* using gpart program.
*
* Portions Copyright 1998-2000, Theodore Ts'o.
- *
- * This program may be used under the provisions of the GNU Public
- * License, *EXCEPT* that a binary copy of the executable may not be
- * packaged as a part of binary package which is distributed as part
- * of a Linux distribution. (Yes, this violates the Debian Free
- * Software Guidelines in terms of restricting its field of use.
- * That's the point. I don't want this program being distributed in
- * Debian, because I don't care to support it, and the maintainer,
- * Yann Dirson, doesn't seem to pay attention to my wishes on this
- * matter. So I'm delibiately adding this clause so it violates the
- * Debian Free Software Guidelines to force him to take it out. If
- * this doesn't work, I'll have to remove it from the upstream source
- * distribution at the next release. End of Rant. :-)
- *
*
* Well, here's my linux version of findsuper.
* I'm sure you coulda done it faster. :)
*
* I wanted to add msdos support, but I couldn't make heads or tails
* of the kernel include files to find anything I could look for in msdos.
- *
+ *
* Reading every block of a Sun partition is fairly quick. Doing the
* same under linux (slower hardware I suppose) just isn't the same.
* It might be more useful to default to reading the first (second?) block
* findsuper /dev/hda
* findsuper /dev/hda 437760 1024 (my disk has cyls of 855*512)
*
- * I suppose the next step is to figgure out a way to determine if
+ * I suppose the next step is to figure out a way to determine if
* the block found is the first superblock somehow, and if so, build
* a partition table from the superblocks found... but this is still
* useful as is.
* Note that gpart does not appear to find all superblocks that aren't aligned
* with the start of a possible partition, so it is not useful in systems
* with LVM or similar setups which don't use fat partition alignment.
+ *
+ * %Begin-Header%
+ * This file may be redistributed under the terms of the GNU Public
+ * License.
+ * %End-Header%
*/
/*
* Documentation addendum added by Andreas dwguest@win.tue.nl/aeb@cwi.nl
- *
+ *
* The program findsuper is a utility that scans a disk and finds
- * copies of ext2 superblocks (by checking for the ext2 signature
- *
+ * copies of ext2 superblocks (by checking for the ext2 signature).
+ *
* For each superblock found, it prints the offset in bytes, the
- * offset in 1024-byte blocks, the size of ext2 partition in fs
+ * offset in 1024-byte blocks, the size of the ext2 partition in fs
* blocks, the filesystem blocksize (in bytes), the block group number
* (always 0 for older ext2 systems), and a timestamp (s_mtime).
- *
+ *
* This program can be used to retrieve partitions that have been
* lost. The superblock for block group 0 is found 1 block (2
* sectors) after the partition start.
- *
+ *
* For new systems that have a block group number in the superblock it
* is immediately clear which superblock is the first of a partition.
* For old systems where no group numbers are given, the first
- * superblock can be recognised by the timestamp: all superblock
+ * superblock can be recognized by the timestamp: all superblock
* copies have the creation time in s_mtime, except the first, which
* has the last time e2fsck or tune2fs wrote to the filesystem.
