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kernel - Implement RLIMIT_RSS, Increase maximum supported swap
[dragonfly.git] / contrib / libarchive / tar / bsdtar.c
blob93bf60a94da84e4aecad2ce6a033aad042ae5d5b
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: src/usr.bin/tar/bsdtar.c,v 1.93 2008/11/08 04:43:24 kientzle Exp $");
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);
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);
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 int
133 main(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 option_a, option_o;
141 char possible_help_request;
142 char buff[16];
143
144 /*
145 * Use a pointer for consistency, but stack-allocated storage
146 * for ease of cleanup.
147 */
148 bsdtar = &bsdtar_storage;
149 memset(bsdtar, 0, sizeof(*bsdtar));
150 bsdtar->fd = -1; /* Mark as "unused" */
151 bsdtar->gid = -1;
152 bsdtar->uid = -1;
153 option_a = option_o = 0;
154 compression = compression2 = '\0';
155 compression_name = compression2_name = NULL;
156 compress_program = NULL;
157
158 #if defined(HAVE_SIGACTION)
159 { /* Set up signal handling. */
160 struct sigaction sa;
161 sa.sa_handler = siginfo_handler;
162 sigemptyset(&sa.sa_mask);
163 sa.sa_flags = 0;
164 #ifdef SIGINFO
165 if (sigaction(SIGINFO, &sa, NULL))
166 lafe_errc(1, errno, "sigaction(SIGINFO) failed");
167 #endif
168 #ifdef SIGUSR1
169 /* ... and treat SIGUSR1 the same way as SIGINFO. */
170 if (sigaction(SIGUSR1, &sa, NULL))
171 lafe_errc(1, errno, "sigaction(SIGUSR1) failed");
172 #endif
173 #ifdef SIGPIPE
174 /* Ignore SIGPIPE signals. */
175 sa.sa_handler = SIG_IGN;
176 sigaction(SIGPIPE, &sa, NULL);
177 #endif
178 }
179 #endif
180
181 /* Set lafe_progname before calling lafe_warnc. */
182 lafe_setprogname(*argv, "bsdtar");
183
184 #if HAVE_SETLOCALE
185 if (setlocale(LC_ALL, "") == NULL)
186 lafe_warnc(0, "Failed to set default locale");
187 #endif
188 #if defined(HAVE_NL_LANGINFO) && defined(HAVE_D_MD_ORDER)
189 bsdtar->day_first = (*nl_langinfo(D_MD_ORDER) == 'd');
190 #endif
191 possible_help_request = 0;
192
193 /* Look up uid of current user for future reference */
194 bsdtar->user_uid = geteuid();
195
196 /* Default: open tape drive. */
197 bsdtar->filename = getenv("TAPE");
198 if (bsdtar->filename == NULL)
199 bsdtar->filename = _PATH_DEFTAPE;
200
201 /* Default block size settings. */
202 bsdtar->bytes_per_block = DEFAULT_BYTES_PER_BLOCK;
203 /* Allow library to default this unless user specifies -b. */
204 bsdtar->bytes_in_last_block = -1;
205
206 /* Default: preserve mod time on extract */
207 bsdtar->extract_flags = ARCHIVE_EXTRACT_TIME;
208
209 /* Default: Perform basic security checks. */
210 bsdtar->extract_flags |= SECURITY;
211
212 #ifndef _WIN32
213 /* On POSIX systems, assume --same-owner and -p when run by
214 * the root user. This doesn't make any sense on Windows. */
215 if (bsdtar->user_uid == 0) {
216 /* --same-owner */
217 bsdtar->extract_flags |= ARCHIVE_EXTRACT_OWNER;
218 /* -p */
219 bsdtar->extract_flags |= ARCHIVE_EXTRACT_PERM;
220 bsdtar->extract_flags |= ARCHIVE_EXTRACT_ACL;
221 bsdtar->extract_flags |= ARCHIVE_EXTRACT_XATTR;
222 bsdtar->extract_flags |= ARCHIVE_EXTRACT_FFLAGS;
223 bsdtar->extract_flags |= ARCHIVE_EXTRACT_MAC_METADATA;
224 }
225 #endif
226
227 /*
228 * Enable Mac OS "copyfile()" extension by default.
