bsdtar.c revision 342361
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: stable/10/contrib/libarchive/tar/bsdtar.c 342361 2018-12-21 23:33:28Z mm $"); 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__ 93int _CRT_glob = 0; /* Disable broken CRT globbing. */ 94#endif 95 96#if defined(HAVE_SIGACTION) && (defined(SIGINFO) || defined(SIGUSR1)) 97static volatile int siginfo_occurred; 98 99static void 100siginfo_handler(int sig) 101{ 102 (void)sig; /* UNUSED */ 103 siginfo_occurred = 1; 104} 105 106int 107need_report(void) 108{ 109 int r = siginfo_occurred; 110 siginfo_occurred = 0; 111 return (r); 112} 113#else 114int 115need_report(void) 116{ 117 return (0); 118} 119#endif 120 121static void long_help(void) __LA_DEAD; 122static void only_mode(struct bsdtar *, const char *opt, 123 const char *valid); 124static void set_mode(struct bsdtar *, char opt); 125static 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 132int 133main(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 *tptr; 141 char possible_help_request; 142 char buff[16]; 143 144 /* 145 * Use a pointer for consistency, but stack-allocated storage 146 * for ease of cleanup. 147 */ 148 bsdtar = &bsdtar_storage; 149 memset(bsdtar, 0, sizeof(*bsdtar)); 150 bsdtar->fd = -1; /* Mark as "unused" */ 151 bsdtar->gid = -1; 152 bsdtar->uid = -1; 153 bsdtar->flags = 0; 154 compression = compression2 = '\0'; 155 compression_name = compression2_name = NULL; 156 compress_program = NULL; 157 158#if defined(HAVE_SIGACTION) 159 { /* Set up signal handling. */ 160 struct sigaction sa; 161 sa.sa_handler = siginfo_handler; 162 sigemptyset(&sa.sa_mask); 163 sa.sa_flags = 0; 164#ifdef SIGINFO 165 if (sigaction(SIGINFO, &sa, NULL)) 166 lafe_errc(1, errno, "sigaction(SIGINFO) failed"); 167#endif 168#ifdef SIGUSR1 169 /* ... and treat SIGUSR1 the same way as SIGINFO. */ 170 if (sigaction(SIGUSR1, &sa, NULL)) 171 lafe_errc(1, errno, "sigaction(SIGUSR1) failed"); 172#endif 173#ifdef SIGPIPE 174 /* Ignore SIGPIPE signals. */ 175 sa.sa_handler = SIG_IGN; 176 sigaction(SIGPIPE, &sa, NULL); 177#endif 178 } 179#endif 180 181 /* Set lafe_progname before calling lafe_warnc. */ 182 lafe_setprogname(*argv, "bsdtar"); 183 184#if HAVE_SETLOCALE 185 if (setlocale(LC_ALL, "") == NULL) 186 lafe_warnc(0, "Failed to set default locale"); 187#endif 188#if defined(HAVE_NL_LANGINFO) && defined(HAVE_D_MD_ORDER) 189 bsdtar->day_first = (*nl_langinfo(D_MD_ORDER) == 'd'); 190#endif 191 possible_help_request = 0; 192 193 /* Look up uid of current user for future reference */ 194 bsdtar->user_uid = geteuid(); 195 196 /* Default: open tape drive. */ 197 bsdtar->filename = getenv("TAPE"); 198 if (bsdtar->filename == NULL) 199 bsdtar->filename = _PATH_DEFTAPE; 200 201 /* Default block size settings. */ 202 bsdtar->bytes_per_block = DEFAULT_BYTES_PER_BLOCK; 203 /* Allow library to default this unless user specifies -b. */ 204 bsdtar->bytes_in_last_block = -1; 205 206 /* Default: preserve mod time on extract */ 207 bsdtar->extract_flags = ARCHIVE_EXTRACT_TIME; 208 209 /* Default: Perform basic security checks. */ 210 bsdtar->extract_flags |= SECURITY; 211 212#ifndef _WIN32 213 /* On POSIX systems, assume --same-owner and -p when run by 214 * the root user. This doesn't make any sense on Windows. */ 215 if (bsdtar->user_uid == 0) { 216 /* --same-owner */ 217 bsdtar->extract_flags |= ARCHIVE_EXTRACT_OWNER; 218 /* -p */ 219 bsdtar->extract_flags |= ARCHIVE_EXTRACT_PERM; 220 bsdtar->extract_flags |= ARCHIVE_EXTRACT_ACL; 221 bsdtar->extract_flags |= ARCHIVE_EXTRACT_XATTR; 222 bsdtar->extract_flags |= ARCHIVE_EXTRACT_FFLAGS; 223 bsdtar->extract_flags |= ARCHIVE_EXTRACT_MAC_METADATA; 224 } 225#endif 226 227 /* 228 * Enable Mac OS "copyfile()" extension by default. 