2 * Copyright (c) 2003-2007 Tim Kientzle
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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.
26 #include "bsdtar_platform.h"
27 __FBSDID("$FreeBSD$");
29 #ifdef HAVE_SYS_PARAM_H
30 #include <sys/param.h>
32 #ifdef HAVE_SYS_STAT_H
41 #ifdef HAVE_GETOPT_LONG
51 #define required_argument 1
53 #ifdef HAVE_LANGINFO_H
90 * Per POSIX.1-1988, tar defaults to reading/writing archives to/from
91 * the default tape device for the system. Pick something reasonable here.
94 #define _PATH_DEFTAPE "/dev/st0"
98 #define _PATH_DEFTAPE "/dev/tape"
101 /* External function to parse a date/time string (from getdate.y) */
102 time_t get_date(const char *);
104 static int bsdtar_getopt(struct bsdtar *, const char *optstring,
105 const struct option **poption);
106 static void long_help(struct bsdtar *);
107 static void only_mode(struct bsdtar *, const char *opt,
109 static char ** rewrite_argv(struct bsdtar *,
110 int *argc, char ** src_argv,
111 const char *optstring);
112 static void set_mode(struct bsdtar *, char opt);
113 static void version(void);
116 * The leading '+' here forces the GNU version of getopt() (as well as
117 * both the GNU and BSD versions of getopt_long) to stop at the first
118 * non-option. Otherwise, GNU getopt() permutes the arguments and
119 * screws up -C processing.
121 static const char *tar_opts = "+Bb:C:cf:HhI:jkLlmnOoPpqrts:ST:UuvW:wX:xyZz";
124 * Most of these long options are deliberately not documented. They
125 * are provided only to make life easier for people who also use GNU tar.
126 * The only long options documented in the manual page are the ones
127 * with no corresponding short option, such as --exclude, --nodump,
130 * On systems that lack getopt_long, long options can be specified
131 * using -W longopt and -W longopt=value, e.g. "-W nodump" is the same
132 * as "--nodump" and "-W exclude=pattern" is the same as "--exclude
133 * pattern". This does not rely the GNU getopt() "W;" extension, so
134 * should work correctly on any system with a POSIX-compliant getopt().
137 /* Fake short equivalents for long options that otherwise lack them. */
139 OPTION_CHECK_LINKS = 1,
145 OPTION_KEEP_NEWER_FILES,
147 OPTION_NEWER_CTIME_THAN,
149 OPTION_NEWER_MTIME_THAN,
151 OPTION_NO_SAME_OWNER,
152 OPTION_NO_SAME_PERMISSIONS,
154 OPTION_NUMERIC_OWNER,
155 OPTION_ONE_FILE_SYSTEM,
157 OPTION_STRIP_COMPONENTS,
159 OPTION_USE_COMPRESS_PROGRAM,
164 * If you add anything, be very careful to keep this list properly
165 * sorted, as the -W logic relies on it.
167 static const struct option tar_longopts[] = {
168 { "absolute-paths", no_argument, NULL, 'P' },
169 { "append", no_argument, NULL, 'r' },
170 { "block-size", required_argument, NULL, 'b' },
171 { "bunzip2", no_argument, NULL, 'j' },
172 { "bzip", no_argument, NULL, 'j' },
173 { "bzip2", no_argument, NULL, 'j' },
174 { "cd", required_argument, NULL, 'C' },
175 { "check-links", no_argument, NULL, OPTION_CHECK_LINKS },
176 { "chroot", no_argument, NULL, OPTION_CHROOT },
177 { "compress", no_argument, NULL, 'Z' },