229 * This has no effect on other platforms.
230 */
231 bsdtar->readdisk_flags |= ARCHIVE_READDISK_MAC_COPYFILE;
232 #ifdef COPYFILE_DISABLE_VAR
233 if (getenv(COPYFILE_DISABLE_VAR))
234 bsdtar->readdisk_flags &= ~ARCHIVE_READDISK_MAC_COPYFILE;
235 #endif
236 bsdtar->matching = archive_match_new();
237 if (bsdtar->matching == NULL)
238 lafe_errc(1, errno, "Out of memory");
239 bsdtar->cset = cset_new();
240 if (bsdtar->cset == NULL)
241 lafe_errc(1, errno, "Out of memory");
242
243 bsdtar->argv = argv;
244 bsdtar->argc = argc;
245
246 /*
247 * Comments following each option indicate where that option
248 * originated: SUSv2, POSIX, GNU tar, star, etc. If there's
249 * no such comment, then I don't know of anyone else who
250 * implements that option.
251 */
252 while ((opt = bsdtar_getopt(bsdtar)) != -1) {
253 switch (opt) {
254 case 'a': /* GNU tar */
255 option_a = 1; /* Record it and resolve it later. */
256 break;
257 case 'B': /* GNU tar */
258 /* libarchive doesn't need this; just ignore it. */
259 break;
260 case 'b': /* SUSv2 */
261 t = atoi(bsdtar->argument);
262 if (t <= 0 || t > 8192)
263 lafe_errc(1, 0,
264 "Argument to -b is out of range (1..8192)");
265 bsdtar->bytes_per_block = 512 * t;
266 /* Explicit -b forces last block size. */
267 bsdtar->bytes_in_last_block = bsdtar->bytes_per_block;
268 break;
269 case OPTION_B64ENCODE:
270 if (compression2 != '\0')
271 lafe_errc(1, 0,
272 "Can't specify both --uuencode and "
273 "--b64encode");
274 compression2 = opt;
275 compression2_name = "b64encode";
276 break;
277 case 'C': /* GNU tar */
278 if (strlen(bsdtar->argument) == 0)
279 lafe_errc(1, 0,
280 "Meaningless option: -C ''");
281
282 set_chdir(bsdtar, bsdtar->argument);
283 break;
284 case 'c': /* SUSv2 */
285 set_mode(bsdtar, opt);
286 break;
287 case OPTION_CHECK_LINKS: /* GNU tar */
288 bsdtar->option_warn_links = 1;
289 break;
290 case OPTION_CHROOT: /* NetBSD */
291 bsdtar->option_chroot = 1;
292 break;
293 case OPTION_CLEAR_NOCHANGE_FFLAGS:
294 bsdtar->extract_flags |=
295 ARCHIVE_EXTRACT_CLEAR_NOCHANGE_FFLAGS;
296 break;
297 case OPTION_DISABLE_COPYFILE: /* Mac OS X */
298 bsdtar->readdisk_flags &= ~ARCHIVE_READDISK_MAC_COPYFILE;
299 break;
300 case OPTION_EXCLUDE: /* GNU tar */
301 if (archive_match_exclude_pattern(
302 bsdtar->matching, bsdtar->argument) != ARCHIVE_OK)
303 lafe_errc(1, 0,
304 "Couldn't exclude %s\n", bsdtar->argument);
305 break;
306 case OPTION_FORMAT: /* GNU tar, others */
307 cset_set_format(bsdtar->cset, bsdtar->argument);
308 break;
309 case 'f': /* SUSv2 */
310 bsdtar->filename = bsdtar->argument;
311 break;
312 case OPTION_GID: /* cpio */
313 t = atoi(bsdtar->argument);
314 if (t < 0)
315 lafe_errc(1, 0,
316 "Argument to --gid must be positive");
317 bsdtar->gid = t;
318 break;
319 case OPTION_GNAME: /* cpio */
320 bsdtar->gname = bsdtar->argument;
321 break;
322 case OPTION_GRZIP:
323 if (compression != '\0')
324 lafe_errc(1, 0,
325 "Can't specify both -%c and -%c", opt,
326 compression);
327 compression = opt;
328 compression_name = "grzip";
329 break;
330 case 'H': /* BSD convention */
331 bsdtar->symlink_mode = 'H';
332 break;
