#!/bin/sh
#
# snf-server. Starts and stops the SNFServer daemon (OpenBSD).
#
# Author:  Alban Deniz
#
# Copyright (C) 2008 ARM Research Labs, LLC.
# See www.armresearch.com for the copyright terms.
#

# Directory to run in.
runDir=PREFIX/share/PACKAGE_NAME

# Define mode files.
debugModeFile=$runDir/debug_mode
productionModeFile=$runDir/production_mode

# Set debug mode flag.
if [ -f $debugModeFile ]
then
    debugMode=true
fi

# Debug output file.
debugOutputFile=/var/log/PACKAGE_NAME/debug.log

# ktrace output file.
ktraceOutputFile=/var/log/PACKAGE_NAME/ktrace.out

# Location of installation.
installedDir="PREFIX"

# Location of programs.
dir="$installedDir/sbin"

# Name of config file.
configFile="CONFFILE"

# Name of daemon.
debugProg="SNFDebugServer"
productionProg="SNFServer"

# Name of client.
clientProg="SNFClient"

# Name of user to run as.
userName="snfuser"

#
# Function to create the mode file.
#
createModeFile()
{
    fileName=$1

    # Remove any existing mode files.
    rm -f $productionModeFile $debugModeFile $fileName
    (
	echo "PACKAGE_NAME mode file"
	echo
	echo "This file specifies whether PACKAGE_NAME is configured to run in"
	echo "production mode or debug mode.  If the name of this file is"
        echo "'production_mode', then PACKAGE_NAME is configured to run in"
        echo "production mode.  If the name is 'debug_mode', then PACKAGE_NAME is"
        echo "configured to run in debug mode."
	echo
	echo "To run in debug mode:"
	echo
	echo "    1) Run 'PACKAGE_NAME debug_mode'"
	echo
	echo "    2) Run 'PACKAGE_NAME restart' (if PACKAGE_NAME is already running),"
	echo "       or 'PACKAGE_NAME start' (to start PACKAGE_NAME)"
	echo
	echo "To run in production mode:"
	echo
	echo "    1) Run 'PACKAGE_NAME production_mode'"
	echo
	echo "    2) Run 'PACKAGE_NAME restart' (if PACKAGE_NAME is already running),"
	echo "       or 'PACKAGE_NAME start' (to start PACKAGE_NAME)"
	echo
	echo "By default, PACKAGE_NAME is configured to run in production mode."
	) > $fileName

}

start(){
    echo -n " $productionProg "

    for prog in $productionProg $debugProg
    do
        SNFPID=`ps -axww | grep $dir/$prog | grep -v grep | awk '{print $1}'`
        if [ -n "$SNFPID" ] ; then
	    echo "already running"
	    return 1
        fi
    done

    # Start.
    if [ $debugMode ]
    then

	# Enable core dumps and start with ktrace and output redirected.
        (ulimit -c unlimited; \
            su -m $userName -c \
            "echo Starting $dir/$debugProg on $(date) >> $debugOutputFile"; \
            cd PREFIX/share/PACKAGE_NAME; \
	    su -m $userName -c \
            "ktrace -f $ktraceOutputFile $dir/$debugProg $configFile >> $debugOutputFile 2>&1 &")

    else

	(cd PREFIX/share/PACKAGE_NAME; \
            su -m $userName -c "$dir/$productionProg $configFile > /dev/null 2>&1 &" \
	    > /dev/null 2>&1)
    fi

    RETVAL=$?
    if [ $RETVAL -eq 0 ]; then 
	$dir/$clientProg -status.second > /dev/null 2>&1
	RETVAL=$?
    fi
    if [ $RETVAL -eq 0 ]; then
	echo "started "
    else
	echo "failed "
    fi
    return $RETVAL
}

getPID(){
    ps -axww | grep $1 | grep -v grep | awk '{print $1}'
}

stopFunction(){
    echo -n " $prog "
    DEBUG_SNFPID=`getPID $dir/$debugProg`
    PRODUCTION_SNFPID=`getPID $dir/$productionProg`
    if [ -n "$DEBUG_SNFPID" ] || [ -n "$PRODUCTION_SNFPID" ]; then
	$dir/$clientProg -shutdown > /dev/null 2>&1
	sleep 10

        # Check that the programs are no longer running.
        RETVAL=0
        for prog in $debugProg $productionProg
        do

            SNFPID=`getPID $dir/$prog`
	    if [ -n "$SNFPID" ]; then
	        kill $SNFPID
	        RETVAL=$(($RETVAL+$?))
	    fi
        done
        echo -n "stopped"
    else
	echo -n "not running"
	RETVAL=1
    fi

    echo ""
    return $RETVAL
}

restart(){
    stopFunction
    start
}

status(){
    # Check whether the programs are running.
    RETVAL=0
    for progName in $debugProg $productionProg
    do

        SNFPID=`getPID $dir/$progName`
        if [ -n "$SNFPID" ]; then
	    echo "$progName (pid $SNFPID) is running"
            RETVAL=$(($RETVAL+1))
	else
	    echo "$progName is not running"
        fi
    done
    return 0
}

# See how we were called.
case "$1" in
    start)
	start
	;;
    stop)
	stopFunction
	;;
    status)
	status
	;;
    restart)
	restart
	;;
    debug_mode)
  	#
  	# Remove any mode flags, and create the debug_mode file.
  	#
  	echo "Switching to debug mode"
  	createModeFile $debugModeFile
  	;;
    production_mode)
  	#
  	# Remove any mode flags, and create the debug_mode file.
  	#
  	echo "Switching to production mode"
  	createModeFile $productionModeFile
  	;;
    *)
	echo "Usage: $0 {start|stop|status|restart|production_mode|debug_mode}"
	exit 1
esac

exit $?