How to Write Standard Startup Script

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#!/bin/bash # testclient - Startup script for testclient # chkconfig: 35 85 15 # description: testclient is your openstack VMS monitor and ovs auto config bot. # processname: testclient # config: /etc/testclient.conf . /etc/rc.d/init.d/functions # NOTE: if you change any OPTIONS here, you get what you pay for: # this script assumes all options are in the config file. CONFIGFILE="/etc/testclient.conf" testCLIENT=/usr/local/bin/testclient testCLIENT_USER=helloworldtest testCLIENT_GROUP=helloworldtest # things from testclient.conf get there by testclient reading it PIDFILEPATH=`awk -F'[:=]' -v IGNORECASE=1 '/^[[:blank:]]*(processManagement\.)?pidFilePath[[:blank:]]*[:=][[:blank:]]*/{print $2}' "$CONFIGFILE" | tr -d "[:blank:]\"'" | aw PIDDIR=`dirname $PIDFILEPATH` LOGFILEPATH=`awk -F'[:=]' -v IGNORECASE=1 '/^[[:blank:]]*(processManagement\.)?logFilePath[[:blank:]]*[:=][[:blank:]]*/{print $2}' "$CONFIGFILE" | tr -d "[:blank:]\"'" | aw LOGDIR=`dirname $LOGFILEPATH` OPTIONS=" -c $CONFIGFILE" start() { # Make sure the default pidfile directory exists if [ ! -d $PIDDIR ]; then install -d -m 0755 -o $testCLIENT_USER -g $testCLIENT_GROUP $PIDDIR fi if [ ! -d $LOGDIR ]; then install -d -m 0755 -o $testCLIENT_USER -g $testCLIENT_GROUP $LOGDIR fi echo -n $"Starting testclient: " daemon --pidfile "$PIDFILEPATH" --user "$testCLIENT_USER" --check $testCLIENT "$testCLIENT $OPTIONS >$LOGFILEPATH 2>&1 &" RETVAL=$? pid=`ps -A x | grep $testCLIENT | grep -v grep | cut -d" " -f1 | head -n 1` if [ -n "$pid" ]; then echo $pid > $PIDFILEPATH fi [ $RETVAL -eq 0 ] && touch /var/lock/subsys/testclient echo return $RETVAL } stop() { echo -n $"Stopping testclient: " testclient_killproc "$PIDFILEPATH" $testCLIENT RETVAL=$? echo [ $RETVAL -eq 0 ] && rm -f /var/lock/subsys/testclient } restart () { stop start } # Send TERM signal to process and wait up to 300 seconds for process to go away. # If process is still alive after 300 seconds, send KILL signal. # Built-in killproc() (found in /etc/init.d/functions) is on certain versions of Linux # where it sleeps for the full $delay seconds if process does not respond fast enough to # the initial TERM signal. testclient_killproc() { local pid_file=$1 local procname=$2 local -i delay=10 local -i duration=1 local pid=`pidofproc -p "${pid_file}" ${procname}` kill -TERM $pid >/dev/null 2>&1 usleep 1000 local -i x=0 while [ $x -le $delay ] && checkpid $pid; do sleep $duration x=$(( $x + $duration)) done kill -KILL $pid >/dev/null 2>&1 usleep 1000 checkpid $pid # returns 0 only if the process exists local RC=$? [ "$RC" -eq 0 ] && failure "${procname} shutdown" || rm -f "${pid_file}"; success "${procname} shutdown" RC=$((! $RC)) # invert return code so we return 0 when process is dead. return $RC } RETVAL=0 case "$1" in start) start ;; stop) stop ;; restart|reload|force-reload) restart ;; condrestart) [ -f $PIDFILEPATH] && restart || : ;; status) status $testCLIENT RETVAL=$? ;; *) echo "Usage: $0 {start|stop|status|restart|reload|force-reload|condrestart}" RETVAL=1 esac exit $RETVAL

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node = 1 [system] pidFilePath=/var/lib/helloworldtest/run/hello.pid logFilePath=/var/lib/helloworldtest/log/hello.log

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[Unit] Description=helloworld [Service] Type=forking EnvironmentFile=/etc/helloworld.conf ExecStartPre=/bin/sh -c '/bin/install -d -m 0755 -o root -g root $( /usr/bin/dirname ${logFilePath} )' ExecStartPre=/bin/sh -c '/bin/install -d -m 0755 -o root -g root $( /usr/bin/dirname ${pidFilePath} )' ExecStart=/usr/local/sbin/daemonize -p ${pidFilePath} -a -o ${logFilePath} -e ${logFilePath} /usr/local/bin/helloworld -c /etc/helloworld.conf ExecStopPost=/bin/kill $MAINPID Restart=always [Install] WantedBy=default.target