* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ * FIXME:
+ * In privileged mode if uname and gname map to a uid and gid then use the
+ * mapped value instead of the uid/gid values in tar header
+ *
+ * References:
+ * GNU tar and star man pages,
+ * Opengroup's ustar interchange format,
+ * http://www.opengroup.org/onlinepubs/007904975/utilities/pax.html
*/
#include <stdio.h>
#include "unarchive.h"
#include "libbb.h"
+#ifdef CONFIG_FEATURE_TAR_GNU_EXTENSIONS
+static char *longname = NULL;
+static char *linkname = NULL;
+#endif
+
extern char get_header_tar(archive_handle_t *archive_handle)
{
file_header_t *file_header = archive_handle->file_header;
union {
+ /* ustar header, Posix 1003.1 */
unsigned char raw[512];
struct {
char name[100]; /* 0-99 */
} tar;
long sum = 0;
long i;
+ static int end = 0;
/* Align header */
- archive_handle->offset += data_align(archive_handle->src_fd, archive_handle->offset, 512);
+ data_align(archive_handle, 512);
- if (xread_all_eof(archive_handle->src_fd, tar.raw, 512) == 0) {
- /* End of file */
+ if (bb_full_read(archive_handle->src_fd, tar.raw, 512) != 512) {
+ /* Assume end of file */
return(EXIT_FAILURE);
}
archive_handle->offset += 512;
/* If there is no filename its an empty header */
if (tar.formated.name[0] == 0) {
+ if (end) {
+ /* This is the second consecutive empty header! End of archive!
+ * Read until the end to empty the pipe from gz or bz2
+ */
+ while (bb_full_read(archive_handle->src_fd, tar.raw, 512) == 512);
+ return(EXIT_FAILURE);
+ }
+ end = 1;
return(EXIT_SUCCESS);
}
+ end = 0;
/* Check header has valid magic, "ustar" is for the proper tar
* 0's are for the old tar format
*/
if (strncmp(tar.formated.magic, "ustar", 5) != 0) {
-#ifdef CONFIG_FEATURE_TAR_OLD_FORMAT
+#ifdef CONFIG_FEATURE_TAR_OLDGNU_COMPATABILITY
if (strncmp(tar.formated.magic, "\0\0\0\0\0", 5) != 0)
#endif
- error_msg_and_die("Invalid tar magic");
+ bb_error_msg_and_die("Invalid tar magic");
}
-
/* Do checksum on headers */
for (i = 0; i < 148 ; i++) {
sum += tar.raw[i];
sum += tar.raw[i];
}
if (sum != strtol(tar.formated.chksum, NULL, 8)) {
- error_msg("Invalid tar header checksum");
+ bb_error_msg("Invalid tar header checksum");
return(EXIT_FAILURE);
}
- /* convert to type'ed variables */
+#ifdef CONFIG_FEATURE_TAR_GNU_EXTENSIONS
+ if (longname) {
+ file_header->name = longname;
+ longname = NULL;
+ }
+ else if (linkname) {
+ file_header->name = linkname;
+ linkname = NULL;
+ } else
+#endif
if (tar.formated.prefix[0] == 0) {
file_header->name = strdup(tar.formated.name);
} else {
file_header->name = concat_path_file(tar.formated.prefix, tar.formated.name);
}
- file_header->mode = strtol(tar.formated.mode, NULL, 8);
+
file_header->uid = strtol(tar.formated.uid, NULL, 8);
file_header->gid = strtol(tar.formated.gid, NULL, 8);
file_header->size = strtol(tar.formated.size, NULL, 8);
file_header->mtime = strtol(tar.formated.mtime, NULL, 8);
- file_header->link_name = (tar.formated.linkname[0] != '\0') ?
- xstrdup(tar.formated.linkname) : NULL;
- file_header->device = (dev_t) ((strtol(tar.formated.devmajor, NULL, 8) << 8) +
- strtol(tar.formated.devminor, NULL, 8));
+ file_header->link_name = (tar.formated.linkname[0] != '\0') ?
