1 /* Extract files from a tar archive.
3 Copyright (C) 1988, 1992, 1993, 1994, 1996, 1997, 1998, 1999, 2000,
4 2001, 2003, 2004 Free Software Foundation, Inc.
6 Written by John Gilmore, on 1985-11-19.
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 2, or (at your option) any later
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.
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 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
38 bool we_are_root
; /* true if our effective uid == 0 */
39 static mode_t newdir_umask
; /* umask when creating new directories */
40 static mode_t current_umask
; /* current umask (which is set to 0 if -p) */
42 /* Status of the permissions of a file that we are extracting. */
45 /* This file may have existed already; its permissions are unknown. */
48 /* This file was created using the permissions from the archive. */
51 /* This is an intermediate directory; the archive did not specify
56 /* List of directories whose statuses we need to extract after we've
57 finished extracting their subsidiary files. If you consider each
58 contiguous subsequence of elements of the form [D]?[^D]*, where [D]
59 represents an element where AFTER_SYMLINKS is nonzero and [^D]
60 represents an element where AFTER_SYMLINKS is zero, then the head
61 of the subsequence has the longest name, and each non-head element
62 in the prefix is an ancestor (in the directory hierarchy) of the
65 struct delayed_set_stat
67 struct delayed_set_stat
*next
;
68 struct stat stat_info
;
70 mode_t invert_permissions
;
71 enum permstatus permstatus
;
76 static struct delayed_set_stat
*delayed_set_stat_head
;
78 /* List of symbolic links whose creation we have delayed. */
79 struct delayed_symlink
81 /* The next delayed symbolic link in the list. */
82 struct delayed_symlink
*next
;
84 /* The device, inode number and last-modified time of the placeholder. */
89 /* The desired owner and group of the symbolic link. */
93 /* A list of sources for this symlink. The sources are all to be
94 hard-linked together. */
95 struct string_list
*sources
;
97 /* The desired target of the desired link. */
101 static struct delayed_symlink
*delayed_symlink_head
;
105 struct string_list
*next
;
109 /* Set up to extract files. */
113 we_are_root
= geteuid () == 0;
114 same_permissions_option
+= we_are_root
;
115 same_owner_option
+= we_are_root
;
116 xalloc_fail_func
= extract_finish
;
118 /* Save 'root device' to avoid purging mount points.
119 FIXME: Should the same be done after handling -C option ? */
120 if (one_file_system_option
)
123 char *dir
= xgetcwd ();
125 if (deref_stat (true, dir
, &st
))
128 root_device
= st
.st_dev
;
131 /* Option -p clears the kernel umask, so it does not affect proper
132 restoration of file permissions. New intermediate directories will
133 comply with umask at start of program. */
135 newdir_umask
= umask (0);
136 if (0 < same_permissions_option
)
140 umask (newdir_umask
); /* restore the kernel umask */
141 current_umask
= newdir_umask
;
145 /* If restoring permissions, restore the mode for FILE_NAME from
146 information given in *STAT_INFO (where *CUR_INFO gives
147 the current status if CUR_INFO is nonzero); otherwise invert the
148 INVERT_PERMISSIONS bits from the file's current permissions.
149 PERMSTATUS specifies the status of the file's permissions.
150 TYPEFLAG specifies the type of the file. */
152 set_mode (char const *file_name
,
153 struct stat
const *stat_info
,
154 struct stat
const *cur_info
,
155 mode_t invert_permissions
, enum permstatus permstatus
,
160 if (0 < same_permissions_option
161 && permstatus
!= INTERDIR_PERMSTATUS
)
163 mode
= stat_info
->st_mode
;
165 /* If we created the file and it has a usual mode, then its mode
166 is normally set correctly already. But on many hosts, some
167 directories inherit the setgid bits from their parents, so we
168 we must set directories' modes explicitly. */
169 if (permstatus
== ARCHIVED_PERMSTATUS
170 && ! (mode
& ~ MODE_RWX
)
171 && typeflag
!= DIRTYPE
172 && typeflag
!= GNUTYPE_DUMPDIR
)
175 else if (! invert_permissions
)
179 /* We must inspect a directory's current permissions, since the
180 directory may have inherited its setgid bit from its parent.
