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 static char const * const vcs_files[] = { 133 /* CVS */ 134 "CVS", ".cvsignore", 135 /* RCS */ 136 "RCS", 137 /* SCCS */ 138 "SCCS", 139 /* SVN */ 140 ".svn", 141 /* git */ 142 ".git", ".gitignore", ".gitattributes", ".gitmodules", 143 /* Arch */ 144 ".arch-ids", "{arch}", "=RELEASE-ID", "=meta-update", "=update", 145 /* Bazaar */ 146 ".bzr", ".bzrignore", ".bzrtags", 147 /* Mercurial */ 148 ".hg", ".hgignore", ".hgtags", 149 /* darcs */ 150 "_darcs", 151 NULL 152 }; 153 154 int 155 main(int argc, char **argv) 156 { 157 struct bsdtar *bsdtar, bsdtar_storage; 158 int opt, t; 159 char compression, compression2; 160 const char *compression_name, *compression2_name; 161 const char *compress_program; 162 char *tptr; 163 char possible_help_request; 164 char buff[16]; 165 166 /* 167 * Use a pointer for consistency, but stack-allocated storage 168 * for ease of cleanup. 169 */ 170 bsdtar = &bsdtar_storage; 171 memset(bsdtar, 0, sizeof(*bsdtar)); 172 bsdtar->fd = -1; /* Mark as "unused" */ 173 bsdtar->gid = -1; 174 bsdtar->uid = -1; 175 bsdtar->flags = 0; 176 compression = compression2 = '\0'; 177 compression_name = compression2_name = NULL; 178 compress_program = NULL; 179 180 #if defined(HAVE_SIGACTION) 181 { /* Set up signal handling. */ 182 struct sigaction sa; 183 sa.sa_handler = siginfo_handler; 184 sigemptyset(&sa.sa_mask); 185 sa.sa_flags = 0; 186 #ifdef SIGINFO 187 if (sigaction(SIGINFO, &sa, NULL)) 188 lafe_errc(1, errno, "sigaction(SIGINFO) failed"); 189 #endif 190 #ifdef SIGUSR1 191 /* ... and treat SIGUSR1 the same way as SIGINFO. */ 192 if (sigaction(SIGUSR1, &sa, NULL)) 193 lafe_errc(1, errno, "sigaction(SIGUSR1) failed"); 194 #endif 195 #ifdef SIGPIPE 196 /* Ignore SIGPIPE signals. */ 197 sa.sa_handler = SIG_IGN; 198 sigaction(SIGPIPE, &sa, NULL); 199 #endif 200 } 201 #endif 202 203 /* Set lafe_progname before calling lafe_warnc. */ 204 lafe_setprogname(*argv, "bsdtar"); 205 206 #if HAVE_SETLOCALE 207 if (setlocale(LC_ALL, "") == NULL) 208 lafe_warnc(0, "Failed to set default locale"); 209 #endif 210 #if defined(HAVE_NL_LANGINFO) && defined(HAVE_D_MD_ORDER) 211 bsdtar->day_first = (*nl_langinfo(D_MD_ORDER) == 'd'); 212 #endif 213 possible_help_request = 0; 214 215 /* Look up uid of current user for future reference */ 216 bsdtar->user_uid = geteuid(); 217 218 /* Default: open tape drive. */ 219 bsdtar->filename = getenv("TAPE"); 220 if (bsdtar->filename == NULL) 221 bsdtar->filename = _PATH_DEFTAPE; 222 223 /* Default block size settings. */ 224 bsdtar->bytes_per_block = DEFAULT_BYTES_PER_BLOCK; 225 /* Allow library to default this unless user specifies -b. */ 226 bsdtar->bytes_in_last_block = -1; 227 228 /* Default: preserve mod time on extract */ 229 bsdtar->extract_flags = ARCHIVE_EXTRACT_TIME; 230 231 /* Default: Perform basic security checks. */ 232 bsdtar->extract_flags |= SECURITY; 233 234 /* Default: Extract atomically if possible */ 235 bsdtar->extract_flags |= ARCHIVE_EXTRACT_ATOMIC; 236 237 #ifndef _WIN32 238 /* On POSIX systems, assume --same-owner and -p when run by 239 * the root user. This doesn't make any sense on Windows. */ 240 if (bsdtar->user_uid == 0) { 241 /* --same-owner */ 242 bsdtar->extract_flags |= ARCHIVE_EXTRACT_OWNER; 243 /* -p */ 244 bsdtar->extract_flags |= ARCHIVE_EXTRACT_PERM; 245 bsdtar->extract_flags |= ARCHIVE_EXTRACT_ACL; 246 bsdtar->extract_flags |= ARCHIVE_EXTRACT_XATTR; 247 bsdtar->extract_flags |= ARCHIVE_EXTRACT_FFLAGS; 248 bsdtar->extract_flags |= ARCHIVE_EXTRACT_MAC_METADATA; 249 } 250 #endif 251 252 /* 253 * Enable Mac OS "copyfile()" extension by default. 