e266075649
Simply detect the exFAT filesystem name in the Volume Boot Record (superblock). PR: 214908 Reported by: <vermaden at interia.pl>
78 lines
2.4 KiB
C
78 lines
2.4 KiB
C
/*
|
|
* Copyright (c) 2017 Conrad Meyer <cem@FreeBSD.org>
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#include <stdint.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
|
|
#include "fstyp.h"
|
|
|
|
struct exfat_vbr {
|
|
char ev_jmp[3];
|
|
char ev_fsname[8];
|
|
char ev_zeros[53];
|
|
uint64_t ev_part_offset;
|
|
uint64_t ev_vol_length;
|
|
uint32_t ev_fat_offset;
|
|
uint32_t ev_fat_length;
|
|
uint32_t ev_cluster_offset;
|
|
uint32_t ev_cluster_count;
|
|
uint32_t ev_rootdir_cluster;
|
|
uint32_t ev_vol_serial;
|
|
uint16_t ev_fs_revision;
|
|
uint16_t ev_vol_flags;
|
|
uint8_t ev_log_bytes_per_sect;
|
|
uint8_t ev_log_sect_per_clust;
|
|
uint8_t ev_num_fats;
|
|
uint8_t ev_drive_sel;
|
|
uint8_t ev_percent_used;
|
|
} __packed;
|
|
|
|
int
|
|
fstyp_exfat(FILE *fp, char *label, size_t size)
|
|
{
|
|
struct exfat_vbr *ev;
|
|
|
|
ev = (struct exfat_vbr *)read_buf(fp, 0, 512);
|
|
if (ev == NULL || strncmp(ev->ev_fsname, "EXFAT ", 8) != 0)
|
|
goto fail;
|
|
|
|
/*
|
|
* Reading the volume label requires walking the root directory to look
|
|
* for a special label file. Left as an exercise for the reader.
|
|
*/
|
|
free(ev);
|
|
return (0);
|
|
|
|
fail:
|
|
free(ev);
|
|
return (1);
|
|
}
|