#!/bin/sh

QUITE=false

log() {
	if [ "X$QUITE" != "Xtrue" ]
	then
		echo "$*"
	fi
}

err() {
	echo "$*" >&2
}

if [ "x${1}x" != "x-rx" ]
then
	exec </dev/console >/dev/console 2>&1
	log "### ISIRD ###"
	PATH=/bin
	cd /

	log " mount proc and sysfs and / as rw"
	mount -t proc proc /proc
	mount -t sysfs sysfs /sys
	mount -o remount,rw /

	log " mdev"
	mdev -s
	log " activate volume groups"
	vgscan --mknodes --ignorelockingfailure
	vgchange --ignorelockingfailure -P -a y

	if cmdline -c isirdsh
	then
		log " start shell"
		exec sh
	fi

else
	log " returned"
fi

log " detect cmdline options..."
ROOT="$(cmdline -c root)"
log "  root: #{ROOT}"
FLAGS="$(cmdline -c rootflags)"
log "  flags: ${FLAGS}"
if cmdline -c ro
then
	FLAGS="${FLAGS},ro"
elif cmdline -c rw
then
	FLAGS="${FLAGS},rw"
fi
log "  flags: ${FLAGS}"
FSTYPE="$(cmdline -c rootfstype)"
FSTYPE="${FSTYPE:-auto}"
log " umount sysfs"
umount /sys
FLAGS="${FLAGS#,}"
log " mount ${ROOT} as ${FSTYPE} with ${FLAGS}"
if ! mount -o "${FLAGS}" -t "${FSTYPE}" "${ROOT}" /mnt
then
	err "Can't mount root!"
	exec sh
fi

if ! test -d /mnt/initrd || mkdir /mnt/initrd
then
	err "/initrd doesn't exist on root!"
	exec sh
fi

log " Change to new root"
cd /mnt
if ! pivot_root . initrd
then
	err "Can't pivot root!"
	cd /
	exec sh
fi

log " OK :)"
export LD_LIBRARY_PATH="/initrd/lib"
LD_SO="${LD_LIBRARY_PATH}/ld-linux.so.2"
${LD_SO} /initrd/bin/ls /mnt/dev/*
echo 0x0100 > /initrd/proc/sys/kernel/real-root-dev
${LD_SO} /initrd/bin/umount -n /initrd/proc
exit 0