+ bb_xstrdup(tar.formated.linkname) : NULL;
+ file_header->device = makedev(strtol(tar.formated.devmajor, NULL, 8),
+ strtol(tar.formated.devminor, NULL, 8));
-#if defined CONFIG_FEATURE_TAR_OLD_FORMAT || defined CONFIG_FEATURE_GNUTAR_LONG_FILENAME
- /* Fix mode, used by the old format */
+ /* Set bits 0-11 of the files mode */
+ file_header->mode = 07777 & strtol(tar.formated.mode, NULL, 8);
+
+ /* Set bits 12-15 of the files mode */
switch (tar.formated.typeflag) {
-# ifdef CONFIG_FEATURE_TAR_OLD_FORMAT
- case 0:
+ /* busybox identifies hard links as being regular files with 0 size and a link name */
+ case '1':
file_header->mode |= S_IFREG;
break;
- case 1:
- error_msg("Internal hard link not supported");
+ case 'x':
+ case 'g':
+ bb_error_msg_and_die("pax is not tar");
break;
- case 2:
+ case '7':
+ /* Reserved for high performance files, treat as normal file */
+ case 0:
+ case '0':
+#ifdef CONFIG_FEATURE_TAR_OLDGNU_COMPATABILITY
+ if (last_char_is(file_header->name, '/')) {
+ file_header->mode |= S_IFDIR;
+ } else
+#endif
+ file_header->mode |= S_IFREG;
+ break;
+ case '2':
file_header->mode |= S_IFLNK;
break;
- case 3:
+ case '3':
file_header->mode |= S_IFCHR;
break;
- case 4:
+ case '4':
file_header->mode |= S_IFBLK;
break;
- case 5:
+ case '5':
file_header->mode |= S_IFDIR;
break;
- case 6:
+ case '6':
file_header->mode |= S_IFIFO;
break;
-# endif
-# ifdef CONFIG_FEATURE_GNUTAR_LONG_FILENAME
+#ifdef CONFIG_FEATURE_TAR_GNU_EXTENSIONS
case 'L': {
- char *longname;
-
longname = xmalloc(file_header->size + 1);
- xread_all(archive_handle->src_fd, longname, file_header->size);
+ archive_xread_all(archive_handle, longname, file_header->size);
longname[file_header->size] = '\0';
archive_handle->offset += file_header->size;
- get_header_tar(archive_handle);
- file_header->name = longname;
- break;
+ return(get_header_tar(archive_handle));
}
case 'K': {
- char *linkname;
-
linkname = xmalloc(file_header->size + 1);
- xread_all(archive_handle->src_fd, linkname, file_header->size);
+ archive_xread_all(archive_handle, linkname, file_header->size);
linkname[file_header->size] = '\0';
archive_handle->offset += file_header->size;
- get_header_tar(archive_handle);
file_header->name = linkname;
- break;
+ return(get_header_tar(archive_handle));
}
-# endif
- }
+ case 'D': /* GNU dump dir */
+ case 'M': /* Continuation of multi volume archive*/
+ case 'N': /* Old GNU for names > 100 characters */
+ case 'S': /* Sparse file */
+ case 'V': /* Volume header */
+ bb_error_msg("Ignoring GNU extension type %c", tar.formated.typeflag);
#endif
- if (archive_handle->filter(archive_handle->accept, archive_handle->reject, archive_handle->file_header->name) == EXIT_SUCCESS) {
+ default:
+ bb_error_msg("Unknown typeflag: 0x%x", tar.formated.typeflag);
+ }
+ { /* Strip trailing '/' in directories */
+ /* Must be done after mode is set as '/' is used to check if its a directory */
+ char *tmp = last_char_is(file_header->name, '/');
+ if (tmp) {
+ *tmp = '\0';
+ }
+ }
+
+ if (archive_handle->filter(archive_handle) == EXIT_SUCCESS) {
archive_handle->action_header(archive_handle->file_header);
archive_handle->flags |= ARCHIVE_EXTRACT_QUIET;
archive_handle->action_data(archive_handle);
+ archive_handle->passed = llist_add_to(archive_handle->passed, file_header->name);
} else {
- data_skip(archive_handle);
+ data_skip(archive_handle);
}
archive_handle->offset += file_header->size;
+ free(file_header->link_name);
+
return(EXIT_SUCCESS);
}
-
projects / oweals / busybox.git / blobdiff