182 INVERT_PERMISSIONS happens to be nonzero only for directories
183 that we created, so there's no point optimizing this code for
188 if (stat (file_name
, &st
) != 0)
190 stat_error (file_name
);
195 mode
= cur_info
->st_mode
^ invert_permissions
;
198 if (chmod (file_name
, mode
) != 0)
199 chmod_error_details (file_name
, mode
);
202 /* Check time after successfully setting FILE_NAME's time stamp to T. */
204 check_time (char const *file_name
, time_t t
)
208 WARN ((0, 0, _("%s: implausibly old time stamp %s"),
209 file_name
, tartime (t
)));
210 else if (start_time
< t
&& (now
= time (0)) < t
)
211 WARN ((0, 0, _("%s: time stamp %s is %lu s in the future"),
212 file_name
, tartime (t
), (unsigned long) (t
- now
)));
215 /* Restore stat attributes (owner, group, mode and times) for
216 FILE_NAME, using information given in *STAT_INFO.
217 If CUR_INFO is nonzero, *CUR_INFO is the
218 file's currernt status.
219 If not restoring permissions, invert the
220 INVERT_PERMISSIONS bits from the file's current permissions.
221 PERMSTATUS specifies the status of the file's permissions.
222 TYPEFLAG specifies the type of the file. */
224 /* FIXME: About proper restoration of symbolic link attributes, we still do
225 not have it right. Pretesters' reports tell us we need further study and
226 probably more configuration. For now, just use lchown if it exists, and
227 punt for the rest. Sigh! */
230 set_stat (char const *file_name
,
231 struct stat
const *stat_info
,
232 struct stat
const *cur_info
,
233 mode_t invert_permissions
, enum permstatus permstatus
,
236 struct utimbuf utimbuf
;
238 if (typeflag
!= SYMTYPE
)
240 /* We do the utime before the chmod because some versions of utime are
241 broken and trash the modes of the file. */
243 if (! touch_option
&& permstatus
!= INTERDIR_PERMSTATUS
)
245 /* We set the accessed time to `now', which is really the time we
246 started extracting files, unless incremental_option is used, in
247 which case .st_atime is used. */
249 /* FIXME: incremental_option should set ctime too, but how? */
251 if (incremental_option
)
252 utimbuf
.actime
= stat_info
->st_atime
;
254 utimbuf
.actime
= start_time
;
256 utimbuf
.modtime
= stat_info
->st_mtime
;
258 if (utime (file_name
, &utimbuf
) < 0)
259 utime_error (file_name
);
262 check_time (file_name
, utimbuf
.actime
);
263 check_time (file_name
, utimbuf
.modtime
);
267 /* Some systems allow non-root users to give files away. Once this
268 done, it is not possible anymore to change file permissions, so we
269 have to set permissions prior to possibly giving files away. */
271 set_mode (file_name
, stat_info
, cur_info
,
272 invert_permissions
, permstatus
, typeflag
);
275 if (0 < same_owner_option
&& permstatus
!= INTERDIR_PERMSTATUS
)
277 /* When lchown exists, it should be used to change the attributes of
278 the symbolic link itself. In this case, a mere chown would change
279 the attributes of the file the symbolic link is pointing to, and
280 should be avoided. */
282 if (typeflag
== SYMTYPE
)
285 if (lchown (file_name
, stat_info
->st_uid
, stat_info
->st_gid
) < 0)
286 chown_error_details (file_name
,
287 stat_info
->st_uid
, stat_info
->st_gid
);
292 if (chown (file_name
, stat_info
->st_uid
, stat_info
->st_gid
) < 0)
293 chown_error_details (file_name
,
294 stat_info
->st_uid
, stat_info
->st_gid
);
296 /* On a few systems, and in particular, those allowing to give files
297 away, changing the owner or group destroys the suid or sgid bits.
298 So let's attempt setting these bits once more. */
299 if (stat_info
->st_mode
& (S_ISUID
| S_ISGID
| S_ISVTX
))
300 set_mode (file_name
, stat_info
, 0,
301 invert_permissions
, permstatus
, typeflag
);
306 /* Remember to restore stat attributes (owner, group, mode and times)
307 for the directory FILE_NAME, using information given in *STAT_INFO,
308 once we stop extracting files into that directory.
