1be3a49eeSEdward Tomasz Napierala /*-
2be3a49eeSEdward Tomasz Napierala * Copyright (c) 2005 Stanislav Sedov
3be3a49eeSEdward Tomasz Napierala * Copyright (c) 2014 The FreeBSD Foundation
4be3a49eeSEdward Tomasz Napierala * All rights reserved.
5be3a49eeSEdward Tomasz Napierala *
6be3a49eeSEdward Tomasz Napierala * This software was developed by Edward Tomasz Napierala under sponsorship
7be3a49eeSEdward Tomasz Napierala * from the FreeBSD Foundation.
8be3a49eeSEdward Tomasz Napierala *
9be3a49eeSEdward Tomasz Napierala * Redistribution and use in source and binary forms, with or without
10be3a49eeSEdward Tomasz Napierala * modification, are permitted provided that the following conditions
11be3a49eeSEdward Tomasz Napierala * are met:
12be3a49eeSEdward Tomasz Napierala * 1. Redistributions of source code must retain the above copyright
13be3a49eeSEdward Tomasz Napierala * notice, this list of conditions and the following disclaimer.
14be3a49eeSEdward Tomasz Napierala * 2. Redistributions in binary form must reproduce the above copyright
15be3a49eeSEdward Tomasz Napierala * notice, this list of conditions and the following disclaimer in the
16be3a49eeSEdward Tomasz Napierala * documentation and/or other materials provided with the distribution.
17be3a49eeSEdward Tomasz Napierala *
18be3a49eeSEdward Tomasz Napierala * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
19be3a49eeSEdward Tomasz Napierala * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20be3a49eeSEdward Tomasz Napierala * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21be3a49eeSEdward Tomasz Napierala * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
22be3a49eeSEdward Tomasz Napierala * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23be3a49eeSEdward Tomasz Napierala * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24be3a49eeSEdward Tomasz Napierala * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25be3a49eeSEdward Tomasz Napierala * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26be3a49eeSEdward Tomasz Napierala * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27be3a49eeSEdward Tomasz Napierala * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28be3a49eeSEdward Tomasz Napierala * SUCH DAMAGE.
29be3a49eeSEdward Tomasz Napierala */
30be3a49eeSEdward Tomasz Napierala
31be3a49eeSEdward Tomasz Napierala #include <sys/cdefs.h>
32be3a49eeSEdward Tomasz Napierala #include <stdio.h>
33be3a49eeSEdward Tomasz Napierala #include <stdint.h>
34be3a49eeSEdward Tomasz Napierala #include <stdlib.h>
35be3a49eeSEdward Tomasz Napierala #include <string.h>
36be3a49eeSEdward Tomasz Napierala
37be3a49eeSEdward Tomasz Napierala #include "fstyp.h"
38be3a49eeSEdward Tomasz Napierala
39be3a49eeSEdward Tomasz Napierala #define EXT2FS_SB_OFFSET 1024
40be3a49eeSEdward Tomasz Napierala #define EXT2_SUPER_MAGIC 0xef53
41be3a49eeSEdward Tomasz Napierala #define EXT2_DYNAMIC_REV 1
42be3a49eeSEdward Tomasz Napierala
43be3a49eeSEdward Tomasz Napierala typedef struct e2sb {
44be3a49eeSEdward Tomasz Napierala uint8_t fake1[56];
45be3a49eeSEdward Tomasz Napierala uint16_t s_magic;
46be3a49eeSEdward Tomasz Napierala uint8_t fake2[18];
47be3a49eeSEdward Tomasz Napierala uint32_t s_rev_level;
48be3a49eeSEdward Tomasz Napierala uint8_t fake3[40];
49be3a49eeSEdward Tomasz Napierala char s_volume_name[16];
50be3a49eeSEdward Tomasz Napierala } e2sb_t;
51be3a49eeSEdward Tomasz Napierala
52be3a49eeSEdward Tomasz Napierala int
fstyp_ext2fs(FILE * fp,char * label,size_t size)53be3a49eeSEdward Tomasz Napierala fstyp_ext2fs(FILE *fp, char *label, size_t size)
54be3a49eeSEdward Tomasz Napierala {
55be3a49eeSEdward Tomasz Napierala e2sb_t *fs;
56be3a49eeSEdward Tomasz Napierala char *s_volume_name;
57be3a49eeSEdward Tomasz Napierala
58be3a49eeSEdward Tomasz Napierala fs = (e2sb_t *)read_buf(fp, EXT2FS_SB_OFFSET, 512);
59be3a49eeSEdward Tomasz Napierala if (fs == NULL)
60be3a49eeSEdward Tomasz Napierala return (1);
61be3a49eeSEdward Tomasz Napierala
62be3a49eeSEdward Tomasz Napierala /* Check for magic and versio n*/
63be3a49eeSEdward Tomasz Napierala if (fs->s_magic == EXT2_SUPER_MAGIC &&
64be3a49eeSEdward Tomasz Napierala fs->s_rev_level == EXT2_DYNAMIC_REV) {
65be3a49eeSEdward Tomasz Napierala //G_LABEL_DEBUG(1, "ext2fs file system detected on %s.",
66be3a49eeSEdward Tomasz Napierala // pp->name);
67be3a49eeSEdward Tomasz Napierala } else {
68be3a49eeSEdward Tomasz Napierala free(fs);
69be3a49eeSEdward Tomasz Napierala return (1);
70be3a49eeSEdward Tomasz Napierala }
71be3a49eeSEdward Tomasz Napierala
72be3a49eeSEdward Tomasz Napierala s_volume_name = fs->s_volume_name;
73be3a49eeSEdward Tomasz Napierala /* Terminate label */
74be3a49eeSEdward Tomasz Napierala s_volume_name[sizeof(fs->s_volume_name) - 1] = '\0';
75be3a49eeSEdward Tomasz Napierala
76be3a49eeSEdward Tomasz Napierala if (s_volume_name[0] == '/')
77be3a49eeSEdward Tomasz Napierala s_volume_name += 1;
78be3a49eeSEdward Tomasz Napierala
79be3a49eeSEdward Tomasz Napierala strlcpy(label, s_volume_name, size);
80*3d2b0910SEdward Tomasz Napierala free(fs);
81be3a49eeSEdward Tomasz Napierala
82be3a49eeSEdward Tomasz Napierala return (0);
83be3a49eeSEdward Tomasz Napierala }
84