333 case 'h': /* Linux Standards Base, gtar; synonym for -L */
334 bsdtar->symlink_mode = 'L';
335 /* Hack: -h by itself is the "help" command. */
336 possible_help_request = 1;
337 break;
338 case OPTION_HELP: /* GNU tar, others */
339 long_help();
340 exit(0);
341 break;
342 case OPTION_HFS_COMPRESSION: /* Mac OS X v10.6 or later */
343 bsdtar->extract_flags |=
344 ARCHIVE_EXTRACT_HFS_COMPRESSION_FORCED;
345 break;
346 case OPTION_IGNORE_ZEROS:
347 bsdtar->option_ignore_zeros = 1;
348 break;
349 case 'I': /* GNU tar */
350 /*
351 * TODO: Allow 'names' to come from an archive,
352 * not just a text file. Design a good UI for
353 * allowing names and mode/owner to be read
354 * from an archive, with contents coming from
355 * disk. This can be used to "refresh" an
356 * archive or to design archives with special
357 * permissions without having to create those
358 * permissions on disk.
359 */
360 bsdtar->names_from_file = bsdtar->argument;
361 break;
362 case OPTION_INCLUDE:
363 /*
364 * No one else has the @archive extension, so
365 * no one else needs this to filter entries
366 * when transforming archives.
367 */
368 if (archive_match_include_pattern(bsdtar->matching,
369 bsdtar->argument) != ARCHIVE_OK)
370 lafe_errc(1, 0,
371 "Failed to add %s to inclusion list",
372 bsdtar->argument);
373 break;
374 case 'j': /* GNU tar */
375 if (compression != '\0')
376 lafe_errc(1, 0,
377 "Can't specify both -%c and -%c", opt,
378 compression);
379 compression = opt;
380 compression_name = "bzip2";
381 break;
382 case 'J': /* GNU tar 1.21 and later */
383 if (compression != '\0')
384 lafe_errc(1, 0,
385 "Can't specify both -%c and -%c", opt,
386 compression);
387 compression = opt;
388 compression_name = "xz";
389 break;
390 case 'k': /* GNU tar */
391 bsdtar->extract_flags |= ARCHIVE_EXTRACT_NO_OVERWRITE;
392 break;
393 case OPTION_KEEP_NEWER_FILES: /* GNU tar */
394 bsdtar->extract_flags |= ARCHIVE_EXTRACT_NO_OVERWRITE_NEWER;
395 break;
396 case 'L': /* BSD convention */
397 bsdtar->symlink_mode = 'L';
398 break;
399 case 'l': /* SUSv2 and GNU tar beginning with 1.16 */
400 /* GNU tar 1.13 used -l for --one-file-system */
401 bsdtar->option_warn_links = 1;
402 break;
403 case OPTION_LRZIP:
404 case OPTION_LZ4:
405 case OPTION_LZIP: /* GNU tar beginning with 1.23 */
406 case OPTION_LZMA: /* GNU tar beginning with 1.20 */
407 case OPTION_LZOP: /* GNU tar beginning with 1.21 */
408 if (compression != '\0')
409 lafe_errc(1, 0,
410 "Can't specify both -%c and -%c", opt,
411 compression);
412 compression = opt;
413 switch (opt) {
414 case OPTION_LRZIP: compression_name = "lrzip"; break;
415 case OPTION_LZ4: compression_name = "lz4"; break;
416 case OPTION_LZIP: compression_name = "lzip"; break;
417 case OPTION_LZMA: compression_name = "lzma"; break;
418 case OPTION_LZOP: compression_name = "lzop"; break;
419 }
420 break;
421 case 'm': /* SUSv2 */
422 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_TIME;
423 break;
424 case 'n': /* GNU tar */
425 bsdtar->option_no_subdirs = 1;
426 break;
427 /*
428 * Selecting files by time:
429 * --newer-?time='date' Only files newer than 'date'
430 * --newer-?time-than='file' Only files newer than time