- *
+ *
*/
#define _FILE_OFFSET_BITS 64
+#include "config.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include "ext2fs/ext2_fs.h"
-#include "nls-enable.h"
+#include "ext2fs/ext2fs.h"
+#include "support/nls-enable.h"
#undef DEBUG
#define WHY(fmt, arg...) { continue; }
#endif
+static void usage(void)
+{
+ fprintf(stderr,
+ _("Usage: findsuper device [skipbytes [startkb]]\n"));
+ exit(1);
+}
+
+
int main(int argc, char *argv[])
{
int skiprate=512; /* one sector */
char *s;
time_t tm, last = time(0);
loff_t interval = 1024 * 1024;
-
+ int c, print_jnl_copies = 0;
+ const char * device_name;
struct ext2_super_block ext2;
/* interesting fields: EXT2_SUPER_MAGIC
* s_blocks_count s_log_block_size s_mtime s_magic s_lastcheck */
#ifdef ENABLE_NLS
setlocale(LC_MESSAGES, "");
+ setlocale(LC_CTYPE, "");
bindtextdomain(NLS_CAT_NAME, LOCALEDIR);
textdomain(NLS_CAT_NAME);
+ set_com_err_gettext(gettext);
#endif
- if (argc<2) {
- fprintf(stderr,
- _("Usage: findsuper device [skipbytes [startkb]]\n"));
- exit(1);
+
+ while ((c = getopt (argc, argv, "j")) != EOF) {
+ switch (c) {
+ case 'j':
+ print_jnl_copies++;
+ break;
+ default:
+ usage();
+ }
}
- if (argc>2)
- skiprate = strtol(argv[2], &s, 0);
- if (s == argv[2]) {
- fprintf(stderr,_("skiprate should be a number, not %s\n"), s);
- exit(1);
+
+ if (optind == argc)
+ usage();
+
+ device_name = argv[optind++];
+
+ if (optind < argc) {
+ skiprate = strtol(argv[optind], &s, 0);
+ if (s == argv[optind]) {
+ fprintf(stderr,_("skipbytes should be a number, not %s\n"), s);
+ exit(1);
+ }
+ optind++;
}
if (skiprate & 0x1ff) {
fprintf(stderr,
_("skipbytes must be a multiple of the sector size\n"));
exit(2);
}
- if (argc>3)
- sk = skl = strtoll(argv[3], &s, 0) << 10;
- if (s == argv[3]) {
- fprintf(stderr,_("startkb should be a number, not %s\n"), s);
- exit(1);
+ if (optind < argc) {
+ sk = skl = strtoll(argv[optind], &s, 0) << 10;
+ if (s == argv[optind]) {
+ fprintf(stderr,
+ _("startkb should be a number, not %s\n"), s);
+ exit(1);
+ }
+ optind++;
}
if (sk < 0) {
- fprintf(stderr,_("startkb should be positive, not %Ld\n"), sk);
+ fprintf(stderr, _("startkb should be positive, not %llu\n"),sk);
exit(1);
}
- fd = open(argv[1], O_RDONLY);
+
+ fd = open(device_name, O_RDONLY);
if (fd < 0) {
- perror(argv[1]);
+ perror(device_name);
exit(1);
}
-
- /* Now, go looking for the superblock ! */
- printf(_("starting at %Ld, with %d byte increments\n"), sk, skiprate);
- printf(_(" thisoff block fs_blk_sz blksz grp last_mount\n"));
+
+ /* Now, go looking for the superblock! */
+ printf(_("starting at %llu, with %u byte increments\n"), sk, skiprate);
+ if (print_jnl_copies)
+ printf(_("[*] probably superblock written in the ext3 "
+ "journal superblock,\n\tso start/end/grp wrong\n"));
+ printf(_("byte_offset byte_start byte_end fs_blocks blksz grp mkfs/mount_time sb_uuid label\n"));
for (; lseek64(fd, sk, SEEK_SET) != -1 &&