178 { "confirmation", no_argument, NULL, 'w' },
179 { "create", no_argument, NULL, 'c' },
180 { "dereference", no_argument, NULL, 'L' },
181 { "directory", required_argument, NULL, 'C' },
182 { "exclude", required_argument, NULL, OPTION_EXCLUDE },
183 { "exclude-from", required_argument, NULL, 'X' },
184 { "extract", no_argument, NULL, 'x' },
185 { "fast-read", no_argument, NULL, 'q' },
186 { "file", required_argument, NULL, 'f' },
187 { "files-from", required_argument, NULL, 'T' },
188 { "format", required_argument, NULL, OPTION_FORMAT },
189 { "gunzip", no_argument, NULL, 'z' },
190 { "gzip", no_argument, NULL, 'z' },
191 { "help", no_argument, NULL, OPTION_HELP },
192 { "include", required_argument, NULL, OPTION_INCLUDE },
193 { "interactive", no_argument, NULL, 'w' },
194 { "insecure", no_argument, NULL, 'P' },
195 { "keep-newer-files", no_argument, NULL, OPTION_KEEP_NEWER_FILES },
196 { "keep-old-files", no_argument, NULL, 'k' },
197 { "list", no_argument, NULL, 't' },
198 { "modification-time", no_argument, NULL, 'm' },
199 { "newer", required_argument, NULL, OPTION_NEWER_CTIME },
200 { "newer-ctime", required_argument, NULL, OPTION_NEWER_CTIME },
201 { "newer-ctime-than", required_argument, NULL, OPTION_NEWER_CTIME_THAN },
202 { "newer-mtime", required_argument, NULL, OPTION_NEWER_MTIME },
203 { "newer-mtime-than", required_argument, NULL, OPTION_NEWER_MTIME_THAN },
204 { "newer-than", required_argument, NULL, OPTION_NEWER_CTIME_THAN },
205 { "nodump", no_argument, NULL, OPTION_NODUMP },
206 { "norecurse", no_argument, NULL, 'n' },
207 { "no-recursion", no_argument, NULL, 'n' },
208 { "no-same-owner", no_argument, NULL, OPTION_NO_SAME_OWNER },
209 { "no-same-permissions",no_argument, NULL, OPTION_NO_SAME_PERMISSIONS },
210 { "null", no_argument, NULL, OPTION_NULL },
211 { "numeric-owner", no_argument, NULL, OPTION_NUMERIC_OWNER },
212 { "one-file-system", no_argument, NULL, OPTION_ONE_FILE_SYSTEM },
213 { "posix", no_argument, NULL, OPTION_POSIX },
214 { "preserve-permissions", no_argument, NULL, 'p' },
215 { "read-full-blocks", no_argument, NULL, 'B' },
216 { "same-permissions", no_argument, NULL, 'p' },
217 { "strip-components", required_argument, NULL, OPTION_STRIP_COMPONENTS },
218 { "to-stdout", no_argument, NULL, 'O' },
219 { "totals", no_argument, NULL, OPTION_TOTALS },
220 { "uncompress", no_argument, NULL, 'Z' },
221 { "unlink", no_argument, NULL, 'U' },
222 { "unlink-first", no_argument, NULL, 'U' },
223 { "update", no_argument, NULL, 'u' },
224 { "use-compress-program",
225 required_argument, NULL, OPTION_USE_COMPRESS_PROGRAM },
226 { "verbose", no_argument, NULL, 'v' },
227 { "version", no_argument, NULL, OPTION_VERSION },
231 /* A basic set of security flags to request from libarchive. */
233 (ARCHIVE_EXTRACT_SECURE_SYMLINKS \
234 | ARCHIVE_EXTRACT_SECURE_NODOTDOT)
237 main(int argc, char **argv)
239 struct bsdtar *bsdtar, bsdtar_storage;
240 const struct option *option;
243 char possible_help_request;
247 * Use a pointer for consistency, but stack-allocated storage
248 * for ease of cleanup.
