bsdtar.c revision 1.1.1.7
1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2003-2008 Tim Kientzle 5 * All rights reserved. 6 */ 7 8 #include "bsdtar_platform.h" 9 10 #ifdef HAVE_LIMITS_H 11 #include <limits.h> 12 #endif 13 #ifdef HAVE_SYS_PARAM_H 14 #include <sys/param.h> 15 #endif 16 #ifdef HAVE_SYS_STAT_H 17 #include <sys/stat.h> 18 #endif 19 #ifdef HAVE_COPYFILE_H 20 #include <copyfile.h> 21 #endif 22 #ifdef HAVE_ERRNO_H 23 #include <errno.h> 24 #endif 25 #ifdef HAVE_FCNTL_H 26 #include <fcntl.h> 27 #endif 28 #ifdef HAVE_LANGINFO_H 29 #include <langinfo.h> 30 #endif 31 #ifdef HAVE_LIMITS_H 32 #include <limits.h> 33 #endif 34 #ifdef HAVE_LOCALE_H 35 #include <locale.h> 36 #endif 37 #ifdef HAVE_PATHS_H 38 #include <paths.h> 39 #endif 40 #ifdef HAVE_SIGNAL_H 41 #include <signal.h> 42 #endif 43 #include <stdio.h> 44 #ifdef HAVE_STDLIB_H 45 #include <stdlib.h> 46 #endif 47 #ifdef HAVE_STRING_H 48 #include <string.h> 49 #endif 50 #ifdef HAVE_TIME_H 51 #include <time.h> 52 #endif 53 #ifdef HAVE_UNISTD_H 54 #include <unistd.h> 55 #endif 56 57 #include "bsdtar.h" 58 #include "lafe_err.h" 59 60 #if ARCHIVE_VERSION_NUMBER < 4000000 && !defined(_PATH_DEFTAPE) 61 // Libarchive 4.0 and later will NOT define _PATH_DEFTAPE 62 // but will honor it if it's set in the build. 63 // Until then, we'll continue to set it by default on certain platforms: 64 #if defined(__linux) 65 #define _PATH_DEFTAPE "/dev/st0" 66 #elif defined(_WIN32) && !defined(__CYGWIN__) 67 #define _PATH_DEFTAPE "\\\\.\\tape0" 68 #elif !defined(__APPLE__) 69 #define _PATH_DEFTAPE "/dev/tape" 70 #endif 71 #endif 72 73 #define _PATH_STDIO "-" 74 75 #ifdef __MINGW32__ 76 int _CRT_glob = 0; /* Disable broken CRT globbing. */ 77 #endif 78 79 #if defined(HAVE_SIGACTION) && (defined(SIGINFO) || defined(SIGUSR1)) 80 static volatile int siginfo_occurred; 81 82 static void 83 siginfo_handler(int sig) 84 { 85 (void)sig; /* UNUSED */ 86 siginfo_occurred = 1; 87 } 88 89 int 90 need_report(void) 91 { 92 int r = siginfo_occurred; 93 siginfo_occurred = 0; 94 return (r); 95 } 96 #else 97 int 98 need_report(void) 99 { 100 return (0); 101 } 102 #endif 103 104 static __LA_NORETURN void long_help(void); 105 static void only_mode(struct bsdtar *, const char *opt, 106 const char *valid); 107 static void set_mode(struct bsdtar *, int opt); 108 static __LA_NORETURN void version(void); 109 110 /* A basic set of security flags to request from libarchive. */ 111 #define SECURITY \ 112 (ARCHIVE_EXTRACT_SECURE_SYMLINKS \ 113 | ARCHIVE_EXTRACT_SECURE_NODOTDOT) 114 115 static char const * const vcs_files[] = { 116 /* CVS */ 117 "CVS", ".cvsignore", 118 /* RCS */ 119 "RCS", 120 /* SCCS */ 121 "SCCS", 122 /* SVN */ 123 ".svn", 124 /* git */ 125 ".git", ".gitignore", ".gitattributes", ".gitmodules", 126 /* Arch */ 127 ".arch-ids", "{arch}", "=RELEASE-ID", "=meta-update", "=update", 128 /* Bazaar */ 129 ".bzr", ".bzrignore", ".bzrtags", 130 /* Mercurial */ 131 ".hg", ".hgignore", ".hgtags", 132 /* darcs */ 133 "_darcs", 134 NULL 135 }; 136 137 int 138 main(int argc, char **argv) 139 { 140 struct bsdtar *bsdtar, bsdtar_storage; 141 int opt, t; 142 int compression, compression2; 143 const char *compression_name, *compression2_name; 144 const char *compress_program; 145 char *tptr, *uptr; 146 char possible_help_request; 147 char buff[16]; 148 long l; 149 time_t now; 150 151 /* 152 * Use a pointer for consistency, but stack-allocated storage 153 * for ease of cleanup. 154 */ 155 bsdtar = &bsdtar_storage; 156 memset(bsdtar, 0, sizeof(*bsdtar)); 157 bsdtar->fd = -1; /* Mark as "unused" */ 158 bsdtar->gid = -1; 159 bsdtar->uid = -1; 160 bsdtar->flags = 0; 161 compression = compression2 = '\0'; 162 compression_name = compression2_name = NULL; 163 compress_program = NULL; 164 time(&now); 165 166 #if defined(HAVE_SIGACTION) 167 { /* Set up signal handling. */ 168 struct sigaction sa; 169 sa.sa_handler = siginfo_handler; 170 sigemptyset(&sa.sa_mask); 171 sa.sa_flags = 0; 172 #ifdef SIGINFO 173 if (sigaction(SIGINFO, &sa, NULL)) 174 lafe_errc(1, errno, "sigaction(SIGINFO) failed"); 175 #endif 176 #ifdef SIGUSR1 177 /* ... and