Add (commented out) vm.oom_kill_allocating_task sysctl knob

[projects/rc-scripts.git] / rc.d / rc.shutdown

#!/bin/sh
#
# shutdown	Common script for system halt/reboot.
#
# Author:	Miquel van Smoorenburg, <miquels@drinkel.nl.mugnet.org>
#

# Set the path.
PATH=/sbin:/bin:/usr/bin:/usr/sbin

# move to root dir
cd /

IN_SHUTDOWN=yes

. /etc/rc.d/init.d/functions

# avoid keyboard interruption
trap "echo" INT SEGV QUIT TERM
set +e

rc_splash "reboot"

# Kill all processes.
[ "${BASH+bash}" = bash ] && enable kill

runlevel=$1
previous=$2

# Stop blogd before umounting /var
if [ -x /sbin/blogd ]; then
	killall -q -QUIT blogd
fi

if [ -e /dev/rtc -o -e /dev/rtc0 ]; then
	run_cmd "$(nls 'Syncing hardware clock to system time')" hwclock --systohc
fi

# check for other processes.
# there could be none if all services were terminated properly
# pgrep -g 0 requires procps >= 3.2.6-1.1
# XXX: pgrep is on /usr!
pids=$(pgrep -g 0 -l -v | grep -v '^1 ')
if [ -n "$pids" ] || [ ! -x /usr/bin/pgrep ]; then
	run_cmd "Sending all processes the TERM signal" killall5 -15
fi

pids=$(pgrep -g 0 -l -v | grep -v '^1 ')
if [ -n "$pids" ] || [ ! -x /usr/bin/pgrep ]; then
	sleep 5
	run_cmd "Sending all processes the KILL signal" killall5 -9
fi

# Write to wtmp file before unmounting /var
halt -w

if ! is_yes "$VSERVER"; then
	# Turn off swap, then unmount file systems.
	run_cmd "Turning off swap" swapoff -a

	[ -x /etc/rc.d/rc.acct ] && /etc/rc.d/rc.acct stop

	if [ -x /sbin/quotaoff ]; then
		run_cmd "Turning off quotas for local filesystems" /sbin/quotaoff -a
	fi

	# grab kexec_loaded state before we umount /sys
	kexec_loaded=`cat /sys/kernel/kexec_loaded 2>/dev/null`

	# Unmount file systems, killing processes if we have to.
	sig=-15
	retry=3
	force=
	if [ -z "$UMOUNT_IGNORE" ]; then
		UMOUNT_IGNORE="/"
	else
		UMOUNT_IGNORE="/ $UMOUNT_IGNORE"
	fi
	remaining=$(awk -v ig="^($UMOUNT_IGNORE)$" 'BEGIN { gsub(/[\t ]+/, "|", ig); } \
			$3 !~ /^(proc|loopfs|devpts|devtmpfs|shm|iso9660|ramfs|tmpfs|sysfs|securityfs|squashfs)$/ \
			&& $1 !~ /^(none|\/dev\/root)$/ \
			&& $2 !~ ig {print $2}' /proc/mounts)
	while [ -n "$remaining" -a "$retry" -gt 0 ]; do
	 	show "Unmounting file systems"; busy
		ERRORS=$(umount -a $force -t noproc,nosysfs 2>&1); rc=$?

		# we might had unmounted /usr, recheck $TPUT availability
		# but well. we need tput only for show() and busy() (ok() and fail() messages are already cached)
		# TODO: look ahead the messages?
		if is_yes "$TPUT"; then
			TPUT=
			rc_gettext_init
		fi

		if [ $rc = 0 ]; then
			ok
		else
			fail
			[ -n "$ERRORS" ] && echo "$ERRORS"
		fi

		sleep 2
		remaining=$(awk -v ig="^($UMOUNT_IGNORE)$" 'BEGIN { gsub(/[\t ]+/, "|", ig); } \
				$3 !~ /^(proc|loopfs|devpts|devtmpfs|shm|iso9660|ramfs|tmpfs|sysfs|securityfs|squashfs)$/ \
				&& $1 !~ /^(none|\/dev\/root)$/ \
				&& $2 !~ ig {print $2}' /proc/mounts)
		[ -z "$remaining" ] && break
		fuser -k -m $sig $remaining > /dev/null
		sleep 5
		retry=$(($retry-1))
		sig=-9
		force="-f"
	done

	run_cmd "Remounting root filesystem in ro mode" mount -n -o remount,ro /

	if [ -x /sbin/vgchange ]; then
		lvmversion=$(LC_ALL=C /sbin/vgchange --version 2>/dev/null | awk '/LVM version:/{if ($3 >= 2) print "2"}')
		if [ "$lvmversion" = "2" ]; then
			lvmsysinit="--sysinit --noudevsync"
		else
			lvmsysinit=""
		fi
		/sbin/vgchange -a n $lvmsysinit > /dev/null 2>&1
	fi

	if [ -x /sbin/mdadm -a -f /etc/mdadm.conf ]; then
		if grep -qE "^([[:blank:]]|)ARRAY[[:blank:]]" /etc/mdadm.conf 2>/dev/null; then
			/sbin/mdadm --stop --scan > /dev/null 2>&1
			rc=$?
		fi
	fi

	show "Remounting remaining filesystems ro mode"; busy
	if mount | awk '/ext2|ext3|reiserfs|xfs|jfs/ { print $3 }' | while read line; do mount -n -o ro,remount $line; done; then
		ok
	else
		fail
	fi
	_rebootwhat="system"
else
	_rebootwhat="vserver"
fi

if [ -f /etc/crypttab ] && ! is_empty_file /etc/crypttab; then
	. /etc/rc.d/init.d/cryptsetup

	show "Stopping disk encryption"
	halt_crypto && ok || fail
fi

if [ "$runlevel" = "0" ] ; then
	show "The $_rebootwhat is halted"; ok
	if [ -f /fastboot ]; then
	   	show "On the next boot fsck will be skipped."; ok
	fi

	if [ -f /etc/killpower -a -f /etc/sysconfig/ups ] ; then
		. /etc/sysconfig/ups
		if is_yes "$POWEROFF_UPS"; then
			if [ -d /etc/ups.d ]; then
				for i in /etc/ups.d/*.sh; do
					[ ! -f $i -o ! -x $i ] && continue
					$i poweroff
				done
			fi
		       [ -x /sbin/poweroff-ups ] && /sbin/poweroff-ups
	       fi
	fi
	[ "$previous" != "unknown" ] && halt -d -p -f
else
	show "Please stand by while rebooting the $_rebootwhat"; ok
	if [ -f /fastboot ]; then
	   	show "On the next boot fsck will be skipped."; ok
	fi

	if [ -x /sbin/kexec ] && [ "$kexec_loaded" = "1" ]; then
	   	show "Will now restart with kexec"
		/sbin/kexec -e
		fail
	fi

	[ "$previous" != "unknown" ] && reboot -d -f
fi