254 * This has no effect on other platforms. 255 */ 256 bsdtar->readdisk_flags |= ARCHIVE_READDISK_MAC_COPYFILE; 257 #ifdef COPYFILE_DISABLE_VAR 258 if (getenv(COPYFILE_DISABLE_VAR)) 259 bsdtar->readdisk_flags &= ~ARCHIVE_READDISK_MAC_COPYFILE; 260 #endif 261 #if defined(__APPLE__) 262 /* 263 * On Mac OS ACLs are archived with copyfile() (--mac-metadata) 264 * Translation to NFSv4 ACLs has to be requested explicitly with --acls 265 */ 266 bsdtar->readdisk_flags |= ARCHIVE_READDISK_NO_ACL; 267 #endif 268 269 bsdtar->matching = archive_match_new(); 270 if (bsdtar->matching == NULL) 271 lafe_errc(1, errno, "Out of memory"); 272 bsdtar->cset = cset_new(); 273 if (bsdtar->cset == NULL) 274 lafe_errc(1, errno, "Out of memory"); 275 276 bsdtar->argv = argv; 277 bsdtar->argc = argc; 278 279 /* 280 * Comments following each option indicate where that option 281 * originated: SUSv2, POSIX, GNU tar, star, etc. If there's 282 * no such comment, then I don't know of anyone else who 283 * implements that option. 284 */ 285 while ((opt = bsdtar_getopt(bsdtar)) != -1) { 286 switch (opt) { 287 case 'a': /* GNU tar */ 288 bsdtar->flags |= OPTFLAG_AUTO_COMPRESS; 289 break; 290 case OPTION_ACLS: /* GNU tar */ 291 bsdtar->extract_flags |= ARCHIVE_EXTRACT_ACL; 292 bsdtar->readdisk_flags &= ~ARCHIVE_READDISK_NO_ACL; 293 bsdtar->flags |= OPTFLAG_ACLS; 294 break; 295 case 'B': /* GNU tar */ 296 /* libarchive doesn't need this; just ignore it. */ 297 break; 298 case 'b': /* SUSv2 */ 299 errno = 0; 300 tptr = NULL; 301 t = (int)strtol(bsdtar->argument, &tptr, 10); 302 if (errno || t <= 0 || t > 8192 || 303 *(bsdtar->argument) == '\0' || tptr == NULL || 304 *tptr != '\0') { 305 lafe_errc(1, 0, "Invalid or out of range " 306 "(1..8192) argument to -b"); 307 } 308 bsdtar->bytes_per_block = 512 * t; 309 /* Explicit -b forces last block size. */ 310 bsdtar->bytes_in_last_block = bsdtar->bytes_per_block; 311 break; 312 case OPTION_B64ENCODE: 313 if (compression2 != '\0') 314 lafe_errc(1, 0, 315 "Can't specify both --uuencode and " 316 "--b64encode"); 317 compression2 = opt; 318 compression2_name = "b64encode"; 319 break; 320 case 'C': /* GNU tar */ 321 if (strlen(bsdtar->argument) == 0) 322 lafe_errc(1, 0, 323 "Meaningless option: -C ''"); 324 325 set_chdir(bsdtar, bsdtar->argument); 326 break; 327 case 'c': /* SUSv2 */ 328 set_mode(bsdtar, opt); 329 break; 330 case OPTION_CHECK_LINKS: /* GNU tar */ 331 bsdtar->flags |= OPTFLAG_WARN_LINKS; 332 break; 333 case OPTION_CHROOT: /* NetBSD */ 334 bsdtar->flags |= OPTFLAG_CHROOT; 335 break; 336 case OPTION_CLEAR_NOCHANGE_FFLAGS: 337 bsdtar->extract_flags |= 338 ARCHIVE_EXTRACT_CLEAR_NOCHANGE_FFLAGS; 339 break; 340 case OPTION_EXCLUDE: /* GNU tar */ 341 if (archive_match_exclude_pattern( 342 bsdtar->matching, bsdtar->argument) != ARCHIVE_OK) 343 lafe_errc(1, 0, 344 "Couldn't exclude %s\n", bsdtar->argument); 345 break; 346 case OPTION_EXCLUDE_VCS: /* GNU tar */ 347 for(t=0; vcs_files[t]; t++) { 348 if (archive_match_exclude_pattern( 349 bsdtar->matching, 350 vcs_files[t]) != ARCHIVE_OK) 351 lafe_errc(1, 0, "Couldn't " 352 "exclude %s\n", vcs_files[t]); 353 } 354 break; 355 case OPTION_FFLAGS: 356 bsdtar->extract_flags |= ARCHIVE_EXTRACT_FFLAGS; 357 bsdtar->readdisk_flags &= ~ARCHIVE_READDISK_NO_FFLAGS; 358 bsdtar->flags |= OPTFLAG_FFLAGS; 359 break; 360 case OPTION_FORMAT: /* GNU tar, others */ 361 cset_set_format(bsdtar->cset, bsdtar->argument); 362 break; 363 case 'f': /* SUSv2 */ 364 bsdtar->filename = bsdtar->argument; 365 break; 366 case OPTION_GID: /* cpio */ 367 errno = 0; 368 tptr = NULL; 369 t = (int)strtol(bsdtar->argument, &tptr, 10); 370 if (errno || t < 0 || *(bsdtar->argument) == '\0' || 371 tptr == NULL || *tptr != '\0') { 372 lafe_errc(1, 0, "Invalid argument to --gid"); 373 } 374 bsdtar->gid = t; 375 break; 376 case OPTION_GNAME: /* cpio */ 377 bsdtar->gname = bsdtar->argument; 378 break; 379 case OPTION_GRZIP: 380 if (compression != '\0') 381 lafe_errc(1, 0, 382 "Can't specify both -%c and -%c", opt, 383 compression); 384 compression = opt; 385 compression_name = "grzip"; 386 break; 387 case 'H': /* BSD convention */ 388 bsdtar->symlink_mode = 'H'; 389 break; 390 case 'h': /* Linux Standards Base, gtar; synonym for -L */ 391 bsdtar->symlink_mode = 'L'; 392 /* Hack: -h by itself is the "help" command. */ 393 possible_help_request = 1; 394 break; 395 case OPTION_HELP: /* GNU tar, others */ 396 long_help(); 397 exit(0); 398 break; 399 case OPTION_HFS_COMPRESSION: /* Mac OS X v10.6 or later */ 400 bsdtar->extract_flags |= 401 ARCHIVE_EXTRACT_HFS_COMPRESSION_FORCED; 402 break; 403 case OPTION_IGNORE_ZEROS: 404 bsdtar->flags |= OPTFLAG_IGNORE_ZEROS; 405 break; 406 case 'I': /* GNU tar */ 407 /* 408 * TODO: Allow 'names' to come from an archive, 409 * not just a text file. Design a good UI for 410 * allowing names and mode/owner to be read 411 * from an archive, with contents coming from 412 * disk. This can be used to "refresh" an 413 * archive or to design archives with special 414 * permissions without having to create those 415 * permissions on disk. 416 */ 417 bsdtar->names_from_file = bsdtar->argument; 418 break; 419 case OPTION_INCLUDE: 420 /* 421 * No one else has the @archive extension, so 422 * no one else needs this to filter entries 423 * when transforming archives. 424 */ 425 if (archive_match_include_pattern(bsdtar->matching, 426 bsdtar->argument) != ARCHIVE_OK) 427 lafe_errc(1, 0, 428 "Failed to add %s to inclusion list", 429 bsdtar->argument); 430 break; 431 case 'j': /* GNU tar */ 432 if (compression != '\0') 433 lafe_errc(1, 0, 434 "Can't specify both -%c and -%c", opt, 435 compression); 436 compression = opt; 437 compression_name = "bzip2"; 438 break; 439 case 'J': /* GNU tar 1.21 and later */ 440 if (compression != '\0') 441 lafe_errc(1, 0, 442 "Can't specify both -%c and -%c", opt, 443 compression); 444 compression = opt; 445 compression_name = "xz"; 446 break; 447 case 'k': /* GNU tar */ 448 bsdtar->extract_flags |= ARCHIVE_EXTRACT_NO_OVERWRITE; 449 break; 450 case OPTION_KEEP_NEWER_FILES: /* GNU tar */ 451 bsdtar->extract_flags |= ARCHIVE_EXTRACT_NO_OVERWRITE_NEWER; 452 break; 453 case 'L': /* BSD convention */ 454 bsdtar->symlink_mode = 'L'; 455 break; 456 case 'l': /* SUSv2 and GNU tar beginning with 1.16 */ 457 /* GNU tar 1.13 used -l for --one-file-system */ 458 bsdtar->flags |= OPTFLAG_WARN_LINKS; 459 break; 460 case OPTION_LRZIP: 461 case OPTION_LZ4: 462 case OPTION_LZIP: /* GNU tar beginning with 1.23 */ 463 case OPTION_LZMA: /* GNU tar beginning with 1.20 */ 464 case OPTION_LZOP: /* GNU tar beginning with 1.21 */ 465 case OPTION_ZSTD: 466 if (compression != '\0') 467 lafe_errc(1, 0, 468 "Can't specify both -%c and -%c", opt, 469 compression); 470 compression = opt; 471 switch (opt) { 472 case OPTION_LRZIP: compression_name = "lrzip"; break; 473 case OPTION_LZ4: compression_name = "lz4"; break; 474 case OPTION_LZIP: compression_name = "lzip"; break; 475 case OPTION_LZMA: compression_name = "lzma"; break; 476 case OPTION_LZOP: compression_name = "lzop"; break; 477 case OPTION_ZSTD: compression_name = "zstd"; break; 478 } 479 break; 480 case 'm': /* SUSv2 */ 481 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_TIME; 