1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
|
/*
File: file_dir.c
Copyright (C) 1998-2007 Christophe GRENIER <grenier@cgsecurity.org>
This software is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License along
with this program; if not, write the Free Software Foundation, Inc., 51
Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#if !defined(SINGLE_FORMAT) || defined(SINGLE_FORMAT_dir)
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#ifdef HAVE_STRING_H
#include <string.h>
#endif
#ifdef HAVE_TIME_H
#include <time.h>
#endif
#include <stdio.h>
#include "types.h"
#include "filegen.h"
#include "common.h"
#include "fat_common.h"
/*@ requires valid_register_header_check(file_stat); */
static void register_header_check_dir(file_stat_t *file_stat);
const file_hint_t file_hint_dir= {
.extension="fat",
.description="FAT subdirectory",
.max_filesize=PHOTOREC_MAX_FILE_SIZE,
.recover=0,
.enable_by_default=1,
.register_header_check=®ister_header_check_dir
};
/*@
@ requires file_recovery->file_rename==&file_rename_fatdir;
@ requires valid_file_rename_param(file_recovery);
@ ensures valid_file_rename_result(file_recovery);
@*/
static void file_rename_fatdir(file_recovery_t *file_recovery)
{
unsigned char buffer[512];
char buffer_cluster[32];
FILE *file;
int buffer_size;
unsigned int cluster;
if((file=fopen(file_recovery->filename, "rb"))==NULL)
return;
buffer_size=fread(buffer, 1, sizeof(buffer), file);
fclose(file);
if(buffer_size<32)
return;
/*@ assert buffer_size >= 32; */
cluster=fat_get_cluster_from_entry((const struct msdos_dir_entry *)&buffer[0]);
sprintf(buffer_cluster, "cluster_%u", cluster);
#if defined(DISABLED_FOR_FRAMAC)
buffer_cluster[sizeof(buffer_cluster)-1]='\0';
#endif
file_rename(file_recovery, buffer_cluster, strlen(buffer_cluster), 0, NULL, 1);
}
/*@
@ requires file_recovery->data_check == &data_check_fatdir;
@ requires buffer_size >= 2;
@ requires valid_data_check_param(buffer, buffer_size, file_recovery);
@ terminates \true;
@ ensures valid_data_check_result(\result, file_recovery);
@ ensures \result == DC_STOP;
@ assigns file_recovery->calculated_file_size;
@*/
static data_check_t data_check_fatdir(const unsigned char *buffer, const unsigned int buffer_size, file_recovery_t *file_recovery)
{
/* Save only one cluster */
file_recovery->calculated_file_size=buffer_size/2;
return DC_STOP;
}
/*@
@ requires buffer_size >= sizeof(struct msdos_dir_entry);
@ requires separation: \separated(&file_hint_dir, buffer+(..), file_recovery, file_recovery_new);
@ requires valid_header_check_param(buffer, buffer_size, safe_header_only, file_recovery, file_recovery_new);
@ ensures valid_header_check_result(\result, file_recovery_new);
@ assigns *file_recovery_new;
@*/
static int header_check_dir(const unsigned char *buffer, const unsigned int buffer_size, const unsigned int safe_header_only, const file_recovery_t *file_recovery, file_recovery_t *file_recovery_new)
{
const struct msdos_dir_entry *de=(const struct msdos_dir_entry*)buffer;
if(!is_fat_directory(buffer))
return 0;
reset_file_recovery(file_recovery_new);
file_recovery_new->extension=file_hint_dir.extension;
file_recovery_new->data_check=&data_check_fatdir;
file_recovery_new->file_check=&file_check_size;
file_recovery_new->file_rename=&file_rename_fatdir;
file_recovery_new->time=date_dos2unix(le16(de->time),le16(de->date));
/*@ assert valid_file_recovery(file_recovery_new); */
return 1;
}
static void register_header_check_dir(file_stat_t *file_stat)
{
register_header_check(0, ". ", 8+3, &header_check_dir, file_stat);
}
#endif
|
