slitaz-boot-scripts view init @ rev 472

init: mount 'SliTaz persistent /home' partition
author Pascal Bellard <pascal.bellard@slitaz.org>
date Mon Jan 10 14:11:26 2022 +0000 (2022-01-10)
parents 442c9f81919d
children 9a679d8916b6
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 # rootfsinodes= [RAMDISK]
16 # files count of / regarding the RAM size
17 #
18 ### Indirect mode ; an initramfs is used to mount root from the hard disk.
19 ### Any rootfs should fit, minimum required is slitaz-base.
20 #
21 # mount= [MOUNT]
22 # device with root loop file or sub directory
23 # posixovl [MOUNT]
24 # use posix attributes on a non posix filesystem (VFAT, NTFS...)
25 # loopfs= [MOUNT]
26 # loop file for root filesystem
27 # subroot= [MOUNT]
28 # sub directory for root filesystem
29 # bindfs= [MOUNT] (deprecated)
30 # bind out of root tree part
31 #
32 # extra= [MOUNT]
33 # extra initrd files list to load
34 #
35 ### Special disk mode ; needs extra modules/softwares from preinit flavor.
36 #
37 # dmraid= [RAID]
38 # root semi hardware raid device name in /dev/mapper
39 # softraid= [RAID]
40 # root software device name in /dev/mapper
41 # lvmroot= [LVM]
42 # root logical volume name in /dev/mapper
43 # cryptoroot= [CRYPTO]
44 # encrypted root device using luks or loop-aes
45 #
46 ### Special mode used by loram flavor with aufs/overlayfs & squashfs
47 ### incremental/nested rootfs (russian dolls).
48 #
49 # rodev= [LORAM][MERGE]
50 # device (+ optional path) for the read only aufs branch
51 # rwdev= [LORAM][MERGE]
52 # (persistent) device for the r/w aufs branch instead of the ramfs
53 # isofs [LORAM]
54 # do not use squashfs filesystem images, but the cdrom filesystem only
55
56
57 fail() {
58 echo -e '\033[70G[ \033[1;3'${1:-1mFailed}'\033[0;39m ]'
59 }
60
61
62 quit() {
63 [ -d /mnt$4/etc ] || return
64 grep -q serial /proc/ioports && ! grep -q ttyS /mnt$4/etc/inittab &&
65 echo "ttyS0::respawn:/sbin/getty 115200,38400,9600,4800,2400 ttyS0" \
66 >> /mnt$4/etc/inittab
67 [ -n "$4" ] || grep -q 'tmpfs /mnt tmpfs' /proc/mounts ||
68 busybox mount /mnt -o remount,ro
69 busybox mount --move /run /mnt/${1:-run}
70 cat > /run/init <<EOT
71 $2
72 x=/sbin/switch_root
73 [ -x \$x ] && exec \$x mnt $3 /sbin/init
74 EOT
75 fail 2mDone
76 exit
77 }
78
79
80 arg() {
81 grep -q $1 /proc/cmdline
82 }
83
84
85 got() {
86 arg $1= && root="$(sed "s/.*$1=\\([^ ]*\\).*/\\1/" </proc/cmdline)"
87 }
88
89
90 msg() {
91 echo "Switching / to $1..."
92 }
93
94
95 use() {
96 got $1 && msg "$1 $root"
97 }
98
99
100 bbmnt() {
101 r=$(busybox blkid 2> /dev/null | grep "$root[:\"]" | sed 's|:.*||;q')
102 r=${r:-$(busybox blkid $root 2> /dev/null | sed 's|:.*||;q')}
103 r=${r:-$root}
104 if [ ! -b $r ]; then
105 r=${r#/dev/}
106 r=/dev/${r%%/*}
107 fi
108 d=${root#*$r}
109 t=$(busybox blkid $r 2> /dev/null | sed '/ TYPE=/!d;s/.* TYPE="//;s/".*//')
110 busybox mount $r $1 ${t:+-t $t}
111 }
112
113
114 mnt() {
115 bbmnt $1 && return
116 w=$(cat /sys/module/usb_storage/parameters/delay_use)
117 w=$((1+${w:-2}))
118 echo "Sleep $w seconds..."
