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
siginfo_handler(int sig)100 siginfo_handler(int sig)
101 {
102 (void)sig; /* UNUSED */
103 siginfo_occurred = 1;
104 }
105
106 int
need_report(void)107 need_report(void)
108 {
109 int r = siginfo_occurred;
110 siginfo_occurred = 0;
111 return (r);
112 }
113 #else
114 int
need_report(void)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
main(int argc,char ** argv)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
182 /* Need lafe_progname before calling lafe_warnc. */
183 if (*argv == NULL)
184 lafe_progname = "bsdtar";
185 else {
186 #if defined(_WIN32) && !defined(__CYGWIN__)
187 lafe_progname = strrchr(*argv, '\\');
188 if (strrchr(*argv, '/') > lafe_progname)
189 #endif
190 lafe_progname = strrchr(*argv, '/');
191 if (lafe_progname != NULL)
192 lafe_progname++;
193 else
194 lafe_progname = *argv;
195 }
196
197 #if HAVE_SETLOCALE
198 if (setlocale(LC_ALL, "") == NULL)
199 lafe_warnc(0, "Failed to set default locale");
200 #endif
201 #if defined(HAVE_NL_LANGINFO) && defined(HAVE_D_MD_ORDER)
202 bsdtar->day_first = (*nl_langinfo(D_MD_ORDER) == 'd');
203 #endif
204 possible_help_request = 0;
205
206 /* Look up uid of current user for future reference */
207 bsdtar->user_uid = geteuid();
208
209 /* Default: open tape drive. */
210 bsdtar->filename = getenv("TAPE");
211 if (bsdtar->filename == NULL)
212 bsdtar->filename = _PATH_DEFTAPE;
213
214 /* Default block size settings. */
215 bsdtar->bytes_per_block = DEFAULT_BYTES_PER_BLOCK;
216 /* Allow library to default this unless user specifies -b. */
217 bsdtar->bytes_in_last_block = -1;
218
219 /* Default: preserve mod time on extract */
220 bsdtar->extract_flags = ARCHIVE_EXTRACT_TIME;
221
222 /* Default: Perform basic security checks. */
223 bsdtar->extract_flags |= SECURITY;
224
225 #ifndef _WIN32
226 /* On POSIX systems, assume --same-owner and -p when run by
227 * the root user. This doesn't make any sense on Windows. */
228 if (bsdtar->user_uid == 0) {
229 /* --same-owner */
230 bsdtar->extract_flags |= ARCHIVE_EXTRACT_OWNER;
231 /* -p */
232 bsdtar->extract_flags |= ARCHIVE_EXTRACT_PERM;
233 bsdtar->extract_flags |= ARCHIVE_EXTRACT_ACL;
234 bsdtar->extract_flags |= ARCHIVE_EXTRACT_XATTR;
235 bsdtar->extract_flags |= ARCHIVE_EXTRACT_FFLAGS;
236 bsdtar->extract_flags |= ARCHIVE_EXTRACT_MAC_METADATA;
237 }
238 #endif
239
240 /*
241 * Enable Mac OS "copyfile()" extension by default.
242 * This has no effect on other platforms.
243 */
244 bsdtar->readdisk_flags |= ARCHIVE_READDISK_MAC_COPYFILE;
245 #ifdef COPYFILE_DISABLE_VAR
246 if (getenv(COPYFILE_DISABLE_VAR))
247 bsdtar->readdisk_flags &= ~ARCHIVE_READDISK_MAC_COPYFILE;
248 #endif
249 bsdtar->matching = archive_match_new();
250 if (bsdtar->matching == NULL)
251 lafe_errc(1, errno, "Out of memory");
252 bsdtar->cset = cset_new();
253 if (bsdtar->cset == NULL)
254 lafe_errc(1, errno, "Out of memory");
255
256 bsdtar->argv = argv;
257 bsdtar->argc = argc;
258
259 /*
260 * Comments following each option indicate where that option
261 * originated: SUSv2, POSIX, GNU tar, star, etc. If there's
262 * no such comment, then I don't know of anyone else who
263 * implements that option.
