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. */
39 bool we_are_root; /* true if our effective uid == 0 */
40 static mode_t newdir_umask; /* umask when creating new directories */
41 static mode_t current_umask; /* current umask (which is set to 0 if -p) */
43 /* Status of the permissions of a file that we are extracting. */
46 /* This file may have existed already; its permissions are unknown. */
49 /* This file was created using the permissions from the archive. */
52 /* This is an intermediate directory; the archive did not specify
57 /* List of directories whose statuses we need to extract after we've
58 finished extracting their subsidiary files. If you consider each
59 contiguous subsequence of elements of the form [D]?[^D]*, where [D]
60 represents an element where AFTER_SYMLINKS is nonzero and [^D]
61 represents an element where AFTER_SYMLINKS is zero, then the head
62 of the subsequence has the longest name, and each non-head element
63 in the prefix is an ancestor (in the directory hierarchy) of the
66 struct delayed_set_stat
68 struct delayed_set_stat *next;
69 struct stat stat_info;
71 mode_t invert_permissions;
72 enum permstatus permstatus;
77 static struct delayed_set_stat *delayed_set_stat_head;
79 /* List of symbolic links whose creation we have delayed. */
80 struct delayed_symlink
82 /* The next delayed symbolic link in the list. */
83 struct delayed_symlink *next;
85 /* The device, inode number and last-modified time of the placeholder. */
90 /* The desired owner and group of the symbolic link. */
94 /* A list of sources for this symlink. The sources are all to be
95 hard-linked together. */
96 struct string_list *sources;
98 /* The desired target of the desired link. */
102 static struct delayed_symlink *delayed_symlink_head;
106 struct string_list *next;
110 /* Set up to extract files. */
114 we_are_root = geteuid () == 0;
115 same_permissions_option += we_are_root;
116 same_owner_option += we_are_root;
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 + FILE_SYSTEM_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,
466 recursive_unlink_option ? RECURSIVE_REMOVE_OPTION
467 : ORDINARY_REMOVE_OPTION)
468 && errno && errno != ENOENT)
470 unlink_error (file_name);
475 case KEEP_NEWER_FILES:
476 if (file_newer_p (file_name, ¤t_stat_info))
478 WARN ((0, 0, _("Current `%s' is newer"), file_name));
490 /* Attempt repairing what went wrong with the extraction. Delete an
491 already existing file or create missing intermediate directories.
492 Return nonzero if we somewhat increased our chances at a successful
493 extraction. errno is properly restored on zero return. */
495 maybe_recoverable (char *file_name, int *interdir_made)
505 /* Remove an old file, if the options allow this. */
507 switch (old_files_option)
512 case KEEP_NEWER_FILES:
513 if (file_newer_p (file_name, ¤t_stat_info))
520 case DEFAULT_OLD_FILES:
521 case NO_OVERWRITE_DIR_OLD_FILES:
522 case OVERWRITE_OLD_FILES:
524 int r = remove_any_file (file_name, ORDINARY_REMOVE_OPTION);
529 case UNLINK_FIRST_OLD_FILES:
534 /* Attempt creating missing intermediate directories. */
535 if (! make_directories (file_name))
544 /* Just say we can't do anything about it... */
550 /* Fix the statuses of all directories whose statuses need fixing, and
551 which are not ancestors of FILE_NAME. If AFTER_SYMLINKS is
552 nonzero, do this for all such directories; otherwise, stop at the
553 first directory that is marked to be fixed up only after delayed
554 symlinks are applied. */
556 apply_nonancestor_delayed_set_stat (char const *file_name, bool after_symlinks)
558 size_t file_name_len = strlen (file_name);
559 bool check_for_renamed_directories = 0;
561 while (delayed_set_stat_head)
563 struct delayed_set_stat *data = delayed_set_stat_head;
564 bool skip_this_one = 0;
566 struct stat const *cur_info = 0;
