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* src/common.h (check_device_option): New global.
[chaz/tar] / src / tar.c
1 /* A tar (tape archiver) program.
2
3 Copyright (C) 1988, 1992, 1993, 1994, 1995, 1996, 1997, 1999, 2000,
4 2001, 2003, 2004, 2005, 2006, 2007 Free Software Foundation, Inc.
5
6 Written by John Gilmore, starting 1985-08-25.
7
8 This program is free software; you can redistribute it and/or modify it
9 under the terms of the GNU General Public License as published by the
10 Free Software Foundation; either version 3, or (at your option) any later
11 version.
12
13 This program is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
16 Public License for more details.
17
18 You should have received a copy of the GNU General Public License along
19 with this program; if not, write to the Free Software Foundation, Inc.,
20 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
21
22 #include <system.h>
23
24 #include <fnmatch.h>
25 #include <argp.h>
26 #include <argp-namefrob.h>
27 #include <argp-fmtstream.h>
28
29 #include <signal.h>
30 #if ! defined SIGCHLD && defined SIGCLD
31 # define SIGCHLD SIGCLD
32 #endif
33
34 /* The following causes "common.h" to produce definitions of all the global
35 variables, rather than just "extern" declarations of them. GNU tar does
36 depend on the system loader to preset all GLOBAL variables to neutral (or
37 zero) values; explicit initialization is usually not done. */
38 #define GLOBAL
39 #include "common.h"
40
41 #include <argmatch.h>
42 #include <closeout.h>
43 #include <configmake.h>
44 #include <exitfail.h>
45 #include <getdate.h>
46 #include <rmt.h>
47 #include <rmt-command.h>
48 #include <prepargs.h>
49 #include <quotearg.h>
50 #include <version-etc.h>
51 #include <xstrtol.h>
52 #include <stdopen.h>
53
54 /* Local declarations. */
55
56 #ifndef DEFAULT_ARCHIVE_FORMAT
57 # define DEFAULT_ARCHIVE_FORMAT GNU_FORMAT
58 #endif
59
60 #ifndef DEFAULT_ARCHIVE
61 # define DEFAULT_ARCHIVE "tar.out"
62 #endif
63
64 #ifndef DEFAULT_BLOCKING
65 # define DEFAULT_BLOCKING 20
66 #endif
67
68 \f
69 /* Miscellaneous. */
70
71 /* Name of option using stdin. */
72 static const char *stdin_used_by;
73
74 /* Doesn't return if stdin already requested. */
75 void
76 request_stdin (const char *option)
77 {
78 if (stdin_used_by)
79 USAGE_ERROR ((0, 0, _("Options `-%s' and `-%s' both want standard input"),
80 stdin_used_by, option));
81
82 stdin_used_by = option;
83 }
84
85 extern int rpmatch (char const *response);
86
87 /* Returns true if and only if the user typed an affirmative response. */
88 int
89 confirm (const char *message_action, const char *message_name)
90 {
91 static FILE *confirm_file;
92 static int confirm_file_EOF;
93 bool status = false;
94
95 if (!confirm_file)
96 {
97 if (archive == 0 || stdin_used_by)
98 {
99 confirm_file = fopen (TTY_NAME, "r");
100 if (! confirm_file)
101 open_fatal (TTY_NAME);
102 }
103 else
104 {
105 request_stdin ("-w");
106 confirm_file = stdin;
107 }
108 }
109
110 fprintf (stdlis, "%s %s?", message_action, quote (message_name));
111 fflush (stdlis);
112
113 if (!confirm_file_EOF)
114 {
115 char *response = NULL;
116 size_t response_size = 0;
117 if (getline (&response, &response_size, confirm_file) < 0)
118 confirm_file_EOF = 1;
119 else
120 status = rpmatch (response) > 0;
121 free (response);
122 }
123
124 if (confirm_file_EOF)
125 {
126 fputc ('\n', stdlis);
127 fflush (stdlis);
128 }
129
130 return status;
131 }
132
133 static struct fmttab {
134 char const *name;
135 enum archive_format fmt;
136 } const fmttab[] = {
137 { "v7", V7_FORMAT },
138 { "oldgnu", OLDGNU_FORMAT },
139 { "ustar", USTAR_FORMAT },
140 { "posix", POSIX_FORMAT },
141 #if 0 /* not fully supported yet */
142 { "star", STAR_FORMAT },
143 #endif
144 { "gnu", GNU_FORMAT },
145 { "pax", POSIX_FORMAT }, /* An alias for posix */
146 { NULL, 0 }
147 };
148
149 static void
150 set_archive_format (char const *name)
151 {
152 struct fmttab const *p;
153
154 for (p = fmttab; strcmp (p->name, name) != 0; )
155 if (! (++p)->name)
156 USAGE_ERROR ((0, 0, _("%s: Invalid archive format"),
157 quotearg_colon (name)));
158
159 archive_format = p->fmt;
160 }
161
162 const char *
163 archive_format_string (enum archive_format fmt)
164 {
165 struct fmttab const *p;
166
167 for (p = fmttab; p->name; p++)
168 if (p->fmt == fmt)
169 return p->name;
170 return "unknown?";
171 }
172
173 #define FORMAT_MASK(n) (1<<(n))
174
175 static void
176 assert_format(unsigned fmt_mask)
177 {
178 if ((FORMAT_MASK (archive_format) & fmt_mask) == 0)
179 USAGE_ERROR ((0, 0,
180 _("GNU features wanted on incompatible archive format")));
181 }
182
183 const char *
184 subcommand_string (enum subcommand c)
185 {
186 switch (c)
187 {
188 case UNKNOWN_SUBCOMMAND:
189 return "unknown?";
190
191 case APPEND_SUBCOMMAND:
192 return "-r";
193
194 case CAT_SUBCOMMAND:
195 return "-A";
196
197 case CREATE_SUBCOMMAND:
198 return "-c";
199
200 case DELETE_SUBCOMMAND:
201 return "-D";
202
203 case DIFF_SUBCOMMAND:
204 return "-d";
205
206 case EXTRACT_SUBCOMMAND:
207 return "-x";
208
209 case LIST_SUBCOMMAND:
210 return "-t";
211
212 case UPDATE_SUBCOMMAND:
213 return "-u";
214
215 default:
216 abort ();
217 }
218 }
219
220 void
221 tar_list_quoting_styles (argp_fmtstream_t fs, char *prefix)
222 {
223 int i;
224
225 for (i = 0; quoting_style_args[i]; i++)
226 argp_fmtstream_printf (fs, "%s%s\n", prefix, quoting_style_args[i]);
227 }
228
229 void
230 tar_set_quoting_style (char *arg)
231 {
232 int i;
233
234 for (i = 0; quoting_style_args[i]; i++)
235 if (strcmp (arg, quoting_style_args[i]) == 0)
236 {
237 set_quoting_style (NULL, i);
238 return;
239 }
240 FATAL_ERROR ((0, 0,
241 _("Unknown quoting style `%s'. Try `%s --quoting-style=help' to get a list."), arg, program_invocation_short_name));
242 }
243
244 \f
245 /* Options. */
246
247 enum
248 {
249 ANCHORED_OPTION = CHAR_MAX + 1,
250 ATIME_PRESERVE_OPTION,
251 BACKUP_OPTION,
252 CHECK_DEVICE_OPTION,
253 CHECKPOINT_OPTION,
254 CHECKPOINT_ACTION_OPTION,
255 DELAY_DIRECTORY_RESTORE_OPTION,
256 HARD_DEREFERENCE_OPTION,
257 DELETE_OPTION,
258 EXCLUDE_CACHES_OPTION,
259 EXCLUDE_CACHES_UNDER_OPTION,
260 EXCLUDE_CACHES_ALL_OPTION,
261 EXCLUDE_OPTION,
262 EXCLUDE_TAG_OPTION,
263 EXCLUDE_TAG_UNDER_OPTION,
264 EXCLUDE_TAG_ALL_OPTION,
265 EXCLUDE_VCS_OPTION,
266 FORCE_LOCAL_OPTION,
267 GROUP_OPTION,
268 HANG_OPTION,
269 IGNORE_CASE_OPTION,
270 IGNORE_COMMAND_ERROR_OPTION,
271 IGNORE_FAILED_READ_OPTION,
272 INDEX_FILE_OPTION,
273 KEEP_NEWER_FILES_OPTION,
274 LZMA_OPTION,
275 MODE_OPTION,
276 MTIME_OPTION,
277 NEWER_MTIME_OPTION,
278 NO_ANCHORED_OPTION,
279 NO_CHECK_DEVICE_OPTION,
280 NO_DELAY_DIRECTORY_RESTORE_OPTION,
281 NO_IGNORE_CASE_OPTION,
282 NO_IGNORE_COMMAND_ERROR_OPTION,
283 NO_OVERWRITE_DIR_OPTION,
284 NO_QUOTE_CHARS_OPTION,
285 NO_RECURSION_OPTION,
286 NO_SAME_OWNER_OPTION,
287 NO_SAME_PERMISSIONS_OPTION,
288 NO_UNQUOTE_OPTION,
289 NO_WILDCARDS_MATCH_SLASH_OPTION,
290 NO_WILDCARDS_OPTION,
291 NULL_OPTION,
292 NUMERIC_OWNER_OPTION,
293 OCCURRENCE_OPTION,
294 OLD_ARCHIVE_OPTION,
295 ONE_FILE_SYSTEM_OPTION,
296 OVERWRITE_DIR_OPTION,
297 OVERWRITE_OPTION,
298 OWNER_OPTION,
299 PAX_OPTION,
300 POSIX_OPTION,
301 PRESERVE_OPTION,
302 QUOTE_CHARS_OPTION,
303 QUOTING_STYLE_OPTION,
304 RECORD_SIZE_OPTION,
305 RECURSION_OPTION,
306 RECURSIVE_UNLINK_OPTION,
307 REMOVE_FILES_OPTION,
308 RESTRICT_OPTION,
309 RMT_COMMAND_OPTION,
310 RSH_COMMAND_OPTION,
311 SAME_OWNER_OPTION,
312 SHOW_DEFAULTS_OPTION,
313 SHOW_OMITTED_DIRS_OPTION,
314 SHOW_TRANSFORMED_NAMES_OPTION,
315 SPARSE_VERSION_OPTION,
316 STRIP_COMPONENTS_OPTION,
317 SUFFIX_OPTION,
318 TEST_LABEL_OPTION,
319 TOTALS_OPTION,
320 TO_COMMAND_OPTION,
321 TRANSFORM_OPTION,
322 UNQUOTE_OPTION,
323 USAGE_OPTION,
324 USE_COMPRESS_PROGRAM_OPTION,
325 UTC_OPTION,
326 VERSION_OPTION,
327 VOLNO_FILE_OPTION,
328 WILDCARDS_MATCH_SLASH_OPTION,
329 WILDCARDS_OPTION
330 };
331
332 const char *argp_program_version = "tar (" PACKAGE_NAME ") " VERSION;
333 const char *argp_program_bug_address = "<" PACKAGE_BUGREPORT ">";
334 static char const doc[] = N_("\
335 GNU `tar' saves many files together into a single tape or disk archive, \
336 and can restore individual files from the archive.\n\
337 \n\
338 Examples:\n\
339 tar -cf archive.tar foo bar # Create archive.tar from files foo and bar.\n\
340 tar -tvf archive.tar # List all files in archive.tar verbosely.\n\
341 tar -xf archive.tar # Extract all files from archive.tar.\n")
342 "\v"
343 N_("The backup suffix is `~', unless set with --suffix or SIMPLE_BACKUP_SUFFIX.\n\
344 The version control may be set with --backup or VERSION_CONTROL, values are:\n\n\
345 none, off never make backups\n\
346 t, numbered make numbered backups\n\
347 nil, existing numbered if numbered backups exist, simple otherwise\n\
348 never, simple always make simple backups\n");
349
350
351 /* NOTE:
352
353 Available option letters are DEIJQY and eqy. Consider the following
354 assignments:
355
356 [For Solaris tar compatibility =/= Is it important at all?]
