# HG changeset patch
# User Pascal Bellard <pascal.bellard@slitaz.org>
# Date 1345986593 -7200
# Node ID afd4941fd37696233da651f40da490b970963164
# Parent  b59d773e1de83405c9e0809c061be9722fb18282
init: add aufs support

diff -r b59d773e1de8 -r afd4941fd376 init
--- a/init	Sat Jul 07 17:59:30 2012 +0200
+++ b/init	Sun Aug 26 15:09:53 2012 +0200
@@ -1,192 +1,210 @@
 #!/bin/sh
 
-success()
+fail()
 {
-	cat > /run/init
-	[ -d /proc/sys ] && umount /proc
-	echo -e "\\033[70G[ \\033[1;32mOK\\033[0;39m ]"
-	exit
+echo -e '\033[70G[ \033[1;3'${1:-1mFailed}'\033[0;39m ]'
 }
 
-launch_init()
+quit()
 {
-	mount --move /run /mnt/run
-	success <<EOT
-exec /sbin/switch_root mnt /sbin/init
+[ -d /mnt$4/etc ] || return
+mount /mnt -o remount,ro
+mount --move /run /mnt/${1:-run}
+cat>/run/init<<EOT
+$2
+x=/sbin/switch_root
+[ -x \$x ] && exec \$x mnt $3 /sbin/init
 EOT
+fail 2mDone
+exit
 }
 
-failed()
+arg()
 {
-	umount /proc
-	echo -e "\\033[70G[ \\033[1;31mFailed\\033[0;39m ]"
+grep -q $1 /proc/cmdline
 }
 
-try_init()
+got()
 {
-	if [ ! -d /mnt/etc ] && grep -q cryptoroot= /proc/cmdline; then
-		modprobe dm-mod
-		modprobe dm-crypt
-		modprobe aes-i586
-		root="$(sed 's/.*cryptoroot=\([^ ]*\).*/\1/' < /proc/cmdline)"
-		dev=${root#/dev/}
-		dmlabel=crypto-$dev
-		if cryptsetup isLuks $root 2> /dev/null; then
-			cryptsetup luksOpen $root $dmlabel
-		else
-			read -s -t 60 -p "Pass phrase : " passphrase
-			key=$(echo $passphrase | hashalot -x -n 32 sha512)
-			blocks=$(cat $(find /sys/block | grep /$dev/size))
-			echo 0 $blocks crypt aes-plain $key 0 $root 0 | \
-				dmsetup create $dmlabel
-		fi
-		mount /dev/mapper/$dmlabel /mnt
-	fi
-	grep -q subroot= /proc/cmdline && return
-	grep -q loopfs= /proc/cmdline && return
-	if [ -d /mnt/etc ]; then
-		umount /sys
-		[ -n "$1" ] && for i in $@ ; do
-			cp -a $i /mnt$(dirname $i)
-		done
-		mount /mnt -o remount,ro
-		launch_init
-	fi
-	failed
+arg $1= && root="$(sed "s/.*$1=\([^ ]*\).*/\1/" </proc/cmdline)"
 }
 
-mount_mapper()
+msg()
 {
-	mount $root /mnt
-	try_init /dev/mapper $@
+echo "Switching / to $1 ..."
 }
 
-lvmsetup()
+use()
 {
-	grep -q lvmroot= /proc/cmdline || return 1
-	modprobe dm-mod
-	vgscan --ignorelockingfailure
-	vgchange -ay --ignorelockingfailure
-	root="/dev/mapper/$(sed 's/.*lvmroot=\([^ ]*\).*/\1/' < /proc/cmdline)"
-	return 0
+got $1 && echo msg "$1 $root"
 }
 
-load_raid()
+mnt()
 {
-while read line; do
-	case "$line" in
-	*raid10*)	modprobe raid10 ;;
-	*raid0*)	modprobe raid0 ;;
-	*raid1*)	modprobe raid1 ;;
-	*raid[456]*)	modprobe raid456 ;;
-	*mirror*)	modprobe dm-mirror ;;
-	esac
+r=${root#/dev/}
+r=/dev/${r%%/*}
+d=${root#*$r}
+mount $r $1 && return
+w=$(cat /sys/module/usb_storage/parameters/delay_use)
+w=$((1+${w:-2}))
+echo -n "Sleep $w seconds..."
+sleep $w
+mount $r $1
+}
+
+mod()
+{
+modprobe $1 2>/dev/null || insmod $(find /lib/modules|sed "/$1.ko/!dq") 
+}
+
+tryinit()
+{
+if [ ! -d /mnt/etc ] && got cryptoroot
+then	mod dm-mod
+	mod dm-crypt
+	mod aes-i586
+	d=${root#/dev/}
+	l=crypto-$d
+	if cryptsetup isLuks $root 2>/dev/null; then
+		cryptsetup luksOpen $root $l
+	else
+		read -st 60 -p "Pass phrase : " p
+		k=$(echo $p|hashalot -x -n 32 sha512)
+		echo 0 $(cat $(find /sys/block|grep /$d/size))\
+		crypt aes-plain $k 0 $root 0|dmsetup create $l
+	fi
+	mount /dev/mapper/$l /mnt
+fi
+got subroot && return
+got loopfs && return
+if [ -d /mnt/etc ]
+then	for i in $@; do cp -a $i /mnt$(dirname $i); done
+	quit
+fi
+fail
+}
+
+trylvm()
+{
+use lvmroot || return
+mod dm-mod
+vgscan --ignorelockingfailure
+vgchange -ay --ignorelockingfailure
+mount /dev/mapper/$root /mnt
+tryinit /dev/mapper $1
+}
+
+ldraid()
+{
+while read l
+do case "$l" in
+*raid10*)	mod raid10;;
+*raid0*)	mod raid0;;
+*raid1*)	mod raid1;;
+*raid*)		mod raid456;;
+*mirror*)	mod dm-mirror
+esac
 done
 }
 