431 * on specified file (useful for incremental backups)
432 */
433 case OPTION_NEWER_CTIME: /* GNU tar */
434 if (archive_match_include_date(bsdtar->matching,
435 ARCHIVE_MATCH_CTIME | ARCHIVE_MATCH_NEWER,
436 bsdtar->argument) != ARCHIVE_OK)
437 lafe_errc(1, 0, "Error : %s",
438 archive_error_string(bsdtar->matching));
439 break;
440 case OPTION_NEWER_CTIME_THAN:
441 if (archive_match_include_file_time(bsdtar->matching,
442 ARCHIVE_MATCH_CTIME | ARCHIVE_MATCH_NEWER,
443 bsdtar->argument) != ARCHIVE_OK)
444 lafe_errc(1, 0, "Error : %s",
445 archive_error_string(bsdtar->matching));
446 break;
447 case OPTION_NEWER_MTIME: /* GNU tar */
448 if (archive_match_include_date(bsdtar->matching,
449 ARCHIVE_MATCH_MTIME | ARCHIVE_MATCH_NEWER,
450 bsdtar->argument) != ARCHIVE_OK)
451 lafe_errc(1, 0, "Error : %s",
452 archive_error_string(bsdtar->matching));
453 break;
454 case OPTION_NEWER_MTIME_THAN:
455 if (archive_match_include_file_time(bsdtar->matching,
456 ARCHIVE_MATCH_MTIME | ARCHIVE_MATCH_NEWER,
457 bsdtar->argument) != ARCHIVE_OK)
458 lafe_errc(1, 0, "Error : %s",
459 archive_error_string(bsdtar->matching));
460 break;
461 case OPTION_NODUMP: /* star */
462 bsdtar->readdisk_flags |= ARCHIVE_READDISK_HONOR_NODUMP;
463 break;
464 case OPTION_NOPRESERVE_HFS_COMPRESSION:
465 /* Mac OS X v10.6 or later */
466 bsdtar->extract_flags |=
467 ARCHIVE_EXTRACT_NO_HFS_COMPRESSION;
468 break;
469 case OPTION_NO_SAME_OWNER: /* GNU tar */
470 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_OWNER;
471 break;
472 case OPTION_NO_SAME_PERMISSIONS: /* GNU tar */
473 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_PERM;
474 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_ACL;
475 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_XATTR;
476 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_FFLAGS;
477 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_MAC_METADATA;
478 break;
479 case OPTION_NO_XATTR: /* Issue #131 */
480 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_XATTR;
481 bsdtar->readdisk_flags |= ARCHIVE_READDISK_NO_XATTR;
482 break;
483 case OPTION_NULL: /* GNU tar */
484 bsdtar->option_null++;
485 break;
486 case OPTION_NUMERIC_OWNER: /* GNU tar */
487 bsdtar->uname = "";
488 bsdtar->gname = "";
489 bsdtar->option_numeric_owner++;
490 break;
491 case 'O': /* GNU tar */
492 bsdtar->option_stdout = 1;
493 break;
494 case 'o': /* SUSv2 and GNU conflict here, but not fatally */
495 option_o = 1; /* Record it and resolve it later. */
496 break;
497 /*
498 * Selecting files by time:
499 * --older-?time='date' Only files older than 'date'
500 * --older-?time-than='file' Only files older than time
501 * on specified file
502 */
503 case OPTION_OLDER_CTIME:
504 if (archive_match_include_date(bsdtar->matching,
505 ARCHIVE_MATCH_CTIME | ARCHIVE_MATCH_OLDER,
506 bsdtar->argument) != ARCHIVE_OK)
507 lafe_errc(1, 0, "Error : %s",
508 archive_error_string(bsdtar->matching));
509 break;
510 case OPTION_OLDER_CTIME_THAN:
511 if (archive_match_include_file_time(bsdtar->matching,
512 ARCHIVE_MATCH_CTIME | ARCHIVE_MATCH_OLDER,
513 bsdtar->argument) != ARCHIVE_OK)
514 lafe_errc(1, 0, "Error : %s",