309 If not restoring permissions, remember to invert the
310 INVERT_PERMISSIONS bits from the file's current permissions.
311 PERMSTATUS specifies the status of the file's permissions. */
313 delay_set_stat (char const *file_name
, struct stat
const *stat_info
,
314 mode_t invert_permissions
, enum permstatus permstatus
)
316 size_t file_name_len
= strlen (file_name
);
317 struct delayed_set_stat
*data
=
318 xmalloc (offsetof (struct delayed_set_stat
, file_name
)
319 + file_name_len
+ 1);
320 data
->file_name_len
= file_name_len
;
321 strcpy (data
->file_name
, file_name
);
322 data
->invert_permissions
= invert_permissions
;
323 data
->permstatus
= permstatus
;
324 data
->after_symlinks
= 0;
325 data
->stat_info
= *stat_info
;
326 data
->next
= delayed_set_stat_head
;
327 delayed_set_stat_head
= data
;
330 /* Update the delayed_set_stat info for an intermediate directory
331 created within the file name of DIR. The intermediate directory turned
332 out to be the same as this directory, e.g. due to ".." or symbolic
333 links. *DIR_STAT_INFO is the status of the directory. */
335 repair_delayed_set_stat (char const *dir
,
336 struct stat
const *dir_stat_info
)
338 struct delayed_set_stat
*data
;
339 for (data
= delayed_set_stat_head
; data
; data
= data
->next
)
342 if (stat (data
->file_name
, &st
) != 0)
344 stat_error (data
->file_name
);
348 if (st
.st_dev
== dir_stat_info
->st_dev
349 && st
.st_ino
== dir_stat_info
->st_ino
)
351 data
->stat_info
= current_stat_info
.stat
;
352 data
->invert_permissions
=
353 (MODE_RWX
& (current_stat_info
.stat
.st_mode
^ st
.st_mode
));
354 data
->permstatus
= ARCHIVED_PERMSTATUS
;
359 ERROR ((0, 0, _("%s: Unexpected inconsistency when making directory"),
360 quotearg_colon (dir
)));
363 /* After a file/link/symlink/directory creation has failed, see if
364 it's because some required directory was not present, and if so,
365 create all required directories. Return non-zero if a directory
368 make_directories (char *file_name
)
370 char *cursor0
= file_name
+ FILESYSTEM_PREFIX_LEN (file_name
);
371 char *cursor
; /* points into the file name */
372 int did_something
= 0; /* did we do anything yet? */
374 int invert_permissions
;
378 for (cursor
= cursor0
; *cursor
; cursor
++)
380 if (! ISSLASH (*cursor
))
383 /* Avoid mkdir of empty string, if leading or double '/'. */
385 if (cursor
== cursor0
|| ISSLASH (cursor
[-1]))
388 /* Avoid mkdir where last part of file name is "." or "..". */
390 if (cursor
[-1] == '.'
391 && (cursor
== cursor0
+ 1 || ISSLASH (cursor
[-2])
392 || (cursor
[-2] == '.'
393 && (cursor
== cursor0
+ 2 || ISSLASH (cursor
[-3])))))
396 *cursor
= '\0'; /* truncate the name there */
397 mode
= MODE_RWX
& ~ newdir_umask
;
398 invert_permissions
= we_are_root
? 0 : MODE_WXUSR
& ~ mode
;
399 status
= mkdir (file_name
, mode
^ invert_permissions
);
403 /* Create a struct delayed_set_stat even if
404 invert_permissions is zero, because
405 repair_delayed_set_stat may need to update the struct. */
406 delay_set_stat (file_name
,
407 ¤t_stat_info
.stat
/* ignored */,
408 invert_permissions
, INTERDIR_PERMSTATUS
);
410 print_for_mkdir (file_name
, cursor
- file_name
, mode
);
420 continue; /* Directory already exists. */
421 else if ((errno
== ENOSYS
/* Automounted dirs on Solaris return
422 this. Reported by Warren Hyde
423 <Warren.Hyde@motorola.com> */
424 || ERRNO_IS_EACCES
) /* Turbo C mkdir gives a funny errno. */
425 && access (file_name
, W_OK
) == 0)
428 /* Some other error in the mkdir. We return to the caller. */
432 return did_something
; /* tell them to retry if we made one */
436 file_newer_p (const char *file_name
, struct tar_stat_info
*tar_stat
)
440 if (stat (file_name
, &st
))
442 stat_warn (file_name
);
443 return true; /* Be on the safe side */
445 if (!S_ISDIR (st
.st_mode
)
446 && st
.st_mtime
>= tar_stat
->stat
.st_mtime
)
453 /* Prepare to extract a file.
