contrib/libarchive/tar/bsdtar.c

   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("$FreeBSD$");
  28
  29 #ifdef HAVE_SYS_PARAM_H
  30 #include <sys/param.h>
  31 #endif
  32 #ifdef HAVE_SYS_STAT_H
  33 #include <sys/stat.h>
  34 #endif
  35 #ifdef HAVE_COPYFILE_H
  36 #include <copyfile.h>
  37 #endif
  38 #ifdef HAVE_ERRNO_H
  39 #include <errno.h>
  40 #endif
  41 #ifdef HAVE_FCNTL_H
  42 #include <fcntl.h>
  43 #endif
  44 #ifdef HAVE_LANGINFO_H
  45 #include <langinfo.h>
  46 #endif
  47 #ifdef HAVE_LOCALE_H
  48 #include <locale.h>
  49 #endif
  50 #ifdef HAVE_PATHS_H
  51 #include <paths.h>
  52 #endif
  53 #ifdef HAVE_SIGNAL_H
  54 #include <signal.h>
  55 #endif
  56 #include <stdio.h>
  57 #ifdef HAVE_STDLIB_H
  58 #include <stdlib.h>
  59 #endif
  60 #ifdef HAVE_STRING_H
  61 #include <string.h>
  62 #endif
  63 #ifdef HAVE_TIME_H
  64 #include <time.h>
  65 #endif
  66 #ifdef HAVE_UNISTD_H
  67 #include <unistd.h>
  68 #endif
  69
  70 #include "bsdtar.h"
  71 #include "err.h"
  72
  73 /*
  74  * Per POSIX.1-1988, tar defaults to reading/writing archives to/from
  75  * the default tape device for the system.  Pick something reasonable here.
  76  */
  77 #ifdef __linux
  78 #define _PATH_DEFTAPE "/dev/st0"
  79 #endif
  80 #if defined(_WIN32) && !defined(__CYGWIN__)
  81 #define _PATH_DEFTAPE "\\\\.\\tape0"
  82 #endif
  83 #if defined(__APPLE__)
  84 #undef _PATH_DEFTAPE
  85 #define _PATH_DEFTAPE "-"  /* Mac OS has no tape support, default to stdio. */
  86 #endif
  87
  88 #ifndef _PATH_DEFTAPE
  89 #define _PATH_DEFTAPE "/dev/tape"
  90 #endif
  91
  92 #ifdef __MINGW32__
  93 int _CRT_glob = 0; /* Disable broken CRT globbing. */
  94 #endif
  95
  96 #if defined(HAVE_SIGACTION) && (defined(SIGINFO) || defined(SIGUSR1))
  97 static volatile int siginfo_occurred;
  98
  99 static void
 100 siginfo_handler(int sig)
 101 {
 102         (void)sig; /* UNUSED */
 103         siginfo_occurred = 1;
 104 }
 105
 106 int
 107 need_report(void)
 108 {
 109         int r = siginfo_occurred;
 110         siginfo_occurred = 0;
 111         return (r);
 112 }
 113 #else
 114 int
 115 need_report(void)
 116 {
 117         return (0);
 118 }
 119 #endif
 120
 121 static void              long_help(void) __LA_DEAD;
 122 static void              only_mode(struct bsdtar *, const char *opt,
 123                              const char *valid);
 124 static void              set_mode(struct bsdtar *, char opt);
 125 static void              version(void) __LA_DEAD;
 126
 127 /* A basic set of security flags to request from libarchive. */
 128 #define SECURITY                                        \
 129         (ARCHIVE_EXTRACT_SECURE_SYMLINKS                \
 130          | ARCHIVE_EXTRACT_SECURE_NODOTDOT)
 131
 132 static char const * const vcs_files[] = {
 133   /* CVS */
 134   "CVS", ".cvsignore",
 135   /* RCS */
 136   "RCS",
 137   /* SCCS */
 138   "SCCS",
 139   /* SVN */
 140   ".svn",
 141   /* git */
 142   ".git", ".gitignore", ".gitattributes", ".gitmodules",
 143   /* Arch */
 144   ".arch-ids", "{arch}", "=RELEASE-ID", "=meta-update", "=update",
 145   /* Bazaar */
 146   ".bzr", ".bzrignore", ".bzrtags",
 147   /* Mercurial */
 148   ".hg", ".hgignore", ".hgtags",
 149   /* darcs */
 150   "_darcs",
 151   NULL
 152 };
 153
 154 int
 155 main(int argc, char **argv)
 156 {
 157         struct bsdtar           *bsdtar, bsdtar_storage;
 158         int                      opt, t;
 159         char                     compression, compression2;
 160         const char              *compression_name, *compression2_name;
 161         const char              *compress_program;
 162         char                    *tptr;
 163         char                     possible_help_request;
 164         char                     buff[16];
 165
 166         /*
 167          * Use a pointer for consistency, but stack-allocated storage
 168          * for ease of cleanup.