515 archive_error_string(bsdtar->matching));
516 break;
517 case OPTION_OLDER_MTIME:
518 if (archive_match_include_date(bsdtar->matching,
519 ARCHIVE_MATCH_MTIME | ARCHIVE_MATCH_OLDER,
520 bsdtar->argument) != ARCHIVE_OK)
521 lafe_errc(1, 0, "Error : %s",
522 archive_error_string(bsdtar->matching));
523 break;
524 case OPTION_OLDER_MTIME_THAN:
525 if (archive_match_include_file_time(bsdtar->matching,
526 ARCHIVE_MATCH_MTIME | ARCHIVE_MATCH_OLDER,
527 bsdtar->argument) != ARCHIVE_OK)
528 lafe_errc(1, 0, "Error : %s",
529 archive_error_string(bsdtar->matching));
530 break;
531 case OPTION_ONE_FILE_SYSTEM: /* GNU tar */
532 bsdtar->readdisk_flags |=
533 ARCHIVE_READDISK_NO_TRAVERSE_MOUNTS;
534 break;
535 case OPTION_OPTIONS:
536 bsdtar->option_options = bsdtar->argument;
537 break;
538 #if 0
539 /*
540 * The common BSD -P option is not necessary, since
541 * our default is to archive symlinks, not follow
542 * them. This is convenient, as -P conflicts with GNU
543 * tar anyway.
544 */
545 case 'P': /* BSD convention */
546 /* Default behavior, no option necessary. */
547 break;
548 #endif
549 case 'P': /* GNU tar */
550 bsdtar->extract_flags &= ~SECURITY;
551 bsdtar->option_absolute_paths = 1;
552 break;
553 case 'p': /* GNU tar, star */
554 bsdtar->extract_flags |= ARCHIVE_EXTRACT_PERM;
555 bsdtar->extract_flags |= ARCHIVE_EXTRACT_ACL;
556 bsdtar->extract_flags |= ARCHIVE_EXTRACT_XATTR;
557 bsdtar->extract_flags |= ARCHIVE_EXTRACT_FFLAGS;
558 bsdtar->extract_flags |= ARCHIVE_EXTRACT_MAC_METADATA;
559 break;
560 case OPTION_PASSPHRASE:
561 bsdtar->passphrase = bsdtar->argument;
562 break;
563 case OPTION_POSIX: /* GNU tar */
564 cset_set_format(bsdtar->cset, "pax");
565 break;
566 case 'q': /* FreeBSD GNU tar --fast-read, NetBSD -q */
567 bsdtar->option_fast_read = 1;
568 break;
569 case 'r': /* SUSv2 */
570 set_mode(bsdtar, opt);
571 break;
572 case 'S': /* NetBSD pax-as-tar */
573 bsdtar->extract_flags |= ARCHIVE_EXTRACT_SPARSE;
574 break;
575 case 's': /* NetBSD pax-as-tar */
576 #if defined(HAVE_REGEX_H) || defined(HAVE_PCREPOSIX_H)
577 add_substitution(bsdtar, bsdtar->argument);
578 #else
579 lafe_warnc(0,
580 "-s is not supported by this version of bsdtar");
581 usage();
582 #endif
583 break;
584 case OPTION_SAME_OWNER: /* GNU tar */
585 bsdtar->extract_flags |= ARCHIVE_EXTRACT_OWNER;
586 break;
587 case OPTION_STRIP_COMPONENTS: /* GNU tar 1.15 */
588 errno = 0;
589 bsdtar->strip_components = strtol(bsdtar->argument,
590 NULL, 0);
591 if (errno)
592 lafe_errc(1, 0,
593 "Invalid --strip-components argument: %s",
594 bsdtar->argument);
595 break;
596 case 'T': /* GNU tar */
597 bsdtar->names_from_file = bsdtar->argument;
598 break;
599 case 't': /* SUSv2 */
600 set_mode(bsdtar, opt);
601 bsdtar->verbose++;
602 break;
603 case OPTION_TOTALS: /* GNU tar */
604 bsdtar->option_totals++;
605 break;
606 case 'U': /* GNU tar */
607 bsdtar->extract_flags |= ARCHIVE_EXTRACT_UNLINK;
608 bsdtar->option_unlink_first = 1;
609 break;
610 case 'u': /* SUSv2 */
611 set_mode(bsdtar, opt);
612 break;
613 case OPTION_UID: /* cpio */
614 t = atoi(bsdtar->argument);
615 if (t < 0)
616 lafe_errc(1, 0,
