bsdtar.c revision 315433
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 315433 2017-03-16 23:08:18Z 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 possible_help_request; 141 char buff[16]; 142 143 /* 144 * Use a pointer for consistency, but stack-allocated storage 145 * for ease of cleanup. 146 */ 147 bsdtar = &bsdtar_storage; 148 memset(bsdtar, 0, sizeof(*bsdtar)); 149 bsdtar->fd = -1; /* Mark as "unused" */ 150 bsdtar->gid = -1; 151 bsdtar->uid = -1; 152 bsdtar->flags = 0; 153 compression = compression2 = '\0'; 154 compression_name = compression2_name = NULL; 155 compress_program = NULL; 156 157#if defined(HAVE_SIGACTION) 158 { /* Set up signal handling. */ 159 struct sigaction sa; 160 sa.sa_handler = siginfo_handler; 161 sigemptyset(&sa.sa_mask); 162 sa.sa_flags = 0; 163#ifdef SIGINFO 164 if (sigaction(SIGINFO, &sa, NULL)) 165 lafe_errc(1, errno, "sigaction(SIGINFO) failed"); 166#endif 167#ifdef SIGUSR1 168 /* ... and treat SIGUSR1 the same way as SIGINFO. */ 169 if (sigaction(SIGUSR1, &sa, NULL)) 170 lafe_errc(1, errno, "sigaction(SIGUSR1) failed"); 171#endif 172#ifdef SIGPIPE 173 /* Ignore SIGPIPE signals. */ 174 sa.sa_handler = SIG_IGN; 175 sigaction(SIGPIPE, &sa, NULL); 176#endif 177 } 178#endif 179 180 /* Set lafe_progname before calling lafe_warnc. */ 181 lafe_setprogname(*argv, "bsdtar"); 182 183#if HAVE_SETLOCALE 184 if (setlocale(LC_ALL, "") == NULL) 185 lafe_warnc(0, "Failed to set default locale"); 186#endif 187#if defined(HAVE_NL_LANGINFO) && defined(HAVE_D_MD_ORDER) 188 bsdtar->day_first = (*nl_langinfo(D_MD_ORDER) == 'd'); 189#endif 190 possible_help_request = 0; 191 192 /* Look up uid of current user for future reference */ 193 bsdtar->user_uid = geteuid(); 194 195 /* Default: open tape drive. */ 196 bsdtar->filename = getenv("TAPE"); 197 if (bsdtar->filename == NULL) 198 bsdtar->filename = _PATH_DEFTAPE; 199 200 /* Default block size settings. */ 201 bsdtar->bytes_per_block = DEFAULT_BYTES_PER_BLOCK; 202 /* Allow library to default this unless user specifies -b. */ 203 bsdtar->bytes_in_last_block = -1; 204 205 /* Default: preserve mod time on extract */ 206 bsdtar->extract_flags = ARCHIVE_EXTRACT_TIME; 207 208 /* Default: Perform basic security checks. */ 209 bsdtar->extract_flags |= SECURITY; 210 211#ifndef _WIN32 212 /* On POSIX systems, assume --same-owner and -p when run by 213 * the root user. This doesn't make any sense on Windows. */ 214 if (bsdtar->user_uid == 0) { 215 /* --same-owner */ 216 bsdtar->extract_flags |= ARCHIVE_EXTRACT_OWNER; 217 /* -p */ 218 bsdtar->extract_flags |= ARCHIVE_EXTRACT_PERM; 219 bsdtar->extract_flags |= ARCHIVE_EXTRACT_ACL; 220 bsdtar->extract_flags |= ARCHIVE_EXTRACT_XATTR; 221 bsdtar->extract_flags |= ARCHIVE_EXTRACT_FFLAGS; 222 bsdtar->extract_flags |= ARCHIVE_EXTRACT_MAC_METADATA; 223 } 224#endif 225 226 /* 227 * Enable Mac OS "copyfile()" extension by default. 228 * This has no effect on other platforms. 