mirror of
https://git.kernel.org/pub/scm/fs/ext2/e2fsprogs.git
synced 2024-11-30 21:43:40 +08:00
58 lines
1.3 KiB
C
58 lines
1.3 KiB
C
/*
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* unused.c --- quick and dirty unused space dumper
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*
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* Copyright (C) 1997 Theodore Ts'o. This file may be redistributed
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* under the terms of the GNU Public License.
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*/
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#include <stdio.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <ctype.h>
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#include <string.h>
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#include <time.h>
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#ifdef HAVE_ERRNO_H
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#include <errno.h>
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#endif
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#include <sys/types.h>
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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 int optind;
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extern char *optarg;
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#endif
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#include "debugfs.h"
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void do_dump_unused(int argc EXT2FS_ATTR((unused)), char **argv)
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{
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unsigned long blk;
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unsigned char buf[EXT2_MAX_BLOCK_SIZE];
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unsigned int i;
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errcode_t retval;
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if (common_args_process(argc, argv, 1, 1,
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"dump_unused", "", 0))
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return;
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for (blk=current_fs->super->s_first_data_block;
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blk < current_fs->super->s_blocks_count; blk++) {
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if (ext2fs_test_block_bitmap(current_fs->block_map,blk))
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continue;
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retval = io_channel_read_blk(current_fs->io, blk, 1, buf);
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if (retval) {
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com_err(argv[0], retval, "While reading block\n");
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return;
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}
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for (i=0; i < current_fs->blocksize; i++)
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if (buf[i])
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break;
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if (i >= current_fs->blocksize)
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continue;
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printf("\nUnused block %lu contains non-zero data:\n\n",
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blk);
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for (i=0; i < current_fs->blocksize; i++)
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fputc(buf[i], stdout);
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}
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}
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