454 Return zero if extraction should not proceed. */
457 prepare_to_extract (char const *file_name
)
459 if (to_stdout_option
)
462 switch (old_files_option
)
464 case UNLINK_FIRST_OLD_FILES
:
465 if (!remove_any_file (file_name
, recursive_unlink_option
)
466 && errno
&& errno
!= ENOENT
)
468 unlink_error (file_name
);
473 case KEEP_NEWER_FILES
:
474 if (file_newer_p (file_name
, ¤t_stat_info
))
476 WARN ((0, 0, _("Current `%s' is newer"), file_name
));
488 /* Attempt repairing what went wrong with the extraction. Delete an
489 already existing file or create missing intermediate directories.
490 Return nonzero if we somewhat increased our chances at a successful
491 extraction. errno is properly restored on zero return. */
493 maybe_recoverable (char *file_name
, int *interdir_made
)
503 /* Remove an old file, if the options allow this. */
505 switch (old_files_option
)
510 case KEEP_NEWER_FILES
:
511 if (file_newer_p (file_name
, ¤t_stat_info
))
518 case DEFAULT_OLD_FILES
:
519 case NO_OVERWRITE_DIR_OLD_FILES
:
520 case OVERWRITE_OLD_FILES
:
522 int r
= remove_any_file (file_name
, 0);
527 case UNLINK_FIRST_OLD_FILES
:
532 /* Attempt creating missing intermediate directories. */
533 if (! make_directories (file_name
))
542 /* Just say we can't do anything about it... */
548 /* Fix the statuses of all directories whose statuses need fixing, and
549 which are not ancestors of FILE_NAME. If AFTER_SYMLINKS is
550 nonzero, do this for all such directories; otherwise, stop at the
551 first directory that is marked to be fixed up only after delayed
552 symlinks are applied. */
554 apply_nonancestor_delayed_set_stat (char const *file_name
, bool after_symlinks
)
556 size_t file_name_len
= strlen (file_name
);
557 bool check_for_renamed_directories
= 0;
559 while (delayed_set_stat_head
)
561 struct delayed_set_stat
*data
= delayed_set_stat_head
;
562 bool skip_this_one
= 0;
564 struct stat
const *cur_info
= 0;
566 check_for_renamed_directories
|= data
->after_symlinks
;
568 if (after_symlinks
< data
->after_symlinks
569 || (data
->file_name_len
< file_name_len
570 && file_name
[data
->file_name_len
]
571 && (ISSLASH (file_name
[data
->file_name_len
])
572 || ISSLASH (file_name
[data
->file_name_len
- 1]))
573 && memcmp (file_name
, data
->file_name
, data
->file_name_len
) == 0))
576 if (check_for_renamed_directories
)
579 if (stat (data
->file_name
, &st
) != 0)
581 stat_error (data
->file_name
);
584 else if (! (st
.st_dev
== data
->stat_info
.st_dev
585 && (st
.st_ino
== data
->stat_info
.st_ino
)))
588 _("%s: Directory renamed before its status could be extracted"),
589 quotearg_colon (data
->file_name
)));
595 set_stat (data
->file_name
, &data
->stat_info
, cur_info
,
596 data
->invert_permissions
, data
->permstatus
, DIRTYPE
);
598 delayed_set_stat_head
= data
->next
;
603 /* Extract a file from the archive. */
605 extract_archive (void)
607 union block
*data_block
;
615 int interdir_made
= 0;
619 set_next_block_after (current_header
);
620 decode_header (current_header
, ¤t_stat_info
, ¤t_format
, 1);
622 if (interactive_option
&& !confirm ("extract", current_stat_info
.file_name
))
628 /* Print the block from current_header and current_stat. */
631 print_header (¤t_stat_info
, -1);
633 file_name
= safer_name_suffix (current_stat_info
.file_name
, false);
634 if (strip_name_components
)
636 size_t prefix_len
= stripped_prefix_len (file_name
, strip_name_components
);
637 if (prefix_len
== (size_t) -1)
642 file_name
+= prefix_len
;
645 apply_nonancestor_delayed_set_stat (file_name
, 0);
647 /* Take a safety backup of a previously existing file. */
649 if (backup_option
&& !to_stdout_option
)
650 if (!maybe_backup_file (file_name
, 0))
653 ERROR ((0, e
, _("%s: Was unable to backup this file"),
654 quotearg_colon (file_name
)));
659 /* Extract the archive entry according to its type. */
662 typeflag
= sparse_member_p (¤t_stat_info
) ?
