The halt.sh script that freezed the system

OLDHALT.SH (text/plain), 3.74 KB, created by David T. Yorke on 2002-12-08 15:20:44 UTC

# Copyright 1999-2002 Gentoo Technologies, Inc.
# Distributed under the terms of the GNU General Public License v2
# $Header: /home/cvsroot/gentoo-src/rc-scripts/init.d/halt.sh,v 1.20 2002/11/18 13:07:02 azarah Exp $


#we try to deactivate swap first because it seems to need devfsd running
#to work.  The TERM and KILL stuff will zap devfsd, so...

ebegin "Deactivating swap"
swapoff -a &>/dev/null
eend $?

#we need to properly terminate devfsd to save the permissions
if [ "$(ps -A | egrep 'devfsd')" ]
then
	ebegin "Stopping devfsd"
	killall -15 devfsd &>/dev/null
	eend $?
fi

ebegin "Sending all processes the TERM signal"
killall5 -15 &>/dev/null
eend $?
sleep 5
ebegin "Sending all processes the KILL signal"
killall5 -9 &>/dev/null
eend $?

# Write a reboot record to /var/log/wtmp before unmounting

halt -w &>/dev/null

#unmounting should use /proc/mounts and work with/without devfsd running

# Credits for next function to unmount loop devices, goes to:
#
#	Miquel van Smoorenburg, <[e-mail]>
#	Modified for RHS Linux by Damien Neil
#
#
# Unmount file systems, killing processes if we have to.
# Unmount loopback stuff first
remaining="$(awk '!/^#/ && $1 ~ /^\/dev\/loop/ && $2 != "/" {print $1}' /proc/mounts |sort -r)"
[ -n "${remaining}" ] && {
	sig=
	retry=3
	while [ -n "${remaining}" -a "${retry}" -gt 0 ]
	do
		if [ "${retry}" -lt 3 ]
		then
			ebegin "Unmounting loopback filesystems (retry)"
			umount ${remaining} &>/dev/null
			eend $? "Failed to unmount filesystems this retry"
		else
			ebegin "Unmounting loopback filesystems"
			umount ${remaining} &>/dev/null
			eend $? "Failed to unmount filesystems"
		fi
		for dev in ${remaining}
		do
			losetup ${dev} &>/dev/null && {
				ebegin "  Detaching loopback device ${dev}"
				/sbin/losetup -d ${dev} &>/dev/null
				eend $? "Failed to detach device ${dev}"
			}
		done
		remaining="$(awk '!/^#/ && $1 ~ /^\/dev\/loop/ && $2 != "/" {print $2}' /proc/mounts |sort -r)"
		[ -z "${remaining}" ] && break
		/bin/fuser -k -m ${sig} ${remaining} &>/dev/null
		sleep 5
		retry=$((${retry} -1))
		sig=-9
	done
}

#try to unmount all filesystems (no /proc,tmpfs,devfs,etc)
#this is needed to make sure we dont have a mounted filesystem on a LVM volume
#when shutting LVM down ...
ebegin "Unmounting filesystems"
#awk should still be availible (allthough we should consider moving it to /bin if problems arise)
for x in $(awk '!/(^#|proc|devfs|tmpfs|^none|^\/dev\/root| \/ )/ {print $2}' /proc/mounts |sort -r)
do
	umount -f -r ${x} &>/dev/null
done
eend 0

#stop RAID
if [ -x /sbin/raidstop -a -f /etc/raidtab -a -f /proc/mdstat ]
then
	ebegin "Stopping software RAID"
	for x in $(grep -E "md[0-9]+[[:space:]]?: active raid" /proc/mdstat | awk -F ':' '{print $1}')
	do
		raidstop /dev/${x} >/dev/null
	done
	eend $? "Failed to stop software RAID"
fi

#stop LVM
if [ -x /sbin/vgchange -a -f /etc/lvmtab ] && [ -d /proc/lvm ]
then
	ebegin "Shutting down the Logical Volume Manager"
	/sbin/vgchange -a n >/dev/null
	eend $? "Failed to shut LVM down"
fi

ebegin "Remounting remaining filesystems readonly"
#get better results with a sync and sleep
sync;sync
sleep 2
umount -a -r -n -t nodevfs,noproc,notmpfs &>/dev/null
if [ "$?" -ne 0 ]
then
	killall5 -9  &>/dev/null
	umount -a -r -n -l -d -f -t nodevfs,noproc &>/dev/null
	if [ "$?" -ne 0 ]
	then
		eend 1
		sync; sync
		[ -f /etc/killpower ] && ups_kill_power
		/sbin/sulogin -t 10 /dev/console
	else
		eend 0
	fi
else
	eend 0
fi

# inform if there is a forced or skipped fsck
if [ -f /fastboot ]
then
	echo
	ewarn "Fsck will be skipped on next startup"
elif [ -f /forcefsck ]
then
	echo
	ewarn "A full fsck will be forced on next startup"
fi

if [ -f /etc/killpower -a -x /sbin/upsdrvctl ]
then
	ewarn "Signalling ups driver(s) to kill the load!"
	/sbin/upsdrvctl shutdown
fi


# vim:ts=4