On 07/19/2011 05:59 PM, Fulko Hew wrote:
False Hum best is to provide you with example which daemon do you maintain I can convert it for you and provide it to you as an example anyway here's an example of a systemd unit that I converted sometime ago for a know application named tomcat6 and I'll leave readers to be the judge of that what is harder to understand the native systemd unit or the legacy sysv init script... First the converted unit file # cat /lib/systemd/system/tomcat6.service [Unit] Description=Apache Tomcat Web Applications Server After=systlog.target network.target [Service] Type=forking EnvironmentFile=-/etc/sysconfig/tomcat6 ExecStart=/usr/sbin/tomcat6 start ExecStop=/usr/sbin/tomcat6 stop [Install] WantedBy=multi-user.target Now the legacy sysv init script that everybody seem to love and cheerish so much... # cat /etc/rc.d/init.d/tomcat6 #!/bin/bash # # tomcat6 This shell script takes care of starting and stopping Tomcat # # chkconfig: - 80 20 # ### BEGIN INIT INFO # Provides: tomcat6 # Required-Start: $network $syslog # Required-Stop: $network $syslog # Default-Start: # Default-Stop: # Description: Release implementation for Servlet 2.5 and JSP 2.1 # Short-Description: start and stop tomcat ### END INIT INFO # # - originally written by Henri Gomez, Keith Irwin, and Nicolas Mailhot # - heavily rewritten by Deepak Bhole and Jason Corley # ## Source function library. #. /etc/rc.d/init.d/functions # Source LSB function library. if [ -r /lib/lsb/init-functions ]; then . /lib/lsb/init-functions else exit 1 fi DISTRIB_ID=`lsb_release -i -s 2>/dev/null` NAME="$(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 -s /bin/sh" else SU="/bin/su -s /bin/sh" fi # Get the tomcat config (use this for environment specific settings) TOMCAT_CFG="/etc/tomcat6/tomcat6.conf" if [ -r "$TOMCAT_CFG" ]; then . $TOMCAT_CFG fi # Get instance specific config file if [ -r "/etc/sysconfig/${NAME}" ]; then . /etc/sysconfig/${NAME} fi # Define which connector port to use CONNECTOR_PORT="${CONNECTOR_PORT:-8080}" # Path to the tomcat launch script TOMCAT_SCRIPT="/usr/sbin/tomcat6" # Tomcat program name TOMCAT_PROG="${NAME}" # Define the tomcat username TOMCAT_USER="${TOMCAT_USER:-tomcat}" # Define the tomcat log file TOMCAT_LOG="${TOMCAT_LOG:-${CATALINA_HOME}/logs/catalina.out}" RETVAL="0" # 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() { if [ ! -d "$CATALINA_HOME" ]; then echo "$CATALINA_HOME does not exist, creating" if [ ! -d "/usr/share/${NAME}" ]; then mkdir /usr/share/${NAME} cp -pLR /usr/share/tomcat6/* /usr/share/${NAME} fi mkdir -p /var/log/${NAME} \ /var/cache/${NAME} \ /var/tmp/${NAME} ln -fs /var/cache/${NAME} ${CATALINA_HOME}/work ln -fs /var/tmp/${NAME} ${CATALINA_HOME}/temp cp -pLR /usr/share/${NAME}/bin $CATALINA_HOME cp -pLR /usr/share/${NAME}/conf $CATALINA_HOME ln -fs /usr/share/java/tomcat6 ${CATALINA_HOME}/lib ln -fs /usr/share/tomcat6/webapps ${CATALINA_HOME}/webapps chown ${TOMCAT_USER}:${TOMCAT_USER} /var/log/${NAME} fi } function parseOptions() { options="" options="$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() { echo -n "Starting ${TOMCAT_PROG}: " if [ "$RETVAL" != "0" ]; then log_failure_msg return fi if [ -f "/var/lock/subsys/${NAME}" ]; then if [ -f "/var/run/${NAME}.pid" ]; then read kpid < /var/run/${NAME}.pid # if checkpid $kpid 2>&1; then if [ -d "/proc/${kpid}" ]; then log_success_msg if [ "$DISTRIB_ID" = "MandrivaLinux" ]; then echo fi return 0 fi fi fi # fix permissions on the log and pid files export