treat SIGUSR1 the same way as SIGINFO. */ 178 if (sigaction(SIGUSR1, &sa, NULL)) 179 lafe_errc(1, errno, "sigaction(SIGUSR1) failed"); 180 #endif 181 #ifdef SIGPIPE 182 /* Ignore SIGPIPE signals. */ 183 sa.sa_handler = SIG_IGN; 184 sigaction(SIGPIPE, &sa, NULL); 185 #endif 186 #ifdef SIGCHLD 187 /* Do not ignore SIGCHLD. */ 188 sa.sa_handler = SIG_DFL; 189 sigaction(SIGCHLD, &sa, NULL); 190 #endif 191 } 192 #endif 193 194 /* Set lafe_progname before calling lafe_warnc. */ 195 lafe_setprogname(*argv, "bsdtar"); 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 defined(_PATH_DEFTAPE) 212 if (bsdtar->filename == NULL) { 213 #if defined(_WIN32) && !defined(__CYGWIN__) 214 int tapeExists = !_access(_PATH_DEFTAPE, 0); 215 #else 216 int tapeExists = !access(_PATH_DEFTAPE, F_OK); 217 #endif 218 if (tapeExists) { 219 bsdtar->filename = _PATH_DEFTAPE; 220 } 221 } 222 #endif 223 if (bsdtar->filename == NULL) { 224 bsdtar->filename = _PATH_STDIO; 225 } 226 227 /* Default block size settings. */ 228 bsdtar->bytes_per_block = DEFAULT_BYTES_PER_BLOCK; 229 /* Allow library to default this unless user specifies -b. */ 230 bsdtar->bytes_in_last_block = -1; 231 232 /* Default: preserve mod time on extract */ 233 bsdtar->extract_flags = ARCHIVE_EXTRACT_TIME; 234 235 /* Default: Perform basic security checks. */ 236 bsdtar->extract_flags |= SECURITY; 237 238 #ifndef _WIN32 239 /* On POSIX systems, assume --same-owner and -p when run by 240 * the root user. This doesn't make any sense on Windows. */ 241 if (bsdtar->user_uid == 0) { 242 /* --same-owner */ 243 bsdtar->extract_flags |= ARCHIVE_EXTRACT_OWNER; 244 /* -p */ 245 bsdtar->extract_flags |= ARCHIVE_EXTRACT_PERM; 246 bsdtar->extract_flags |= ARCHIVE_EXTRACT_ACL; 247 bsdtar->extract_flags |= ARCHIVE_EXTRACT_XATTR; 248 bsdtar->extract_flags |= ARCHIVE_EXTRACT_FFLAGS; 249 bsdtar->extract_flags |= ARCHIVE_EXTRACT_MAC_METADATA; 250 } 251 #endif 252 253 /* 254 * Enable Mac OS "copyfile()" extension by default. 255 * This has no effect on other platforms. 256 */ 257 bsdtar->readdisk_flags |= ARCHIVE_READDISK_MAC_COPYFILE; 258 #ifdef COPYFILE_DISABLE_VAR 259 if (getenv(COPYFILE_DISABLE_VAR)) 260 bsdtar->readdisk_flags &= ~ARCHIVE_READDISK_MAC_COPYFILE; 261 #endif 262 #if defined(__APPLE__) 263 /* 264 * On Mac OS ACLs are archived with copyfile() (--mac-metadata) 265 * Translation to NFSv4 ACLs has to be requested explicitly with --acls 266 */ 267 bsdtar->readdisk_flags |= ARCHIVE_READDISK_NO_ACL; 268 #endif 269 270 bsdtar->matching = archive_match_new(); 271 if (bsdtar->matching == NULL) 272 lafe_errc(1, errno, "Out of memory"); 273 bsdtar->cset = cset_new(); 274 if (bsdtar->cset == NULL) 275 lafe_errc(1, errno, "Out of memory"); 276 277 bsdtar->argv = argv; 278 bsdtar->argc = argc; 279 280 /* 281 * Comments following each option indicate where that option 282 * originated: SUSv2, POSIX, GNU tar, star, etc. If there's 283 * no such comment, then I don't know of anyone else who 284 * implements that option. 285 */ 286 while ((opt = bsdtar_getopt(bsdtar)) != -1) { 287 switch (opt) { 288 case 'a': /* GNU tar */ 289 bsdtar->flags |= OPTFLAG_AUTO_COMPRESS; 290 break; 291 case OPTION_ACLS: /* GNU tar */ 292 bsdtar->extract_flags |= ARCHIVE_EXTRACT_ACL; 293 bsdtar->readdisk_flags &= ~ARCHIVE_READDISK_NO_ACL; 294 bsdtar->flags |= OPTFLAG_ACLS; 295 break; 296 case 'B': /* GNU tar */ 297 /* libarchive doesn't need this; just ignore it. */ 298 break; 299 case 'b': /* SUSv2 */ 300 tptr = NULL; 301 l = strtol(bsdtar->argument, &tptr, 10); 302 if (l <= 0 || l > 8192L || 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 * (int)l; 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", 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", 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 tptr = NULL; 368 l = strtol(bsdtar->argument, &tptr, 10); 369 if (l < 0 || l >= INT_MAX || *(bsdtar->argument) == '\0' || 370 tptr == NULL || *tptr != '\0') { 371 lafe_errc(1, 0, "Invalid argument to --gid"); 372 } 373 bsdtar->gid = (int)l; 374 break; 375 case OPTION_GNAME: /* cpio */ 376 bsdtar->gname = bsdtar->argument; 377 break; 