617 "Argument to --uid must be positive");
618 bsdtar->uid = t;
619 break;
620 case OPTION_UNAME: /* cpio */
621 bsdtar->uname = bsdtar->argument;
622 break;
623 case OPTION_UUENCODE:
624 if (compression2 != '\0')
625 lafe_errc(1, 0,
626 "Can't specify both --uuencode and "
627 "--b64encode");
628 compression2 = opt;
629 compression2_name = "uuencode";
630 break;
631 case 'v': /* SUSv2 */
632 bsdtar->verbose++;
633 break;
634 case OPTION_VERSION: /* GNU convention */
635 version();
636 break;
637 #if 0
638 /*
639 * The -W longopt feature is handled inside of
640 * bsdtar_getopt(), so -W is not available here.
641 */
642 case 'W': /* Obscure GNU convention. */
643 break;
644 #endif
645 case 'w': /* SUSv2 */
646 bsdtar->option_interactive = 1;
647 break;
648 case 'X': /* GNU tar */
649 if (archive_match_exclude_pattern_from_file(
650 bsdtar->matching, bsdtar->argument, 0)
651 != ARCHIVE_OK)
652 lafe_errc(1, 0, "Error : %s",
653 archive_error_string(bsdtar->matching));
654 break;
655 case 'x': /* SUSv2 */
656 set_mode(bsdtar, opt);
657 break;
658 case 'y': /* FreeBSD version of GNU tar */
659 if (compression != '\0')
660 lafe_errc(1, 0,
661 "Can't specify both -%c and -%c", opt,
662 compression);
663 compression = opt;
664 compression_name = "bzip2";
665 break;
666 case 'Z': /* GNU tar */
667 if (compression != '\0')
668 lafe_errc(1, 0,
669 "Can't specify both -%c and -%c", opt,
670 compression);
671 compression = opt;
672 compression_name = "compress";
673 break;
674 case 'z': /* GNU tar, star, many others */
675 if (compression != '\0')
676 lafe_errc(1, 0,
677 "Can't specify both -%c and -%c", opt,
678 compression);
679 compression = opt;
680 compression_name = "gzip";
681 break;
682 case OPTION_USE_COMPRESS_PROGRAM:
683 compress_program = bsdtar->argument;
684 break;
685 default:
686 usage();
687 }
688 }
689
690 /*
691 * Sanity-check options.
692 */
693
694 /* If no "real" mode was specified, treat -h as --help. */
695 if ((bsdtar->mode == '\0') && possible_help_request) {
696 long_help();
697 exit(0);
698 }
699
700 /* Otherwise, a mode is required. */
701 if (bsdtar->mode == '\0')
702 lafe_errc(1, 0,
703 "Must specify one of -c, -r, -t, -u, -x");
704
705 /* Check boolean options only permitted in certain modes. */
706 if (option_a)
707 only_mode(bsdtar, "-a", "c");
708 if (bsdtar->readdisk_flags & ARCHIVE_READDISK_NO_TRAVERSE_MOUNTS)
709 only_mode(bsdtar, "--one-file-system", "cru");
710 if (bsdtar->option_fast_read)
711 only_mode(bsdtar, "--fast-read", "xt");
712 if (bsdtar->extract_flags & ARCHIVE_EXTRACT_HFS_COMPRESSION_FORCED)
713 only_mode(bsdtar, "--hfsCompression", "x");
714 if (bsdtar->extract_flags & ARCHIVE_EXTRACT_NO_HFS_COMPRESSION)
715 only_mode(bsdtar, "--nopreserveHFSCompression", "x");
716 if (bsdtar->readdisk_flags & ARCHIVE_READDISK_HONOR_NODUMP)
717 only_mode(bsdtar, "--nodump", "cru");
718 if (bsdtar->readdisk_flags & ARCHIVE_READDISK_NO_XATTR)
719 only_mode(bsdtar, "--no-xattr", "crux");
720 if (option_o > 0) {
721 switch (bsdtar->mode) {
722 case 'c':
723 /*
724 * In GNU tar, -o means "old format." The
725 * "ustar" format is the closest thing
726 * supported by libarchive.
