lib/ext2fs/read_bb_file.c

   1 /*
   2  * read_bb_file.c --- read a list of bad blocks from a FILE *
   3  *
   4  * Copyright (C) 1994, 1995, 2000 Theodore Ts'o.
   5  *
   6  * %Begin-Header%
   7  * This file may be redistributed under the terms of the GNU Library
   8  * General Public License, version 2.
   9  * %End-Header%
  10  */
  11
  12 #include "config.h"
  13 #include <stdio.h>
  14 #include <string.h>
  15 #if HAVE_UNISTD_H
  16 #include <unistd.h>
  17 #endif
  18 #include <fcntl.h>
  19 #include <time.h>
  20 #if HAVE_SYS_STAT_H
  21 #include <sys/stat.h>
  22 #endif
  23 #if HAVE_SYS_TYPES_H
  24 #include <sys/types.h>
  25 #endif
  26
  27 #include "ext2_fs.h"
  28 #include "ext2fs.h"
  29
  30 /*
  31  * Reads a list of bad blocks from  a FILE *
  32  */
  33 errcode_t ext2fs_read_bb_FILE2(ext2_filsys fs, FILE *f,
  34                                ext2_badblocks_list *bb_list,
  35                                void *priv_data,
  36                                void (*invalid)(ext2_filsys fs,
  37                                                blk_t blk,
  38                                                char *badstr,
  39                                                void *priv_data))
  40 {
  41         errcode_t       retval;
  42         unsigned long long blockno;
  43         int             count;
  44         char            buf[128];
  45
  46         if (fs)
  47                 EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS);
  48
  49         if (!*bb_list) {
  50                 retval = ext2fs_badblocks_list_create(bb_list, 10);
  51                 if (retval)
  52                         return retval;
  53         }
  54
  55         while (!feof (f)) {
  56                 if (fgets(buf, sizeof(buf), f) == NULL)
  57                         break;
  58                 count = sscanf(buf, "%llu", &blockno);
  59                 if (count <= 0)
  60                         continue;
  61                 /* Badblocks isn't going to be updated for 64bit */
  62                 if (blockno >> 32)
  63                         return EOVERFLOW;
  64                 if (fs &&
  65                     ((blockno < fs->super->s_first_data_block) ||
  66                      (blockno >= ext2fs_blocks_count(fs->super)))) {
  67                         if (invalid)
  68                                 (invalid)(fs, (blk64_t) blockno, buf, priv_data);
  69                         continue;
  70                 }
  71                 retval = ext2fs_badblocks_list_add(*bb_list, (blk64_t) blockno);
  72                 if (retval)
  73                         return retval;
  74         }
  75         return 0;
  76 }
  77
  78 struct compat_struct {
  79         void (*invalid)(ext2_filsys, blk_t);
  80 };
  81
  82 static void call_compat_invalid(ext2_filsys fs, blk_t blk,
  83                                 char *badstr EXT2FS_ATTR((unused)),
  84                                 void *priv_data)
  85 {
  86         struct compat_struct *st;
  87
  88         st = (struct compat_struct *) priv_data;
  89         if (st->invalid)
  90                 (st->invalid)(fs, blk);
  91 }
  92
  93
  94 /*
  95  * Reads a list of bad blocks from  a FILE *
  96  */
  97 errcode_t ext2fs_read_bb_FILE(ext2_filsys fs, FILE *f,
  98                               ext2_badblocks_list *bb_list,
  99                               void (*invalid)(ext2_filsys fs, blk_t blk))
 100 {
 101         struct compat_struct st;
 102
 103         st.invalid = invalid;
 104
 105         return ext2fs_read_bb_FILE2(fs, f, bb_list, &st,
 106                                     call_compat_invalid);
 107 }
 108
 109