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