXTRACT_XATTR; 697 bsdtar->readdisk_flags &= ~ARCHIVE_READDISK_NO_XATTR; 698 bsdtar->flags |= OPTFLAG_XATTRS; 699 break; 700 case 'y': /* FreeBSD version of GNU tar */ 701 if (compression != '\0') 702 lafe_errc(1, 0, 703 "Can't specify both -%c and -%c", opt, 704 compression); 705 compression = opt; 706 compression_name = "bzip2"; 707 break; 708 case 'Z': /* GNU tar */ 709 if (compression != '\0') 710 lafe_errc(1, 0, 711 "Can't specify both -%c and -%c", opt, 712 compression); 713 compression = opt; 714 compression_name = "compress"; 715 break; 716 case 'z': /* GNU tar, star, many others */ 717 if (compression != '\0') 718 lafe_errc(1, 0, 719 "Can't specify both -%c and -%c", opt, 720 compression); 721 compression = opt; 722 compression_name = "gzip"; 723 break; 724 case OPTION_USE_COMPRESS_PROGRAM: 725 compress_program = bsdtar->argument; 726 break; 727 default: 728 usage(); 729 } 730 } 731 732 /* 733 * Sanity-check options. 734 */ 735 736 /* If no "real" mode was specified, treat -h as --help. */ 737 if ((bsdtar->mode == '\0') && possible_help_request) { 738 long_help(); 739 exit(0); 740 } 741 742 /* Otherwise, a mode is required. */ 743 if (bsdtar->mode == '\0') 744 lafe_errc(1, 0, 745 "Must specify one of -c, -r, -t, -u, -x"); 746 747 /* Check boolean options only permitted in certain modes. */ 748 if (bsdtar->flags & OPTFLAG_AUTO_COMPRESS) 749 only_mode(bsdtar, "-a", "c"); 750 if (bsdtar->readdisk_flags & ARCHIVE_READDISK_NO_TRAVERSE_MOUNTS) 751 only_mode(bsdtar, "--one-file-system", "cru"); 752 if (bsdtar->flags & OPTFLAG_FAST_READ) 753 only_mode(bsdtar, "--fast-read", "xt"); 754 if (bsdtar->extract_flags & ARCHIVE_EXTRACT_HFS_COMPRESSION_FORCED) 755 only_mode(bsdtar, "--hfsCompression", "x"); 756 if (bsdtar->extract_flags & ARCHIVE_EXTRACT_NO_HFS_COMPRESSION) 757 only_mode(bsdtar, "--nopreserveHFSCompression", "x"); 758 if (bsdtar->readdisk_flags & ARCHIVE_READDISK_HONOR_NODUMP) 759 only_mode(bsdtar, "--nodump", "cru"); 760 if (bsdtar->flags & OPTFLAG_ACLS) 761 only_mode(bsdtar, "--acls", "crux"); 762 if (bsdtar->flags & OPTFLAG_NO_ACLS) 763 only_mode(bsdtar, "--no-acls", "crux"); 764 if (bsdtar->flags & OPTFLAG_XATTRS) 765 only_mode(bsdtar, "--xattrs", "crux"); 766 if (bsdtar->flags & OPTFLAG_NO_XATTRS) 767 only_mode(bsdtar, "--no-xattrs", "crux"); 768 if (bsdtar->flags & OPTFLAG_FFLAGS) 769 only_mode(bsdtar, "--fflags", "crux"); 770 if (bsdtar->flags & OPTFLAG_NO_FFLAGS) 771 only_mode(bsdtar, "--no-fflags", "crux"); 772 if (bsdtar->flags & OPTFLAG_MAC_METADATA) 773 only_mode(bsdtar, "--mac-metadata", "crux"); 774 if (bsdtar->flags & OPTFLAG_NO_MAC_METADATA) 775 only_mode(bsdtar, "--no-mac-metadata", "crux"); 776 if (bsdtar->flags & OPTFLAG_O) { 777 switch (bsdtar->mode) { 778 case 'c': 779 /* 780 * In GNU tar, -o means "old format." The 781 * "ustar" format is the closest thing 782 * supported by libarchive. 