 169          */
 170         bsdtar = &bsdtar_storage;
 171         memset(bsdtar, 0, sizeof(*bsdtar));
 172         bsdtar->fd = -1; /* Mark as "unused" */
 173         bsdtar->gid = -1;
 174         bsdtar->uid = -1;
 175         bsdtar->flags = 0;
 176         compression = compression2 = '\0';
 177         compression_name = compression2_name = NULL;
 178         compress_program = NULL;
 179
 180 #if defined(HAVE_SIGACTION)
 181         { /* Set up signal handling. */
 182                 struct sigaction sa;
 183                 sa.sa_handler = siginfo_handler;
 184                 sigemptyset(&sa.sa_mask);
 185                 sa.sa_flags = 0;
 186 #ifdef SIGINFO
 187                 if (sigaction(SIGINFO, &sa, NULL))
 188                         lafe_errc(1, errno, "sigaction(SIGINFO) failed");
 189 #endif
 190 #ifdef SIGUSR1
 191                 /* ... and treat SIGUSR1 the same way as SIGINFO. */
 192                 if (sigaction(SIGUSR1, &sa, NULL))
 193                         lafe_errc(1, errno, "sigaction(SIGUSR1) failed");
 194 #endif
 195 #ifdef SIGPIPE
 196                 /* Ignore SIGPIPE signals. */
 197                 sa.sa_handler = SIG_IGN;
 198                 sigaction(SIGPIPE, &sa, NULL);
 199 #endif
 200         }
 201 #endif
 202
 203         /* Set lafe_progname before calling lafe_warnc. */
 204         lafe_setprogname(*argv, "bsdtar");
 205
 206 #if HAVE_SETLOCALE
 207         if (setlocale(LC_ALL, "") == NULL)
 208                 lafe_warnc(0, "Failed to set default locale");
 209 #endif
 210 #if defined(HAVE_NL_LANGINFO) && defined(HAVE_D_MD_ORDER)
 211         bsdtar->day_first = (*nl_langinfo(D_MD_ORDER) == 'd');
 212 #endif
 213         possible_help_request = 0;
 214
 215         /* Look up uid of current user for future reference */
 216         bsdtar->user_uid = geteuid();
 217
 218         /* Default: open tape drive. */
 219         bsdtar->filename = getenv("TAPE");
 220         if (bsdtar->filename == NULL)
 221                 bsdtar->filename = _PATH_DEFTAPE;
 222
 223         /* Default block size settings. */
 224         bsdtar->bytes_per_block = DEFAULT_BYTES_PER_BLOCK;
 225         /* Allow library to default this unless user specifies -b. */
 226         bsdtar->bytes_in_last_block = -1;
 227
 228         /* Default: preserve mod time on extract */
 229         bsdtar->extract_flags = ARCHIVE_EXTRACT_TIME;
 230
 231         /* Default: Perform basic security checks. */
 232         bsdtar->extract_flags |= SECURITY;
 233
 234 #ifndef _WIN32
 235         /* On POSIX systems, assume --same-owner and -p when run by
 236          * the root user.  This doesn't make any sense on Windows. */
 237         if (bsdtar->user_uid == 0) {
 238                 /* --same-owner */
 239                 bsdtar->extract_flags |= ARCHIVE_EXTRACT_OWNER;
 240                 /* -p */
 241                 bsdtar->extract_flags |= ARCHIVE_EXTRACT_PERM;
 242                 bsdtar->extract_flags |= ARCHIVE_EXTRACT_ACL;
 243                 bsdtar->extract_flags |= ARCHIVE_EXTRACT_XATTR;
 244                 bsdtar->extract_flags |= ARCHIVE_EXTRACT_FFLAGS;
 245                 bsdtar->extract_flags |= ARCHIVE_EXTRACT_MAC_METADATA;
 246         }
 247 #endif
 248
 249         /*
 250          * Enable Mac OS "copyfile()" extension by default.
 251          * This has no effect on other platforms.
 252          */
 253         bsdtar->readdisk_flags |= ARCHIVE_READDISK_MAC_COPYFILE;
 254 #ifdef COPYFILE_DISABLE_VAR
 255         if (getenv(COPYFILE_DISABLE_VAR))
 256                 bsdtar->readdisk_flags &= ~ARCHIVE_READDISK_MAC_COPYFILE;
 257 #endif
 258 #if defined(__APPLE__)
 259         /*
 260          * On Mac OS ACLs are archived with copyfile() (--mac-metadata)
 261          * Translation to NFSv4 ACLs has to be requested explicitly with --acls
 262          */
 263         bsdtar->readdisk_flags |= ARCHIVE_READDISK_NO_ACL;
 264 #endif
 265
 266         bsdtar->matching = archive_match_new();
 267         if (bsdtar->matching == NULL)
 268                 lafe_errc(1, errno, "Out of memory");
 269         bsdtar->cset = cset_new();
 270         if (bsdtar->cset == NULL)
 271                 lafe_errc(1, errno, "Out of memory");
 272
 273         bsdtar->argv = argv;
 274         bsdtar->argc = argc;
 275
 276         /*
 277          * Comments following each option indicate where that option
 278          * originated:  SUSv2, POSIX, GNU tar, star, etc.  If there's
 279          * no such comment, then I don't know of anyone else who
 280          * implements that option.
