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1 | #!/bin/sh | |
2 | #============================================================================== | |
3 | # mount.vdi | |
4 | # Copyright (C) Elan Ruusamäe <glen@pld-linux.org>, 2008 | |
5 | # | |
6 | # This program is free software; you can redistribute it and/or | |
7 | # modify it under the terms of the GNU General Public License as | |
8 | # published by the Free Software Foundation; either version 2 of | |
9 | # the License, or (at your option) any later version. | |
10 | # | |
11 | # This program is distributed in the hope that it will be useful, | |
12 | # but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | # General Public License for more details. | |
15 | # | |
16 | # You should have received a copy of the GNU General Public | |
17 | # License along with this program; if not, write to: | |
18 | # Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, | |
19 | # Boston, MA 02110-1301 USA | |
20 | # | |
21 | # -- For details, see the file named "LICENSE.GPLv2" | |
22 | #============================================================================== | |
23 | ||
24 | # Sanitize environment | |
25 | export PATH=/bin:/sbin:/usr/bin:/usr/sbin | |
26 | ||
27 | # Commands | |
28 | LOSETUP=/sbin/losetup | |
29 | MOUNT=/bin/mount | |
30 | ||
31 | PROGRAM=${0##*/} | |
32 | OPTIONS= | |
33 | FSTYPE= | |
34 | ||
35 | USAGE="VDI image mountpoint [-o options,...] | |
36 | ||
37 | Options: | |
38 | partition=<number> Specify partition to mount | |
39 | fstype=<fstype> Specify FS type instead of autodetecting | |
40 | " | |
41 | ||
42 | # This is braindead, two first args are dev and mountpoint if invoked from | |
43 | # mount(1), but could be option if invoked from mount.vdi(1) | |
44 | if [ -n "$1" ] && [[ "$1" != -* ]]; then | |
45 | DEVICE=$1 | |
46 | shift | |
47 | fi | |
48 | if [ -n "$1" ] && [[ "$1" != -* ]]; then | |
49 | MOUNTPOINT=$1 | |
50 | shift | |
51 | fi | |
52 | ||
53 | while :; do | |
54 | case "$1" in | |
55 | -h | "-?" ) | |
56 | echo >&2 "Usage: $PROGRAM $USAGE" | |
57 | exit 0 ;; | |
58 | -o ) | |
59 | OPTIONS="$2"; | |
60 | shift ;; | |
61 | -?* ) | |
62 | echo >&2 "$PROGRAM: unrecognized option: $1" | |
63 | exit 1 ;; | |
64 | *) | |
65 | break ;; | |
66 | esac | |
67 | shift | |
68 | done | |
69 | ||
70 | if [ -z "$DEVICE" ]; then | |
71 | echo >&2 "$PROGRAM: device to mount not specified" | |
72 | exit 1 | |
73 | fi | |
74 | ||
75 | if [ -z "$MOUNTPOINT" ]; then | |
76 | echo >&2 "$PROGRAM: mount point not specified" | |
77 | exit 1 | |
78 | fi | |
79 | ||
80 | if [ ! -f "$DEVICE" ]; then | |
81 | echo >&2 "$PROGRAM: $DEVICE is not a file" | |
82 | exit 1 | |
83 | fi | |
84 | ||
85 | if [ ! -d "$MOUNTPOINT" ]; then | |
86 | echo >&2 "$PROGRAM: $MOUNTPOINT is not a directory" | |
87 | exit 1 | |
88 | fi | |
89 | ||
90 | # check magic | |
91 | magic=$(head -n 1 "$DEVICE") | |
92 | if [ "$magic" != "<<< innotek VirtualBox Disk Image >>>" ]; then | |
93 | echo >&2 "$PROGRAM: $DEVICE: bad magic, not VDI image" | |
94 | exit 1 | |
95 | fi | |
96 | ||
97 | MOUNTOPTIONS= | |
98 | PARTITION= | |
99 | OFFSET= | |
100 | OLDIFS=$IFS | |
101 | IFS=", " | |
102 | for opt in $OPTIONS; do | |
103 | KEY=${opt%=*}; | |
104 | VAL=${opt#*=}; | |
105 | case "$KEY" in | |
106 | part|partition) | |
107 | PARTITION="$VAL" | |
108 | ;; | |
109 | fstype) | |
110 | FSTYPE="$VAL" | |
111 | ;; | |
112 | *) | |
113 | if [ -z "$MOUNTOPTIONS" ]; then | |
114 | MOUNTOPTIONS="$opt" | |
115 | else | |
116 | MOUNTOPTIONS="$MOUNTOPTIONS,$opt" | |
117 | fi | |
118 | ;; | |
119 | esac | |
120 | done | |
121 | IFS="$OLDIFS" | |
122 | ||
123 | if [ -z "$PARTITION" ]; then | |
124 | echo >&2 "$PROGRAM: missing partition option" | |
125 | exit 1 | |
126 | fi | |
127 | ||
128 | # offset when disk starts | |
129 | dskoff=8704 | |
130 | ||
131 | # find free loop device. XXX race possible | |
132 | imgdev=$(losetup -f) | |
133 | losetup $imgdev -o $dskoff "$DEVICE" | |
134 | # http://vserver.13thfloor.at/Stuff/QEMU/hdloop.sh | |
135 | sfd=$(/sbin/sfdisk -dump $imgdev 2>/dev/null | sed -n ' | |
136 | /:/ s/[a-zA-Z]*=\ *\([0-9a-f]*\)\(,\|$\)/\1/g; | |
137 | T; s/^.*:\ //; p' | tr ' ' '.') | |
138 | losetup -d $imgdev | |
139 | ||
140 | getoffset() { | |
141 | pstart=$1 | |
142 | psize=$2 | |
143 | ||
144 | blksize=512 | |
145 | offset=$((pstart*blksize)) | |
146 | size=$((psize*blksize)) | |
147 | echo $((offset+dskoff)) | |
148 | } | |
149 | ||
150 | p=1 | |
151 | for a in $sfd; do | |
152 | if [ "$p" = "$PARTITION" ]; then | |
153 | OFFSET=$(getoffset $(echo "$a" | tr '.' ' ')) | |
154 | fi | |
155 | x=$((p++)) | |
156 | done | |
157 | ||
158 | if [ -z "$OFFSET" ]; then | |
159 | echo >&2 "$PROGRAM: couldn't figure out offset, perhaps out of range?" | |
160 | exit 1 | |
161 | fi | |
162 | ||
163 | if [ -z "$MOUNTOPTIONS" ]; then | |
164 | MOUNTOPTIONS="offset=$OFFSET" | |
165 | else | |
166 | MOUNTOPTIONS="$MOUNTOPTIONS,offset=$OFFSET" | |
167 | fi | |
168 | ||
169 | # $MOUNTPOINT might not exist as mount can try to read it from /etc/fstab | |
170 | "$MOUNT" ${FSTYPE:+-t "$FSTYPE"} ${MOUNTOPTIONS:+-o "$MOUNTOPTIONS"} "$DEVICE" "$MOUNTPOINT" | |
171 | if [ $? -ne 0 ]; then | |
172 | echo >&2 "$PROGRAM: error mounting $DEVICE" | |
173 | fi |