229 * This has no effect on other platforms. 230 */ 231 bsdtar->readdisk_flags |= ARCHIVE_READDISK_MAC_COPYFILE; 232#ifdef COPYFILE_DISABLE_VAR 233 if (getenv(COPYFILE_DISABLE_VAR)) 234 bsdtar->readdisk_flags &= ~ARCHIVE_READDISK_MAC_COPYFILE; 235#endif 236#if defined(__APPLE__) 237 /* 238 * On Mac OS ACLs are archived with copyfile() (--mac-metadata) 239 * Translation to NFSv4 ACLs has to be requested explicitly with --acls 240 */ 241 bsdtar->readdisk_flags |= ARCHIVE_READDISK_NO_ACL; 242#endif 243 244 bsdtar->matching = archive_match_new(); 245 if (bsdtar->matching == NULL) 246 lafe_errc(1, errno, "Out of memory"); 247 bsdtar->cset = cset_new(); 248 if (bsdtar->cset == NULL) 249 lafe_errc(1, errno, "Out of memory"); 250 251 bsdtar->argv = argv; 252 bsdtar->argc = argc; 253 254 /* 255 * Comments following each option indicate where that option 256 * originated: SUSv2, POSIX, GNU tar, star, etc. If there's 257 * no such comment, then I don't know of anyone else who 258 * implements that option. 259 */ 260 while ((opt = bsdtar_getopt(bsdtar)) != -1) { 261 switch (opt) { 262 case 'a': /* GNU tar */ 263 bsdtar->flags |= OPTFLAG_AUTO_COMPRESS; 264 break; 265 case OPTION_ACLS: /* GNU tar */ 266 bsdtar->extract_flags |= ARCHIVE_EXTRACT_ACL; 267 bsdtar->readdisk_flags &= ~ARCHIVE_READDISK_NO_ACL; 268 bsdtar->flags |= OPTFLAG_ACLS; 269 break; 270 case 'B': /* GNU tar */ 271 /* libarchive doesn't need this; just ignore it. */ 272 break; 273 case 'b': /* SUSv2 */ 274 errno = 0; 275 tptr = NULL; 276 t = (int)strtol(bsdtar->argument, &tptr, 10); 277 if (errno || t <= 0 || t > 8192 || 278 *(bsdtar->argument) == '\0' || tptr == NULL || 279 *tptr != '\0') { 280 lafe_errc(1, 0, "Invalid or out of range " 281 "(1..8192) argument to -b"); 282 } 283 bsdtar->bytes_per_block = 512 * t; 284 /* Explicit -b forces last block size. */ 285 bsdtar->bytes_in_last_block = bsdtar->bytes_per_block; 286 break; 287 case OPTION_B64ENCODE: 288 if (compression2 != '\0') 289 lafe_errc(1, 0, 290 "Can't specify both --uuencode and " 291 "--b64encode"); 292 compression2 = opt; 293 compression2_name = "b64encode"; 294 break; 295 case 'C': /* GNU tar */ 296 if (strlen(bsdtar->argument) == 0) 297 lafe_errc(1, 0, 298 "Meaningless option: -C ''"); 299 300 set_chdir(bsdtar, bsdtar->argument); 301 break; 302 case 'c': /* SUSv2 */ 303 set_mode(bsdtar, opt); 304 break; 305 case OPTION_CHECK_LINKS: /* GNU tar */ 306 bsdtar->flags |= OPTFLAG_WARN_LINKS; 307 break; 308 case OPTION_CHROOT: /* NetBSD */ 309 bsdtar->flags |= OPTFLAG_CHROOT; 310 break; 311 case OPTION_CLEAR_NOCHANGE_FFLAGS: 312 bsdtar->extract_flags |= 313 ARCHIVE_EXTRACT_CLEAR_NOCHANGE_FFLAGS; 314 break; 315 case OPTION_EXCLUDE: /* GNU tar */ 316 if (archive_match_exclude_pattern( 317 bsdtar->matching, bsdtar->argument) != ARCHIVE_OK) 318 lafe_errc(1, 0, 319 "Couldn't exclude %s\n", bsdtar->argument); 320 break; 321 case OPTION_FFLAGS: 322 bsdtar->extract_flags |= ARCHIVE_EXTRACT_FFLAGS; 323 bsdtar->readdisk_flags &= ~ARCHIVE_READDISK_NO_FFLAGS; 324 bsdtar->flags |= OPTFLAG_FFLAGS; 325 break; 326 case OPTION_FORMAT: /* GNU tar, others */ 327 cset_set_format(bsdtar->cset, bsdtar->argument); 328 break; 329 case 'f': /* SUSv2 */ 330 bsdtar->filename = bsdtar->argument; 331 break; 332 case OPTION_GID: /* cpio */ 333 errno = 0; 334 tptr = NULL; 335 t = (int)strtol(bsdtar->argument, &tptr, 10); 336 if (errno || t < 0 || *(bsdtar->argument) == '\0' || 337 tptr == NULL || *tptr != '\0') { 338 lafe_errc(1, 0, "Invalid argument to --gid"); 339 } 340 bsdtar->gid = t; 341 break; 342 case OPTION_GNAME: /* cpio */ 343 bsdtar->gname = bsdtar->argument; 344 break; 345 case OPTION_GRZIP: 346 if (compression != '\0') 347 lafe_errc(1, 0, 348 "Can't specify both -%c and -%c", opt, 349 compression); 350 compression = opt; 351 compression_name = "grzip"; 352 break; 353 case 'H': /* BSD convention */ 354 bsdtar->symlink_mode = 'H'; 355 break; 356 case 'h': /* Linux Standards Base, gtar; synonym for -L */ 357 bsdtar->symlink_mode = 'L'; 358 /* Hack: -h by itself is the "help" command. */ 359 possible_help_request = 1; 360 break; 361 case OPTION_HELP: /* GNU tar, others */ 362 long_help(); 363 exit(0); 364 break; 365 case OPTION_HFS_COMPRESSION: /* Mac OS X v10.6 or later */ 366 bsdtar->extract_flags |= 367 ARCHIVE_EXTRACT_HFS_COMPRESSION_FORCED; 368 break; 369 case OPTION_IGNORE_ZEROS: 370 bsdtar->flags |= OPTFLAG_IGNORE_ZEROS; 371 break; 372 case 'I': /* GNU tar */ 373 /* 374 * TODO: Allow 'names' to come from an archive, 375 * not just a text file. Design a good UI for 376 * allowing names and mode/owner to be read 377 * from an archive, with contents coming from 378 * disk. This can be used to "refresh" an 379 * archive or to design archives with special 380 * permissions without having to create those 381 * permissions on disk. 382 */ 383 bsdtar->names_from_file = bsdtar->argument; 384 break; 385 case OPTION_INCLUDE: 386 /* 387 * No one else has the @archive extension, so 388 * no one else needs this to filter entries 389 * when transforming archives. 390 */ 391 if (archive_match_include_pattern(bsdtar->matching, 392 bsdtar->argument) != ARCHIVE_OK) 393 lafe_errc(1, 0, 394 "Failed to add %s to inclusion list", 395 bsdtar->argument); 396 break; 397 case 'j': /* GNU tar */ 398 if (compression != '\0') 399 lafe_errc(1, 0, 400 "Can't specify both -%c and -%c", opt, 401 compression); 402 compression = opt; 403 compression_name = "bzip2"; 404 break; 405 case 'J': /* GNU tar 1.21 and later */ 406 if (compression != '\0') 407 lafe_errc(1, 0, 408 "Can't specify both -%c and -%c", opt, 409 compression); 410 compression = opt; 411 compression_name = "xz"; 412 break; 413 case 'k': /* GNU tar */ 414 bsdtar->extract_flags |= ARCHIVE_EXTRACT_NO_OVERWRITE; 415 break; 416 case OPTION_KEEP_NEWER_FILES: /* GNU tar */ 417 bsdtar->extract_flags |= ARCHIVE_EXTRACT_NO_OVERWRITE_NEWER; 418 break; 419 case 'L': /* BSD convention */ 420 bsdtar->symlink_mode = 'L'; 421 break; 422 case 'l': /* SUSv2 and GNU tar beginning with 1.16 */ 423 /* GNU tar 1.13 used -l for --one-file-system */ 424 bsdtar->flags |= OPTFLAG_WARN_LINKS; 425 break; 426 case OPTION_LRZIP: 427 case OPTION_LZ4: 428 case OPTION_LZIP: /* GNU tar beginning with 1.23 */ 429 case OPTION_LZMA: /* GNU tar beginning with 1.20 */ 430 case OPTION_LZOP: /* GNU tar beginning with 1.21 */ 431 case OPTION_ZSTD: 432 if (compression != '\0') 433 lafe_errc(1, 0, 434 "Can't specify both -%c and -%c", opt, 435 compression); 436 compression = opt; 437 switch (opt) { 438 case OPTION_LRZIP: compression_name = "lrzip"; break; 439 case OPTION_LZ4: compression_name = "lz4"; break; 440 case OPTION_LZIP: compression_name = "lzip"; break; 441 case OPTION_LZMA: compression_name = "lzma"; break; 442 case OPTION_LZOP: compression_name = "lzop"; break; 443 case OPTION_ZSTD: compression_name = "zstd"; break; 444 } 445 