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 #if ARCHIVE_VERSION_NUMBER < 4000000 && !defined(_PATH_DEFTAPE)
74 // Libarchive 4.0 and later will NOT define _PATH_DEFTAPE
75 // but will honor it if it's set in the build.
76 // Until then, we'll continue to set it by default on certain platforms:
77 #if defined(__linux)
78 #define _PATH_DEFTAPE "/dev/st0"
79 #elif defined(_WIN32) && !defined(__CYGWIN__)
80 #define _PATH_DEFTAPE "\\\\.\\tape0"
81 #elif !defined(__APPLE__)
82 #define _PATH_DEFTAPE "/dev/tape"
83 #endif
84 #endif
85
86 #define _PATH_STDIO "-"
87
88 #ifdef __MINGW32__
89 int _CRT_glob = 0; /* Disable broken CRT globbing. */
90 #endif
91
92 #if defined(HAVE_SIGACTION) && (defined(SIGINFO) || defined(SIGUSR1))
93 static volatile int siginfo_occurred;
94
95 static void
siginfo_handler(int sig)96 siginfo_handler(int sig)
97 {
98 (void)sig; /* UNUSED */
99 siginfo_occurred = 1;
100 }
101
102 int
need_report(void)103 need_report(void)
104 {
105 int r = siginfo_occurred;
106 siginfo_occurred = 0;
107 return (r);
108 }
109 #else
110 int
need_report(void)111 need_report(void)
112 {
113 return (0);
114 }
115 #endif
116
117 static void long_help(void) __LA_DEAD;
118 static void only_mode(struct bsdtar *, const char *opt,
119 const char *valid);
120 static void set_mode(struct bsdtar *, char opt);
121 static void version(void) __LA_DEAD;
122
123 /* A basic set of security flags to request from libarchive. */
124 #define SECURITY \
125 (ARCHIVE_EXTRACT_SECURE_SYMLINKS \
126 | ARCHIVE_EXTRACT_SECURE_NODOTDOT)
127
128 static char const * const vcs_files[] = {
129 /* CVS */
130 "CVS", ".cvsignore",
131 /* RCS */
132 "RCS",
133 /* SCCS */
134 "SCCS",
135 /* SVN */
136 ".svn",
137 /* git */
138 ".git", ".gitignore", ".gitattributes", ".gitmodules",
139 /* Arch */
140 ".arch-ids", "{arch}", "=RELEASE-ID", "=meta-update", "=update",
141 /* Bazaar */
142 ".bzr", ".bzrignore", ".bzrtags",
143 /* Mercurial */
144 ".hg", ".hgignore", ".hgtags",
145 /* darcs */
146 "_darcs",
147 NULL
148 };
149
150 int
main(int argc,char ** argv)151 main(int argc, char **argv)
152 {
153 struct bsdtar *bsdtar, bsdtar_storage;
154 int opt, t;
155 char compression, compression2;
156 const char *compression_name, *compression2_name;
157 const char *compress_program;
158 char *tptr;
159 char possible_help_request;
160 char buff[16];
161
162 /*
163 * Use a pointer for consistency, but stack-allocated storage
164 * for ease of cleanup.
165 */
166 bsdtar = &bsdtar_storage;
167 memset(bsdtar, 0, sizeof(*bsdtar));
168 bsdtar->fd = -1; /* Mark as "unused" */
169 bsdtar->gid = -1;
170 bsdtar->uid = -1;
171 bsdtar->flags = 0;
172 compression = compression2 = '\0';
173 compression_name = compression2_name = NULL;
174 compress_program = NULL;
175
176 #if defined(HAVE_SIGACTION)
177 { /* Set up signal handling. */
178 struct sigaction sa;
179 sa.sa_handler = siginfo_handler;
180 sigemptyset(&sa.sa_mask);
181 sa.sa_flags = 0;
182 #ifdef SIGINFO
183 if (sigaction(SIGINFO, &sa, NULL))
184 lafe_errc(1, errno, "sigaction(SIGINFO) failed");
185 #endif
186 #ifdef SIGUSR1
187 /* ... and treat SIGUSR1 the same way as SIGINFO. */
188 if (sigaction(SIGUSR1, &sa, NULL))
189 lafe_errc(1, errno, "sigaction(SIGUSR1) failed");
190 #endif
191 #ifdef SIGPIPE
192 /* Ignore SIGPIPE signals. */
193 sa.sa_handler = SIG_IGN;
194 sigaction(SIGPIPE, &sa, NULL);
195 #endif
196 }
197 #endif
198
199 /* Set lafe_progname before calling lafe_warnc. */
200 lafe_setprogname(*argv, "bsdtar");
201
202 #if HAVE_SETLOCALE
203 if (setlocale(LC_ALL, "") == NULL)