357 e exit immediately with a nonzero exit status if unexpected errors occur
358 E use extended headers (--format=posix)
359
360 [q alias for --occurrence=1 =/= this would better be used for quiet?]
361 [I same as T =/= will harm star compatibility]
362
363 y per-file gzip compression
364 Y per-block gzip compression */
365
366 static struct argp_option options[] = {
367 #define GRID 10
368 {NULL, 0, NULL, 0,
369 N_("Main operation mode:"), GRID },
370
371 {"list", 't', 0, 0,
372 N_("list the contents of an archive"), GRID+1 },
373 {"extract", 'x', 0, 0,
374 N_("extract files from an archive"), GRID+1 },
375 {"get", 0, 0, OPTION_ALIAS, NULL, GRID+1 },
376 {"create", 'c', 0, 0,
377 N_("create a new archive"), GRID+1 },
378 {"diff", 'd', 0, 0,
379 N_("find differences between archive and file system"), GRID+1 },
380 {"compare", 0, 0, OPTION_ALIAS, NULL, GRID+1 },
381 {"append", 'r', 0, 0,
382 N_("append files to the end of an archive"), GRID+1 },
383 {"update", 'u', 0, 0,
384 N_("only append files newer than copy in archive"), GRID+1 },
385 {"catenate", 'A', 0, 0,
386 N_("append tar files to an archive"), GRID+1 },
387 {"concatenate", 0, 0, OPTION_ALIAS, NULL, GRID+1 },
388 {"delete", DELETE_OPTION, 0, 0,
389 N_("delete from the archive (not on mag tapes!)"), GRID+1 },
390 {"test-label", TEST_LABEL_OPTION, NULL, 0,
391 N_("test the archive volume label and exit"), GRID+1 },
392 #undef GRID
393
394 #define GRID 20
395 {NULL, 0, NULL, 0,
396 N_("Operation modifiers:"), GRID },
397
398 {"sparse", 'S', 0, 0,
399 N_("handle sparse files efficiently"), GRID+1 },
400 {"sparse-version", SPARSE_VERSION_OPTION, N_("MAJOR[.MINOR]"), 0,
401 N_("set version of the sparse format to use (implies --sparse)"), GRID+1},
402 {"incremental", 'G', 0, 0,
403 N_("handle old GNU-format incremental backup"), GRID+1 },
404 {"listed-incremental", 'g', N_("FILE"), 0,
405 N_("handle new GNU-format incremental backup"), GRID+1 },
406 {"ignore-failed-read", IGNORE_FAILED_READ_OPTION, 0, 0,
407 N_("do not exit with nonzero on unreadable files"), GRID+1 },
408 {"occurrence", OCCURRENCE_OPTION, N_("NUMBER"), OPTION_ARG_OPTIONAL,
409 N_("process only the NUMBERth occurrence of each file in the archive;"
410 " this option is valid only in conjunction with one of the subcommands"
411 " --delete, --diff, --extract or --list and when a list of files"
412 " is given either on the command line or via the -T option;"
413 " NUMBER defaults to 1"), GRID+1 },
414 {"seek", 'n', NULL, 0,
415 N_("archive is seekable"), GRID+1 },
416 {"no-check-device", NO_CHECK_DEVICE_OPTION, NULL, 0,
417 N_("do not check device numbers when creating incremental archives"),
418 GRID+1 },
419 {"check-device", CHECK_DEVICE_OPTION, NULL, 0,
420 N_("check device numbers when creating incremental archives (default)"),
421 GRID+1 },
422 #undef GRID
423
424 #define GRID 30
425 {NULL, 0, NULL, 0,
426 N_("Overwrite control:"), GRID },
427
428 {"verify", 'W', 0, 0,
429 N_("attempt to verify the archive after writing it"), GRID+1 },
430 {"remove-files", REMOVE_FILES_OPTION, 0, 0,
431 N_("remove files after adding them to the archive"), GRID+1 },
432 {"keep-old-files", 'k', 0, 0,
433 N_("don't replace existing files when extracting"), GRID+1 },
434 {"keep-newer-files", KEEP_NEWER_FILES_OPTION, 0, 0,
435 N_("don't replace existing files that are newer than their archive copies"), GRID+1 },
436 {"overwrite", OVERWRITE_OPTION, 0, 0,
437 N_("overwrite existing files when extracting"), GRID+1 },
438 {"unlink-first", 'U', 0, 0,
439 N_("remove each file prior to extracting over it"), GRID+1 },
440 {"recursive-unlink", RECURSIVE_UNLINK_OPTION, 0, 0,
441 N_("empty hierarchies prior to extracting directory"), GRID+1 },
442 {"no-overwrite-dir", NO_OVERWRITE_DIR_OPTION, 0, 0,
443 N_("preserve metadata of existing directories"), GRID+1 },
444 {"overwrite-dir", OVERWRITE_DIR_OPTION, 0, 0,
445 N_("overwrite metadata of existing directories when extracting (default)"),
446 GRID+1 },
447 #undef GRID
448
449 #define GRID 40
450 {NULL, 0, NULL, 0,
451 N_("Select output stream:"), GRID },
452
453 {"to-stdout", 'O', 0, 0,
454 N_("extract files to standard output"), GRID+1 },
455 {"to-command", TO_COMMAND_OPTION, N_("COMMAND"), 0,
456 N_("pipe extracted files to another program"), GRID+1 },
457 {"ignore-command-error", IGNORE_COMMAND_ERROR_OPTION, 0, 0,
458 N_("ignore exit codes of children"), GRID+1 },
459 {"no-ignore-command-error", NO_IGNORE_COMMAND_ERROR_OPTION, 0, 0,
460 N_("treat non-zero exit codes of children as error"), GRID+1 },
461 #undef GRID
462
463 #define GRID 50
464 {NULL, 0, NULL, 0,
465 N_("Handling of file attributes:"), GRID },
466
467 {"owner", OWNER_OPTION, N_("NAME"), 0,
468 N_("force NAME as owner for added files"), GRID+1 },
469 {"group", GROUP_OPTION, N_("NAME"), 0,
470 N_("force NAME as group for added files"), GRID+1 },
471 {"mtime", MTIME_OPTION, N_("DATE-OR-FILE"), 0,
472 N_("set mtime for added files from DATE-OR-FILE"), GRID+1 },
473 {"mode", MODE_OPTION, N_("CHANGES"), 0,
474 N_("force (symbolic) mode CHANGES for added files"), GRID+1 },
475 {"atime-preserve", ATIME_PRESERVE_OPTION,
476 N_("METHOD"), OPTION_ARG_OPTIONAL,
477 N_("preserve access times on dumped files, either by restoring the times"
478 " after reading (METHOD='replace'; default) or by not setting the times"
479 " in the first place (METHOD='system')"), GRID+1 },
480 {"touch", 'm', 0, 0,
481 N_("don't extract file modified time"), GRID+1 },
482 {"same-owner", SAME_OWNER_OPTION, 0, 0,
483 N_("try extracting files with the same ownership"), GRID+1 },
484 {"no-same-owner", NO_SAME_OWNER_OPTION, 0, 0,
485 N_("extract files as yourself"), GRID+1 },
486 {"numeric-owner", NUMERIC_OWNER_OPTION, 0, 0,
487 N_("always use numbers for user/group names"), GRID+1 },
488 {"preserve-permissions", 'p', 0, 0,
489 N_("extract information about file permissions (default for superuser)"),
490 GRID+1 },
491 {"same-permissions", 0, 0, OPTION_ALIAS, NULL, GRID+1 },
492 {"no-same-permissions", NO_SAME_PERMISSIONS_OPTION, 0, 0,
493 N_("apply the user's umask when extracting permissions from the archive (default for ordinary users)"), GRID+1 },
494 {"preserve-order", 's', 0, 0,
495 N_("sort names to extract to match archive"), GRID+1 },
496 {"same-order", 0, 0, OPTION_ALIAS, NULL, GRID+1 },
497 {"preserve", PRESERVE_OPTION, 0, 0,
498 N_("same as both -p and -s"), GRID+1 },
499 {"delay-directory-restore", DELAY_DIRECTORY_RESTORE_OPTION, 0, 0,
500 N_("delay setting modification times and permissions of extracted"
501 " directories until the end of extraction"), GRID+1 },
502 {"no-delay-directory-restore", NO_DELAY_DIRECTORY_RESTORE_OPTION, 0, 0,
503 N_("cancel the effect of --delay-directory-restore option"), GRID+1 },
504 #undef GRID
505
506 #define GRID 60
507 {NULL, 0, NULL, 0,
508 N_("Device selection and switching:"), GRID },
509
510 {"file", 'f', N_("ARCHIVE"), 0,
511 N_("use archive file or device ARCHIVE"), GRID+1 },
512 {"force-local", FORCE_LOCAL_OPTION, 0, 0,
513 N_("archive file is local even if it has a colon"), GRID+1 },
514 {"rmt-command", RMT_COMMAND_OPTION, N_("COMMAND"), 0,
515 N_("use given rmt COMMAND instead of rmt"), GRID+1 },
516 {"rsh-command", RSH_COMMAND_OPTION, N_("COMMAND"), 0,
517 N_("use remote COMMAND instead of rsh"), GRID+1 },
518 #ifdef DEVICE_PREFIX
519 {"-[0-7][lmh]", 0, NULL, OPTION_DOC, /* It is OK, since `name' will never be
520 translated */
521 N_("specify drive and density"), GRID+1 },
522 #endif
523 {NULL, '0', NULL, OPTION_HIDDEN, NULL, GRID+1 },
524 {NULL, '1', NULL, OPTION_HIDDEN, NULL, GRID+1 },
525 {NULL, '2', NULL, OPTION_HIDDEN, NULL, GRID+1 },
526 {NULL, '3', NULL, OPTION_HIDDEN, NULL, GRID+1 },
527 {NULL, '4', NULL, OPTION_HIDDEN, NULL, GRID+1 },
528 {NULL, '5', NULL, OPTION_HIDDEN, NULL, GRID+1 },
529 {NULL, '6', NULL, OPTION_HIDDEN, NULL, GRID+1 },
530 {NULL, '7', NULL, OPTION_HIDDEN, NULL, GRID+1 },
531 {NULL, '8', NULL, OPTION_HIDDEN, NULL, GRID+1 },
532 {NULL, '9', NULL, OPTION_HIDDEN, NULL, GRID+1 },
533
534 {"multi-volume", 'M', 0, 0,
535 N_("create/list/extract multi-volume archive"), GRID+1 },
536 {"tape-length", 'L', N_("NUMBER"), 0,
537 N_("change tape after writing NUMBER x 1024 bytes"), GRID+1 },
538 {"info-script", 'F', N_("NAME"), 0,
539 N_("run script at end of each tape (implies -M)"), GRID+1 },
540 {"new-volume-script", 0, 0, OPTION_ALIAS, NULL, GRID+1 },
541 {"volno-file", VOLNO_FILE_OPTION, N_("FILE"), 0,
542 N_("use/update the volume number in FILE"), GRID+1 },
543 #undef GRID
544
545 #define GRID 70
546 {NULL, 0, NULL, 0,
547 N_("Device blocking:"), GRID },
548
549 {"blocking-factor", 'b', N_("BLOCKS"), 0,
550 N_("BLOCKS x 512 bytes per record"), GRID+1 },