378 case OPTION_GROUP: /* GNU tar */ 379 tptr = NULL; 380 381 uptr = strchr(bsdtar->argument, ':'); 382 if (uptr != NULL) { 383 if (uptr[1] == '\0') { 384 lafe_errc(1, 0, "Invalid argument to --group (missing id after :)"); 385 } 386 uptr[0] = 0; 387 uptr++; 388 l = strtol(uptr, &tptr, 10); 389 if (l < 0 || l >= INT_MAX || *uptr == '\0' || 390 tptr == NULL || *tptr != '\0') { 391 lafe_errc(1, 0, "Invalid argument to --group (%s is not a number)", uptr); 392 } else { 393 bsdtar->gid = (int)l; 394 } 395 bsdtar->gname = bsdtar->argument; 396 } else { 397 l = strtol(bsdtar->argument, &tptr, 10); 398 if (l < 0 || l >= INT_MAX || *(bsdtar->argument) == '\0' || 399 tptr == NULL || *tptr != '\0') { 400 bsdtar->gname = bsdtar->argument; 401 } else { 402 bsdtar->gid = (int)l; 403 bsdtar->gname = ""; 404 } 405 } 406 break; 407 case OPTION_GRZIP: 408 if (compression != '\0') 409 lafe_errc(1, 0, 410 "Can't specify both -%c and -%c", opt, 411 compression); 412 compression = opt; 413 compression_name = "grzip"; 414 break; 415 case 'H': /* BSD convention */ 416 bsdtar->symlink_mode = 'H'; 417 break; 418 case 'h': /* Linux Standards Base, gtar; synonym for -L */ 419 bsdtar->symlink_mode = 'L'; 420 /* Hack: -h by itself is the "help" command. */ 421 possible_help_request = 1; 422 break; 423 case OPTION_HELP: /* GNU tar, others */ 424 long_help(); 425 /* NOTREACHED*/ 426 case OPTION_HFS_COMPRESSION: /* Mac OS X v10.6 or later */ 427 bsdtar->extract_flags |= 428 ARCHIVE_EXTRACT_HFS_COMPRESSION_FORCED; 429 break; 430 case OPTION_IGNORE_ZEROS: 431 bsdtar->flags |= OPTFLAG_IGNORE_ZEROS; 432 break; 433 case 'I': /* GNU tar */ 434 /* 435 * TODO: Allow 'names' to come from an archive, 436 * not just a text file. Design a good UI for 437 * allowing names and mode/owner to be read 438 * from an archive, with contents coming from 439 * disk. This can be used to "refresh" an 440 * archive or to design archives with special 441 * permissions without having to create those 442 * permissions on disk. 443 */ 444 bsdtar->names_from_file = bsdtar->argument; 445 break; 446 case OPTION_INCLUDE: 447 /* 448 * No one else has the @archive extension, so 449 * no one else needs this to filter entries 450 * when transforming archives. 451 */ 452 if (archive_match_include_pattern(bsdtar->matching, 453 bsdtar->argument) != ARCHIVE_OK) 454 lafe_errc(1, 0, 455 "Failed to add %s to inclusion list", 456 bsdtar->argument); 457 break; 458 case 'j': /* GNU tar */ 459 if (compression != '\0') 460 lafe_errc(1, 0, 461 "Can't specify both -%c and -%c", opt, 462 compression); 463 compression = opt; 464 compression_name = "bzip2"; 465 break; 466 case 'J': /* GNU tar 1.21 and later */ 467 if (compression != '\0') 468 lafe_errc(1, 0, 469 "Can't specify both -%c and -%c", opt, 470 compression); 471 compression = opt; 472 compression_name = "xz"; 473 break; 474 case 'k': /* GNU tar */ 475 bsdtar->extract_flags |= ARCHIVE_EXTRACT_NO_OVERWRITE; 476 break; 477 case OPTION_KEEP_NEWER_FILES: /* GNU tar */ 478 bsdtar->extract_flags |= ARCHIVE_EXTRACT_NO_OVERWRITE_NEWER; 479 break; 480 case 'L': /* BSD convention */ 481 bsdtar->symlink_mode = 'L'; 482 break; 483 case 'l': /* SUSv2 and GNU tar beginning with 1.16 */ 484 /* GNU tar 1.13 used -l for --one-file-system */ 485 bsdtar->flags |= OPTFLAG_WARN_LINKS; 486 break; 487 case OPTION_LRZIP: 488 case OPTION_LZ4: 489 case OPTION_LZIP: /* GNU tar beginning with 1.23 */ 490 case OPTION_LZMA: /* GNU tar beginning with 1.20 */ 491 case OPTION_LZOP: /* GNU tar beginning with 1.21 */ 492 case OPTION_ZSTD: 493 if (compression != '\0') 494 lafe_errc(1, 0, 495 "Can't specify both -%c and -%c", opt, 496 compression); 497 compression = opt; 498 switch (opt) { 499 case OPTION_LRZIP: compression_name = "lrzip"; break; 500 case OPTION_LZ4: compression_name = "lz4"; break; 501 case OPTION_LZIP: compression_name = "lzip"; break; 502 case OPTION_LZMA: compression_name = "lzma"; break; 503 case OPTION_LZOP: compression_name = "lzop"; break; 504 case OPTION_ZSTD: compression_name = "zstd"; break; 505 } 506 break; 507 case 'm': /* SUSv2 */ 508 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_TIME; 