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 <stdio.h>
   9 #include <unistd.h>
  10 #include <stdlib.h>
  11 #include <ctype.h>
  12 #include <string.h>
  13 #include <time.h>
  14 #ifdef HAVE_ERRNO_H
  15 #include <errno.h>
  16 #endif
  17 #include <sys/types.h>
  18
  19 #include "debugfs.h"
  20
  21 struct inode_walk_struct {
  22         ext2_ino_t              *iarray;
  23         int                     inodes_left;
  24         int                     num_inodes;
  25         int                     position;
  26         char                    *parent;
  27 };
  28
  29 static int ncheck_proc(struct ext2_dir_entry *dirent,
  30                        int      offset EXT2FS_ATTR((unused)),
  31                        int      blocksize EXT2FS_ATTR((unused)),
  32                        char     *buf EXT2FS_ATTR((unused)),
  33                        void     *private)
  34 {
  35         struct inode_walk_struct *iw = (struct inode_walk_struct *) private;
  36         int     i;
  37         char    *pathname;
  38         errcode_t       retval;
  39
  40         iw->position++;
  41         if (iw->position <= 2)
  42                 return 0;
  43         for (i=0; i < iw->num_inodes; i++) {
  44                 if (iw->iarray[i] == dirent->inode) {
  45                         printf("%u\t%s/%*s\n", iw->iarray[i], iw->parent,
  46                                (dirent->name_len & 0xFF), dirent->name);
  47                 }
  48         }
  49         if (!iw->inodes_left)
  50                 return DIRENT_ABORT;
  51
  52         return 0;
  53 }
  54
  55 void do_ncheck(int argc, char **argv)
  56 {
  57         struct inode_walk_struct iw;
  58         int                     i;
  59         ext2_inode_scan         scan = 0;
  60         ext2_ino_t              ino;
  61         struct ext2_inode       inode;
  62         errcode_t               retval;
  63         char                    *tmp;
  64
  65         if (argc < 2) {
  66                 com_err(argv[0], 0, "Usage: ncheck <inode number> ...");
  67                 return;
  68         }
  69         if (check_fs_open(argv[0]))
  70                 return;
  71
  72         iw.iarray = malloc(sizeof(ext2_ino_t) * argc);
  73         if (!iw.iarray) {
  74                 com_err("ncheck", ENOMEM,
  75                         "while allocating inode info array");
  76                 return;
  77         }
  78         memset(iw.iarray, 0, sizeof(ext2_ino_t) * argc);
  79
  80         for (i=1; i < argc; i++) {
  81                 iw.iarray[i-1] = strtol(argv[i], &tmp, 0);
  82                 if (*tmp) {
  83                         com_err(argv[0], 0, "Bad inode - %s", argv[i]);
  84                         goto error_out;
  85                 }
  86         }
  87
  88         iw.num_inodes = iw.inodes_left = argc-1;
  89
  90         retval = ext2fs_open_inode_scan(current_fs, 0, &scan);
  91         if (retval) {
  92                 com_err("ncheck", retval, "while opening inode scan");
  93                 goto error_out;
  94         }
  95
  96         do {
  97                 retval = ext2fs_get_next_inode(scan, &ino, &inode);
  98         } while (retval == EXT2_ET_BAD_BLOCK_IN_INODE_TABLE);
  99         if (retval) {
 100                 com_err("ncheck", retval, "while starting inode scan");
 101                 goto error_out;
 102         }
 103
 104         printf("Inode\tPathname\n");
 105         while (ino) {
 106                 if (!inode.i_links_count)
 107                         goto next;
 108                 /*
 109                  * To handle filesystems touched by 0.3c extfs; can be
 110                  * removed later.
 111                  */
 112                 if (inode.i_dtime)
 113                         goto next;
 114                 /* Ignore anything that isn't a directory */
 115                 if (!LINUX_S_ISDIR(inode.i_mode))
 116                         goto next;
 117
 118                 iw.position = 0;
 119
 120                 retval = ext2fs_get_pathname(current_fs, ino, 0, &iw.parent);
 121                 if (retval) {
 122                         com_err("ncheck", retval,
 123                                 "while calling ext2fs_get_pathname");
 124                         goto next;
 125                 }
 126
 127                 retval = ext2fs_dir_iterate(current_fs, ino, 0, 0,
 128                                             ncheck_proc, &iw);
 129                 ext2fs_free_mem(&iw.parent);
 130                 if (retval) {
 131                         com_err("ncheck", retval,
 132                                 "while calling ext2_dir_iterate");
 133                         goto next;
 134                 }
 135
 136                 if (iw.inodes_left == 0)
 137                         break;
 138
 139         next:
 140                 do {
 141                         retval = ext2fs_get_next_inode(scan, &ino, &inode);
 142                 } while (retval == EXT2_ET_BAD_BLOCK_IN_INODE_TABLE);
 143
 144                 if (retval) {
 145                         com_err("ncheck", retval,
 146                                 "while doing inode scan");
 147                         goto error_out;
 148                 }
 149         }
 150
 151 error_out:
 152         free(iw.iarray);
 153         if (scan)
 154                 ext2fs_close_inode_scan(scan);
 155         return;
 156 }
 157
 158
 159