-if [ "$1" != "logged" ]; then
+if [ "$1" != "log" ]
+then	mount -t proc proc /proc
+	mount -t sysfs sys /sys
 	mount -t tmpfs tmpfs /run
-	/init logged 2>&1 | tee /run/boot.log
+	x=/sbin/init; echo "[ -x $x ] && exec $x" >/run/init
+	$0 log 2>&1 | tee /run/boot.log
+	umount /proc
+	umount /sys
 	. /run/init
-else
-mount -t proc proc /proc
-mount -t sysfs sysfs /sys
-if grep -q dmraid= /proc/cmdline; then
-	root="$(sed 's/.*dmraid=\([^ ]*\).*/\1/' < /proc/cmdline)"
-	echo -n "Switching / to dmraid $root..."
-	dmraid -s | grep ^type | awk '{ print $3 }' | load_raid
-	case "$root" in
-	/dev/*);;
-	*) root=/dev/mapper/$(dmraid -s|grep ^name|awk '{print $3}')p${root#p};;
+	sh
+fi
+ln -s "$(sed '/name/!ds/.*:[^a-z]*//' /proc/sys/dev/cdrom/info)" /dev/cdrom
+if use dmraid
+then	dmraid -s|sed '/^type/!ds/.*: *//'|ldraid
+	[ ${root:0:4} = /dev ] ||
+	root=/dev/mapper/$(dmraid -s|sed '/^name/!ds/.*: *//')p${root#p}
+	dmraid -ay
+fi
+if use softraid
+then	mdadm -E -s -c partitions>/etc/mdadm.conf
+	grep -qs " $root " /etc/mdadm.conf ||
+	root=$(awk '/dev.md/{print $2;exit}'</etc/mdadm.conf)
+	grep level=raid /etc/mdadm.conf|ldraid
+	for i in 1 2 3 4 5 6 7 8 9
+	do	sleep $i
+		mdadm -A -s
+		grep -qs ': act' /proc/mdstat && break
+	done
+	trylvm /etc/mdadm.conf
+fi
+trylvm
+if got mount
+then	dev=$root
+	root=$(blkid|grep $root|sed 's/:.*//;q')
+	[ "$dev" = "$root" ] || dev="$root ($dev)"
+	echo "Mount $dev..."
+	mnt /mnt
+	arg posixovl && echo "And posixovl..." && mount.posixovl /mnt
+fi
+got loopfs && echo "Into file $root..." &&
+	losetup /dev/loop0 /mnt/$root && mount /dev/loop0 /mnt
+got bindfs && echo "Bind ${root/,/ to } ..." &&
+	mount --bind /mnt/${root%,*} /mnt/${root/,//}
+arg cryptoroot= && tryinit
+if use subroot
+then	cp $(LD_TRACE_LOADED_OBJECTS=1 /lib/ld*.so /usr/sbin/chroot | sed\
+		's|.*=> \(/lib/l[^ ]*\).*|\1|;/^\//!d') /usr/sbin/chroot /run
+	r=$root/run
+	quit $r "export LD_LIBRARY_PATH=$r:/lib"\
+		"$(cd /mnt; ls $r/ld-*) $r/chroot $root" "/$root"
+fi
+msg tmpfs
+root=100
+got tmpram
+r=$root
+root=90%
+got rootfssize
+[ $(busybox free|busybox awk '/Mem:/{print int(($4*100)/$3)}') -ge $r ] &&
+mount -t tmpfs -o size=$root tmpfs /mnt &&
+for i in $(ls -ar /)
+do	case "$i" in
+	.*)	;;
+	mnt|proc|sys)	mkdir /mnt/$i;;
+	usr|var|rootfs*) mv /$i /mnt;;
+	*)	cp -a /$i /mnt 2>/dev/null && continue
+		fail
+		umount /mnt
+		exit
 	esac
-	dmraid -ay
-	lvmsetup 
-	mount_mapper
+done || fail 3mSkipped
+quit
+msg aufs
+br=/mnt/.rw
+mkdir $br
+got rwdev && mnt $br && br=$br$d
+o=
+p=
+c=/mnt/.cdrom
+if [ -z "$(ls /mnt/rootfs* 2>/dev/null)" ]
+then	root=cdrom
+	got rodev
+	mkdir -p $c /mnt$c /mnt/.rw$c
+	mnt $c
+	o="-o 124"
+	p=/.cdrom/boot
+	d=/fs
+	got rodir && c=$c$root
 fi
-if grep -q softraid= /proc/cmdline; then
-	root="$(sed 's/.*softraid=\([^ ]*\).*/\1/' < /proc/cmdline)"
-	echo -n "Switching / to softraid $root..."
