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

# 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 ] && ! is_no "$RC_BOOTLOG"; then
	killall -QUIT blogd
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
pids=$(pgrep -g 0 -l -v | grep -v '^1 ')
if [ -n "$pids" ]; then
	run_cmd "Sending all processes the TERM signal" killall5 -15
fi

pids=$(pgrep -g 0 -l -v | grep -v '^1 ')
if [ -n "$pids" ]; 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

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

		# 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 '!/(^#| proc | loopfs | devfs | devpts | shm | iso9660 | ramfs | tmpfs | sysfs | securityfs | squashfs |^none|^\/dev\/root| \/ )/ {print $2}' /proc/mounts)
		[ -z "$remaining" ] && break
		/sbin/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 is_yes "$EVMS_LVM" || [ -x /sbin/vgscan -a -x /sbin/vgchange ]; then
		lvmversion=$(/sbin/vgchange --version 2>/dev/null | awk '{gsub("vgchange: Logical Volume Manager ",""); gsub("LVM version:     ",""); gsub(/\..*/,"");print $1; exit}')
		if [ "$lvmversion" = "2" ] ; then
			lvmignorelock="--ignorelockingfailure"
		else
			lvmignorelock=""
		fi
		run_cmd "Stopping LVM volume groups" /sbin/vgchange -a n $lvmignorelock
	fi

	goraidtab=1
	if [ -x /sbin/mdadm -a -f /etc/mdadm.conf ]; then
		if (grep -qE "^([[:blank:]]|)ARRAY[[:blank:]]" /etc/mdadm.conf 2>/dev/null); then
			run_cmd "Turning off RAID devices" /sbin/mdadm --stop --scan
			rc=$?
			[ "$rc" -eq 0 ] && goraidtab=0
		fi
	fi

	# turn off raid
	if [ -x /sbin/raidstop -a -f /etc/raidtab -a "$goraidtab" -eq 1 ]; then
		# we can not use raidstop -a here because this will only stop
		# devices listed in the default config file which is not always
		# the case. So we look only for the active raid devices
		if [ -f /proc/mdstat ] ; then
			mddevs=$(awk '/^md.* active/ {print $1}' /proc/mdstat)
			for mddev in $mddevs ; do
				show "Turning off RAID for %s" "$mddev"
				daemon /sbin/raidstop /dev/$mddev
			done
			unset mddev mddevs
		fi
		# runcmd "Turning off RAID" /sbin/raidstop -a
	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 [ "$runlevel" = "0" ] ; then
	show "The $_rebootwhat is halted"; ok
	[ -f /fastboot ] && (show "On the next boot fsck will be skipped."; ok)

	if [ -x /sbin/poweroff-ups -a -f /etc/killpower -a -f /etc/sysconfig/ups ] ; then
		. /etc/sysconfig/ups
		is_yes "$POWEROFF_UPS" && /sbin/poweroff-ups
	fi
	[ "$previous" != "unknown" ] && eval halt -d -p
else
	show "Please stand by while rebooting the $_rebootwhat"; ok
	[ -f /fastboot ] && (show "On the next boot fsck will be skipped."; ok)
	[ -x /sbin/kexec ] && /sbin/kexec -e
	[ "$previous" != "unknown" ] && eval reboot -d
fi

# This must be last line !
# vi:syntax=sh