 281          */
 282         while ((opt = bsdtar_getopt(bsdtar)) != -1) {
 283                 switch (opt) {
 284                 case 'a': /* GNU tar */
 285                         bsdtar->flags |= OPTFLAG_AUTO_COMPRESS;
 286                         break;
 287                 case OPTION_ACLS: /* GNU tar */
 288                         bsdtar->extract_flags |= ARCHIVE_EXTRACT_ACL;
 289                         bsdtar->readdisk_flags &= ~ARCHIVE_READDISK_NO_ACL;
 290                         bsdtar->flags |= OPTFLAG_ACLS;
 291                         break;
 292                 case 'B': /* GNU tar */
 293                         /* libarchive doesn't need this; just ignore it. */
 294                         break;
 295                 case 'b': /* SUSv2 */
 296                         errno = 0;
 297                         tptr = NULL;
 298                         t = (int)strtol(bsdtar->argument, &tptr, 10);
 299                         if (errno || t <= 0 || t > 8192 ||
 300                             *(bsdtar->argument) == '\0' || tptr == NULL ||
 301                             *tptr != '\0') {
 302                                 lafe_errc(1, 0, "Invalid or out of range "
 303                                     "(1..8192) argument to -b");
 304                         }
 305                         bsdtar->bytes_per_block = 512 * t;
 306                         /* Explicit -b forces last block size. */
 307                         bsdtar->bytes_in_last_block = bsdtar->bytes_per_block;
 308                         break;
 309                 case OPTION_B64ENCODE:
 310                         if (compression2 != '\0')
 311                                 lafe_errc(1, 0,
 312                                     "Can't specify both --uuencode and "
 313                                     "--b64encode");
 314                         compression2 = opt;
 315                         compression2_name = "b64encode";
 316                         break;
 317                 case 'C': /* GNU tar */
 318                         if (strlen(bsdtar->argument) == 0)
 319                                 lafe_errc(1, 0,
 320                                     "Meaningless option: -C ''");
 321
 322                         set_chdir(bsdtar, bsdtar->argument);
 323                         break;
 324                 case 'c': /* SUSv2 */
 325                         set_mode(bsdtar, opt);
 326                         break;
 327                 case OPTION_CHECK_LINKS: /* GNU tar */
 328                         bsdtar->flags |= OPTFLAG_WARN_LINKS;
 329                         break;
 330                 case OPTION_CHROOT: /* NetBSD */
 331                         bsdtar->flags |= OPTFLAG_CHROOT;
 332                         break;
 333                 case OPTION_CLEAR_NOCHANGE_FFLAGS:
 334                         bsdtar->extract_flags |=
 335                             ARCHIVE_EXTRACT_CLEAR_NOCHANGE_FFLAGS;
 336                         break;
 337                 case OPTION_EXCLUDE: /* GNU tar */
 338                         if (archive_match_exclude_pattern(
 339                             bsdtar->matching, bsdtar->argument) != ARCHIVE_OK)
 340                                 lafe_errc(1, 0,
 341                                     "Couldn't exclude %s\n", bsdtar->argument);
 342                         break;
 343                 case OPTION_EXCLUDE_VCS: /* GNU tar */
 344                         for(t=0; vcs_files[t]; t++) {
 345                                 if (archive_match_exclude_pattern(
 346                                     bsdtar->matching,
 347                                     vcs_files[t]) != ARCHIVE_OK)
 348                                         lafe_errc(1, 0, "Couldn't "
 349                                             "exclude %s\n", vcs_files[t]);
 350                         }
 351                         break;
 352                 case OPTION_FFLAGS:
 353                         bsdtar->extract_flags |= ARCHIVE_EXTRACT_FFLAGS;
 354                         bsdtar->readdisk_flags &= ~ARCHIVE_READDISK_NO_FFLAGS;
 355                         bsdtar->flags |= OPTFLAG_FFLAGS;
 356                         break;
 357                 case OPTION_FORMAT: /* GNU tar, others */
 358                         cset_set_format(bsdtar->cset, bsdtar->argument);
 359                         break;
 360                 case 'f': /* SUSv2 */
 361                         bsdtar->filename = bsdtar->argument;
 362                         break;
 363                 case OPTION_GID: /* cpio */
 364                         errno = 0;
 365                         tptr = NULL;
 366                         t = (int)strtol(bsdtar->argument, &tptr, 10);
 367                         if (errno || t < 0 || *(bsdtar->argument) == '\0' ||
 368                             tptr == NULL || *tptr != '\0') {
 369                                 lafe_errc(1, 0, "Invalid argument to --gid");
 370                         }
 371                         bsdtar->gid = t;
 372                         break;
 373                 case OPTION_GNAME: /* cpio */
 374                         bsdtar->gname = bsdtar->argument;
 375                         break;
 376                 case OPTION_GRZIP:
 377                         if (compression != '\0')
 378                                 lafe_errc(1, 0,
 379                                     "Can't specify both -%c and -%c", opt,
 380                                     compression);
 381                         compression = opt;
 382                         compression_name = "grzip";
 383                         break;
 384                 case 'H': /* BSD convention */
 385                         bsdtar->symlink_mode = 'H';
 386                         break;
 387                 case 'h': /* Linux Standards Base, gtar; synonym for -L */
 388                         bsdtar->symlink_mode = 'L';
 389                         /* Hack: -h by itself is the "help" command. */
 390                         possible_help_request = 1;
 391                         break;
 392                 case OPTION_HELP: /* GNU tar, others */
 393                         long_help();
 394                         exit(0);
 395                         break;
 396                 case OPTION_HFS_COMPRESSION: /* Mac OS X v10.6 or later */
 397                         bsdtar->extract_flags |=
 398                             ARCHIVE_EXTRACT_HFS_COMPRESSION_FORCED;
 399                         break;
 400                 case OPTION_IGNORE_ZEROS:
 401                         bsdtar->flags |= OPTFLAG_IGNORE_ZEROS;
 402                         break;
 403                 case 'I': /* GNU tar */
 404                         /*
 405                          * TODO: Allow 'names' to come from an archive,
 406                          * not just a text file.  Design a good UI for
 407                          * allowing names and mode/owner to be read
 408                          * from an archive, with contents coming from
 409                          * disk.  This can be used to "refresh" an
 410                          * archive or to design archives with special
 411                          * permissions without having to create those
 412                          * permissions on disk.
 413                          */
 414                         bsdtar->names_from_file = bsdtar->argument;
 415                         break;
 416                 case OPTION_INCLUDE:
 417                         /*
 418                          * No one else has the @archive extension, so
 419                          * no one else needs this to filter entries
 420                          * when transforming archives.
