blob: 8f28f3b9da50a3fa338e2f12a3916092d9cc6c69 (
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
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
|
## live-initramfs helper functions, used by live-initramfs on boot and by live-snapshot
if [ "${BUILD_SYSTEM}" = "Ubuntu" ]; then
MP_QUIET="-Q"
elif [ "${BUILD_SYSTEM}" = "Debian" ]; then
MP_QUIET="-q"
else
MP_QUIET=""
fi
if [ ! -x "/bin/fstype" ]; then
# klibc not in path -> not in initramfs
export PATH="${PATH}:/usr/lib/klibc/bin"
fi
sys2dev() {
sysdev=${1#/sys}
echo "/dev/$(udevinfo -q name -p ${sysdev} 2>/dev/null|| echo ${sysdev##*/})"
}
subdevices() {
sysblock=$1
r=""
for dev in "${sysblock}" "${sysblock}"/*; do
if [ -e "${dev}/dev" ]; then
r="${r} ${dev}"
fi
done
echo ${r}
}
get_fstype() {
local FSTYPE
local FSSIZE
eval $(fstype < $1)
if [ "$FSTYPE" != "unknown" ]; then
echo $FSTYPE
return 0
fi
/lib/udev/vol_id -t $1 2>/dev/null
}
where_is_mounted() {
device=$1
if grep -q "^$device " /proc/mounts; then
grep "^$device " /proc/mounts | read d mountpoint rest
echo $mountpoint
return 0
fi
return 1
}
lastline() {
while read lines ; do
line=${lines}
done
echo "${line}"
}
base_path ()
{
testpath="${1}"
mounts="$(awk '{print $2}' /proc/mounts)"
testpath="$(busybox realpath ${testpath})"
while true ; do
if echo "${mounts}" | grep -qs "^${testpath}" ; then
set -- `echo "${mounts}" | grep "^${testpath}" | lastline`
echo ${1}
break
else
testpath=`dirname $testpath`
fi
done
}
fs_size ()
{
# Returns used/free fs kbytes + 5% more
# You could pass a block device as $1 or the mount point as $2
dev="${1}"
mountp="${2}"
used="${3}"
if [ -z "${mountp}" ]; then
mountp=$(where_is_mounted "${dev}")
if [ "$?" -gt 0 ]; then
mountp="/mnt/tmp_fs_size"
mkdir -p "${mountp}"
mount -t $(get_fstype "${dev}") -o ro "${dev}" "${mountp}"
doumount=1
fi
fi
if [ "${used}" = "used" ]; then
size=$(du -ks ${mountp} | cut -f1)
size=$(expr ${size} + ${size} / 20 ) # FIXME: 5% more to be sure
else
# free space
size="$(df -k | grep -s ${mountp} | awk '{print $4}')"
fi
if [ -n "${doumount}" ]; then
umount "${mountp}"
rmdir "${mountp}"
fi
echo "${size}"
}
load_keymap()
{
# Load custom keymap
if [ -x /bin/loadkeys -a -r /etc/boottime.kmap.gz ]; then
loadkeys /etc/boottime.kmap.gz
fi
}
setup_loop() {
local fspath=$1
local module=$2
local pattern=$3
local offset=$4
local encryption=$5
modprobe ${MP_QUIET} -b "$module"
udevsettle
for loopdev in $pattern; do
if [ "$(cat $loopdev/size)" -eq 0 ]; then
dev=$(sys2dev "${loopdev}")
options=''
if [ 0 -lt "${offset}" ]; then
options="${options} -o ${offset}"
fi
if [ -z "${encryption}" ]; then
losetup ${options} "${dev}" "${fspath}"
else
# Loop AES encryption
while true; do
load_keymap
echo -n "Enter passphrase for ${fspath}: " >&6
read -s passphrase
echo "${passphrase}" > /tmp/passphrase
exec 9</tmp/passphrase
/sbin/losetup ${options} -e "${encryption}" -p 9 "${dev}" "${fspath}"
error=$?
exec 9<&-
rm -f /tmp/passphrase
if [ 0 -eq ${error} ]; then
unset error
break
fi
echo -n "Something went wrong... Retry? [YES/no] " >&6
read answer
if [ 'no' = "${answer}" ]; then
unset answer
break
fi
done
fi
echo "$dev"
return 0
fi
done
panic "No loop devices available"
}
try_mount ()
{
dev="${1}"
mountp="${2}"
opts="${3}"
if where_is_mounted ${dev} > /dev/null; then
mount -o remount,"${opts}" ${dev} $(where_is_mounted ${dev}) || panic "Remounting failed"
mount -o bind $(where_is_mounted ${dev}) ${mountp} || panic "Cannot bind-mount"
else
mount -t $(get_fstype "${dev}") -o "${opts}" "${dev}" "${mountp}" || panic "Cannot mount ${dev} on ${mountp}"
fi
}
find_cow_device() {
pers_label="${1}"
cow_backing="/${pers_label}-backing"
for sysblock in $(echo /sys/block/* | tr ' ' '\n' | grep -v loop); do
for dev in $(subdevices "${sysblock}"); do
devname=$(sys2dev "${dev}")
if [ "$(/lib/udev/vol_id -l $devname 2>/dev/null)" = "${pers_label}" ]; then
echo "$devname"
return
elif [ "$(get_fstype ${devname})" = "vfat" ]; then # FIXME: all supported block devices should be scanned
mkdir -p "${cow_backing}"
try_mount "${devname}" "${cow_backing}" "rw"
if [ -e "${cow_backing}/${pers_label}" ]; then
echo $(setup_loop "${cow_backing}/${pers_label}" "loop" "/sys/block/loop*")
return 0
else
umount ${cow_backing}
fi
fi
done
done
}
find_files()
# return the first of $filenames found on vfat and ext2/ext3 devices
# FIXME: merge with above function
{
filenames="${1}"
snap_backing="/snap-backing"
for sysblock in $(echo /sys/block/* | tr ' ' '\n' | grep -v loop); do
for dev in $(subdevices "${sysblock}"); do
devname=$(sys2dev "${dev}")
devfstype="$(get_fstype ${devname})"
if [ "${devfstype}" = "vfat" ] || [ "${devfstype}" = "ext2" ] || [ "${devfstype}" = "ext3" ]; then # FIXME: all supported block devices should be scanned
mkdir -p "${snap_backing}"
try_mount "${devname}" "${snap_backing}" "ro"
for filename in ${filenames}; do
if [ -e "${snap_backing}/${filename}" ]; then
echo "${devname} ${snap_backing} ${filename}"
return 0
fi
done
umount ${snap_backing}
fi
done
done
}
|