727 */
728 cset_set_format(bsdtar->cset, "ustar");
729 /* TODO: bsdtar->create_format = "v7"; */
730 break;
731 case 'x':
732 /* POSIX-compatible behavior. */
733 bsdtar->option_no_owner = 1;
734 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_OWNER;
735 break;
736 default:
737 only_mode(bsdtar, "-o", "xc");
738 break;
739 }
740 }
741 if (bsdtar->option_no_subdirs)
742 only_mode(bsdtar, "-n", "cru");
743 if (bsdtar->option_stdout)
744 only_mode(bsdtar, "-O", "xt");
745 if (bsdtar->option_unlink_first)
746 only_mode(bsdtar, "-U", "x");
747 if (bsdtar->option_warn_links)
748 only_mode(bsdtar, "--check-links", "cr");
749
750 if (option_a && cset_auto_compress(bsdtar->cset, bsdtar->filename)) {
751 /* Ignore specified compressions if auto-compress works. */
752 compression = '\0';
753 compression2 = '\0';
754 }
755 /* Check other parameters only permitted in certain modes. */
756 if (compress_program != NULL) {
757 only_mode(bsdtar, "--use-compress-program", "cxt");
758 cset_add_filter_program(bsdtar->cset, compress_program);
759 /* Ignore specified compressions. */
760 compression = '\0';
761 compression2 = '\0';
762 }
763 if (compression != '\0') {
764 switch (compression) {
765 case 'J': case 'j': case 'y': case 'Z': case 'z':
766 strcpy(buff, "-?");
767 buff[1] = compression;
768 break;
769 default:
770 strcpy(buff, "--");
771 strcat(buff, compression_name);
772 break;
773 }
774 only_mode(bsdtar, buff, "cxt");
775 cset_add_filter(bsdtar->cset, compression_name);
776 }
777 if (compression2 != '\0') {
778 strcpy(buff, "--");
779 strcat(buff, compression2_name);
780 only_mode(bsdtar, buff, "cxt");
781 cset_add_filter(bsdtar->cset, compression2_name);
782 }
783 if (cset_get_format(bsdtar->cset) != NULL)
784 only_mode(bsdtar, "--format", "cru");
785 if (bsdtar->symlink_mode != '\0') {
786 strcpy(buff, "-?");
787 buff[1] = bsdtar->symlink_mode;
788 only_mode(bsdtar, buff, "cru");
789 }
790
791 /* Filename "-" implies stdio. */
792 if (strcmp(bsdtar->filename, "-") == 0)
793 bsdtar->filename = NULL;
794
795 switch(bsdtar->mode) {
796 case 'c':
797 tar_mode_c(bsdtar);
798 break;
799 case 'r':
800 tar_mode_r(bsdtar);
801 break;
802 case 't':
803 tar_mode_t(bsdtar);
804 break;
805 case 'u':
806 tar_mode_u(bsdtar);
807 break;
808 case 'x':
809 tar_mode_x(bsdtar);
810 break;
811 }
812
813 archive_match_free(bsdtar->matching);
814 #if defined(HAVE_REGEX_H) || defined(HAVE_PCREPOSIX_H)
815 cleanup_substitution(bsdtar);
816 #endif
817 cset_free(bsdtar->cset);
818 passphrase_free(bsdtar->ppbuff);
819
820 if (bsdtar->return_value != 0)
821 lafe_warnc(0,
822 "Error exit delayed from previous errors.");
823 return (bsdtar->return_value);
824 }
825
826 static void
827 set_mode(struct bsdtar *bsdtar, char opt)
828 {
829 if (bsdtar->mode != '\0' && bsdtar->mode != opt)
830 lafe_errc(1, 0,
831 "Can't specify both -%c and -%c", opt, bsdtar->mode);
832 bsdtar->mode = opt;
833 }
834
835 /*
836 * Verify that the mode is correct.