482 break; 483 case OPTION_MAC_METADATA: /* Mac OS X */ 484 bsdtar->readdisk_flags |= ARCHIVE_READDISK_MAC_COPYFILE; 485 bsdtar->extract_flags |= ARCHIVE_EXTRACT_MAC_METADATA; 486 bsdtar->flags |= OPTFLAG_MAC_METADATA; 487 break; 488 case 'n': /* GNU tar */ 489 bsdtar->flags |= OPTFLAG_NO_SUBDIRS; 490 break; 491 /* 492 * Selecting files by time: 493 * --newer-?time='date' Only files newer than 'date' 494 * --newer-?time-than='file' Only files newer than time 495 * on specified file (useful for incremental backups) 496 */ 497 case OPTION_NEWER_CTIME: /* GNU tar */ 498 if (archive_match_include_date(bsdtar->matching, 499 ARCHIVE_MATCH_CTIME | ARCHIVE_MATCH_NEWER, 500 bsdtar->argument) != ARCHIVE_OK) 501 lafe_errc(1, 0, "Error : %s", 502 archive_error_string(bsdtar->matching)); 503 break; 504 case OPTION_NEWER_CTIME_THAN: 505 if (archive_match_include_file_time(bsdtar->matching, 506 ARCHIVE_MATCH_CTIME | ARCHIVE_MATCH_NEWER, 507 bsdtar->argument) != ARCHIVE_OK) 508 lafe_errc(1, 0, "Error : %s", 509 archive_error_string(bsdtar->matching)); 510 break; 511 case OPTION_NEWER_MTIME: /* GNU tar */ 512 if (archive_match_include_date(bsdtar->matching, 513 ARCHIVE_MATCH_MTIME | ARCHIVE_MATCH_NEWER, 514 bsdtar->argument) != ARCHIVE_OK) 515 lafe_errc(1, 0, "Error : %s", 516 archive_error_string(bsdtar->matching)); 517 break; 518 case OPTION_NEWER_MTIME_THAN: 519 if (archive_match_include_file_time(bsdtar->matching, 520 ARCHIVE_MATCH_MTIME | ARCHIVE_MATCH_NEWER, 521 bsdtar->argument) != ARCHIVE_OK) 522 lafe_errc(1, 0, "Error : %s", 523 archive_error_string(bsdtar->matching)); 524 break; 525 case OPTION_NODUMP: /* star */ 526 bsdtar->readdisk_flags |= ARCHIVE_READDISK_HONOR_NODUMP; 527 break; 528 case OPTION_NOPRESERVE_HFS_COMPRESSION: 529 /* Mac OS X v10.6 or later */ 530 bsdtar->extract_flags |= 531 ARCHIVE_EXTRACT_NO_HFS_COMPRESSION; 532 break; 533 case OPTION_NO_ACLS: /* GNU tar */ 534 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_ACL; 535 bsdtar->readdisk_flags |= ARCHIVE_READDISK_NO_ACL; 536 bsdtar->flags |= OPTFLAG_NO_ACLS; 537 break; 538 case OPTION_NO_FFLAGS: 539 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_FFLAGS; 540 bsdtar->readdisk_flags |= ARCHIVE_READDISK_NO_FFLAGS; 541 bsdtar->flags |= OPTFLAG_NO_FFLAGS; 542 break; 543 case OPTION_NO_MAC_METADATA: /* Mac OS X */ 544 bsdtar->readdisk_flags &= ~ARCHIVE_READDISK_MAC_COPYFILE; 545 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_MAC_METADATA; 546 bsdtar->flags |= OPTFLAG_NO_MAC_METADATA; 547 break; 548 case OPTION_NO_SAME_OWNER: /* GNU tar */ 549 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_OWNER; 550 break; 551 case OPTION_NO_SAME_PERMISSIONS: /* GNU tar */ 552 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_PERM; 553 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_ACL; 554 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_XATTR; 555 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_FFLAGS; 556 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_MAC_METADATA; 557 break; 558 case OPTION_NO_XATTRS: /* GNU tar */ 559 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_XATTR; 560 bsdtar->readdisk_flags |= ARCHIVE_READDISK_NO_XATTR; 561 bsdtar->flags |= OPTFLAG_NO_XATTRS; 562 break; 563 case OPTION_NULL: /* GNU tar */ 564 bsdtar->flags |= OPTFLAG_NULL; 565 break; 566 case OPTION_NUMERIC_OWNER: /* GNU tar */ 567 bsdtar->uname = ""; 568 bsdtar->gname = ""; 569 bsdtar->flags |= OPTFLAG_NUMERIC_OWNER; 570 break; 571 case 'O': /* GNU tar */ 572 bsdtar->flags |= OPTFLAG_STDOUT; 573 break; 574 case 'o': /* SUSv2 and GNU conflict