250 bsdtar = &bsdtar_storage;
251 memset(bsdtar, 0, sizeof(*bsdtar));
252 bsdtar->fd = -1; /* Mark as "unused" */
255 /* Need bsdtar->progname before calling bsdtar_warnc. */
257 bsdtar->progname = "bsdtar";
259 bsdtar->progname = strrchr(*argv, '/');
260 if (bsdtar->progname != NULL)
263 bsdtar->progname = *argv;
266 if (setlocale(LC_ALL, "") == NULL)
267 bsdtar_warnc(bsdtar, 0, "Failed to set default locale");
268 #if defined(HAVE_NL_LANGINFO) && defined(HAVE_D_MD_ORDER)
269 bsdtar->day_first = (*nl_langinfo(D_MD_ORDER) == 'd');
271 possible_help_request = 0;
273 /* Look up uid of current user for future reference */
274 bsdtar->user_uid = geteuid();
276 /* Default: open tape drive. */
277 bsdtar->filename = getenv("TAPE");
278 if (bsdtar->filename == NULL)
279 bsdtar->filename = _PATH_DEFTAPE;
281 /* Default: preserve mod time on extract */
282 bsdtar->extract_flags = ARCHIVE_EXTRACT_TIME;
284 /* Default: Perform basic security checks. */
285 bsdtar->extract_flags |= SECURITY;
287 /* Defaults for root user: */
288 if (bsdtar->user_uid == 0) {
290 bsdtar->extract_flags |= ARCHIVE_EXTRACT_OWNER;
292 bsdtar->extract_flags |= ARCHIVE_EXTRACT_PERM;
293 bsdtar->extract_flags |= ARCHIVE_EXTRACT_ACL;
294 bsdtar->extract_flags |= ARCHIVE_EXTRACT_XATTR;
295 bsdtar->extract_flags |= ARCHIVE_EXTRACT_FFLAGS;
298 /* Rewrite traditional-style tar arguments, if used. */
299 argv = rewrite_argv(bsdtar, &argc, argv, tar_opts);
304 /* Process all remaining arguments now. */
306 * Comments following each option indicate where that option
307 * originated: SUSv2, POSIX, GNU tar, star, etc. If there's
308 * no such comment, then I don't know of anyone else who
309 * implements that option.
311 while ((opt = bsdtar_getopt(bsdtar, tar_opts, &option)) != -1) {
313 case 'B': /* GNU tar */
314 /* libarchive doesn't need this; just ignore it. */
316 case 'b': /* SUSv2 */
318 if (t <= 0 || t > 1024)
319 bsdtar_errc(bsdtar, 1, 0,
320 "Argument to -b is out of range (1..1024)");
321 bsdtar->bytes_per_block = 512 * t;
323 case 'C': /* GNU tar */
324 set_chdir(bsdtar, optarg);
326 case 'c': /* SUSv2 */
327 set_mode(bsdtar, opt);
329 case OPTION_CHECK_LINKS: /* GNU tar */
330 bsdtar->option_warn_links = 1;
332 case OPTION_CHROOT: /* NetBSD */
333 bsdtar->option_chroot = 1;
335 case OPTION_EXCLUDE: /* GNU tar */
336 if (exclude(bsdtar, optarg))
337 bsdtar_errc(bsdtar, 1, 0,
338 "Couldn't exclude %s\n", optarg);
340 case OPTION_FORMAT: /* GNU tar, others */
341 bsdtar->create_format = optarg;
343 case 'f': /* SUSv2 */
344 bsdtar->filename = optarg;
345 if (strcmp(bsdtar->filename, "-") == 0)
346 bsdtar->filename = NULL;
348 case 'H': /* BSD convention */
349 bsdtar->symlink_mode = 'H';
351 case 'h': /* Linux Standards Base, gtar; synonym for -L */
352 bsdtar->symlink_mode = 'L';
353 /* Hack: -h by itself is the "help" command. */
354 possible_help_request = 1;
356 case OPTION_HELP: /* GNU tar, others */
360 case 'I': /* GNU tar */
362 * TODO: Allow 'names' to come from an archive,
363 * not just a text file. Design a good UI for
364 * allowing names and mode/owner to be read
365 * from an archive, with contents coming from
366 * disk. This can be used to "refresh" an
367 * archive or to design archives with special
368 * permissions without having to create those
369 * permissions on disk.
371 bsdtar->names_from_file = optarg;
375 * Noone else has the @archive extension, so
376 * noone else needs this to filter entries
377 * when transforming archives.
