#! /bin/sh
# vim:ff=unix:enc=utf8:ts=3:sw=3:et
#
# rc.6		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.
#
# Version:	@(#)/etc/rc.d/rc.6	2.47 Sat Jan 13 13:37:26 PST 2001
#
# Author:	Miquel van Smoorenburg <miquels@drinkel.nl.mugnet.org>
# Modified by:  Patrick J. Volkerding, <volkerdi@slackware.com>
#

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

# If there are SystemV init scripts for this runlevel, run them.
if test -x /etc/rc.d/rc.sysvinit ; then
   /etc/rc.d/rc.sysvinit
fi

# Set linefeed mode to avoid staircase effect.
/bin/stty onlcr

echo "Running shutdown script $0:"

# Find out how we were called.
case "$0" in
	*0)
		command="halt"
		;;
	*6)
		command="reboot"
		;;
	*)
		echo "$0: call me as \"rc.0\" or \"rc.6\" please!"
		exit 1
		;;
esac

# Save the system time to the hardware clock using hwclock --systohc.
if test -x /sbin/hwclock ; then
   # Check for a broken motherboard RTC clock (where ioports for rtc are
   # unknown) to prevent hwclock causing a hang:
   if ! grep -q -w rtc /proc/ioports ; then
      CLOCK_OPT="--directisa"
   fi
   if grep -q "^UTC" /etc/hardwareclock 2> /dev/null ; then
      echo "Saving system time to the hardware clock (UTC)."
      /sbin/hwclock $CLOCK_OPT --utc --systohc
   else
      echo "Saving system time to the hardware clock (localtime)."
      /sbin/hwclock  $CLOCK_OPT --localtime --systohc
   fi
fi

# Run any local shutdown scripts:
if test -x /etc/rc.d/rc.local_shutdown ; then
   /etc/rc.d/rc.local_shutdown stop
fi

# Stop the Apache web server:
if test -x /etc/rc.d/rc.httpd ; then
   /etc/rc.d/rc.httpd stop
fi

# Stop the MySQL database:
if test -r /var/run/mysql/mysql.pid ; then
   /etc/rc.d/rc.mysqld stop
fi

# Stop the PostgreSQL database:
if test -x /etc/rc.d/rc.postgresql ; then
   /etc/rc.d/rc.postgresql stop
fi

# Stop the Samba server:
if test -x /etc/rc.d/rc.samba ; then
   /etc/rc.d/rc.samba stop
fi

# Shut down the NFS server:
if test -x /etc/rc.d/rc.nfsd ; then
   /etc/rc.d/rc.nfsd stop
fi

# Shut down the SSH server:
if test -x /etc/rc.d/rc.sshd ; then
   /etc/rc.d/rc.sshd stop
fi

# Shut down the SASL authentication daemon:
if test -x /etc/rc.d/rc.saslauthd ; then
   /etc/rc.d/rc.saslauthd stop
fi

# Shut down OpenLDAP:
if test -x /etc/rc.d/rc.openldap ; then
   /etc/rc.d/rc.openldap stop
fi

# Stop D-Bus:
if test -x /etc/rc.d/rc.messagebus ; then
   /etc/rc.d/rc.messagebus stop
fi

# Unmount any NFS, SMB, or CIFS filesystems:
echo "Unmounting remote filesystems."
/bin/umount -v -a -r -t nfs,smbfs,cifs

# Try to shut down pppd:
if /usr/bin/pgrep pppd > /dev/null ; then
   if test -x /usr/sbin/ppp-off ; then
      /usr/sbin/ppp-off
   fi
fi

# Bring down the networking system, but first make sure that this
# isn't a diskless client with the / partition mounted via NFS:
if ! /bin/mount | /bin/grep -q 'on / type nfs' ; then
   if test -x /etc/rc.d/rc.inet1 ; then
      /etc/rc.d/rc.inet1 stop
   fi
fi

# In case dhcpcd might have been manually started on the command line,
# look for the .pid file, and shut dhcpcd down if it's found:
if /bin/ls /etc/dhcpc/*.pid > /dev/null 2>&1 ; then
   /sbin/dhcpcd -k > /dev/null 2>&1
   # A little time for /etc/resolv.conf and/or other files to
   # restore themselves.
   sleep 2
fi

# Shut down PCMCIA devices:
if test -x /etc/rc.d/rc.pcmcia ; then
   /etc/rc.d/rc.pcmcia stop
   # The cards might need a little extra time here to deactivate:
   /bin/sleep 5
fi