204 lafe_warnc(0, "Failed to set default locale");
205 #endif
206 #if defined(HAVE_NL_LANGINFO) && defined(HAVE_D_MD_ORDER)
207 bsdtar->day_first = (*nl_langinfo(D_MD_ORDER) == 'd');
208 #endif
209 possible_help_request = 0;
210
211 /* Look up uid of current user for future reference */
212 bsdtar->user_uid = geteuid();
213
214 /* Default: open tape drive. */
215 bsdtar->filename = getenv("TAPE");
216 #if defined(_PATH_DEFTAPE)
217 if (bsdtar->filename == NULL) {
218 #if defined(_WIN32) && !defined(__CYGWIN__)
219 int tapeExists = !_access(_PATH_DEFTAPE, 0);
220 #else
221 int tapeExists = !access(_PATH_DEFTAPE, F_OK);
222 #endif
223 if (tapeExists) {
224 bsdtar->filename = _PATH_DEFTAPE;
225 }
226 }
227 #endif
228 if (bsdtar->filename == NULL) {
229 bsdtar->filename = _PATH_STDIO;
230 }
231
232 /* Default block size settings. */
233 bsdtar->bytes_per_block = DEFAULT_BYTES_PER_BLOCK;
234 /* Allow library to default this unless user specifies -b. */
235 bsdtar->bytes_in_last_block = -1;
236
237 /* Default: preserve mod time on extract */
238 bsdtar->extract_flags = ARCHIVE_EXTRACT_TIME;
239
240 /* Default: Perform basic security checks. */
241 bsdtar->extract_flags |= SECURITY;
242
243 #ifndef _WIN32
244 /* On POSIX systems, assume --same-owner and -p when run by
245 * the root user. This doesn't make any sense on Windows. */
246 if (bsdtar->user_uid == 0) {
247 /* --same-owner */
248 bsdtar->extract_flags |= ARCHIVE_EXTRACT_OWNER;
249 /* -p */
250 bsdtar->extract_flags |= ARCHIVE_EXTRACT_PERM;
251 bsdtar->extract_flags |= ARCHIVE_EXTRACT_ACL;
252 bsdtar->extract_flags |= ARCHIVE_EXTRACT_XATTR;
253 bsdtar->extract_flags |= ARCHIVE_EXTRACT_FFLAGS;
254 bsdtar->extract_flags |= ARCHIVE_EXTRACT_MAC_METADATA;
255 }
256 #endif
257
258 /*
259 * Enable Mac OS "copyfile()" extension by default.
260 * This has no effect on other platforms.
261 */
262 bsdtar->readdisk_flags |= ARCHIVE_READDISK_MAC_COPYFILE;
263 #ifdef COPYFILE_DISABLE_VAR
264 if (getenv(COPYFILE_DISABLE_VAR))
265 bsdtar->readdisk_flags &= ~ARCHIVE_READDISK_MAC_COPYFILE;
266 #endif
267 #if defined(__APPLE__)
268 /*
269 * On Mac OS ACLs are archived with copyfile() (--mac-metadata)
270 * Translation to NFSv4 ACLs has to be requested explicitly with --acls
271 */
272 bsdtar->readdisk_flags |= ARCHIVE_READDISK_NO_ACL;
273 #endif
274
275 bsdtar->matching = archive_match_new();
276 if (bsdtar->matching == NULL)
277 lafe_errc(1, errno, "Out of memory");
278 bsdtar->cset = cset_new();
279 if (bsdtar->cset == NULL)
280 lafe_errc(1, errno, "Out of memory");
281
282 bsdtar->argv = argv;
283 bsdtar->argc = argc;
284
285 /*
286 * Comments following each option indicate where that option
287 * originated: SUSv2, POSIX, GNU tar, star, etc. If there's
288 * no such comment, then I don't know of anyone else who
289 * implements that option.
290 */
291 while ((opt = bsdtar_getopt(bsdtar)) != -1) {
292 switch (opt) {
293 case 'a': /* GNU tar */
294 bsdtar->flags |= OPTFLAG_AUTO_COMPRESS;
295 break;
296 case OPTION_ACLS: /* GNU tar */
297 bsdtar->extract_flags |= ARCHIVE_EXTRACT_ACL;
298 bsdtar->readdisk_flags &= ~ARCHIVE_READDISK_NO_ACL;
299 bsdtar->flags |= OPTFLAG_ACLS;
300 break;
301 case 'B': /* GNU tar */
302 /* libarchive doesn't need this; just ignore it. */
303 break;
304 case 'b': /* SUSv2 */
305 errno = 0;
306 tptr = NULL;
307 t = (int)strtol(bsdtar->argument, &tptr, 10);
308 if (errno || t <= 0 || t > 8192 ||
309 *(bsdtar->argument) == '\0' || tptr == NULL ||
310 *tptr != '\0') {
311 lafe_errc(1, 0, "Invalid or out of range "
312 "(1..8192) argument to -b");