 421                          */
 422                         if (archive_match_include_pattern(bsdtar->matching,
 423                             bsdtar->argument) != ARCHIVE_OK)
 424                                 lafe_errc(1, 0,
 425                                     "Failed to add %s to inclusion list",
 426                                     bsdtar->argument);
 427                         break;
 428                 case 'j': /* GNU tar */
 429                         if (compression != '\0')
 430                                 lafe_errc(1, 0,
 431                                     "Can't specify both -%c and -%c", opt,
 432                                     compression);
 433                         compression = opt;
 434                         compression_name = "bzip2";
 435                         break;
 436                 case 'J': /* GNU tar 1.21 and later */
 437                         if (compression != '\0')
 438                                 lafe_errc(1, 0,
 439                                     "Can't specify both -%c and -%c", opt,
 440                                     compression);
 441                         compression = opt;
 442                         compression_name = "xz";
 443                         break;
 444                 case 'k': /* GNU tar */
 445                         bsdtar->extract_flags |= ARCHIVE_EXTRACT_NO_OVERWRITE;
 446                         break;
 447                 case OPTION_KEEP_NEWER_FILES: /* GNU tar */
 448                         bsdtar->extract_flags |= ARCHIVE_EXTRACT_NO_OVERWRITE_NEWER;
 449                         break;
 450                 case 'L': /* BSD convention */
 451                         bsdtar->symlink_mode = 'L';
 452                         break;
 453                 case 'l': /* SUSv2 and GNU tar beginning with 1.16 */
 454                         /* GNU tar 1.13  used -l for --one-file-system */
 455                         bsdtar->flags |= OPTFLAG_WARN_LINKS;
 456                         break;
 457                 case OPTION_LRZIP:
 458                 case OPTION_LZ4:
 459                 case OPTION_LZIP: /* GNU tar beginning with 1.23 */
 460                 case OPTION_LZMA: /* GNU tar beginning with 1.20 */
 461                 case OPTION_LZOP: /* GNU tar beginning with 1.21 */
 462                 case OPTION_ZSTD:
 463                         if (compression != '\0')
 464                                 lafe_errc(1, 0,
 465                                     "Can't specify both -%c and -%c", opt,
 466                                     compression);
 467                         compression = opt;
 468                         switch (opt) {
 469                         case OPTION_LRZIP: compression_name = "lrzip"; break;
 470                         case OPTION_LZ4:  compression_name = "lz4"; break;
 471                         case OPTION_LZIP: compression_name = "lzip"; break;
 472                         case OPTION_LZMA: compression_name = "lzma"; break;
 473                         case OPTION_LZOP: compression_name = "lzop"; break;
 474                         case OPTION_ZSTD: compression_name = "zstd"; break;
 475                         }
 476                         break;
 477                 case 'm': /* SUSv2 */
 478                         bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_TIME;
 479                         break;
 480                 case OPTION_MAC_METADATA: /* Mac OS X */
 481                         bsdtar->readdisk_flags |= ARCHIVE_READDISK_MAC_COPYFILE;
 482                         bsdtar->extract_flags |= ARCHIVE_EXTRACT_MAC_METADATA;
 483                         bsdtar->flags |= OPTFLAG_MAC_METADATA;
 484                         break;
 485                 case 'n': /* GNU tar */
 486                         bsdtar->flags |= OPTFLAG_NO_SUBDIRS;
 487                         break;
 488                 /*
 489                  * Selecting files by time:
 490                  *    --newer-?time='date' Only files newer than 'date'
 491                  *    --newer-?time-than='file' Only files newer than time
 492                  *         on specified file (useful for incremental backups)
 493                  */
 494                 case OPTION_NEWER_CTIME: /* GNU tar */
 495                         if (archive_match_include_date(bsdtar->matching,
 496                             ARCHIVE_MATCH_CTIME | ARCHIVE_MATCH_NEWER,
 497                             bsdtar->argument) != ARCHIVE_OK)
 498                                 lafe_errc(1, 0, "Error : %s",
 499                                     archive_error_string(bsdtar->matching));
 500                         break;
 501                 case OPTION_NEWER_CTIME_THAN:
 502                         if (archive_match_include_file_time(bsdtar->matching,
 503                             ARCHIVE_MATCH_CTIME | ARCHIVE_MATCH_NEWER,
 504                             bsdtar->argument) != ARCHIVE_OK)
 505                                 lafe_errc(1, 0, "Error : %s",
 506                                     archive_error_string(bsdtar->matching));
 507                         break;
 508                 case OPTION_NEWER_MTIME: /* GNU tar */
 509                         if (archive_match_include_date(bsdtar->matching,
 510                             ARCHIVE_MATCH_MTIME | ARCHIVE_MATCH_NEWER,
 511                             bsdtar->argument) != ARCHIVE_OK)
 512                                 lafe_errc(1, 0, "Error : %s",
 513                                     archive_error_string(bsdtar->matching));
 514                         break;
 515                 case OPTION_NEWER_MTIME_THAN:
 516                         if (archive_match_include_file_time(bsdtar->matching,
 517                             ARCHIVE_MATCH_MTIME | ARCHIVE_MATCH_NEWER,
 518                             bsdtar->argument) != ARCHIVE_OK)
 519                                 lafe_errc(1, 0, "Error : %s",
 520                                     archive_error_string(bsdtar->matching));
 521                         break;