264 */
265 while ((opt = bsdtar_getopt(bsdtar)) != -1) {
266 switch (opt) {
267 case 'a': /* GNU tar */
268 option_a = 1; /* Record it and resolve it later. */
269 break;
270 case 'B': /* GNU tar */
271 /* libarchive doesn't need this; just ignore it. */
272 break;
273 case 'b': /* SUSv2 */
274 t = atoi(bsdtar->argument);
275 if (t <= 0 || t > 8192)
276 lafe_errc(1, 0,
277 "Argument to -b is out of range (1..8192)");
278 bsdtar->bytes_per_block = 512 * t;
279 /* Explicit -b forces last block size. */
280 bsdtar->bytes_in_last_block = bsdtar->bytes_per_block;
281 break;
282 case OPTION_B64ENCODE:
283 if (compression2 != '\0')
284 lafe_errc(1, 0,
285 "Can't specify both --uuencode and "
286 "--b64encode");
287 compression2 = opt;
288 compression2_name = "b64encode";
289 break;
290 case 'C': /* GNU tar */
291 if (strlen(bsdtar->argument) == 0)
292 lafe_errc(1, 0,
293 "Meaningless option: -C ''");
294
295 set_chdir(bsdtar, bsdtar->argument);
296 break;
297 case 'c': /* SUSv2 */
298 set_mode(bsdtar, opt);
299 break;
300 case OPTION_CHECK_LINKS: /* GNU tar */
301 bsdtar->option_warn_links = 1;
302 break;
303 case OPTION_CHROOT: /* NetBSD */
304 bsdtar->option_chroot = 1;
305 break;
306 case OPTION_DISABLE_COPYFILE: /* Mac OS X */
307 bsdtar->readdisk_flags &= ~ARCHIVE_READDISK_MAC_COPYFILE;
308 break;
309 case OPTION_EXCLUDE: /* GNU tar */
310 if (archive_match_exclude_pattern(
311 bsdtar->matching, bsdtar->argument) != ARCHIVE_OK)
312 lafe_errc(1, 0,
313 "Couldn't exclude %s\n", bsdtar->argument);
314 break;
315 case OPTION_FORMAT: /* GNU tar, others */
316 cset_set_format(bsdtar->cset, bsdtar->argument);
317 break;
318 case 'f': /* SUSv2 */
319 bsdtar->filename = bsdtar->argument;
320 break;
321 case OPTION_GID: /* cpio */
322 t = atoi(bsdtar->argument);
323 if (t < 0)
324 lafe_errc(1, 0,
325 "Argument to --gid must be positive");
326 bsdtar->gid = t;
327 break;
328 case OPTION_GNAME: /* cpio */
329 bsdtar->gname = bsdtar->argument;
330 break;
331 case OPTION_GRZIP:
332 if (compression != '\0')
333 lafe_errc(1, 0,
334 "Can't specify both -%c and -%c", opt,
335 compression);
336 compression = opt;
337 compression_name = "grzip";
338 break;
339 case 'H': /* BSD convention */
340 bsdtar->symlink_mode = 'H';
341 break;
342 case 'h': /* Linux Standards Base, gtar; synonym for -L */
343 bsdtar->symlink_mode = 'L';
344 /* Hack: -h by itself is the "help" command. */
345 possible_help_request = 1;
346 break;
347 case OPTION_HELP: /* GNU tar, others */
348 long_help();
349 exit(0);
350 break;
351 case OPTION_HFS_COMPRESSION: /* Mac OS X v10.6 or later */
352 bsdtar->extract_flags |=
353 ARCHIVE_EXTRACT_HFS_COMPRESSION_FORCED;
354 break;
355 case 'I': /* GNU tar */
356 /*
357 * TODO: Allow 'names' to come from an archive,
358 * not just a text file. Design a good UI for
359 * allowing names and mode/owner to be read
360 * from an archive, with contents coming from
361 * disk. This can be used to "refresh" an
362 * archive or to design archives with special
363 * permissions without having to create those
364 * permissions on disk.
365 */
366 bsdtar->names_from_file = bsdtar->argument;
367 break;
368 case OPTION_INCLUDE:
369 /*
370 * No one else has the @archive extension, so
371 * no one else needs this to filter entries
372 * when transforming archives.