663 GNUTYPE_SPARSE
: current_header
->header
.typeflag
;
674 /* Appears to be a file. But BSD tar uses the convention that a slash
675 suffix means a directory. */
677 if (current_stat_info
.had_trailing_slash
)
680 /* FIXME: deal with protection issues. */
683 openflag
= (O_WRONLY
| O_BINARY
| O_CREAT
684 | (old_files_option
== OVERWRITE_OLD_FILES
687 mode
= current_stat_info
.stat
.st_mode
& MODE_RWX
& ~ current_umask
;
689 if (to_stdout_option
)
695 if (! prepare_to_extract (file_name
))
704 /* Contiguous files (on the Masscomp) have to specify the size in
705 the open call that creates them. */
707 if (typeflag
== CONTTYPE
)
708 fd
= open (file_name
, openflag
| O_CTG
, mode
, current_stat_info
.stat
.st_size
);
710 fd
= open (file_name
, openflag
, mode
);
712 #else /* not O_CTG */
713 if (typeflag
== CONTTYPE
)
715 static int conttype_diagnosed
;
717 if (!conttype_diagnosed
)
719 conttype_diagnosed
= 1;
720 WARN ((0, 0, _("Extracting contiguous files as regular files")));
723 fd
= open (file_name
, openflag
, mode
);
725 #endif /* not O_CTG */
729 if (maybe_recoverable (file_name
, &interdir_made
))
732 open_error (file_name
);
740 if (current_stat_info
.is_sparse
)
742 sparse_extract_file (fd
, ¤t_stat_info
, &size
);
745 for (size
= current_stat_info
.stat
.st_size
; size
> 0; )
747 if (multi_volume_option
)
749 assign_string (&save_name
, current_stat_info
.file_name
);
750 save_totsize
= current_stat_info
.stat
.st_size
;
751 save_sizeleft
= size
;
754 /* Locate data, determine max length writeable, write it,
755 block that we have used the data, then check if the write
758 data_block
= find_next_block ();
761 ERROR ((0, 0, _("Unexpected EOF in archive")));
762 break; /* FIXME: What happens, then? */
765 written
= available_space_after (data_block
);
770 count
= full_write (fd
, data_block
->buffer
, written
);
773 set_next_block_after ((union block
*)
774 (data_block
->buffer
+ written
- 1));
775 if (count
!= written
)
777 write_error_details (file_name
, count
, written
);
784 if (multi_volume_option
)
785 assign_string (&save_name
, 0);
787 /* If writing to stdout, don't try to do anything to the filename;
788 it doesn't exist, or we don't want to touch it anyway. */
790 if (to_stdout_option
)
796 close_error (file_name
);
801 set_stat (file_name
, ¤t_stat_info
.stat
, 0, 0,
802 (old_files_option
== OVERWRITE_OLD_FILES
804 : ARCHIVED_PERMSTATUS
),
810 if (! prepare_to_extract (file_name
))
813 if (absolute_names_option
814 || ! (ISSLASH (current_stat_info
.link_name
815 [FILESYSTEM_PREFIX_LEN (current_stat_info
.link_name
)])
816 || contains_dot_dot (current_stat_info
.link_name
)))
818 while (status
= symlink (current_stat_info
.link_name
, file_name
),
820 if (!maybe_recoverable (file_name
, &interdir_made
))
824 set_stat (file_name
, ¤t_stat_info
.stat
, 0, 0, 0, SYMTYPE
);
826 symlink_error (current_stat_info
.link_name
, file_name
);
830 /* This symbolic link is potentially dangerous. Don't
831 create it now; instead, create a placeholder file, which
832 will be replaced after other extraction is done. */
835 while (fd
= open (file_name
, O_WRONLY
| O_CREAT
| O_EXCL
, 0),
837 if (! maybe_recoverable (file_name
, &interdir_made
))
842 open_error (file_name
);
843 else if (fstat (fd
, &st
) != 0)
845 stat_error (file_name
);
848 else if (close (fd
) != 0)
