/* Extract files from a tar archive.
Copyright (C) 1988, 1992, 1993, 1994, 1996, 1997, 1998, 1999, 2000,
- 2001, 2003, 2004, 2005 Free Software Foundation, Inc.
+ 2001, 2003, 2004, 2005, 2006 Free Software Foundation, Inc.
Written by John Gilmore, on 1985-11-19.
static bool we_are_root; /* true if our effective uid == 0 */
static mode_t newdir_umask; /* umask when creating new directories */
static mode_t current_umask; /* current umask (which is set to 0 if -p) */
-static bool directories_first; /* Directory members precede non-directory
- ones in the archive. This is detected for
- incremental archives only. This variable
- helps correctly restore directory
- timestamps */
/* Status of the permissions of a file that we are extracting. */
enum permstatus
NOTICE: this works only if the archive has usual member order, i.e.
directory, then the files in that directory. Incremental archive have
somewhat reversed order: first go subdirectories, then all other
- members. To help cope with this case the variable directories_first
- is set by prepare_to_extract.
+ members. To help cope with this case the variable
+ delay_directory_restore_option is set by prepare_to_extract.
If an archive was explicitely created so that its member order is
reversed, some directory timestamps can be restored incorrectly,
e.g.:
- tar --no-recursion -cf archive dir dir/subdir dir/subdir/file
+ tar --no-recursion -cf archive dir dir/file1 foo dir/file2
*/
static void
delay_set_stat (char const *file_name, struct tar_stat_info const *st,
make_directories (char *file_name)
{
char *cursor0 = file_name + FILE_SYSTEM_PREFIX_LEN (file_name);
- char *cursor; /* points into the file name */
+ char *cursor; /* points into the file name */
int did_something = 0; /* did we do anything yet? */
int mode;
int invert_permissions;
int status;
-
for (cursor = cursor0; *cursor; cursor++)
{
if (! ISSLASH (*cursor))
invert_permissions is zero, because
repair_delayed_set_stat may need to update the struct. */
delay_set_stat (file_name,
- ¤t_stat_info /* ignored */,
+ ¤t_stat_info,
invert_permissions, INTERDIR_PERMSTATUS);
print_for_mkdir (file_name, cursor - file_name, mode);
}
if (S_ISDIR (st.st_mode))
{
- mode = st.st_mode & ~ current_umask;
+ mode = st.st_mode;
break;
}
}
if (status == 0
|| old_files_option == DEFAULT_OLD_FILES
|| old_files_option == OVERWRITE_OLD_FILES)
- delay_set_stat (file_name, ¤t_stat_info,
- MODE_RWX & (mode ^ current_stat_info.stat.st_mode),
- (status == 0
- ? ARCHIVED_PERMSTATUS
- : UNKNOWN_PERMSTATUS));
-
+ {
+ if (status == 0)
+ delay_set_stat (file_name, ¤t_stat_info,
+ MODE_RWX & (mode ^ current_stat_info.stat.st_mode),
+ ARCHIVED_PERMSTATUS);
+ else /* For an already existing directory, invert_perms must be 0 */
+ delay_set_stat (file_name, ¤t_stat_info,
+ 0,
+ UNKNOWN_PERMSTATUS);
+ }
return status;
}
for (size = current_stat_info.stat.st_size; size > 0; )
{
mv_size_left (size);
-
+
/* Locate data, determine max length writeable, write it,
block that we have used the data, then check if the write
worked. */
-
+
data_block = find_next_block ();
if (! data_block)
{
ERROR ((0, 0, _("Unexpected EOF in archive")));
break; /* FIXME: What happens, then? */
}
-
+
written = available_space_after (data_block);
-
+
if (written > size)
written = size;
errno = 0;
count = full_write (fd, data_block->buffer, written);
size -= written;
-
+
set_next_block_after ((union block *)
(data_block->buffer + written - 1));
if (count != written)
skip_file (size);
mv_end ();
-
+
/* If writing to stdout, don't try to do anything to the filename;
it doesn't exist, or we don't want to touch it anyway. */
case DIRTYPE:
case GNUTYPE_DUMPDIR:
*fun = extract_dir;
- if (current_stat_info.dumpdir)
- directories_first = true;
+ if (current_stat_info.is_dumpdir)
+ delay_directory_restore_option = true;
break;
case GNUTYPE_VOLHDR:
/* Restore stats for all non-ancestor directories, unless
it is an incremental archive.
(see NOTICE in the comment to delay_set_stat above) */
- if (!directories_first)
+ if (!delay_directory_restore_option)
apply_nonancestor_delayed_set_stat (file_name, 0);
-
+
/* Take a safety backup of a previously existing file. */
if (backup_option)
apply_nonancestor_delayed_set_stat ("", 1);
}
+bool
+rename_directory (char *src, char *dst)
+{
+ if (rename (src, dst))
+ {
+ int e = errno;
+
+ switch (e)
+ {
+ case ENOENT:
+ if (make_directories (dst))
+ {
+ if (rename (src, dst) == 0)
+ return true;
+ e = errno;
+ }
+ break;
+
+ case EXDEV:
+ /* FIXME: Fall back to recursive copying */
+
+ default:
+ break;
+ }
+
+ ERROR ((0, e, _("Cannot rename %s to %s"),
+ quote_n (0, src),
+ quote_n (1, dst)));
+ return false;
+ }
+ return true;
+}
+
void
fatal_exit (void)
{
projects / chaz / tar / blobdiff