source: drbl-hadoop-0.1/drbl-hadoop-mount-disk @ 87

#! /bin/sh
#
# skeleton  example file to build /etc/init.d/ scripts.
#    This file should be used to construct scripts for /etc/init.d.
#
#    Written by Miquel van Smoorenburg <miquels@cistron.nl>.
#    Modified for Debian
#    by Ian Murdock <imurdock@gnu.ai.mit.edu>.
#               Further changes by Javier Fernandez-Sanguino <jfs@debian.org>
#
# Version:  @(#)skeleton  1.9  26-Feb-2001  miquels@cistron.nl
#
### BEGIN INIT INFO
# Provides:          drbl-hadoop-mount-disk
# Required-Start:    $network $local_fs
# Required-Stop:
# Should-Start:      $named
# Should-Stop:
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: mount local disk for Hadoop datanode daemon
### END INIT INFO

set -e

DISK=/dev/sda1
MOUNT=/var/lib/hadoop/cache/hadoop/dfs/data

if [ -f /etc/default/drbl-hadoop ] ; then
  . /etc/default/drbl-hadoop
fi

PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin
NAME=drbl-hadoop-mount-disk
DESC="mount local disk for Hadoop datanode daemon"

PIDFILE=/var/run/drbl-hadoop.pid
DODTIME=3                   # Time to wait for the server to die, in seconds
                            # If this value is set too low you might not
                            # let some servers to die gracefully and
                            # 'restart' will not work

start() {
  if [ ! -x $MOUNT ]; then
    mkdir -p $MOUNT
    chown hadoop:hadoop $MOUNT
  fi
  mount $DISK $MOUNT
  touch $PIDFILE
}

stop() {
  umount $DISK
  rm -f $PIDFILE
}


case "$1" in
  start)
        echo -n "Starting $DESC: "
        start
        if [ -f $PIDFILE ] ; then
            echo "OK."
        else
            echo "ERROR."
        fi
  ;;
  stop)
        echo -n "Stopping $DESC: "
        stop
        if [ ! -f $PIDFILE ] ; then
            echo "OK."
        else
            echo "ERROR."
        fi
  ;;
  force-reload)
  if [ -f $PIDFILE ] ; then
    $0 restart
  fi
  ;;
  restart)
        echo -n "Restarting $DESC: "
        if [ -f $PIDFILE ] ; then 
    stop 
  fi
        [ -n "$DODTIME" ] && sleep $DODTIME
        $0 start
  ;;
  status)
    echo -n "$DISK is "
    if [ -f $PIDFILE ] ;  then
        echo "mounted"
    else
        echo "not mounted."
        exit 1
    fi
    ;;
  *)
  N=/etc/init.d/$NAME
  echo "Usage: $N {start|stop|restart|force-reload|status}" >&2
  exit 1
  ;;
esac

exit 0