-	mdadm --examine --scan --config=partitions > /etc/mdadm.conf
-	grep -qs " $root " /etc/mdadm.conf ||
-		root=$(awk '/dev.md/ { print $2; exit }' < /etc/mdadm.conf)
-	grep level=raid /etc/mdadm.conf | load_raid
-	for i in 1 2 3 4 5 6 7 8 9; do
-		sleep $i
-		mdadm --assemble --scan
-		grep -qs ': active' /proc/mdstat && break
-	done
-	lvmsetup 
-	mount_mapper /etc/mdadm.conf
-fi
-if lvmsetup; then
-	echo -n "Switching / to lvm $root..."
-	mount_mapper
-fi
-if grep -q mount= /proc/cmdline; then
-	root="$(sed 's/.*mount=\([^ ]*\).*/\1/' < /proc/cmdline)"
-	dev=$(blkid | grep $root | sed 's/:.*//;q')
-	[ "$dev" = "$root" ] || root="$dev ($root)"
-	echo "Mounting $root ..."
-	if ! mount $dev /mnt; then
-		if echo $dev | grep -q "/dev/sd"; then
-			delay=`cat /sys/module/usb_storage/parameters/delay_use`
-			delay=$((1+$delay))
-			echo -n "sleep for $delay seconds..."
-			sleep $delay
-		fi
-		mount $dev /mnt
-	fi
-	grep -q posixovl /proc/cmdline &&
-	echo "Mounting posixovl.." &&
-	mount.posixovl /mnt
-fi
-if grep -q loopfs= /proc/cmdline; then
-	loopfs="$(sed 's/.*loopfs=\([^ ]*\).*/\1/' < /proc/cmdline)"
-	echo "Into loop file $loopfs..."
-	losetup /dev/loop0 /mnt/$loopfs
-	mount /dev/loop0 /mnt 2> /dev/null
-fi
-if grep -q bindfs= /proc/cmdline; then
-	bind="$(sed 's/.*bindfs=\([^ ]*\).*/\1/' < /proc/cmdline)"
-	echo "Binding ${bind/,/ to } ..."
-	mount --bind /mnt/${bind%,*} /mnt/${bind%,*}/${bind#*,}
-fi
-grep -q cryptoroot= /proc/cmdline && try_init
-umount /sys
-if grep -q subroot= /proc/cmdline; then
-	subroot="/$(sed 's/.*subroot=\([^ ]*\).*/\1/' < /proc/cmdline)" &&
-	echo -n "Chrooting to $subroot..."
-	run=$subroot/run
-	mount --move /run /mnt$run
-	cp $(LD_TRACE_LOADED_OBJECTS=1 /lib/ld*.so /usr/sbin/chroot | sed \
-	     's|.*=> \(/lib/l[^ ]*\).*|\1|;/^\//!d') /usr/sbin/chroot /mnt$run
-	success <<EOT
-export LD_LIBRARY_PATH=$run:/lib
-exec /sbin/switch_root mnt $run/$(cd /mnt$run ; ls ld-*) $run/chroot $subroot /sbin/init
-EOT
-fi
-echo -n "Switching / to tmpfs"
-size="$(grep rootfssize= < /proc/cmdline | \
-	sed 's/.*rootfssize=\([0-9]*[kmg%]\).*/-o size=\1/')"
-free=$(busybox free | busybox awk '/Mem:/ { print int(($4*100)/$3) }')
-umount /proc
-[ -n "$size" ] || size="-o size=90%"
-echo "exec /sbin/init" > /run/init
-if [ $free -lt 100 ] || ! mount -t tmpfs $size tmpfs /mnt; then
-	echo -e "\\033[70G[ \\033[1;33mSkipped\\033[0;39m]"
-	exit
-fi
-for i in $(ls -ar /); do
-	case "$i" in
-	.|..)	;;
-	mnt)	mkdir /mnt/mnt;;
-	usr|var) mv /$i /mnt ;;
-	*)	if ! cp -a /$i /mnt 2> /dev/null; then
-			failed
-			umount /mnt
-			exit
-		fi;;
-	esac
+l=0
+mod squashfs
+r=
+got isofs || for i in /mnt$p/rootfs?*.gz
+do	fs=${i#*root}
+	r=$r:/mnt/.$fs
+	mkdir -p /mnt/.rw/mnt/.$fs /mnt/.$fs
+	losetup $o /dev/loop$l $i
+	mount -o ro -t squashfs /dev/loop$((l++)) /mnt/.$fs
 done
-launch_init
-fi
+mod aufs
+mount -t aufs -o br=$br${r:-:$c} none /mnt
+quit