break; 446 case 'm': /* SUSv2 */ 447 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_TIME; 448 break; 449 case OPTION_MAC_METADATA: /* Mac OS X */ 450 bsdtar->readdisk_flags |= ARCHIVE_READDISK_MAC_COPYFILE; 451 bsdtar->extract_flags |= ARCHIVE_EXTRACT_MAC_METADATA; 452 bsdtar->flags |= OPTFLAG_MAC_METADATA; 453 break; 454 case 'n': /* GNU tar */ 455 bsdtar->flags |= OPTFLAG_NO_SUBDIRS; 456 break; 457 /* 458 * Selecting files by time: 459 * --newer-?time='date' Only files newer than 'date' 460 * --newer-?time-than='file' Only files newer than time 461 * on specified file (useful for incremental backups) 462 */ 463 case OPTION_NEWER_CTIME: /* GNU tar */ 464 if (archive_match_include_date(bsdtar->matching, 465 ARCHIVE_MATCH_CTIME | ARCHIVE_MATCH_NEWER, 466 bsdtar->argument) != ARCHIVE_OK) 467 lafe_errc(1, 0, "Error : %s", 468 archive_error_string(bsdtar->matching)); 469 break; 470 case OPTION_NEWER_CTIME_THAN: 471 if (archive_match_include_file_time(bsdtar->matching, 472 ARCHIVE_MATCH_CTIME | ARCHIVE_MATCH_NEWER, 473 bsdtar->argument) != ARCHIVE_OK) 474 lafe_errc(1, 0, "Error : %s", 475 archive_error_string(bsdtar->matching)); 476 break; 477 case OPTION_NEWER_MTIME: /* GNU tar */ 478 if (archive_match_include_date(bsdtar->matching, 479 ARCHIVE_MATCH_MTIME | ARCHIVE_MATCH_NEWER, 480 bsdtar->argument) != ARCHIVE_OK) 481 lafe_errc(1, 0, "Error : %s", 482 archive_error_string(bsdtar->matching)); 483 break; 484 case OPTION_NEWER_MTIME_THAN: 485 if (archive_match_include_file_time(bsdtar->matching, 486 ARCHIVE_MATCH_MTIME | ARCHIVE_MATCH_NEWER, 487 bsdtar->argument) != ARCHIVE_OK) 488 lafe_errc(1, 0, "Error : %s", 489 archive_error_string(bsdtar->matching)); 490 break; 491 case OPTION_NODUMP: /* star */ 492 bsdtar->readdisk_flags |= ARCHIVE_READDISK_HONOR_NODUMP; 493 break; 494 case OPTION_NOPRESERVE_HFS_COMPRESSION: 495 /* Mac OS X v10.6 or later */ 496 bsdtar->extract_flags |= 497 ARCHIVE_EXTRACT_NO_HFS_COMPRESSION; 498 break; 499 case OPTION_NO_ACLS: /* GNU tar */ 500 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_ACL; 501 bsdtar->readdisk_flags |= ARCHIVE_READDISK_NO_ACL; 502 bsdtar->flags |= OPTFLAG_NO_ACLS; 503 break; 504 case OPTION_NO_FFLAGS: 505 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_FFLAGS; 506 bsdtar->readdisk_flags |= ARCHIVE_READDISK_NO_FFLAGS; 507 bsdtar->flags |= OPTFLAG_NO_FFLAGS; 508 break; 509 case OPTION_NO_MAC_METADATA: /* Mac OS X */ 510 bsdtar->readdisk_flags &= ~ARCHIVE_READDISK_MAC_COPYFILE; 511 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_MAC_METADATA; 512 bsdtar->flags |= OPTFLAG_NO_MAC_METADATA; 513 break; 514 case OPTION_NO_SAME_OWNER: /* GNU tar */ 515 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_OWNER; 516 break; 517 case OPTION_NO_SAME_PERMISSIONS: /* GNU tar */ 518 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_PERM; 519 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_ACL; 520 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_XATTR; 521 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_FFLAGS; 522 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_MAC_METADATA; 523 break; 524 case OPTION_NO_XATTRS: /* GNU tar */ 525 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_XATTR; 526 bsdtar->readdisk_flags |= ARCHIVE_READDISK_NO_XATTR; 527 bsdtar->flags |= OPTFLAG_NO_XATTRS; 528 break; 529 case OPTION_NULL: /* GNU tar */ 530 bsdtar->flags |= OPTFLAG_NULL; 531 break; 532 case OPTION_NUMERIC_OWNER: /* GNU tar */ 533 bsdtar->uname = ""; 534 bsdtar->gname = ""; 535 bsdtar->flags |= OPTFLAG_NUMERIC_OWNER; 536 break; 537 case 'O': /* GNU tar */ 538 bsdtar->flags |= OPTFLAG_STDOUT; 539 break; 540 case 'o': /* SUSv2 and GNU conflict here, but not fatally */ 541 bsdtar->flags |= OPTFLAG_O; 542 break; 543 /* 544 * Selecting files by time: 545 * --older-?time='date' Only files older than 'date' 546 * --older-?time-than='file' Only files older than time 547 * on specified file 548 */ 549 case OPTION_OLDER_CTIME: 550 if (archive_match_include_date(bsdtar->matching, 551 ARCHIVE_MATCH_CTIME | ARCHIVE_MATCH_OLDER, 552 bsdtar->argument) != ARCHIVE_OK) 553 lafe_errc(1, 0, "Error : %s", 554 archive_error_string(bsdtar->matching)); 555 break; 556 case OPTION_OLDER_CTIME_THAN: 557 if (archive_match_include_file_time(bsdtar->matching, 558 ARCHIVE_MATCH_CTIME | ARCHIVE_MATCH_OLDER, 559 bsdtar->argument) != ARCHIVE_OK) 560 lafe_errc(1, 0, "Error : %s", 561 archive_error_string(bsdtar->matching)); 562 break; 563 case OPTION_OLDER_MTIME: 564 if (archive_match_include_date(bsdtar->matching, 565 ARCHIVE_MATCH_MTIME | ARCHIVE_MATCH_OLDER, 566 bsdtar->argument) != ARCHIVE_OK) 567 lafe_errc(1, 0, "Error : %s", 568 archive_error_string(bsdtar->matching)); 569 break; 570 case OPTION_OLDER_MTIME_THAN: 571 if (archive_match_include_file_time(bsdtar->matching, 572 ARCHIVE_MATCH_MTIME | ARCHIVE_MATCH_OLDER, 573 bsdtar->argument) != ARCHIVE_OK) 574 lafe_errc(1, 0, "Error : %s", 575 archive_error_string(bsdtar->matching)); 576 break; 577 case OPTION_ONE_FILE_SYSTEM: /* GNU tar */ 578 bsdtar->readdisk_flags |= 579 ARCHIVE_READDISK_NO_TRAVERSE_MOUNTS; 580 break; 581 case OPTION_OPTIONS: 582 bsdtar->option_options = bsdtar->argument; 583 break; 584#if 0 585 /* 586 * The common BSD -P option is not necessary, since 587 * our default is to archive symlinks, not follow 588 * them. This is convenient, as -P conflicts with GNU 589 * tar anyway. 590 */ 591 case 'P': /* BSD convention */ 592 /* Default behavior, no option necessary. */ 593 break; 594#endif 595 case 'P': /* GNU tar */ 596 bsdtar->extract_flags &= ~SECURITY; 597 bsdtar->flags |= OPTFLAG_ABSOLUTE_PATHS; 598 break; 599 case 'p': /* GNU tar, star */ 600 bsdtar->extract_flags |= ARCHIVE_EXTRACT_PERM; 601 bsdtar->extract_flags |= ARCHIVE_EXTRACT_ACL; 602 bsdtar->extract_flags |= ARCHIVE_EXTRACT_XATTR; 603 bsdtar->extract_flags |= ARCHIVE_EXTRACT_FFLAGS; 604 bsdtar->extract_flags |= ARCHIVE_EXTRACT_MAC_METADATA; 605 break; 606 case OPTION_PASSPHRASE: 607 bsdtar->passphrase = bsdtar->argument; 608 break; 609 case OPTION_POSIX: /* GNU tar */ 610 cset_set_format(bsdtar->cset, "pax"); 611 break; 612 case 'q': /* FreeBSD GNU tar --fast-read, NetBSD -q */ 613 bsdtar->flags |= OPTFLAG_FAST_READ; 614 break; 615 case 'r': /* SUSv2 */ 616 set_mode(bsdtar, opt); 617 break; 618 case 'S': /* NetBSD pax-as-tar */ 619 bsdtar->extract_flags |= ARCHIVE_EXTRACT_SPARSE; 620 break; 621 case 's': /* NetBSD pax-as-tar */ 622#if defined(HAVE_REGEX_H) || defined(HAVE_PCREPOSIX_H) 623 add_substitution(bsdtar, bsdtar->argument); 624#else 625 lafe_warnc(0, 626 "-s is not supported by this version of bsdtar"); 627 usage(); 628#endif 629 break; 630 case OPTION_SAME_OWNER: /* GNU tar */ 631 bsdtar->extract_flags |= ARCHIVE_EXTRACT_OWNER; 632 break; 633 case OPTION_STRIP_COMPONENTS: /* GNU tar 1.15 */ 634 errno = 0; 635 tptr = NULL; 636 t = (int)strtol(bsdtar->argument, &tptr, 10); 637 if (errno || t < 0 || *(bsdtar->argument) == '\0' || 638 tptr == NULL || *tptr != '\0') { 639 lafe_errc(1, 0, "Invalid argument to " 640 "--strip-components"); 641 } 642 