379 if (include(bsdtar, optarg))
380 bsdtar_errc(bsdtar, 1, 0,
381 "Failed to add %s to inclusion list",
384 case 'j': /* GNU tar */
386 if (bsdtar->create_compression != '\0')
387 bsdtar_errc(bsdtar, 1, 0,
388 "Can't specify both -%c and -%c", opt,
389 bsdtar->create_compression);
390 bsdtar->create_compression = opt;
392 bsdtar_warnc(bsdtar, 0, "-j compression not supported by this version of bsdtar");
396 case 'k': /* GNU tar */
397 bsdtar->extract_flags |= ARCHIVE_EXTRACT_NO_OVERWRITE;
399 case OPTION_KEEP_NEWER_FILES: /* GNU tar */
400 bsdtar->extract_flags |= ARCHIVE_EXTRACT_NO_OVERWRITE_NEWER;
402 case 'L': /* BSD convention */
403 bsdtar->symlink_mode = 'L';
405 case 'l': /* SUSv2 and GNU tar beginning with 1.16 */
406 /* GNU tar 1.13 used -l for --one-file-system */
407 bsdtar->option_warn_links = 1;
409 case 'm': /* SUSv2 */
410 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_TIME;
412 case 'n': /* GNU tar */
413 bsdtar->option_no_subdirs = 1;
416 * Selecting files by time:
417 * --newer-?time='date' Only files newer than 'date'
418 * --newer-?time-than='file' Only files newer than time
419 * on specified file (useful for incremental backups)
420 * TODO: Add corresponding "older" options to reverse these.
422 case OPTION_NEWER_CTIME: /* GNU tar */
423 bsdtar->newer_ctime_sec = get_date(optarg);
425 case OPTION_NEWER_CTIME_THAN:
428 if (stat(optarg, &st) != 0)
429 bsdtar_errc(bsdtar, 1, 0,
430 "Can't open file %s", optarg);
431 bsdtar->newer_ctime_sec = st.st_ctime;
432 bsdtar->newer_ctime_nsec =
433 ARCHIVE_STAT_CTIME_NANOS(&st);
436 case OPTION_NEWER_MTIME: /* GNU tar */
437 bsdtar->newer_mtime_sec = get_date(optarg);
439 case OPTION_NEWER_MTIME_THAN:
442 if (stat(optarg, &st) != 0)
443 bsdtar_errc(bsdtar, 1, 0,
444 "Can't open file %s", optarg);
445 bsdtar->newer_mtime_sec = st.st_mtime;
446 bsdtar->newer_mtime_nsec =
447 ARCHIVE_STAT_MTIME_NANOS(&st);
450 case OPTION_NODUMP: /* star */
451 bsdtar->option_honor_nodump = 1;
453 case OPTION_NO_SAME_OWNER: /* GNU tar */
454 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_OWNER;
456 case OPTION_NO_SAME_PERMISSIONS: /* GNU tar */
457 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_PERM;
458 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_ACL;
459 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_XATTR;
460 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_FFLAGS;
462 case OPTION_NULL: /* GNU tar */
463 bsdtar->option_null++;
465 case OPTION_NUMERIC_OWNER: /* GNU tar */
466 bsdtar->option_numeric_owner++;
468 case 'O': /* GNU tar */
469 bsdtar->option_stdout = 1;
471 case 'o': /* SUSv2 and GNU conflict here, but not fatally */
472 option_o = 1; /* Record it and resolve it later. */
474 case OPTION_ONE_FILE_SYSTEM: /* GNU tar */
475 bsdtar->option_dont_traverse_mounts = 1;
479 * The common BSD -P option is not necessary, since
480 * our default is to archive symlinks, not follow
481 * them. This is convenient, as -P conflicts with GNU
484 case 'P': /* BSD convention */
485 /* Default behavior, no option necessary. */
488 case 'P': /* GNU tar */
489 bsdtar->extract_flags &= ~SECURITY;
490 bsdtar->option_absolute_paths = 1;
492 case 'p': /* GNU tar, star */
493 bsdtar->extract_flags |= ARCHIVE_EXTRACT_PERM;
