sys-apps/kexec-tools/files/kexec.init


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#!/sbin/runscript
# Copyright 1999-2005 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Header: /var/cvsroot/gentoo-x86/sys-apps/kexec-tools/files/kexec.init,v 1.5 2006/01/20 20:39:09 genstef Exp $

depend() {
	need checkfs
}

start() {
	[ -z "$KNAME" ] && KNAME="bzImage"
	[ -z "$BOOTPATH" ] && BOOTPATH="/boot"
	[ -z "$BOOTMOUNT" ] && BOOTMOUNT=1
	[ -z "$ROOTPART" ] && ROOTPART="`cut -f 1 -d' ' /etc/mtab | grep / | tr '\n' '\t' | cut -f 1`"
	[ -z "$KPARAM" ] && KPARAM="`sed -r 's:root=[a-zA-Z0-9/]+\s*::g' /proc/cmdline`"
	[ -n "$INITRD" ] && INITRDOPT="--initrd=$INITRD"

	if [ "$KNAME" != "-" ]
	then
		ebegin "Loading kernel $KNAME for Kexec"
		MNT=1
		LOCS="`cut -f 2 -d' ' /etc/mtab | tr '\n' ' '`" 
		for x in $LOCS
		do
			if [ "$x" == "$BOOTPATH" ]
			then
				MNT=0
			fi
		done

		if [ $MNT -eq 1 -a $BOOTMOUNT -eq 1 ]
		then
			/bin/mount $BOOTPATH
			if [ $? -ne 0 ]
			then
				eerror "Couldn't mount $BOOTPART"
				MNT="0"
			fi
		fi
		kexec -l $BOOTPATH/$KNAME --append="root=$ROOTPART $KPARAM" $INITRDOPT
		RES=$?
		if [ $MNT -eq 1 -a $BOOTMOUNT -eq 1 ]
		then
			/bin/umount $BOOTPATH
			if [ $? -ne 0 ]; then
				eerror "Couldn't umount $BOOTPART"
			fi
		fi
	else
		ebegin "Disabling kexec"
		kexec -u
		RES=$?
	fi

	eend $RES
}