119 sleep $w
120 bbmnt $1
121 }
122
123
124 mod() {
125 for i in $@; do
126 grep -q "^$i\\W" /proc/modules && continue
127 grep -q "\\W$i\$" /proc/filesystems && continue
128 echo "Loading module: $i"
129 modprobe $i 2>/dev/null ||
130 for j in $(find /lib/modules /mnt/.fs*/lib/modules|sed "/\/$i.ko/!d" 2> /dev/null); do
131 busybox insmod $j && break
132 done
133 done
134 }
135
136
137 try() {
138 if [ ! -d /mnt/etc ] && got cryptoroot; then
139 mod dm-mod dm-crypt aes-256
140 d=${root#/dev/}
141 l=crypto-$d
142 if cryptsetup isLuks $root 2>/dev/null; then
143 cryptsetup luksOpen $root $l
144 else
145 read -st 60 -p "Pass phrase : " p
146 k=$(echo $p|hashalot -x -n 32 sha512)
147 echo 0 $(cat $(find /sys/block|grep /$d/size))\
148 crypt aes-plain $k 0 $root 0|dmsetup create $l
149 fi
150 busybox mount /dev/mapper/$l /mnt
151 fi
152 got subroot && return
153 got loopfs && return
154 if [ -d /mnt/etc ]; then
155 for i in $@; do
156 cp -a $i /mnt$(dirname $i)
157 done
158 quit
159 fi
160 fail
161 }
162
163
164 lvm() {
165 use lvmroot || return
166 mod dm-mod
167 vgscan --ignorelockingfailure
168 vgchange -ay --ignorelockingfailure
169 busybox mount /dev/mapper/$root /mnt
170 try /dev/mapper $1
171 }
172
173
174 ldraid() {
175 while read l; do
176 case "$l" in
177 *raid10*) mod raid10;;
178 *raid0*) mod raid0;;
179 *raid1*) mod raid1;;
180 *raid*) mod raid456;;
181 *mirror*) mod dm-mirror;;
182 esac
183 done
184 }
185
186
187 mntiso() {
188 umnt=
189 if got mount; then
190 dev=$root
191 x=$(busybox blkid|grep $dev|sed 's/:.*//;q')
192 root=${x:-$dev}
193 [ "$dev" = "$root" ] || dev="$root ($dev)"
194 echo "Mount $dev..."
195 mnt $1
196 umnt=" $umnt $1"
197 arg posixovl && echo "And posixovl..." && umnt=" $umnt $1" &&
198 mount.posixovl -F $1 -- -oallow_other -odefault_permissions -osuid
199 fi
200 got loopfs && echo "Into file $root..." && umnt=" $umnt $1" &&
201 losetup /dev/loop0 $1/$root && root=/dev/loop0 && mnt $1
202 [ -z "$umnt" ] && mnt $1
203 got bindfs && echo "Bind ${root/,/ to }..." &&
204 busybox mount --bind $1/${root%,*} $1/${root/,//}
205 true
206 }
207
208
209
210 if [ "$1" != 'log' ]; then
211 busybox mount -t proc proc /proc
212 busybox mount -t sysfs sys /sys
213 busybox mount -t tmpfs tmpfs /run
214 x=/sbin/init; echo "[ -x $x ] && exec $x" >/run/init
215 $0 log 2>&1 | tee /run/boot.log
216 busybox umount /sys
217 busybox umount /proc
218 . /run/init
219 sh
220 fi
221
222 mdev -s 2> /dev/null ||
223 for i in /sys/block/*/dev /sys/block/*/*/dev ; do
224 [ -s "$i" ] || continue
225 n=${i%/dev}
226 n=/dev/${n##*/}
227 [ -e $n ] && continue
228 echo "Create $n "
229 mknod $n b $(sed 's/:/ /' < $i)
230 done
231
232 got modprobe && mod ${root//,/ }
233
234 [ -d /proc/sys/dev/cdrom ] &&
235 ln -s $(sed '/name/!d;s/.*:[^a-z]*//' /proc/sys/dev/cdrom/info) /dev/cdrom
236
237 dev=$(busybox fdisk -l|awk '/sectors/{d=$2}/SliTaz persistent \/home/{print d $1;quit}'|sed 's|:||')
238 if got root && [ "$dev" -a "$root" == "/dev/null" ]; then
239 busybox blkid $dev | grep -q TYPE= || mkfs.vfat $dev
240 mount $dev /home && case $(busybox blkid $dev) in
241 *vfat*|*exfat*|*ntfs*)
242 mount.posixovl -F /home -- -oallow_other -odefault_permissions -osuid
243 esac
244 fs=/home/boot/rootfs.gz; [ -s $fs ] && (zcat $fs || unlzma < $fs || cat $fs) | cpio -idmu
