#! /bin/sh
#
# 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 [ -x /etc/rc.d/rc.sysvinit ]; then
  . /etc/rc.d/rc.sysvinit
fi

# Set linefeed mode to avoid staircase effect.
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 [ -x /sbin/hwclock ]; then
  if grep -q "^UTC" /etc/hardwareclock 2> /dev/null ; then
    echo "Saving system time to the hardware clock (UTC)."
    /sbin/hwclock --utc --systohc
  else
    echo "Saving system time to the hardware clock (localtime)."
    /sbin/hwclock --localtime --systohc
  fi
fi

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

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

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

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

# If it looks like we use an initrd, prepare for one at next boot:
if grep -q -w initrd /var/log/messages ; then
  mkdir -p /initrd
fi

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

# Try to kill dhcpcd so the DHCP leases can be returned:
killall -15 dhcpcd 1> /dev/null 2> /dev/null

# Try to shut down pppd:
PS="$(ps ax)"
if echo "$PS" | grep -q -w pppd ; then
  if [ -x /usr/sbin/ppp-off ]; then
    /usr/sbin/ppp-off
  fi
fi

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

# Turn off process accounting:
if [ -x /sbin/accton -a -r /var/log/pacct ]; then
  echo "Turning off process accounting."
  /sbin/accton
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 [ "$1" != "fast" ]; then # shutdown did not already kill all processes
  killall5 -15
  sleep 5
  killall5 -9
fi

# Try to turn off quota.
if grep -q quota /etc/fstab ; then
  if [ -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 [ -r /proc/sys/kernel/random/poolsize ]; then
  dd if=/dev/urandom of=/etc/random-seed count=1 bs=$(cat /proc/sys/kernel/random/poolsize) 2> /dev/null
else
  dd if=/dev/urandom of=/etc/random-seed count=1 bs=512 2> /dev/null
fi
chmod 600 /etc/random-seed

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

# Clear /var/lock/subsys.
if [ -d /var/lock/subsys ]; then
  rm -f /var/lock/subsys/*
fi

# A function to deactivate LVM volume groups:
deactivate_lvm() {
  if [ -r /etc/lvmtab -o -d /etc/lvm/backup ]; then
    echo "Deactivating LVM volume groups:"
    if cat /proc/sys/kernel/osrelease | cut -f 1,2 -d . | grep -q -w 2.4 2> /dev/null ; then
      /sbin/vgchange -an
    else
      /sbin/vgchange -an --ignorelockingfailure
    fi
    sleep 10
  fi
}

# Turn off swap, then unmount local file systems.
echo "Turning off swap."
swapoff -a
sync

echo "Unmounting local file systems."
# Don't remount UMSDOS root volumes:
if [ ! "$(mount | head -n 1 | cut -d ' ' -f 5)" = "umsdos" ]; then
  umount -a -t nonfs,noproc,nosysfs
  deactivate_lvm
  umount -a -r -t nonfs,noproc,nosysfs
  echo "Remounting root filesystem read-only."
  mount -n -o remount,ro /
else
  umount -a -t nonfs,noproc,nosysfs,noumsdos,nosmbfs
  deactivate_lvm
  umount -a -r -t nonfs,noproc,nosysfs,noumsdos,nosmbfs
fi

# This never hurts:
sync

# sleep 1 fixes problems with some hard drives that don't
# otherwise finish syncing before reboot or poweroff
sleep 1

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

if [ -x /sbin/genpowerd ]; then
  # See if this is a powerfail situation:
  if egrep -q "FAIL|SCRAM" /etc/upsstatus 2> /dev/null ; then
    # Signal UPS to shut off the inverter:
    /sbin/genpowerd -k
    if [ ! $? = 0 ]; 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:
      sleep 15
    fi
  fi
fi

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