373 */
374 if (archive_match_include_pattern(bsdtar->matching,
375 bsdtar->argument) != ARCHIVE_OK)
376 lafe_errc(1, 0,
377 "Failed to add %s to inclusion list",
378 bsdtar->argument);
379 break;
380 case 'j': /* GNU tar */
381 if (compression != '\0')
382 lafe_errc(1, 0,
383 "Can't specify both -%c and -%c", opt,
384 compression);
385 compression = opt;
386 compression_name = "bzip2";
387 break;
388 case 'J': /* GNU tar 1.21 and later */
389 if (compression != '\0')
390 lafe_errc(1, 0,
391 "Can't specify both -%c and -%c", opt,
392 compression);
393 compression = opt;
394 compression_name = "xz";
395 break;
396 case 'k': /* GNU tar */
397 bsdtar->extract_flags |= ARCHIVE_EXTRACT_NO_OVERWRITE;
398 break;
399 case OPTION_KEEP_NEWER_FILES: /* GNU tar */
400 bsdtar->extract_flags |= ARCHIVE_EXTRACT_NO_OVERWRITE_NEWER;
401 break;
402 case 'L': /* BSD convention */
403 bsdtar->symlink_mode = 'L';
404 break;
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;
408 break;
409 case OPTION_LRZIP:
410 case OPTION_LZIP: /* GNU tar beginning with 1.23 */
411 case OPTION_LZMA: /* GNU tar beginning with 1.20 */
412 case OPTION_LZOP: /* GNU tar beginning with 1.21 */
413 if (compression != '\0')
414 lafe_errc(1, 0,
415 "Can't specify both -%c and -%c", opt,
416 compression);
417 compression = opt;
418 switch (opt) {
419 case OPTION_LRZIP: compression_name = "lrzip"; break;
420 case OPTION_LZIP: compression_name = "lzip"; break;
421 case OPTION_LZMA: compression_name = "lzma"; break;
422 case OPTION_LZOP: compression_name = "lzop"; break;
423 }
424 break;
425 case 'm': /* SUSv2 */
426 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_TIME;
427 break;
428 case 'n': /* GNU tar */
429 bsdtar->option_no_subdirs = 1;
430 break;
431 /*
432 * Selecting files by time:
433 * --newer-?time='date' Only files newer than 'date'
434 * --newer-?time-than='file' Only files newer than time
435 * on specified file (useful for incremental backups)
436 */
437 case OPTION_NEWER_CTIME: /* GNU tar */
438 if (archive_match_include_date(bsdtar->matching,
439 ARCHIVE_MATCH_CTIME | ARCHIVE_MATCH_NEWER,
440 bsdtar->argument) != ARCHIVE_OK)
441 lafe_errc(1, 0, "Error : %s",
442 archive_error_string(bsdtar->matching));
443 break;
444 case OPTION_NEWER_CTIME_THAN:
445 if (archive_match_include_file_time(bsdtar->matching,
446 ARCHIVE_MATCH_CTIME | ARCHIVE_MATCH_NEWER,
447 bsdtar->argument) != ARCHIVE_OK)
448 lafe_errc(1, 0, "Error : %s",
449 archive_error_string(bsdtar->matching));
450 break;
451 case OPTION_NEWER_MTIME: /* GNU tar */
452 if (archive_match_include_date(bsdtar->matching,
453 ARCHIVE_MATCH_MTIME | ARCHIVE_MATCH_NEWER,
454 bsdtar->argument) != ARCHIVE_OK)
455 lafe_errc(1, 0, "Error : %s",
456 archive_error_string(bsdtar->matching));
457 break;
458 case OPTION_NEWER_MTIME_THAN:
459 if (archive_match_include_file_time(bsdtar->matching,
460 ARCHIVE_MATCH_MTIME | ARCHIVE_MATCH_NEWER,
461 bsdtar->argument) != ARCHIVE_OK)
462 lafe_errc(1, 0, "Error : %s",
463 archive_error_string(bsdtar->matching));
464 break;
465 case OPTION_NODUMP: /* star */
466 bsdtar->readdisk_flags |= ARCHIVE_READDISK_HONOR_NODUMP;
467 break;
468 case OPTION_NOPRESERVE_HFS_COMPRESSION:
469 /* Mac OS X v10.6 or later */
470 bsdtar->extract_flags |=
471 ARCHIVE_EXTRACT_NO_HFS_COMPRESSION;
472 break;
473 case OPTION_NO_SAME_OWNER: /* GNU tar */
474 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_OWNER;
475 break;
476 case OPTION_NO_SAME_PERMISSIONS: /* GNU tar */
477 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_PERM;
478 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_ACL;
