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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 "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 	blk64_t		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, blockno, buf, priv_data);
     69 			continue;
     70 		}
     71 		retval = ext2fs_badblocks_list_add(*bb_list, 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 
    110