slitaz-boot-scripts view init @ rev 371

init: use busybox mount
author Pascal Bellard <pascal.bellard@slitaz.org>
date Tue Jun 10 10:33:58 2014 +0200 (2014-06-10)
parents 9019e55a67d8
children 3b5dd12d6e46
line source
1 #!/bin/sh
2
3 ### cached kernel parameters :
4 #
5 # modprobe=
6 # list of modules to load, example modprobe=r8169,btrfs
7 #
8 ### Frugal mode or live CD : using a root ram disk.
9 #
10 # tmpram= [RAMDISK]
11 # minimum % of free RAM to build the root tmpfs, default 100
12 # a lower value may work, such as 50
13 # rootfssize= [RAMDISK]
14 # size of / regarding the RAM size, default 90%
15 #
16 ### Indirect mode ; an initramfs is used to mount root from the hard disk.
17 ### Any rootfs should fit, minimum required is slitaz-base.
18 #
19 # mount= [MOUNT]
20 # device with root loop file or sub directory
21 # posixovl [MOUNT]
22 # use posix attributes on a non posix filesystem (VFAT, NTFS...)
23 # loopfs= [MOUNT]
24 # loop file for root filesystem
25 # subroot= [MOUNT]
26 # sub directory for root filesystem
27 # bindfs= [MOUNT] (deprecated)
28 # bind out of root tree part
29 #
30 ### Special disk mode ; needs extra modules/softwares from preinit flavor.
31 #
32 # dmraid= [RAID]
33 # root semi hardware raid device name in /dev/mapper
34 # softraid= [RAID]
35 # root software device name in /dev/mapper
36 # lvmroot= [LVM]
37 # root logical volume name in /dev/mapper
38 # cryptoroot= [CRYPTO]
39 # encrypted root device using luks or loop-aes
40 #
41 ### Special mode used by loram flavor with aufs & squashfs
42 ### incremental/nested rootfs (russian dolls).
43 #
44 # rodev= [LORAM][MERGE]
45 # device (+ optional path) for the read only aufs branch
46 # rwdev= [LORAM][MERGE]
47 # (persistent) device for the r/w aufs branch instead of the ramfs
48 # isofs [LORAM]
49 # do not use squashfs filesystem images, but the cdrom filesystem only
50
51 fail()
52 {
53 echo -e '\033[70G[ \033[1;3'${1:-1mFailed}'\033[0;39m ]'
54 }
55
56 mnt()
57 {
58 busybox mount $@
59 }
60
61 umnt()
62 {
63 busybox umount $@
64 }
65
66 quit()
67 {
68 [ -d /mnt$4/etc ] || return
69 [ -n "$4" ] || mnt /mnt -o remount,ro
70 mnt --move /run /mnt/${1:-run}
71 cat>/run/init<<EOT
72 $2
73 x=/sbin/switch_root
74 [ -x \$x ] && exec \$x mnt $3 /sbin/init
75 EOT
76 fail 2mDone
77 exit
78 }
79
80 arg()
81 {
82 grep -q $1 /proc/cmdline
83 }
84
85 got()
86 {
87 arg $1= && root="$(sed "s/.*$1=\([^ ]*\).*/\1/" </proc/cmdline)"
88 }
89
90 msg()
91 {
92 echo "Switching / to $1..."
93 }
94
95 use()
96 {
97 got $1 && msg "$1 $root"
98 }
99
100 mnt()
101 {
102 r=$(blkid 2> /dev/null | sed "s/\"//g;/$root/!d;s/:.*//;q")
103 r={r:-$root}
104 r=${r#/dev/}
105 r=/dev/${r%%/*}
106 d=${root#*$r}
107 mnt $r $1 && return
108 w=$(cat /sys/module/usb_storage/parameters/delay_use)
109 w=$((1+${w:-2}))
110 echo -n "Sleep $w seconds..."