479 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_XATTR;
480 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_FFLAGS;
481 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_MAC_METADATA;
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_POSIX: /* GNU tar */
561 cset_set_format(bsdtar->cset, "pax");
562 break;
563 case 'q': /* FreeBSD GNU tar --fast-read, NetBSD -q */
564 bsdtar->option_fast_read = 1;
565 break;
566 case 'r': /* SUSv2 */
567 set_mode(bsdtar, opt);
568 break;
569 case 'S': /* NetBSD pax-as-tar */
570 bsdtar->extract_flags |= ARCHIVE_EXTRACT_SPARSE;
571 break;
572 case 's': /* NetBSD pax-as-tar */
573 #if defined(HAVE_REGEX_H) || defined(HAVE_PCREPOSIX_H)
574 add_substitution(bsdtar, bsdtar->argument);
575 #else
576 lafe_warnc(0,
577 "-s is not supported by this version of bsdtar");
578 usage();
579 #endif
580 break;
581 case OPTION_SAME_OWNER: /* GNU tar */
582 bsdtar->extract_flags |= ARCHIVE_EXTRACT_OWNER;
583 break;
584 case OPTION_STRIP_COMPONENTS: /* GNU tar 1.15 */
585 errno = 0;
586 bsdtar->strip_components = strtol(bsdtar->argument,
587 NULL, 0);
588 if (errno)
589 lafe_errc(1, 0,
590 "Invalid --strip-components argument: %s",
591 bsdtar->argument);
592 break;
593 case 'T': /* GNU tar */
594 bsdtar->names_from_file = bsdtar->argument;
595 break;
596 case 't': /* SUSv2 */
597 set_mode(bsdtar, opt);
598 bsdtar->verbose++;
599 break;
600 case OPTION_TOTALS: /* GNU tar */
601 bsdtar->option_totals++;
602 break;
603 case 'U': /* GNU tar */
604 bsdtar->extract_flags |= ARCHIVE_EXTRACT_UNLINK;
605 bsdtar->option_unlink_first = 1;
606 break;
607 case 'u': /* SUSv2 */
608 set_mode(bsdtar, opt);
609 break;
610 case OPTION_UID: /* cpio */
611 t = atoi(bsdtar->argument);
612 if (t < 0)
613 lafe_errc(1, 0,
614 "Argument to --uid must be positive");
615 bsdtar->uid = t;
616 break;
617 case OPTION_UNAME: /* cpio */
618 bsdtar->uname = bsdtar->argument;
619 break;
620 case OPTION_UUENCODE:
621 if (compression2 != '\0')
622 lafe_errc(1, 0,
623 "Can't specify both --uuencode and "
624 "--b64encode");
625 compression2 = opt;
626 compression2_name = "uuencode";
627 break;
628 case 'v': /* SUSv2 */
629 bsdtar->verbose++;
630 break;
631 case OPTION_VERSION: /* GNU convention */
632 version();
633 break;
634 #if 0
635 /*
636 * The -W longopt feature is handled inside of
637 * bsdtar_getopt(), so -W is not available here.
638 */
639 case 'W': /* Obscure GNU convention. */
640 break;
641 #endif
642 case 'w': /* SUSv2 */
643 bsdtar->option_interactive = 1;
644 break;
645 case 'X': /* GNU tar */
646 if (archive_match_exclude_pattern_from_file(
647 bsdtar->matching, bsdtar->argument, 0)
648 != ARCHIVE_OK)
649 lafe_errc(1, 0, "Error : %s",
650 archive_error_string(bsdtar->matching));
651 break;
652 case 'x': /* SUSv2 */
653 set_mode(bsdtar, opt);
654 break;
655 case 'y': /* FreeBSD version of GNU tar */
656 if (compression != '\0')
657 lafe_errc(1, 0,
658 "Can't specify both -%c and -%c", opt,
659 compression);
660 compression = opt;
661 compression_name = "bzip2";
662 break;
663 case 'Z': /* GNU tar */
664 if (compression != '\0')
665 lafe_errc(1, 0,
666 "Can't specify both -%c and -%c", opt,
667 compression);
668 compression = opt;
669 compression_name = "compress";
670 break;
671 case 'z': /* GNU tar, star, many others */
672 if (compression != '\0')
673 lafe_errc(1, 0,
674 "Can't specify both -%c and -%c", opt,
675 compression);
676 compression = opt;
677 compression_name = "gzip";
678 break;
679 case OPTION_USE_COMPRESS_PROGRAM:
680 compress_program = bsdtar->argument;
681 break;
682 default:
683 usage();
684 }
685 }
686
687 /*
688 * Sanity-check options.