here, but not fatally */ 575 bsdtar->flags |= OPTFLAG_O; 576 break; 577 /* 578 * Selecting files by time: 579 * --older-?time='date' Only files older than 'date' 580 * --older-?time-than='file' Only files older than time 581 * on specified file 582 */ 583 case OPTION_OLDER_CTIME: 584 if (archive_match_include_date(bsdtar->matching, 585 ARCHIVE_MATCH_CTIME | ARCHIVE_MATCH_OLDER, 586 bsdtar->argument) != ARCHIVE_OK) 587 lafe_errc(1, 0, "Error : %s", 588 archive_error_string(bsdtar->matching)); 589 break; 590 case OPTION_OLDER_CTIME_THAN: 591 if (archive_match_include_file_time(bsdtar->matching, 592 ARCHIVE_MATCH_CTIME | ARCHIVE_MATCH_OLDER, 593 bsdtar->argument) != ARCHIVE_OK) 594 lafe_errc(1, 0, "Error : %s", 595 archive_error_string(bsdtar->matching)); 596 break; 597 case OPTION_OLDER_MTIME: 598 if (archive_match_include_date(bsdtar->matching, 599 ARCHIVE_MATCH_MTIME | ARCHIVE_MATCH_OLDER, 600 bsdtar->argument) != ARCHIVE_OK) 601 lafe_errc(1, 0, "Error : %s", 602 archive_error_string(bsdtar->matching)); 603 break; 604 case OPTION_OLDER_MTIME_THAN: 605 if (archive_match_include_file_time(bsdtar->matching, 606 ARCHIVE_MATCH_MTIME | ARCHIVE_MATCH_OLDER, 607 bsdtar->argument) != ARCHIVE_OK) 608 lafe_errc(1, 0, "Error : %s", 609 archive_error_string(bsdtar->matching)); 610 break; 611 case OPTION_ONE_FILE_SYSTEM: /* GNU tar */ 612 bsdtar->readdisk_flags |= 613 ARCHIVE_READDISK_NO_TRAVERSE_MOUNTS; 614 break; 615 case OPTION_OPTIONS: 616 bsdtar->option_options = bsdtar->argument; 617 break; 618 #if 0 619 /* 620 * The common BSD -P option is not necessary, since 621 * our default is to archive symlinks, not follow 622 * them. This is convenient, as -P conflicts with GNU 623 * tar anyway. 624 */ 625 case 'P': /* BSD convention */ 626 /* Default behavior, no option necessary. */ 627 break; 628 #endif 629 case 'P': /* GNU tar */ 630 bsdtar->extract_flags &= ~SECURITY; 631 bsdtar->flags |= OPTFLAG_ABSOLUTE_PATHS; 632 break; 633 case 'p': /* GNU tar, star */ 634 bsdtar->extract_flags |= ARCHIVE_EXTRACT_PERM; 635 bsdtar->extract_flags |= ARCHIVE_EXTRACT_ACL; 636 bsdtar->extract_flags |= ARCHIVE_EXTRACT_XATTR; 637 bsdtar->extract_flags |= ARCHIVE_EXTRACT_FFLAGS; 638 bsdtar->extract_flags |= ARCHIVE_EXTRACT_MAC_METADATA; 639 break; 640 case OPTION_PASSPHRASE: 641 bsdtar->passphrase = bsdtar->argument; 642 break; 643 case OPTION_POSIX: /* GNU tar */ 644 cset_set_format(bsdtar->cset, "pax"); 645 break; 646 case 'q': /* FreeBSD GNU tar --fast-read, NetBSD -q */ 647 bsdtar->flags |= OPTFLAG_FAST_READ; 648 break; 649 case 'r': /* SUSv2 */ 650 set_mode(bsdtar, opt); 651 break; 652 case 'S': /* NetBSD pax-as-tar */ 653 bsdtar->extract_flags |= ARCHIVE_EXTRACT_SPARSE; 654 break; 655 case 's': /* NetBSD pax-as-tar */ 656 #if defined(HAVE_REGEX_H) || defined(HAVE_PCREPOSIX_H) 657 add_substitution(bsdtar, bsdtar->argument); 658 #else 659 lafe_warnc(0, 660 "-s is not supported by this version of bsdtar"); 661 usage(); 662 #endif 663 break; 664 case OPTION_SAME_OWNER: /* GNU tar */ 665 bsdtar->extract_flags |= ARCHIVE_EXTRACT_OWNER; 666 break; 667 case OPTION_STRIP_COMPONENTS: /* GNU tar 1.15 */ 668 errno = 0; 669 tptr = NULL; 670 t = (int)strtol(bsdtar->argument, &tptr, 10); 671 if (errno || t < 0 || *(bsdtar->argument) == '\0' || 672 tptr == NULL || *tptr != '\0') { 673 lafe_errc(1, 0, "Invalid argument to " 674 "--strip-components"); 675 } 676 bsdtar->strip_components = t; 677 break; 678 case 'T': /* GNU tar */ 679 bsdtar->names_from_file = bsdtar->argument; 680 break; 681 case 't': /* SUSv2 */ 682 set_mode(bsdtar, opt); 683 bsdtar->verbose++; 684 break; 685 