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#!/bin/bash

#

# halt          This file is executed by init when it goes into runlevel

#               0 (halt) or runlevel 6 (reboot). It kills all processes,

#               unmounts file systems and then either halts or reboots.

#

# Author:       Miquel van Smoorenburg, <miquels@drinkel.nl.mugnet.org>

#               Modified for RHS Linux by Damien Neil

#

NOLOCALE=1

. /etc/init.d/functions

UMOUNT="umount"

[ ! -w /etc ] && UMOUNT="umount -n"

action() {

   echo -n "$1 "

   shift

   if [ "$BOOTUP" = "color" ]; then

      "$@" && echo_success || echo_failure

   else

      "$@"

   fi

   echo

}

halt_crypto() {

    fnval=0

    while read dst src key; do

	[ -z "$dst" -o "${dst#\#}" != "$dst" ] && continue

        if [ -b "/dev/mapper/$dst" ]; then

            if /sbin/dmsetup info "$dst" | grep -q '^Open count: *0$'; then

                /sbin/cryptsetup remove "$dst"

            else

                fnval=1

            fi

        fi

    done < /etc/crypttab

    return $fnval

}

# See how we were called.

case "$0" in

   *halt)

	message=$"Halting system..."

	command="/sbin/halt"

	;;

   *reboot)

	message=$"Please stand by while rebooting the system..."

	command="/sbin/reboot"

	kexec_command="/sbin/kexec"

	;;

   *)

	echo $"$0: call me as 'halt' or 'reboot' please!"

	exit 1

	;;

esac

case "$1" in

   *start)

   	;;

   *)

	echo $"Usage: $0 {start}"

	exit 1

	;;

esac

# Kill all processes.

[ "${BASH+bash}" = bash ] && enable kill

action $"Sending all processes the TERM signal..." /sbin/killall5 -15

sleep 5

action $"Sending all processes the KILL signal..."  /sbin/killall5 -9

# Write to wtmp file before unmounting /var

/sbin/halt -w

# Save mixer settings, here for lack of a better place.

grep -q "\(alsa\)" /proc/devices

if [ $? = 0 -a -x /usr/sbin/alsactl ]; then

   action $"Saving mixer settings" alsactl store

fi

# Save random seed

touch /var/lib/random-seed

chmod 600 /var/lib/random-seed

action $"Saving random seed: " dd if=/dev/urandom of=/var/lib/random-seed count=1 bs=512 2>/dev/null

# Sync the system clock.

ARC=0

SRM=0

UTC=0

if [ -f /etc/sysconfig/clock ]; then

   . /etc/sysconfig/clock

   # convert old style clock config to new values

   if [ "${CLOCKMODE}" = "GMT" ]; then

      UTC=true

   elif [ "${CLOCKMODE}" = "ARC" ]; then

      ARC=true

   fi

fi

CLOCKDEF=""

CLOCKFLAGS="$CLOCKFLAGS --systohc"

case "$UTC" in

   yes|true)

	CLOCKFLAGS="$CLOCKFLAGS -u";

	CLOCKDEF="$CLOCKDEF (utc)";

	;;

   no|false)

	CLOCKFLAGS="$CLOCKFLAGS --localtime";

	CLOCKDEF="$CLOCKDEF (localtime)";

	;;

esac

case "$ARC" in

   yes|true)

	CLOCKFLAGS="$CLOCKFLAGS -A";

	CLOCKDEF="$CLOCKDEF (arc)";

	;;

esac

case "$SRM" in

   yes|true)

	CLOCKFLAGS="$CLOCKFLAGS -S";

	CLOCKDEF="$CLOCKDEF (srm)";

	;;

esac

[ -x /sbin/hwclock ] && action $"Syncing hardware clock to system time" /sbin/hwclock $CLOCKFLAGS

# Try to unmount tmpfs filesystems to avoid swapping them in.  Ignore failures.

tmpfs=$(awk '$2 ~ /^\/($|proc|dev)/ { next; }

	     $3 == "tmpfs" { print $2; }' /proc/mounts | sort -r)

