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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 | |
24855e50 ER |
30 | SFDISK=/sbin/sfdisk |
31 | SED=/bin/sed | |
299eae76 ER |
32 | |
33 | PROGRAM=${0##*/} | |
7e899501 | 34 | MOUNTARGS= |
299eae76 ER |
35 | OPTIONS= |
36 | FSTYPE= | |
37 | ||
24855e50 | 38 | USAGE="<VDI image> <mountpoint> [-o options,...] |
299eae76 ER |
39 | |
40 | Options: | |
41 | partition=<number> Specify partition to mount | |
42 | fstype=<fstype> Specify FS type instead of autodetecting | |
43 | " | |
44 | ||
45 | # This is braindead, two first args are dev and mountpoint if invoked from | |
46 | # mount(1), but could be option if invoked from mount.vdi(1) | |
47 | if [ -n "$1" ] && [[ "$1" != -* ]]; then | |
48 | DEVICE=$1 | |
49 | shift | |
50 | fi | |
51 | if [ -n "$1" ] && [[ "$1" != -* ]]; then | |
52 | MOUNTPOINT=$1 | |
53 | shift | |
54 | fi | |
55 | ||
56 | while :; do | |
57 | case "$1" in | |
58 | -h | "-?" ) | |
59 | echo >&2 "Usage: $PROGRAM $USAGE" | |
60 | exit 0 ;; | |
7e899501 | 61 | -o) |
299eae76 ER |
62 | OPTIONS="$2"; |
63 | shift ;; | |
7e899501 ER |
64 | -n) |
65 | MOUNTARGS="$MOUNTARGS $1" | |
66 | ;; | |
299eae76 ER |
67 | -?* ) |
68 | echo >&2 "$PROGRAM: unrecognized option: $1" | |
69 | exit 1 ;; | |
70 | *) | |
71 | break ;; | |
72 | esac | |
73 | shift | |
74 | done | |
75 | ||
76 | if [ -z "$DEVICE" ]; then | |
77 | echo >&2 "$PROGRAM: device to mount not specified" | |
78 | exit 1 | |
79 | fi | |
80 | ||
81 | if [ -z "$MOUNTPOINT" ]; then | |
82 | echo >&2 "$PROGRAM: mount point not specified" | |
83 | exit 1 | |
84 | fi | |
85 | ||
86 | if [ ! -f "$DEVICE" ]; then | |
87 | echo >&2 "$PROGRAM: $DEVICE is not a file" | |
88 | exit 1 | |
89 | fi | |
90 | ||
91 | if [ ! -d "$MOUNTPOINT" ]; then | |
92 | echo >&2 "$PROGRAM: $MOUNTPOINT is not a directory" | |
93 | exit 1 | |
94 | fi | |
95 | ||
96 | # check magic | |
97 | magic=$(head -n 1 "$DEVICE") | |
98 | if [ "$magic" != "<<< innotek VirtualBox Disk Image >>>" ]; then | |
99 | echo >&2 "$PROGRAM: $DEVICE: bad magic, not VDI image" | |
100 | exit 1 | |
101 | fi | |
102 | ||
103 | MOUNTOPTIONS= | |
104 | PARTITION= | |
105 | OFFSET= | |
106 | OLDIFS=$IFS | |
107 | IFS=", " | |
108 | for opt in $OPTIONS; do | |
109 | KEY=${opt%=*}; | |
110 | VAL=${opt#*=}; | |
111 | case "$KEY" in | |
112 | part|partition) | |
113 | PARTITION="$VAL" | |
114 | ;; | |
115 | fstype) | |
116 | FSTYPE="$VAL" | |
117 | ;; | |
118 | *) | |
119 | if [ -z "$MOUNTOPTIONS" ]; then | |
120 | MOUNTOPTIONS="$opt" | |
121 | else | |
122 | MOUNTOPTIONS="$MOUNTOPTIONS,$opt" | |
123 | fi | |
124 | ;; | |
125 | esac | |
126 | done | |
127 | IFS="$OLDIFS" | |
128 | ||
129 | if [ -z "$PARTITION" ]; then | |
130 | echo >&2 "$PROGRAM: missing partition option" | |
131 | exit 1 | |
132 | fi | |
133 | ||
134 | # offset when disk starts | |
135 | dskoff=8704 | |
136 | ||
137 | # find free loop device. XXX race possible | |
24855e50 ER |
138 | imgdev=$($LOSETUP -f) |
139 | $LOSETUP $imgdev -o $dskoff "$DEVICE" | |
299eae76 | 140 | # http://vserver.13thfloor.at/Stuff/QEMU/hdloop.sh |
24855e50 | 141 | sfd=$($SFDISK -dump $imgdev 2>/dev/null | $SED -n ' |
299eae76 ER |
142 | /:/ s/[a-zA-Z]*=\ *\([0-9a-f]*\)\(,\|$\)/\1/g; |
143 | T; s/^.*:\ //; p' | tr ' ' '.') | |
24855e50 | 144 | $LOSETUP -d $imgdev |
299eae76 ER |
145 | |
146 | getoffset() { | |
147 | pstart=$1 | |
148 | psize=$2 | |
149 | ||
150 | blksize=512 | |
151 | offset=$((pstart*blksize)) | |
152 | size=$((psize*blksize)) | |
153 | echo $((offset+dskoff)) | |
154 | } | |
155 | ||
156 | p=1 | |
157 | for a in $sfd; do | |
158 | if [ "$p" = "$PARTITION" ]; then | |
159 | OFFSET=$(getoffset $(echo "$a" | tr '.' ' ')) | |
160 | fi | |
161 | x=$((p++)) | |
162 | done | |
163 | ||
164 | if [ -z "$OFFSET" ]; then | |
165 | echo >&2 "$PROGRAM: couldn't figure out offset, perhaps out of range?" | |
166 | exit 1 | |
167 | fi | |
168 | ||
169 | if [ -z "$MOUNTOPTIONS" ]; then | |
170 | MOUNTOPTIONS="offset=$OFFSET" | |
171 | else | |
172 | MOUNTOPTIONS="$MOUNTOPTIONS,offset=$OFFSET" | |
173 | fi | |
174 | ||
175 | # $MOUNTPOINT might not exist as mount can try to read it from /etc/fstab | |
24855e50 | 176 | $MOUNT $MOUNTARGS ${FSTYPE:+-t "$FSTYPE"} ${MOUNTOPTIONS:+-o "$MOUNTOPTIONS"} "$DEVICE" "$MOUNTPOINT" |
299eae76 ER |
177 | if [ $? -ne 0 ]; then |
178 | echo >&2 "$PROGRAM: error mounting $DEVICE" | |
179 | fi |