313 }
314 bsdtar->bytes_per_block = 512 * t;
315 /* Explicit -b forces last block size. */
316 bsdtar->bytes_in_last_block = bsdtar->bytes_per_block;
317 break;
318 case OPTION_B64ENCODE:
319 if (compression2 != '\0')
320 lafe_errc(1, 0,
321 "Can't specify both --uuencode and "
322 "--b64encode");
323 compression2 = opt;
324 compression2_name = "b64encode";
325 break;
326 case 'C': /* GNU tar */
327 if (strlen(bsdtar->argument) == 0)
328 lafe_errc(1, 0,
329 "Meaningless option: -C ''");
330
331 set_chdir(bsdtar, bsdtar->argument);
332 break;
333 case 'c': /* SUSv2 */
334 set_mode(bsdtar, opt);
335 break;
336 case OPTION_CHECK_LINKS: /* GNU tar */
337 bsdtar->flags |= OPTFLAG_WARN_LINKS;
338 break;
339 case OPTION_CHROOT: /* NetBSD */
340 bsdtar->flags |= OPTFLAG_CHROOT;
341 break;
342 case OPTION_CLEAR_NOCHANGE_FFLAGS:
343 bsdtar->extract_flags |=
344 ARCHIVE_EXTRACT_CLEAR_NOCHANGE_FFLAGS;
345 break;
346 case OPTION_EXCLUDE: /* GNU tar */
347 if (archive_match_exclude_pattern(
348 bsdtar->matching, bsdtar->argument) != ARCHIVE_OK)
349 lafe_errc(1, 0,
350 "Couldn't exclude %s\n", bsdtar->argument);
351 break;
352 case OPTION_EXCLUDE_VCS: /* GNU tar */
353 for(t=0; vcs_files[t]; t++) {
354 if (archive_match_exclude_pattern(
355 bsdtar->matching,
356 vcs_files[t]) != ARCHIVE_OK)
357 lafe_errc(1, 0, "Couldn't "
358 "exclude %s\n", vcs_files[t]);
359 }
360 break;
361 case OPTION_FFLAGS:
362 bsdtar->extract_flags |= ARCHIVE_EXTRACT_FFLAGS;
363 bsdtar->readdisk_flags &= ~ARCHIVE_READDISK_NO_FFLAGS;
364 bsdtar->flags |= OPTFLAG_FFLAGS;
365 break;
366 case OPTION_FORMAT: /* GNU tar, others */
367 cset_set_format(bsdtar->cset, bsdtar->argument);
368 break;
369 case 'f': /* SUSv2 */
370 bsdtar->filename = bsdtar->argument;
371 break;
372 case OPTION_GID: /* cpio */
373 errno = 0;
374 tptr = NULL;
375 t = (int)strtol(bsdtar->argument, &tptr, 10);
376 if (errno || t < 0 || *(bsdtar->argument) == '\0' ||
377 tptr == NULL || *tptr != '\0') {
378 lafe_errc(1, 0, "Invalid argument to --gid");
379 }
380 bsdtar->gid = t;
381 break;
382 case OPTION_GNAME: /* cpio */
383 bsdtar->gname = bsdtar->argument;
384 break;
385 case OPTION_GRZIP:
386 if (compression != '\0')
387 lafe_errc(1, 0,
388 "Can't specify both -%c and -%c", opt,
389 compression);
390 compression = opt;
391 compression_name = "grzip";
392 break;
393 case 'H': /* BSD convention */
394 bsdtar->symlink_mode = 'H';
395 break;
396 case 'h': /* Linux Standards Base, gtar; synonym for -L */
397 bsdtar->symlink_mode = 'L';
398 /* Hack: -h by itself is the "help" command. */
399 possible_help_request = 1;
400 break;
401 case OPTION_HELP: /* GNU tar, others */
402 long_help();
403 exit(0);
404 break;
405 case OPTION_HFS_COMPRESSION: /* Mac OS X v10.6 or later */
406 bsdtar->extract_flags |=
407 ARCHIVE_EXTRACT_HFS_COMPRESSION_FORCED;
408 break;
409 case OPTION_IGNORE_ZEROS:
410 bsdtar->flags |= OPTFLAG_IGNORE_ZEROS;
411 break;
412 case 'I': /* GNU tar */
413 /*
414 * TODO: Allow 'names' to come from an archive,
415 * not just a text file. Design a good UI for
416 * allowing names and mode/owner to be read
417 * from an archive, with contents coming from
418 * disk. This can be used to "refresh" an
419 * archive or to design archives with special
420 * permissions without having to create those
421 * permissions on disk.
422 */
423 bsdtar->names_from_file = bsdtar->argument;
424 break;
425 case OPTION_INCLUDE:
426 /*
427 * No one else has the @archive extension, so
428 * no one else needs this to filter entries
429 * when transforming archives.