 522                 case OPTION_NODUMP: /* star */
 523                         bsdtar->readdisk_flags |= ARCHIVE_READDISK_HONOR_NODUMP;
 524                         break;
 525                 case OPTION_NOPRESERVE_HFS_COMPRESSION:
 526                         /* Mac OS X v10.6 or later */
 527                         bsdtar->extract_flags |=
 528                             ARCHIVE_EXTRACT_NO_HFS_COMPRESSION;
 529                         break;
 530                 case OPTION_NO_ACLS: /* GNU tar */
 531                         bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_ACL;
 532                         bsdtar->readdisk_flags |= ARCHIVE_READDISK_NO_ACL;
 533                         bsdtar->flags |= OPTFLAG_NO_ACLS;
 534                         break;
 535                 case OPTION_NO_FFLAGS:
 536                         bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_FFLAGS;
 537                         bsdtar->readdisk_flags |= ARCHIVE_READDISK_NO_FFLAGS;
 538                         bsdtar->flags |= OPTFLAG_NO_FFLAGS;
 539                         break;
 540                 case OPTION_NO_MAC_METADATA: /* Mac OS X */
 541                         bsdtar->readdisk_flags &= ~ARCHIVE_READDISK_MAC_COPYFILE;
 542                         bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_MAC_METADATA;
 543                         bsdtar->flags |= OPTFLAG_NO_MAC_METADATA;
 544                         break;
 545                 case OPTION_NO_SAME_OWNER: /* GNU tar */
 546                         bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_OWNER;
 547                         break;
 548                 case OPTION_NO_SAME_PERMISSIONS: /* GNU tar */
 549                         bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_PERM;
 550                         bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_ACL;
 551                         bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_XATTR;
 552                         bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_FFLAGS;
 553                         bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_MAC_METADATA;
 554                         break;
 555                 case OPTION_NO_XATTRS: /* GNU tar */
 556                         bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_XATTR;
 557                         bsdtar->readdisk_flags |= ARCHIVE_READDISK_NO_XATTR;
 558                         bsdtar->flags |= OPTFLAG_NO_XATTRS;
 559                         break;
 560                 case OPTION_NULL: /* GNU tar */
 561                         bsdtar->flags |= OPTFLAG_NULL;
 562                         break;
 563                 case OPTION_NUMERIC_OWNER: /* GNU tar */
 564                         bsdtar->uname = "";
 565                         bsdtar->gname = "";
 566                         bsdtar->flags |= OPTFLAG_NUMERIC_OWNER;
 567                         break;
 568                 case 'O': /* GNU tar */
 569                         bsdtar->flags |= OPTFLAG_STDOUT;
 570                         break;
 571                 case 'o': /* SUSv2 and GNU conflict here, but not fatally */
 572                         bsdtar->flags |= OPTFLAG_O;
 573                         break;
 574                 /*
 575                  * Selecting files by time:
 576                  *    --older-?time='date' Only files older than 'date'
 577                  *    --older-?time-than='file' Only files older than time
 578                  *         on specified file
 579                  */
 580                 case OPTION_OLDER_CTIME:
 581                         if (archive_match_include_date(bsdtar->matching,
 582                             ARCHIVE_MATCH_CTIME | ARCHIVE_MATCH_OLDER,
 583                             bsdtar->argument) != ARCHIVE_OK)
 584                                 lafe_errc(1, 0, "Error : %s",
 585                                     archive_error_string(bsdtar->matching));
 586                         break;
 587                 case OPTION_OLDER_CTIME_THAN:
 588                         if (archive_match_include_file_time(bsdtar->matching,
 589                             ARCHIVE_MATCH_CTIME | ARCHIVE_MATCH_OLDER,
 590                             bsdtar->argument) != ARCHIVE_OK)
 591                                 lafe_errc(1, 0, "Error : %s",
 592                                     archive_error_string(bsdtar->matching));
 593                         break;
 594                 case OPTION_OLDER_MTIME:
 595                         if (archive_match_include_date(bsdtar->matching,
 596                             ARCHIVE_MATCH_MTIME | ARCHIVE_MATCH_OLDER,
 597                             bsdtar->argument) != ARCHIVE_OK)
 598                                 lafe_errc(1, 0, "Error : %s",
 599                                     archive_error_string(bsdtar->matching));
 600                         break;
 601                 case OPTION_OLDER_MTIME_THAN:
 602                         if (archive_match_include_file_time(bsdtar->matching,
 603                             ARCHIVE_MATCH_MTIME | ARCHIVE_MATCH_OLDER,
 604                             bsdtar->argument) != ARCHIVE_OK)
 605                                 lafe_errc(1, 0, "Error : %s",
 606                                     archive_error_string(bsdtar->matching));
 607                         break;
 608                 case OPTION_ONE_FILE_SYSTEM: /* GNU tar */
 609                         bsdtar->readdisk_flags |=
 610                             ARCHIVE_READDISK_NO_TRAVERSE_MOUNTS;
 611                         break;
 612                 case OPTION_OPTIONS:
 613                         bsdtar->option_options = bsdtar->argument;
 614                         break;
 615 #if 0
 616                 /*
 617                  * The common BSD -P option is not necessary, since
 618                  * our default is to archive symlinks, not follow
 619                  * them.  This is convenient, as -P conflicts with GNU
 620                  * tar anyway.