509 break; 510 case OPTION_MAC_METADATA: /* Mac OS X */ 511 bsdtar->readdisk_flags |= ARCHIVE_READDISK_MAC_COPYFILE; 512 bsdtar->extract_flags |= ARCHIVE_EXTRACT_MAC_METADATA; 513 bsdtar->flags |= OPTFLAG_MAC_METADATA; 514 break; 515 case 'n': /* GNU tar */ 516 bsdtar->flags |= OPTFLAG_NO_SUBDIRS; 517 break; 518 /* 519 * Selecting files by time: 520 * --newer-?time='date' Only files newer than 'date' 521 * --newer-?time-than='file' Only files newer than time 522 * on specified file (useful for incremental backups) 523 */ 524 case OPTION_NEWER_CTIME: /* GNU tar */ 525 if (archive_match_include_date(bsdtar->matching, 526 ARCHIVE_MATCH_CTIME | ARCHIVE_MATCH_NEWER, 527 bsdtar->argument) != ARCHIVE_OK) 528 lafe_errc(1, 0, "Error : %s", 529 archive_error_string(bsdtar->matching)); 530 break; 531 case OPTION_NEWER_CTIME_THAN: 532 if (archive_match_include_file_time(bsdtar->matching, 533 ARCHIVE_MATCH_CTIME | ARCHIVE_MATCH_NEWER, 534 bsdtar->argument) != ARCHIVE_OK) 535 lafe_errc(1, 0, "Error : %s", 536 archive_error_string(bsdtar->matching)); 537 break; 538 case OPTION_NEWER_MTIME: /* GNU tar */ 539 if (archive_match_include_date(bsdtar->matching, 540 ARCHIVE_MATCH_MTIME | ARCHIVE_MATCH_NEWER, 541 bsdtar->argument) != ARCHIVE_OK) 542 lafe_errc(1, 0, "Error : %s", 543 archive_error_string(bsdtar->matching)); 544 break; 545 case OPTION_NEWER_MTIME_THAN: 546 if (archive_match_include_file_time(bsdtar->matching, 547 ARCHIVE_MATCH_MTIME | ARCHIVE_MATCH_NEWER, 548 bsdtar->argument) != ARCHIVE_OK) 549 lafe_errc(1, 0, "Error : %s", 550 archive_error_string(bsdtar->matching)); 551 break; 552 case OPTION_NODUMP: /* star */ 553 bsdtar->readdisk_flags |= ARCHIVE_READDISK_HONOR_NODUMP; 554 break; 555 case OPTION_NOPRESERVE_HFS_COMPRESSION: 556 /* Mac OS X v10.6 or later */ 557 bsdtar->extract_flags |= 558 ARCHIVE_EXTRACT_NO_HFS_COMPRESSION; 559 break; 560 case OPTION_NO_ACLS: /* GNU tar */ 561 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_ACL; 562 bsdtar->readdisk_flags |= ARCHIVE_READDISK_NO_ACL; 563 bsdtar->flags |= OPTFLAG_NO_ACLS; 564 break; 565 case OPTION_NO_FFLAGS: 566 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_FFLAGS; 567 bsdtar->readdisk_flags |= ARCHIVE_READDISK_NO_FFLAGS; 568 bsdtar->flags |= OPTFLAG_NO_FFLAGS; 569 break; 570 case OPTION_NO_MAC_METADATA: /* Mac OS X */ 571 bsdtar->readdisk_flags &= ~ARCHIVE_READDISK_MAC_COPYFILE; 572 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_MAC_METADATA; 573 bsdtar->flags |= OPTFLAG_NO_MAC_METADATA; 574 break; 575 case OPTION_NO_READ_SPARSE: 576 bsdtar->readdisk_flags |= ARCHIVE_READDISK_NO_SPARSE; 577 bsdtar->flags |= OPTFLAG_NO_READ_SPARSE; 578 break; 579 case OPTION_NO_SAFE_WRITES: 580 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_SAFE_WRITES; 581 break; 582 case OPTION_NO_SAME_OWNER: /* GNU tar */ 583 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_OWNER; 584 break; 585 case OPTION_NO_SAME_PERMISSIONS: /* GNU tar */ 586 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_PERM; 587 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_ACL; 588 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_XATTR; 589 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_FFLAGS; 590 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_MAC_METADATA; 591 break; 592 case OPTION_NO_XATTRS: /* GNU tar */ 593 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_XATTR; 594 bsdtar->readdisk_flags |= ARCHIVE_READDISK_NO_XATTR; 595 bsdtar->flags |= OPTFLAG_NO_XATTRS; 596 break; 597 case OPTION_NULL: /* GNU tar */ 598 bsdtar->flags |= OPTFLAG_NULL; 599 break; 600 case OPTION_NUMERIC_OWNER: /* GNU tar */ 601 bsdtar->uname = ""; 602 bsdtar->gname = ""; 603 bsdtar->flags |= OPTFLAG_NUMERIC_OWNER; 604 break; 605 case 'O': /* GNU tar */ 606 bsdtar->flags |= OPTFLAG_STDOUT; 607 break; 608 case 'o': /* SUSv2 and GNU conflict here, but not fatally */ 609 bsdtar->flags |= OPTFLAG_O; 610 break; 611 /* 612 * Selecting files by time: 613 * --older-?time='date' Only files older than 'date' 614 * --older-?time-than='file' Only files older than time 615 * on specified