mirror of https://github.com/vitalif/e2fsprogs
363 lines
9.2 KiB
C
363 lines
9.2 KiB
C
/*
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* dumpe2fs.c - List the control structures of a second
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* extended filesystem
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*
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* Copyright (C) 1992, 1993, 1994 Remy Card <card@masi.ibp.fr>
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* Laboratoire MASI, Institut Blaise Pascal
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* Universite Pierre et Marie Curie (Paris VI)
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*
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* Copyright 1995, 1996, 1997 by Theodore Ts'o.
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*
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* %Begin-Header%
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* This file may be redistributed under the terms of the GNU Public
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* License.
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* %End-Header%
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*/
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/*
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* History:
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* 94/01/09 - Creation
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* 94/02/27 - Ported to use the ext2fs library
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*/
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#ifdef HAVE_GETOPT_H
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#include <getopt.h>
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#else
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extern char *optarg;
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extern int optind;
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#endif
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#include <fcntl.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <linux/ext2_fs.h>
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#include "ext2fs/ext2fs.h"
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#include "e2p/e2p.h"
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#include "jfs_user.h"
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#include "../version.h"
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#include "nls-enable.h"
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#define in_use(m, x) (ext2fs_test_bit ((x), (m)))
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const char * program_name = "dumpe2fs";
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char * device_name = NULL;
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int opt_hex = 0;
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static void usage(void)
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{
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fprintf (stderr, _("Usage: %s [-bfhixV] [-ob superblock] "
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"[-oB blocksize] device\n"), program_name);
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exit (1);
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}
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static void print_free (unsigned long group, char * bitmap,
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unsigned long nbytes, unsigned long offset)
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{
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int p = 0;
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unsigned long i;
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unsigned long j;
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for (i = 0; i < nbytes; i++)
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if (!in_use (bitmap, i))
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{
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if (p)
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printf (", ");
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if (i == nbytes - 1 || in_use (bitmap, i + 1))
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printf (opt_hex ? "0x%04x" : "%lu",
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group * nbytes + i + offset);
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else
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{
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for (j = i; j < nbytes && !in_use (bitmap, j);
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j++)
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;
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printf (opt_hex ? "0x%04lx-0x%04lx" :
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"%lu-%lu", group * nbytes + i + offset,
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group * nbytes + (j - 1) + offset);
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i = j - 1;
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}
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p = 1;
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}
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}
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static void list_desc (ext2_filsys fs)
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{
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unsigned long i;
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blk_t group_blk, next_blk;
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char * block_bitmap = fs->block_map->bitmap;
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char * inode_bitmap = fs->inode_map->bitmap;
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int inode_blocks_per_group;
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int group_desc_blocks;
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inode_blocks_per_group = ((fs->super->s_inodes_per_group *
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EXT2_INODE_SIZE(fs->super)) +
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EXT2_BLOCK_SIZE(fs->super) - 1) /
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EXT2_BLOCK_SIZE(fs->super);
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group_desc_blocks = ((fs->super->s_blocks_count -
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fs->super->s_first_data_block +
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EXT2_BLOCKS_PER_GROUP(fs->super) - 1) /
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EXT2_BLOCKS_PER_GROUP(fs->super) +
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EXT2_DESC_PER_BLOCK(fs->super) - 1) /
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EXT2_DESC_PER_BLOCK(fs->super);
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printf ("\n");
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group_blk = fs->super->s_first_data_block;
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for (i = 0; i < fs->group_desc_count; i++) {
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next_blk = group_blk + fs->super->s_blocks_per_group;
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if (next_blk > fs->super->s_blocks_count)
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next_blk = fs->super->s_blocks_count;
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printf (opt_hex ? _("Group %lu: (Blocks 0x%04x -- 0x%04x)\n"):
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_("Group %lu: (Blocks %u -- %u)\n"), i,
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group_blk, next_blk -1 );
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if (ext2fs_bg_has_super (fs, i))
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printf (opt_hex ? _(" %s Superblock at 0x%04x,"
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" Group Descriptors at 0x%04x-0x%04x\n"):
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_(" %s Superblock at %u,"
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" Group Descriptors at %u-%u\n"),
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i == 0 ? _("Primary") : _("Backup"),
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group_blk, group_blk + 1,
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group_blk + group_desc_blocks);
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printf (opt_hex ? _(" Block bitmap at 0x%04x (+%d), "
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"Inode bitmap at 0x%04x (+%d)\n "
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"Inode table at 0x%04x-0x%04x (+%d)\n"):