 621                  */
 622                 case 'P': /* BSD convention */
 623                         /* Default behavior, no option necessary. */
 624                         break;
 625 #endif
 626                 case 'P': /* GNU tar */
 627                         bsdtar->extract_flags &= ~SECURITY;
 628                         bsdtar->flags |= OPTFLAG_ABSOLUTE_PATHS;
 629                         break;
 630                 case 'p': /* GNU tar, star */
 631                         bsdtar->extract_flags |= ARCHIVE_EXTRACT_PERM;
 632                         bsdtar->extract_flags |= ARCHIVE_EXTRACT_ACL;
 633                         bsdtar->extract_flags |= ARCHIVE_EXTRACT_XATTR;
 634                         bsdtar->extract_flags |= ARCHIVE_EXTRACT_FFLAGS;
 635                         bsdtar->extract_flags |= ARCHIVE_EXTRACT_MAC_METADATA;
 636                         break;
 637                 case OPTION_PASSPHRASE:
 638                         bsdtar->passphrase = bsdtar->argument;
 639                         break;
 640                 case OPTION_POSIX: /* GNU tar */
 641                         cset_set_format(bsdtar->cset, "pax");
 642                         break;
 643                 case 'q': /* FreeBSD GNU tar --fast-read, NetBSD -q */
 644                         bsdtar->flags |= OPTFLAG_FAST_READ;
 645                         break;
 646                 case 'r': /* SUSv2 */
 647                         set_mode(bsdtar, opt);
 648                         break;
 649                 case 'S': /* NetBSD pax-as-tar */
 650                         bsdtar->extract_flags |= ARCHIVE_EXTRACT_SPARSE;
 651                         break;
 652                 case 's': /* NetBSD pax-as-tar */
 653 #if defined(HAVE_REGEX_H) || defined(HAVE_PCREPOSIX_H)
 654                         add_substitution(bsdtar, bsdtar->argument);
 655 #else
 656                         lafe_warnc(0,
 657                             "-s is not supported by this version of bsdtar");
 658                         usage();
 659 #endif
 660                         break;
 661                 case OPTION_SAME_OWNER: /* GNU tar */
 662                         bsdtar->extract_flags |= ARCHIVE_EXTRACT_OWNER;
 663                         break;
 664                 case OPTION_STRIP_COMPONENTS: /* GNU tar 1.15 */
 665                         errno = 0;
 666                         tptr = NULL;
 667                         t = (int)strtol(bsdtar->argument, &tptr, 10);
 668                         if (errno || t < 0 || *(bsdtar->argument) == '\0' ||
 669                             tptr == NULL || *tptr != '\0') {
 670                                 lafe_errc(1, 0, "Invalid argument to "
 671                                     "--strip-components");
 672                         }
 673                         bsdtar->strip_components = t;
 674                         break;
 675                 case 'T': /* GNU tar */
 676                         bsdtar->names_from_file = bsdtar->argument;
 677                         break;
 678                 case 't': /* SUSv2 */
 679                         set_mode(bsdtar, opt);
 680                         bsdtar->verbose++;
 681                         break;
 682                 case OPTION_TOTALS: /* GNU tar */
 683                         bsdtar->flags |= OPTFLAG_TOTALS;
 684                         break;
 685                 case 'U': /* GNU tar */
 686                         bsdtar->extract_flags |= ARCHIVE_EXTRACT_UNLINK;
 687                         bsdtar->flags |= OPTFLAG_UNLINK_FIRST;
 688                         break;
 689                 case 'u': /* SUSv2 */
 690                         set_mode(bsdtar, opt);
 691                         break;
 692                 case OPTION_UID: /* cpio */
 693                         errno = 0;
 694                         tptr = NULL;
 695                         t = (int)strtol(bsdtar->argument, &tptr, 10);
 696                         if (errno || t < 0 || *(bsdtar->argument) == '\0' ||
 697                             tptr == NULL || *tptr != '\0') {
 698                                 lafe_errc(1, 0, "Invalid argument to --uid");
 699                         }
 700                         bsdtar->uid = t;
 701                         break;
 702                 case OPTION_UNAME: /* cpio */
 703                         bsdtar->uname = bsdtar->argument;
 704                         break;
 705                 case OPTION_UUENCODE:
 706                         if (compression2 != '\0')
 707                                 lafe_errc(1, 0,
 708                                     "Can't specify both --uuencode and "
 709                                     "--b64encode");
 710                         compression2 = opt;
 711                         compression2_name = "uuencode";
 712                         break;
 713                 case 'v': /* SUSv2 */
 714                         bsdtar->verbose++;
 715                         break;
 716                 case OPTION_VERSION: /* GNU convention */
 717                         version();
 718                         break;
 719 #if 0
 720                 /*
 721                  * The -W longopt feature is handled inside of
 722                  * bsdtar_getopt(), so -W is not available here.
 723                  */
 724                 case 'W': /* Obscure GNU convention. */
 725                         break;
 726 #endif
 727                 case 'w': /* SUSv2 */
 728                         bsdtar->flags |= OPTFLAG_INTERACTIVE;
 729                         break;
 730                 case 'X': /* GNU tar */
 731                         if (archive_match_exclude_pattern_from_file(
 732                             bsdtar->matching, bsdtar->argument, 0)
 733                             != ARCHIVE_OK)
 734                                 lafe_errc(1, 0, "Error : %s",
 735                                     archive_error_string(bsdtar->matching));
 736                         break;
 737                 case 'x': /* SUSv2 */
 738                         set_mode(bsdtar, opt);
 739                         break;
 740                 case OPTION_XATTRS: /* GNU tar */
 741                         bsdtar->extract_flags |= ARCHIVE_EXTRACT_XATTR;
 742                         bsdtar->readdisk_flags &= ~ARCHIVE_READDISK_NO_XATTR;
 743                         bsdtar->flags |= OPTFLAG_XATTRS;
 744                         break;
 745                 case 'y': /* FreeBSD version of GNU tar */
 746                         if (compression != '\0')
 747                                 lafe_errc(1, 0,
 748                                     "Can't specify both -%c and -%c", opt,
 749                                     compression);
 750                         compression = opt;
 751                         compression_name = "bzip2";
 752                         break;
 753                 case 'Z': /* GNU tar */
 754                         if (compression != '\0')
 755                                 lafe_errc(1, 0,
 756                                     "Can't specify both -%c and -%c", opt,
 757                                     compression);
 758                         compression = opt;
 759                         compression_name = "compress";
 760                         break;
 761                 case 'z': /* GNU tar, star, many others */
 762                         if (compression != '\0')
 763                                 lafe_errc(1, 0,
 764                                     "Can't specify both -%c and -%c", opt,
 765                                     compression);
 766                         compression = opt;
 767                         compression_name = "gzip";
 768                         break;
 769                 case OPTION_USE_COMPRESS_PROGRAM:
 770                         compress_program = bsdtar->argument;
 771                         break;
 772                 default:
 773                         usage();
 774                 }
 775         }
 776
 777         /*
 778          * Sanity-check options.