689 */
690
691 /* If no "real" mode was specified, treat -h as --help. */
692 if ((bsdtar->mode == '\0') && possible_help_request) {
693 long_help();
694 exit(0);
695 }
696
697 /* Otherwise, a mode is required. */
698 if (bsdtar->mode == '\0')
699 lafe_errc(1, 0,
700 "Must specify one of -c, -r, -t, -u, -x");
701
702 /* Check boolean options only permitted in certain modes. */
703 if (option_a)
704 only_mode(bsdtar, "-a", "c");
705 if (bsdtar->readdisk_flags & ARCHIVE_READDISK_NO_TRAVERSE_MOUNTS)
706 only_mode(bsdtar, "--one-file-system", "cru");
707 if (bsdtar->option_fast_read)
708 only_mode(bsdtar, "--fast-read", "xt");
709 if (bsdtar->extract_flags & ARCHIVE_EXTRACT_HFS_COMPRESSION_FORCED)
710 only_mode(bsdtar, "--hfsCompression", "x");
711 if (bsdtar->extract_flags & ARCHIVE_EXTRACT_NO_HFS_COMPRESSION)
712 only_mode(bsdtar, "--nopreserveHFSCompression", "x");
713 if (bsdtar->readdisk_flags & ARCHIVE_READDISK_HONOR_NODUMP)
714 only_mode(bsdtar, "--nodump", "cru");
715 if (option_o > 0) {
716 switch (bsdtar->mode) {
717 case 'c':
718 /*
719 * In GNU tar, -o means "old format." The
720 * "ustar" format is the closest thing
721 * supported by libarchive.
722 */
723 cset_set_format(bsdtar->cset, "ustar");
724 /* TODO: bsdtar->create_format = "v7"; */
725 break;
726 case 'x':
727 /* POSIX-compatible behavior. */
728 bsdtar->option_no_owner = 1;
729 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_OWNER;
730 break;
731 default:
732 only_mode(bsdtar, "-o", "xc");
733 break;
734 }
735 }
736 if (bsdtar->option_no_subdirs)
737 only_mode(bsdtar, "-n", "cru");
738 if (bsdtar->option_stdout)
739 only_mode(bsdtar, "-O", "xt");
740 if (bsdtar->option_unlink_first)
741 only_mode(bsdtar, "-U", "x");
742 if (bsdtar->option_warn_links)
743 only_mode(bsdtar, "--check-links", "cr");
744
745 if (option_a && cset_auto_compress(bsdtar->cset, bsdtar->filename)) {
746 /* Ignore specified compressions if auto-compress works. */
747 compression = '\0';
748 compression2 = '\0';
749 }
750 /* Check other parameters only permitted in certain modes. */
751 if (compress_program != NULL) {
752 only_mode(bsdtar, "--use-compress-program", "cxt");
753 cset_add_filter_program(bsdtar->cset, compress_program);
754 /* Ignore specified compressions. */
755 compression = '\0';
756 compression2 = '\0';
757 }
758 if (compression != '\0') {
759 switch (compression) {
760 case 'J': case 'j': case 'y': case 'Z': case 'z':
761 strcpy(buff, "-?");
762 buff[1] = compression;
763 break;
764 default:
765 strcpy(buff, "--");
766 strcat(buff, compression_name);
767 break;
768 }
769 only_mode(bsdtar, buff, "cxt");
770 cset_add_filter(bsdtar->cset, compression_name);
771 }
772 if (compression2 != '\0') {
773 strcpy(buff, "--");
774 strcat(buff, compression2_name);
775 only_mode(bsdtar, buff, "cxt");
776 cset_add_filter(bsdtar->cset, compression2_name);
777 }
778 if (cset_get_format(bsdtar->cset) != NULL)
779 only_mode(bsdtar, "--format", "cru");
780 if (bsdtar->symlink_mode != '\0') {
781 strcpy(buff, "-?");
782 buff[1] = bsdtar->symlink_mode;
783 only_mode(bsdtar, buff, "cru");
784 }
785
786 /* Filename "-" implies stdio. */
787 if (strcmp(bsdtar->filename, "-") == 0)
788 bsdtar->filename = NULL;
789
790 switch(bsdtar->mode) {
791 case 'c':
792 tar_mode_c(bsdtar);
793 break;
794 case 'r':
795 tar_mode_r(bsdtar);
796 break;
797 case 't':
798 tar_mode_t(bsdtar);
799 break;
800 case 'u':
801 tar_mode_u(bsdtar);
802 break;
803 case 'x':
804 tar_mode_x(bsdtar);
805 break;
806 }
807
808 archive_match_free(bsdtar->matching);
809 #if defined(HAVE_REGEX_H) || defined(HAVE_PCREPOSIX_H)
810 cleanup_substitution(bsdtar);
811 #endif
812 cset_free(bsdtar->cset);
813
814 if (bsdtar->return_value != 0)
815 lafe_warnc(0,
816 "Error exit delayed from previous errors.");
817 return (bsdtar->return_value);
818 }
819
820 static void
set_mode(struct bsdtar * bsdtar,char opt)821 set_mode(struct bsdtar *bsdtar, char opt)
822 {
823 if (bsdtar->mode != '\0' && bsdtar->mode != opt)
824 lafe_errc(1, 0,
825 "Can't specify both -%c and -%c", opt, bsdtar->mode);
826 bsdtar->mode = opt;
827 }
828
829 /*
830 * Verify that the mode is correct.
