diff options
Diffstat (limited to 'debugfs/lsdel.c')
| -rw-r--r-- | debugfs/lsdel.c | 186 |
1 files changed, 186 insertions, 0 deletions
diff --git a/debugfs/lsdel.c b/debugfs/lsdel.c new file mode 100644 index 00000000..3da9a9ef --- /dev/null +++ b/debugfs/lsdel.c @@ -0,0 +1,186 @@ +/* + * undelete.c --- routines to try to help a user recover a deleted file. + * + * Copyright (C) 1994 Theodore Ts'o. This file may be redistributed + * under the terms of the GNU Public License. + */ + +#include <stdio.h> +#include <unistd.h> +#include <stdlib.h> +#include <ctype.h> +#include <string.h> +#include <time.h> +#include <getopt.h> +#include <sys/types.h> +#include <sys/stat.h> + +#include "debugfs.h" + +struct deleted_info { + ino_t ino; + unsigned short mode; + unsigned short uid; + unsigned long size; + time_t dtime; + int num_blocks; + int free_blocks; +}; + +struct lsdel_struct { + ino_t inode; + int num_blocks; + int free_blocks; + int bad_blocks; +}; + +int deleted_info_compare(const void *a, const void *b) +{ + struct deleted_info *arg1, *arg2; + + arg1 = (struct deleted_info *) a; + arg2 = (struct deleted_info *) b; + + return arg1->dtime - arg2->dtime; +} + +int lsdel_proc(ext2_filsys fs, + blk_t *block_nr, + int blockcnt, + void *private) +{ + struct lsdel_struct *lsd = (struct lsdel_struct *) private; + + lsd->num_blocks++; + + if (*block_nr < fs->super->s_first_data_block || + *block_nr >= fs->super->s_blocks_count) { + lsd->bad_blocks++; + return BLOCK_ABORT; + } + + if (!ext2fs_test_block_bitmap(fs->block_map,*block_nr)) + lsd->free_blocks++; + + return 0; +} + +void do_lsdel(int argc, char **argv) +{ + struct lsdel_struct lsd; + struct deleted_info *delarray; + int num_delarray, max_delarray; + ext2_inode_scan scan = 0; + ino_t ino; + struct ext2_inode inode; + errcode_t retval; + char *block_buf; + int i; + + if (argc > 1) { + com_err(argv[0], 0, "Usage: ls_deleted_inodes\n"); + return; + } + if (check_fs_open(argv[0])) + return; + + max_delarray = 100; + num_delarray = 0; + delarray = malloc(max_delarray * sizeof(struct deleted_info)); + if (!delarray) { + com_err("ls_deleted_inodes", ENOMEM, + "while allocating deleted information storage"); + exit(1); + } + + block_buf = malloc(fs->blocksize * 3); + if (!block_buf) { + com_err("ls_deleted_inodes", ENOMEM, "while allocating block buffer"); + goto error_out; + } + + retval = ext2fs_open_inode_scan(fs, 0, &scan); + if (retval) { + com_err("ls_deleted_inodes", retval, + "while opening inode scan"); + goto error_out; + } + + retval = ext2fs_get_next_inode(scan, &ino, &inode); + if (retval) { + com_err("ls_deleted_inodes", retval, + "while starting inode scan"); + goto error_out; + } + + while (ino) { + if (inode.i_dtime == 0) + goto next; + + lsd.inode = ino; + lsd.num_blocks = 0; + lsd.free_blocks = 0; + lsd.bad_blocks = 0; + + retval = ext2fs_block_iterate(fs, ino, 0, block_buf, + lsdel_proc, &lsd); + if (retval) { + com_err("ls_deleted_inodes", retval, + "while calling ext2_block_iterate"); + goto next; + } + if (lsd.free_blocks && !lsd.bad_blocks) { + if (num_delarray >= max_delarray) { + max_delarray += 50; + delarray = realloc(delarray, + max_delarray * sizeof(struct deleted_info)); + if (!delarray) { + com_err("ls_deleted_inodes", + ENOMEM, + "while reallocating array"); + exit(1); + } + } + + delarray[num_delarray].ino = ino; + delarray[num_delarray].mode = inode.i_mode; + delarray[num_delarray].uid = inode.i_uid; + delarray[num_delarray].size = inode.i_size; + delarray[num_delarray].dtime = inode.i_dtime; + delarray[num_delarray].num_blocks = lsd.num_blocks; + delarray[num_delarray].free_blocks = lsd.free_blocks; + num_delarray++; + } + + next: + retval = ext2fs_get_next_inode(scan, &ino, &inode); + if (retval) { + com_err("ls_deleted_inodes", retval, + "while doing inode scan"); + goto error_out; + } + } + + printf("%d deleted inodes found.\n", num_delarray); + printf(" Inode Owner Mode Size Blocks Time deleted\n"); + + qsort(delarray, num_delarray, sizeof(struct deleted_info), + deleted_info_compare); + + for (i = 0; i < num_delarray; i++) { + printf("%6lu %6d %6o %6lu %4d/%4d %s", delarray[i].ino, + delarray[i].uid, delarray[i].mode, delarray[i].size, + delarray[i].free_blocks, delarray[i].num_blocks, + ctime(&delarray[i].dtime)); + } + +error_out: + free(block_buf); + free(delarray); + if (scan) + ext2fs_close_inode_scan(scan); + return; +} + + + |