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