837 */
838 static void
839 only_mode(struct bsdtar *bsdtar, const char *opt, const char *valid_modes)
840 {
841 if (strchr(valid_modes, bsdtar->mode) == NULL)
842 lafe_errc(1, 0,
843 "Option %s is not permitted in mode -%c",
844 opt, bsdtar->mode);
845 }
846
847
848 void
849 usage(void)
850 {
851 const char *p;
852
853 p = lafe_getprogname();
854
855 fprintf(stderr, "Usage:\n");
856 fprintf(stderr, " List: %s -tf <archive-filename>\n", p);
857 fprintf(stderr, " Extract: %s -xf <archive-filename>\n", p);
858 fprintf(stderr, " Create: %s -cf <archive-filename> [filenames...]\n", p);
859 fprintf(stderr, " Help: %s --help\n", p);
860 exit(1);
861 }
862
863 static void
864 version(void)
865 {
866 printf("bsdtar %s - %s\n",
867 BSDTAR_VERSION_STRING,
868 archive_version_details());
869 exit(0);
870 }
871
872 static const char *long_help_msg =
873 "First option must be a mode specifier:\n"
874 " -c Create -r Add/Replace -t List -u Update -x Extract\n"
875 "Common Options:\n"
876 " -b # Use # 512-byte records per I/O block\n"
877 " -f <filename> Location of archive (default " _PATH_DEFTAPE ")\n"
878 " -v Verbose\n"
879 " -w Interactive\n"
880 "Create: %p -c [options] [<file> | <dir> | @<archive> | -C <dir> ]\n"
881 " <file>, <dir> add these items to archive\n"
882 " -z, -j, -J, --lzma Compress archive with gzip/bzip2/xz/lzma\n"
883 " --format {ustar|pax|cpio|shar} Select archive format\n"
884 " --exclude <pattern> Skip files that match pattern\n"
885 " -C <dir> Change to <dir> before processing remaining files\n"
886 " @<archive> Add entries from <archive> to output\n"
887 "List: %p -t [options] [<patterns>]\n"
888 " <patterns> If specified, list only entries that match\n"
889 "Extract: %p -x [options] [<patterns>]\n"
890 " <patterns> If specified, extract only entries that match\n"
891 " -k Keep (don't overwrite) existing files\n"
892 " -m Don't restore modification times\n"
893 " -O Write entries to stdout, don't restore to disk\n"
894 " -p Restore permissions (including ACLs, owner, file flags)\n";
895
896
897 /*
898 * Note that the word 'bsdtar' will always appear in the first line
899 * of output.
900 *
901 * In particular, /bin/sh scripts that need to test for the presence
902 * of bsdtar can use the following template:
903 *
904 * if (tar --help 2>&1 | grep bsdtar >/dev/null 2>&1 ) then \
905 * echo bsdtar; else echo not bsdtar; fi
906 */
907 static void
908 long_help(void)
909 {
910 const char *prog;
911 const char *p;
912
913 prog = lafe_getprogname();
914
915 fflush(stderr);
916
917 p = (strcmp(prog,"bsdtar") != 0) ? "(bsdtar)" : "";
918 printf("%s%s: manipulate archive files\n", prog, p);
919
920 for (p = long_help_msg; *p != '\0'; p++) {
921 if (*p == '%') {
922 if (p[1] == 'p') {
923 fputs(prog, stdout);
924 p++;
925 } else
926 putchar('%');
927 } else
928 putchar(*p);
929 }
930 version();
931 }
DragonFly BSD