read(fd, &ext2, 512) == 512; sk += skiprate) {
+ static unsigned char last_uuid[16] = "blah";
+ unsigned long long bsize, grpsize;
+ int jnl_copy, sb_offset;
if (sk && !(sk & (interval - 1))) {
time_t now, diff;
if (diff > 0) {
s = ctime(&now);
s[24] = 0;
- printf("\r%14Ld: %8LdkB/s @ %s", sk,
+ printf("\r%11Lu: %8LukB/s @ %s", sk,
(((sk - skl)) / diff) >> 10, s);
fflush(stdout);
}
}
if (ext2.s_magic != EXT2_SUPER_MAGIC)
continue;
- if (ext2.s_log_block_size > 4)
- WHY("log block size > 4 (%d)\n", ext2.s_log_block_size);
- if (ext2.s_r_blocks_count > ext2.s_blocks_count)
- WHY("r_blocks_count > blocks_count (%d > %d)\n",
- ext2.s_r_blocks_count, ext2.s_blocks_count);
- if (ext2.s_free_blocks_count > ext2.s_blocks_count)
- WHY("free_blocks_count > blocks_count\n (%d > %d)\n",
- ext2.s_free_blocks_count, ext2.s_blocks_count);
+ if (ext2.s_log_block_size > 6)
+ WHY("log block size > 6 (%u)\n", ext2.s_log_block_size);
+ if (ext2fs_r_blocks_count(&ext2) > ext2fs_blocks_count(&ext2))
+ WHY("r_blocks_count > blocks_count (%u > %u)\n",
+ ext2fs_r_blocks_count(&ext2),
+ ext2fs_blocks_count(&ext2));
+ if (ext2fs_free_blocks_count(&ext2) > ext2fs_blocks_count(&ext2))
+ WHY("free_blocks_count > blocks_count\n (%u > %u)\n",
+ ext2fs_free_blocks_count(&ext2),
+ ext2fs_blocks_count(&ext2));
if (ext2.s_free_inodes_count > ext2.s_inodes_count)
- WHY("free_inodes_count > inodes_count (%d > %d)\n",
+ WHY("free_inodes_count > inodes_count (%u > %u)\n",
ext2.s_free_inodes_count, ext2.s_inodes_count);
- tm = ext2.s_mtime;
- s=ctime(&tm);
- s[24]=0;
- printf("\r%14Ld %9Ld %9d %5d %4d %s\n",
- sk, sk >> 10, ext2.s_blocks_count,
- 1 << (ext2.s_log_block_size + 10),
- ext2.s_block_group_nr, s);
+ if (ext2.s_mkfs_time != 0)
+ tm = ext2.s_mkfs_time;
+ else
+ tm = ext2.s_mtime;
+ s = ctime(&tm);
+ s[24] = 0;
+ bsize = 1 << (ext2.s_log_block_size + 10);
+ grpsize = bsize * ext2.s_blocks_per_group;
+ if (memcmp(ext2.s_uuid, last_uuid, sizeof(last_uuid)) == 0 &&
+ ext2.s_rev_level > 0 && ext2.s_block_group_nr == 0) {
+ jnl_copy = 1;
+ } else {
+ jnl_copy = 0;
+ memcpy(last_uuid, ext2.s_uuid, sizeof(last_uuid));
+ }
+ if (ext2.s_block_group_nr == 0 || bsize == 1024)
+ sb_offset = 1024;
+ else
+ sb_offset = 0;
+ if (jnl_copy && !print_jnl_copies)
+ continue;
+ printf("\r%11Lu %11Lu%s %11Lu%s %9u %5Lu %4u%s %s %02x%02x%02x%02x %.*s\n",
+ sk, sk - ext2.s_block_group_nr * grpsize - sb_offset,
+ jnl_copy ? "*":" ",
+ sk + ext2fs_blocks_count(&ext2) * bsize -
+ ext2.s_block_group_nr * grpsize - sb_offset,
+ jnl_copy ? "*" : " ", ext2fs_blocks_count(&ext2), bsize,
+ ext2.s_block_group_nr, jnl_copy ? "*" : " ", s,
+ ext2.s_uuid[0], ext2.s_uuid[1],
+ ext2.s_uuid[2], ext2.s_uuid[3],
+ EXT2_LEN_STR(ext2.s_volume_name));
}
- printf(_("\n%14Ld: finished with errno %d\n"), sk, errno);
+ printf(_("\n%11Lu: finished with errno %d\n"), sk, errno);
close(fd);
return errno;
git://git.whamcloud.com / tools / e2fsprogs.git / blobdiff