1*be3a49eeSEdward Tomasz Napierala /*- 2*be3a49eeSEdward Tomasz Napierala * Copyright (c) 2005 Stanislav Sedov 3*be3a49eeSEdward Tomasz Napierala * Copyright (c) 2014 The FreeBSD Foundation 4*be3a49eeSEdward Tomasz Napierala * All rights reserved. 5*be3a49eeSEdward Tomasz Napierala * 6*be3a49eeSEdward Tomasz Napierala * This software was developed by Edward Tomasz Napierala under sponsorship 7*be3a49eeSEdward Tomasz Napierala * from the FreeBSD Foundation. 8*be3a49eeSEdward Tomasz Napierala * 9*be3a49eeSEdward Tomasz Napierala * Redistribution and use in source and binary forms, with or without 10*be3a49eeSEdward Tomasz Napierala * modification, are permitted provided that the following conditions 11*be3a49eeSEdward Tomasz Napierala * are met: 12*be3a49eeSEdward Tomasz Napierala * 1. Redistributions of source code must retain the above copyright 13*be3a49eeSEdward Tomasz Napierala * notice, this list of conditions and the following disclaimer. 14*be3a49eeSEdward Tomasz Napierala * 2. Redistributions in binary form must reproduce the above copyright 15*be3a49eeSEdward Tomasz Napierala * notice, this list of conditions and the following disclaimer in the 16*be3a49eeSEdward Tomasz Napierala * documentation and/or other materials provided with the distribution. 17*be3a49eeSEdward Tomasz Napierala * 18*be3a49eeSEdward Tomasz Napierala * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 19*be3a49eeSEdward Tomasz Napierala * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20*be3a49eeSEdward Tomasz Napierala * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21*be3a49eeSEdward Tomasz Napierala * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 22*be3a49eeSEdward Tomasz Napierala * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23*be3a49eeSEdward Tomasz Napierala * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24*be3a49eeSEdward Tomasz Napierala * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25*be3a49eeSEdward Tomasz Napierala * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26*be3a49eeSEdward Tomasz Napierala * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27*be3a49eeSEdward Tomasz Napierala * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28*be3a49eeSEdward Tomasz Napierala * SUCH DAMAGE. 29*be3a49eeSEdward Tomasz Napierala */ 30*be3a49eeSEdward Tomasz Napierala 31*be3a49eeSEdward Tomasz Napierala #include <sys/cdefs.h> 32*be3a49eeSEdward Tomasz Napierala __FBSDID("$FreeBSD$"); 33*be3a49eeSEdward Tomasz Napierala 34*be3a49eeSEdward Tomasz Napierala #include <stdio.h> 35*be3a49eeSEdward Tomasz Napierala #include <stdint.h> 36*be3a49eeSEdward Tomasz Napierala #include <stdlib.h> 37*be3a49eeSEdward Tomasz Napierala #include <string.h> 38*be3a49eeSEdward Tomasz Napierala 39*be3a49eeSEdward Tomasz Napierala #include "fstyp.h" 40*be3a49eeSEdward Tomasz Napierala 41*be3a49eeSEdward Tomasz Napierala #define EXT2FS_SB_OFFSET 1024 42*be3a49eeSEdward Tomasz Napierala #define EXT2_SUPER_MAGIC 0xef53 43*be3a49eeSEdward Tomasz Napierala #define EXT2_DYNAMIC_REV 1 44*be3a49eeSEdward Tomasz Napierala 45*be3a49eeSEdward Tomasz Napierala typedef struct e2sb { 46*be3a49eeSEdward Tomasz Napierala uint8_t fake1[56]; 47*be3a49eeSEdward Tomasz Napierala uint16_t s_magic; 48*be3a49eeSEdward Tomasz Napierala uint8_t fake2[18]; 49*be3a49eeSEdward Tomasz Napierala uint32_t s_rev_level; 50*be3a49eeSEdward Tomasz Napierala uint8_t fake3[40]; 51*be3a49eeSEdward Tomasz Napierala char s_volume_name[16]; 52*be3a49eeSEdward Tomasz Napierala } e2sb_t; 53*be3a49eeSEdward Tomasz Napierala 54*be3a49eeSEdward Tomasz Napierala int 55*be3a49eeSEdward Tomasz Napierala fstyp_ext2fs(FILE *fp, char *label, size_t size) 56*be3a49eeSEdward Tomasz Napierala { 57*be3a49eeSEdward Tomasz Napierala e2sb_t *fs; 58*be3a49eeSEdward Tomasz Napierala char *s_volume_name; 59*be3a49eeSEdward Tomasz Napierala 60*be3a49eeSEdward Tomasz Napierala fs = (e2sb_t *)read_buf(fp, EXT2FS_SB_OFFSET, 512); 61*be3a49eeSEdward Tomasz Napierala if (fs == NULL) 62*be3a49eeSEdward Tomasz Napierala return (1); 63*be3a49eeSEdward Tomasz Napierala 64*be3a49eeSEdward Tomasz Napierala /* Check for magic and versio n*/ 65*be3a49eeSEdward Tomasz Napierala if (fs->s_magic == EXT2_SUPER_MAGIC && 66*be3a49eeSEdward Tomasz Napierala fs->s_rev_level == EXT2_DYNAMIC_REV) { 67*be3a49eeSEdward Tomasz Napierala //G_LABEL_DEBUG(1, "ext2fs file system detected on %s.", 68*be3a49eeSEdward Tomasz Napierala // pp->name); 69*be3a49eeSEdward Tomasz Napierala } else { 70*be3a49eeSEdward Tomasz Napierala free(fs); 71*be3a49eeSEdward Tomasz Napierala return (1); 72*be3a49eeSEdward Tomasz Napierala } 73*be3a49eeSEdward Tomasz Napierala 74*be3a49eeSEdward Tomasz Napierala s_volume_name = fs->s_volume_name; 75*be3a49eeSEdward Tomasz Napierala /* Terminate label */ 76*be3a49eeSEdward Tomasz Napierala s_volume_name[sizeof(fs->s_volume_name) - 1] = '\0'; 77*be3a49eeSEdward Tomasz Napierala 78*be3a49eeSEdward Tomasz Napierala if (s_volume_name[0] == '/') 79*be3a49eeSEdward Tomasz Napierala s_volume_name += 1; 80*be3a49eeSEdward Tomasz Napierala 81*be3a49eeSEdward Tomasz Napierala /* Check for volume label */ 82*be3a49eeSEdward Tomasz Napierala if (s_volume_name[0] == '\0') { 83*be3a49eeSEdward Tomasz Napierala free(fs); 84*be3a49eeSEdward Tomasz Napierala return (1); 85*be3a49eeSEdward Tomasz Napierala } 86*be3a49eeSEdward Tomasz Napierala 87*be3a49eeSEdward Tomasz Napierala strlcpy(label, s_volume_name, size); 88*be3a49eeSEdward Tomasz Napierala 89*be3a49eeSEdward Tomasz Napierala return (0); 90*be3a49eeSEdward Tomasz Napierala } 91