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 /* Track if its fd points to a writable device. */ 54 #define MINE_WRITE 0x02 55 56 int 57 ufs_disk_close(struct uufsd *disk) 58 { 59 ERROR(disk, NULL); 60 close(disk->d_fd); 61 if (disk->d_inoblock != NULL) { 62 free(disk->d_inoblock); 63 disk->d_inoblock = NULL; 64 } 65 if (disk->d_mine & MINE_NAME) { 66 free((char *)(uintptr_t)disk->d_name); 67 disk->d_name = NULL; 68 } 69 return (0); 70 } 71 72 int 73 ufs_disk_fillout(struct uufsd *disk, const char *name) 74 { 75 if (ufs_disk_fillout_blank(disk, name) == -1) { 76 return (-1); 77 } 78 if (sbread(disk) == -1) { 79 ERROR(disk, "could not read superblock to fill out disk"); 80 return (-1); 81 } 82 return (0); 83 } 84 85 int 86 ufs_disk_fillout_blank(struct uufsd *disk, const char *name) 87 { 88 struct stat st; 89 struct fstab *fs; 90 const char *oname; 91 char dev[MAXPATHLEN]; 92 int fd; 93 94 ERROR(disk, NULL); 95 96 oname = name; 97 fs = getfsfile(name); 98 if (fs != NULL) 99 name = fs->fs_spec; 100 again: if (stat(name, &st) < 0) { 101 if (*name != '/') { 102 if (*name == 'r') 103 name++; 104 snprintf(dev, sizeof(dev), "%s%s", _PATH_DEV, name); 105 name = dev; 106 goto again; 107 } 108 ERROR(disk, "could not find special device"); 109 return (-1); 110 } 111 fd = open(name, O_RDONLY); 112 if (fd == -1) { 113 ERROR(disk, "could not open special device"); 114 return (-1); 115 } 116 117 disk->d_bsize = 1; 118 disk->d_ccg = 0; 119 disk->d_fd = fd; 120 disk->d_inoblock = NULL; 121 disk->d_inomin = 0; 122 disk->d_inomax = 0; 123 disk->d_lcg = 0; 124 disk->d_mine = 0; 125 disk->d_ufs = 0; 126 disk->d_error = NULL; 127 128 if (oname != name) { 129 name = strdup(name); 130 if (name == NULL) { 131 ERROR(disk, "could not allocate memory for disk name"); 132 return (-1); 133 } 134 disk->d_mine |= MINE_NAME; 135 } 136 disk->d_name = name; 137 138 return (0); 139 } 140 141 int 142 ufs_disk_write(struct uufsd *disk) 143 { 144 ERROR(disk, NULL); 145 146 if (disk->d_mine & MINE_WRITE) 147 return (0); 148 149 close(disk->d_fd); 150 151 disk->d_fd = open(disk->d_name, O_RDWR); 152 if (disk->d_fd < 0) { 153 ERROR(disk, "failed to open disk for writing"); 154 return (-1); 155 } 156 157 disk->d_mine |= MINE_WRITE; 158 159 return (0); 160 } 161