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      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 <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 #include "ext2_fs.h"
     27 #include "ext2fs.h"
     28 
     29 /*
     30  * Reads a list of bad blocks from  a FILE *
     31  */
     32 errcode_t ext2fs_read_bb_FILE2(ext2_filsys fs, FILE *f,
     33 			       ext2_badblocks_list *bb_list,
     34 			       void *priv_data,
     35 			       void (*invalid)(ext2_filsys fs,
     36 					       blk_t blk,
     37 					       char *badstr,
     38 					       void *priv_data))
     39 {
     40 	errcode_t	retval;
     41 	blk64_t		blockno;
     42 	int		count;
     43 	char		buf[128];
     44 
     45 	if (fs)
     46 		EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS);
     47 
     48 	if (!*bb_list) {
     49 		retval = ext2fs_badblocks_list_create(bb_list, 10);
     50 		if (retval)
     51 			return retval;
     52 	}
     53 
     54 	while (!feof (f)) {
     55 		if (fgets(buf, sizeof(buf), f) == NULL)
     56 			break;
     57 		count = sscanf(buf, "%llu", &blockno);
     58 		if (count <= 0)
     59 			continue;
     60 		/* Badblocks isn't going to be updated for 64bit */
     61 		if (blockno >> 32)
     62 			return EOVERFLOW;
     63 		if (fs &&
     64 		    ((blockno < fs->super->s_first_data_block) ||
     65 		     (blockno >= ext2fs_blocks_count(fs->super)))) {
     66 			if (invalid)
     67 				(invalid)(fs, blockno, buf, priv_data);
     68 			continue;
     69 		}
     70 		retval = ext2fs_badblocks_list_add(*bb_list, blockno);
     71 		if (retval)
     72 			return retval;
     73 	}
     74 	return 0;
     75 }
     76 
     77 struct compat_struct {
     78 	void (*invalid)(ext2_filsys, blk_t);
     79 };
     80 
     81 static void call_compat_invalid(ext2_filsys fs, blk_t blk,
     82 				char *badstr EXT2FS_ATTR((unused)),
     83 				void *priv_data)
     84 {
     85 	struct compat_struct *st;
     86 
     87 	st = (struct compat_struct *) priv_data;
     88 	if (st->invalid)
     89 		(st->invalid)(fs, blk);
     90 }
     91 
     92 
     93 /*
     94  * Reads a list of bad blocks from  a FILE *
     95  */
     96 errcode_t ext2fs_read_bb_FILE(ext2_filsys fs, FILE *f,
     97 			      ext2_badblocks_list *bb_list,
     98 			      void (*invalid)(ext2_filsys fs, blk_t blk))
     99 {
    100 	struct compat_struct st;
    101 
    102 	st.invalid = invalid;
    103 
    104 	return ext2fs_read_bb_FILE2(fs, f, bb_list, &st,
    105 				    call_compat_invalid);
    106 }
    107 
    108 
    109