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_(" Block bitmap at %u (+%d), "
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"Inode bitmap at %u (+%d)\n "
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"Inode table at %u-%u (+%d)\n"),
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fs->group_desc[i].bg_block_bitmap,
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fs->group_desc[i].bg_block_bitmap - group_blk,
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fs->group_desc[i].bg_inode_bitmap,
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fs->group_desc[i].bg_inode_bitmap - group_blk,
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fs->group_desc[i].bg_inode_table,
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fs->group_desc[i].bg_inode_table +
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inode_blocks_per_group - 1,
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fs->group_desc[i].bg_inode_table - group_blk);
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printf (_(" %d free blocks, %d free inodes, %d directories\n"),
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fs->group_desc[i].bg_free_blocks_count,
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fs->group_desc[i].bg_free_inodes_count,
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fs->group_desc[i].bg_used_dirs_count);
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printf (_(" Free blocks: "));
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print_free (i, block_bitmap, fs->super->s_blocks_per_group,
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fs->super->s_first_data_block);
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block_bitmap += fs->super->s_blocks_per_group / 8;
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printf ("\n");
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printf (_(" Free inodes: "));
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print_free (i, inode_bitmap, fs->super->s_inodes_per_group, 1);
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inode_bitmap += fs->super->s_inodes_per_group / 8;
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printf ("\n");
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group_blk = next_blk;
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}
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}
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static void list_bad_blocks(ext2_filsys fs)
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{
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badblocks_list bb_list = 0;
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badblocks_iterate bb_iter;
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blk_t blk;
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errcode_t retval;
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retval = ext2fs_read_bb_inode(fs, &bb_list);
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if (retval) {
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com_err("ext2fs_read_bb_inode", retval, "");
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exit(1);
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}
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retval = badblocks_list_iterate_begin(bb_list, &bb_iter);
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if (retval) {
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com_err("badblocks_list_iterate_begin", retval,
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_("while printing bad block list"));
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exit(1);
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}
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if (badblocks_list_iterate(bb_iter, &blk))
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printf(_("Bad blocks: %d"), blk);
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while (badblocks_list_iterate(bb_iter, &blk))
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printf(", %d", blk);
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badblocks_list_iterate_end(bb_iter);
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printf("\n");
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}
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static void dump_bad_blocks(ext2_filsys fs)
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{
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badblocks_list bb_list = 0;
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badblocks_iterate bb_iter;
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blk_t blk;
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errcode_t retval;
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retval = ext2fs_read_bb_inode(fs, &bb_list);
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if (retval) {
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com_err("ext2fs_read_bb_inode", retval, "");
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exit(1);
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}
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retval = badblocks_list_iterate_begin(bb_list, &bb_iter);
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if (retval) {
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com_err("badblocks_list_iterate_begin", retval,
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_("while printing bad block list"));
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exit(1);
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}
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while (badblocks_list_iterate(bb_iter, &blk))
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printf("%d\n", blk);
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badblocks_list_iterate_end(bb_iter);
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}
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static int i386_byteorder(void)
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{
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int one = 1;
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char *cp = (char *) &one;
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return (*cp == 1);
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}
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static void print_journal_information(ext2_filsys fs)
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{
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errcode_t retval;
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char buf[1024];
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char str[80];
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int i;
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journal_superblock_t *jsb;
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/* Get the journal superblock */
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if ((retval = io_channel_read_blk(fs->io, fs->super->s_first_data_block+1, -1024, buf))) {
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com_err(program_name, retval,
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_("while reading journal superblock"));
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exit(1);
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}
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jsb = (journal_superblock_t *) buf;
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if ((jsb->s_header.h_magic != (unsigned) ntohl(JFS_MAGIC_NUMBER)) ||
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(jsb->s_header.h_blocktype !=
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(unsigned) ntohl(JFS_SUPERBLOCK_V2))) {
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com_err(program_name, 0,
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_("Couldn't find journal superblock magic numbers"));
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exit(1);
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}
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fputs("\n", stdout);
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printf("Journal block size: %d\n", ntohl(jsb->s_blocksize));
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printf("Journal length: %d\n", ntohl(jsb->s_maxlen));
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printf("Journal first block: %d\n", ntohl(jsb->s_first));
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printf("Journal sequence: 0x%08x\n", ntohl(jsb->s_sequence));
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printf("Journal start: %d\n", ntohl(jsb->s_start));
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printf("Journal number of users: %d\n", ntohl(jsb->s_nr_users));