CATALINA_PID="/var/run/${NAME}.pid" touch $CATALINA_PID 2>&1 || RETVAL="4" if [ "$RETVAL" -eq "0" -a "$?" -eq "0" ]; then chown ${TOMCAT_USER}:${TOMCAT_USER} $CATALINA_PID fi [ "$RETVAL" -eq "0" ] && touch $TOMCAT_LOG 2>&1 || RETVAL="4" if [ "$RETVAL" -eq "0" -a "$?" -eq "0" ]; then chown ${TOMCAT_USER}:${TOMCAT_USER} $TOMCAT_LOG fi if [ "$CATALINA_HOME" != "/usr/share/tomcat6" -a "$RETVAL" -eq "0" ]; then # Create a tomcat directory if it doesn't exist makeHomeDir # If CATALINA_HOME doesn't exist modify port number so that # multiple instances don't interfere with each other findFreePorts sed -i -e "s/8005/${randomPort1}/g" -e "s/8080/${CONNECTOR_PORT}/g" \ -e "s/8009/${randomPort2}/g" -e "s/8443/${randomPort3}/g" \ ${CATALINA_HOME}/conf/server.xml fi parseOptions if [ "$RETVAL" -eq "0" -a "$SECURITY_MANAGER" = "true" ]; then $SU - $TOMCAT_USER -c "${TOMCAT_SCRIPT} start-security" \ >> ${CATALINA_HOME}/logs/initd.log 2>&1 || RETVAL="4" else [ "$RETVAL" -eq "0" ] && $SU - $TOMCAT_USER -c "${TOMCAT_SCRIPT} start" >> ${CATALINA_HOME}/logs/initd.log 2>&1 || RETVAL="4" fi if [ "$RETVAL" -eq "0" ]; then log_success_msg touch /var/lock/subsys/${NAME} else log_failure_msg "Error code ${RETVAL}" fi if [ "$DISTRIB_ID" = "MandrivaLinux" ]; then echo fi } function stop() { echo -n "Stopping ${TOMCAT_PROG}: " if [ -f "/var/lock/subsys/${NAME}" ]; then parseOptions if [ "$RETVAL" -eq "0" ]; then touch /var/lock/subsys/${NAME} 2>&1 || RETVAL="4" [ "$RETVAL" -eq "0" ] && $SU - $TOMCAT_USER -c "${TOMCAT_SCRIPT} stop" >> ${CATALINA_HOME}/logs/initd.log 2>&1 || RETVAL="4" fi if [ "$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 "$SHUTDOWN_WAIT" ]; do if [ "$SHUTDOWN_VERBOSE" = "true" ]; then echo "waiting for processes $kpid to exit" fi sleep 1 let count="${count}+1" done if [ "$count" -gt "$SHUTDOWN_WAIT" ]; then if [ "$SHUTDOWN_VERBOSE" = "true" ]; then log_warning_msg "killing processes which did not stop after ${SHUTDOWN_WAIT} seconds" fi kill -9 $kpid fi log_success_msg fi rm -f /var/lock/subsys/${NAME} /var/run/${NAME}.pid else log_failure_msg RETVAL="4" fi else log_success_msg RETVAL="0" fi if [ "$DISTRIB_ID" = "MandrivaLinux" ]; then echo fi } function usage() { echo "Usage: $0 {start|stop|restart|condrestart|try-restart|reload|force-reload|status|version}" RETVAL="2" } # See how we were called. RETVAL="0" case "$1" in start) start ;; stop) stop ;; restart) stop start ;; condrestart|try-restart) if [ -f "/var/run/${NAME}.pid" ]; then stop start fi ;; reload) RETVAL="3" ;; force-reload) if [ -f "/var/run/${NAME}.pid" ]; then stop start fi ;; status) if [ -f "/var/run/${NAME}.pid" ]; then read kpid < /var/run/${NAME}.pid if [ -d "/proc/${kpid}" ]; then log_success_msg "${NAME} (pid ${kpid}) is running..." RETVAL="0" else # The pid file exists but the process is not running log_warning_msg "PID file exists, but process is not running" RETVAL="1" fi else pid="$(/usr/bin/pgrep -d , -u ${TOMCAT_USER} -G ${TOMCAT_USER} java)" if [ -z "$pid" ]; then # status ${NAME} # RETVAL="$?" log_success_msg "${NAME} is stopped" RETVAL="3" else log_success_msg "${NAME} (pid $pid) is running..." RETVAL="0" fi fi if [ -f /var/lock/subsys/${NAME} ]; then pid="$(/usr/bin/pgrep -d , -u ${TOMCAT_USER} -G ${TOMCAT_USER} java)" # The lockfile exists but the process is not running if [ -z "$pid" ]; then log_failure_msg "${NAME} lockfile exists but process is not running" RETVAL="2" fi fi ;; version) ${TOMCAT_SCRIPT} version ;; *) usage ;; esac exit $RETVAL |
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