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 #ifdef HAVE_GETOPT_H
  20 #include <getopt.h>
  21 #else
  22 extern int optind;
  23 extern char *optarg;
  24 #endif
  25
  26 #include "debugfs.h"
  27
  28 struct inode_walk_struct {
  29         ext2_ino_t              dir;
  30         ext2_ino_t              *iarray;
  31         int                     inodes_left;
  32         int                     num_inodes;
  33         int                     position;
  34         char                    *parent;
  35         unsigned int            get_pathname_failed:1;
  36         unsigned int            check_dirent:1;
  37 };
  38
  39 static int ncheck_proc(struct ext2_dir_entry *dirent,
  40                        int      offset EXT2FS_ATTR((unused)),
  41                        int      blocksize EXT2FS_ATTR((unused)),
  42                        char     *buf EXT2FS_ATTR((unused)),
  43                        void     *private)
  44 {
  45         struct inode_walk_struct *iw = (struct inode_walk_struct *) private;
  46         struct ext2_inode inode;
  47         errcode_t       retval;
  48         int             filetype = dirent->name_len >> 8;
  49         int             i;
  50
  51         iw->position++;
  52         if (iw->position <= 2)
  53                 return 0;
  54         for (i=0; i < iw->num_inodes; i++) {
  55                 if (iw->iarray[i] == dirent->inode) {
  56                         if (!iw->parent && !iw->get_pathname_failed) {
  57                                 retval = ext2fs_get_pathname(current_fs,
  58                                                              iw->dir,
  59                                                              0, &iw->parent);
  60                                 if (retval) {
  61                                         com_err("ncheck", retval,
  62                 "while calling ext2fs_get_pathname for inode #%u", iw->dir);
  63                                         iw->get_pathname_failed = 1;
  64                                 }
  65                         }
  66                         if (iw->parent)
  67                                 printf("%u\t%s/%.*s", iw->iarray[i],
  68                                        iw->parent,
  69                                        (dirent->name_len & 0xFF), dirent->name);
  70                         else
  71                                 printf("%u\t<%u>/%.*s", iw->iarray[i],
  72                                        iw->dir,
  73                                        (dirent->name_len & 0xFF), dirent->name);
  74                         if (iw->check_dirent && filetype) {
  75                                 if (!debugfs_read_inode(dirent->inode, &inode,
  76                                                         "ncheck") &&
  77                                     filetype != ext2_file_type(inode.i_mode)) {
  78                                         printf("  <--- BAD FILETYPE");
  79                                 }
  80                         }
  81                         putc('\n', stdout);
  82                 }
  83         }
  84         if (!iw->inodes_left)
  85                 return DIRENT_ABORT;
  86
  87         return 0;
  88 }
  89
  90 void do_ncheck(int argc, char **argv)
  91 {
  92         struct inode_walk_struct iw;
  93         int                     c, i;
  94         ext2_inode_scan         scan = 0;
  95         ext2_ino_t              ino;
  96         struct ext2_inode       *inode = NULL;
  97         int                     inode_size;
  98         errcode_t               retval;
  99         char                    *tmp;
 100
 101         iw.check_dirent = 0;
 102
 103         reset_getopt();
 104         while ((c = getopt (argc, argv, "c")) != EOF) {
 105                 switch (c) {
 106                 case 'c':
 107                         iw.check_dirent = 1;
 108                         break;
 109                 default:
 110                         goto print_usage;
 111                 }
 112         }
 113         argc -= optind;
 114         argv += optind;
 115
 116         if (argc < 1) {
 117         print_usage:
 118                 com_err(argv[0], 0, "Usage: ncheck [-c] <inode number> ...");
 119                 return;
 120         }
 121         if (check_fs_open(argv[0]))
 122                 return;
 123
 124         iw.iarray = malloc(sizeof(ext2_ino_t) * argc);
 125         if (!iw.iarray) {
 126                 com_err("ncheck", ENOMEM,
 127                         "while allocating inode number array");
 128                 return;
 129         }
 130         memset(iw.iarray, 0, sizeof(ext2_ino_t) * argc);
 131
 132         for (i=0; i < argc; i++) {
 133                 iw.iarray[i] = strtol(argv[i], &tmp, 0);
 134                 if (*tmp) {
 135                         com_err(argv[0], 0, "Bad inode - %s", argv[i]);
 136                         goto error_out;
 137                 }
 138         }
 139
 140         iw.num_inodes = iw.inodes_left = argc;
 141
 142         retval = ext2fs_open_inode_scan(current_fs, 0, &scan);
 143         if (retval) {
 144                 com_err("ncheck", retval, "while opening inode scan");
 145                 goto error_out;
 146         }
 147         inode_size = EXT2_INODE_SIZE(current_fs->super);
 148         retval = ext2fs_get_mem(inode_size, &inode);
 149         if (retval)
 150                 goto error_out;
 151
 152         do {
 153                 retval = ext2fs_get_next_inode_full(scan, &ino,
 154                                                 inode, inode_size);
 155         } while (retval == EXT2_ET_BAD_BLOCK_IN_INODE_TABLE);
 156         if (retval) {
 157                 com_err("ncheck", retval, "while starting inode scan");
 158                 goto error_out;
 159         }
 160
 161         printf("Inode\tPathname\n");
 162         while (ino) {
 163                 if (!inode->i_links_count)
 164                         goto next;
 165                 /*
 166                  * To handle filesystems touched by 0.3c extfs; can be
 167                  * removed later.
 168                  */
 169                 if (inode->i_dtime)
 170                         goto next;
 171                 /* Ignore anything that isn't a directory */
 172                 if (!LINUX_S_ISDIR(inode->i_mode))
 173                         goto next;
 174
 175                 iw.position = 0;
 176                 iw.parent = 0;
 177                 iw.dir = ino;
 178                 iw.get_pathname_failed = 0;
 179
 180                 retval = ext2fs_dir_iterate(current_fs, ino, 0, 0,
 181                                             ncheck_proc, &iw);
 182                 ext2fs_free_mem(&iw.parent);
 183                 if (retval) {
 184                         com_err("ncheck", retval,
 185                                 "while calling ext2_dir_iterate");
 186                         goto next;
 187                 }
 188
 189                 if (iw.inodes_left == 0)
 190                         break;
 191
 192         next:
 193                 do {
 194                         retval = ext2fs_get_next_inode_full(scan, &ino,
 195                                                         inode, inode_size);
 196                 } while (retval == EXT2_ET_BAD_BLOCK_IN_INODE_TABLE);
 197
 198                 if (retval) {
 199                         com_err("ncheck", retval,
 200                                 "while doing inode scan");
 201                         goto error_out;
 202                 }
 203         }
 204
 205 error_out:
 206         ext2fs_free_mem(inode);
 207         free(iw.iarray);
 208         if (scan)
 209                 ext2fs_close_inode_scan(scan);
 210         return;
 211 }
 212
 213
 214