# Turn off process accounting:
if test -x /sbin/accton && test -r /var/log/pacct ; then
   /sbin/accton off
fi

# Terminate acpid before syslog:
if test -x /etc/rc.d/rc.acpid && test -r /var/run/acpid.pid ; then # quit
   /etc/rc.d/rc.acpid stop
fi

# Kill all processes.
# INIT is supposed to handle this entirely now, but this didn't always
# work correctly without this second pass at killing off the processes.
# Since INIT already notified the user that processes were being killed,
# we'll avoid echoing this info this time around.
if test "$1" != "fast" ; then # shutdown did not already kill all processes
   /sbin/killall5 -15 
   /bin/sleep 5
   /sbin/killall5 -9
fi

# Try to turn off quota.
if /bin/grep -q quota /etc/fstab ; then
   if test -x /sbin/quotaoff ; then
      echo "Turning off filesystem quotas."
      /sbin/quotaoff -a
   fi
fi

# Carry a random seed between reboots.
echo "Saving random seed from /dev/urandom in /etc/random-seed."
# Use the pool size from /proc, or 512 bytes:
if test -r /proc/sys/kernel/random/poolsize ; then
   read POOLSIZE < /proc/sys/kernel/random/poolsize
   /bin/dd if=/dev/urandom of=/etc/random-seed count=1 bs="$POOLSIZE" 2> /dev/null
else
   /bin/dd if=/dev/urandom of=/etc/random-seed count=1 bs=512 2> /dev/null
fi
/bin/chmod 600 /etc/random-seed

# Before unmounting file systems write a reboot or halt record to wtmp.
$command -w

# Clear /var/lock/subsys.
rm -f /var/lock/subsys/* 2> /dev/null

# Turn off swap:
echo "Turning off swap."
/sbin/swapoff -a
/bin/sync

# Umount any LVM volumes:
if /bin/mount | /bin/grep -q '^/dev/mapper/' ; then
   echo "Unmounting LVM volumes."
   /bin/umount -v $(/bin/mount | /bin/grep '^/dev/mapper/' | /bin/cut -d ' ' -f 3 | /bin/tac)
fi

echo "Unmounting local file systems."
/bin/umount -v -a -t no,proc,sysfs

echo "Remounting root filesystem read-only."
/bin/mount -v -n -o remount,ro /

# This never hurts:
/bin/sync

# Close any volumes opened by cryptsetup:
if test -f /etc/crypttab -a -x /sbin/cryptsetup.static ; then
   grep -v "^#" /etc/crypttab |
   while read LUKS DEV _ OPTS; do
      if test "$LUKS" ; then
         if /sbin/cryptsetup.static isLuks "$DEV" 2>/dev/null ; then
            echo "Locking LUKS crypt volume '$LUKS':"
            /sbin/cryptsetup.static luksClose "$LUKS"
         elif echo "$OPTS" | grep -wq swap ; then
            # If any of the volumes was used as encrypted swap,
            # then run mkswap on the underlying device -
            # in case other Linux installations on this computer should use it:
            echo "Erasing encrypted swap '$LUKS' and restoring normal swap on $DEV:"
            /sbin/cryptsetup.static remove "$LUKS"
            mkswap "$DEV"
         fi
      fi
  done
fi

# Deactivate LVM volume groups:
if test -r /etc/lvmtab || test -d /etc/lvm/backup ; then
   echo "Deactivating LVM volume groups:"
   /sbin/vgchange -an --ignorelockingfailure
fi

# This never hurts again (especially since root-on-LVM always fails
# to deactivate the / logical volume...  but at least it was
# remounted as read-only first)
/bin/sync

# sleep 3 fixes problems with some hard drives that don't
# otherwise finish syncing before reboot or poweroff
/bin/sleep 3

# This is to ensure all processes have completed on SMP machines:
wait

if test -x /sbin/genpowerd ; then
   # See if this is a powerfail situation:
   if /bin/egrep -q "FAIL|SCRAM" /etc/upsstatus 2> /dev/null ; then
      # Signal UPS to shut off the inverter:
      if /sbin/genpowerd -k ; then
         echo
         echo "There was an error signaling the UPS."
         echo "Perhaps you need to edit /etc/genpowerd.conf to configure"
         echo "the serial line and UPS type."
         # Wasting 15 seconds of precious power:
         /bin/sleep 15
      fi
   fi
fi

# Now halt (poweroff with APM or ACPI enabled kernels) or reboot.
if test "$command" = "reboot" ; then
   echo "Rebooting."
   /sbin/reboot
else
   /sbin/poweroff
fi