229 */ 230 bsdtar->readdisk_flags |= ARCHIVE_READDISK_MAC_COPYFILE; 231#ifdef COPYFILE_DISABLE_VAR 232 if (getenv(COPYFILE_DISABLE_VAR)) 233 bsdtar->readdisk_flags &= ~ARCHIVE_READDISK_MAC_COPYFILE; 234#endif 235#if defined(__APPLE__) 236 /* 237 * On Mac OS ACLs are archived with copyfile() (--mac-metadata) 238 * Translation to NFSv4 ACLs has to be requested explicitly with --acls 239 */ 240 bsdtar->readdisk_flags |= ARCHIVE_READDISK_NO_ACL; 241#endif 242 243 bsdtar->matching = archive_match_new(); 244 if (bsdtar->matching == NULL) 245 lafe_errc(1, errno, "Out of memory"); 246 bsdtar->cset = cset_new(); 247 if (bsdtar->cset == NULL) 248 lafe_errc(1, errno, "Out of memory"); 249 250 bsdtar->argv = argv; 251 bsdtar->argc = argc; 252 253 /* 254 * Comments following each option indicate where that option 255 * originated: SUSv2, POSIX, GNU tar, star, etc. If there's 256 * no such comment, then I don't know of anyone else who 257 * implements that option. 258 */ 259 while ((opt = bsdtar_getopt(bsdtar)) != -1) { 260 switch (opt) { 261 case 'a': /* GNU tar */ 262 bsdtar->flags |= OPTFLAG_AUTO_COMPRESS; 263 break; 264 case OPTION_ACLS: /* GNU tar */ 265 bsdtar->extract_flags |= ARCHIVE_EXTRACT_ACL; 266 bsdtar->readdisk_flags &= ~ARCHIVE_READDISK_NO_ACL; 267 bsdtar->flags |= OPTFLAG_ACLS; 268 break; 269 case 'B': /* GNU tar */ 270 /* libarchive doesn't need this; just ignore it. */ 271 break; 272 case 'b': /* SUSv2 */ 273 t = atoi(bsdtar->argument); 274 if (t <= 0 || t > 8192) 275 lafe_errc(1, 0, 276 "Argument to -b is out of range (1..8192)"); 277 bsdtar->bytes_per_block = 512 * t; 278 /* Explicit -b forces last block size. */ 279 bsdtar->bytes_in_last_block = bsdtar->bytes_per_block; 280 break; 281 case OPTION_B64ENCODE: 282 if (compression2 != '\0') 283 lafe_errc(1, 0, 284 "Can't specify both --uuencode and " 285 "--b64encode"); 286 compression2 = opt; 287 compression2_name = "b64encode"; 288 break; 289 case 'C': /* GNU tar */ 290 if (strlen(bsdtar->argument) == 0) 291 lafe_errc(1, 0, 292 "Meaningless option: -C ''"); 293 294 set_chdir(bsdtar, bsdtar->argument); 295 break; 296 case 'c': /* SUSv2 */ 297 set_mode(bsdtar, opt); 298 break; 299 case OPTION_CHECK_LINKS: /* GNU tar */ 300 bsdtar->flags |= OPTFLAG_WARN_LINKS; 301 break; 302 case OPTION_CHROOT: /* NetBSD */ 303 bsdtar->flags |= OPTFLAG_CHROOT; 304 break; 305 case OPTION_CLEAR_NOCHANGE_FFLAGS: 306 bsdtar->extract_flags |= 307 ARCHIVE_EXTRACT_CLEAR_NOCHANGE_FFLAGS; 308 break; 309 case OPTION_EXCLUDE: /* GNU tar */ 310 if (archive_match_exclude_pattern( 311 bsdtar->matching, bsdtar->argument) != ARCHIVE_OK) 312 lafe_errc(1, 0, 313 "Couldn't exclude %s\n", bsdtar->argument); 314 break; 315 case OPTION_FFLAGS: 316 bsdtar->extract_flags |= ARCHIVE_EXTRACT_FFLAGS; 317 bsdtar->readdisk_flags &= ~ARCHIVE_READDISK_NO_FFLAGS; 318 bsdtar->flags |= OPTFLAG_FFLAGS; 319 break; 320 case OPTION_FORMAT: /* GNU tar, others */ 321 cset_set_format(bsdtar->cset, bsdtar->argument); 322 break; 323 case 'f': /* SUSv2 */ 324 bsdtar->filename = bsdtar->argument; 325 break; 326 case OPTION_GID: /* cpio */ 327 t = atoi(bsdtar->argument); 328 if (t < 0) 329 lafe_errc(1, 0, 330 "Argument to --gid must be positive"); 331 bsdtar->gid = t; 332 break; 333 case OPTION_GNAME: /* cpio */ 334 bsdtar->gname = bsdtar->argument; 335 break; 336 case OPTION_GRZIP: 337 if (compression != '\0') 338 lafe_errc(1, 0, 339 "Can't specify both -%c and -%c", opt, 340 compression); 341 compression = opt; 342 compression_name = "grzip"; 343 break; 344 case 'H': /* BSD convention */ 345 bsdtar->symlink_mode = 'H'; 346 break; 347 case 'h': /* Linux Standards Base, gtar; synonym for -L */ 348 bsdtar->symlink_mode = 'L'; 349 /* Hack: -h by itself is the "help" command. */ 350 