568 check_for_renamed_directories |= data->after_symlinks;
570 if (after_symlinks < data->after_symlinks
571 || (data->file_name_len < file_name_len
572 && file_name[data->file_name_len]
573 && (ISSLASH (file_name[data->file_name_len])
574 || ISSLASH (file_name[data->file_name_len - 1]))
575 && memcmp (file_name, data->file_name, data->file_name_len) == 0))
578 if (check_for_renamed_directories)
581 if (stat (data->file_name, &st) != 0)
583 stat_error (data->file_name);
586 else if (! (st.st_dev == data->stat_info.st_dev
587 && (st.st_ino == data->stat_info.st_ino)))
590 _("%s: Directory renamed before its status could be extracted"),
591 quotearg_colon (data->file_name)));
597 set_stat (data->file_name, &data->stat_info, cur_info,
598 data->invert_permissions, data->permstatus, DIRTYPE);
600 delayed_set_stat_head = data->next;
605 /* Extract a file from the archive. */
607 extract_archive (void)
609 union block *data_block;
617 int interdir_made = 0;
621 set_next_block_after (current_header);
622 decode_header (current_header, ¤t_stat_info, ¤t_format, 1);
624 if (interactive_option && !confirm ("extract", current_stat_info.file_name))
630 /* Print the block from current_header and current_stat. */
633 print_header (¤t_stat_info, -1);
635 file_name = safer_name_suffix (current_stat_info.file_name, false);
636 if (strip_name_components)
638 size_t prefix_len = stripped_prefix_len (file_name, strip_name_components);
639 if (prefix_len == (size_t) -1)
644 file_name += prefix_len;
647 apply_nonancestor_delayed_set_stat (file_name, 0);
649 /* Take a safety backup of a previously existing file. */
651 if (backup_option && !to_stdout_option)
652 if (!maybe_backup_file (file_name, 0))
655 ERROR ((0, e, _("%s: Was unable to backup this file"),
656 quotearg_colon (file_name)));
661 /* Extract the archive entry according to its type. */
664 typeflag = sparse_member_p (¤t_stat_info) ?
665 GNUTYPE_SPARSE : current_header->header.typeflag;
676 /* Appears to be a file. But BSD tar uses the convention that a slash
677 suffix means a directory. */
679 if (current_stat_info.had_trailing_slash)
682 /* FIXME: deal with protection issues. */
685 openflag = (O_WRONLY | O_BINARY | O_CREAT
686 | (old_files_option == OVERWRITE_OLD_FILES
689 mode = current_stat_info.stat.st_mode & MODE_RWX & ~ current_umask;
691 if (to_stdout_option)
697 if (! prepare_to_extract (file_name))
706 /* Contiguous files (on the Masscomp) have to specify the size in
707 the open call that creates them. */
709 if (typeflag == CONTTYPE)
710 fd = open (file_name, openflag | O_CTG, mode, current_stat_info.stat.st_size);
712 fd = open (file_name, openflag, mode);
714 #else /* not O_CTG */
715 if (typeflag == CONTTYPE)
717 static int conttype_diagnosed;
719 if (!conttype_diagnosed)
721 conttype_diagnosed = 1;
722 WARN ((0, 0, _("Extracting contiguous files as regular files")));
725 fd = open (file_name, openflag, mode);
727 #endif /* not O_CTG */
731 if (maybe_recoverable (file_name, &interdir_made))
734 open_error (file_name);
742 if (current_stat_info.is_sparse)
744 sparse_extract_file (fd, ¤t_stat_info, &size);
747 for (size = current_stat_info.stat.st_size; size > 0; )
749 if (multi_volume_option)
751 assign_string (&save_name, current_stat_info.file_name);
752 save_totsize = current_stat_info.stat.st_size;
753 save_sizeleft = size;
756 /* Locate data, determine max length writeable, write it,
757 block that we have used the data, then check if the write
760 data_block = find_next_block ();
763 ERROR ((0, 0, _("Unexpected EOF in archive")));
764 break; /* FIXME: What happens, then? */
767 written = available_space_after (data_block);
772 count = full_write (fd, data_block->buffer, written);
775 set_next_block_after ((union block *)
776 (data_block->buffer + written - 1));
777 if (count != written)
779 write_error_details (file_name, count, written);