783 */ 784 cset_set_format(bsdtar->cset, "ustar"); 785 /* TODO: bsdtar->create_format = "v7"; */ 786 break; 787 case 'x': 788 /* POSIX-compatible behavior. */ 789 bsdtar->flags |= OPTFLAG_NO_OWNER; 790 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_OWNER; 791 break; 792 default: 793 only_mode(bsdtar, "-o", "xc"); 794 break; 795 } 796 } 797 if (bsdtar->flags & OPTFLAG_NO_SUBDIRS) 798 only_mode(bsdtar, "-n", "cru"); 799 if (bsdtar->flags & OPTFLAG_STDOUT) 800 only_mode(bsdtar, "-O", "xt"); 801 if (bsdtar->flags & OPTFLAG_UNLINK_FIRST) 802 only_mode(bsdtar, "-U", "x"); 803 if (bsdtar->flags & OPTFLAG_WARN_LINKS) 804 only_mode(bsdtar, "--check-links", "cr"); 805 806 if ((bsdtar->flags & OPTFLAG_AUTO_COMPRESS) && 807 cset_auto_compress(bsdtar->cset, bsdtar->filename)) { 808 /* Ignore specified compressions if auto-compress works. */ 809 compression = '\0'; 810 compression2 = '\0'; 811 } 812 /* Check other parameters only permitted in certain modes. */ 813 if (compress_program != NULL) { 814 only_mode(bsdtar, "--use-compress-program", "cxt"); 815 cset_add_filter_program(bsdtar->cset, compress_program); 816 /* Ignore specified compressions. */ 817 compression = '\0'; 818 compression2 = '\0'; 819 } 820 if (compression != '\0') { 821 switch (compression) { 822 case 'J': case 'j': case 'y': case 'Z': case 'z': 823 strcpy(buff, "-?"); 824 buff[1] = compression; 825 break; 826 default: 827 strcpy(buff, "--"); 828 strcat(buff, compression_name); 829 break; 830 } 831 only_mode(bsdtar, buff, "cxt"); 832 cset_add_filter(bsdtar->cset, compression_name); 833 } 834 if (compression2 != '\0') { 835 strcpy(buff, "--"); 836 strcat(buff, compression2_name); 837 only_mode(bsdtar, buff, "cxt"); 838 cset_add_filter(bsdtar->cset, compression2_name); 839 } 840 if (cset_get_format(bsdtar->cset) != NULL) 841 only_mode(bsdtar, "--format", "cru"); 842 if (bsdtar->symlink_mode != '\0') { 843 strcpy(buff, "-?"); 844 buff[1] = bsdtar->symlink_mode; 845 only_mode(bsdtar, buff, "cru"); 846 } 847 848 /* Filename "-" implies stdio. */ 849 if (strcmp(bsdtar->filename, "-") == 0) 850 bsdtar->filename = NULL; 851 852 switch(bsdtar->mode) { 853 case 'c': 854 tar_mode_c(bsdtar); 855 break; 856 case 'r': 857 tar_mode_r(bsdtar); 858 break; 859 case 't': 860 tar_mode_t(bsdtar); 861 break; 862 case 'u': 863 tar_mode_u(bsdtar); 864 break; 865 case 'x': 866 tar_mode_x(bsdtar); 867 break; 868 } 869 870 archive_match_free(bsdtar->matching); 871 #if defined(HAVE_REGEX_H) || defined(HAVE_PCREPOSIX_H) 872 cleanup_substitution(bsdtar); 873 #endif 874 cset_free(bsdtar->cset); 875 passphrase_free(bsdtar->ppbuff); 876 877 if (bsdtar->return_value != 0) 878 lafe_warnc(0, 879 "Error exit delayed from previous errors."); 880 return (bsdtar->return_value); 881 } 882 883 static void 884 set_mode(struct bsdtar *bsdtar, char opt) 885 { 886 if (bsdtar->mode != '\0' && bsdtar->mode != opt) 887 lafe_errc(1, 0, 888 "Can't specify both -%c and -%c", opt, bsdtar->mode); 889 bsdtar->mode = opt; 890 } 891 892 /* 893 * Verify that the mode is correct. 