bsdtar->strip_components = t; 643 break; 644 case 'T': /* GNU tar */ 645 bsdtar->names_from_file = bsdtar->argument; 646 break; 647 case 't': /* SUSv2 */ 648 set_mode(bsdtar, opt); 649 bsdtar->verbose++; 650 break; 651 case OPTION_TOTALS: /* GNU tar */ 652 bsdtar->flags |= OPTFLAG_TOTALS; 653 break; 654 case 'U': /* GNU tar */ 655 bsdtar->extract_flags |= ARCHIVE_EXTRACT_UNLINK; 656 bsdtar->flags |= OPTFLAG_UNLINK_FIRST; 657 break; 658 case 'u': /* SUSv2 */ 659 set_mode(bsdtar, opt); 660 break; 661 case OPTION_UID: /* cpio */ 662 errno = 0; 663 tptr = NULL; 664 t = (int)strtol(bsdtar->argument, &tptr, 10); 665 if (errno || t < 0 || *(bsdtar->argument) == '\0' || 666 tptr == NULL || *tptr != '\0') { 667 lafe_errc(1, 0, "Invalid argument to --uid"); 668 } 669 bsdtar->uid = t; 670 break; 671 case OPTION_UNAME: /* cpio */ 672 bsdtar->uname = bsdtar->argument; 673 break; 674 case OPTION_UUENCODE: 675 if (compression2 != '\0') 676 lafe_errc(1, 0, 677 "Can't specify both --uuencode and " 678 "--b64encode"); 679 compression2 = opt; 680 compression2_name = "uuencode"; 681 break; 682 case 'v': /* SUSv2 */ 683 bsdtar->verbose++; 684 break; 685 case OPTION_VERSION: /* GNU convention */ 686 version(); 687 break; 688#if 0 689 /* 690 * The -W longopt feature is handled inside of 691 * bsdtar_getopt(), so -W is not available here. 692 */ 693 case 'W': /* Obscure GNU convention. */ 694 break; 695#endif 696 case 'w': /* SUSv2 */ 697 bsdtar->flags |= OPTFLAG_INTERACTIVE; 698 break; 699 case 'X': /* GNU tar */ 700 if (archive_match_exclude_pattern_from_file( 701 bsdtar->matching, bsdtar->argument, 0) 702 != ARCHIVE_OK) 703 lafe_errc(1, 0, "Error : %s", 704 archive_error_string(bsdtar->matching)); 705 break; 706 case 'x': /* SUSv2 */ 707 set_mode(bsdtar, opt); 708 break; 709 case OPTION_XATTRS: /* GNU tar */ 710 bsdtar->extract_flags |= ARCHIVE_EXTRACT_XATTR; 711 bsdtar->readdisk_flags &= ~ARCHIVE_READDISK_NO_XATTR; 712 bsdtar->flags |= OPTFLAG_XATTRS; 713 break; 714 case 'y': /* FreeBSD version of GNU tar */ 715 if (compression != '\0') 716 lafe_errc(1, 0, 717 "Can't specify both -%c and -%c", opt, 718 compression); 719 compression = opt; 720 compression_name = "bzip2"; 721 break; 722 case 'Z': /* GNU tar */ 723 if (compression != '\0') 724 lafe_errc(1, 0, 725 "Can't specify both -%c and -%c", opt, 726 compression); 727 compression = opt; 728 compression_name = "compress"; 729 break; 730 case 'z': /* GNU tar, star, many others */ 731 if (compression != '\0') 732 lafe_errc(1, 0, 733 "Can't specify both -%c and -%c", opt, 734 compression); 735 compression = opt; 736 compression_name = "gzip"; 737 break; 738 case OPTION_USE_COMPRESS_PROGRAM: 739 compress_program = bsdtar->argument; 740 break; 741 default: 742 usage(); 743 } 744 } 745 746 /* 747 * Sanity-check options. 748 */ 749 750 /* If no "real" mode was specified, treat -h as --help. */ 751 if ((bsdtar->mode == '\0') && possible_help_request) { 752 long_help(); 753 exit(0); 754 } 755 756 /* Otherwise, a mode is required. */ 757 if (bsdtar->mode == '\0') 758 lafe_errc(1, 0, 759 "Must specify one of -c, -r, -t, -u, -x"); 760 761 /* Check boolean options only permitted in certain modes. */ 762 if (bsdtar->flags & OPTFLAG_AUTO_COMPRESS) 763 only_mode(bsdtar, "-a", "c"); 764 if (bsdtar->readdisk_flags & ARCHIVE_READDISK_NO_TRAVERSE_MOUNTS) 765 only_mode(bsdtar, "--one-file-system", "cru"); 766 if (bsdtar->flags & OPTFLAG_FAST_READ) 767 only_mode(bsdtar, "--fast-read", "xt"); 768 if (bsdtar->extract_flags & ARCHIVE_EXTRACT_HFS_COMPRESSION_FORCED) 