551 {"record-size", RECORD_SIZE_OPTION, N_("NUMBER"), 0,
552 N_("NUMBER of bytes per record, multiple of 512"), GRID+1 },
553 {"ignore-zeros", 'i', 0, 0,
554 N_("ignore zeroed blocks in archive (means EOF)"), GRID+1 },
555 {"read-full-records", 'B', 0, 0,
556 N_("reblock as we read (for 4.2BSD pipes)"), GRID+1 },
557 #undef GRID
558
559 #define GRID 80
560 {NULL, 0, NULL, 0,
561 N_("Archive format selection:"), GRID },
562
563 {"format", 'H', N_("FORMAT"), 0,
564 N_("create archive of the given format"), GRID+1 },
565
566 {NULL, 0, NULL, 0, N_("FORMAT is one of the following:"), GRID+2 },
567 {" v7", 0, NULL, OPTION_DOC|OPTION_NO_TRANS, N_("old V7 tar format"),
568 GRID+3 },
569 {" oldgnu", 0, NULL, OPTION_DOC|OPTION_NO_TRANS,
570 N_("GNU format as per tar <= 1.12"), GRID+3 },
571 {" gnu", 0, NULL, OPTION_DOC|OPTION_NO_TRANS,
572 N_("GNU tar 1.13.x format"), GRID+3 },
573 {" ustar", 0, NULL, OPTION_DOC|OPTION_NO_TRANS,
574 N_("POSIX 1003.1-1988 (ustar) format"), GRID+3 },
575 {" pax", 0, NULL, OPTION_DOC|OPTION_NO_TRANS,
576 N_("POSIX 1003.1-2001 (pax) format"), GRID+3 },
577 {" posix", 0, NULL, OPTION_DOC|OPTION_NO_TRANS, N_("same as pax"), GRID+3 },
578
579 {"old-archive", OLD_ARCHIVE_OPTION, 0, 0, /* FIXME */
580 N_("same as --format=v7"), GRID+8 },
581 {"portability", 0, 0, OPTION_ALIAS, NULL, GRID+8 },
582 {"posix", POSIX_OPTION, 0, 0,
583 N_("same as --format=posix"), GRID+8 },
584 {"pax-option", PAX_OPTION, N_("keyword[[:]=value][,keyword[[:]=value]]..."), 0,
585 N_("control pax keywords"), GRID+8 },
586 {"label", 'V', N_("TEXT"), 0,
587 N_("create archive with volume name TEXT; at list/extract time, use TEXT as a globbing pattern for volume name"), GRID+8 },
588 #undef GRID
589
590 #define GRID 90
591 {NULL, 0, NULL, 0,
592 N_("Compression options:"), GRID },
593 {"auto-compress", 'a', 0, 0,
594 N_("use archive suffix to determine the compression program"), GRID+1 },
595 {"bzip2", 'j', 0, 0,
596 N_("filter the archive through bzip2"), GRID+1 },
597 {"gzip", 'z', 0, 0,
598 N_("filter the archive through gzip"), GRID+1 },
599 {"gunzip", 0, 0, OPTION_ALIAS, NULL, GRID+1 },
600 {"ungzip", 0, 0, OPTION_ALIAS, NULL, GRID+1 },
601 {"compress", 'Z', 0, 0,
602 N_("filter the archive through compress"), GRID+1 },
603 {"uncompress", 0, 0, OPTION_ALIAS, NULL, GRID+1 },
604 {"lzma", LZMA_OPTION, 0, 0,
605 N_("filter the archive through lzma"), GRID+1 },
606 {"use-compress-program", USE_COMPRESS_PROGRAM_OPTION, N_("PROG"), 0,
607 N_("filter through PROG (must accept -d)"), GRID+1 },
608 #undef GRID
609
610 #define GRID 100
611 {NULL, 0, NULL, 0,
612 N_("Local file selection:"), GRID },
613
614 {"add-file", ARGP_KEY_ARG, N_("FILE"), 0,
615 N_("add given FILE to the archive (useful if its name starts with a dash)"), GRID+1 },
616 {"directory", 'C', N_("DIR"), 0,
617 N_("change to directory DIR"), GRID+1 },
618 {"files-from", 'T', N_("FILE"), 0,
619 N_("get names to extract or create from FILE"), GRID+1 },
620 {"null", NULL_OPTION, 0, 0,
621 N_("-T reads null-terminated names, disable -C"), GRID+1 },
622 {"unquote", UNQUOTE_OPTION, 0, 0,
623 N_("unquote filenames read with -T (default)"), GRID+1 },
624 {"no-unquote", NO_UNQUOTE_OPTION, 0, 0,
625 N_("do not unquote filenames read with -T"), GRID+1 },
626 {"exclude", EXCLUDE_OPTION, N_("PATTERN"), 0,
627 N_("exclude files, given as a PATTERN"), GRID+1 },
628 {"exclude-from", 'X', N_("FILE"), 0,
629 N_("exclude patterns listed in FILE"), GRID+1 },
630 {"exclude-caches", EXCLUDE_CACHES_OPTION, 0, 0,
631 N_("exclude contents of directories containing CACHEDIR.TAG, "
632 "except for the tag file itself"), GRID+1 },
633 {"exclude-caches-under", EXCLUDE_CACHES_UNDER_OPTION, 0, 0,
634 N_("exclude everything under directories containing CACHEDIR.TAG"),
635 GRID+1 },
636 {"exclude-caches-all", EXCLUDE_CACHES_ALL_OPTION, 0, 0,
637 N_("exclude directories containing CACHEDIR.TAG"), GRID+1 },
638 {"exclude-tag", EXCLUDE_TAG_OPTION, N_("FILE"), 0,
639 N_("exclude contents of directories containing FILE, except"
640 " for FILE itself"), GRID+1 },
641 {"exclude-tag-under", EXCLUDE_TAG_UNDER_OPTION, N_("FILE"), 0,
642 N_("exclude everything under directories containing FILE"), GRID+1 },
643 {"exclude-tag-all", EXCLUDE_TAG_ALL_OPTION, N_("FILE"), 0,
644 N_("exclude directories containing FILE"), GRID+1 },
645 {"exclude-vcs", EXCLUDE_VCS_OPTION, NULL, 0,
646 N_("exclude version control system directories"), GRID+1 },
647 {"no-recursion", NO_RECURSION_OPTION, 0, 0,
648 N_("avoid descending automatically in directories"), GRID+1 },
649 {"one-file-system", ONE_FILE_SYSTEM_OPTION, 0, 0,
650 N_("stay in local file system when creating archive"), GRID+1 },
651 {"recursion", RECURSION_OPTION, 0, 0,
652 N_("recurse into directories (default)"), GRID+1 },
653 {"absolute-names", 'P', 0, 0,
654 N_("don't strip leading `/'s from file names"), GRID+1 },
655 {"dereference", 'h', 0, 0,
656 N_("follow symlinks; archive and dump the files they point to"), GRID+1 },
657 {"hard-dereference", HARD_DEREFERENCE_OPTION, 0, 0,
658 N_("follow hard links; archive and dump the files they refer to"), GRID+1 },
659 {"starting-file", 'K', N_("MEMBER-NAME"), 0,
660 N_("begin at member MEMBER-NAME in the archive"), GRID+1 },
661 {"newer", 'N', N_("DATE-OR-FILE"), 0,
662 N_("only store files newer than DATE-OR-FILE"), GRID+1 },
663 {"after-date", 0, 0, OPTION_ALIAS, NULL, GRID+1 },
664 {"newer-mtime", NEWER_MTIME_OPTION, N_("DATE"), 0,
665 N_("compare date and time when data changed only"), GRID+1 },
666 {"backup", BACKUP_OPTION, N_("CONTROL"), OPTION_ARG_OPTIONAL,
667 N_("backup before removal, choose version CONTROL"), GRID+1 },
668 {"suffix", SUFFIX_OPTION, N_("STRING"), 0,
669 N_("backup before removal, override usual suffix ('~' unless overridden by environment variable SIMPLE_BACKUP_SUFFIX)"), GRID+1 },
670 #undef GRID
671
672 #define GRID 110
673 {NULL, 0, NULL, 0,
674 N_("File name transformations:"), GRID },
675 {"strip-components", STRIP_COMPONENTS_OPTION, N_("NUMBER"), 0,
676 N_("strip NUMBER leading components from file names on extraction"),
677 GRID+1 },
678 {"transform", TRANSFORM_OPTION, N_("EXPRESSION"), 0,
679 N_("use sed replace EXPRESSION to transform file names"), GRID+1 },
680 #undef GRID
681
682 #define GRID 120
683 {NULL, 0, NULL, 0,
684 N_("File name matching options (affect both exclude and include patterns):"),
685 GRID },
686 {"ignore-case", IGNORE_CASE_OPTION, 0, 0,
687 N_("ignore case"), GRID+1 },
688 {"anchored", ANCHORED_OPTION, 0, 0,
689 N_("patterns match file name start"), GRID+1 },
690 {"no-anchored", NO_ANCHORED_OPTION, 0, 0,
691 N_("patterns match after any `/' (default for exclusion)"), GRID+1 },
692 {"no-ignore-case", NO_IGNORE_CASE_OPTION, 0, 0,
693 N_("case sensitive matching (default)"), GRID+1 },
694 {"wildcards", WILDCARDS_OPTION, 0, 0,
695 N_("use wildcards (default for exclusion)"), GRID+1 },
696 {"no-wildcards", NO_WILDCARDS_OPTION, 0, 0,
697 N_("verbatim string matching"), GRID+1 },
698 {"no-wildcards-match-slash", NO_WILDCARDS_MATCH_SLASH_OPTION, 0, 0,
699 N_("wildcards do not match `/'"), GRID+1 },
700 {"wildcards-match-slash", WILDCARDS_MATCH_SLASH_OPTION, 0, 0,
701 N_("wildcards match `/' (default for exclusion)"), GRID+1 },
702 #undef GRID
703
704 #define GRID 130
705 {NULL, 0, NULL, 0,
706 N_("Informative output:"), GRID },
707
708 {"verbose", 'v', 0, 0,
709 N_("verbosely list files processed"), GRID+1 },
710 {"checkpoint", CHECKPOINT_OPTION, N_("NUMBER"), OPTION_ARG_OPTIONAL,
711 N_("display progress messages every NUMBERth record (default 10)"),
712 GRID+1 },
713 {"checkpoint-action", CHECKPOINT_ACTION_OPTION, N_("ACTION"), 0,
714 N_("execute ACTION on each checkpoint"),
715 GRID+1 },
716 {"check-links", 'l', 0, 0,
717 N_("print a message if not all links are dumped"), GRID+1 },
718 {"totals", TOTALS_OPTION, N_("SIGNAL"), OPTION_ARG_OPTIONAL,
719 N_("print total bytes after processing the archive; "
720 "with an argument - print total bytes when this SIGNAL is delivered; "
721 "Allowed signals are: SIGHUP, SIGQUIT, SIGINT, SIGUSR1 and SIGUSR2; "
722 "the names without SIG prefix are also accepted"), GRID+1 },
723 {"utc", UTC_OPTION, 0, 0,
724 N_("print file modification dates in UTC"), GRID+1 },
725 {"index-file", INDEX_FILE_OPTION, N_("FILE"), 0,
726 N_("send verbose output to FILE"), GRID+1 },
727 {"block-number", 'R', 0, 0,
728 N_("show block number within archive with each message"), GRID+1 },
729 {"interactive", 'w', 0, 0,
730 N_("ask for confirmation for every action"), GRID+1 },
731 {"confirmation", 0, 0, OPTION_ALIAS, NULL, GRID+1 },
732 {"show-defaults", SHOW_DEFAULTS_OPTION, 0, 0,
733 N_("show tar defaults"), GRID+1 },
734 {"show-omitted-dirs", SHOW_OMITTED_DIRS_OPTION, 0, 0,