894 */ 895 static void 896 only_mode(struct bsdtar *bsdtar, const char *opt, const char *valid_modes) 897 { 898 if (strchr(valid_modes, bsdtar->mode) == NULL) 899 lafe_errc(1, 0, 900 "Option %s is not permitted in mode -%c", 901 opt, bsdtar->mode); 902 } 903 904 905 void 906 usage(void) 907 { 908 const char *p; 909 910 p = lafe_getprogname(); 911 912 fprintf(stderr, "Usage:\n"); 913 fprintf(stderr, " List: %s -tf <archive-filename>\n", p); 914 fprintf(stderr, " Extract: %s -xf <archive-filename>\n", p); 915 fprintf(stderr, " Create: %s -cf <archive-filename> [filenames...]\n", p); 916 fprintf(stderr, " Help: %s --help\n", p); 917 exit(1); 918 } 919 920 static void 921 version(void) 922 { 923 printf("bsdtar %s - %s \n", 924 BSDTAR_VERSION_STRING, 925 archive_version_details()); 926 exit(0); 927 } 928 929 static const char *long_help_msg = 930 "First option must be a mode specifier:\n" 931 " -c Create -r Add/Replace -t List -u Update -x Extract\n" 932 "Common Options:\n" 933 " -b # Use # 512-byte records per I/O block\n" 934 " -f <filename> Location of archive (default " _PATH_DEFTAPE ")\n" 935 " -v Verbose\n" 936 " -w Interactive\n" 937 "Create: %p -c [options] [<file> | <dir> | @<archive> | -C <dir> ]\n" 938 " <file>, <dir> add these items to archive\n" 939 " -z, -j, -J, --lzma Compress archive with gzip/bzip2/xz/lzma\n" 940 " --format {ustar|pax|cpio|shar} Select archive format\n" 941 " --exclude <pattern> Skip files that match pattern\n" 942 " -C <dir> Change to <dir> before processing remaining files\n" 943 " @<archive> Add entries from <archive> to output\n" 944 "List: %p -t [options] [<patterns>]\n" 945 " <patterns> If specified, list only entries that match\n" 946 "Extract: %p -x [options] [<patterns>]\n" 947 " <patterns> If specified, extract only entries that match\n" 948 " -k Keep (don't overwrite) existing files\n" 949 " -m Don't restore modification times\n" 950 " -O Write entries to stdout, don't restore to disk\n" 951 " -p Restore permissions (including ACLs, owner, file flags)\n"; 952 953 954 /* 955 * Note that the word 'bsdtar' will always appear in the first line 956 * of output. 957 * 958 * In particular, /bin/sh scripts that need to test for the presence 959 * of bsdtar can use the following template: 960 * 961 * if (tar --help 2>&1 | grep bsdtar >/dev/null 2>&1 ) then \ 962 * echo bsdtar; else echo not bsdtar; fi 963 */ 964 static void 965 long_help(void) 966 { 967 const char *prog; 968 const char *p; 969 970 prog = lafe_getprogname(); 971 972 fflush(stderr); 973 974 p = (strcmp(prog,"bsdtar") != 0) ? "(bsdtar)" : ""; 975 printf("%s%s: manipulate archive files\n", prog, p); 976 977 for (p = long_help_msg; *p != '\0'; p++) { 978 if (*p == '%') { 979 if (p[1] == 'p') { 980 fputs(prog, stdout); 981 p++; 982 } else 983 putchar('%'); 984 } else 985 putchar(*p); 986 } 987 version(); 988 } 989