[ -n "$tmpfs" ] && fstab-decode $UMOUNT $tmpfs 2>/dev/null

# Turn off swap, then unmount file systems.

[ -f /proc/swaps ] && SWAPS=`awk '! /^Filename/ { print $1 }' /proc/swaps`

if [ -n "$SWAPS" ]; then

    action $"Turning off swap: " swapoff $SWAPS

    for dst in $SWAPS; do

	if [[ "$dst" =~ "^/dev/mapper" ]] \

	    && [ "$(dmsetup status "$dst" | cut -d ' ' -f 3)" = crypt ]; then

	    backdev=$(/sbin/cryptsetup status "$dst" \

		| awk '$1 == "device:" { print $2 }')

	    /sbin/cryptsetup remove "$dst"

	fi

    done

fi

[ -x /sbin/quotaoff ] && action $"Turning off quotas: " /sbin/quotaoff -aug

# Unmount file systems, killing processes if we have to.

# Unmount loopback stuff first

__umount_loopback_loop

# Unmount RPC pipe file systems

__umount_loop '$3 ~ /^rpc_pipefs$/ || $3 ~ /^rpc_svc_gss_pipefs$/ {print $2}' \

    /proc/mounts \

    $"Unmounting pipe file systems: " \

    $"Unmounting pipe file systems (retry): " \

    -f

LANG=C __umount_loop '$2 ~ /^\/$|^\/proc|^\/dev/{next}

	$3 == "tmpfs" || $3 == "proc" {print $2 ; next}

	/(loopfs|autofs|nfs|cifs|smbfs|ncpfs|sysfs|^none|^\/dev\/ram|^\/dev\/root$)/ {next}

	{print $2}' /proc/mounts \

	$"Unmounting file systems: " \

	$"Unmounting file systems (retry): " \

	-f

[ -f /proc/bus/usb/devices ] && $UMOUNT /proc/bus/usb

[ -f /etc/crypttab ] && \

    LANG=C action $"Stopping disk encryption: " halt_crypto

# remove the crash indicator flag

rm -f /.autofsck

# Try all file systems other than root, essential filesystems and RAM disks,

# one last time.

awk '$2 !~ /\/(|dev|proc|selinux)$/ && $1 !~ /^\/dev\/ram/ { print $2 }' \

    /proc/mounts | sort -r | \

  while read line; do

    fstab-decode $UMOUNT -f $line

done

if [ -x /sbin/halt.local ]; then

   /sbin/halt.local

fi

# Remount read only anything that's left mounted.

# echo $"Remounting remaining filesystems readonly"

mount | awk '{ print $3 }' | while read line; do

    fstab-decode mount -n -o ro,remount $line

done

# Now halt or reboot.

echo $"$message"

if [ -f /fastboot ]; then

 echo $"On the next boot fsck will be skipped."

elif [ -f /forcefsck ]; then

 echo $"On the next boot fsck will be forced."

fi

if [ "$command" = /sbin/halt -a -r /etc/ups/upsmon.conf -a -f /etc/killpower -a -f /etc/sysconfig/ups ] ; then

	. /etc/sysconfig/ups

	if [ "$SERVER" = "yes" -a "$MODEL" = "upsdrvctl" ] ; then

		/sbin/upsdrvctl shutdown

	elif [ "$SERVER" = "yes" -a "$MODEL" != "NONE" -a -n "$MODEL" -a -n "$DEVICE" ] ; then

		$MODEL $OPTIONS_HALT -k $DEVICE

	fi

fi

# First, try kexec. If that fails, fall back to rebooting the old way.

[ -n "$kexec_command" ] && $kexec_command -e -x >& /dev/null

HALTARGS="-d"

[ -f /poweroff -o ! -f /halt ] && HALTARGS="$HALTARGS -p"

exec $command $HALTARGS