file 616 */ 617 case OPTION_OLDER_CTIME: 618 if (archive_match_include_date(bsdtar->matching, 619 ARCHIVE_MATCH_CTIME | ARCHIVE_MATCH_OLDER, 620 bsdtar->argument) != ARCHIVE_OK) 621 lafe_errc(1, 0, "Error : %s", 622 archive_error_string(bsdtar->matching)); 623 break; 624 case OPTION_OLDER_CTIME_THAN: 625 if (archive_match_include_file_time(bsdtar->matching, 626 ARCHIVE_MATCH_CTIME | ARCHIVE_MATCH_OLDER, 627 bsdtar->argument) != ARCHIVE_OK) 628 lafe_errc(1, 0, "Error : %s", 629 archive_error_string(bsdtar->matching)); 630 break; 631 case OPTION_OLDER_MTIME: 632 if (archive_match_include_date(bsdtar->matching, 633 ARCHIVE_MATCH_MTIME | ARCHIVE_MATCH_OLDER, 634 bsdtar->argument) != ARCHIVE_OK) 635 lafe_errc(1, 0, "Error : %s", 636 archive_error_string(bsdtar->matching)); 637 break; 638 case OPTION_OLDER_MTIME_THAN: 639 if (archive_match_include_file_time(bsdtar->matching, 640 ARCHIVE_MATCH_MTIME | ARCHIVE_MATCH_OLDER, 641 bsdtar->argument) != ARCHIVE_OK) 642 lafe_errc(1, 0, "Error : %s", 643 archive_error_string(bsdtar->matching)); 644 break; 645 case OPTION_ONE_FILE_SYSTEM: /* GNU tar */ 646 bsdtar->readdisk_flags |= 647 ARCHIVE_READDISK_NO_TRAVERSE_MOUNTS; 648 break; 649 case OPTION_OPTIONS: 650 if (bsdtar->option_options != NULL) { 651 lafe_warnc(0, 652 "Ignoring previous option '%s', separate multiple options with commas", 653 bsdtar->option_options); 654 } 655 bsdtar->option_options = bsdtar->argument; 656 break; 657 case OPTION_OWNER: /* GNU tar */ 658 tptr = NULL; 659 660 uptr = strchr(bsdtar->argument, ':'); 661 if (uptr != NULL) { 662 if (uptr[1] == 0) { 663 lafe_errc(1, 0, "Invalid argument to --owner (missing id after :)"); 664 } 665 uptr[0] = 0; 666 uptr++; 667 l = strtol(uptr, &tptr, 10); 668 if (l < 0 || l >= INT_MAX || *uptr == '\0' || 669 tptr == NULL || *tptr != '\0') { 670 lafe_errc(1, 0, "Invalid argument to --owner (%s is not a number)", uptr); 671 } else { 672 bsdtar->uid = (int)l; 673 } 674 bsdtar->uname = bsdtar->argument; 675 } else { 676 l = strtol(bsdtar->argument, &tptr, 10); 677 if (l < 0 || l >= INT_MAX || *(bsdtar->argument) == '\0' || 678 tptr == NULL || *tptr != '\0') { 679 bsdtar->uname = bsdtar->argument; 680 } else { 681 bsdtar->uid = (int)l; 682 bsdtar->uname = ""; 683 } 684 } 685 break; 686 case OPTION_MTIME: /* GNU tar */ 687 bsdtar->has_mtime = 1; 688 bsdtar->mtime = archive_parse_date(now, bsdtar->argument); 689 if (bsdtar->mtime == (time_t)-1) { 690 lafe_errc(1, 0, "Invalid argument to --mtime (bad date string)"); 691 } 692 break; 693 case OPTION_CLAMP_MTIME: /* GNU tar */ 694 bsdtar->clamp_mtime = 1; 695 break; 696 #if 0 697 /* 698 * The common BSD -P option is not necessary, since 699 * our default is to archive symlinks, not follow 700 * them. This is convenient, as -P conflicts with GNU 701 * tar anyway. 702 */ 703 case 'P': /* BSD convention */ 704 /* Default behavior, no option necessary. */ 705 break; 706 #endif 707 case 'P': /* GNU tar */ 708 bsdtar->extract_flags &= ~SECURITY; 709 bsdtar->flags |= OPTFLAG_ABSOLUTE_PATHS; 710 break; 711 case 'p': /* GNU tar, star */ 712 bsdtar->extract_flags |= ARCHIVE_EXTRACT_PERM; 713 bsdtar->extract_flags |= ARCHIVE_EXTRACT_ACL; 714 bsdtar->extract_flags |= ARCHIVE_EXTRACT_XATTR; 715 bsdtar->extract_flags |= ARCHIVE_EXTRACT_FFLAGS; 716 bsdtar->extract_flags |= ARCHIVE_EXTRACT_MAC_METADATA; 717 break; 718 case OPTION_PASSPHRASE: 719 bsdtar->passphrase = bsdtar->argument; 720 break; 721 case OPTION_POSIX: /* GNU tar */ 722 cset_set_format(bsdtar->cset, "pax"); 723 break; 724 case 'q': /* FreeBSD GNU tar --fast-read, NetBSD -q */ 725 bsdtar->flags |= OPTFLAG_FAST_READ; 726 break; 727 case 'r': /* SUSv2 */ 728 set_mode(bsdtar, opt); 729 break; 730 case OPTION_READ_SPARSE: 731 bsdtar->readdisk_flags &= ~ARCHIVE_READDISK_NO_SPARSE; 732 bsdtar->flags |= OPTFLAG_READ_SPARSE; 733 break; 734 case 'S': /* NetBSD pax-as-tar */ 735 bsdtar->extract_flags |= ARCHIVE_EXTRACT_SPARSE; 736 break; 737 case 's': /* NetBSD pax-as-tar */ 738 #if defined(HAVE_REGEX_H) || defined(HAVE_PCREPOSIX_H) || defined(HAVE_PCRE2POSIX_H) 739 add_substitution(bsdtar, bsdtar->argument); 740 #else 