735 N_("when listing or extracting, list each directory that does not match search criteria"), GRID+1 },
736 {"show-transformed-names", SHOW_TRANSFORMED_NAMES_OPTION, 0, 0,
737 N_("show file or archive names after transformation"),
738 GRID+1 },
739 {"show-stored-names", 0, 0, OPTION_ALIAS, NULL, GRID+1 },
740 {"quoting-style", QUOTING_STYLE_OPTION, N_("STYLE"), 0,
741 N_("set name quoting style; see below for valid STYLE values"), GRID+1 },
742 {"quote-chars", QUOTE_CHARS_OPTION, N_("STRING"), 0,
743 N_("additionally quote characters from STRING"), GRID+1 },
744 {"no-quote-chars", NO_QUOTE_CHARS_OPTION, N_("STRING"), 0,
745 N_("disable quoting for characters from STRING"), GRID+1 },
746 #undef GRID
747
748 #define GRID 140
749 {NULL, 0, NULL, 0,
750 N_("Compatibility options:"), GRID },
751
752 {NULL, 'o', 0, 0,
753 N_("when creating, same as --old-archive; when extracting, same as --no-same-owner"), GRID+1 },
754 #undef GRID
755
756 #define GRID 150
757 {NULL, 0, NULL, 0,
758 N_("Other options:"), GRID },
759
760 {"restrict", RESTRICT_OPTION, 0, 0,
761 N_("disable use of some potentially harmful options"), -1 },
762
763 {"help", '?', 0, 0, N_("give this help list"), -1},
764 {"usage", USAGE_OPTION, 0, 0, N_("give a short usage message"), -1},
765 {"version", VERSION_OPTION, 0, 0, N_("print program version"), -1},
766 /* FIXME -V (--label) conflicts with the default short option for
767 --version */
768 {"HANG", HANG_OPTION, "SECS", OPTION_ARG_OPTIONAL | OPTION_HIDDEN,
769 N_("hang for SECS seconds (default 3600)"), 0},
770 #undef GRID
771
772 {0, 0, 0, 0, 0, 0}
773 };
774
775 static char const *const atime_preserve_args[] =
776 {
777 "replace", "system", NULL
778 };
779
780 static enum atime_preserve const atime_preserve_types[] =
781 {
782 replace_atime_preserve, system_atime_preserve
783 };
784
785 /* Make sure atime_preserve_types has as much entries as atime_preserve_args
786 (minus 1 for NULL guard) */
787 ARGMATCH_VERIFY (atime_preserve_args, atime_preserve_types);
788
789 /* Wildcard matching settings */
790 enum wildcards
791 {
792 default_wildcards, /* For exclusion == enable_wildcards,
793 for inclusion == disable_wildcards */
794 disable_wildcards,
795 enable_wildcards
796 };
797
798 struct tar_args /* Variables used during option parsing */
799 {
800 struct textual_date *textual_date; /* Keeps the arguments to --newer-mtime
801 and/or --date option if they are
802 textual dates */
803 enum wildcards wildcards; /* Wildcard settings (--wildcards/
804 --no-wildcards) */
805 int matching_flags; /* exclude_fnmatch options */
806 int include_anchored; /* Pattern anchoring options used for
807 file inclusion */
808 bool o_option; /* True if -o option was given */
809 bool pax_option; /* True if --pax-option was given */
810 char const *backup_suffix_string; /* --suffix option argument */
811 char const *version_control_string; /* --backup option argument */
812 bool input_files; /* True if some input files where given */
813 int compress_autodetect; /* True if compression autodetection should
814 be attempted when creating archives */
815 };
816
817 \f
818 #define MAKE_EXCL_OPTIONS(args) \
819 ((((args)->wildcards != disable_wildcards) ? EXCLUDE_WILDCARDS : 0) \
820 | (args)->matching_flags \
821 | recursion_option)
822
823 #define MAKE_INCL_OPTIONS(args) \
824 ((((args)->wildcards == enable_wildcards) ? EXCLUDE_WILDCARDS : 0) \
825 | (args)->include_anchored \
826 | (args)->matching_flags \
827 | recursion_option)
828
829 void
830 exclude_vcs_files ()
831 {
832 int i;
833 static char *vcs_file[] = {
834 /* CVS: */
835 "CVS",
836 ".cvsignore",
837 /* RCS: */
838 "RCS",
839 /* SCCS: */
840 "SCCS",
841 /* SVN: */
842 ".svn",
843 /* git: */
844 ".git",
845 ".gitignore",
846 /* Arch: */
847 ".arch-ids",
848 "{arch}",
849 "=RELEASE-ID",
850 "=meta-update",
851 "=update",
852 NULL
853 };
854
855 for (i = 0; vcs_file[i]; i++)
856 add_exclude (excluded, vcs_file[i], 0);
857 }
858
859 \f
860 #ifdef REMOTE_SHELL
861 # define DECL_SHOW_DEFAULT_SETTINGS(stream, printer) \
862 { \
863 printer (stream, \
864 "--format=%s -f%s -b%d --quoting-style=%s --rmt-command=%s", \
865 archive_format_string (DEFAULT_ARCHIVE_FORMAT), \
866 DEFAULT_ARCHIVE, DEFAULT_BLOCKING, \
867 quoting_style_args[DEFAULT_QUOTING_STYLE], \
868 DEFAULT_RMT_COMMAND); \
869 printer (stream, " --rsh-command=%s", REMOTE_SHELL); \
870 printer (stream, "\n"); \
871 }
872 #else
873 # define DECL_SHOW_DEFAULT_SETTINGS(stream, printer) \
874 { \
875 printer (stream, \
876 "--format=%s -f%s -b%d --quoting-style=%s --rmt-command=%s", \
877 archive_format_string (DEFAULT_ARCHIVE_FORMAT), \
878 DEFAULT_ARCHIVE, DEFAULT_BLOCKING, \
879 quoting_style_args[DEFAULT_QUOTING_STYLE], \
880 DEFAULT_RMT_COMMAND); \
881 printer (stream, "\n"); \
882 }
883 #endif
884
885 static void
886 show_default_settings (FILE *fp)
887 DECL_SHOW_DEFAULT_SETTINGS(fp, fprintf)
888
889 static void
890 show_default_settings_fs (argp_fmtstream_t fs)
891 DECL_SHOW_DEFAULT_SETTINGS(fs, argp_fmtstream_printf)
892
893 static void
894 set_subcommand_option (enum subcommand subcommand)
895 {
896 if (subcommand_option != UNKNOWN_SUBCOMMAND
897 && subcommand_option != subcommand)
898 USAGE_ERROR ((0, 0,
899 _("You may not specify more than one `-Acdtrux' option")));
900
901 subcommand_option = subcommand;
902 }
903
904 static void
905 set_use_compress_program_option (const char *string)
906 {
907 if (use_compress_program_option
908 && strcmp (use_compress_program_option, string) != 0)
909 USAGE_ERROR ((0, 0, _("Conflicting compression options")));
910
911 use_compress_program_option = string;
912 }
913 \f
914 static RETSIGTYPE
915 sigstat (int signo)
916 {
917 compute_duration ();
918 print_total_stats ();
919 #ifndef HAVE_SIGACTION
920 signal (signo, sigstat);
921 #endif
922 }
923
924 static void
925 stat_on_signal (int signo)
926 {
927 #ifdef HAVE_SIGACTION
928 struct sigaction act;
929 act.sa_handler = sigstat;
930 sigemptyset (&act.sa_mask);
931 act.sa_flags = 0;
932 sigaction (signo, &act, NULL);
933 #else
934 signal (signo, sigstat);
935 #endif
936 }
937
938 void
939 set_stat_signal (const char *name)
940 {
941 static struct sigtab
942 {
943 char *name;
944 int signo;
945 } sigtab[] = {
946 { "SIGUSR1", SIGUSR1 },
947 { "USR1", SIGUSR1 },
948 { "SIGUSR2", SIGUSR2 },
949 { "USR2", SIGUSR2 },
950 { "SIGHUP", SIGHUP },
951 { "HUP", SIGHUP },
952 { "SIGINT", SIGINT },
953 { "INT", SIGINT },
954 { "SIGQUIT", SIGQUIT },
955 { "QUIT", SIGQUIT }
956 };
957 struct sigtab *p;
958
959 for (p = sigtab; p < sigtab + sizeof (sigtab) / sizeof (sigtab[0]); p++)
960 if (strcmp (p->name, name) == 0)
961 {
962 stat_on_signal (p->signo);
963 return;
964 }
965 FATAL_ERROR ((0, 0, _("Unknown signal name: %s"), name));
966 }
967
968 \f
969 struct textual_date
970 {
971 struct textual_date *next;
972 struct timespec *ts;
973 const char *option;
974 const char *date;
975 };
976
977 static void
978 get_date_or_file (struct tar_args *args, const char *option,
979 const char *str, struct timespec *ts)
980 {
981 if (FILE_SYSTEM_PREFIX_LEN (str) != 0
982 || ISSLASH (*str)
983 || *str == '.')
984 {
985 struct stat st;
986 if (deref_stat (dereference_option, str, &st) != 0)
987 {
988 stat_error (str);
989 USAGE_ERROR ((0, 0, _("Date sample file not found")));
990 }
991 *ts = get_stat_mtime (&st);
992 }
993 else
994 {
995 if (! get_date (ts, str, NULL))
996 {
997 WARN ((0, 0, _("Substituting %s for unknown date format %s"),
998 tartime (*ts, false), quote (str)));
999 ts->tv_nsec = 0;
1000 }
1001 else
1002 {
1003 struct textual_date *p = xmalloc (sizeof (*p));
1004 p->ts = ts;
1005 p->option = option;
1006 p->date = str;
1007 p->next = args->textual_date;
1008 args->textual_date = p;
1009 }
1010 }
1011 }
1012
1013 static void
1014 report_textual_dates (struct tar_args *args)
1015 {
1016 struct textual_date *p;
1017 for (p = args->textual_date; p; )
1018 {
1019 struct textual_date *next = p->next;
1020 char const *treated_as = tartime (*p->ts, true);
1021 if (strcmp (p->date, treated_as) != 0)
1022 WARN ((0, 0, _("Option %s: Treating date `%s' as %s"),
1023 p->option, p->date, treated_as));
1024 free (p);
1025 p = next;
1026 }
1027 }
1028
1029 \f
1030 static volatile int _argp_hang;
1031
1032 enum read_file_list_state /* Result of reading file name from the list file */
1033 {
1034 file_list_success, /* OK, name read successfully */
1035 file_list_end, /* End of list file */
1036 file_list_zero, /* Zero separator encountered where it should not */
1037 file_list_skip /* Empty (zero-length) entry encountered, skip it */
1038 };
1039
1040 /* Read from FP a sequence of characters up to FILENAME_TERMINATOR and put them
1041 into STK.
