read_bb_file.c revision d87f198ca3250c9dff6a4002cd2bbbb5ab6f113a 
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 */
33errcode_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
78struct compat_struct {
79	void (*invalid)(ext2_filsys, blk_t);
80};
81
82static 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 */
97errcode_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