possible_help_request = 1; 351 break; 352 case OPTION_HELP: /* GNU tar, others */ 353 long_help(); 354 exit(0); 355 break; 356 case OPTION_HFS_COMPRESSION: /* Mac OS X v10.6 or later */ 357 bsdtar->extract_flags |= 358 ARCHIVE_EXTRACT_HFS_COMPRESSION_FORCED; 359 break; 360 case OPTION_IGNORE_ZEROS: 361 bsdtar->flags |= OPTFLAG_IGNORE_ZEROS; 362 break; 363 case 'I': /* GNU tar */ 364 /* 365 * TODO: Allow 'names' to come from an archive, 366 * not just a text file. Design a good UI for 367 * allowing names and mode/owner to be read 368 * from an archive, with contents coming from 369 * disk. This can be used to "refresh" an 370 * archive or to design archives with special 371 * permissions without having to create those 372 * permissions on disk. 373 */ 374 bsdtar->names_from_file = bsdtar->argument; 375 break; 376 case OPTION_INCLUDE: 377 /* 378 * No one else has the @archive extension, so 379 * no one else needs this to filter entries 380 * when transforming archives. 381 */ 382 if (archive_match_include_pattern(bsdtar->matching, 383 bsdtar->argument) != ARCHIVE_OK) 384 lafe_errc(1, 0, 385 "Failed to add %s to inclusion list", 386 bsdtar->argument); 387 break; 388 case 'j': /* GNU tar */ 389 if (compression != '\0') 390 lafe_errc(1, 0, 391 "Can't specify both -%c and -%c", opt, 392 compression); 393 compression = opt; 394 compression_name = "bzip2"; 395 break; 396 case 'J': /* GNU tar 1.21 and later */ 397 if (compression != '\0') 398 lafe_errc(1, 0, 399 "Can't specify both -%c and -%c", opt, 400 compression); 401 compression = opt; 402 compression_name = "xz"; 403 break; 404 case 'k': /* GNU tar */ 405 bsdtar->extract_flags |= ARCHIVE_EXTRACT_NO_OVERWRITE; 406 break; 407 case OPTION_KEEP_NEWER_FILES: /* GNU tar */ 408 bsdtar->extract_flags |= ARCHIVE_EXTRACT_NO_OVERWRITE_NEWER; 409 break; 410 case 'L': /* BSD convention */ 411 bsdtar->symlink_mode = 'L'; 412 break; 413 case 'l': /* SUSv2 and GNU tar beginning with 1.16 */ 414 /* GNU tar 1.13 used -l for --one-file-system */ 415 bsdtar->flags |= OPTFLAG_WARN_LINKS; 416 break; 417 case OPTION_LRZIP: 418 case OPTION_LZ4: 419 case OPTION_LZIP: /* GNU tar beginning with 1.23 */ 420 case OPTION_LZMA: /* GNU tar beginning with 1.20 */ 421 case OPTION_LZOP: /* GNU tar beginning with 1.21 */ 422 if (compression != '\0') 423 lafe_errc(1, 0, 424 "Can't specify both -%c and -%c", opt, 425 compression); 426 compression = opt; 427 switch (opt) { 428 case OPTION_LRZIP: compression_name = "lrzip"; break; 429 case OPTION_LZ4: compression_name = "lz4"; break; 430 case OPTION_LZIP: compression_name = "lzip"; break; 431 case OPTION_LZMA: compression_name = "lzma"; break; 432 case OPTION_LZOP: compression_name = "lzop"; break; 433 } 434 break; 435 case 'm': /* SUSv2 */ 436 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_TIME; 437 break; 438 case OPTION_MAC_METADATA: /* Mac OS X */ 439 bsdtar->readdisk_flags |= ARCHIVE_READDISK_MAC_COPYFILE; 440 bsdtar->extract_flags |= ARCHIVE_EXTRACT_MAC_METADATA; 441 bsdtar->flags |= OPTFLAG_MAC_METADATA; 442 break; 443 case 'n': /* GNU tar */ 444 bsdtar->flags |= OPTFLAG_NO_SUBDIRS; 445 break; 446 /* 447 * Selecting files by time: 448 * --newer-?time='date' Only files newer than 'date' 449 * --newer-?time-than='file' Only files newer than time 450 * on specified file (useful for incremental backups) 451 */ 452 case