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 Public
   8  * License.
   9  * %End-Header%
  10  */
  11
  12 #include <stdio.h>
  13 #include <string.h>
  14 #if HAVE_UNISTD_H
  15 #include <unistd.h>
  16 #endif
  17 #include <fcntl.h>
  18 #include <time.h>
  19 #if HAVE_SYS_STAT_H
  20 #include <sys/stat.h>
  21 #endif
  22 #if HAVE_SYS_TYPES_H
  23 #include <sys/types.h>
  24 #endif
  25
  26 #if EXT2_FLAT_INCLUDES
  27 #include "ext2_fs.h"
  28 #else
  29 #include <linux/ext2_fs.h>
  30 #endif
  31
  32 #include "ext2fs.h"
  33
  34 /*
  35  * Reads a list of bad blocks from  a FILE *
  36  */
  37 errcode_t ext2fs_read_bb_FILE2(ext2_filsys fs, FILE *f,
  38                                ext2_badblocks_list *bb_list,
  39                                void *private,
  40                                void (*invalid)(ext2_filsys fs,
  41                                                blk_t blk,
  42                                                char *badstr,
  43                                                void *private))
  44 {
  45         errcode_t       retval;
  46         blk_t           blockno;
  47         int             count;
  48         char            buf[128];
  49
  50         if (fs)
  51                 EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS);
  52
  53         if (!*bb_list) {
  54                 retval = ext2fs_badblocks_list_create(bb_list, 10);
  55                 if (retval)
  56                         return retval;
  57         }
  58
  59         while (!feof (f)) {
  60                 if (fgets(buf, sizeof(buf), f) == NULL)
  61                         break;
  62                 count = sscanf(buf, "%u", &blockno);
  63                 if (count <= 0)
  64                         continue;
  65                 if (fs &&
  66                     ((blockno < fs->super->s_first_data_block) ||
  67                     (blockno >= fs->super->s_blocks_count))) {
  68                         if (invalid)
  69                                 (invalid)(fs, blockno, buf, private);
  70                         continue;
  71                 }
  72                 retval = ext2fs_badblocks_list_add(*bb_list, blockno);
  73                 if (retval)
  74                         return retval;
  75         }
  76         return 0;
  77 }
  78
  79 static void call_compat_invalid(ext2_filsys fs, blk_t blk,
  80                                 char *badstr, void *private)
  81 {
  82         void (*invalid)(ext2_filsys, blk_t);
  83
  84         invalid = (void (*)(ext2_filsys, blk_t)) private;
  85         if (invalid)
  86                 invalid(fs, blk);
  87 }
  88
  89
  90 /*
  91  * Reads a list of bad blocks from  a FILE *
  92  */
  93 errcode_t ext2fs_read_bb_FILE(ext2_filsys fs, FILE *f,
  94                               ext2_badblocks_list *bb_list,
  95                               void (*invalid)(ext2_filsys fs, blk_t blk))
  96 {
  97         return ext2fs_read_bb_FILE2(fs, f, bb_list, (void *) invalid,
  98                                     call_compat_invalid);
  99 }
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