430 */
431 if (archive_match_include_pattern(bsdtar->matching,
432 bsdtar->argument) != ARCHIVE_OK)
433 lafe_errc(1, 0,
434 "Failed to add %s to inclusion list",
435 bsdtar->argument);
436 break;
437 case 'j': /* GNU tar */
438 if (compression != '\0')
439 lafe_errc(1, 0,
440 "Can't specify both -%c and -%c", opt,
441 compression);
442 compression = opt;
443 compression_name = "bzip2";
444 break;
445 case 'J': /* GNU tar 1.21 and later */
446 if (compression != '\0')
447 lafe_errc(1, 0,
448 "Can't specify both -%c and -%c", opt,
449 compression);
450 compression = opt;
451 compression_name = "xz";
452 break;
453 case 'k': /* GNU tar */
454 bsdtar->extract_flags |= ARCHIVE_EXTRACT_NO_OVERWRITE;
455 break;
456 case OPTION_KEEP_NEWER_FILES: /* GNU tar */
457 bsdtar->extract_flags |= ARCHIVE_EXTRACT_NO_OVERWRITE_NEWER;
458 break;
459 case 'L': /* BSD convention */
460 bsdtar->symlink_mode = 'L';
461 break;
462 case 'l': /* SUSv2 and GNU tar beginning with 1.16 */
463 /* GNU tar 1.13 used -l for --one-file-system */
464 bsdtar->flags |= OPTFLAG_WARN_LINKS;
465 break;
466 case OPTION_LRZIP:
467 case OPTION_LZ4:
468 case OPTION_LZIP: /* GNU tar beginning with 1.23 */
469 case OPTION_LZMA: /* GNU tar beginning with 1.20 */
470 case OPTION_LZOP: /* GNU tar beginning with 1.21 */
471 case OPTION_ZSTD:
472 if (compression != '\0')
473 lafe_errc(1, 0,
474 "Can't specify both -%c and -%c", opt,
475 compression);
476 compression = opt;
477 switch (opt) {
478 case OPTION_LRZIP: compression_name = "lrzip"; break;
479 case OPTION_LZ4: compression_name = "lz4"; break;
480 case OPTION_LZIP: compression_name = "lzip"; break;
481 case OPTION_LZMA: compression_name = "lzma"; break;
482 case OPTION_LZOP: compression_name = "lzop"; break;
483 case OPTION_ZSTD: compression_name = "zstd"; break;
484 }
485 break;
486 case 'm': /* SUSv2 */
487 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_TIME;
488 break;
489 case OPTION_MAC_METADATA: /* Mac OS X */
490 bsdtar->readdisk_flags |= ARCHIVE_READDISK_MAC_COPYFILE;
491 bsdtar->extract_flags |= ARCHIVE_EXTRACT_MAC_METADATA;
492 bsdtar->flags |= OPTFLAG_MAC_METADATA;
493 break;
494 case 'n': /* GNU tar */
495 bsdtar->flags |= OPTFLAG_NO_SUBDIRS;
496 break;
497 /*
498 * Selecting files by time:
499 * --newer-?time='date' Only files newer than 'date'
500 * --newer-?time-than='file' Only files newer than time
501 * on specified file (useful for incremental backups)
502 */
503 case OPTION_NEWER_CTIME: /* GNU tar */
504 if (archive_match_include_date(bsdtar->matching,
505 ARCHIVE_MATCH_CTIME | ARCHIVE_MATCH_NEWER,
506 bsdtar->argument) != ARCHIVE_OK)
507 lafe_errc(1, 0, "Error : %s",
508 archive_error_string(bsdtar->matching));
509 break;
510 case OPTION_NEWER_CTIME_THAN:
511 if (archive_match_include_file_time(bsdtar->matching,
512 ARCHIVE_MATCH_CTIME | ARCHIVE_MATCH_NEWER,
513 bsdtar->argument) != ARCHIVE_OK)
514 lafe_errc(1, 0, "Error : %s",
515 archive_error_string(bsdtar->matching));
516 break;
517 case OPTION_NEWER_MTIME: /* GNU tar */
518 if (archive_match_include_date(bsdtar->matching,
519 ARCHIVE_MATCH_MTIME | ARCHIVE_MATCH_NEWER,
520 bsdtar->argument) != ARCHIVE_OK)
521 lafe_errc(1, 0, "Error : %s",
522 archive_error_string(bsdtar->matching));
523 break;
524 case OPTION_NEWER_MTIME_THAN:
525 if (archive_match_include_file_time(bsdtar->matching,
526 ARCHIVE_MATCH_MTIME | ARCHIVE_MATCH_NEWER,
527 bsdtar->argument) != ARCHIVE_OK)
528 lafe_errc(1, 0, "Error : %s",
529 archive_error_string(bsdtar->matching));
530 break;
531 case OPTION_NODUMP: /* star */
532 bsdtar->readdisk_flags |= ARCHIVE_READDISK_HONOR_NODUMP;
533 break;
534 case OPTION_NOPRESERVE_HFS_COMPRESSION:
535 /* Mac OS X v10.6 or later */
536 bsdtar->extract_flags |=
537 ARCHIVE_EXTRACT_NO_HFS_COMPRESSION;
538 break;
539 case OPTION_NO_ACLS: /* GNU tar */
540 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_ACL;
541 bsdtar->readdisk_flags |= ARCHIVE_READDISK_NO_ACL;
542 bsdtar->flags |= OPTFLAG_NO_ACLS;
543 break;
544 case OPTION_NO_FFLAGS:
545 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_FFLAGS;
