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Change "filesystem" to "file system" in the man pages
[tools/e2fsprogs.git] / debugfs / unused.c
1 /*
2  * unused.c --- quick and dirty unused space dumper
3  *
4  * Copyright (C) 1997 Theodore Ts'o.  This file may be redistributed
5  * under the terms of the GNU Public License.
6  */
7
8 #include "config.h"
9 #include <stdio.h>
10 #include <unistd.h>
11 #include <stdlib.h>
12 #include <ctype.h>
13 #include <string.h>
14 #include <time.h>
15 #ifdef HAVE_ERRNO_H
16 #include <errno.h>
17 #endif
18 #include <sys/types.h>
19 #ifdef HAVE_GETOPT_H
20 #include <getopt.h>
21 #else
22 extern int optind;
23 extern char *optarg;
24 #endif
25
26 #include "debugfs.h"
27
28 void do_dump_unused(int argc EXT2FS_ATTR((unused)), char **argv,
29                     int sci_idx EXT2FS_ATTR((unused)),
30                     void *infop EXT2FS_ATTR((unused)))
31 {
32         blk64_t         blk;
33         unsigned char   buf[EXT2_MAX_BLOCK_SIZE];
34         unsigned int    i;
35         errcode_t       retval;
36
37         if (common_args_process(argc, argv, 1, 1,
38                                 "dump_unused", "", 0))
39                 return;
40
41         for (blk=current_fs->super->s_first_data_block;
42              blk < ext2fs_blocks_count(current_fs->super); blk++) {
43                 if (ext2fs_test_block_bitmap2(current_fs->block_map,blk))
44                         continue;
45                 retval = io_channel_read_blk64(current_fs->io, blk, 1, buf);
46                 if (retval) {
47                         com_err(argv[0], retval, "While reading block\n");
48                         return;
49                 }
50                 for (i=0; i < current_fs->blocksize; i++)
51                         if (buf[i])
52                                 break;
53                 if (i >= current_fs->blocksize)
54                         continue;
55                 printf("\nUnused block %llu contains non-zero data:\n\n",
56                        (unsigned long long) blk);
57                 for (i=0; i < current_fs->blocksize; i++)
58                         fputc(buf[i], stdout);
59         }
60 }