#!/bin/bash
#
# tomcat        This shell script starts and stops Tomcat.
#               Based on CentOS startup script for Tomcat 5.0 but
#               has been modified for Tomcat 5.5
#
# chkconfig: - 80 20
#
### BEGIN INIT INFO
# Provides: tomcat
# Required-Start: $network $syslog
# Required-Stop: $network $syslog
# Default-Start:
# Default-Stop:
# Description: tomcat start/stop (Tomcat 5.5 apache build with Sun Java 1.4 JDK)
# process name: tomcat
# pid file:     /var/run/tomcat.pid
# config:       /etc/opt/tomcat/tomcat.conf
### END INIT INFO


# Source the function library
if [ -r "/etc/rc.d/init.d/functions" ]; then
        . /etc/rc.d/init.d/functions
fi

NAME="$(basename $0)"
unset ISBOOT
if [ "${NAME:0:1}" = "S" -o "${NAME:0:1}" = "K" ]; then
    NAME="${NAME:3}"
    ISBOOT="1"
fi

# For SELinux we need to use 'runuser' not 'su'
if [ -x "/sbin/runuser" ]; then
    SU="/sbin/runuser"
else
    SU="su"
fi

# Get the tomcat config (use this for environment specific settings)
TOMCAT_CFG="/etc/opt/tomcat/tomcat.conf"
if [ -r "$TOMCAT_CFG" ]; then
    . ${TOMCAT_CFG}
fi

# Get instance specific config file
if [ -r "/etc/sysconfig/${NAME}" ]; then
    . /etc/sysconfig/${NAME}
fi

# Path to the tomcat launch script
TOMCAT_SCRIPT="/opt/tomcat/bin/catalina.sh"

# Tomcat program name
TOMCAT_PROG="$NAME"

# Define the tomcat username
TOMCAT_USER="${TOMCAT_USER:-tomcat}"

# Define the tomcat log file
TOMCAT_LOG="${TOMCAT_LOG:-/var/log/tomcat/catalina.out}"

RETVAL="0"

# remove when the RHEL and FC daemon functions converge
# (pulled from /etc/rc.d/init.d/functions)
#function checkpid() {
#    local i
#    for i in $* ; do
#        if [ -d "/proc/${i}" ]; then
#            return 0
#        fi
#    done
#    return 1
#}

function parseOptions() {
    options=""
    options="$options $(
                 awk '!/^#/ && !/^$/ { ORS=" "; print "export ", $0, ";" }' \
                 $TOMCAT_CFG
             )"
    if [ -r "/etc/sysconfig/${NAME}" ]; then
        options="$options $(
                     awk '!/^#/ && !/^$/ { ORS=" ";
                                           print "export ", $0, ";" }' \
                     /etc/sysconfig/${NAME}
                 )"
   fi
    TOMCAT_SCRIPT="$options $TOMCAT_SCRIPT"
}

# See how we were called.
function start() {
    echo -n "Starting ${TOMCAT_PROG}: "
    if [ -f "/var/lock/subsys/${NAME}" ] ; then
        if [ -f "/var/run/${NAME}.pid" ]; then
            read kpid < /var/run/${NAME}.pid
                if checkpid $kpid 2>&1; then
                    echo "$NAME process already running"
                        return -1
                    else
                        echo "lock file found but no process running for"
                        echo "pid $kpid, continuing"
                fi
        fi
    fi
    export CATALINA_PID="/var/run/${NAME}.pid"
    touch $CATALINA_PID
    chown ${TOMCAT_USER}:${TOMCAT_USER} $CATALINA_PID
    #$SU - $TOMCAT_USER -c "$TOMCAT_SCRIPT start" >> $TOMCAT_LOG 2>&1
    daemon --user $TOMCAT_USER $TOMCAT_SCRIPT start >> $TOMCAT_LOG 2>&1
    RETVAL="$?"
    if [ "$RETVAL" -eq 0 ]; then
        echo_success
        touch /var/lock/subsys/${NAME}
    else
        echo_failure
    fi
    echo
    return $RETVAL
}

function status() {
    RETVAL="1"
    if [ -f "/var/run/${NAME}.pid" ]; then
        read kpid < /var/run/${NAME}.pid
        if checkpid $kpid 2>&1; then
            echo "$0 is already running (${kpid})"
            RETVAL="0"
        else
            echo "lock file found but no process running for pid $kpid"
        fi
    else
        pid="$(pgrep -u tomcat java)"
        if [ -n "$pid" ]; then
            echo "$0 running (${pid}) but no PID file exists"
            RETVAL="0"
        else
            echo "$0 is stopped"
        fi
    fi
    return $RETVAL
}

function stop() {
    local STOP_VERBOSE="false"
    echo -n "Stopping $TOMCAT_PROG: "
    if [ -f "/var/lock/subsys/${NAME}" ]; then
        #$SU - $TOMCAT_USER -c "$TOMCAT_SCRIPT stop" >> $TOMCAT_LOG 2>&1
        daemon --user $TOMCAT_USER $TOMCAT_SCRIPT stop >> $TOMCAT_LOG 2>&1
        RETVAL="$?"
        if [ "$RETVAL" -eq "0" ]; then
            count="0"
            if [ -f "/var/run/${NAME}.pid" ]; then
                read kpid < /var/run/${NAME}.pid
                until [ "$(ps --pid $kpid | grep -c $kpid)" -eq "0" ] || \
                      [ "$count" -gt "$SHUTDOWN_WAIT" ]; do
                    if [ "$STOP_VERBOSE" = "true" ]; then
                        echo -n -e "\nwaiting for processes $kpid to exit"
                    fi
                    sleep 1
                    let count="${count}+1"
                done
                if [ "$count" -gt "$SHUTDOWN_WAIT" ]; then
                    if [ "$STOP_VERBOSE" = "true" ]; then
                        echo -n -e "\nkilling processes which didn't stop"
                        echo -n -e "after "
                        echo -n "$SHUTDOWN_WAIT seconds"
                    fi
                    kill -9 $kpid
                fi
                echo_success
                if [ "$count" -gt "0" ]; then
                    echo -n -e "\n"
                fi
            fi
            rm -f /var/lock/subsys/$NAME /var/run/$NAME.pid
        else
            echo_failure
        fi
    fi
}


# See how we were called.
case "$1" in
    start)
        parseOptions
        start
        ;;
    stop)
        parseOptions
        stop
        ;;
    restart)
        parseOptions
        stop
        sleep 2
        start
        ;;
    condrestart)
        if [ -f "/var/run/${NAME}.pid" ]; then
            parseOptions
            stop
            start
        fi
        ;;
    status)
        status
        ;;
    version)
        parseOptions
        "${JAVA_HOME}/bin/java" \
            -classpath "${CATALINA_HOME}/server/lib/catalina.jar" \
            org.apache.catalina.util.ServerInfo
        ;;
    *)
        echo "Usage: $TOMCAT_PROG {start|stop|restart|condrestart|status|version}"
        exit 1
esac

exit $RETVAL