#!/bin/sh
#
# /etc/runit/3:  Systems tasks to shutdown or reboot (Stage 3).
#
# Version:       (#) 1.00  2009-12-07 (MAF)
#                (#) 1.01  2010-03-12 (MAF)
#                (#) 1.02  2010-06-17 (MAF)
#                (#) 1.03  2010-06-30 (MAF)
#                (#) 2.00  2010-07-09 (MAF)
#                (#) 2.01  2010-07-21 (MAF)
#                (#) 2.02  2010-07-29 (MAF)
#                (#) 2.03  2010-07-30 (MAF)
#                (#) 2.04  2010-08-21 (MAF)
#
# Author:        Matías A. Fonzo, <selk@dragora.org>.
#
# Under the terms of the GNU General Public License.

PATH=/bin:/sbin:/usr/bin:/usr/sbin

# Functions.

# A function for display a message:
msg() { printf '%s\n' "$@"; }

# A function for send the TERM signal:
send_signal() {
  ps -e | pgrep -x -v '(ps|pgrep|xargs|kill|3|1)' | xargs kill -"$1"
}

# A function to remount the filesystem in
# read-only mode in case of emergency:
remount_ro() {
  msg "Remounting the root filesystem in read-only mode:"
  mount -vn -o remount,ro /
}

# Stop the services:
msg "Waiting for services to stop..."
sv -w 7 force-stop /service/*
sv -w 5 exit /service/* > /dev/null 2>&1

# Save the system time -> the hardware clock:
if [ -f /etc/rc.d/rc.clock ]; then
  sh /etc/rc.d/rc.clock stop
fi

# Run the local_shutdown script (if exists):
if [ -x /etc/rc.d/rc.local_shutdown ]; then
  /etc/rc.d/rc.local_shutdown
fi

# Stop the quotas (if needed):
if egrep -q -m 1 '(usr|grp)quota' /etc/fstab ; then
  if [ -x /usr/sbin/quotaoff ]; then
    msg "Deactivating quotas:  /usr/sbin/quotaoff -av"
    /usr/sbin/quotaoff -av
  fi
fi

# Stop the fuse connections:
if [ -x /etc/rc.d/rc.fuse ]; then
  /etc/rc.d/rc.fuse stop
fi

# Stop the local interface:
if [ -x /etc/rc.d/rc.iface_lo ]; then
  /etc/rc.d/rc.iface_lo stop
fi

# Stop PCMCIA subsystem:
if [ -x /etc/rc.d/rc.pcmcia ]; then
  /etc/rc.d/rc.pcmcia stop
fi

# Stop IrDA daemon:
if [ -x /etc/rc.d/rc.irda ]; then
  /etc/rc.d/rc.irda stop
fi

# Stop Bluetooth daemon:
if [ -x /etc/rc.d/rc.bluez ]; then
  /etc/rc.d/rc.bluez stop
fi

# Save the random seed between reboots:
RANDOM_SEED=/etc/random-seed
POOLFILE=/proc/sys/kernel/random/poolsize

msg "Saving random seed (from /dev/urandom) in $RANDOM_SEED."
[ -r $POOLFILE ] && bytes="$(cat $POOLFILE)" || bytes=512;
dd if=/dev/urandom of="$RANDOM_SEED" count=1 bs="$bytes" 2> /dev/null
chmod 600 $RANDOM_SEED

# Stop LVM2 (Logical Volume Manager version 2):
#
# See the backup directory:
if [ -r /etc/lvm/lvm.conf ]; then
  BACKUP_DIR="$(awk '/backup_dir/ && !/^#/' /etc/lvm/lvm.conf | awk -F '["]' '{ print $2 }')"
else  # This is the default directory:
  BACKUP_DIR=/etc/lvm/backup
fi
# Check the backup directory:
if [ -d "$BACKUP_DIR" ]; then
  msg "Stopping LVM volume groups..."
  vgchange -an --ignorelockingfailure > /dev/null 2>&1
fi

msg "Sending the TERM signal to all process..."
send_signal TERM
sleep 7
msg "Sending the KILL signal to all process..."
send_signal KILL
sleep 3

# Flush file system buffers:
sync

# Disable swap partition(s):
if [ -f /etc/rc.d/rc.swap ]; then
  sh /etc/rc.d/rc.swap stop
fi

msg "Unmounting local and network filesystems:"
umount -v -a -t nodevtmpfs,noproc,nosysfs

if [ -L /dev/root ] && [ -e /dev/root ]; then
  msg "Setting the root filesystem in read-only mode:"
  blockdev -v --setro /dev/root
  if [ ! $? -eq 0 ]; then
    remount_ro
  fi
else
  remount_ro
fi

# Waits for process to change the state, specially on SMP machines:
wait