 779          */
 780
 781         /* If no "real" mode was specified, treat -h as --help. */
 782         if ((bsdtar->mode == '\0') && possible_help_request) {
 783                 long_help();
 784                 exit(0);
 785         }
 786
 787         /* Otherwise, a mode is required. */
 788         if (bsdtar->mode == '\0')
 789                 lafe_errc(1, 0,
 790                     "Must specify one of -c, -r, -t, -u, -x");
 791
 792         /* Check boolean options only permitted in certain modes. */
 793         if (bsdtar->flags & OPTFLAG_AUTO_COMPRESS)
 794                 only_mode(bsdtar, "-a", "c");
 795         if (bsdtar->readdisk_flags & ARCHIVE_READDISK_NO_TRAVERSE_MOUNTS)
 796                 only_mode(bsdtar, "--one-file-system", "cru");
 797         if (bsdtar->flags & OPTFLAG_FAST_READ)
 798                 only_mode(bsdtar, "--fast-read", "xt");
 799         if (bsdtar->extract_flags & ARCHIVE_EXTRACT_HFS_COMPRESSION_FORCED)
 800                 only_mode(bsdtar, "--hfsCompression", "x");
 801         if (bsdtar->extract_flags & ARCHIVE_EXTRACT_NO_HFS_COMPRESSION)
 802                 only_mode(bsdtar, "--nopreserveHFSCompression", "x");
 803         if (bsdtar->readdisk_flags & ARCHIVE_READDISK_HONOR_NODUMP)
 804                 only_mode(bsdtar, "--nodump", "cru");
 805         if (bsdtar->flags & OPTFLAG_ACLS)
 806                 only_mode(bsdtar, "--acls", "crux");
 807         if (bsdtar->flags & OPTFLAG_NO_ACLS)
 808                 only_mode(bsdtar, "--no-acls", "crux");
 809         if (bsdtar->flags & OPTFLAG_XATTRS)
 810                 only_mode(bsdtar, "--xattrs", "crux");
 811         if (bsdtar->flags & OPTFLAG_NO_XATTRS)
 812                 only_mode(bsdtar, "--no-xattrs", "crux");
 813         if (bsdtar->flags & OPTFLAG_FFLAGS)
 814                 only_mode(bsdtar, "--fflags", "crux");
 815         if (bsdtar->flags & OPTFLAG_NO_FFLAGS)
 816                 only_mode(bsdtar, "--no-fflags", "crux");
 817         if (bsdtar->flags & OPTFLAG_MAC_METADATA)
 818                 only_mode(bsdtar, "--mac-metadata", "crux");
 819         if (bsdtar->flags & OPTFLAG_NO_MAC_METADATA)
 820                 only_mode(bsdtar, "--no-mac-metadata", "crux");
 821         if (bsdtar->flags & OPTFLAG_O) {
 822                 switch (bsdtar->mode) {
 823                 case 'c':
 824                         /*
 825                          * In GNU tar, -o means "old format."  The
 826                          * "ustar" format is the closest thing
 827                          * supported by libarchive.
 828                          */
 829                         cset_set_format(bsdtar->cset, "ustar");
 830                         /* TODO: bsdtar->create_format = "v7"; */
 831                         break;
 832                 case 'x':
 833                         /* POSIX-compatible behavior. */
 834                         bsdtar->flags |= OPTFLAG_NO_OWNER;
 835                         bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_OWNER;
 836                         break;
 837                 default:
 838                         only_mode(bsdtar, "-o", "xc");
 839                         break;
 840                 }
 841         }
 842         if (bsdtar->flags & OPTFLAG_STDOUT)
 843                 only_mode(bsdtar, "-O", "xt");
 844         if (bsdtar->flags & OPTFLAG_UNLINK_FIRST)
 845                 only_mode(bsdtar, "-U", "x");
 846         if (bsdtar->flags & OPTFLAG_WARN_LINKS)
 847                 only_mode(bsdtar, "--check-links", "cr");
 848
 849         if ((bsdtar->flags & OPTFLAG_AUTO_COMPRESS) &&
 850             cset_auto_compress(bsdtar->cset, bsdtar->filename)) {
 851                 /* Ignore specified compressions if auto-compress works. */
 852                 compression = '\0';
 853                 compression2 = '\0';
 854         }
 855         /* Check other parameters only permitted in certain modes. */
 856         if (compress_program != NULL) {
 857                 only_mode(bsdtar, "--use-compress-program", "cxt");
 858                 cset_add_filter_program(bsdtar->cset, compress_program);
 859                 /* Ignore specified compressions. */
 860                 compression = '\0';
 861                 compression2 = '\0';
 862         }
 863         if (compression != '\0') {
 864                 switch (compression) {
 865                 case 'J': case 'j': case 'y': case 'Z': case 'z':
 866                         strcpy(buff, "-?");
 867                         buff[1] = compression;
 868                         break;
 869                 default:
 870                         strcpy(buff, "--");
 871                         strcat(buff, compression_name);
 872                         break;
 873                 }
 874                 only_mode(bsdtar, buff, "cxt");
 875                 cset_add_filter(bsdtar->cset, compression_name);
 876         }
 877         if (compression2 != '\0') {
 878                 strcpy(buff, "--");
 879                 strcat(buff, compression2_name);
 880                 only_mode(bsdtar, buff, "cxt");
 881                 cset_add_filter(bsdtar->cset, compression2_name);
 882         }
 883         if (cset_get_format(bsdtar->cset) != NULL)
 884                 only_mode(bsdtar, "--format", "cru");
 885         if (bsdtar->symlink_mode != '\0') {
 886                 strcpy(buff, "-?");
 887                 buff[1] = bsdtar->symlink_mode;
 888                 only_mode(bsdtar, buff, "cru");
 889         }
 890
 891         /*
 892          * When creating an archive from a directory tree, the directory
 893          * walking code will already avoid entering directories when
 894          * recursive inclusion of directory content is disabled, therefore
 895          * changing the matching behavior has no effect for creation modes.