769 only_mode(bsdtar, "--hfsCompression", "x"); 770 if (bsdtar->extract_flags & ARCHIVE_EXTRACT_NO_HFS_COMPRESSION) 771 only_mode(bsdtar, "--nopreserveHFSCompression", "x"); 772 if (bsdtar->readdisk_flags & ARCHIVE_READDISK_HONOR_NODUMP) 773 only_mode(bsdtar, "--nodump", "cru"); 774 if (bsdtar->flags & OPTFLAG_ACLS) 775 only_mode(bsdtar, "--acls", "crux"); 776 if (bsdtar->flags & OPTFLAG_NO_ACLS) 777 only_mode(bsdtar, "--no-acls", "crux"); 778 if (bsdtar->flags & OPTFLAG_XATTRS) 779 only_mode(bsdtar, "--xattrs", "crux"); 780 if (bsdtar->flags & OPTFLAG_NO_XATTRS) 781 only_mode(bsdtar, "--no-xattrs", "crux"); 782 if (bsdtar->flags & OPTFLAG_FFLAGS) 783 only_mode(bsdtar, "--fflags", "crux"); 784 if (bsdtar->flags & OPTFLAG_NO_FFLAGS) 785 only_mode(bsdtar, "--no-fflags", "crux"); 786 if (bsdtar->flags & OPTFLAG_MAC_METADATA) 787 only_mode(bsdtar, "--mac-metadata", "crux"); 788 if (bsdtar->flags & OPTFLAG_NO_MAC_METADATA) 789 only_mode(bsdtar, "--no-mac-metadata", "crux"); 790 if (bsdtar->flags & OPTFLAG_O) { 791 switch (bsdtar->mode) { 792 case 'c': 793 /* 794 * In GNU tar, -o means "old format." The 795 * "ustar" format is the closest thing 796 * supported by libarchive. 797 */ 798 cset_set_format(bsdtar->cset, "ustar"); 799 /* TODO: bsdtar->create_format = "v7"; */ 800 break; 801 case 'x': 802 /* POSIX-compatible behavior. */ 803 bsdtar->flags |= OPTFLAG_NO_OWNER; 804 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_OWNER; 805 break; 806 default: 807 only_mode(bsdtar, "-o", "xc"); 808 break; 809 } 810 } 811 if (bsdtar->flags & OPTFLAG_NO_SUBDIRS) 812 only_mode(bsdtar, "-n", "cru"); 813 if (bsdtar->flags & OPTFLAG_STDOUT) 814 only_mode(bsdtar, "-O", "xt"); 815 if (bsdtar->flags & OPTFLAG_UNLINK_FIRST) 816 only_mode(bsdtar, "-U", "x"); 817 if (bsdtar->flags & OPTFLAG_WARN_LINKS) 818 only_mode(bsdtar, "--check-links", "cr"); 819 820 if ((bsdtar->flags & OPTFLAG_AUTO_COMPRESS) && 821 cset_auto_compress(bsdtar->cset, bsdtar->filename)) { 822 /* Ignore specified compressions if auto-compress works. */ 823 compression = '\0'; 824 compression2 = '\0'; 825 } 826 /* Check other parameters only permitted in certain modes. */ 827 if (compress_program != NULL) { 828 only_mode(bsdtar, "--use-compress-program", "cxt"); 829 cset_add_filter_program(bsdtar->cset, compress_program); 830 /* Ignore specified compressions. */ 831 compression = '\0'; 832 compression2 = '\0'; 833 } 834 if (compression != '\0') { 835 switch (compression) { 836 case 'J': case 'j': case 'y': case 'Z': case 'z': 837 strcpy(buff, "-?"); 838 buff[1] = compression; 839 break; 840 default: 841 strcpy(buff, "--"); 842 strcat(buff, compression_name); 843 break; 844 } 845 only_mode(bsdtar, buff, "cxt"); 846 cset_add_filter(bsdtar->cset, compression_name); 847 } 848 if (compression2 != '\0') { 849 strcpy(buff, "--"); 850 strcat(buff, compression2_name); 851 only_mode(bsdtar, buff, "cxt"); 852 cset_add_filter(bsdtar->cset, compression2_name); 853 } 854 if (cset_get_format(bsdtar->cset) != NULL) 855 only_mode(bsdtar, "--format", "cru"); 856 if (bsdtar->symlink_mode != '\0') { 857 strcpy(buff, "-?"); 858 buff[1] = bsdtar->symlink_mode; 859 only_mode(bsdtar, buff, "cru"); 860 } 861 862 /* Filename "-" implies stdio. */ 863 if (strcmp(bsdtar->filename, "-") == 0) 864 bsdtar->filename = NULL; 865 866 switch(bsdtar->mode) { 867 case 'c': 868 tar_mode_c(bsdtar); 869 break; 870 case 'r': 871 tar_mode_r(bsdtar); 872 break; 873 case 't': 874 tar_mode_t(bsdtar); 875 break; 876 case 'u': 877 tar_mode_u(bsdtar); 878 break; 879 