#!/bin/bash
#
# This script provides systemd activation of the tomcat service
# To create clones of this service:
# 1) SERVICE_NAME must be defined before calling this script
# 2) Create /etc/sysconfig/${SERVICE_NAME} from /etc/sysconfig/tomcat
# to override tomcat defaults

# SERVICE_NAME is a required value only if the service name is 
# different from 'tomcat'
#
NAME="${SERVICE_NAME:-tomcat}"

#I'll bet this isn't required. 
# unset ISBOOT

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

# Path to the tomcat launch script
TOMCAT_SCRIPT="/usr/sbin/tomcat"
        
# Define the tomcat username
TOMCAT_USER="${TOMCAT_USER:-tomcat}"

# TOMCAT_LOG should be different from catalina.out.
# Usually the below config is all that is necessary
TOMCAT_LOG=/var/log/${NAME}/${NAME}-sysd.log

# Get the tomcat config (use this for environment specific settings)
TOMCAT_CFG="/etc/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

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() {
    # fix permissions on the log and pid files
    export CATALINA_PID="/var/run/${NAME}.pid"
    touch $CATALINA_PID 2>&1 
    if [ "$?" -eq "0" ]; then
      chown ${TOMCAT_USER}:${TOMCAT_USER} $CATALINA_PID
    fi

    touch $TOMCAT_LOG 2>&1 
    if [ "$?" -eq "0" ]; then
      chown ${TOMCAT_USER}:${TOMCAT_USER} $TOMCAT_LOG
    fi

    # if jsvc installed and USE_JSVC=true
    # then start as root and use jsvc to drop privileges
    if [ -x /usr/bin/jsvc ] && [ "$USE_JSVC" = "true" ]; then
      TOMCAT_USER="root"
    fi

    parseOptions  
    if [ "$SECURITY_MANAGER" = "true" ]; then
       $SU - $TOMCAT_USER -c "${TOMCAT_SCRIPT} start-security" >> $TOMCAT_LOG 2>&1 
    else
       $SU - $TOMCAT_USER -c "${TOMCAT_SCRIPT} start" >> $TOMCAT_LOG 2>&1
    fi
}

function stop() {
    # if jsvc installed and USE_JSVC=true
    # then start as root and use jsvc to drop privileges
    if [ -x /usr/bin/jsvc ] && [ "$USE_JSVC" = "true" ]; then
      TOMCAT_USER="root"
    fi

    parseOptions  
    $SU - $TOMCAT_USER -c "${TOMCAT_SCRIPT} stop" >> $TOMCAT_LOG 2>&1
}

# See how we were called.
case "$1" in
    start)
        start
        ;;
    stop)
        stop
        ;;
    restart)
        stop
        start
        ;;
esac