1042 */
1043 static enum read_file_list_state
1044 read_name_from_file (FILE *fp, struct obstack *stk)
1045 {
1046 int c;
1047 size_t counter = 0;
1048
1049 for (c = getc (fp); c != EOF && c != filename_terminator; c = getc (fp))
1050 {
1051 if (c == 0)
1052 {
1053 /* We have read a zero separator. The file possibly is
1054 zero-separated */
1055 return file_list_zero;
1056 }
1057 obstack_1grow (stk, c);
1058 counter++;
1059 }
1060
1061 if (counter == 0 && c != EOF)
1062 return file_list_skip;
1063
1064 obstack_1grow (stk, 0);
1065
1066 return (counter == 0 && c == EOF) ? file_list_end : file_list_success;
1067 }
1068
1069 \f
1070 static bool files_from_option; /* When set, tar will not refuse to create
1071 empty archives */
1072 static struct obstack argv_stk; /* Storage for additional command line options
1073 read using -T option */
1074
1075 /* Prevent recursive inclusion of the same file */
1076 struct file_id_list
1077 {
1078 struct file_id_list *next;
1079 ino_t ino;
1080 dev_t dev;
1081 };
1082
1083 static struct file_id_list *file_id_list;
1084
1085 static void
1086 add_file_id (const char *filename)
1087 {
1088 struct file_id_list *p;
1089 struct stat st;
1090
1091 if (stat (filename, &st))
1092 stat_fatal (filename);
1093 for (p = file_id_list; p; p = p->next)
1094 if (p->ino == st.st_ino && p->dev == st.st_dev)
1095 {
1096 FATAL_ERROR ((0, 0, _("%s: file list already read"),
1097 quotearg_colon (filename)));
1098 }
1099 p = xmalloc (sizeof *p);
1100 p->next = file_id_list;
1101 p->ino = st.st_ino;
1102 p->dev = st.st_dev;
1103 file_id_list = p;
1104 }
1105
1106 /* Default density numbers for [0-9][lmh] device specifications */
1107
1108 #ifndef LOW_DENSITY_NUM
1109 # define LOW_DENSITY_NUM 0
1110 #endif
1111
1112 #ifndef MID_DENSITY_NUM
1113 # define MID_DENSITY_NUM 8
1114 #endif
1115
1116 #ifndef HIGH_DENSITY_NUM
1117 # define HIGH_DENSITY_NUM 16
1118 #endif
1119
1120 static void
1121 update_argv (const char *filename, struct argp_state *state)
1122 {
1123 FILE *fp;
1124 size_t count = 0, i;
1125 char *start, *p;
1126 char **new_argv;
1127 size_t new_argc;
1128 bool is_stdin = false;
1129 enum read_file_list_state read_state;
1130
1131 if (!strcmp (filename, "-"))
1132 {
1133 is_stdin = true;
1134 request_stdin ("-T");
1135 fp = stdin;
1136 }
1137 else
1138 {
1139 add_file_id (filename);
1140 if ((fp = fopen (filename, "r")) == NULL)
1141 open_fatal (filename);
1142 }
1143
1144 while ((read_state = read_name_from_file (fp, &argv_stk)) != file_list_end)
1145 {
1146 switch (read_state)
1147 {
1148 case file_list_success:
1149 count++;
1150 break;
1151
1152 case file_list_end: /* won't happen, just to pacify gcc */
1153 break;
1154
1155 case file_list_zero:
1156 {
1157 size_t size;
1158
1159 WARN ((0, 0, N_("%s: file name read contains nul character"),
1160 quotearg_colon (filename)));
1161
1162 /* Prepare new stack contents */
1163 size = obstack_object_size (&argv_stk);
1164 p = obstack_finish (&argv_stk);
1165 for (; size > 0; size--, p++)
1166 if (*p)
1167 obstack_1grow (&argv_stk, *p);
1168 else
1169 obstack_1grow (&argv_stk, '\n');
1170 obstack_1grow (&argv_stk, 0);
1171 count = 1;
1172 /* Read rest of files using new filename terminator */
1173 filename_terminator = 0;
1174 break;
1175 }
1176
1177 case file_list_skip:
1178 break;
1179 }
1180 }
1181
1182 if (!is_stdin)
1183 fclose (fp);
1184
1185 if (count == 0)
1186 return;
1187
1188 start = obstack_finish (&argv_stk);
1189
1190 if (filename_terminator == 0)
1191 for (p = start; *p; p += strlen (p) + 1)
1192 if (p[0] == '-')
1193 count++;
1194
1195 new_argc = state->argc + count;
1196 new_argv = xmalloc (sizeof (state->argv[0]) * (new_argc + 1));
1197 memcpy (new_argv, state->argv, sizeof (state->argv[0]) * (state->argc + 1));
1198 state->argv = new_argv;
1199 memmove (&state->argv[state->next + count], &state->argv[state->next],
1200 (state->argc - state->next + 1) * sizeof (state->argv[0]));
1201
1202 state->argc = new_argc;
1203
1204 for (i = state->next, p = start; *p; p += strlen (p) + 1, i++)
1205 {
1206 if (filename_terminator == 0 && p[0] == '-')
1207 state->argv[i++] = "--add-file";
1208 state->argv[i] = p;
1209 }
1210 }
1211
1212 \f
1213 static void
1214 tar_help (struct argp_state *state)
1215 {
1216 argp_fmtstream_t fs;
1217 state->flags |= ARGP_NO_EXIT;
1218 argp_state_help (state, state->out_stream,
1219 ARGP_HELP_STD_HELP & ~ARGP_HELP_BUG_ADDR);
1220 /* FIXME: use struct uparams.rmargin (from argp-help.c) instead of 79 */
1221 fs = argp_make_fmtstream (state->out_stream, 0, 79, 0);
1222
1223 argp_fmtstream_printf (fs, "\n%s\n\n",
1224 _("Valid arguments for --quoting-style options are:"));
1225 tar_list_quoting_styles (fs, " ");
1226
1227 argp_fmtstream_puts (fs, _("\n*This* tar defaults to:\n"));
1228 show_default_settings_fs (fs);
1229 argp_fmtstream_putc (fs, '\n');
1230 argp_fmtstream_printf (fs, _("Report bugs to %s.\n"),
1231 argp_program_bug_address);
1232 argp_fmtstream_free (fs);
1233 }
1234 \f
1235 static error_t
1236 parse_opt (int key, char *arg, struct argp_state *state)
1237 {
1238 struct tar_args *args = state->input;
1239
1240 switch (key)
1241 {
1242 case ARGP_KEY_ARG:
1243 /* File name or non-parsed option, because of ARGP_IN_ORDER */
1244 name_add_name (arg, MAKE_INCL_OPTIONS (args));
1245 args->input_files = true;
1246 break;
1247
1248 case 'A':
1249 set_subcommand_option (CAT_SUBCOMMAND);
1250 break;
1251
1252 case 'a':
1253 args->compress_autodetect = true;
1254 break;
1255
1256 case 'b':
1257 {
1258 uintmax_t u;
1259 if (! (xstrtoumax (arg, 0, 10, &u, "") == LONGINT_OK
1260 && u == (blocking_factor = u)
1261 && 0 < blocking_factor
1262 && u == (record_size = u * BLOCKSIZE) / BLOCKSIZE))
1263 USAGE_ERROR ((0, 0, "%s: %s", quotearg_colon (arg),
1264 _("Invalid blocking factor")));
1265 }
1266 break;
1267
1268 case 'B':
1269 /* Try to reblock input records. For reading 4.2BSD pipes. */
1270
1271 /* It would surely make sense to exchange -B and -R, but it seems
1272 that -B has been used for a long while in Sun tar and most
1273 BSD-derived systems. This is a consequence of the block/record
1274 terminology confusion. */
1275
1276 read_full_records_option = true;
1277 break;
1278
1279 case 'c':
1280 set_subcommand_option (CREATE_SUBCOMMAND);
1281 break;
1282
1283 case 'C':
1284 name_add_dir (arg);
1285 break;
1286
1287 case 'd':
1288 set_subcommand_option (DIFF_SUBCOMMAND);
1289 break;
1290
1291 case 'f':
1292 if (archive_names == allocated_archive_names)
1293 archive_name_array = x2nrealloc (archive_name_array,
1294 &allocated_archive_names,
1295 sizeof (archive_name_array[0]));
1296
1297 archive_name_array[archive_names++] = arg;
1298 break;
1299
1300 case 'F':
1301 /* Since -F is only useful with -M, make it implied. Run this
1302 script at the end of each tape. */
1303
1304 info_script_option = arg;
1305 multi_volume_option = true;
1306 break;
1307
1308 case 'g':
1309 listed_incremental_option = arg;
1310 after_date_option = true;
1311 /* Fall through. */
1312
1313 case 'G':
1314 /* We are making an incremental dump (FIXME: are we?); save
1315 directories at the beginning of the archive, and include in each
1316 directory its contents. */
1317
1318 incremental_option = true;
1319 break;
1320
1321 case 'h':
1322 /* Follow symbolic links. */
1323 dereference_option = true;
1324 break;
1325
1326 case HARD_DEREFERENCE_OPTION:
1327 hard_dereference_option = true;
1328 break;
1329
1330 case 'i':
1331 /* Ignore zero blocks (eofs). This can't be the default,
1332 because Unix tar writes two blocks of zeros, then pads out
1333 the record with garbage. */
1334
1335 ignore_zeros_option = true;
1336 break;
1337
1338 case 'I':
1339 USAGE_ERROR ((0, 0,
1340 _("Warning: the -I option is not supported;"
1341 " perhaps you meant -j or -T?")));
1342 break;
1343
1344 case 'j':
1345 set_use_compress_program_option ("bzip2");
1346 break;
1347
1348 case 'k':
1349 /* Don't replace existing files. */
1350 old_files_option = KEEP_OLD_FILES;
1351 break;
1352
1353 case 'K':
1354 starting_file_option = true;
1355 addname (arg, 0);
1356 break;
1357
1358 case ONE_FILE_SYSTEM_OPTION:
1359 /* When dumping directories, don't dump files/subdirectories
1360 that are on other filesystems. */
1361 one_file_system_option = true;
1362 break;
1363
1364 case 'l':
1365 check_links_option = 1;
1366 break;
1367
1368 case 'L':
1369 {
1370 uintmax_t u;
1371 if (xstrtoumax (arg, 0, 10, &u, "") != LONGINT_OK)
1372 USAGE_ERROR ((0, 0, "%s: %s", quotearg_colon (arg),
1373 _("Invalid tape length")));
1374 tape_length_option = 1024 * (tarlong) u;
1375 multi_volume_option = true;
1376 }
1377 break;
1378
1379 case LZMA_OPTION:
1380 set_use_compress_program_option ("lzma");
1381 break;
1382
1383 case 'm':
1384 touch_option = true;
1385 break;
1386
1387 case 'M':
1388 /* Make multivolume archive: when we can't write any more into
1389 the archive, re-open it, and continue writing. */
1390
1391 multi_volume_option = true;
1392 break;
1393
1394 case MTIME_OPTION:
1395 get_date_or_file (args, "--mtime", arg, &mtime_option);
1396 set_mtime_option = true;
1397 break;
1398
1399 case 'n':
1400 seekable_archive = true;
1401 break;
1402
1403 case 'N':
1404 after_date_option = true;
1405 /* Fall through. */
1406
1407 case NEWER_MTIME_OPTION:
1408 if (NEWER_OPTION_INITIALIZED (newer_mtime_option))
1409 USAGE_ERROR ((0, 0, _("More than one threshold date")));
1410 get_date_or_file (args,
1411 key == NEWER_MTIME_OPTION ? "--newer-mtime"
1412 : "--after-date", arg, &newer_mtime_option);
1413 break;
1414
1415 case 'o':
1416 args->o_option = true;
1417 break;
1418
1419 case 'O':
1420 to_stdout_option = true;
1421 break;
1422
1423 case 'p':
1424 same_permissions_option = true;
1425 break;
1426
1427 case 'P':
1428 absolute_names_option = true;
1429 break;
1430
1431 case 'r':
1432 set_subcommand_option (APPEND_SUBCOMMAND);
1433 break;
1434
1435 case 'R':
1436 /* Print block numbers for debugging bad tar archives. */
1437
1438 /* It would surely make sense to exchange -B and -R, but it seems
1439 that -B has been used for a long while in Sun tar and most
1440 BSD-derived systems. This is a consequence of the block/record
1441 terminology confusion. */
1442
1443 block_number_option = true;
1444 break;
1445
1446 case 's':
1447 /* Names to extract are sorted. */
1448
1449 same_order_option = true;
1450 break;
1451
1452 case 'S':
1453 sparse_option = true;
1454 break;
1455
1456 case SPARSE_VERSION_OPTION:
1457 sparse_option = true;
1458 {
1459 char *p;
1460 tar_sparse_major = strtoul (arg, &p, 10);
1461 if (*p)
1462 {
1463 if (*p != '.')