786 if (multi_volume_option)
787 assign_string (&save_name, 0);
789 /* If writing to stdout, don't try to do anything to the filename;
790 it doesn't exist, or we don't want to touch it anyway. */
792 if (to_stdout_option)
798 close_error (file_name);
803 set_stat (file_name, ¤t_stat_info.stat, 0, 0,
804 (old_files_option == OVERWRITE_OLD_FILES
806 : ARCHIVED_PERMSTATUS),
812 if (! prepare_to_extract (file_name))
815 if (absolute_names_option
816 || ! (IS_ABSOLUTE_FILE_NAME (current_stat_info.link_name)
817 || contains_dot_dot (current_stat_info.link_name)))
819 while (status = symlink (current_stat_info.link_name, file_name),
821 if (!maybe_recoverable (file_name, &interdir_made))
825 set_stat (file_name, ¤t_stat_info.stat, 0, 0, 0, SYMTYPE);
827 symlink_error (current_stat_info.link_name, file_name);
831 /* This symbolic link is potentially dangerous. Don't
832 create it now; instead, create a placeholder file, which
833 will be replaced after other extraction is done. */
836 while (fd = open (file_name, O_WRONLY | O_CREAT | O_EXCL, 0),
838 if (! maybe_recoverable (file_name, &interdir_made))
843 open_error (file_name);
844 else if (fstat (fd, &st) != 0)
846 stat_error (file_name);
849 else if (close (fd) != 0)
850 close_error (file_name);
853 struct delayed_set_stat *h;
854 struct delayed_symlink *p =
855 xmalloc (offsetof (struct delayed_symlink, target)
856 + strlen (current_stat_info.link_name) + 1);
857 p->next = delayed_symlink_head;
858 delayed_symlink_head = p;
861 p->mtime = st.st_mtime;
862 p->uid = current_stat_info.stat.st_uid;
863 p->gid = current_stat_info.stat.st_gid;
864 p->sources = xmalloc (offsetof (struct string_list, string)
865 + strlen (file_name) + 1);
866 p->sources->next = 0;
867 strcpy (p->sources->string, file_name);
868 strcpy (p->target, current_stat_info.link_name);
870 h = delayed_set_stat_head;
871 if (h && ! h->after_symlinks
872 && strncmp (file_name, h->file_name, h->file_name_len) == 0
873 && ISSLASH (file_name[h->file_name_len])
874 && (base_name (file_name)
875 == file_name + h->file_name_len + 1))
879 h->after_symlinks = 1;
881 if (stat (h->file_name, &st) != 0)
882 stat_error (h->file_name);
885 h->stat_info.st_dev = st.st_dev;
886 h->stat_info.st_ino = st.st_ino;
889 while ((h = h->next) && ! h->after_symlinks);
896 if (status != 0 && backup_option)
902 static int warned_once;
908 _("Attempting extraction of symbolic links as hard links")));
916 if (! prepare_to_extract (file_name))
921 char const *link_name = safer_name_suffix (current_stat_info.link_name,
923 struct stat st1, st2;
926 /* MSDOS does not implement links. However, djgpp's link() actually
928 status = link (link_name, file_name);
933 struct delayed_symlink *ds = delayed_symlink_head;
934 if (ds && lstat (link_name, &st1) == 0)
935 for (; ds; ds = ds->next)
936 if (ds->dev == st1.st_dev
937 && ds->ino == st1.st_ino
938 && ds->mtime == st1.st_mtime)
940 struct string_list *p =
941 xmalloc (offsetof (struct string_list, string)
942 + strlen (file_name) + 1);
943 strcpy (p->string, file_name);
944 p->next = ds->sources;
951 if ((e == EEXIST && strcmp (link_name, file_name) == 0)
952 || (lstat (link_name, &st1) == 0
953 && lstat (file_name, &st2) == 0
954 && st1.st_dev == st2.st_dev
955 && st1.st_ino == st2.st_ino))
959 if (maybe_recoverable (file_name, &interdir_made))
962 if (incremental_option && errno == EEXIST)
965 link_error (link_name, file_name);
973 current_stat_info.stat.st_mode |= S_IFCHR;
979 current_stat_info.stat.st_mode |= S_IFBLK;
982 #if S_IFCHR || S_IFBLK
984 if (! prepare_to_extract (file_name))
987 status = mknod (file_name, current_stat_info.stat.st_mode,
988 current_stat_info.stat.st_rdev);
991 if (maybe_recoverable (file_name, &interdir_made))
993 mknod_error (file_name);
998 set_stat (file_name, ¤t_stat_info.stat, 0, 0,
999 ARCHIVED_PERMSTATUS, typeflag);