741 lafe_warnc(0, 742 "-s is not supported by this version of bsdtar"); 743 usage(); 744 #endif 745 break; 746 case OPTION_SAFE_WRITES: 747 bsdtar->extract_flags |= ARCHIVE_EXTRACT_SAFE_WRITES; 748 break; 749 case OPTION_SAME_OWNER: /* GNU tar */ 750 bsdtar->extract_flags |= ARCHIVE_EXTRACT_OWNER; 751 break; 752 case OPTION_STRIP_COMPONENTS: /* GNU tar 1.15 */ 753 tptr = NULL; 754 l = strtol(bsdtar->argument, &tptr, 10); 755 if (l < 0 || l > 100000L || *(bsdtar->argument) == '\0' || 756 tptr == NULL || *tptr != '\0') { 757 lafe_errc(1, 0, "Invalid argument to " 758 "--strip-components"); 759 } 760 bsdtar->strip_components = (int)l; 761 break; 762 case 'T': /* GNU tar */ 763 if (bsdtar->names_from_file) 764 lafe_errc(1, 0, "Multiple --files-from/-T options are not supported"); 765 bsdtar->names_from_file = bsdtar->argument; 766 break; 767 case 't': /* SUSv2 */ 768 set_mode(bsdtar, opt); 769 bsdtar->verbose++; 770 break; 771 case OPTION_TOTALS: /* GNU tar */ 772 bsdtar->flags |= OPTFLAG_TOTALS; 773 break; 774 case 'U': /* GNU tar */ 775 bsdtar->extract_flags |= ARCHIVE_EXTRACT_UNLINK; 776 bsdtar->flags |= OPTFLAG_UNLINK_FIRST; 777 break; 778 case 'u': /* SUSv2 */ 779 set_mode(bsdtar, opt); 780 break; 781 case OPTION_UID: /* cpio */ 782 tptr = NULL; 783 l = strtol(bsdtar->argument, &tptr, 10); 784 if (l < 0 || l >= INT_MAX || *(bsdtar->argument) == '\0' || 785 tptr == NULL || *tptr != '\0') { 786 lafe_errc(1, 0, "Invalid argument to --uid"); 787 } 788 bsdtar->uid = (int)l; 789 break; 790 case OPTION_UNAME: /* cpio */ 791 bsdtar->uname = bsdtar->argument; 792 break; 793 case OPTION_UUENCODE: 794 if (compression2 != '\0') 795 lafe_errc(1, 0, 796 "Can't specify both --uuencode and " 797 "--b64encode"); 798 compression2 = opt; 799 compression2_name = "uuencode"; 800 break; 801 case 'v': /* SUSv2 */ 802 bsdtar->verbose++; 803 break; 804 case OPTION_VERSION: /* GNU convention */ 805 version(); 806 /* NOTREACHED */ 807 #if 0 808 /* 809 * The -W longopt feature is handled inside of 810 * bsdtar_getopt(), so -W is not available here. 811 */ 812 case 'W': /* Obscure GNU convention. */ 813 break; 814 #endif 815 case 'w': /* SUSv2 */ 816 bsdtar->flags |= OPTFLAG_INTERACTIVE; 817 break; 818 case 'X': /* GNU tar */ 819 if (archive_match_exclude_pattern_from_file( 820 bsdtar->matching, bsdtar->argument, 0) 821 != ARCHIVE_OK) 822 lafe_errc(1, 0, "Error : %s", 823 archive_error_string(bsdtar->matching)); 824 break; 825 case 'x': /* SUSv2 */ 826 set_mode(bsdtar, opt); 827 break; 828 case OPTION_XATTRS: /* GNU tar */ 829 bsdtar->extract_flags |= ARCHIVE_EXTRACT_XATTR; 830 bsdtar->readdisk_flags &= ~ARCHIVE_READDISK_NO_XATTR; 831 bsdtar->flags |= OPTFLAG_XATTRS; 832 break; 833 case 'y': /* FreeBSD version of GNU tar */ 834 if (compression != '\0') 835 lafe_errc(1, 0, 836 "Can't specify both -%c and -%c", opt, 837 compression); 838 compression = opt; 839 compression_name = "bzip2"; 840 break; 841 case 'Z': /* GNU tar */ 842 if (compression != '\0') 843 lafe_errc(1, 0, 844 "Can't specify both -%c and -%c", opt, 845 compression); 846 compression = opt; 847 compression_name = "compress"; 848 break; 849 case 'z': /* GNU tar, star, many others */ 850 if (compression != '\0') 851 lafe_errc(1, 0, 852 "Can't specify both -%c and -%c", opt, 853 compression); 854 compression = opt; 855 compression_name = "gzip"; 856 break; 857 case OPTION_USE_COMPRESS_PROGRAM: 858 compress_program = bsdtar->argument; 859 break; 860 default: 861 usage(); 862 } 863 } 864 865 /* 866 * Sanity-check options. 