1464 USAGE_ERROR ((0, 0, _("Invalid sparse version value")));
1465 tar_sparse_minor = strtoul (p + 1, &p, 10);
1466 if (*p)
1467 USAGE_ERROR ((0, 0, _("Invalid sparse version value")));
1468 }
1469 }
1470 break;
1471
1472 case 't':
1473 set_subcommand_option (LIST_SUBCOMMAND);
1474 verbose_option++;
1475 break;
1476
1477 case TEST_LABEL_OPTION:
1478 set_subcommand_option (LIST_SUBCOMMAND);
1479 test_label_option = true;
1480 break;
1481
1482 case 'T':
1483 update_argv (arg, state);
1484 /* Indicate we've been given -T option. This is for backward
1485 compatibility only, so that `tar cfT archive /dev/null will
1486 succeed */
1487 files_from_option = true;
1488 break;
1489
1490 case 'u':
1491 set_subcommand_option (UPDATE_SUBCOMMAND);
1492 break;
1493
1494 case 'U':
1495 old_files_option = UNLINK_FIRST_OLD_FILES;
1496 break;
1497
1498 case UTC_OPTION:
1499 utc_option = true;
1500 break;
1501
1502 case 'v':
1503 verbose_option++;
1504 break;
1505
1506 case 'V':
1507 volume_label_option = arg;
1508 break;
1509
1510 case 'w':
1511 interactive_option = true;
1512 break;
1513
1514 case 'W':
1515 verify_option = true;
1516 break;
1517
1518 case 'x':
1519 set_subcommand_option (EXTRACT_SUBCOMMAND);
1520 break;
1521
1522 case 'X':
1523 if (add_exclude_file (add_exclude, excluded, arg,
1524 MAKE_EXCL_OPTIONS (args), '\n')
1525 != 0)
1526 {
1527 int e = errno;
1528 FATAL_ERROR ((0, e, "%s", quotearg_colon (arg)));
1529 }
1530 break;
1531
1532 case 'z':
1533 set_use_compress_program_option ("gzip");
1534 break;
1535
1536 case 'Z':
1537 set_use_compress_program_option ("compress");
1538 break;
1539
1540 case ANCHORED_OPTION:
1541 args->matching_flags |= EXCLUDE_ANCHORED;
1542 break;
1543
1544 case ATIME_PRESERVE_OPTION:
1545 atime_preserve_option =
1546 (arg
1547 ? XARGMATCH ("--atime-preserve", arg,
1548 atime_preserve_args, atime_preserve_types)
1549 : replace_atime_preserve);
1550 if (! O_NOATIME && atime_preserve_option == system_atime_preserve)
1551 FATAL_ERROR ((0, 0,
1552 _("--atime-preserve='system' is not supported"
1553 " on this platform")));
1554 break;
1555
1556 case CHECK_DEVICE_OPTION:
1557 check_device_option = true;
1558 break;
1559
1560 case NO_CHECK_DEVICE_OPTION:
1561 check_device_option = false;
1562 break;
1563
1564 case CHECKPOINT_OPTION:
1565 if (arg)
1566 {
1567 char *p;
1568
1569 if (*arg == '.')
1570 {
1571 checkpoint_compile_action (".");
1572 arg++;
1573 }
1574 checkpoint_option = strtoul (arg, &p, 0);
1575 if (*p)
1576 FATAL_ERROR ((0, 0,
1577 _("--checkpoint value is not an integer")));
1578 }
1579 else
1580 checkpoint_option = DEFAULT_CHECKPOINT;
1581 break;
1582
1583 case CHECKPOINT_ACTION_OPTION:
1584 checkpoint_compile_action (arg);
1585 break;
1586
1587 case BACKUP_OPTION:
1588 backup_option = true;
1589 if (arg)
1590 args->version_control_string = arg;
1591 break;
1592
1593 case DELAY_DIRECTORY_RESTORE_OPTION:
1594 delay_directory_restore_option = true;
1595 break;
1596
1597 case NO_DELAY_DIRECTORY_RESTORE_OPTION:
1598 delay_directory_restore_option = false;
1599 break;
1600
1601 case DELETE_OPTION:
1602 set_subcommand_option (DELETE_SUBCOMMAND);
1603 break;
1604
1605 case EXCLUDE_OPTION:
1606 add_exclude (excluded, arg, MAKE_EXCL_OPTIONS (args));
1607 break;
1608
1609 case EXCLUDE_CACHES_OPTION:
1610 add_exclusion_tag ("CACHEDIR.TAG", exclusion_tag_contents,
1611 cachedir_file_p);
1612 break;
1613
1614 case EXCLUDE_CACHES_UNDER_OPTION:
1615 add_exclusion_tag ("CACHEDIR.TAG", exclusion_tag_under,
1616 cachedir_file_p);
1617 break;
1618
1619 case EXCLUDE_CACHES_ALL_OPTION:
1620 add_exclusion_tag ("CACHEDIR.TAG", exclusion_tag_all,
1621 cachedir_file_p);
1622 break;
1623
1624 case EXCLUDE_TAG_OPTION:
1625 add_exclusion_tag (arg, exclusion_tag_contents, NULL);
1626 break;
1627
1628 case EXCLUDE_TAG_UNDER_OPTION:
1629 add_exclusion_tag (arg, exclusion_tag_under, NULL);
1630 break;
1631
1632 case EXCLUDE_TAG_ALL_OPTION:
1633 add_exclusion_tag (arg, exclusion_tag_all, NULL);
1634 break;
1635
1636 case EXCLUDE_VCS_OPTION:
1637 exclude_vcs_files ();
1638 break;
1639
1640 case FORCE_LOCAL_OPTION:
1641 force_local_option = true;
1642 break;
1643
1644 case 'H':
1645 set_archive_format (arg);
1646 break;
1647
1648 case INDEX_FILE_OPTION:
1649 index_file_name = arg;
1650 break;
1651
1652 case IGNORE_CASE_OPTION:
1653 args->matching_flags |= FNM_CASEFOLD;
1654 break;
1655
1656 case IGNORE_COMMAND_ERROR_OPTION:
1657 ignore_command_error_option = true;
1658 break;
1659
1660 case IGNORE_FAILED_READ_OPTION:
1661 ignore_failed_read_option = true;
1662 break;
1663
1664 case KEEP_NEWER_FILES_OPTION:
1665 old_files_option = KEEP_NEWER_FILES;
1666 break;
1667
1668 case GROUP_OPTION:
1669 if (! (strlen (arg) < GNAME_FIELD_SIZE
1670 && gname_to_gid (arg, &group_option)))
1671 {
1672 uintmax_t g;
1673 if (xstrtoumax (arg, 0, 10, &g, "") == LONGINT_OK
1674 && g == (gid_t) g)
1675 group_option = g;
1676 else
1677 FATAL_ERROR ((0, 0, "%s: %s", quotearg_colon (arg),
1678 _("%s: Invalid group")));
1679 }
1680 break;
1681
1682 case MODE_OPTION:
1683 mode_option = mode_compile (arg);
1684 if (!mode_option)
1685 FATAL_ERROR ((0, 0, _("Invalid mode given on option")));
1686 initial_umask = umask (0);
1687 umask (initial_umask);
1688 break;
1689
1690 case NO_ANCHORED_OPTION:
1691 args->include_anchored = 0; /* Clear the default for comman line args */
1692 args->matching_flags &= ~ EXCLUDE_ANCHORED;
1693 break;
1694
1695 case NO_IGNORE_CASE_OPTION:
1696 args->matching_flags &= ~ FNM_CASEFOLD;
1697 break;
1698
1699 case NO_IGNORE_COMMAND_ERROR_OPTION:
1700 ignore_command_error_option = false;
1701 break;
1702
1703 case NO_OVERWRITE_DIR_OPTION:
1704 old_files_option = NO_OVERWRITE_DIR_OLD_FILES;
1705 break;
1706
1707 case NO_QUOTE_CHARS_OPTION:
1708 for (;*arg; arg++)
1709 set_char_quoting (NULL, *arg, 0);
1710 break;
1711
1712 case NO_WILDCARDS_OPTION:
1713 args->wildcards = disable_wildcards;
1714 break;
1715
1716 case NO_WILDCARDS_MATCH_SLASH_OPTION:
1717 args->matching_flags |= FNM_FILE_NAME;
1718 break;
1719
1720 case NULL_OPTION:
1721 filename_terminator = '\0';
1722 break;
1723
1724 case NUMERIC_OWNER_OPTION:
1725 numeric_owner_option = true;
1726 break;
1727
1728 case OCCURRENCE_OPTION:
1729 if (!arg)
1730 occurrence_option = 1;
1731 else
1732 {
1733 uintmax_t u;
1734 if (xstrtoumax (arg, 0, 10, &u, "") == LONGINT_OK)
1735 occurrence_option = u;
1736 else
1737 FATAL_ERROR ((0, 0, "%s: %s", quotearg_colon (arg),
1738 _("Invalid number")));
1739 }
1740 break;
1741
1742 case OVERWRITE_DIR_OPTION:
1743 old_files_option = DEFAULT_OLD_FILES;
1744 break;
1745
1746 case OVERWRITE_OPTION:
1747 old_files_option = OVERWRITE_OLD_FILES;
1748 break;
1749
1750 case OWNER_OPTION:
1751 if (! (strlen (arg) < UNAME_FIELD_SIZE
1752 && uname_to_uid (arg, &owner_option)))
1753 {
1754 uintmax_t u;
1755 if (xstrtoumax (arg, 0, 10, &u, "") == LONGINT_OK
1756 && u == (uid_t) u)
1757 owner_option = u;
1758 else
1759 FATAL_ERROR ((0, 0, "%s: %s", quotearg_colon (arg),
1760 _("Invalid owner")));
1761 }
1762 break;
1763
1764 case QUOTE_CHARS_OPTION:
1765 for (;*arg; arg++)
1766 set_char_quoting (NULL, *arg, 1);
1767 break;
1768
1769 case QUOTING_STYLE_OPTION:
1770 tar_set_quoting_style (arg);
1771 break;
1772
1773 case PAX_OPTION:
1774 args->pax_option = true;
1775 xheader_set_option (arg);
1776 break;
1777
1778 case POSIX_OPTION:
1779 set_archive_format ("posix");
1780 break;
1781
1782 case PRESERVE_OPTION:
1783 /* FIXME: What it is good for? */
1784 same_permissions_option = true;
1785 same_order_option = true;
1786 break;
1787
1788 case RECORD_SIZE_OPTION:
1789 {
1790 uintmax_t u;
1791 if (! (xstrtoumax (arg, 0, 10, &u, "") == LONGINT_OK
1792 && u == (size_t) u))
1793 USAGE_ERROR ((0, 0, "%s: %s", quotearg_colon (arg),
1794 _("Invalid record size")));
1795 record_size = u;
1796 if (record_size % BLOCKSIZE != 0)
1797 USAGE_ERROR ((0, 0, _("Record size must be a multiple of %d."),
1798 BLOCKSIZE));
1799 blocking_factor = record_size / BLOCKSIZE;
1800 }
1801 break;
1802
1803 case RECURSIVE_UNLINK_OPTION:
1804 recursive_unlink_option = true;
1805 break;
1806
1807 case REMOVE_FILES_OPTION:
1808 remove_files_option = true;
1809 break;
1810
1811 case RESTRICT_OPTION:
1812 restrict_option = true;
1813 break;
1814
1815 case RMT_COMMAND_OPTION:
1816 rmt_command = arg;
1817 break;
1818
1819 case RSH_COMMAND_OPTION:
1820 rsh_command_option = arg;
1821 break;
1822
1823 case SHOW_DEFAULTS_OPTION:
1824 show_default_settings (stdout);
1825 close_stdout ();
1826 exit (0);
1827
1828 case STRIP_COMPONENTS_OPTION:
1829 {
1830 uintmax_t u;
1831 if (! (xstrtoumax (arg, 0, 10, &u, "") == LONGINT_OK
1832 && u == (size_t) u))
1833 USAGE_ERROR ((0, 0, "%s: %s", quotearg_colon (arg),
1834 _("Invalid number of elements")));
1835 strip_name_components = u;
1836 }
1837 break;
1838
1839 case SHOW_OMITTED_DIRS_OPTION:
1840 show_omitted_dirs_option = true;
1841 break;
1842
1843 case SHOW_TRANSFORMED_NAMES_OPTION:
1844 show_transformed_names_option = true;
1845 break;
1846
1847 case SUFFIX_OPTION:
1848 backup_option = true;
1849 args->backup_suffix_string = arg;
1850 break;
1851
1852 case TO_COMMAND_OPTION:
1853 if (to_command_option)
1854 USAGE_ERROR ((0, 0, _("Only one --to-command option allowed")));
1855 to_command_option = arg;
1856 break;
1857
1858 case TOTALS_OPTION:
1859 if (arg)
1860 set_stat_signal (arg);
1861 else
1862 totals_option = true;
1863 break;
1864
1865 case TRANSFORM_OPTION:
1866 set_transform_expr (arg);
1867 break;
1868
1869 case USE_COMPRESS_PROGRAM_OPTION:
1870 set_use_compress_program_option (arg);
1871 break;
1872
1873 case VOLNO_FILE_OPTION:
1874 volno_file_option = arg;
1875 break;
1876
1877 case WILDCARDS_OPTION:
1878 args->wildcards = enable_wildcards;
1879 break;
1880
1881 case WILDCARDS_MATCH_SLASH_OPTION:
1882 args->matching_flags &= ~ FNM_FILE_NAME;
1883 break;
1884
1885 case NO_RECURSION_OPTION:
1886 recursion_option = 0;
1887 break;
1888
1889 case NO_SAME_OWNER_OPTION:
1890 same_owner_option = -1;
1891 break;
1892
1893 case NO_SAME_PERMISSIONS_OPTION:
1894 same_permissions_option = -1;
1895 break;
1896
1897 case RECURSION_OPTION:
1898 recursion_option = FNM_LEADING_DIR;
1899 break;
1900
1901 case SAME_OWNER_OPTION:
1902 same_owner_option = 1;
1903 break;
1904
1905 case UNQUOTE_OPTION:
1906 unquote_option = true;
1907 break;
1908
1909 case NO_UNQUOTE_OPTION:
1910 unquote_option = false;
1911 break;
1912
1913 case '0':
1914 case '1':
1915 case '2':
1916 case '3':
1917 case '4':
1918 case '5':
1919 case '6':
1920 case '7':
1921
1922 #ifdef DEVICE_PREFIX
1923 {
1924 int device = key - '0';
1925 int density;
1926 static char buf[sizeof DEVICE_PREFIX + 10];
1927 char *cursor;
1928
1929 if (arg[1])
1930 argp_error (state, _("Malformed density argument: %s"), quote (arg));
1931
1932 strcpy (buf, DEVICE_PREFIX);
1933 cursor = buf + strlen (buf);
1934
1935 #ifdef DENSITY_LETTER
1936
1937 sprintf (cursor, "%d%c", device, arg[0]);
1938
1939 #else /* not DENSITY_LETTER */
1940
1941 switch (arg[0])
1942 {
1943 case 'l':
1944 device += LOW_DENSITY_NUM;
1945 break;
1946
1947 case 'm':
1948 device += MID_DENSITY_NUM;
1949 break;
1950
1951 case 'h':
1952 device += HIGH_DENSITY_NUM;
1953 break;
1954
1955 default:
1956 argp_error (state, _("Unknown density: `%c'"), arg[0]);
1957 }
1958 sprintf (cursor, "%d", device);
1959
1960 #endif /* not DENSITY_LETTER */
1961
1962 if (archive_names == allocated_archive_names)
1963 archive_name_array = x2nrealloc (archive_name_array,
1964 &allocated_archive_names,
1965 sizeof (archive_name_array[0]));
1966 archive_name_array[archive_names++] = xstrdup (buf);
1967 }
1968 break;
1969
1970 #else /* not DEVICE_PREFIX */
1971
1972 argp_error (state,
1973 _("Options `-[0-7][lmh]' not supported by *this* tar"));
1974
1975 #endif /* not DEVICE_PREFIX */
1976
1977 case '?':
1978 tar_help (state);
1979 close_stdout ();
1980 exit (0);
1981
1982 case USAGE_OPTION:
1983 argp_state_help (state, state->out_stream, ARGP_HELP_USAGE);
1984 close_stdout ();
1985 exit (0);
1986
1987 case VERSION_OPTION:
1988 version_etc (state->out_stream, "tar", PACKAGE_NAME, VERSION,
1989 "John Gilmore", "Jay Fenlason", (char *) NULL);
1990 close_stdout ();
1991 exit (0);
1992
1993 case HANG_OPTION:
1994 _argp_hang = atoi (arg ? arg : "3600");
1995 while (_argp_hang-- > 0)
1996 sleep (1);
1997 break;
1998
1999 default:
2000 return ARGP_ERR_UNKNOWN;
2001 }
2002 return 0;
2003 }
2004
2005 static struct argp argp = {
2006 options,
2007 parse_opt,
2008 N_("[FILE]..."),
2009 doc,
2010 NULL,
2011 NULL,
2012 NULL
2013 };
2014
2015 void
2016 usage (int status)
2017 {
2018 argp_help (&argp, stderr, ARGP_HELP_SEE, (char*) program_name);
2019 close_stdout ();
2020 exit (status);
2021 }
2022
2023 /* Parse the options for tar. */
2024
2025 static struct argp_option *
2026 find_argp_option (struct argp_option *o, int letter)
2027 {
2028 for (;
2029 !(o->name == NULL
2030 && o->key == 0
2031 && o->arg == 0
2032 && o->flags == 0
2033 && o->doc == NULL); o++)
2034 if (o->key == letter)
2035 return o;
2036 return NULL;
2037 }
2038
2039 static void
2040 decode_options (int argc, char **argv)
2041 {
2042 int idx;
2043 struct tar_args args;
2044
2045 /* Set some default option values. */
2046 args.textual_date = NULL;
2047 args.wildcards = default_wildcards;
2048 args.matching_flags = 0;
2049 args.include_anchored = EXCLUDE_ANCHORED;
2050 args.o_option = false;
2051 args.pax_option = false;
2052 args.backup_suffix_string = getenv ("SIMPLE_BACKUP_SUFFIX");
2053 args.version_control_string = 0;
2054 args.input_files = false;
2055 args.compress_autodetect = false;
2056
2057 subcommand_option = UNKNOWN_SUBCOMMAND;
2058 archive_format = DEFAULT_FORMAT;
2059 blocking_factor = DEFAULT_BLOCKING;
2060 record_size = DEFAULT_BLOCKING * BLOCKSIZE;
2061 excluded = new_exclude ();
2062 newer_mtime_option.tv_sec = TYPE_MINIMUM (time_t);
2063 newer_mtime_option.tv_nsec = -1;
2064 recursion_option = FNM_LEADING_DIR;
2065 unquote_option = true;
2066 tar_sparse_major = 1;
2067 tar_sparse_minor = 0;
2068
2069 owner_option = -1;
2070 group_option = -1;
2071
2072 check_device_option = true;
2073
2074 /* Convert old-style tar call by exploding option element and rearranging
2075 options accordingly. */
2076
2077 if (argc > 1 && argv[1][0] != '-')
2078 {
2079 int new_argc; /* argc value for rearranged arguments */
2080 char **new_argv; /* argv value for rearranged arguments */
2081 char *const *in; /* cursor into original argv */
2082 char **out; /* cursor into rearranged argv */
2083 const char *letter; /* cursor into old option letters */
2084 char buffer[3]; /* constructed option buffer */
2085
2086 /* Initialize a constructed option. */
2087
2088 buffer[0] = '-';
2089 buffer[2] = '\0';
2090
2091 /* Allocate a new argument array, and copy program name in it. */
2092
2093 new_argc = argc - 1 + strlen (argv[1]);
2094 new_argv = xmalloc ((new_argc + 1) * sizeof (char *));
2095 in = argv;
2096 out = new_argv;
2097 *out++ = *in++;
2098
2099 /* Copy each old letter option as a separate option, and have the
2100 corresponding argument moved next to it. */
2101
2102 for (letter = *in++; *letter; letter++)
2103 {
2104 struct argp_option *opt;
2105
2106 buffer[1] = *letter;
2107 *out++ = xstrdup (buffer);
2108 opt = find_argp_option (options, *letter);
2109 if (opt && opt->arg)
2110 {
2111 if (in < argv + argc)
2112 *out++ = *in++;
2113 else
2114 USAGE_ERROR ((0, 0, _("Old option `%c' requires an argument."),
2115 *letter));
2116 }
2117 }
2118
2119 /* Copy all remaining options. */
2120
2121 while (in < argv + argc)
2122 *out++ = *in++;
2123 *out = 0;
2124
2125 /* Replace the old option list by the new one. */
2126
2127 argc = new_argc;
2128 argv = new_argv;
2129 }
2130
2131 /* Parse all options and non-options as they appear. */
2132
2133 prepend_default_options (getenv ("TAR_OPTIONS"), &argc, &argv);
2134
2135 if (argp_parse (&argp, argc, argv, ARGP_IN_ORDER|ARGP_NO_HELP,
2136 &idx, &args))
2137 exit (TAREXIT_FAILURE);
2138
2139
2140 /* Special handling for 'o' option:
2141
2142 GNU tar used to say "output old format".
2143 UNIX98 tar says don't chown files after extracting (we use
2144 "--no-same-owner" for this).
2145
2146 The old GNU tar semantics is retained when used with --create
2147 option, otherwise UNIX98 semantics is assumed */
2148
2149 if (args.o_option)
2150 {
2151 if (subcommand_option == CREATE_SUBCOMMAND)
2152 {
2153 /* GNU Tar <= 1.13 compatibility */
2154 set_archive_format ("v7");
2155 }
2156 else
2157 {
2158 /* UNIX98 compatibility */
2159 same_owner_option = -1;
2160 }
2161 }
2162
2163 /* Handle operands after any "--" argument. */
2164 for (; idx < argc; idx++)
2165 {
2166 name_add_name (argv[idx], MAKE_INCL_OPTIONS (&args));
2167 args.input_files = true;
2168 }
2169
2170 /* Warn about implicit use of the wildcards in command line arguments.
2171 See TODO */
2172 warn_regex_usage = args.wildcards == default_wildcards;
2173
2174 /* Derive option values and check option consistency. */
2175
2176 if (archive_format == DEFAULT_FORMAT)
2177 {
2178 if (args.pax_option)
2179 archive_format = POSIX_FORMAT;
2180 else
2181 archive_format = DEFAULT_ARCHIVE_FORMAT;
2182 }
2183
2184 if ((volume_label_option && subcommand_option == CREATE_SUBCOMMAND)
2185 || incremental_option
2186 || multi_volume_option
2187 || sparse_option)
2188 assert_format (FORMAT_MASK (OLDGNU_FORMAT)
2189 | FORMAT_MASK (GNU_FORMAT)
2190 | FORMAT_MASK (POSIX_FORMAT));
2191
2192 if (occurrence_option)
2193 {
2194 if (!args.input_files)
2195 USAGE_ERROR ((0, 0,
2196 _("--occurrence is meaningless without a file list")));
2197 if (subcommand_option != DELETE_SUBCOMMAND
2198 && subcommand_option != DIFF_SUBCOMMAND
2199 && subcommand_option != EXTRACT_SUBCOMMAND
2200 && subcommand_option != LIST_SUBCOMMAND)
2201 USAGE_ERROR ((0, 0,
2202 _("--occurrence cannot be used in the requested operation mode")));
2203 }
2204
2205 if (seekable_archive && subcommand_option == DELETE_SUBCOMMAND)
2206 {
2207 /* The current code in delete.c is based on the assumption that
2208 skip_member() reads all data from the archive. So, we should
2209 make sure it won't use seeks. On the other hand, the same code
2210 depends on the ability to backspace a record in the archive,
2211 so setting seekable_archive to false is technically incorrect.