546 bsdtar->readdisk_flags |= ARCHIVE_READDISK_NO_FFLAGS;
547 bsdtar->flags |= OPTFLAG_NO_FFLAGS;
548 break;
549 case OPTION_NO_MAC_METADATA: /* Mac OS X */
550 bsdtar->readdisk_flags &= ~ARCHIVE_READDISK_MAC_COPYFILE;
551 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_MAC_METADATA;
552 bsdtar->flags |= OPTFLAG_NO_MAC_METADATA;
553 break;
554 case OPTION_NO_READ_SPARSE:
555 bsdtar->readdisk_flags |= ARCHIVE_READDISK_NO_SPARSE;
556 bsdtar->flags |= OPTFLAG_NO_READ_SPARSE;
557 break;
558 case OPTION_NO_SAFE_WRITES:
559 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_SAFE_WRITES;
560 break;
561 case OPTION_NO_SAME_OWNER: /* GNU tar */
562 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_OWNER;
563 break;
564 case OPTION_NO_SAME_PERMISSIONS: /* GNU tar */
565 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_PERM;
566 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_ACL;
567 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_XATTR;
568 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_FFLAGS;
569 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_MAC_METADATA;
570 break;
571 case OPTION_NO_XATTRS: /* GNU tar */
572 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_XATTR;
573 bsdtar->readdisk_flags |= ARCHIVE_READDISK_NO_XATTR;
574 bsdtar->flags |= OPTFLAG_NO_XATTRS;
575 break;
576 case OPTION_NULL: /* GNU tar */
577 bsdtar->flags |= OPTFLAG_NULL;
578 break;
579 case OPTION_NUMERIC_OWNER: /* GNU tar */
580 bsdtar->uname = "";
581 bsdtar->gname = "";
582 bsdtar->flags |= OPTFLAG_NUMERIC_OWNER;
583 break;
584 case 'O': /* GNU tar */
585 bsdtar->flags |= OPTFLAG_STDOUT;
586 break;
587 case 'o': /* SUSv2 and GNU conflict here, but not fatally */
588 bsdtar->flags |= OPTFLAG_O;
589 break;
590 /*
591 * Selecting files by time:
592 * --older-?time='date' Only files older than 'date'
593 * --older-?time-than='file' Only files older than time
594 * on specified file
595 */
596 case OPTION_OLDER_CTIME:
597 if (archive_match_include_date(bsdtar->matching,
598 ARCHIVE_MATCH_CTIME | ARCHIVE_MATCH_OLDER,
599 bsdtar->argument) != ARCHIVE_OK)
600 lafe_errc(1, 0, "Error : %s",
601 archive_error_string(bsdtar->matching));
602 break;
603 case OPTION_OLDER_CTIME_THAN:
604 if (archive_match_include_file_time(bsdtar->matching,
605 ARCHIVE_MATCH_CTIME | ARCHIVE_MATCH_OLDER,
606 bsdtar->argument) != ARCHIVE_OK)
607 lafe_errc(1, 0, "Error : %s",
608 archive_error_string(bsdtar->matching));
609 break;
610 case OPTION_OLDER_MTIME:
611 if (archive_match_include_date(bsdtar->matching,
612 ARCHIVE_MATCH_MTIME | ARCHIVE_MATCH_OLDER,
613 bsdtar->argument) != ARCHIVE_OK)
614 lafe_errc(1, 0, "Error : %s",
615 archive_error_string(bsdtar->matching));
616 break;
617 case OPTION_OLDER_MTIME_THAN:
618 if (archive_match_include_file_time(bsdtar->matching,
619 ARCHIVE_MATCH_MTIME | ARCHIVE_MATCH_OLDER,
620 bsdtar->argument) != ARCHIVE_OK)
621 lafe_errc(1, 0, "Error : %s",
622 archive_error_string(bsdtar->matching));
623 break;
624 case OPTION_ONE_FILE_SYSTEM: /* GNU tar */
625 bsdtar->readdisk_flags |=
626 ARCHIVE_READDISK_NO_TRAVERSE_MOUNTS;
627 break;
628 case OPTION_OPTIONS:
629 bsdtar->option_options = bsdtar->argument;
630 break;
631 #if 0
632 /*
633 * The common BSD -P option is not necessary, since
634 * our default is to archive symlinks, not follow
635 * them. This is convenient, as -P conflicts with GNU
636 * tar anyway.
637 */
638 case 'P': /* BSD convention */
639 /* Default behavior, no option necessary. */
640 break;
641 #endif
642 case 'P': /* GNU tar */
643 bsdtar->extract_flags &= ~SECURITY;
644 bsdtar->flags |= OPTFLAG_ABSOLUTE_PATHS;
645 break;
646 case 'p': /* GNU tar, star */
647 bsdtar->extract_flags |= ARCHIVE_EXTRACT_PERM;
648 bsdtar->extract_flags |= ARCHIVE_EXTRACT_ACL;
649 bsdtar->extract_flags |= ARCHIVE_EXTRACT_XATTR;
650 bsdtar->extract_flags |= ARCHIVE_EXTRACT_FFLAGS;
651 bsdtar->extract_flags |= ARCHIVE_EXTRACT_MAC_METADATA;
652 break;
653 case OPTION_PASSPHRASE:
654 bsdtar->passphrase = bsdtar->argument;
655 break;
656 case OPTION_POSIX: /* GNU tar */