867 */ 868 869 /* If no "real" mode was specified, treat -h as --help. */ 870 if ((bsdtar->mode == '\0') && possible_help_request) { 871 long_help(); 872 } 873 874 /* Otherwise, a mode is required. */ 875 if (bsdtar->mode == '\0') 876 lafe_errc(1, 0, 877 "Must specify one of -c, -r, -t, -u, -x"); 878 879 /* Check boolean options only permitted in certain modes. */ 880 if (bsdtar->flags & OPTFLAG_AUTO_COMPRESS) { 881 only_mode(bsdtar, "-a", "cx"); 882 if (bsdtar->mode == 'x') { 883 bsdtar->flags &= ~OPTFLAG_AUTO_COMPRESS; 884 lafe_warnc(0, 885 "Ignoring option -a in mode -x"); 886 } 887 } 888 if (bsdtar->readdisk_flags & ARCHIVE_READDISK_NO_TRAVERSE_MOUNTS) 889 only_mode(bsdtar, "--one-file-system", "cru"); 890 if (bsdtar->flags & OPTFLAG_FAST_READ) 891 only_mode(bsdtar, "--fast-read", "xt"); 892 if (bsdtar->extract_flags & ARCHIVE_EXTRACT_HFS_COMPRESSION_FORCED) 893 only_mode(bsdtar, "--hfsCompression", "x"); 894 if (bsdtar->extract_flags & ARCHIVE_EXTRACT_NO_HFS_COMPRESSION) 895 only_mode(bsdtar, "--nopreserveHFSCompression", "x"); 896 if (bsdtar->readdisk_flags & ARCHIVE_READDISK_HONOR_NODUMP) 897 only_mode(bsdtar, "--nodump", "cru"); 898 if (bsdtar->flags & OPTFLAG_ACLS) 899 only_mode(bsdtar, "--acls", "crux"); 900 if (bsdtar->flags & OPTFLAG_NO_ACLS) 901 only_mode(bsdtar, "--no-acls", "crux"); 902 if (bsdtar->flags & OPTFLAG_XATTRS) 903 only_mode(bsdtar, "--xattrs", "crux"); 904 if (bsdtar->flags & OPTFLAG_NO_XATTRS) 905 only_mode(bsdtar, "--no-xattrs", "crux"); 906 if (bsdtar->flags & OPTFLAG_FFLAGS) 907 only_mode(bsdtar, "--fflags", "crux"); 908 if (bsdtar->flags & OPTFLAG_NO_FFLAGS) 909 only_mode(bsdtar, "--no-fflags", "crux"); 910 if (bsdtar->flags & OPTFLAG_MAC_METADATA) 911 only_mode(bsdtar, "--mac-metadata", "crux"); 912 if (bsdtar->flags & OPTFLAG_NO_MAC_METADATA) 913 only_mode(bsdtar, "--no-mac-metadata", "crux"); 914 if (bsdtar->flags & OPTFLAG_O) { 915 switch (bsdtar->mode) { 916 case 'c': 917 /* 918 * In GNU tar, -o means "old format." The 919 * "ustar" format is the closest thing 920 * supported by libarchive. 921 */ 922 cset_set_format(bsdtar->cset, "ustar"); 923 /* TODO: bsdtar->create_format = "v7"; */ 924 break; 925 case 'x': 926 /* POSIX-compatible behavior. */ 927 bsdtar->flags |= OPTFLAG_NO_OWNER; 928 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_OWNER; 929 break; 930 default: 931 only_mode(bsdtar, "-o", "xc"); 932 break; 933 } 934 } 935 if (bsdtar->flags & OPTFLAG_STDOUT) 936 only_mode(bsdtar, "-O", "xt"); 937 if (bsdtar->flags & OPTFLAG_UNLINK_FIRST) 938 only_mode(bsdtar, "-U", "x"); 939 if (bsdtar->flags & OPTFLAG_WARN_LINKS) 940 only_mode(bsdtar, "--check-links", "cr"); 941 942 if ((bsdtar->flags & OPTFLAG_AUTO_COMPRESS) && 943 cset_auto_compress(bsdtar->cset, bsdtar->filename)) { 944 /* Ignore specified compressions if auto-compress works. */ 945 compression = '\0'; 946 compression2 = '\0'; 947 } 948 /* Check other parameters only permitted in certain modes. */ 949 if (compress_program != NULL) { 950 only_mode(bsdtar, "--use-compress-program", "cxt"); 951 cset_add_filter_program(bsdtar->cset, compress_program); 952 /* Ignore specified compressions. */ 953 compression = '\0'; 954 compression2 = '\0'; 955 } 956 if (compression != '\0') { 957 switch (compression) { 958 case 'J': case 'j': case 'y': case 'Z': case 'z': 959 strcpy(buff, "-?"); 960 buff[1] = (char)compression; 961 break; 962 default: 963 strcpy(buff, "--"); 964 strcat(buff, compression_name); 965 break; 966 } 967 only_mode(bsdtar, buff, "cxt"); 968 cset_add_filter(bsdtar->cset, compression_name); 969 } 970 if (compression2 != '\0') { 971 strcpy(buff, "--"); 972 strcat(buff, compression2_name); 973 only_mode(bsdtar, buff, "cxt"); 974 cset_add_filter(bsdtar->cset, compression2_name); 975 } 976 if (cset_get_format(bsdtar->cset) != NULL) 977 only_mode(bsdtar, "--format", "cru"); 978 if (bsdtar->symlink_mode != '\0') { 979 strcpy(buff, "-?"); 980 buff[1] = bsdtar->symlink_mode; 981 only_mode(bsdtar, buff, "cru"); 982 } 983 984 if (!bsdtar->has_mtime && bsdtar->clamp_mtime) 985 lafe_errc(1, 0, 986 "--clamp-mtime is not valid without --mtime <date>"); 987 988 /* 989 * When creating an archive from a directory tree, the directory 990 * walking code will already avoid entering directories when 991 * recursive inclusion of directory content is disabled, therefore 992 * changing the matching behavior has no effect for creation modes. 993 * It is relevant for extraction or listing. 994 */ 995 archive_match_set_inclusion_recursion(bsdtar->matching, 996 !