case OPTION_TOTALS: /* GNU tar */ 686 bsdtar->flags |= OPTFLAG_TOTALS; 687 break; 688 case 'U': /* GNU tar */ 689 bsdtar->extract_flags |= ARCHIVE_EXTRACT_UNLINK; 690 bsdtar->flags |= OPTFLAG_UNLINK_FIRST; 691 break; 692 case 'u': /* SUSv2 */ 693 set_mode(bsdtar, opt); 694 break; 695 case OPTION_UID: /* cpio */ 696 errno = 0; 697 tptr = NULL; 698 t = (int)strtol(bsdtar->argument, &tptr, 10); 699 if (errno || t < 0 || *(bsdtar->argument) == '\0' || 700 tptr == NULL || *tptr != '\0') { 701 lafe_errc(1, 0, "Invalid argument to --uid"); 702 } 703 bsdtar->uid = t; 704 break; 705 case OPTION_UNAME: /* cpio */ 706 bsdtar->uname = bsdtar->argument; 707 break; 708 case OPTION_UUENCODE: 709 if (compression2 != '\0') 710 lafe_errc(1, 0, 711 "Can't specify both --uuencode and " 712 "--b64encode"); 713 compression2 = opt; 714 compression2_name = "uuencode"; 715 break; 716 case 'v': /* SUSv2 */ 717 bsdtar->verbose++; 718 break; 719 case OPTION_VERSION: /* GNU convention */ 720 version(); 721 break; 722 #if 0 723 /* 724 * The -W longopt feature is handled inside of 725 * bsdtar_getopt(), so -W is not available here. 726 */ 727 case 'W': /* Obscure GNU convention. */ 728 break; 729 #endif 730 case 'w': /* SUSv2 */ 731 bsdtar->flags |= OPTFLAG_INTERACTIVE; 732 break; 733 case 'X': /* GNU tar */ 734 if (archive_match_exclude_pattern_from_file( 735 bsdtar->matching, bsdtar->argument, 0) 736 != ARCHIVE_OK) 737 lafe_errc(1, 0, "Error : %s", 738 archive_error_string(bsdtar->matching)); 739 break; 740 case 'x': /* SUSv2 */ 741 set_mode(bsdtar, opt); 742 break; 743 case OPTION_XATTRS: /* GNU tar */ 744 bsdtar->extract_flags |= ARCHIVE_EXTRACT_XATTR; 745 bsdtar->readdisk_flags &= ~ARCHIVE_READDISK_NO_XATTR; 746 bsdtar->flags |= OPTFLAG_XATTRS; 747 break; 748 case 'y': /* FreeBSD version of GNU tar */ 749 if (compression != '\0') 750 lafe_errc(1, 0, 751 "Can't specify both -%c and -%c", opt, 752 compression); 753 compression = opt; 754 compression_name = "bzip2"; 755 break; 756 case 'Z': /* GNU tar */ 757 if (compression != '\0') 758 lafe_errc(1, 0, 759 "Can't specify both -%c and -%c", opt, 760 compression); 761 compression = opt; 762 compression_name = "compress"; 763 break; 764 case 'z': /* GNU tar, star, many others */ 765 if (compression != '\0') 766 lafe_errc(1, 0, 767 "Can't specify both -%c and -%c", opt, 768 compression); 769 compression = opt; 770 compression_name = "gzip"; 771 break; 772 case OPTION_USE_COMPRESS_PROGRAM: 773 compress_program = bsdtar->argument; 774 break; 775 default: 776 usage(); 777 } 778 } 779 780 /* 781 * Sanity-check options. 782 */ 783 784 /* If no "real" mode was specified, treat -h as --help. */ 785 if ((bsdtar->mode == '\0') && possible_help_request) { 786 long_help(); 787 exit(0); 788 } 789 790 /* Otherwise, a mode is required. */ 791 if (bsdtar->mode == '\0') 792 lafe_errc(1, 0, 793 "Must specify one of -c, -r, -t, -u, -x"); 794 795 /* Check boolean options only permitted in certain modes. */ 796 if (bsdtar->flags & OPTFLAG_AUTO_COMPRESS) 797 only_mode(bsdtar, "-a", "c"); 798 if (bsdtar->readdisk_flags & ARCHIVE_READDISK_NO_TRAVERSE_MOUNTS) 799 only_mode(bsdtar, "--one-file-system", "cru"); 800 if (bsdtar->flags & OPTFLAG_FAST_READ) 801 only_mode(bsdtar, "--fast-read", "xt"); 802 if (bsdtar->extract_flags & ARCHIVE_EXTRACT_HFS_COMPRESSION_FORCED) 803 only_mode(bsdtar, "--hfsCompression", "x"); 804 if (bsdtar->extract_flags & ARCHIVE_EXTRACT_NO_HFS_COMPRESSION) 805 only_mode(bsdtar, "--nopreserveHFSCompression", "x"); 806 if (bsdtar->readdisk_flags & ARCHIVE_READDISK_HONOR_NODUMP) 807 only_mode(bsdtar, "--nodump", "cru"); 808 