2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2002 Juli Mallett. All rights reserved.
6 * This software was written by Juli Mallett <jmallett@FreeBSD.org> for the
7 * FreeBSD project. Redistribution and use in source and binary forms, with
8 * or without modification, are permitted provided that the following
11 * 1. Redistribution of source code must retain the above copyright notice,
12 * this list of conditions and the following disclaimer.
13 * 2. Redistribution in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
19 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
20 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
21 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
22 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
23 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
25 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
26 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
27 * POSSIBILITY OF SUCH DAMAGE.
30 #include <sys/cdefs.h>
31 __FBSDID("$FreeBSD$");
33 #include <sys/param.h>
34 #include <sys/mount.h>
35 #include <sys/disklabel.h>
38 #include <ufs/ufs/ufsmount.h>
39 #include <ufs/ufs/dinode.h>
40 #include <ufs/ffs/fs.h>
53 /* Internally, track the 'name' value, it's ours. */
54 #define MINE_NAME 0x01
55 /* Track if its fd points to a writable device. */
56 #define MINE_WRITE 0x02
59 ufs_disk_close(struct uufsd *disk)
63 if (disk->d_inoblock != NULL) {
64 free(disk->d_inoblock);
65 disk->d_inoblock = NULL;
67 if (disk->d_mine & MINE_NAME) {
68 free((char *)(uintptr_t)disk->d_name);
71 if (disk->d_sbcsum != NULL) {
73 disk->d_sbcsum = NULL;
79 ufs_disk_fillout(struct uufsd *disk, const char *name)
81 if (ufs_disk_fillout_blank(disk, name) == -1) {
84 if (sbread(disk) == -1) {
85 ERROR(disk, "could not read superblock to fill out disk");
92 ufs_disk_fillout_blank(struct uufsd *disk, const char *name)
104 again: if ((ret = stat(name, &st)) < 0) {
106 snprintf(dev, sizeof(dev), "%s%s", _PATH_DEV, name);
111 * The given object doesn't exist, but don't panic just yet -
112 * it may be still mount point listed in /etc/fstab, but without
113 * existing corresponding directory.
117 if (ret >= 0 && S_ISREG(st.st_mode)) {
118 /* Possibly a disk image, give it a try. */
120 } else if (ret >= 0 && S_ISCHR(st.st_mode)) {
121 /* This is what we need, do nothing. */
123 } else if ((fs = getfsfile(name)) != NULL) {
125 * The given mount point is listed in /etc/fstab.
126 * It is possible that someone unmounted file system by hand
127 * and different file system is mounted on this mount point,
128 * but we still prefer /etc/fstab entry, because on the other
129 * hand, there could be /etc/fstab entry for this mount
130 * point, but file system is not mounted yet (eg. noauto) and
131 * statfs(2) will point us at different file system.
134 } else if (ret >= 0 && S_ISDIR(st.st_mode)) {
136 * The mount point is not listed in /etc/fstab, so it may be
137 * file system mounted by hand.
139 if (statfs(name, &sfs) < 0) {
140 ERROR(disk, "could not find special device");
143 strlcpy(dev, sfs.f_mntfromname, sizeof(dev));
146 ERROR(disk, "could not find special device");
149 fd = open(name, O_RDONLY);
151 ERROR(disk, "could not open special device");
158 disk->d_inoblock = NULL;
164 disk->d_error = NULL;
165 disk->d_sbcsum = NULL;
170 ERROR(disk, "could not allocate memory for disk name");
173 disk->d_mine |= MINE_NAME;
181 ufs_disk_write(struct uufsd *disk)
185 if (disk->d_mine & MINE_WRITE)
190 disk->d_fd = open(disk->d_name, O_RDWR);
191 if (disk->d_fd < 0) {
192 ERROR(disk, "failed to open disk for writing");
196 disk->d_mine |= MINE_WRITE;