(bsdtar->flags & OPTFLAG_NO_SUBDIRS)); 997 998 /* Filename "-" implies stdio. */ 999 if (strcmp(bsdtar->filename, "-") == 0) 1000 bsdtar->filename = NULL; 1001 1002 switch(bsdtar->mode) { 1003 case 'c': 1004 tar_mode_c(bsdtar); 1005 break; 1006 case 'r': 1007 tar_mode_r(bsdtar); 1008 break; 1009 case 't': 1010 tar_mode_t(bsdtar); 1011 break; 1012 case 'u': 1013 tar_mode_u(bsdtar); 1014 break; 1015 case 'x': 1016 tar_mode_x(bsdtar); 1017 break; 1018 } 1019 1020 archive_match_free(bsdtar->matching); 1021 #if defined(HAVE_REGEX_H) || defined(HAVE_PCREPOSIX_H) || defined(HAVE_PCRE2POSIX_H) 1022 cleanup_substitution(bsdtar); 1023 #endif 1024 cset_free(bsdtar->cset); 1025 passphrase_free(bsdtar->ppbuff); 1026 1027 if (bsdtar->return_value != 0) 1028 lafe_warnc(0, 1029 "Error exit delayed from previous errors."); 1030 return (bsdtar->return_value); 1031 } 1032 1033 static void 1034 set_mode(struct bsdtar *bsdtar, int opt) 1035 { 1036 if (bsdtar->mode != '\0' && bsdtar->mode != opt) 1037 lafe_errc(1, 0, 1038 "Can't specify both -%c and -%c", opt, bsdtar->mode); 1039 bsdtar->mode = opt; 1040 } 1041 1042 /* 1043 * Verify that the mode is correct. 1044 */ 1045 static void 1046 only_mode(struct bsdtar *bsdtar, const char *opt, const char *valid_modes) 1047 { 1048 if (strchr(valid_modes, bsdtar->mode) == NULL) 1049 lafe_errc(1, 0, 1050 "Option %s is not permitted in mode -%c", 1051 opt, bsdtar->mode); 1052 } 1053 1054 1055 void 1056 usage(void) 1057 { 1058 const char *p; 1059 1060 p = lafe_getprogname(); 1061 1062 fprintf(stderr, "Usage:\n"); 1063 fprintf(stderr, " List: %s -tf <archive-filename>\n", p); 1064 fprintf(stderr, " Extract: %s -xf <archive-filename>\n", p); 1065 fprintf(stderr, " Create: %s -cf <archive-filename> [filenames...]\n", p); 1066 fprintf(stderr, " Help: %s --help\n", p); 1067 exit(1); 1068 } 1069 1070 static void 1071 version(void) 1072 { 1073 printf("bsdtar %s - %s \n", 1074 BSDTAR_VERSION_STRING, 1075 archive_version_details()); 1076 exit(0); 1077 } 1078 1079 static const char *long_help_msg = 1080 "First option must be a mode specifier:\n" 1081 " -c Create -r Add/Replace -t List -u Update -x Extract\n" 1082 "Common Options:\n" 1083 " -b # Use # 512-byte records per I/O block\n" 1084 " -f <filename> Location of archive (default " _PATH_DEFTAPE ")\n" 1085 " -v Verbose\n" 1086 " -w Interactive\n" 1087 "Create: %p -c [options] [<file> | <dir> | @<archive> | -C <dir> ]\n" 1088 " <file>, <dir> add these items to archive\n" 1089 " -z, -j, -J, --lzma Compress archive with gzip/bzip2/xz/lzma\n" 1090 " --format {ustar|pax|cpio|shar} Select archive format\n" 1091 " --exclude <pattern> Skip files that match pattern\n" 1092 " --mtime <date> Set modification times for added files\n" 1093 " --clamp-mtime Only set modification times for files newer than --mtime\n" 1094 " -C <dir> Change to <dir> before processing remaining files\n" 1095 " @<archive> Add entries from <archive> to output\n" 1096 "List: %p -t [options] [<patterns>]\n" 1097 " <patterns> If specified, list only entries that match\n" 1098 "Extract: %p -x [options] [<patterns>]\n" 1099 " <patterns> If specified, extract only entries that match\n" 1100 " -k Keep (don't overwrite) existing files\n" 1101 " -m Don't restore modification times\n" 1102 " -O Write entries to stdout, don't restore to disk\n" 1103 " -p Restore permissions (including ACLs, owner, file flags)\n"; 1104 1105 1106 /* 1107 * Note that the word 'bsdtar' will always appear in the first line 1108 * of output. 1109 * 1110 * In particular, /bin/sh scripts that need to test for the presence 1111 * of bsdtar can use the following template: 1112 * 1113 * if (tar --help 2>&1 | grep bsdtar >/dev/null 2>&1 ) then \ 1114 * echo bsdtar; else echo not bsdtar; fi 1115 */ 1116 static void 1117 long_help(void) 1118 { 1119 const char *prog; 1120 const char *p; 1121 1122 prog = lafe_getprogname(); 1123 1124 fflush(stderr); 1125 1126 p = (strcmp(prog,"bsdtar") != 0) ? "(bsdtar)" : ""; 1127 printf("%s%s: manipulate archive files\n", prog, p); 1128 1129 for (p = long_help_msg; *p != '\0'; p++) { 1130 if (*p == '%') { 1131 if (p[1] == 'p') { 1132 fputs(prog, stdout); 1133 p++; 1134 } else 1135 putchar('%'); 1136 } else 1137 putchar(*p); 1138 } 1139 version(); 1140 } 1141
Indexes created Thu Apr 30 00:23:01 UTC 2026