494 bsdtar->extract_flags |= ARCHIVE_EXTRACT_ACL;
495 bsdtar->extract_flags |= ARCHIVE_EXTRACT_XATTR;
496 bsdtar->extract_flags |= ARCHIVE_EXTRACT_FFLAGS;
498 case OPTION_POSIX: /* GNU tar */
499 bsdtar->create_format = "pax";
501 case 'q': /* FreeBSD GNU tar --fast-read, NetBSD -q */
502 bsdtar->option_fast_read = 1;
504 case 'r': /* SUSv2 */
505 set_mode(bsdtar, opt);
507 case 'S': /* NetBSD pax-as-tar */
508 bsdtar->extract_flags |= ARCHIVE_EXTRACT_SPARSE;
510 case 's': /* NetBSD pax-as-tar */
512 add_substitution(bsdtar, optarg);
514 bsdtar_warnc(bsdtar, 0, "-s is not supported by this version of bsdtar");
518 case OPTION_STRIP_COMPONENTS: /* GNU tar 1.15 */
519 bsdtar->strip_components = atoi(optarg);
521 case 'T': /* GNU tar */
522 bsdtar->names_from_file = optarg;
524 case 't': /* SUSv2 */
525 set_mode(bsdtar, opt);
528 case OPTION_TOTALS: /* GNU tar */
529 bsdtar->option_totals++;
531 case 'U': /* GNU tar */
532 bsdtar->extract_flags |= ARCHIVE_EXTRACT_UNLINK;
533 bsdtar->option_unlink_first = 1;
535 case 'u': /* SUSv2 */
536 set_mode(bsdtar, opt);
538 case 'v': /* SUSv2 */
541 case OPTION_VERSION: /* GNU convention */
546 * The -W longopt feature is handled inside of
547 * bsdtar_getop(), so -W is not available here.
549 case 'W': /* Obscure, but useful GNU convention. */
552 case 'w': /* SUSv2 */
553 bsdtar->option_interactive = 1;
555 case 'X': /* GNU tar */
556 if (exclude_from_file(bsdtar, optarg))
557 bsdtar_errc(bsdtar, 1, 0,
558 "failed to process exclusions from file %s",
561 case 'x': /* SUSv2 */
562 set_mode(bsdtar, opt);
564 case 'y': /* FreeBSD version of GNU tar */
566 if (bsdtar->create_compression != '\0')
567 bsdtar_errc(bsdtar, 1, 0,
568 "Can't specify both -%c and -%c", opt,
569 bsdtar->create_compression);
570 bsdtar->create_compression = opt;
572 bsdtar_warnc(bsdtar, 0, "-y compression not supported by this version of bsdtar");
576 case 'Z': /* GNU tar */
577 if (bsdtar->create_compression != '\0')
578 bsdtar_errc(bsdtar, 1, 0,
579 "Can't specify both -%c and -%c", opt,
580 bsdtar->create_compression);
581 bsdtar->create_compression = opt;
583 case 'z': /* GNU tar, star, many others */
585 if (bsdtar->create_compression != '\0')
586 bsdtar_errc(bsdtar, 1, 0,
587 "Can't specify both -%c and -%c", opt,
588 bsdtar->create_compression);
589 bsdtar->create_compression = opt;
591 bsdtar_warnc(bsdtar, 0, "-z compression not supported by this version of bsdtar");
595 case OPTION_USE_COMPRESS_PROGRAM:
596 bsdtar->compress_program = optarg;
604 * Sanity-check options.
607 /* If no "real" mode was specified, treat -h as --help. */
608 if ((bsdtar->mode == '\0') && possible_help_request) {
613 /* Otherwise, a mode is required. */
614 if (bsdtar->mode == '\0')
615 bsdtar_errc(bsdtar, 1, 0,
616 "Must specify one of -c, -r, -t, -u, -x");
618 /* Check boolean options only permitted in certain modes. */
619 if (bsdtar->option_dont_traverse_mounts)
620 only_mode(bsdtar, "--one-file-system", "cru");
621 if (bsdtar->option_fast_read)
622 only_mode(bsdtar, "--fast-read", "xt");
623 if (bsdtar->option_honor_nodump)
624 only_mode(bsdtar, "--nodump", "cru");
626 switch (bsdtar->mode) {
629 * In GNU tar, -o means "old format." The
630 * "ustar" format is the closest thing
631 * supported by libarchive.