111 sleep $w
112 mnt $r $1
113 }
114
115 mod()
116 {
117 for i in $@
118 do echo "Loading module: $i"
119 modprobe $i 2>/dev/null ||
120 busybox insmod $(find /lib/modules|sed "/$i.ko/!dq")
121 done
122 }
123
124 try()
125 {
126 if [ ! -d /mnt/etc ] && got cryptoroot
127 then mod dm-mod dm-crypt aes-256
128 d=${root#/dev/}
129 l=crypto-$d
130 if cryptsetup isLuks $root 2>/dev/null; then
131 cryptsetup luksOpen $root $l
132 else
133 read -st 60 -p "Pass phrase : " p
134 k=$(echo $p|hashalot -x -n 32 sha512)
135 echo 0 $(cat $(find /sys/block|grep /$d/size))\
136 crypt aes-plain $k 0 $root 0|dmsetup create $l
137 fi
138 mnt /dev/mapper/$l /mnt
139 fi
140 got subroot && return
141 got loopfs && return
142 if [ -d /mnt/etc ]
143 then for i in $@; do cp -a $i /mnt$(dirname $i); done
144 quit
145 fi
146 fail
147 }
148
149 lvm()
150 {
151 use lvmroot || return
152 mod dm-mod
153 vgscan --ignorelockingfailure
154 vgchange -ay --ignorelockingfailure
155 mnt /dev/mapper/$root /mnt
156 try /dev/mapper $1
157 }
158
159 ldraid()
160 {
161 while read l
162 do case "$l" in
163 *raid10*) mod raid10;;
164 *raid0*) mod raid0;;
165 *raid1*) mod raid1;;
166 *raid*) mod raid456;;
167 *mirror*) mod dm-mirror
168 esac
169 done
170 }
171
172 if [ "$1" != "log" ]
173 then mnt -t proc proc /proc
174 mnt -t sysfs sys /sys
175 mnt -t tmpfs tmpfs /run
176 x=/sbin/init; echo "[ -x $x ] && exec $x" >/run/init
177 $0 log 2>&1 | tee /run/boot.log
178 umnt /proc
179 umnt /sys
180 . /run/init
181 sh
182 fi
183 got modprobe && mod ${root//,/ }
184 ln -s $(sed '/name/!ds/.*:[^a-z]*//' /proc/sys/dev/cdrom/info) /dev/cdrom
185 if use dmraid
186 then dmraid -s|sed '/^type/!ds/.*: *//'|ldraid
187 [ ${root:0:4} = /dev ] ||
188 root=/dev/mapper/$(dmraid -s|sed '/^name/!ds/.*: *//')p${root#p}
189 dmraid -ay
190 fi
191 if use softraid
192 then mdadm -E -s -c partitions>/etc/mdadm.conf
193 grep -qs " $root " /etc/mdadm.conf ||
194 root=$(awk '/dev.md/{print $2;exit}'</etc/mdadm.conf)
195 grep level=raid /etc/mdadm.conf|ldraid
196 for i in 1 2 3 4 5 6 7 8 9
197 do sleep $i
198 mdadm -A -s
199 grep -qs ': act' /proc/mdstat && break
200 done
201 lvm /etc/mdadm.conf
202 fi
203 lvm
204 if got mount
205 then dev=$root
206 x=$(blkid|grep $dev|sed 's/:.*//;q')
207 root=${x:-$dev}
208 [ "$dev" = "$root" ] || dev="$root ($dev)"
209 echo "Mount $dev..."
210 mnt /mnt
211 arg posixovl && echo "And posixovl..." &&
212 mount.posixovl -F /mnt -- -oallow_other -odefault_permissions -osuid
213 fi
214 got loopfs && echo "Into file $root..." &&
215 losetup /dev/loop0 /mnt/$root && mnt /dev/loop0 /mnt
216 got bindfs && echo "Bind ${root/,/ to }..." &&
217 mnt --bind /mnt/${root%,*} /mnt/${root/,//}
218 arg cryptoroot= && try
219 if use subroot
220 then cp $(LD_TRACE_LOADED_OBJECTS=1 /lib/ld*.so /usr/sbin/chroot | sed\
221 's|.*=> \(/lib/l[^ ]*\).*|\1|;/^\//!d') /usr/sbin/chroot /run
222 r=$root/run
223 quit $r "export LD_LIBRARY_PATH=$r:/lib"\
224 "$root$(ls /run/ld-*so) $r/chroot $root" "/$root"
225 fi
226 quit
227 msg tmpfs
228 root=100
229 got tmpram
230 r=$root
231 root=90%
232 got rootfssize
233 [ $(busybox free|busybox awk '/Mem:/{print int(($4*100)/$3)}') -ge $r ] &&
234 mnt -t tmpfs -o size=$root tmpfs /mnt &&
235 for i in $(ls -ar /)
236 do case "$i" in
237 .*|cdrom) ;;
238 mnt|proc|sys) mkdir /mnt/$i;;
239 usr|var|rootfs*) mv /$i /mnt;;
240 *) cp -a /$i /mnt 2>/dev/null && continue
241 fail
242 umnt /mnt
243 exit
244 esac
245 done || fail 3mSkipped
246 quit
247 mod squashfs 2>/dev/null || exit
248 msg aufs
249 br=/mnt/.rw
250 mkdir $br
251 got rwdev && mnt $br && br=$br$d
252 o=
253 p=
254 c=/mnt/.cdrom
255 if [ -z "$(ls /mnt/rootfs* 2>/dev/null)" ]
256 then root=/dev/cdrom/fs
257 got rodev
258 mkdir -p $c /mnt$c /mnt/.rw$c
259 mnt $c
260 o="-o 124"
261 p=/.cdrom/boot
262 c=$c$d
263 fi
264 l=0
265 r=
266 got isofs || for i in /mnt$p/rootfs?*.gz
267 do fs=${i#*root}
268 r=$r:/mnt/.$fs
269 mkdir -p /mnt/.rw/mnt/.$fs /mnt/.$fs
270 losetup $o /dev/loop$l $i
271 mnt -o ro -t squashfs /dev/loop$((l++)) /mnt/.$fs
272 done
273 mod aufs
274 mnt -t aufs -o br=$br${r:-:$c} none /mnt
275 quit