657 cset_set_format(bsdtar->cset, "pax");
658 break;
659 case 'q': /* FreeBSD GNU tar --fast-read, NetBSD -q */
660 bsdtar->flags |= OPTFLAG_FAST_READ;
661 break;
662 case 'r': /* SUSv2 */
663 set_mode(bsdtar, opt);
664 break;
665 case OPTION_READ_SPARSE:
666 bsdtar->readdisk_flags &= ~ARCHIVE_READDISK_NO_SPARSE;
667 bsdtar->flags |= OPTFLAG_READ_SPARSE;
668 break;
669 case 'S': /* NetBSD pax-as-tar */
670 bsdtar->extract_flags |= ARCHIVE_EXTRACT_SPARSE;
671 break;
672 case 's': /* NetBSD pax-as-tar */
673 #if defined(HAVE_REGEX_H) || defined(HAVE_PCREPOSIX_H)
674 add_substitution(bsdtar, bsdtar->argument);
675 #else
676 lafe_warnc(0,
677 "-s is not supported by this version of bsdtar");
678 usage();
679 #endif
680 break;
681 case OPTION_SAFE_WRITES:
682 bsdtar->extract_flags |= ARCHIVE_EXTRACT_SAFE_WRITES;
683 break;
684 case OPTION_SAME_OWNER: /* GNU tar */
685 bsdtar->extract_flags |= ARCHIVE_EXTRACT_OWNER;
686 break;
687 case OPTION_STRIP_COMPONENTS: /* GNU tar 1.15 */
688 errno = 0;
689 tptr = NULL;
690 t = (int)strtol(bsdtar->argument, &tptr, 10);
691 if (errno || t < 0 || *(bsdtar->argument) == '\0' ||
692 tptr == NULL || *tptr != '\0') {
693 lafe_errc(1, 0, "Invalid argument to "
694 "--strip-components");
695 }
696 bsdtar->strip_components = t;
697 break;
698 case 'T': /* GNU tar */
699 bsdtar->names_from_file = bsdtar->argument;
700 break;
701 case 't': /* SUSv2 */
702 set_mode(bsdtar, opt);
703 bsdtar->verbose++;
704 break;
705 case OPTION_TOTALS: /* GNU tar */
706 bsdtar->flags |= OPTFLAG_TOTALS;
707 break;
708 case 'U': /* GNU tar */
709 bsdtar->extract_flags |= ARCHIVE_EXTRACT_UNLINK;
710 bsdtar->flags |= OPTFLAG_UNLINK_FIRST;
711 break;
712 case 'u': /* SUSv2 */
713 set_mode(bsdtar, opt);
714 break;
715 case OPTION_UID: /* cpio */
716 errno = 0;
717 tptr = NULL;
718 t = (int)strtol(bsdtar->argument, &tptr, 10);
719 if (errno || t < 0 || *(bsdtar->argument) == '\0' ||
720 tptr == NULL || *tptr != '\0') {
721 lafe_errc(1, 0, "Invalid argument to --uid");
722 }
723 bsdtar->uid = t;
724 break;
725 case OPTION_UNAME: /* cpio */
726 bsdtar->uname = bsdtar->argument;
727 break;
728 case OPTION_UUENCODE:
729 if (compression2 != '\0')
730 lafe_errc(1, 0,
731 "Can't specify both --uuencode and "
732 "--b64encode");
733 compression2 = opt;
734 compression2_name = "uuencode";
735 break;
736 case 'v': /* SUSv2 */
737 bsdtar->verbose++;
738 break;
739 case OPTION_VERSION: /* GNU convention */
740 version();
741 break;
742 #if 0
743 /*
744 * The -W longopt feature is handled inside of
745 * bsdtar_getopt(), so -W is not available here.
746 */
747 case 'W': /* Obscure GNU convention. */
748 break;
749 #endif
750 case 'w': /* SUSv2 */
751 bsdtar->flags |= OPTFLAG_INTERACTIVE;
752 break;
753 case 'X': /* GNU tar */
754 if (archive_match_exclude_pattern_from_file(
755 bsdtar->matching, bsdtar->argument, 0)
756 != ARCHIVE_OK)
757 lafe_errc(1, 0, "Error : %s",
758 archive_error_string(bsdtar->matching));
759 break;
760 case 'x': /* SUSv2 */
761 set_mode(bsdtar, opt);
762 break;
763 case OPTION_XATTRS: /* GNU tar */
764 bsdtar->extract_flags |= ARCHIVE_EXTRACT_XATTR;
765 bsdtar->readdisk_flags &= ~ARCHIVE_READDISK_NO_XATTR;
766 bsdtar->flags |= OPTFLAG_XATTRS;
767 break;
768 case 'y': /* FreeBSD version of GNU tar */
769 if (compression != '\0')
770 lafe_errc(1, 0,
771 "Can't specify both -%c and -%c", opt,
772 compression);
773 compression = opt;
774 compression_name = "bzip2";
775 break;
776 case 'Z': /* GNU tar */
777 if (compression != '\0')
778 lafe_errc(1, 0,
779 "Can't specify both -%c and -%c", opt,
780 compression);
781 compression = opt;
782 compression_name = "compress";
783 break;
784 case 'z': /* GNU tar, star, many others */
785 if (compression != '\0')
786 lafe_errc(1, 0,
787 "Can't specify both -%c and -%c", opt,
788 compression);
789 compression = opt;
790 compression_name = "gzip";
791 break;
792 case OPTION_USE_COMPRESS_PROGRAM:
793 compress_program = bsdtar->argument;
794 break;
795 default:
796 usage();
797 }
798 }
799
800 /*
801 * Sanity-check options.