831 */
832 static void
only_mode(struct bsdtar * bsdtar,const char * opt,const char * valid_modes)833 only_mode(struct bsdtar *bsdtar, const char *opt, const char *valid_modes)
834 {
835 if (strchr(valid_modes, bsdtar->mode) == NULL)
836 lafe_errc(1, 0,
837 "Option %s is not permitted in mode -%c",
838 opt, bsdtar->mode);
839 }
840
841
842 void
usage(void)843 usage(void)
844 {
845 const char *p;
846
847 p = lafe_progname;
848
849 fprintf(stderr, "Usage:\n");
850 fprintf(stderr, " List: %s -tf <archive-filename>\n", p);
851 fprintf(stderr, " Extract: %s -xf <archive-filename>\n", p);
852 fprintf(stderr, " Create: %s -cf <archive-filename> [filenames...]\n", p);
853 fprintf(stderr, " Help: %s --help\n", p);
854 exit(1);
855 }
856
857 static void
version(void)858 version(void)
859 {
860 printf("bsdtar %s - %s\n",
861 BSDTAR_VERSION_STRING,
862 archive_version_string());
863 exit(0);
864 }
865
866 static const char *long_help_msg =
867 "First option must be a mode specifier:\n"
868 " -c Create -r Add/Replace -t List -u Update -x Extract\n"
869 "Common Options:\n"
870 " -b # Use # 512-byte records per I/O block\n"
871 " -f <filename> Location of archive (default " _PATH_DEFTAPE ")\n"
872 " -v Verbose\n"
873 " -w Interactive\n"
874 "Create: %p -c [options] [<file> | <dir> | @<archive> | -C <dir> ]\n"
875 " <file>, <dir> add these items to archive\n"
876 " -z, -j, -J, --lzma Compress archive with gzip/bzip2/xz/lzma\n"
877 " --format {ustar|pax|cpio|shar} Select archive format\n"
878 " --exclude <pattern> Skip files that match pattern\n"
879 " -C <dir> Change to <dir> before processing remaining files\n"
880 " @<archive> Add entries from <archive> to output\n"
881 "List: %p -t [options] [<patterns>]\n"
882 " <patterns> If specified, list only entries that match\n"
883 "Extract: %p -x [options] [<patterns>]\n"
884 " <patterns> If specified, extract only entries that match\n"
885 " -k Keep (don't overwrite) existing files\n"
886 " -m Don't restore modification times\n"
887 " -O Write entries to stdout, don't restore to disk\n"
888 " -p Restore permissions (including ACLs, owner, file flags)\n";
889
890
891 /*
892 * Note that the word 'bsdtar' will always appear in the first line
893 * of output.
894 *
895 * In particular, /bin/sh scripts that need to test for the presence
896 * of bsdtar can use the following template:
897 *
898 * if (tar --help 2>&1 | grep bsdtar >/dev/null 2>&1 ) then \
899 * echo bsdtar; else echo not bsdtar; fi
900 */
901 static void
long_help(void)902 long_help(void)
903 {
904 const char *prog;
905 const char *p;
906
907 prog = lafe_progname;
908
909 fflush(stderr);
910
911 p = (strcmp(prog,"bsdtar") != 0) ? "(bsdtar)" : "";
912 printf("%s%s: manipulate archive files\n", prog, p);
913
914 for (p = long_help_msg; *p != '\0'; p++) {
915 if (*p == '%') {
916 if (p[1] == 'p') {
917 fputs(prog, stdout);
918 p++;
919 } else
920 putchar('%');
921 } else
922 putchar(*p);
923 }
924 version();
925 }
926