1003 #if HAVE_MKFIFO || defined mkfifo
1005 if (! prepare_to_extract (file_name))
1008 while (status = mkfifo (file_name, current_stat_info.stat.st_mode),
1010 if (!maybe_recoverable (file_name, &interdir_made))
1014 set_stat (file_name, ¤t_stat_info.stat, NULL, 0,
1015 ARCHIVED_PERMSTATUS, typeflag);
1018 mkfifo_error (file_name);
1020 undo_last_backup ();
1026 case GNUTYPE_DUMPDIR:
1028 if (incremental_option)
1030 /* Read the entry and delete files that aren't listed in the
1033 purge_directory (file_name);
1035 else if (typeflag == GNUTYPE_DUMPDIR)
1038 mode = ((current_stat_info.stat.st_mode
1039 | (we_are_root ? 0 : MODE_WXUSR))
1042 status = prepare_to_extract (file_name);
1046 goto directory_exists;
1049 status = mkdir (file_name, mode);
1055 || old_files_option == DEFAULT_OLD_FILES
1056 || old_files_option == OVERWRITE_OLD_FILES))
1059 if (stat (file_name, &st) == 0)
1063 repair_delayed_set_stat (file_name, &st);
1066 if (S_ISDIR (st.st_mode))
1068 mode = st.st_mode & ~ current_umask;
1069 goto directory_exists;
1075 if (maybe_recoverable (file_name, &interdir_made))
1078 if (errno != EEXIST)
1080 mkdir_error (file_name);
1082 undo_last_backup ();
1089 || old_files_option == DEFAULT_OLD_FILES
1090 || old_files_option == OVERWRITE_OLD_FILES)
1091 delay_set_stat (file_name, ¤t_stat_info.stat,
1092 MODE_RWX & (mode ^ current_stat_info.stat.st_mode),
1094 ? ARCHIVED_PERMSTATUS
1095 : UNKNOWN_PERMSTATUS));
1098 case GNUTYPE_VOLHDR:
1100 fprintf (stdlis, _("Reading %s\n"), quote (current_stat_info.file_name));
1107 case GNUTYPE_MULTIVOL:
1109 _("%s: Cannot extract -- file is continued from another volume"),
1110 quotearg_colon (current_stat_info.file_name)));
1113 undo_last_backup ();
1116 case GNUTYPE_LONGNAME:
1117 case GNUTYPE_LONGLINK:
1118 ERROR ((0, 0, _("Visible long name error")));
1121 undo_last_backup ();
1126 _("%s: Unknown file type '%c', extracted as normal file"),
1127 quotearg_colon (file_name), typeflag));
1132 /* Extract the symbolic links whose final extraction were delayed. */
1134 apply_delayed_symlinks (void)
1136 struct delayed_symlink *ds;
1138 for (ds = delayed_symlink_head; ds; )
1140 struct string_list *sources = ds->sources;
1141 char const *valid_source = 0;
1143 for (sources = ds->sources; sources; sources = sources->next)
1145 char const *source = sources->string;
1148 /* Make sure the placeholder file is still there. If not,
1149 don't create a symlink, as the placeholder was probably
1150 removed by a later extraction. */
1151 if (lstat (source, &st) == 0
1152 && st.st_dev == ds->dev
1153 && st.st_ino == ds->ino
1154 && st.st_mtime == ds->mtime)
1156 /* Unlink the placeholder, then create a hard link if possible,
1157 a symbolic link otherwise. */
1158 if (unlink (source) != 0)
1159 unlink_error (source);
1160 else if (valid_source && link (valid_source, source) == 0)
1162 else if (symlink (ds->target, source) != 0)
1163 symlink_error (ds->target, source);
1166 valid_source = source;
1167 st.st_uid = ds->uid;
1168 st.st_gid = ds->gid;
1169 set_stat (source, &st, 0, 0, 0, SYMTYPE);
1174 for (sources = ds->sources; sources; )
1176 struct string_list *next = sources->next;
1182 struct delayed_symlink *next = ds->next;
1188 delayed_symlink_head = 0;
1191 /* Finish the extraction of an archive. */
1193 extract_finish (void)
1195 /* First, fix the status of ordinary directories that need fixing. */
1196 apply_nonancestor_delayed_set_stat ("", 0);
1198 /* Then, apply delayed symlinks, so that they don't affect delayed
1199 directory status-setting for ordinary directories. */
1200 apply_delayed_symlinks ();
1202 /* Finally, fix the status of directories that are ancestors
1203 of delayed symlinks. */
1204 apply_nonancestor_delayed_set_stat ("", 1);
1211 error (TAREXIT_FAILURE, 0, _("Error is not recoverable: exiting now"));
1218 error (0, 0, "%s", _("memory exhausted"));