#!/bin/bash
#
#       /etc/init.d/nmon
#
# description: nmon init script
#
# Version: 1.0 (2013/06/17)
# Author: Uwe Haller
### END INIT INFO

NMON=/usr/bin/nmon
LOGDIR=/var/log/nmon
PIDFILE=/var/run/nmon.pid

if [ ! -d $LOGDIR/old ]; then
  # old for logrotated
  mkdir -p $LOGDIR/old
  chown root:root $LOGDIR
  chmod -R 755 $LOGDIR
fi

if [ ! -e $NMON ]; then
  exit 5
fi

# collect NMON data every INTERVAL seconds
INTERVAL=30

# just use the plain hostname for the filename, logrotate will rename each day
FILENAME=`hostname`.nmon


. /etc/rc.status

rc_reset

start() {
  if [ -f $PIDFILE ]; then
   echo -e "Already running!" 
   rc_status -v
   return 0;
  else
    $NMON -F $FILENAME -T -s 30 -c 3000 -m $LOGDIR -p > $PIDFILE
    # 30 seconds between samples, 3000 samples (~25 hours)
    # just assume nmon started ok; exectue true so the output is correct
    echo -e "Starting nmon: "
    touch /var/lock/subsys/nmon
    rc_status -v
    return 0
  fi
}

stop() {
  if [ -f $PIDFILE ]; then
    echo -e "Shutting down nmon: " ;
    kill -s USR2 `cat /var/run/nmon.pid` 2> /dev/null
  else
    echo -e "Shutting down nmon: " 
    killall -s USR2 $NMON 2> /dev/null
  fi
  
  rm -f /var/lock/subsys/nmon
  rm -f $PIDFILE
  
  rc_status -v
  return 0
}

case "$1" in
  start)
    start
    $0 status
    ;;
  stop)
    stop
    $0 status
    ;;
  restart)
    stop
    start
    ;;
  status)
    echo -n "Checking for service nmon"
        ## Check status with checkproc(8), if process is running
        ## checkproc will return with exit status 0.

        # Return value is slightly different for the status command:
        # 0 - service up and running
        # 1 - service dead, but /var/run/  pid  file exists
        # 2 - service dead, but /var/lock/ lock file exists
        # 3 - service not running (unused)
        # 4 - service status unknown :-(
        # 5--199 reserved (5--99 LSB, 100--149 distro, 150--199 appl.)

        # NOTE: checkproc returns LSB compliant status values.
        checkproc /usr/bin/nmon
        # NOTE: rc_status knows that we called this init script with
        # "status" option and adapts its messages accordingly.
        rc_status -v
    ;;
  *)
    echo "Usage: nmon {start|stop|restart|status}"
    exit 1
    ;;
esac

rc_exit