245 [ -d /init.d ] && for i in /init.d/* ; do [ -x $i ] && . $i ; done
246 fi 2>&1 >/dev/null
247
248 if use dmraid; then
249 dmraid -s | sed '/^type/!ds/.*: *//' | ldraid
250 [ ${root:0:4} = /dev ] ||
251 root=/dev/mapper/$(dmraid -s|sed '/^name/!ds/.*: *//')p${root#p}
252 dmraid -ay
253 fi
254 use raiddev && raiddev="DEVICE ${root//,/ }"
255 use raidmail && raidmail="MAILADDR $root"
256 if use softraid; then
257 for i in 1 2 3 4 5 6 7 8 9; do
258 mdadm -E -s -c partitions > /etc/mdadm.conf
259 grep -qs " $root " /etc/mdadm.conf && break
260 sleep $i
261 done
262 [ "$raiddev" ] && echo "$raiddev" >> /etc/mdadm.conf
263 [ "$raidmail" ] && echo "$raidmail" >> /etc/mdadm.conf
264 grep level=raid /etc/mdadm.conf | ldraid
265 udevd --daemon
266 udevadm trigger
267 udevadm settle
268 for i in 1 2 3 4 5 6 7 8 9; do
269 sleep $i
270 mdadm -A -s
271 for j in $(sed '/\/md/!d;s|.*md/*\([0-9]*\).*|md\1|' \
272 /etc/mdadm.conf); do
273 grep -qs "$j : act" /proc/mdstat || continue 2
274 done
275 break
276 done
277 grep -qs "^$(basename $root) : act" /proc/mdstat ||
278 root=$(awk '/^md/ { print "/dev/" $1; exit }' < /proc/mdstat)
279 lvm /etc/mdadm.conf
280 fi
281 lvm
282
283 got extra && extra=$root && mntiso /mnt && for i in ${extra//,/ }; do
284 grep -q ' lm ' /proc/cpuinfo && [ -s /mnt/${i}64 ] && i=${i}64
285 (unlzma < /mnt/$i 2>/dev/null || zcat /mnt/$i 2>/dev/null || cat /mnt/$i) | cpio -idmu
286 done && for i in $umnt; do umount -l $i; done
287 arg cryptoroot= && try
288 if use subroot; then
289 cp $(LD_TRACE_LOADED_OBJECTS=1 /lib/ld*.so /usr/sbin/chroot | sed\
290 's|.*=> \(/lib/l[^ ]*\).*|\1|;/^\//!d') /usr/sbin/chroot /run
291 r=$root/run
292 quit $r "export LD_LIBRARY_PATH=$r:/lib"\
293 "$root$(ls /run/ld-*so) $r/chroot $root" "/$root"
294 fi
295 quit
296 msg tmpfs
297 root=100
298 got tmpram
299 r=$root
300 got rootfsinodes && inodes=",nr_inodes=$root"
301 root=90%
302 got rootfssize
303 [ $(busybox free|busybox awk '/Mem:/{print int(($4*100)/$3)}') -ge $r ] &&
304 busybox mount -t tmpfs -o size=$root$inodes tmpfs /mnt &&
305 export PATH=/mnt/bin:$PATH &&
306 for i in $(ls -a /); do
307 case "$i" in
308 .*|cdrom) ;;
309 mnt|proc|run|sys) mkdir /mnt/$i;;
310 dev) cp -a /$i /mnt;;
311 *) mv /$i /mnt; ln -s /mnt/$i / 2> /dev/null ||
312 LD_LIBRARY_PATH=/mnt/lib:/mnt/usr/lib:/lib:/usr/lib \
313 /mnt/lib/ld-linux.so.2 /mnt/bin/ln -s /mnt/$i /;;
314 esac
315 done || fail 3mSkipped
316 quit
317 mod squashfs 2>/dev/null || exit
318 msg aufs
319 br=/mnt/.rw
320 mkdir $br /mnt/.wd
321 got rwdev && mnt $br && br=$br$d
322 o=
323 p=
324 c=/mnt/.cdrom
325 if [ -z "$(ls /mnt/rootfs* 2>/dev/null)" ]; then
326 root=/dev/cdrom/fs
327 got rodev
328 mkdir -p $c /mnt$c /mnt/.rw$c
329 mntiso $c
330 o="-o 124"
331 p=/.cdrom/boot
332 c=$c$d
333 fi
334 l=0
335 r=
336 got isofs && r=:$c || for i in /mnt$p/rootfs?*.gz; do
337 fs=${i#*root}
338 r=$r:/mnt/.$fs
339 mkdir -p /mnt/.rw/mnt/.$fs /mnt/.$fs
340 losetup $o /dev/loop$((++l)) $i
341 busybox mount -o ro -t squashfs /dev/loop$l /mnt/.$fs
342 done
343 while read type opt; do
344 mod $type || continue
345 busybox mount -t $type -o $opt none /mnt && break
346 done <<EOT
347 aufs br=$br$r
348 overlayfs workdir=/mnt/.wd${r/:/,lowerdir=},upperdir=$br
349 EOT
350 quit