freebsd-dev/usr.sbin/fstyp/befs.c
Piotr Pawel Stefaniak 0e92585cde fstyp: add BeFS support
A simple support for detecting BeFS (BeOS) filesystem

Submitted by:	Miguel Gocobachi
Differential Revision:	https://reviews.freebsd.org/D29917
2021-08-17 18:16:07 +02:00

71 lines
2.0 KiB
C

/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2021 Miguel Gocobachi
*
* 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"
#define B_OS_NAME_LENGTH 32
#define BEFS_BLOCK_OFFSET 512
#define BEFS_SUPER_BLOCK_MAGIC1 0x42465331
struct disk_super_block {
char name[B_OS_NAME_LENGTH];
int32_t magic1;
};
int
fstyp_befs(FILE *fp, char *label, size_t size)
{
struct disk_super_block *volume;
volume = read_buf(fp, BEFS_BLOCK_OFFSET, sizeof(*volume));
if (volume == NULL) {
return (1);
}
if (volume->magic1 == BEFS_SUPER_BLOCK_MAGIC1) {
strlcpy(label, volume->name, size);
free(volume);
return (0);
}
free(volume);
return (1);
}