 896          * It is relevant for extraction or listing.
 897          */
 898         archive_match_set_inclusion_recursion(bsdtar->matching,
 899                                               !(bsdtar->flags & OPTFLAG_NO_SUBDIRS));
 900
 901         /* Filename "-" implies stdio. */
 902         if (strcmp(bsdtar->filename, "-") == 0)
 903                 bsdtar->filename = NULL;
 904
 905         switch(bsdtar->mode) {
 906         case 'c':
 907                 tar_mode_c(bsdtar);
 908                 break;
 909         case 'r':
 910                 tar_mode_r(bsdtar);
 911                 break;
 912         case 't':
 913                 tar_mode_t(bsdtar);
 914                 break;
 915         case 'u':
 916                 tar_mode_u(bsdtar);
 917                 break;
 918         case 'x':
 919                 tar_mode_x(bsdtar);
 920                 break;
 921         }
 922
 923         archive_match_free(bsdtar->matching);
 924 #if defined(HAVE_REGEX_H) || defined(HAVE_PCREPOSIX_H)
 925         cleanup_substitution(bsdtar);
 926 #endif
 927         cset_free(bsdtar->cset);
 928         passphrase_free(bsdtar->ppbuff);
 929
 930         if (bsdtar->return_value != 0)
 931                 lafe_warnc(0,
 932                     "Error exit delayed from previous errors.");
 933         return (bsdtar->return_value);
 934 }
 935
 936 static void
 937 set_mode(struct bsdtar *bsdtar, char opt)
 938 {
 939         if (bsdtar->mode != '\0' && bsdtar->mode != opt)
 940                 lafe_errc(1, 0,
 941                     "Can't specify both -%c and -%c", opt, bsdtar->mode);
 942         bsdtar->mode = opt;
 943 }
 944
 945 /*
 946  * Verify that the mode is correct.
 947  */
 948 static void
 949 only_mode(struct bsdtar *bsdtar, const char *opt, const char *valid_modes)
 950 {
 951         if (strchr(valid_modes, bsdtar->mode) == NULL)
 952                 lafe_errc(1, 0,
 953                     "Option %s is not permitted in mode -%c",
 954                     opt, bsdtar->mode);
 955 }
 956
 957
 958 void
 959 usage(void)
 960 {
 961         const char      *p;
 962
 963         p = lafe_getprogname();
 964
 965         fprintf(stderr, "Usage:\n");
 966         fprintf(stderr, "  List:    %s -tf <archive-filename>\n", p);
 967         fprintf(stderr, "  Extract: %s -xf <archive-filename>\n", p);
 968         fprintf(stderr, "  Create:  %s -cf <archive-filename> [filenames...]\n", p);
 969         fprintf(stderr, "  Help:    %s --help\n", p);
 970         exit(1);
 971 }
 972
 973 static void
 974 version(void)
 975 {
 976         printf("bsdtar %s - %s \n",
 977             BSDTAR_VERSION_STRING,
 978             archive_version_details());
 979         exit(0);
 980 }
 981
 982 static const char *long_help_msg =
 983         "First option must be a mode specifier:\n"
 984         "  -c Create  -r Add/Replace  -t List  -u Update  -x Extract\n"
 985         "Common Options:\n"
 986         "  -b #  Use # 512-byte records per I/O block\n"
 987         "  -f <filename>  Location of archive (default " _PATH_DEFTAPE ")\n"
 988         "  -v    Verbose\n"
 989         "  -w    Interactive\n"
 990         "Create: %p -c [options] [<file> | <dir> | @<archive> | -C <dir> ]\n"
 991         "  <file>, <dir>  add these items to archive\n"
 992         "  -z, -j, -J, --lzma  Compress archive with gzip/bzip2/xz/lzma\n"
 993         "  --format {ustar|pax|cpio|shar}  Select archive format\n"
 994         "  --exclude <pattern>  Skip files that match pattern\n"
 995         "  -C <dir>  Change to <dir> before processing remaining files\n"
 996         "  @<archive>  Add entries from <archive> to output\n"
 997         "List: %p -t [options] [<patterns>]\n"
 998         "  <patterns>  If specified, list only entries that match\n"
 999         "Extract: %p -x [options] [<patterns>]\n"
1000         "  <patterns>  If specified, extract only entries that match\n"
1001         "  -k    Keep (don't overwrite) existing files\n"
1002         "  -m    Don't restore modification times\n"
1003         "  -O    Write entries to stdout, don't restore to disk\n"
1004         "  -p    Restore permissions (including ACLs, owner, file flags)\n";
1005
1006
1007 /*
1008  * Note that the word 'bsdtar' will always appear in the first line
1009  * of output.
1010  *
1011  * In particular, /bin/sh scripts that need to test for the presence
1012  * of bsdtar can use the following template:
1013  *
1014  * if (tar --help 2>&1 | grep bsdtar >/dev/null 2>&1 ) then \
1015  *          echo bsdtar; else echo not bsdtar; fi
1016  */
1017 static void
1018 long_help(void)
1019 {
1020         const char      *prog;
1021         const char      *p;
1022
1023         prog = lafe_getprogname();
1024
1025         fflush(stderr);
1026
1027         p = (strcmp(prog,"bsdtar") != 0) ? "(bsdtar)" : "";
1028         printf("%s%s: manipulate archive files\n", prog, p);
1029
1030         for (p = long_help_msg; *p != '\0'; p++) {
1031                 if (*p == '%') {
1032                         if (p[1] == 'p') {
1033                                 fputs(prog, stdout);
1034                                 p++;
1035                         } else
1036                                 putchar('%');
1037                 } else
1038                         putchar(*p);
1039         }
1040         version();
1041 }