802 */
803
804 /* If no "real" mode was specified, treat -h as --help. */
805 if ((bsdtar->mode == '\0') && possible_help_request) {
806 long_help();
807 exit(0);
808 }
809
810 /* Otherwise, a mode is required. */
811 if (bsdtar->mode == '\0')
812 lafe_errc(1, 0,
813 "Must specify one of -c, -r, -t, -u, -x");
814
815 /* Check boolean options only permitted in certain modes. */
816 if (bsdtar->flags & OPTFLAG_AUTO_COMPRESS) {
817 only_mode(bsdtar, "-a", "cx");
818 if (bsdtar->mode == 'x') {
819 bsdtar->flags &= ~OPTFLAG_AUTO_COMPRESS;
820 lafe_warnc(0,
821 "Ignoring option -a in mode -x");
822 }
823 }
824 if (bsdtar->readdisk_flags & ARCHIVE_READDISK_NO_TRAVERSE_MOUNTS)
825 only_mode(bsdtar, "--one-file-system", "cru");
826 if (bsdtar->flags & OPTFLAG_FAST_READ)
827 only_mode(bsdtar, "--fast-read", "xt");
828 if (bsdtar->extract_flags & ARCHIVE_EXTRACT_HFS_COMPRESSION_FORCED)
829 only_mode(bsdtar, "--hfsCompression", "x");
830 if (bsdtar->extract_flags & ARCHIVE_EXTRACT_NO_HFS_COMPRESSION)
831 only_mode(bsdtar, "--nopreserveHFSCompression", "x");
832 if (bsdtar->readdisk_flags & ARCHIVE_READDISK_HONOR_NODUMP)
833 only_mode(bsdtar, "--nodump", "cru");
834 if (bsdtar->flags & OPTFLAG_ACLS)
835 only_mode(bsdtar, "--acls", "crux");
836 if (bsdtar->flags & OPTFLAG_NO_ACLS)
837 only_mode(bsdtar, "--no-acls", "crux");
838 if (bsdtar->flags & OPTFLAG_XATTRS)
839 only_mode(bsdtar, "--xattrs", "crux");
840 if (bsdtar->flags & OPTFLAG_NO_XATTRS)
841 only_mode(bsdtar, "--no-xattrs", "crux");
842 if (bsdtar->flags & OPTFLAG_FFLAGS)
843 only_mode(bsdtar, "--fflags", "crux");
844 if (bsdtar->flags & OPTFLAG_NO_FFLAGS)
845 only_mode(bsdtar, "--no-fflags", "crux");
846 if (bsdtar->flags & OPTFLAG_MAC_METADATA)
847 only_mode(bsdtar, "--mac-metadata", "crux");
848 if (bsdtar->flags & OPTFLAG_NO_MAC_METADATA)
849 only_mode(bsdtar, "--no-mac-metadata", "crux");
850 if (bsdtar->flags & OPTFLAG_O) {
851 switch (bsdtar->mode) {
852 case 'c':
853 /*
854 * In GNU tar, -o means "old format." The
855 * "ustar" format is the closest thing
856 * supported by libarchive.
857 */
858 cset_set_format(bsdtar->cset, "ustar");
859 /* TODO: bsdtar->create_format = "v7"; */
860 break;
861 case 'x':
862 /* POSIX-compatible behavior. */
863 bsdtar->flags |= OPTFLAG_NO_OWNER;
864 bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_OWNER;
865 break;
866 default:
867 only_mode(bsdtar, "-o", "xc");
868 break;
869 }
870 }
871 if (bsdtar->flags & OPTFLAG_STDOUT)
872 only_mode(bsdtar, "-O", "xt");
873 if (bsdtar->flags & OPTFLAG_UNLINK_FIRST)
874 only_mode(bsdtar, "-U", "x");
875 if (bsdtar->flags & OPTFLAG_WARN_LINKS)
876 only_mode(bsdtar, "--check-links", "cr");
877
878 if ((bsdtar->flags & OPTFLAG_AUTO_COMPRESS) &&
879 cset_auto_compress(bsdtar->cset, bsdtar->filename)) {
880 /* Ignore specified compressions if auto-compress works. */
881 compression = '\0';
882 compression2 = '\0';
883 }
884 /* Check other parameters only permitted in certain modes. */
885 if (compress_program != NULL) {
886 only_mode(bsdtar, "--use-compress-program", "cxt");
887 cset_add_filter_program(bsdtar->cset, compress_program);
888 /* Ignore specified compressions. */
889 compression = '\0';
890 compression2 = '\0';
891 }
892 if (compression != '\0') {
893 switch (compression) {
894 case 'J': case 'j': case 'y': case 'Z': case 'z':
895 strcpy(buff, "-?");
896 buff[1] = compression;
897 break;
898 default:
899 strcpy(buff, "--");
900 strcat(buff, compression_name);
901 break;
902 }
903 only_mode(bsdtar, buff, "cxt");
904 cset_add_filter(bsdtar->cset, compression_name);
905 }
906 if (compression2 != '\0') {
907 strcpy(buff, "--");
908 strcat(buff, compression2_name);
909 only_mode(bsdtar, buff, "cxt");
910 cset_add_filter(bsdtar->cset, compression2_name);
911 }
912 if (cset_get_format(bsdtar->cset) != NULL)
913 only_mode(bsdtar, "--format", "cru");
914 if (bsdtar->symlink_mode != '\0') {
915 strcpy(buff, "-?");
916 buff[1] = bsdtar->symlink_mode;
917 only_mode(bsdtar, buff, "cru");
918 }
919
920 /*
921 * When creating an archive from a directory tree, the directory
922 * walking code will already avoid entering directories when
923 * recursive inclusion of directory content is disabled, therefore
924 * changing the matching behavior has no effect for creation modes.
925 * It is relevant for extraction or listing.
