#!/bin/sh

if [ "$1" = "" ]; then
    echo "Usage: $0 helma.conf"
    exit 1
fi

# Check for existence of needed config file and source it
if [ -r "$1" ]; then
    . "$1"
else
    echo "Can't read config file $1"
    exit 6
fi

# Check for missing files and directories
if [ ! -x $JAVA_BIN ]; then
    echo "Config error: JAVA_BIN $JAVA_BIN not found or not executable"
    exit 5
fi
if [ ! -r $HELMA_INSTALL/launcher.jar ]; then 
    echo "Config error: $HELMA_INSTALL/launcher.jar not found or not readable"
    exit 5
fi
if [ ! -d $HELMA_HOME ]; then 
    echo "Config error: HELMA_HOME $HELMA_HOME not found"
    exit 5
fi

if [ -f $HELMA_PID ]; then

    if [ ! -r $HELMA_PID ]; then
        echo "Pidfile HELMA_PID ${HELMA_PID} not readable."
        exit 2
    fi

    read pid _junk < ${HELMA_PID}
    
    if [ -z "$pid" ]; then
        echo "Pidfile HELMA_PID ${HELMA_PID} contains no pid."
        exit 2
    fi
    
    ps -o pid= $pid > /dev/null

    if [ $? -eq 0 ]; then
        echo 1>&2 "${HELMA_SERVICE} already running? (pid=${pid})."
        exit 2
    fi
fi

touch $HELMA_LOG && chown $HELMA_USER $HELMA_LOG
if [ "$?" -ne "0" ]; then
    echo "Config error: Permission to HELMA_LOG $HELMA_LOG denied"
    exit 4
fi

touch $HELMA_PID && chown $HELMA_USER $HELMA_PID
if [ "$?" -ne "0" ]; then
    echo "Config error: Permission to HELMA_PID $HELMA_PID denied"
    exit 4
fi

args="$JAVA_OPTS -jar $HELMA_INSTALL/launcher.jar -h $HELMA_HOME -f $HELMA_CONFIG/server.properties $HELMA_ARGS"

if [ "`whoami`" = "$HELMA_USER" ]; then
	command="csh -c 'nohup $JAVA_BIN $args >& $HELMA_LOG & echo \$! > $HELMA_PID' > /dev/null"
else
	command="su -m $HELMA_USER -c 'nohup $JAVA_BIN $args >& $HELMA_LOG & echo \$! > $HELMA_PID' > /dev/null"
fi

echo "Starting ${HELMA_SERVICE}."

eval "$command"
return=$?

if [ "`cat $HELMA_PID`" = "" ]; then
    rm $HELMA_PID
fi

if [ $return -ne 0 ]; then
    exit 1
fi

exit 0