2212 However, it is tested only in skip_member(), so it's not a
2213 problem. */
2214 seekable_archive = false;
2215 }
2216
2217 if (archive_names == 0)
2218 {
2219 /* If no archive file name given, try TAPE from the environment, or
2220 else, DEFAULT_ARCHIVE from the configuration process. */
2221
2222 archive_names = 1;
2223 archive_name_array[0] = getenv ("TAPE");
2224 if (! archive_name_array[0])
2225 archive_name_array[0] = DEFAULT_ARCHIVE;
2226 }
2227
2228 /* Allow multiple archives only with `-M'. */
2229
2230 if (archive_names > 1 && !multi_volume_option)
2231 USAGE_ERROR ((0, 0,
2232 _("Multiple archive files require `-M' option")));
2233
2234 if (listed_incremental_option
2235 && NEWER_OPTION_INITIALIZED (newer_mtime_option))
2236 USAGE_ERROR ((0, 0,
2237 _("Cannot combine --listed-incremental with --newer")));
2238
2239 if (volume_label_option)
2240 {
2241 if (archive_format == GNU_FORMAT || archive_format == OLDGNU_FORMAT)
2242 {
2243 size_t volume_label_max_len =
2244 (sizeof current_header->header.name
2245 - 1 /* for trailing '\0' */
2246 - (multi_volume_option
2247 ? (sizeof " Volume "
2248 - 1 /* for null at end of " Volume " */
2249 + INT_STRLEN_BOUND (int) /* for volume number */
2250 - 1 /* for sign, as 0 <= volno */)
2251 : 0));
2252 if (volume_label_max_len < strlen (volume_label_option))
2253 USAGE_ERROR ((0, 0,
2254 ngettext ("%s: Volume label is too long (limit is %lu byte)",
2255 "%s: Volume label is too long (limit is %lu bytes)",
2256 volume_label_max_len),
2257 quotearg_colon (volume_label_option),
2258 (unsigned long) volume_label_max_len));
2259 }
2260 /* else FIXME
2261 Label length in PAX format is limited by the volume size. */
2262 }
2263
2264 if (verify_option)
2265 {
2266 if (multi_volume_option)
2267 USAGE_ERROR ((0, 0, _("Cannot verify multi-volume archives")));
2268 if (use_compress_program_option)
2269 USAGE_ERROR ((0, 0, _("Cannot verify compressed archives")));
2270 }
2271
2272 if (use_compress_program_option)
2273 {
2274 if (multi_volume_option)
2275 USAGE_ERROR ((0, 0, _("Cannot use multi-volume compressed archives")));
2276 if (subcommand_option == UPDATE_SUBCOMMAND
2277 || subcommand_option == APPEND_SUBCOMMAND
2278 || subcommand_option == DELETE_SUBCOMMAND)
2279 USAGE_ERROR ((0, 0, _("Cannot update compressed archives")));
2280 if (subcommand_option == CAT_SUBCOMMAND)
2281 USAGE_ERROR ((0, 0, _("Cannot concatenate compressed archives")));
2282 }
2283
2284 /* It is no harm to use --pax-option on non-pax archives in archive
2285 reading mode. It may even be useful, since it allows to override
2286 file attributes from tar headers. Therefore I allow such usage.
2287 --gray */
2288 if (args.pax_option
2289 && archive_format != POSIX_FORMAT
2290 && (subcommand_option != EXTRACT_SUBCOMMAND
2291 || subcommand_option != DIFF_SUBCOMMAND
2292 || subcommand_option != LIST_SUBCOMMAND))
2293 USAGE_ERROR ((0, 0, _("--pax-option can be used only on POSIX archives")));
2294
2295 /* If ready to unlink hierarchies, so we are for simpler files. */
2296 if (recursive_unlink_option)
2297 old_files_option = UNLINK_FIRST_OLD_FILES;
2298
2299
2300 if (test_label_option)
2301 {
2302 /* --test-label is silent if the user has specified the label name to
2303 compare against. */
2304 if (!args.input_files)
2305 verbose_option++;
2306 }
2307 else if (utc_option)
2308 verbose_option = 2;
2309
2310 /* Forbid using -c with no input files whatsoever. Check that `-f -',
2311 explicit or implied, is used correctly. */
2312
2313 switch (subcommand_option)
2314 {
2315 case CREATE_SUBCOMMAND:
2316 if (!args.input_files && !files_from_option)
2317 USAGE_ERROR ((0, 0,
2318 _("Cowardly refusing to create an empty archive")));
2319 if (args.compress_autodetect && archive_names
2320 && strcmp (archive_name_array[0], "-"))
2321 set_comression_program_by_suffix (archive_name_array[0],
2322 use_compress_program_option);
2323 break;
2324
2325 case EXTRACT_SUBCOMMAND:
2326 case LIST_SUBCOMMAND:
2327 case DIFF_SUBCOMMAND:
2328 for (archive_name_cursor = archive_name_array;
2329 archive_name_cursor < archive_name_array + archive_names;
2330 archive_name_cursor++)
2331 if (!strcmp (*archive_name_cursor, "-"))
2332 request_stdin ("-f");
2333 break;
2334
2335 case CAT_SUBCOMMAND:
2336 case UPDATE_SUBCOMMAND:
2337 case APPEND_SUBCOMMAND:
2338 for (archive_name_cursor = archive_name_array;
2339 archive_name_cursor < archive_name_array + archive_names;
2340 archive_name_cursor++)
2341 if (!strcmp (*archive_name_cursor, "-"))
2342 USAGE_ERROR ((0, 0,
2343 _("Options `-Aru' are incompatible with `-f -'")));
2344
2345 default:
2346 break;
2347 }
2348
2349 /* Initialize stdlis */
2350 if (index_file_name)
2351 {
2352 stdlis = fopen (index_file_name, "w");
2353 if (! stdlis)
2354 open_error (index_file_name);
2355 }
2356 else
2357 stdlis = to_stdout_option ? stderr : stdout;
2358
2359 archive_name_cursor = archive_name_array;
2360
2361 /* Prepare for generating backup names. */
2362
2363 if (args.backup_suffix_string)
2364 simple_backup_suffix = xstrdup (args.backup_suffix_string);
2365
2366 if (backup_option)
2367 {
2368 backup_type = xget_version ("--backup", args.version_control_string);
2369 /* No backup is needed either if explicitely disabled or if
2370 the extracted files are not being written to disk. */
2371 if (backup_type == no_backups || EXTRACT_OVER_PIPE)
2372 backup_option = false;
2373 }
2374
2375 checkpoint_finish_compile ();
2376
2377 if (verbose_option)
2378 report_textual_dates (&args);
2379 }
2380
2381 \f
2382 /* Tar proper. */
2383
2384 /* Main routine for tar. */
2385 int
2386 main (int argc, char **argv)
2387 {
2388 set_start_time ();
2389 program_name = argv[0];
2390
2391 setlocale (LC_ALL, "");
2392 bindtextdomain (PACKAGE, LOCALEDIR);
2393 textdomain (PACKAGE);
2394
2395 exit_failure = TAREXIT_FAILURE;
2396 exit_status = TAREXIT_SUCCESS;
2397 filename_terminator = '\n';
2398 set_quoting_style (0, DEFAULT_QUOTING_STYLE);
2399
2400 /* Make sure we have first three descriptors available */
2401 stdopen ();
2402
2403 /* Pre-allocate a few structures. */
2404
2405 allocated_archive_names = 10;
2406 archive_name_array =
2407 xmalloc (sizeof (const char *) * allocated_archive_names);
2408 archive_names = 0;
2409
2410 obstack_init (&argv_stk);
2411
2412 #ifdef SIGCHLD
2413 /* System V fork+wait does not work if SIGCHLD is ignored. */
2414 signal (SIGCHLD, SIG_DFL);
2415 #endif
2416
2417 /* Decode options. */
2418
2419 decode_options (argc, argv);
2420
2421 name_init ();
2422
2423 /* Main command execution. */
2424
2425 if (volno_file_option)
2426 init_volume_number ();
2427
2428 switch (subcommand_option)
2429 {
2430 case UNKNOWN_SUBCOMMAND:
2431 USAGE_ERROR ((0, 0,
2432 _("You must specify one of the `-Acdtrux' options")));
2433
2434 case CAT_SUBCOMMAND:
2435 case UPDATE_SUBCOMMAND:
2436 case APPEND_SUBCOMMAND:
2437 update_archive ();
2438 break;
2439
2440 case DELETE_SUBCOMMAND:
2441 delete_archive_members ();
2442 break;
2443
2444 case CREATE_SUBCOMMAND:
2445 create_archive ();
2446 break;
2447
2448 case EXTRACT_SUBCOMMAND:
2449 extr_init ();
2450 read_and (extract_archive);
2451
2452 /* FIXME: should extract_finish () even if an ordinary signal is
2453 received. */
2454 extract_finish ();
2455
2456 break;
2457
2458 case LIST_SUBCOMMAND:
2459 read_and (list_archive);
2460 break;
2461
2462 case DIFF_SUBCOMMAND:
2463 diff_init ();
2464 read_and (diff_archive);
2465 break;
2466 }
2467
2468 if (totals_option)
2469 print_total_stats ();
2470
2471 if (check_links_option)
2472 check_links ();
2473
2474 if (volno_file_option)
2475 closeout_volume_number ();
2476
2477 /* Dispose of allocated memory, and return. */
2478
2479 free (archive_name_array);
2480 name_term ();
2481
2482 if (exit_status == TAREXIT_FAILURE)
2483 error (0, 0, _("Error exit delayed from previous errors"));
2484
2485 if (stdlis == stdout)
2486 close_stdout ();
2487 else if (ferror (stderr) || fclose (stderr) != 0)
2488 exit_status = TAREXIT_FAILURE;
2489
2490 return exit_status;
2491 }
2492
2493 void
2494 tar_stat_init (struct tar_stat_info *st)
2495 {
2496 memset (st, 0, sizeof (*st));
2497 }
2498
2499 void
2500 tar_stat_destroy (struct tar_stat_info *st)
2501 {
2502 free (st->orig_file_name);
2503 free (st->file_name);
2504 free (st->link_name);
2505 free (st->uname);
2506 free (st->gname);
2507 free (st->sparse_map);
2508 free (st->dumpdir);
2509 xheader_destroy (&st->xhdr);
2510 memset (st, 0, sizeof (*st));
2511 }
2512
2513 /* Format mask for all available formats that support nanosecond
2514 timestamp resolution. */
2515 #define NS_PRECISION_FORMAT_MASK FORMAT_MASK (POSIX_FORMAT)
2516
2517 /* Same as timespec_cmp, but ignore nanoseconds if current archive
2518 format does not provide sufficient resolution. */
2519 int
2520 tar_timespec_cmp (struct timespec a, struct timespec b)
2521 {
2522 if (!(FORMAT_MASK (current_format) & NS_PRECISION_FORMAT_MASK))
2523 a.tv_nsec = b.tv_nsec = 0;
2524 return timespec_cmp (a, b);
2525 }
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