#! /bin/sh -e
#
# /etc/init.d/tomcat -- startup script for the Tomcat servlet engine
#
# Written by Miquel van Smoorenburg <miquels@cistron.nl>.
# Modified for Debian GNU/Linux by Ian Murdock <imurdock@gnu.ai.mit.edu>.
# Modified for Tomcat by Stefan Gybas <sgybas@debian.org>.

### BEGIN INIT INFO
# Provides:          tomcat
# Required-Start:    $local_fs $remote_fs $network
# Required-Stop:     $local_fs $remote_fs $network
# Should-Start:      $named
# Should-Stop:       $named
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: Start Tomcat.
# Description:       Start the Tomcat servlet engine.
### END INIT INFO

set -e

PATH=/bin:/usr/bin:/sbin:/usr/sbin
NAME=tomcat
DESC="Tomcat 6.0 servlet engine"
DAEMON=/usr/bin/$NAME
CATALINA_HOME=/opt/$NAME

# The following variables can be overwritten in /etc/default/tomcat

# Run Tomcat 6.0 as this user ID (default: tomcat)
# Set this to an empty string to prevent Tomcat from starting automatically
TOMCAT_USER=tomcat

# The first existing directory is used for JAVA_HOME (if JAVA_HOME is not
# defined in /etc/default/tomcat)
JDK_DIRS="/opt/java /usr"

# Arguments to pass to the Java virtual machine (JVM)
CATALINA_OPTS="-Xms256M -Xmx512M -XX:MaxPermSize=512M -server"

# Use the Java security manager? (yes/no)
TOMCAT_SECURITY="no"

# End of variables that can be overwritten in /etc/default/tomcat

# overwrite settings from default file
if [ -f /etc/default/tomcat ]; then
        . /etc/default/tomcat
fi

# Java runtime options
JAVA_OPTS="-Djava.endorsed.dirs=$CATALINA_HOME/endorsed"

test -f $DAEMON || exit 0

# Look for the right JVM to use
for jdir in $JDK_DIRS; do
        if [ -d "$jdir" -a -z "${JAVA_HOME}" ]; then
                JAVA_HOME="$jdir"
        fi
done


export JAVA_HOME
export JAVA_OPTS
export CATALINA_OPTS

# Define other required variables
PIDFILE="/var/run/$NAME.pid"
LOGDIR="$CATALINA_HOME/logs"
WEBAPPDIR="$CATALINA_HOME/webapps"
STARTUP_OPTS=""
if [ "$TOMCAT_SECURITY" = "yes" ]; then
        STARTUP_OPTS="-security"
fi

# CATALINA_PID for catalina.sh
export CATALINA_PID="$PIDFILE"

case "$1" in
  start)
        if [ -z "$TOMCAT_USER" ]; then
            echo "Not starting $DESC as configured (TOMCAT_USER is empty in"
            echo "/etc/default/tomcat)."
            exit 0
        fi
        if [ -z "$JAVA_HOME" ]; then
            echo "Could not start $DESC because no Java Development Kit"
            echo "(JDK) was found. Please download and install JDK 1.3 or higher and set"
            echo "JAVA_HOME in /etc/default/tomcat to the JDK's installation directory."
            exit 0
        fi

        echo -n "Starting $DESC using Java from $JAVA_HOME: "

        # Remove dangling webapp symlinks
        for webapp in "$WEBAPPDIR"/*; do
            if [ "$webapp" != "$WEBAPPDIR/*" -a ! -e "$webapp" ]; then
                echo "Removing obsolete webapp $webapp" >>"$LOGDIR/catalina.out"
                rm "$webapp" >> "$LOGDIR/catalina.out" 2>&1 || true
            fi
        done

        # Symlink new webapps from /usr/share/java/webapps
        for webapp in /usr/share/java/webapps/*; do
            if [ -e "$webapp" -a ! -e "$WEBAPPDIR/`basename $webapp`" \
                        -a ! -e "$WEBAPPDIR/`basename $webapp .war`" ]; then
                echo "Symlinking new webapp $webapp" >>"$LOGDIR/catalina.out"
                ln -s "$webapp" "$WEBAPPDIR" || true
            fi
        done

        mkdir -p "$CATALINA_HOME/work/_temp"
        touch "$PIDFILE" "$LOGDIR/catalina.out" || true
        chown --dereference "$TOMCAT_USER" "$PIDFILE" "$LOGDIR" \
            "$LOGDIR/catalina.out" "$CATALINA_HOME/work" \
            "$CATALINA_HOME/temp" || true
        if start-stop-daemon --test --start --pidfile "$PIDFILE" \
                --user $TOMCAT_USER --startas "$DAEMON" >/dev/null; then
                # -p preserves the environment (for $JAVA_HOME etc.)
                # -s is required because tomcat's login shell is /bin/false
                su -p -s /bin/sh $TOMCAT_USER \
                        -c "\"$DAEMON\" start $STARTUP_OPTS" \
                        >>"$LOGDIR/catalina.out" 2>&1
                echo "$NAME."
        else
                echo "(already running)."
        fi
        ;;
  stop)
        echo -n "Stopping $DESC: "
        if start-stop-daemon --test --start --pidfile "$PIDFILE" \
                --user $TOMCAT_USER --startas "$DAEMON" >/dev/null; then
                echo "(not running)."
        else
                su -p $TOMCAT_USER -c "\"$DAEMON\" stop" >/dev/null 2>&1 || true
                # Fallback to kill the JVM process in case stopping did not work
                sleep 1
                start-stop-daemon --stop --oknodo --quiet --pidfile "$PIDFILE" \
                        --user "$TOMCAT_USER"
                rm -f "$PIDFILE"
                echo "$NAME."
        fi
        ;;
  restart|force-reload)
        $0 stop
        sleep 1
        $0 start
        ;;
  *)
        echo "Usage: /etc/init.d/tomcat {start|stop|restart|force-reload}" >&2
        exit 1
        ;;
esac

exit 0