1 /* 2 * Copyright (c) 2010 The DragonFly Project. All rights reserved. 3 * 4 * This code is derived from software contributed to The DragonFly Project 5 * by Alex Hornung <ahornung@gmail.com> 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in 15 * the documentation and/or other materials provided with the 16 * distribution. 17 * 3. Neither the name of The DragonFly Project nor the names of its 18 * contributors may be used to endorse or promote products derived 19 * from this software without specific, prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 24 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 25 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 26 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING, 27 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 28 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 29 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 31 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35 #include "libfsid.h" 36 37 #include <vfs/ufs/ufs_types.h> 38 #include <vfs/ufs/fs.h> 39 40 static char buffer[MAXBSIZE]; 41 42 fsid_t 43 ufs_probe(const char *dev) 44 { 45 static struct fs *fs; 46 47 if(fsid_dev_read(dev, SBOFF, sizeof(buffer), buffer) != 0) 48 return FSID_UNKNOWN; 49 50 fs = (struct fs *)&buffer; 51 52 if (fs->fs_magic != FS_MAGIC || fs->fs_bsize > MAXBSIZE || 53 (unsigned)fs->fs_bsize < sizeof(struct fs)) { 54 return FSID_UNKNOWN; 55 } 56 57 return FSID_UFS; 58 } 59 60 char * 61 ufs_volname(const char *dev) 62 { 63 static struct fs *fs; 64 65 if(fsid_dev_read(dev, SBOFF, sizeof(buffer), buffer) != 0) 66 return NULL; 67 68 fs = (struct fs *)&buffer; 69 70 if (fs->fs_magic != FS_MAGIC || fs->fs_bsize > MAXBSIZE || 71 (unsigned)fs->fs_bsize < sizeof(struct fs) || 72 fs->fs_volname[0] == '\0') { 73 return NULL; 74 } 75 76 fs->fs_volname[MAXVOLLEN - 1] = '\0'; 77 78 return fs->fs_volname; 79 } 80 81