1 /* 2 * Copyright (c) 2002 Juli Mallett. All rights reserved. 3 * 4 * This software was written by Juli Mallett <jmallett@FreeBSD.org> for the 5 * FreeBSD project. Redistribution and use in source and binary forms, with 6 * or without modification, are permitted provided that the following 7 * conditions are met: 8 * 9 * 1. Redistribution of source code must retain the above copyright notice, 10 * this list of conditions and the following disclaimer. 11 * 2. Redistribution in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 17 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 18 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, 19 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 20 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 21 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 23 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 24 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 25 * POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28 #include <sys/cdefs.h> 29 __FBSDID("$FreeBSD$"); 30 31 #include <sys/param.h> 32 #include <sys/mount.h> 33 #include <sys/disklabel.h> 34 #include <sys/stat.h> 35 36 #include <ufs/ufs/ufsmount.h> 37 #include <ufs/ufs/dinode.h> 38 #include <ufs/ffs/fs.h> 39 40 #include <errno.h> 41 #include <fcntl.h> 42 #include <fstab.h> 43 #include <paths.h> 44 #include <stdio.h> 45 #include <stdlib.h> 46 #include <string.h> 47 #include <unistd.h> 48 49 #include <libufs.h> 50 51 /* Internally, track the 'name' value, it's ours. */ 52 #define MINE_NAME 0x01 53 54 struct uufsd * 55 ufs_disk_ctor(const char *name) 56 { 57 struct uufsd *new; 58 59 new = NULL; 60 61 ERROR(new, NULL); 62 63 new = malloc(sizeof(*new)); 64 if (new == NULL) { 65 ERROR(new, "unable to allocate memory for disk"); 66 return NULL; 67 } 68 69 if (ufs_disk_fillout(new, name) == -1) { 70 ERROR(new, "could not fill out disk"); 71 free(new); 72 return NULL; 73 } 74 75 return new; 76 } 77 78 void 79 ufs_disk_dtor(struct uufsd **diskp) 80 { 81 struct uufsd *disk; 82 83 if (diskp != NULL) 84 disk = *diskp; 85 else 86 return; 87 88 ERROR(disk, NULL); 89 90 ufs_disk_close(disk); 91 free(disk); 92 *diskp = NULL; 93 } 94 95 int 96 ufs_disk_close(struct uufsd *disk) 97 { 98 ERROR(disk, NULL); 99 close(disk->d_fd); 100 if (disk->d_inoblock != NULL) { 101 free(disk->d_inoblock); 102 disk->d_inoblock = NULL; 103 } 104 if (disk->d_mine & MINE_NAME) { 105 free((char *)(uintptr_t)disk->d_name); 106 disk->d_name = NULL; 107 } 108 return 0; 109 } 110 111 int 112 ufs_disk_fillout(struct uufsd *disk, const char *name) 113 { 114 if (ufs_disk_fillout_blank(disk, name) == -1) { 115 return -1; 116 } 117 if (sbread(disk) == -1) { 118 ERROR(disk, "could not read superblock to fill out disk"); 119 return -1; 120 } 121 } 122 123 int 124 ufs_disk_fillout_blank(struct uufsd *disk, const char *name) 125 { 126 struct stat st; 127 struct fstab *fs; 128 const char *oname; 129 char dev[MAXPATHLEN]; 130 int fd; 131 132 ERROR(disk, NULL); 133 134 oname = name; 135 fs = getfsfile(name); 136 if (fs != NULL) 137 name = fs->fs_spec; 138 again: if (stat(name, &st) < 0) { 139 if (*name != '/') { 140 if (*name == 'r') 141 name++; 142 snprintf(dev, sizeof(dev), "%s%s", _PATH_DEV, name); 143 name = dev; 144 goto again; 145 } 146 ERROR(disk, "could not find special device"); 147 return -1; 148 } 149 fd = open(name, O_RDONLY); 150 if (fd == -1) { 151 ERROR(disk, "could not open special device"); 152 return -1; 153 } 154 155 disk->d_bsize = 1; 156 disk->d_ccg = 0; 157 disk->d_fd = fd; 158 disk->d_inoblock = NULL; 159 disk->d_inomin = 0; 160 disk->d_inomax = 0; 161 disk->d_lcg = 0; 162 disk->d_mine = 0; 163 disk->d_ufs = 0; 164 disk->d_error = NULL; 165 166 if (oname != name) { 167 name = strdup(name); 168 if (name == NULL) { 169 ERROR(disk, "could not allocate memory for disk name"); 170 return -1; 171 } 172 disk->d_mine |= MINE_NAME; 173 } 174 disk->d_name = name; 175 176 return 0; 177 } 178