633 bsdtar->create_format = "ustar";
634 /* TODO: bsdtar->create_format = "v7"; */
637 /* POSIX-compatible behavior. */
638 bsdtar->option_no_owner = 1;
639 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_OWNER;
642 only_mode(bsdtar, "-o", "xc");
646 if (bsdtar->option_no_subdirs)
647 only_mode(bsdtar, "-n", "cru");
648 if (bsdtar->option_stdout)
649 only_mode(bsdtar, "-O", "xt");
650 if (bsdtar->option_unlink_first)
651 only_mode(bsdtar, "-U", "x");
652 if (bsdtar->option_warn_links)
653 only_mode(bsdtar, "--check-links", "cr");
655 /* Check other parameters only permitted in certain modes. */
656 if (bsdtar->create_compression != '\0') {
658 buff[1] = bsdtar->create_compression;
659 only_mode(bsdtar, buff, "cxt");
661 if (bsdtar->create_format != NULL)
662 only_mode(bsdtar, "--format", "cru");
663 if (bsdtar->symlink_mode != '\0') {
665 buff[1] = bsdtar->symlink_mode;
666 only_mode(bsdtar, buff, "cru");
668 if (bsdtar->strip_components != 0)
669 only_mode(bsdtar, "--strip-components", "xt");
671 bsdtar->argc -= optind;
672 bsdtar->argv += optind;
674 switch(bsdtar->mode) {
692 cleanup_exclusions(bsdtar);
694 cleanup_substitution(bsdtar);
697 if (bsdtar->return_value != 0)
698 bsdtar_warnc(bsdtar, 0,
699 "Error exit delayed from previous errors.");
700 return (bsdtar->return_value);
704 set_mode(struct bsdtar *bsdtar, char opt)
706 if (bsdtar->mode != '\0' && bsdtar->mode != opt)
707 bsdtar_errc(bsdtar, 1, 0,
708 "Can't specify both -%c and -%c", opt, bsdtar->mode);
713 * Verify that the mode is correct.
716 only_mode(struct bsdtar *bsdtar, const char *opt, const char *valid_modes)
718 if (strchr(valid_modes, bsdtar->mode) == NULL)
719 bsdtar_errc(bsdtar, 1, 0,
720 "Option %s is not permitted in mode -%c",
726 * Convert traditional tar arguments into new-style.
728 * tar tvfb file.tar 32 --exclude FOO
729 * will be converted to
730 * tar -t -v -f file.tar -b 32 --exclude FOO
732 * This requires building a new argv array. The initial bundled word
733 * gets expanded into a new string that looks like "-t\0-v\0-f\0-b\0".
734 * The new argv array has pointers into this string intermingled with
735 * pointers to the existing arguments. Arguments are moved to
736 * immediately follow their options.
738 * The optstring argument here is the same one passed to getopt(3).
739 * It is used to determine which option letters have trailing arguments.
742 rewrite_argv(struct bsdtar *bsdtar, int *argc, char **src_argv,
743 const char *optstring)
745 char **new_argv, **dest_argv;
749 if (src_argv[0] == NULL || src_argv[1] == NULL ||
750 src_argv[1][0] == '-' || src_argv[1][0] == '\0')
753 *argc += strlen(src_argv[1]) - 1;
754 new_argv = malloc((*argc + 1) * sizeof(new_argv[0]));
755 if (new_argv == NULL)
756 bsdtar_errc(bsdtar, 1, errno, "No Memory");
758 dest_argv = new_argv;
759 *dest_argv++ = *src_argv++;
761 dest = malloc(strlen(*src_argv) * 3);
763 bsdtar_errc(bsdtar, 1, errno, "No memory");
764 for (src = *src_argv++; *src != '\0'; src++) {
769 /* If option takes an argument, insert that into the list. */
770 for (p = optstring; p != NULL && *p != '\0'; p++) {
773 if (p[1] != ':') /* No arg required, done. */
775 if (*src_argv == NULL) /* No arg available? Error. */
776 bsdtar_errc(bsdtar, 1, 0,
777 "Option %c requires an argument",
779 *dest_argv++ = *src_argv++;
784 /* Copy remaining arguments, including trailing NULL. */
785 while ((*dest_argv++ = *src_argv++) != NULL)
792 usage(struct bsdtar *bsdtar)
796 p = bsdtar->progname;
798 fprintf(stderr, "Usage:\n");