849 close_error (file_name
);
852 struct delayed_set_stat
*h
;
853 struct delayed_symlink
*p
=
854 xmalloc (offsetof (struct delayed_symlink
, target
)
855 + strlen (current_stat_info
.link_name
) + 1);
856 p
->next
= delayed_symlink_head
;
857 delayed_symlink_head
= p
;
860 p
->mtime
= st
.st_mtime
;
861 p
->uid
= current_stat_info
.stat
.st_uid
;
862 p
->gid
= current_stat_info
.stat
.st_gid
;
863 p
->sources
= xmalloc (offsetof (struct string_list
, string
)
864 + strlen (file_name
) + 1);
865 p
->sources
->next
= 0;
866 strcpy (p
->sources
->string
, file_name
);
867 strcpy (p
->target
, current_stat_info
.link_name
);
869 h
= delayed_set_stat_head
;
870 if (h
&& ! h
->after_symlinks
871 && strncmp (file_name
, h
->file_name
, h
->file_name_len
) == 0
872 && ISSLASH (file_name
[h
->file_name_len
])
873 && (base_name (file_name
)
874 == file_name
+ h
->file_name_len
+ 1))
878 h
->after_symlinks
= 1;
880 if (stat (h
->file_name
, &st
) != 0)
881 stat_error (h
->file_name
);
884 h
->stat_info
.st_dev
= st
.st_dev
;
885 h
->stat_info
.st_ino
= st
.st_ino
;
888 while ((h
= h
->next
) && ! h
->after_symlinks
);
895 if (status
!= 0 && backup_option
)
901 static int warned_once
;
907 _("Attempting extraction of symbolic links as hard links")));
915 if (! prepare_to_extract (file_name
))
920 char const *link_name
= safer_name_suffix (current_stat_info
.link_name
,
922 struct stat st1
, st2
;
925 /* MSDOS does not implement links. However, djgpp's link() actually
927 status
= link (link_name
, file_name
);
932 struct delayed_symlink
*ds
= delayed_symlink_head
;
933 if (ds
&& lstat (link_name
, &st1
) == 0)
934 for (; ds
; ds
= ds
->next
)
935 if (ds
->dev
== st1
.st_dev
936 && ds
->ino
== st1
.st_ino
937 && ds
->mtime
== st1
.st_mtime
)
939 struct string_list
*p
=
940 xmalloc (offsetof (struct string_list
, string
)
941 + strlen (file_name
) + 1);
942 strcpy (p
->string
, file_name
);
943 p
->next
= ds
->sources
;
950 if ((e
== EEXIST
&& strcmp (link_name
, file_name
) == 0)
951 || (lstat (link_name
, &st1
) == 0
952 && lstat (file_name
, &st2
) == 0
953 && st1
.st_dev
== st2
.st_dev
954 && st1
.st_ino
== st2
.st_ino
))
958 if (maybe_recoverable (file_name
, &interdir_made
))
961 if (incremental_option
&& errno
== EEXIST
)
964 link_error (link_name
, file_name
);
972 current_stat_info
.stat
.st_mode
|= S_IFCHR
;
978 current_stat_info
.stat
.st_mode
|= S_IFBLK
;
981 #if S_IFCHR || S_IFBLK
983 if (! prepare_to_extract (file_name
))
986 status
= mknod (file_name
, current_stat_info
.stat
.st_mode
,
987 current_stat_info
.stat
.st_rdev
);
990 if (maybe_recoverable (file_name
, &interdir_made
))
992 mknod_error (file_name
);
997 set_stat (file_name
, ¤t_stat_info
.stat
, 0, 0,
998 ARCHIVED_PERMSTATUS
, typeflag
);
1002 #if HAVE_MKFIFO || defined mkfifo
1004 if (! prepare_to_extract (file_name
))
1007 while (status
= mkfifo (file_name
, current_stat_info
.stat
.st_mode
),
1009 if (!maybe_recoverable (file_name
, &interdir_made
))
1013 set_stat (file_name
, ¤t_stat_info
.stat
, NULL
, 0,
1014 ARCHIVED_PERMSTATUS
, typeflag
);
1017 mkfifo_error (file_name
);
1019 undo_last_backup ();
1025 case GNUTYPE_DUMPDIR
:
1027 if (incremental_option
)
1029 /* Read the entry and delete files that aren't listed in the
1032 purge_directory (file_name
);
1034 else if (typeflag
== GNUTYPE_DUMPDIR
)
1037 mode
