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/*
File: file_tz.c
Copyright (C) 2009 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.
*/
#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 "common.h"
#include "filegen.h"
static void register_header_check_tz(file_stat_t *file_stat);
static int header_check_tz(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 file_hint_t file_hint_tz= {
.extension="tz",
.description="Timezone info",
.min_header_distance=0,
.max_filesize=PHOTOREC_MAX_FILE_SIZE,
.recover=1,
.enable_by_default=1,
.register_header_check=®ister_header_check_tz
};
/* man 5 tzfile */
static const unsigned char tz_header[20]=
{
'T', 'Z', 'i', 'f',
0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00,
};
static const unsigned char tz2_header[20]=
{
'T', 'Z', 'i', 'f',
'2', 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00,
};
static void register_header_check_tz(file_stat_t *file_stat)
{
register_header_check(0, tz_header, sizeof(tz_header), &header_check_tz, file_stat);
register_header_check(0, tz2_header, sizeof(tz2_header), &header_check_tz, file_stat);
}
static int header_check_tz(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)
{
if(memcmp(buffer,tz_header,sizeof(tz_header))==0 ||
memcmp(buffer,tz2_header,sizeof(tz2_header))==0)
{
reset_file_recovery(file_recovery_new);
file_recovery_new->extension=file_hint_tz.extension;
return 1;
}
return 0;
}
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