Starting Services at boot time in slackware

 A reminder...

Any networking services should be handles by rc.init2 and simply requires making the appropriate script in /etc/rc.d executable.

But if we add our own custom script, then we can add the following to rc.local

# Start MCR Monitor
if [ -x /etc/rc.d/rc.mcr_monitor ]; then
        echo "Starting MCR Monitor..."
        . /etc/rc.d/rc.mcr_monitor start
fi

similarly, we can create rc.local_shutdown with the same permissions as rc.local and add the following;

# Stop MCR Monitor
if [ -x /etc/rc.d/rc.mcr_monitor ]; then
        echo "Stopping MCR Monitor..."
        . /etc/rc.d/rc.mcr_monitor stop
fi

We could add the above to /etc/rc.M and /etc/rc.K but I prefer the former.

Example of a generic control script is as below;

#
# run control file for NAME
#
# User options:
#
# USER: set an alternative uid (default: www)
# GROUP: set an alternative group (default: www)
#
 
USER=root
GROUP=root
PRGNAM=mcr_monitor
BIN=/usr/bin/mcr_monitor
#CONF=/etc/prog.conf
#ARGS=-c $CONF -u $USER -g $GROUP
PID=/var/run/mcr_monitor/mcr_monitor.pid
 
magicd_start()
{
  if [ ! -r $CONF ]; then
    echo "No configuration file available. Aborting"
    exit 1
  fi
 
  if [ -s $PID ]; then
    echo "$PRGNAM is already running: $(cat $PID)"
    exit 1
  fi
 
  if [ -x $BIN ]; then
    echo "Starting $PRGNAM: $BIN $ARGS"
    $BIN
  fi
}
 
magicd_stop()
{
  if [ -s $PID ]; then 
    kill -QUIT $(cat $PID)
  fi
}
 
magicd_restart()
{
  magicd_stop
  sleep 3         # NOTE: adjust or remove if possible
  magicd_start
}
 
magicd_status()
{
  if [ -s $PID ]; then
    echo "$PRGNAM is running: $(cat $PID)"
  else
    echo "$PRGNAM does not seem to be running"
  fi
}
 
case $1 in
restart)
        magicd_restart
        ;;
start)
        magicd_start
        ;;
status)
        magicd_status
        ;;
stop)
        magicd_stop
        ;;
*)
        echo "Usage: $0 {restart|start|status|stop}"
        ;;
esac