926 */
927 archive_match_set_inclusion_recursion(bsdtar->matching,
928 !(bsdtar->flags & OPTFLAG_NO_SUBDIRS));
929
930 /* Filename "-" implies stdio. */
931 if (strcmp(bsdtar->filename, "-") == 0)
932 bsdtar->filename = NULL;
933
934 switch(bsdtar->mode) {
935 case 'c':
936 tar_mode_c(bsdtar);
937 break;
938 case 'r':
939 tar_mode_r(bsdtar);
940 break;
941 case 't':
942 tar_mode_t(bsdtar);
943 break;
944 case 'u':
945 tar_mode_u(bsdtar);
946 break;
947 case 'x':
948 tar_mode_x(bsdtar);
949 break;
950 }
951
952 archive_match_free(bsdtar->matching);
953 #if defined(HAVE_REGEX_H) || defined(HAVE_PCREPOSIX_H)
954 cleanup_substitution(bsdtar);
955 #endif
956 cset_free(bsdtar->cset);
957 passphrase_free(bsdtar->ppbuff);
958
959 if (bsdtar->return_value != 0)
960 lafe_warnc(0,
961 "Error exit delayed from previous errors.");
962 return (bsdtar->return_value);
963 }
964
965 static void
set_mode(struct bsdtar * bsdtar,char opt)966 set_mode(struct bsdtar *bsdtar, char opt)
967 {
968 if (bsdtar->mode != '\0' && bsdtar->mode != opt)
969 lafe_errc(1, 0,
970 "Can't specify both -%c and -%c", opt, bsdtar->mode);
971 bsdtar->mode = opt;
972 }
973
974 /*
975 * Verify that the mode is correct.
976 */
977 static void
only_mode(struct bsdtar * bsdtar,const char * opt,const char * valid_modes)978 only_mode(struct bsdtar *bsdtar, const char *opt, const char *valid_modes)
979 {
980 if (strchr(valid_modes, bsdtar->mode) == NULL)
981 lafe_errc(1, 0,
982 "Option %s is not permitted in mode -%c",
983 opt, bsdtar->mode);
984 }
985
986
987 void
usage(void)988 usage(void)
989 {
990 const char *p;
991
992 p = lafe_getprogname();
993
994 fprintf(stderr, "Usage:\n");
995 fprintf(stderr, " List: %s -tf <archive-filename>\n", p);
996 fprintf(stderr, " Extract: %s -xf <archive-filename>\n", p);
997 fprintf(stderr, " Create: %s -cf <archive-filename> [filenames...]\n", p);
998 fprintf(stderr, " Help: %s --help\n", p);
999 exit(1);
1000 }
1001
1002 static void
version(void)1003 version(void)
1004 {
1005 printf("bsdtar %s - %s \n",
1006 BSDTAR_VERSION_STRING,
1007 archive_version_details());
1008 exit(0);
1009 }
1010
1011 static const char *long_help_msg =
1012 "First option must be a mode specifier:\n"
1013 " -c Create -r Add/Replace -t List -u Update -x Extract\n"
1014 "Common Options:\n"
1015 " -b # Use # 512-byte records per I/O block\n"
1016 " -f <filename> Location of archive (default " _PATH_DEFTAPE ")\n"
1017 " -v Verbose\n"
1018 " -w Interactive\n"
1019 "Create: %p -c [options] [<file> | <dir> | @<archive> | -C <dir> ]\n"
1020 " <file>, <dir> add these items to archive\n"
1021 " -z, -j, -J, --lzma Compress archive with gzip/bzip2/xz/lzma\n"
1022 " --format {ustar|pax|cpio|shar} Select archive format\n"
1023 " --exclude <pattern> Skip files that match pattern\n"
1024 " -C <dir> Change to <dir> before processing remaining files\n"
1025 " @<archive> Add entries from <archive> to output\n"
1026 "List: %p -t [options] [<patterns>]\n"
1027 " <patterns> If specified, list only entries that match\n"
1028 "Extract: %p -x [options] [<patterns>]\n"
1029 " <patterns> If specified, extract only entries that match\n"
1030 " -k Keep (don't overwrite) existing files\n"
1031 " -m Don't restore modification times\n"
1032 " -O Write entries to stdout, don't restore to disk\n"
1033 " -p Restore permissions (including ACLs, owner, file flags)\n";
1034
1035
1036 /*
1037 * Note that the word 'bsdtar' will always appear in the first line
1038 * of output.
1039 *
1040 * In particular, /bin/sh scripts that need to test for the presence
1041 * of bsdtar can use the following template:
1042 *
1043 * if (tar --help 2>&1 | grep bsdtar >/dev/null 2>&1 ) then \
1044 * echo bsdtar; else echo not bsdtar; fi
1045 */
1046 static void
long_help(void)1047 long_help(void)
1048 {
1049 const char *prog;
1050 const char *p;
1051
1052 prog = lafe_getprogname();
1053
1054 fflush(stderr);
1055
1056 p = (strcmp(prog,"bsdtar") != 0) ? "(bsdtar)" : "";
1057 printf("%s%s: manipulate archive files\n", prog, p);
1058
1059 for (p = long_help_msg; *p != '\0'; p++) {
1060 if (*p == '%') {
1061 if (p[1] == 'p') {
1062 fputs(prog, stdout);
1063 p++;
1064 } else
1065 putchar('%');
1066 } else
1067 putchar(*p);
1068 }
1069 version();
1070 }
1071