slitaz-boot-scripts view init @ rev 287
init/subroot: may use disk busybox-static
| author | Pascal Bellard <pascal.bellard@slitaz.org> |
|---|---|
| date | Wed Mar 21 13:28:35 2012 +0100 (2012-03-21) |
| parents | 11f87b20a969 |
| children | 1c4fd91d1db5 |
line source
1 #!/bin/sh
3 success()
4 {
5 cat > /dev/shm/init
6 [ -d /proc/sys ] && umount /proc
7 echo -e "\\033[70G[ \\033[1;32mOK\\033[0;39m ]"
8 exit
9 }
11 launch_init()
12 {
13 mount --move /dev/pts /mnt/dev/pts
14 mount --move /dev/shm /mnt/dev/shm
15 success <<EOT
16 exec /sbin/switch_root mnt /sbin/init
17 EOT
18 }
20 failed()
21 {
22 umount /proc
23 echo -e "\\033[70G[ \\033[1;31mFailed\\033[0;39m ]"
24 }
26 try_init()
27 {
28 if [ ! -d /mnt/etc ] && grep -q cryptoroot= /proc/cmdline; then
29 modprobe dm-mod
30 modprobe dm-crypt
31 modprobe aes-i586
32 root="$(sed 's/.*cryptoroot=\([^ ]*\).*/\1/' < /proc/cmdline)"
33 dev=${root#/dev/}
34 dmlabel=crypto-$dev
35 if cryptsetup isLuks $root 2> /dev/null; then
36 cryptsetup luksOpen $root $dmlabel
37 else
38 read -s -t 60 -p "Pass phrase : " passphrase
39 key=$(echo $passphrase | hashalot -x -n 32 sha512)
40 blocks=$(cat $(find /sys/block | grep /$dev/size))
41 echo 0 $blocks crypt aes-plain $key 0 $root 0 | \
42 dmsetup create $dmlabel
43 fi
44 mount /dev/mapper/$dmlabel /mnt
45 fi
46 grep -q subroot= /proc/cmdline && return
47 grep -q loopfs= /proc/cmdline && return
48 if [ -d /mnt/etc ]; then
49 umount /sys
50 [ -n "$1" ] && for i in $@ ; do
51 cp -a $i /mnt$(dirname $i)
52 done
53 mount /mnt -o remount,ro
54 launch_init
55 fi
56 failed
57 }
59 mount_mapper()
60 {
61 mount $root /mnt
62 try_init /dev/mapper $@
63 }
65 lvmsetup()
66 {
67 grep -q lvmroot= /proc/cmdline || return 1
68 modprobe dm-mod
69 vgscan --ignorelockingfailure
70 vgchange -ay --ignorelockingfailure
71 root="/dev/mapper/$(sed 's/.*lvmroot=\([^ ]*\).*/\1/' < /proc/cmdline)"
72 return 0
73 }
75 load_raid()
76 {
77 while read line; do
78 case "$line" in
79 *raid10*) modprobe raid10 ;;
80 *raid0*) modprobe raid0 ;;
81 *raid1*) modprobe raid1 ;;
82 *raid[456]*) modprobe raid456 ;;
83 esac
84 done
85 }
87 if [ "$1" != "logged" ]; then
88 mount -t devpts devpts /dev/pts
89 mount -t tmpfs tmpfs /dev/shm
90 script -qc '/init logged' /dev/shm/boot.log
91 . /dev/shm/init
92 else
93 mount -t proc proc /proc
94 mount -t sysfs sysfs /sys
95 if grep -q dmraid= /proc/cmdline; then
96 root="$(sed 's/.*dmraid=\([^ ]*\).*/\1/' < /proc/cmdline)"
97 echo -n "Switching / to dmraid $root..."
98 dmraid -s | grep ^type | awk '{ print $3 }' | load_raid
99 case "$root" in
100 /dev/*);;
101 *) root=/dev/mapper/$(dmraid -s|grep ^name|awk '{print $3}')p${root#p};;
102 esac
103 dmraid -ay
104 lvmsetup
105 mount_mapper
106 fi
107 if grep -q softraid= /proc/cmdline; then
108 root="$(sed 's/.*softraid=\([^ ]*\).*/\1/' < /proc/cmdline)"
109 echo -n "Switching / to softraid $root..."