case 'x': 880 tar_mode_x(bsdtar); 881 break; 882 } 883 884 archive_match_free(bsdtar->matching); 885#if defined(HAVE_REGEX_H) || defined(HAVE_PCREPOSIX_H) 886 cleanup_substitution(bsdtar); 887#endif 888 cset_free(bsdtar->cset); 889 passphrase_free(bsdtar->ppbuff); 890 891 if (bsdtar->return_value != 0) 892 lafe_warnc(0, 893 "Error exit delayed from previous errors."); 894 return (bsdtar->return_value); 895} 896 897static void 898set_mode(struct bsdtar *bsdtar, char opt) 899{ 900 if (bsdtar->mode != '\0' && bsdtar->mode != opt) 901 lafe_errc(1, 0, 902 "Can't specify both -%c and -%c", opt, bsdtar->mode); 903 bsdtar->mode = opt; 904} 905 906/* 907 * Verify that the mode is correct. 908 */ 909static void 910only_mode(struct bsdtar *bsdtar, const char *opt, const char *valid_modes) 911{ 912 if (strchr(valid_modes, bsdtar->mode) == NULL) 913 lafe_errc(1, 0, 914 "Option %s is not permitted in mode -%c", 915 opt, bsdtar->mode); 916} 917 918 919void 920usage(void) 921{ 922 const char *p; 923 924 p = lafe_getprogname(); 925 926 fprintf(stderr, "Usage:\n"); 927 fprintf(stderr, " List: %s -tf <archive-filename>\n", p); 928 fprintf(stderr, " Extract: %s -xf <archive-filename>\n", p); 929 fprintf(stderr, " Create: %s -cf <archive-filename> [filenames...]\n", p); 930 fprintf(stderr, " Help: %s --help\n", p); 931 exit(1); 932} 933 934static void 935version(void) 936{ 937 printf("bsdtar %s - %s \n", 938 BSDTAR_VERSION_STRING, 939 archive_version_details()); 940 exit(0); 941} 942 943static const char *long_help_msg = 944 "First option must be a mode specifier:\n" 945 " -c Create -r Add/Replace -t List -u Update -x Extract\n" 946 "Common Options:\n" 947 " -b # Use # 512-byte records per I/O block\n" 948 " -f <filename> Location of archive (default " _PATH_DEFTAPE ")\n" 949 " -v Verbose\n" 950 " -w Interactive\n" 951 "Create: %p -c [options] [<file> | <dir> | @<archive> | -C <dir> ]\n" 952 " <file>, <dir> add these items to archive\n" 953 " -z, -j, -J, --lzma Compress archive with gzip/bzip2/xz/lzma\n" 954 " --format {ustar|pax|cpio|shar} Select archive format\n" 955 " --exclude <pattern> Skip files that match pattern\n" 956 " -C <dir> Change to <dir> before processing remaining files\n" 957 " @<archive> Add entries from <archive> to output\n" 958 "List: %p -t [options] [<patterns>]\n" 959 " <patterns> If specified, list only entries that match\n" 960 "Extract: %p -x [options] [<patterns>]\n" 961 " <patterns> If specified, extract only entries that match\n" 962 " -k Keep (don't overwrite) existing files\n" 963 " -m Don't restore modification times\n" 964 " -O Write entries to stdout, don't restore to disk\n" 965 " -p Restore permissions (including ACLs, owner, file flags)\n"; 966 967 968/* 969 * Note that the word 'bsdtar' will always appear in the first line 970 * of output. 971 * 972 * In particular, /bin/sh scripts that need to test for the presence 973 * of bsdtar can use the following template: 974 * 975 * if (tar --help 2>&1 | grep bsdtar >/dev/null 2>&1 ) then \ 976 * echo bsdtar; else echo not bsdtar; fi 977 */ 978static void 979long_help(void) 980{ 981 const char *prog; 982 const char *p; 983 984 prog = lafe_getprogname(); 985 986 fflush(stderr); 987 988 p = (strcmp(prog,"bsdtar") != 0) ? "(bsdtar)" : ""; 989 printf("%s%s: manipulate archive files\n", prog, p); 990 991 for (p = long_help_msg; *p != '\0'; p++) { 992 if (*p == '%') { 993 if (p[1] == 'p') { 994 fputs(prog, stdout); 995 p++; 996 } else 997 putchar('%'); 998 } else 999 putchar(*p); 1000 } 1001 version(); 1002} 1003