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for (i=0; i < ntohl(jsb->s_nr_users); i++) {
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if (i)
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printf(" ");
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else
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printf("Journal users: ");
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uuid_unparse(&jsb->s_users[i*16], str);
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printf("%s\n", str);
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}
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}
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int main (int argc, char ** argv)
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{
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errcode_t retval;
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ext2_filsys fs;
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int print_badblocks = 0;
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int use_superblock = 0;
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int use_blocksize = 0;
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int image_dump = 0;
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int force = 0;
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int flags;
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int header_only = 0;
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int big_endian;
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int c;
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#ifdef ENABLE_NLS
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setlocale(LC_MESSAGES, "");
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bindtextdomain(NLS_CAT_NAME, LOCALEDIR);
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textdomain(NLS_CAT_NAME);
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#endif
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initialize_ext2_error_table();
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fprintf (stderr, _("dumpe2fs %s, %s for EXT2 FS %s, %s\n"),
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E2FSPROGS_VERSION, E2FSPROGS_DATE,
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EXT2FS_VERSION, EXT2FS_DATE);
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if (argc && *argv)
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program_name = *argv;
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while ((c = getopt (argc, argv, "bfhixVo:")) != EOF) {
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switch (c) {
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case 'b':
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print_badblocks++;
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break;
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case 'f':
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force++;
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break;
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case 'h':
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header_only++;
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break;
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case 'i':
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image_dump++;
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break;
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case 'o':
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if (optarg[0] == 'b')
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use_superblock = atoi(optarg+1);
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else if (optarg[0] == 'B')
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use_blocksize = atoi(optarg+1);
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else
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usage();
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break;
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case 'V':
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/* Print version number and exit */
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fprintf(stderr, _("\tUsing %s\n"),
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error_message(EXT2_ET_BASE));
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exit(0);
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case 'x':
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opt_hex=1;
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break;
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default:
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usage();
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}
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}
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if (optind > argc - 1)
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usage();
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device_name = argv[optind++];
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if (use_superblock && !use_blocksize)
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use_blocksize = 1024;
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flags = EXT2_FLAG_JOURNAL_DEV_OK;
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if (force)
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flags |= EXT2_FLAG_FORCE;
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if (image_dump)
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flags |= EXT2_FLAG_IMAGE_FILE;
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retval = ext2fs_open (device_name, flags, use_superblock,
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use_blocksize, unix_io_manager, &fs);
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if (retval) {
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com_err (program_name, retval, _("while trying to open %s"),
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device_name);
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printf (_("Couldn't find valid filesystem superblock.\n"));
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exit (1);
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}
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if (print_badblocks) {
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dump_bad_blocks(fs);
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} else {
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big_endian = ((fs->flags & EXT2_FLAG_SWAP_BYTES) != 0);
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if (!i386_byteorder())
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big_endian = !big_endian;
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if (big_endian)
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printf(_("Note: This is a byte-swapped filesystem\n"));
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list_super (fs->super);
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if (fs->super->s_feature_incompat &
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EXT3_FEATURE_INCOMPAT_JOURNAL_DEV) {
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print_journal_information(fs);
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ext2fs_close(fs);
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exit(0);
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}
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list_bad_blocks (fs);
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if (header_only) {
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ext2fs_close (fs);
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exit (0);
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}
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retval = ext2fs_read_bitmaps (fs);
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if (retval) {
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com_err (program_name, retval,
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_("while trying to read the bitmaps"),
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device_name);
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ext2fs_close (fs);
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exit (1);
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}
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list_desc (fs);
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}
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ext2fs_close (fs);
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exit (0);
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}
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