799 fprintf(stderr, " List: %s -tf <archive-filename>\n", p);
800 fprintf(stderr, " Extract: %s -xf <archive-filename>\n", p);
801 fprintf(stderr, " Create: %s -cf <archive-filename> [filenames...]\n", p);
802 #ifdef HAVE_GETOPT_LONG
803 fprintf(stderr, " Help: %s --help\n", p);
805 fprintf(stderr, " Help: %s -h\n", p);
813 printf("bsdtar %s - %s\n",
814 BSDTAR_VERSION_STRING,
819 static const char *long_help_msg =
820 "First option must be a mode specifier:\n"
821 " -c Create -r Add/Replace -t List -u Update -x Extract\n"
823 " -b # Use # 512-byte records per I/O block\n"
824 " -f <filename> Location of archive (default " _PATH_DEFTAPE ")\n"
827 "Create: %p -c [options] [<file> | <dir> | @<archive> | -C <dir> ]\n"
828 " <file>, <dir> add these items to archive\n"
829 " -z, -j Compress archive with gzip/bzip2\n"
830 " --format {ustar|pax|cpio|shar} Select archive format\n"
831 #ifdef HAVE_GETOPT_LONG
832 " --exclude <pattern> Skip files that match pattern\n"
834 " -W exclude=<pattern> Skip files that match pattern\n"
836 " -C <dir> Change to <dir> before processing remaining files\n"
837 " @<archive> Add entries from <archive> to output\n"
838 "List: %p -t [options] [<patterns>]\n"
839 " <patterns> If specified, list only entries that match\n"
840 "Extract: %p -x [options] [<patterns>]\n"
841 " <patterns> If specified, extract only entries that match\n"
842 " -k Keep (don't overwrite) existing files\n"
843 " -m Don't restore modification times\n"
844 " -O Write entries to stdout, don't restore to disk\n"
845 " -p Restore permissions (including ACLs, owner, file flags)\n";
849 * Note that the word 'bsdtar' will always appear in the first line
852 * In particular, /bin/sh scripts that need to test for the presence
853 * of bsdtar can use the following template:
855 * if (tar --help 2>&1 | grep bsdtar >/dev/null 2>&1 ) then \
856 * echo bsdtar; else echo not bsdtar; fi
859 long_help(struct bsdtar *bsdtar)
864 prog = bsdtar->progname;
868 p = (strcmp(prog,"bsdtar") != 0) ? "(bsdtar)" : "";
869 printf("%s%s: manipulate archive files\n", prog, p);
871 for (p = long_help_msg; *p != '\0'; p++) {
885 bsdtar_getopt(struct bsdtar *bsdtar, const char *optstring,
886 const struct option **poption)
889 const struct option *option;
892 size_t option_length;
897 #ifdef HAVE_GETOPT_LONG
898 opt = getopt_long(bsdtar->argc, bsdtar->argv, optstring,
899 tar_longopts, &option_index);
900 if (option_index > -1)
901 *poption = tar_longopts + option_index;
903 opt = getopt(bsdtar->argc, bsdtar->argv, optstring);
906 /* Support long options through -W longopt=value */
909 q = strchr(optarg, '=');
911 option_length = (size_t)(q - p);
914 option_length = strlen(p);
917 option = tar_longopts;
918 while (option->name != NULL &&
919 (strlen(option->name) < option_length ||
920 strncmp(p, option->name, option_length) != 0 )) {
924 if (option->name != NULL) {
928 /* If the first match was exact, we're done. */
929 if (strncmp(p, option->name, strlen(option->name)) == 0) {
930 while (option->name != NULL)
933 /* Check if there's another match. */
935 while (option->name != NULL &&
936 (strlen(option->name) < option_length ||
937 strncmp(p, option->name, option_length) != 0)) {
941 if (option->name != NULL)
942 bsdtar_errc(bsdtar, 1, 0,
943 "Ambiguous option %s "
944 "(matches both %s and %s)",
945 p, (*poption)->name, option->name);
947 if ((*poption)->has_arg == required_argument
949 bsdtar_errc(bsdtar, 1, 0,
950 "Option \"%s\" requires argument", p);
953 /* TODO: Set up a fake 'struct option' for
954 * error reporting... ? ? ? */