if (bsdtar->flags & OPTFLAG_ACLS) 809 only_mode(bsdtar, "--acls", "crux"); 810 if (bsdtar->flags & OPTFLAG_NO_ACLS) 811 only_mode(bsdtar, "--no-acls", "crux"); 812 if (bsdtar->flags & OPTFLAG_XATTRS) 813 only_mode(bsdtar, "--xattrs", "crux"); 814 if (bsdtar->flags & OPTFLAG_NO_XATTRS) 815 only_mode(bsdtar, "--no-xattrs", "crux"); 816 if (bsdtar->flags & OPTFLAG_FFLAGS) 817 only_mode(bsdtar, "--fflags", "crux"); 818 if (bsdtar->flags & OPTFLAG_NO_FFLAGS) 819 only_mode(bsdtar, "--no-fflags", "crux"); 820 if (bsdtar->flags & OPTFLAG_MAC_METADATA) 821 only_mode(bsdtar, "--mac-metadata", "crux"); 822 if (bsdtar->flags & OPTFLAG_NO_MAC_METADATA) 823 only_mode(bsdtar, "--no-mac-metadata", "crux"); 824 if (bsdtar->flags & OPTFLAG_O) { 825 switch (bsdtar->mode) { 826 case 'c': 827 /* 828 * In GNU tar, -o means "old format." The 829 * "ustar" format is the closest thing 830 * supported by libarchive. 831 */ 832 cset_set_format(bsdtar->cset, "ustar"); 833 /* TODO: bsdtar->create_format = "v7"; */ 834 break; 835 case 'x': 836 /* POSIX-compatible behavior. */ 837 bsdtar->flags |= OPTFLAG_NO_OWNER; 838 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_OWNER; 839 break; 840 default: 841 only_mode(bsdtar, "-o", "xc"); 842 break; 843 } 844 } 845 if (bsdtar->flags & OPTFLAG_STDOUT) 846 only_mode(bsdtar, "-O", "xt"); 847 if (bsdtar->flags & OPTFLAG_UNLINK_FIRST) 848 only_mode(bsdtar, "-U", "x"); 849 if (bsdtar->flags & OPTFLAG_WARN_LINKS) 850 only_mode(bsdtar, "--check-links", "cr"); 851 852 if ((bsdtar->flags & OPTFLAG_AUTO_COMPRESS) && 853 cset_auto_compress(bsdtar->cset, bsdtar->filename)) { 854 /* Ignore specified compressions if auto-compress works. */ 855 compression = '\0'; 856 compression2 = '\0'; 857 } 858 /* Check other parameters only permitted in certain modes. */ 859 if (compress_program != NULL) { 860 only_mode(bsdtar, "--use-compress-program", "cxt"); 861 cset_add_filter_program(bsdtar->cset, compress_program); 862 /* Ignore specified compressions. */ 863 compression = '\0'; 864 compression2 = '\0'; 865 } 866 if (compression != '\0') { 867 switch (compression) { 868 case 'J': case 'j': case 'y': case 'Z': case 'z': 869 strcpy(buff, "-?"); 870 buff[1] = compression; 871 break; 872 default: 873 strcpy(buff, "--"); 874 strcat(buff, compression_name); 875 break; 876 } 877 only_mode(bsdtar, buff, "cxt"); 878 cset_add_filter(bsdtar->cset, compression_name); 879 } 880 if (compression2 != '\0') { 881 strcpy(buff, "--"); 882 strcat(buff, compression2_name); 883 only_mode(bsdtar, buff, "cxt"); 884 cset_add_filter(bsdtar->cset, compression2_name); 885 } 886 if (cset_get_format(bsdtar->cset) != NULL) 887 only_mode(bsdtar, "--format", "cru"); 888 if (bsdtar->symlink_mode != '\0') { 889 strcpy(buff, "-?"); 890 buff[1] = bsdtar->symlink_mode; 891 only_mode(bsdtar, buff, "cru"); 892 } 893 894 /* 895 * When creating an archive from a directory tree, the directory 896 * walking code will already avoid entering directories when 897 * recursive inclusion of directory content is disabled, therefore 898 * changing the matching behavior has no effect for creation modes. 899 * It is relevant for extraction or listing. 900 */ 901 archive_match_set_inclusion_recursion(bsdtar->matching, 902 !