OPTION_NEWER_CTIME: /* GNU tar */ 453 if (archive_match_include_date(bsdtar->matching, 454 ARCHIVE_MATCH_CTIME | ARCHIVE_MATCH_NEWER, 455 bsdtar->argument) != ARCHIVE_OK) 456 lafe_errc(1, 0, "Error : %s", 457 archive_error_string(bsdtar->matching)); 458 break; 459 case OPTION_NEWER_CTIME_THAN: 460 if (archive_match_include_file_time(bsdtar->matching, 461 ARCHIVE_MATCH_CTIME | ARCHIVE_MATCH_NEWER, 462 bsdtar->argument) != ARCHIVE_OK) 463 lafe_errc(1, 0, "Error : %s", 464 archive_error_string(bsdtar->matching)); 465 break; 466 case OPTION_NEWER_MTIME: /* GNU tar */ 467 if (archive_match_include_date(bsdtar->matching, 468 ARCHIVE_MATCH_MTIME | ARCHIVE_MATCH_NEWER, 469 bsdtar->argument) != ARCHIVE_OK) 470 lafe_errc(1, 0, "Error : %s", 471 archive_error_string(bsdtar->matching)); 472 break; 473 case OPTION_NEWER_MTIME_THAN: 474 if (archive_match_include_file_time(bsdtar->matching, 475 ARCHIVE_MATCH_MTIME | ARCHIVE_MATCH_NEWER, 476 bsdtar->argument) != ARCHIVE_OK) 477 lafe_errc(1, 0, "Error : %s", 478 archive_error_string(bsdtar->matching)); 479 break; 480 case OPTION_NODUMP: /* star */ 481 bsdtar->readdisk_flags |= ARCHIVE_READDISK_HONOR_NODUMP; 482 break; 483 case OPTION_NOPRESERVE_HFS_COMPRESSION: 484 /* Mac OS X v10.6 or later */ 485 bsdtar->extract_flags |= 486 ARCHIVE_EXTRACT_NO_HFS_COMPRESSION; 487 break; 488 case OPTION_NO_ACLS: /* GNU tar */ 489 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_ACL; 490 bsdtar->readdisk_flags |= ARCHIVE_READDISK_NO_ACL; 491 bsdtar->flags |= OPTFLAG_NO_ACLS; 492 break; 493 case OPTION_NO_FFLAGS: 494 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_FFLAGS; 495 bsdtar->readdisk_flags |= ARCHIVE_READDISK_NO_FFLAGS; 496 bsdtar->flags |= OPTFLAG_NO_FFLAGS; 497 break; 498 case OPTION_NO_MAC_METADATA: /* Mac OS X */ 499 bsdtar->readdisk_flags &= ~ARCHIVE_READDISK_MAC_COPYFILE; 500 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_MAC_METADATA; 501 bsdtar->flags |= OPTFLAG_NO_MAC_METADATA; 502 break; 503 case OPTION_NO_SAME_OWNER: /* GNU tar */ 504 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_OWNER; 505 break; 506 case OPTION_NO_SAME_PERMISSIONS: /* GNU tar */ 507 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_PERM; 508 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_ACL; 509 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_XATTR; 510 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_FFLAGS; 511 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_MAC_METADATA; 512 break; 513 case OPTION_NO_XATTRS: /* GNU tar */ 514 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_XATTR; 515 bsdtar->readdisk_flags |= ARCHIVE_READDISK_NO_XATTR; 516 bsdtar->flags |= OPTFLAG_NO_XATTRS; 517 break; 518 case OPTION_NULL: /* GNU tar */ 519 bsdtar->flags |= OPTFLAG_NULL; 520 break; 521 case OPTION_NUMERIC_OWNER: /* GNU tar */ 522 bsdtar->uname = ""; 523 bsdtar->gname = ""; 524 bsdtar->flags |= OPTFLAG_NUMERIC_OWNER; 525 break; 526 case 'O': /* GNU tar */ 527 bsdtar->flags |= OPTFLAG_STDOUT; 528 break; 529 case 'o': /* SUSv2 and GNU conflict here, but not fatally */ 530 bsdtar->flags |= OPTFLAG_O; 531 break; 532 /* 533 * Selecting files by time: 534 * --older-?time='date' Only files older than 'date' 535 * --older-?time-than='file' Only files older than time 536 * on specified file 537 */ 538 case OPTION_OLDER_CTIME: 539 if (archive_match_include_date(bsdtar->matching, 540 ARCHIVE_MATCH_CTIME | ARCHIVE_MATCH_OLDER, 541 bsdtar->argument) != ARCHIVE_OK) 542 lafe_errc(1, 0, "Error : %s", 543 archive_error_string(bsdtar->matching)); 544 break; 545 case OPTION_OLDER_CTIME_THAN: 546 if (archive_match_include_file_time(bsdtar->matching, 547 ARCHIVE_MATCH_CTIME | ARCHIVE_MATCH_OLDER, 548 bsdtar->argument) != ARCHIVE_OK) 549 lafe_errc(1, 0, "Error : %s", 550 archive_error_string(bsdtar->matching)); 551 break; 552 case OPTION_OLDER_MTIME: 553 if (archive_match_include_date(bsdtar->matching, 554 ARCHIVE_MATCH_MTIME | ARCHIVE_MATCH_OLDER, 555 bsdtar->argument) != ARCHIVE_OK) 556 lafe_errc(1, 0, "Error : %s", 557 archive_error_string(bsdtar->matching)); 558 break; 559 case OPTION_OLDER_MTIME_THAN: 560 if (archive_match_include_file_time(bsdtar->matching, 561 ARCHIVE_MATCH_MTIME | ARCHIVE_MATCH_OLDER, 562 bsdtar->argument) != ARCHIVE_OK) 563 lafe_errc(1, 0, "Error : %s", 564 archive_error_string(bsdtar->matching)); 565 break; 566 case OPTION_ONE_FILE_SYSTEM: /* GNU tar */ 567 bsdtar->readdisk_flags |= 568 ARCHIVE_READDISK_NO_TRAVERSE_MOUNTS; 569 break; 570 case OPTION_OPTIONS: 571 bsdtar->option_options = bsdtar->argument; 572 break; 573#if 0 574 /* 575 * The common BSD -P option is not necessary, since 576 * our default is to archive symlinks, not follow 577 * them. This is convenient, as -P conflicts with GNU 578 * tar anyway. 579 */ 580 case 'P': /* BSD convention */ 581 /* Default behavior, no option necessary. */ 582 break; 583#endif 584 case 'P': /* GNU tar */ 585 bsdtar->extract_flags &= ~SECURITY; 586 bsdtar->flags |= OPTFLAG_ABSOLUTE_PATHS; 587 break; 588 case 'p': /* GNU tar, star */ 589 bsdtar->extract_flags |= ARCHIVE_EXTRACT_PERM; 590 bsdtar->extract_flags |= ARCHIVE_EXTRACT_ACL; 591 bsdtar->extract_flags |= ARCHIVE_EXTRACT_XATTR; 592 bsdtar->extract_flags |= ARCHIVE_EXTRACT_FFLAGS; 593 bsdtar->extract_flags |= ARCHIVE_EXTRACT_MAC_METADATA; 594 break; 595 case OPTION_PASSPHRASE: 596 bsdtar->passphrase = bsdtar->argument; 597 break; 598 case OPTION_POSIX: /* GNU tar */ 599 cset_set_format(bsdtar->cset, "pax"); 600 break; 601 case 'q': /* FreeBSD GNU tar --fast-read, NetBSD -q */ 602 bsdtar->flags |= OPTFLAG_FAST_READ; 603 break; 604 case 'r': /* SUSv2 */ 605 set_mode(bsdtar, opt); 606 break; 607 case 'S': /* NetBSD pax-as-tar */ 608 bsdtar->extract_flags |= ARCHIVE_EXTRACT_SPARSE; 609 break; 610 case 's': /* NetBSD pax-as-tar */ 611#if defined(HAVE_REGEX_H) || defined(HAVE_PCREPOSIX_H) 612 add_substitution(bsdtar, bsdtar->argument); 613#else 614 lafe_warnc(0, 615 "-s is not supported by this version of bsdtar"); 616 usage(); 617#endif 618 break; 619 case OPTION_SAME_OWNER: /* GNU tar */ 620 bsdtar->extract_flags |= ARCHIVE_EXTRACT_OWNER; 621 break; 622 case OPTION_STRIP_COMPONENTS: /* GNU tar 1.15 */ 623 errno = 0; 624 bsdtar->strip_components = strtol(bsdtar->argument, 625 NULL, 0); 626 if (errno) 627 lafe_errc(1, 0, 628 "Invalid --strip-components argument: %s", 629 bsdtar->argument); 630 break; 631 case 'T': /* GNU tar */ 632 bsdtar->names_from_file = bsdtar->argument; 633 break; 634 case 't': /* SUSv2 */ 635 set_mode(bsdtar, opt); 636 bsdtar->verbose++; 637 break; 638 case OPTION_TOTALS: /* GNU tar */ 639 bsdtar->flags |= OPTFLAG_TOTALS; 640 break; 641 case 'U': /* GNU tar */ 642 bsdtar->extract_flags |= ARCHIVE_EXTRACT_UNLINK; 643 bsdtar->flags |= OPTFLAG_UNLINK_FIRST; 644 break; 645 case 'u': /* SUSv2 */ 646 set_mode(bsdtar, opt); 647 break; 648 case OPTION_UID: /* cpio */ 649 t = atoi(bsdtar->argument); 650 if (t < 0) 651 lafe_errc(1, 0, 652 "Argument to --uid must be positive"); 653 bsdtar->uid = t; 654 break; 655 case OPTION_UNAME: /* cpio */ 656 bsdtar->uname = bsdtar->argument; 657 break; 658 case OPTION_UUENCODE: 659 if (compression2 != '\0') 660 lafe_errc(1, 0, 661 "Can't specify both --uuencode and " 662 "--b64encode"); 663 compression2 = opt; 664 compression2_name = "uuencode"; 665 break; 666 case 'v': /* SUSv2 */ 667 bsdtar->verbose++; 668 break; 669 case OPTION_VERSION: /* GNU convention */ 670 version(); 671 break; 672#if 0 673 /* 674 * The -W longopt feature is handled inside of 675 * bsdtar_getopt(), so -W is not available here. 676 */ 677 case 'W': /* Obscure GNU convention. */ 678 break; 679#endif 680 case 'w': /* SUSv2 */ 681 bsdtar->flags |= OPTFLAG_INTERACTIVE; 682 break; 683 case 'X': /* GNU tar */ 684 if (archive_match_exclude_pattern_from_file( 685 bsdtar->matching, bsdtar->argument, 0) 686 != ARCHIVE_OK) 687 lafe_errc(1, 0, "Error : %s", 688 archive_error_string(bsdtar->matching)); 689 break; 690 case 'x': /* SUSv2 */ 691 set_mode(bsdtar, opt); 692 break; 693 case OPTION_XATTRS: /* GNU tar */ 694 bsdtar->extract_flags |= ARCHIVE_EXTRACT_XATTR; 695 bsdtar->readdisk_flags &= ~ARCHIVE_READDISK_NO_XATTR; 696 bsdtar->flags |= OPTFLAG_XATTRS; 697 break; 698 case 'y': /* FreeBSD version of GNU tar */ 699 if (compression != '\0') 700 lafe_errc(1, 0, 701 "Can't specify both -%c and -%c", opt, 702 compression); 703 compression = opt; 704 compression_name = "bzip2"; 705 break; 706 case 'Z': /* GNU tar */ 707 if (compression != '\0') 708 lafe_errc(1, 0, 709 "Can't specify both -%c and -%c", opt, 710 compression); 711 compression = opt; 712 compression_name = "compress"; 713 break; 714 case 'z': /* GNU tar, star, many others */ 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 = "gzip"; 721 break; 722 case OPTION_USE_COMPRESS_PROGRAM: 723 compress_program = bsdtar->argument; 724 break; 725 default: 726 usage(); 727 } 728 } 729 730 /* 731 * Sanity-check options. 732 */ 733 734 /* If no "real" mode was specified, treat -h as --help. */ 735 if ((bsdtar->mode == '\0') && possible_help_request) { 736 long_help(); 737 exit(0); 738 } 739 740 /* Otherwise, a mode is required. */ 741 if (bsdtar->mode == '\0') 742 lafe_errc(1, 0, 743 "Must specify one of -c, -r, -t, -u, -x"); 744 745 /* Check boolean options only permitted in certain modes. */ 746 if (bsdtar->flags & OPTFLAG_AUTO_COMPRESS) 747 only_mode(bsdtar, "-a", "c"); 748 if (bsdtar->readdisk_flags & ARCHIVE_READDISK_NO_TRAVERSE_MOUNTS) 749 only_mode(bsdtar, "--one-file-system", "cru"); 750 if (bsdtar->flags & OPTFLAG_FAST_READ) 751 only_mode(bsdtar, "--fast-read", "xt"); 752 if (bsdtar->extract_flags & ARCHIVE_EXTRACT_HFS_COMPRESSION_FORCED) 753 only_mode(bsdtar, "--hfsCompression", "x"); 754 if (bsdtar->extract_flags & ARCHIVE_EXTRACT_NO_HFS_COMPRESSION) 755 only_mode(bsdtar, "--nopreserveHFSCompression", "x"); 756 if (bsdtar->readdisk_flags & ARCHIVE_READDISK_HONOR_NODUMP) 757 only_mode(bsdtar, "--nodump", "cru"); 758 if (bsdtar->flags & OPTFLAG_ACLS) 759 only_mode(bsdtar, "--acls", "crux"); 760 if (bsdtar->flags & OPTFLAG_NO_ACLS) 761 only_mode(bsdtar, "--no-acls", "crux"); 762 if (bsdtar->flags & OPTFLAG_XATTRS) 763 only_mode(bsdtar, "--xattrs", "crux"); 764 if (bsdtar->flags & OPTFLAG_NO_XATTRS) 765 only_mode(bsdtar, "--no-xattrs", "crux"); 766 if (bsdtar->flags & OPTFLAG_FFLAGS) 767 only_mode(bsdtar, "--fflags", "crux"); 768 if (bsdtar->flags & OPTFLAG_NO_FFLAGS) 769 only_mode(bsdtar, "--no-fflags", "crux"); 770 if (bsdtar->flags & OPTFLAG_MAC_METADATA) 771 only_mode(bsdtar, "--mac-metadata", "crux"); 772 if (bsdtar->flags & OPTFLAG_NO_MAC_METADATA) 773 only_mode(bsdtar, "--no-mac-metadata", "crux"); 774 if (bsdtar->flags & OPTFLAG_O) { 775 switch (bsdtar->mode) { 776 case 'c': 777 /* 778 * In GNU tar, -o means "old format." The 779 * "ustar" format is the closest thing 780 * supported by libarchive. 781 */ 782 cset_set_format(bsdtar->cset, "ustar"); 783 /* TODO: bsdtar->create_format = "v7"; */ 784 break; 785 case 'x': 786 /* POSIX-compatible behavior. */ 787 bsdtar->flags |= OPTFLAG_NO_OWNER; 788 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_OWNER; 789 break; 790 default: 791 only_mode(bsdtar, "-o", "xc"); 792 break; 793 } 794 } 795 if (bsdtar->flags & OPTFLAG_NO_SUBDIRS) 796 only_mode(bsdtar, "-n", "cru"); 797 if (bsdtar->flags & OPTFLAG_STDOUT) 798 only_mode(bsdtar, "-O", "xt"); 799 if (bsdtar->flags & OPTFLAG_UNLINK_FIRST) 800 only_mode(bsdtar, "-U", "x"); 801 if (bsdtar->flags & OPTFLAG_WARN_LINKS) 802 only_mode(bsdtar, "--check-links", "cr"); 803 804 if ((bsdtar->flags & OPTFLAG_AUTO_COMPRESS) && 805 cset_auto_compress(bsdtar->cset, bsdtar->filename)) { 806 /* Ignore specified compressions if auto-compress works. */ 807 compression = '\0'; 808 compression2 = '\0'; 809 } 810 /* Check other parameters only permitted in certain modes. */ 811 if (compress_program != NULL) { 812 only_mode(bsdtar, "--use-compress-program", "cxt"); 813 cset_add_filter_program(bsdtar->cset, compress_program); 814 /* Ignore specified compressions. */ 815 compression = '\0'; 816 compression2 = '\0'; 817 } 818 if (compression != '\0') { 819 switch (compression) { 820 case 'J': case 'j': case 'y': case 'Z': case 'z': 821 strcpy(buff, "-?"); 822 buff[1] = compression; 823 break; 824 default: 825 strcpy(buff, "--"); 826 strcat(buff, compression_name); 827 break; 828 } 829 only_mode(bsdtar, buff, "cxt"); 830 cset_add_filter(bsdtar->cset, compression_name); 831 } 832 if (compression2 != '\0') { 833 strcpy(buff, "--"); 834 strcat(buff, compression2_name); 835 only_mode(bsdtar, buff, "cxt"); 836 cset_add_filter(bsdtar->cset, compression2_name); 837 } 838 if (cset_get_format(bsdtar->cset) != NULL) 839 only_mode(bsdtar, "--format", "cru"); 840 if (bsdtar->symlink_mode != '\0') { 841 strcpy(buff, "-?"); 842 buff[1] = bsdtar->symlink_mode; 843 only_mode(bsdtar, buff, "cru"); 844 } 845 846 /* Filename "-" implies stdio. */ 847 if (strcmp(bsdtar->filename, "-") == 0) 848 bsdtar->filename = NULL; 849 850 switch(bsdtar->mode) { 851 case 'c': 852 tar_mode_c(bsdtar); 853 break; 854 case 'r': 855 tar_mode_r(bsdtar); 856 break; 857 case 't': 858 tar_mode_t(bsdtar); 859 break; 860 case 'u': 861 tar_mode_u(bsdtar); 862 break; 863 case 'x': 864 tar_mode_x(bsdtar); 865 break; 866 } 867 868 archive_match_free(bsdtar->matching); 869#if defined(HAVE_REGEX_H) || defined(HAVE_PCREPOSIX_H) 870 cleanup_substitution(bsdtar); 