debugfs/ncheck.c

   1 /*
   2  * ncheck.c --- given a list of inodes, generate a list of names
   3  *
   4  * Copyright (C) 1994 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
  20 #include "debugfs.h"
  21
  22 struct inode_walk_struct {
  23         ext2_ino_t              *iarray;
  24         int                     inodes_left;
  25         int                     num_inodes;
  26         int                     position;
  27         char                    *parent;
  28 };
  29
  30 static int ncheck_proc(struct ext2_dir_entry *dirent,
  31                        int      offset EXT2FS_ATTR((unused)),
  32                        int      blocksize EXT2FS_ATTR((unused)),
  33                        char     *buf EXT2FS_ATTR((unused)),
  34                        void     *private)
  35 {
  36         struct inode_walk_struct *iw = (struct inode_walk_struct *) private;
  37         int     i;
  38
  39         iw->position++;
  40         if (iw->position <= 2)
  41                 return 0;
  42         for (i=0; i < iw->num_inodes; i++) {
  43                 if (iw->iarray[i] == dirent->inode) {
  44                         printf("%u\t%s/%.*s\n", iw->iarray[i], iw->parent,
  45                                (dirent->name_len & 0xFF), dirent->name);
  46                 }
  47         }
  48         if (!iw->inodes_left)
  49                 return DIRENT_ABORT;
  50
  51         return 0;
  52 }
  53
  54 void do_ncheck(int argc, char **argv)
  55 {
  56         struct inode_walk_struct iw;
  57         int                     i;
  58         ext2_inode_scan         scan = 0;
  59         ext2_ino_t              ino;
  60         struct ext2_inode       inode;
  61         errcode_t               retval;
  62         char                    *tmp;
  63
  64         if (argc < 2) {
  65                 com_err(argv[0], 0, "Usage: ncheck <inode number> ...");
  66                 return;
  67         }
  68         if (check_fs_open(argv[0]))
  69                 return;
  70
  71         iw.iarray = malloc(sizeof(ext2_ino_t) * argc);
  72         if (!iw.iarray) {
  73                 com_err("ncheck", ENOMEM,
  74                         "while allocating inode info array");
  75                 return;
  76         }
  77         memset(iw.iarray, 0, sizeof(ext2_ino_t) * argc);
  78
  79         for (i=1; i < argc; i++) {
  80                 iw.iarray[i-1] = strtol(argv[i], &tmp, 0);
  81                 if (*tmp) {
  82                         com_err(argv[0], 0, "Bad inode - %s", argv[i]);
  83                         goto error_out;
  84                 }
  85         }
  86
  87         iw.num_inodes = iw.inodes_left = argc-1;
  88
  89         retval = ext2fs_open_inode_scan(current_fs, 0, &scan);
  90         if (retval) {
  91                 com_err("ncheck", retval, "while opening inode scan");
  92                 goto error_out;
  93         }
  94
  95         do {
  96                 retval = ext2fs_get_next_inode(scan, &ino, &inode);
  97         } while (retval == EXT2_ET_BAD_BLOCK_IN_INODE_TABLE);
  98         if (retval) {
  99                 com_err("ncheck", retval, "while starting inode scan");
 100                 goto error_out;
 101         }
 102
 103         printf("Inode\tPathname\n");
 104         while (ino) {
 105                 if (!inode.i_links_count)
 106                         goto next;
 107                 /*
 108                  * To handle filesystems touched by 0.3c extfs; can be
 109                  * removed later.
 110                  */
 111                 if (inode.i_dtime)
 112                         goto next;
 113                 /* Ignore anything that isn't a directory */
 114                 if (!LINUX_S_ISDIR(inode.i_mode))
 115                         goto next;
 116
 117                 iw.position = 0;
 118
 119                 retval = ext2fs_get_pathname(current_fs, ino, 0, &iw.parent);
 120                 if (retval) {
 121                         com_err("ncheck", retval,
 122                                 "while calling ext2fs_get_pathname");
 123                         goto next;
 124                 }
 125
 126                 retval = ext2fs_dir_iterate(current_fs, ino, 0, 0,
 127                                             ncheck_proc, &iw);
 128                 ext2fs_free_mem(&iw.parent);
 129                 if (retval) {
 130                         com_err("ncheck", retval,
 131                                 "while calling ext2_dir_iterate");
 132                         goto next;
 133                 }
 134
 135                 if (iw.inodes_left == 0)
 136                         break;
 137
 138         next:
 139                 do {
 140                         retval = ext2fs_get_next_inode(scan, &ino, &inode);
 141                 } while (retval == EXT2_ET_BAD_BLOCK_IN_INODE_TABLE);
 142
 143                 if (retval) {
 144                         com_err("ncheck", retval,
 145                                 "while doing inode scan");
 146                         goto error_out;
 147                 }
 148         }
 149
 150 error_out:
 151         free(iw.iarray);
 152         if (scan)
 153                 ext2fs_close_inode_scan(scan);
 154         return;
 155 }
 156
 157
 158