110 mdadm --examine --scan --config=partitions > /etc/mdadm.conf
111 grep -qs " $root " /etc/mdadm.conf ||
112 root=$(awk '/dev.md/ { print $2; exit }' < /etc/mdadm.conf)
113 grep level=raid /etc/mdadm.conf | load_raid
114 for i in 1 2 3 4 5 6 7 8 9; do
115 sleep $i
116 mdadm --assemble --scan
117 grep -qs ': active' /proc/mdstat && break
118 done
119 lvmsetup
120 mount_mapper /etc/mdadm.conf
121 fi
122 if lvmsetup; then
123 echo -n "Switching / to lvm $root..."
124 mount_mapper
125 fi
126 if grep -q mount= /proc/cmdline; then
127 root="$(sed 's/.*mount=\([^ ]*\).*/\1/' < /proc/cmdline)"
128 dev=$(blkid | grep $root | sed 's/:.*//;q')
129 echo "Mounting $dev ($root) ..."
130 if ! mount $dev /mnt; then
131 if echo $dev | grep -q "/dev/sd"; then
132 delay=`cat /sys/module/usb_storage/parameters/delay_use`
133 delay=$((1+$delay))
134 echo -n "sleep for $delay seconds..."
135 sleep $delay
136 fi
137 mount $dev /mnt
138 fi
139 grep -q posixovl /proc/cmdline &&
140 echo "Mounting posixovl.." &&
141 mount.posixovl /mnt
142 fi
143 if grep -q loopfs= /proc/cmdline; then
144 loopfs="$(sed 's/.*loopfs=\([^ ]*\).*/\1/' < /proc/cmdline)"
145 echo "Into loop file $loopfs..."
146 losetup /dev/loop0 /mnt/$loopfs
147 mount /dev/loop0 /mnt 2> /dev/null
148 fi
149 if grep -q bindfs= /proc/cmdline; then
150 bind="$(sed 's/.*bindfs=\([^ ]*\).*/\1/' < /proc/cmdline)"
151 echo "Binding ${bind/,/ to } ..."
152 mount --bind /mnt/${bind%,*} /mnt/${bind%,*}/${bind#*,}
153 fi
154 grep -q cryptoroot= /proc/cmdline && try_init
155 umount /sys
156 if grep -q subroot= /proc/cmdline; then
157 subroot="/$(sed 's/.*subroot=\([^ ]*\).*/\1/' < /proc/cmdline)" &&
158 echo -n "Chrooting to $subroot..."
159 mount --move /dev/pts /mnt$subroot/dev/pts
160 shm=$subroot/dev/shm
161 mount --move /dev/shm /mnt$shm
162 bb="/usr/share/boot/busybox-static /mnt$shm 2> /dev/null"
163 if mv $bb || cp /mnt$subroot$bb ; then
164 success <<EOT
165 exec /sbin/switch_root mnt $shm/busybox-static chroot $subroot /sbin/init
166 EOT
167 else
168 success <<EOT
169 exec chroot /mnt$subroot /sbin/init
170 EOT
171 fi
172 fi
173 echo -n "Switching / to tmpfs"
174 size="$(grep rootfssize= < /proc/cmdline | \
175 sed 's/.*rootfssize=\([0-9]*[kmg%]\).*/-o size=\1/')"
176 free=$(busybox free | busybox awk '/Mem:/ { print int(($4*100)/$3) }')
177 umount /proc
178 [ -n "$size" ] || size="-o size=90%"
179 echo "exec /sbin/init" > /dev/shm/init
180 if [ $free -lt 50 ] || ! mount -t tmpfs $size tmpfs /mnt; then
181 echo -e "\\033[70G[ \\033[1;33mSkipped\\033[0;39m]"
182 exit
183 fi
184 for i in $(ls -ar /); do
185 case "$i" in
186 .|..) ;;
187 mnt) mkdir /mnt/mnt;;
188 usr|var) mv /$i /mnt ;;
189 *) if ! cp -a /$i /mnt 2> /dev/null; then
190 failed
191 umount /mnt
192 exit
193 fi;;
194 esac
195 done
196 launch_init
197 fi