871#endif 872 cset_free(bsdtar->cset); 873 passphrase_free(bsdtar->ppbuff); 874 875 if (bsdtar->return_value != 0) 876 lafe_warnc(0, 877 "Error exit delayed from previous errors."); 878 return (bsdtar->return_value); 879} 880 881static void 882set_mode(struct bsdtar *bsdtar, char opt) 883{ 884 if (bsdtar->mode != '\0' && bsdtar->mode != opt) 885 lafe_errc(1, 0, 886 "Can't specify both -%c and -%c", opt, bsdtar->mode); 887 bsdtar->mode = opt; 888} 889 890/* 891 * Verify that the mode is correct. 892 */ 893static void 894only_mode(struct bsdtar *bsdtar, const char *opt, const char *valid_modes) 895{ 896 if (strchr(valid_modes, bsdtar->mode) == NULL) 897 lafe_errc(1, 0, 898 "Option %s is not permitted in mode -%c", 899 opt, bsdtar->mode); 900} 901 902 903void 904usage(void) 905{ 906 const char *p; 907 908 p = lafe_getprogname(); 909 910 fprintf(stderr, "Usage:\n"); 911 fprintf(stderr, " List: %s -tf <archive-filename>\n", p); 912 fprintf(stderr, " Extract: %s -xf <archive-filename>\n", p); 913 fprintf(stderr, " Create: %s -cf <archive-filename> [filenames...]\n", p); 914 fprintf(stderr, " Help: %s --help\n", p); 915 exit(1); 916} 917 918static void 919version(void) 920{ 921 printf("bsdtar %s - %s\n", 922 BSDTAR_VERSION_STRING, 923 archive_version_details()); 924 exit(0); 925} 926 927static const char *long_help_msg = 928 "First option must be a mode specifier:\n" 929 " -c Create -r Add/Replace -t List -u Update -x Extract\n" 930 "Common Options:\n" 931 " -b # Use # 512-byte records per I/O block\n" 932 " -f <filename> Location of archive (default " _PATH_DEFTAPE ")\n" 933 " -v Verbose\n" 934 " -w Interactive\n" 935 "Create: %p -c [options] [<file> | <dir> | @<archive> | -C <dir> ]\n" 936 " <file>, <dir> add these items to archive\n" 937 " -z, -j, -J, --lzma Compress archive with gzip/bzip2/xz/lzma\n" 938 " --format {ustar|pax|cpio|shar} Select archive format\n" 939 " --exclude <pattern> Skip files that match pattern\n" 940 " -C <dir> Change to <dir> before processing remaining files\n" 941 " @<archive> Add entries from <archive> to output\n" 942 "List: %p -t [options] [<patterns>]\n" 943 " <patterns> If specified, list only entries that match\n" 944 "Extract: %p -x [options] [<patterns>]\n" 945 " <patterns> If specified, extract only entries that match\n" 946 " -k Keep (don't overwrite) existing files\n" 947 " -m Don't restore modification times\n" 948 " -O Write entries to stdout, don't restore to disk\n" 949 " -p Restore permissions (including ACLs, owner, file flags)\n"; 950 951 952/* 953 * Note that the word 'bsdtar' will always appear in the first line 954 * of output. 955 * 956 * In particular, /bin/sh scripts that need to test for the presence 957 * of bsdtar can use the following template: 958 * 959 * if (tar --help 2>&1 | grep bsdtar >/dev/null 2>&1 ) then \ 960 * echo bsdtar; else echo not bsdtar; fi 961 */ 962static void 963long_help(void) 964{ 965 const char *prog; 966 const char *p; 967 968 prog = lafe_getprogname(); 969 970 fflush(stderr); 971 972 p = (strcmp(prog,"bsdtar") != 0) ? "(bsdtar)" : ""; 973 printf("%s%s: manipulate archive files\n", prog, p); 974 975 for (p = long_help_msg; *p != '\0'; p++) { 976 if (*p == '%') { 977 if (p[1] == 'p') { 978 fputs(prog, stdout); 979 p++; 980 } else 981 putchar('%'); 982 } else 983 putchar(*p); 984 } 985 version(); 986} 987