(bsdtar->flags & OPTFLAG_NO_SUBDIRS)); 903 904 /* Filename "-" implies stdio. */ 905 if (strcmp(bsdtar->filename, "-") == 0) 906 bsdtar->filename = NULL; 907 908 switch(bsdtar->mode) { 909 case 'c': 910 tar_mode_c(bsdtar); 911 break; 912 case 'r': 913 tar_mode_r(bsdtar); 914 break; 915 case 't': 916 tar_mode_t(bsdtar); 917 break; 918 case 'u': 919 tar_mode_u(bsdtar); 920 break; 921 case 'x': 922 tar_mode_x(bsdtar); 923 break; 924 } 925 926 archive_match_free(bsdtar->matching); 927 #if defined(HAVE_REGEX_H) || defined(HAVE_PCREPOSIX_H) 928 cleanup_substitution(bsdtar); 929 #endif 930 cset_free(bsdtar->cset); 931 passphrase_free(bsdtar->ppbuff); 932 933 if (bsdtar->return_value != 0) 934 lafe_warnc(0, 935 "Error exit delayed from previous errors."); 936 return (bsdtar->return_value); 937 } 938 939 static void 940 set_mode(struct bsdtar *bsdtar, char opt) 941 { 942 if (bsdtar->mode != '\0' && bsdtar->mode != opt) 943 lafe_errc(1, 0, 944 "Can't specify both -%c and -%c", opt, bsdtar->mode); 945 bsdtar->mode = opt; 946 } 947 948 /* 949 * Verify that the mode is correct. 950 */ 951 static void 952 only_mode(struct bsdtar *bsdtar, const char *opt, const char *valid_modes) 953 { 954 if (strchr(valid_modes, bsdtar->mode) == NULL) 955 lafe_errc(1, 0, 956 "Option %s is not permitted in mode -%c", 957 opt, bsdtar->mode); 958 } 959 960 961 void 962 usage(void) 963 { 964 const char *p; 965 966 p = lafe_getprogname(); 967 968 fprintf(stderr, "Usage:\n"); 969 fprintf(stderr, " List: %s -tf <archive-filename>\n", p); 970 fprintf(stderr, " Extract: %s -xf <archive-filename>\n", p); 971 fprintf(stderr, " Create: %s -cf <archive-filename> [filenames...]\n", p); 972 fprintf(stderr, " Help: %s --help\n", p); 973 exit(1); 974 } 975 976 static void 977 version(void) 978 { 979 printf("bsdtar %s - %s \n", 980 BSDTAR_VERSION_STRING, 981 archive_version_details()); 982 exit(0); 983 } 984 985 static const char *long_help_msg = 986 "First option must be a mode specifier:\n" 987 " -c Create -r Add/Replace -t List -u Update -x Extract\n" 988 "Common Options:\n" 989 " -b # Use # 512-byte records per I/O block\n" 990 " -f <filename> Location of archive (default " _PATH_DEFTAPE ")\n" 991 " -v Verbose\n" 992 " -w Interactive\n" 993 "Create: %p -c [options] [<file> | <dir> | @<archive> | -C <dir> ]\n" 994 " <file>, <dir> add these items to archive\n" 995 " -z, -j, -J, --lzma Compress archive with gzip/bzip2/xz/lzma\n" 996 " --format {ustar|pax|cpio|shar} Select archive format\n" 997 " --exclude <pattern> Skip files that match pattern\n" 998 " -C <dir> Change to <dir> before processing remaining files\n" 999 " @<archive> Add entries from <archive> to output\n" 1000 "List: %p -t [options] [<patterns>]\n" 1001 " <patterns> If specified, list only entries that match\n" 1002 "Extract: %p -x [options] [<patterns>]\n" 1003 " <patterns> If specified, extract only entries that match\n" 1004 " -k Keep (don't overwrite) existing files\n" 1005 " -m Don't restore modification times\n" 1006 " -O Write entries to stdout, don't restore to disk\n" 1007 " -p Restore permissions (including ACLs, owner, file flags)\n"; 1008 1009 1010 /* 1011 * Note that the word 'bsdtar' will always appear in the first line 1012 * of output. 1013 * 1014 * In particular, /bin/sh scripts that need to test for the presence 1015 * of bsdtar can use the following template: 1016 * 1017 * if (tar --help 2>&1 | grep bsdtar >/dev/null 2>&1 ) then \ 1018 * echo bsdtar; else echo not bsdtar; fi 1019 */ 1020 static void 1021 long_help(void) 1022 { 1023 const char *prog; 1024 const char *p; 1025 1026 prog = lafe_getprogname(); 1027 1028 fflush(stderr); 1029 1030 p = (strcmp(prog,"bsdtar") != 0) ? "(bsdtar)" : ""; 1031 printf("%s%s: manipulate archive files\n", prog, p); 1032 1033 for (p = long_help_msg; *p != '\0'; p++) { 1034 if (*p == '%') { 1035 if (p[1] == 'p') { 1036 fputs(prog, stdout); 1037 p++; 1038 } else 1039 putchar('%'); 1040 } else 1041 putchar(*p); 1042 } 1043 version(); 1044 } 1045