blob: 2408a66c29959a30f794d63b7463b28586cd4c5d (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
|
#!/bin/sh
set -e
usage_exit()
{
echo
echo "usage: $0 src [--layer=tarball]... dest [dest]..."
echo
echo "example: copying image to devices: sde, sdf, sdg"
echo "$0 lx-trainer.img /dev/sde /dev/sdf /dev/sdg"
echo
exit 1
}
if [ `id -u` -ne 0 ]; then
echo "error: sorry, this script must be run as root"
exit 1
fi
# minimum 2 arguments
if [ $# -lt 2 ]; then
echo "error: invalid arguments"
usage_exit
fi
# gather arguments
SRC=""
LAYERS=""
DESTS=""
for arg in $@; do
case $arg in
--layer=*)
LAYERS="$LAYERS `echo $arg | sed -e 's/^--layer=//'`"
;;
--*)
echo "error: unknown option: $arg"
usage_exit
;;
*)
if [ -z "$SRC" ]; then
SRC="$arg"
else
DESTS="$DESTS $arg"
fi
;;
esac
done
# source must be file or block device
if [ ! -f "$SRC" -a ! -b "$SRC" ]; then
echo "error: invalid src"
usage_exit
fi
# destination must be block device
for dest in $DESTS; do
if [ ! -b $dest ]; then
echo "error: invalid dest: $dest"
usage_exit
fi
done
# delete mbr's and rescan devices
dd if=/dev/zero bs=1M count=10 | tee $DESTS > /dev/null
partprobe $DESTS
# efficiently copy source to all destinations and rescan devices
cat $SRC | tee $DESTS > /dev/null
partprobe $DESTS
# add 2nd partition
for dest in $DESTS; do
/bin/echo -e "n\np\n\n\n\nw" | fdisk $dest
done
# rescan devices
partprobe $DESTS
# wait for partitions to appear
for dest in $DESTS; do
while [ ! -b ${dest}2 ]; do
echo "waiting for ${dest}2..."
sleep 1
done
done
# create ext4 on 2nd partition
for dest in $DESTS; do
mkfs.ext4 -L lxhome ${dest}2 &
done
wait
# setup temp directory for mountpoints
TMP_ROOT="/tmp/dd-multi-`date +%s`.$$"
rm -rf $TMP_ROOT
mkdir -p $TMP_ROOT
echo "using temp directory $TMP_ROOT"
for dest in $DESTS; do
# create mountpoints
mkdir -p ${TMP_ROOT}${dest}1
mkdir -p ${TMP_ROOT}${dest}2
# mount partitions
mount ${dest}1 ${TMP_ROOT}${dest}1
mount ${dest}2 ${TMP_ROOT}${dest}2
# move home directories to 2nd partition
mv ${TMP_ROOT}${dest}1/home/* ${TMP_ROOT}${dest}2/
# setup 2nd partition to be mounted as /home
echo 'LABEL=lxhome /home ext4 defaults 0 0' | \
tee -a ${TMP_ROOT}${dest}1/etc/fstab
# copy layer tarballs to /home
for tarball in $LAYERS; do
destfile="${TMP_ROOT}${dest}2/`basename $tarball`"
if [ -f $destfile ]; then
echo
echo "WARNING: OVERWRITING $destfile" 1>&2
echo
sleep 1
fi
cp $tarball $destfile
done
# remount home to /home
umount ${TMP_ROOT}${dest}2
mount ${dest}2 ${TMP_ROOT}${dest}1/home
# unpack layers
for tarball in $LAYERS; do
destfile=`basename $tarball`
chroot ${TMP_ROOT}${dest}1 tar -x -f /home/$destfile --numeric-owner -C /
rm ${TMP_ROOT}${dest}1/home/$destfile
done
# unmount partitions
umount ${TMP_ROOT}${dest}1/home
umount ${TMP_ROOT}${dest}1
done
# cleanup temp directory
rm -rf $TMP_ROOT
|
