#!/bin/bash
#
# tomcat5      This shell script takes care of starting and stopping Tomcat
#
# chkconfig: - 80 20
#
### BEGIN INIT INFO
# Provides: tomcat5
# Required-Start: $network $syslog
# Required-Stop: $network $syslog
# Default-Start: 2 3 4 5
# Default-Stop: 0 1 6
# Description: Release implementation for Servlet 2.4 and JSP 2.0
# Short-Description: start and stop tomcat
### END INIT INFO
#
# - originally written by Henri Gomez, Keith Irwin, and Nicolas Mailhot
# - heavily rewritten by Deepak Bhole and Jason Corley
#

if [ -r /lib/lsb/init-functions ]; then
    . /lib/lsb/init-functions
else
    exit 1
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/tomcat5/tomcat5.conf"
if [ -r "$TOMCAT_CFG" ]; then
    . ${TOMCAT_CFG}
fi

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

if [ -z "${CATALINA_BASE}" ]; then
    CATALINA_BASE="${CATALINA_HOME}"
fi

# Define which connector port to use
CONNECTOR_PORT="${CONNECTOR_PORT:-8080}"

# Path to the tomcat launch script
TOMCAT_SCRIPT="/usr/bin/dtomcat5"

# Path to the script that will refresh jar symlinks on startup
TOMCAT_RELINK_SCRIPT="${CATALINA_HOME}/bin/relink"

# 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/tomcat5/catalina.out}"

RETVAL="0"

function checkpid() {
    local i
    for i in $* ; do
        if [ -d "/proc/${i}" ]; then
            return 0
        fi
    done
    return 1
}

# Look for open ports, as the function name might imply
function findFreePorts() {
    local isSet1="false"
    local isSet2="false"
    local isSet3="false"
    local lower="8000"
    randomPort1="0"
    randomPort2="0"
    randomPort3="0"
    local -a listeners="( $(
                        netstat -ntl | \
                        awk '/^tcp/ {gsub("(.)*:", "", $4); print $4}'
                    ) )"
    while [ "$isSet1" = "false" ] || \
          [ "$isSet2" = "false" ] || \
          [ "$isSet3" = "false" ]; do
        let port="${lower}+${RANDOM:0:4}"
        if [ -z `expr " ${listeners[*]} " : ".*\( $port \).*"` ]; then
            if [ "$isSet1" = "false" ]; then
                export randomPort1="$port"
                isSet1="true"
            elif [ "$isSet2" = "false" ]; then
                export randomPort2="$port"
                isSet2="true"
            elif [ "$isSet3" = "false" ]; then
                export randomPort3="$port"
                isSet3="true"
            fi
        fi
    done
}

function makeHomeDir() {
    SAVE_UMASK=$(umask)
    umask 022
    if [ ! -d "${CATALINA_HOME}" ]; then
        echo "${CATALINA_HOME} does not exist, creating"
        if [ ! -d "/var/lib/${NAME}" ]; then
            mkdir -p /var/lib/${NAME}
            cp -pR /var/lib/tomcat5/* /var/lib/${NAME}
        fi
        mkdir -p ${CATALINA_HOME} ${CATALINA_HOME}/conf /var/cache/${NAME}/temp \
            /var/cache/${NAME}/work /var/log/${NAME}
        for i in temp work; do
            ln -fs /var/cache/${NAME}/${i} ${CATALINA_HOME}/${i}
        done
        for i in common server shared webapps; do
            ln -fs /var/lib/${NAME}/${i} ${CATALINA_HOME}/${i}
        done
        ln -fs /var/log/${NAME} ${CATALINA_HOME}/logs
        cp -pLR /etc/tomcat5/* ${CATALINA_HOME}/conf/
        cp -pLR /usr/share/tomcat5/bin ${CATALINA_HOME}
        cp -pLR /var/cache/tomcat5/work/* ${CATALINA_HOME}/work/
        chown ${TOMCAT_USER}:${TOMCAT_USER} /var/log/${NAME}
    fi
    umask ${SAVE_UMASK}
}

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} $CATALINA_PID
    if [ "$CATALINA_HOME" != "/usr/share/tomcat5" ]; then
        # Create a tomcat directory if it doesn't exist
        makeHomeDir
        # If CATALINA_HOME doesn't exist modify port number so that
        # multiple instances don't interfere with each other
        findFreePorts
        sed -i -e "s/8005/${randomPort1}/g" -e "s/8080/${CONNECTOR_PORT}/g" \
            -e "s/8009/${randomPort2}/g" -e "s/8443/${randomPort3}/g" \
            ${CATALINA_HOME}/conf/server.xml
    fi
    touch $TOMCAT_LOG
    chown ${TOMCAT_USER}:${TOMCAT_USER} $TOMCAT_LOG
    if [ "$RELINK" = "yes" ]; then
        $TOMCAT_RELINK_SCRIPT
    fi
    $SU - $TOMCAT_USER -c "$TOMCAT_SCRIPT start" >> $TOMCAT_LOG 2>&1
    RETVAL="$?"
    if [ "$RETVAL" -eq 0 ]; then 
        log_success_msg
        touch /var/lock/subsys/${NAME}
    else
        log_failure_msg
    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_USER} -G ${TOMCAT_USER} java)"
        if [ -n "$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" >> $TOMCAT_LOG 2>&1
        RETVAL="$?"
        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 $kpid
                fi
                if [ "$STOP_VERBOSE" = "true" -a "$count" -gt "0" ]; then
                    echo -n -e "\n"
                fi
                log_success_msg
            else
                log_failure_msg
            fi
            rm -f /var/lock/subsys/$NAME /var/run/$NAME.pid
        else
            log_failure_msg
        fi
    else
        log_failure_msg
    fi
    #echo
}

# See how we were called.
case "$1" in
    start)
        parseOptions
        start
        ;;
    stop)
        parseOptions
        stop
        ;;
    restart)
        parseOptions
        stop
        sleep 2    
        start
        ;;
    condrestart|try-restart)
        if [ -f "/var/run/${NAME}.pid" ]; then
            parseOptions
            stop
            start
        fi
        ;;
    reload)
        RETVAL="3"
        ;;
    force-reload)
        if [ -f "/var/run/${NAME}.pid" ]; then
            stop
            start
        fi
        ;;
    status)
        status
        ;;
    version)
        parseOptions
        "${JAVA_HOME}/bin/java" \
            -classpath "${CATALINA_HOME}/server/lib/[tomcat5][catalina].jar" \
            org.apache.catalina.util.ServerInfo
        ;;
    *)
        echo "Usage: $TOMCAT_PROG {start|stop|restart|condrestart|try-restart|reload|force-reload|status|version}"
        exit 1
esac

exit $RETVAL