= ((current_stat_info
.stat
.st_mode
1038 | (we_are_root
? 0 : MODE_WXUSR
))
1041 status
= prepare_to_extract (file_name
);
1045 goto directory_exists
;
1048 status
= mkdir (file_name
, mode
);
1054 || old_files_option
== DEFAULT_OLD_FILES
1055 || old_files_option
== OVERWRITE_OLD_FILES
))
1058 if (stat (file_name
, &st
) == 0)
1062 repair_delayed_set_stat (file_name
, &st
);
1065 if (S_ISDIR (st
.st_mode
))
1067 mode
= st
.st_mode
& ~ current_umask
;
1068 goto directory_exists
;
1074 if (maybe_recoverable (file_name
, &interdir_made
))
1077 if (errno
!= EEXIST
)
1079 mkdir_error (file_name
);
1081 undo_last_backup ();
1088 || old_files_option
== DEFAULT_OLD_FILES
1089 || old_files_option
== OVERWRITE_OLD_FILES
)
1090 delay_set_stat (file_name
, ¤t_stat_info
.stat
,
1091 MODE_RWX
& (mode
^ current_stat_info
.stat
.st_mode
),
1093 ? ARCHIVED_PERMSTATUS
1094 : UNKNOWN_PERMSTATUS
));
1097 case GNUTYPE_VOLHDR
:
1099 fprintf (stdlis
, _("Reading %s\n"), quote (current_stat_info
.file_name
));
1106 case GNUTYPE_MULTIVOL
:
1108 _("%s: Cannot extract -- file is continued from another volume"),
1109 quotearg_colon (current_stat_info
.file_name
)));
1112 undo_last_backup ();
1115 case GNUTYPE_LONGNAME
:
1116 case GNUTYPE_LONGLINK
:
1117 ERROR ((0, 0, _("Visible long name error")));
1120 undo_last_backup ();
1125 _("%s: Unknown file type '%c', extracted as normal file"),
1126 quotearg_colon (file_name
), typeflag
));
1131 /* Extract the symbolic links whose final extraction were delayed. */
1133 apply_delayed_symlinks (void)
1135 struct delayed_symlink
*ds
;
1137 for (ds
= delayed_symlink_head
; ds
; )
1139 struct string_list
*sources
= ds
->sources
;
1140 char const *valid_source
= 0;
1142 for (sources
= ds
->sources
; sources
; sources
= sources
->next
)
1144 char const *source
= sources
->string
;
1147 /* Make sure the placeholder file is still there. If not,
1148 don't create a symlink, as the placeholder was probably
1149 removed by a later extraction. */
1150 if (lstat (source
, &st
) == 0
1151 && st
.st_dev
== ds
->dev
1152 && st
.st_ino
== ds
->ino
1153 && st
.st_mtime
== ds
->mtime
)
1155 /* Unlink the placeholder, then create a hard link if possible,
1156 a symbolic link otherwise. */
1157 if (unlink (source
) != 0)
1158 unlink_error (source
);
1159 else if (valid_source
&& link (valid_source
, source
) == 0)
1161 else if (symlink (ds
->target
, source
) != 0)
1162 symlink_error (ds
->target
, source
);
1165 valid_source
= source
;
1166 st
.st_uid
= ds
->uid
;
1167 st
.st_gid
= ds
->gid
;
1168 set_stat (source
, &st
, 0, 0, 0, SYMTYPE
);
1173 for (sources
= ds
->sources
; sources
; )
1175 struct string_list
*next
= sources
->next
;
1181 struct delayed_symlink
*next
= ds
->next
;
1187 delayed_symlink_head
= 0;
1190 /* Finish the extraction of an archive. */
1192 extract_finish (void)
1194 /* First, fix the status of ordinary directories that need fixing. */
1195 apply_nonancestor_delayed_set_stat ("", 0);
1197 /* Then, apply delayed symlinks, so that they don't affect delayed
1198 directory status-setting for ordinary directories. */
1199 apply_delayed_symlinks ();
1201 /* Finally, fix the status of directories that are ancestors
1202 of delayed symlinks. */
1203 apply_nonancestor_delayed_set_stat ("", 1);
1210 error (TAREXIT_FAILURE
, 0, _("Error is not recoverable: exiting now"));