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#!/bin/bash
#
# yum-cron           This shell script enables the automatic use of YUM
#
# Author:       Seth Vidal <skvidal@phy.duke.edu>
#
# chkconfig:	- 50 01
#
# description:  Enable daily run of yum, a program updater.
# processname:  yum-cron
# config: /etc/yum/yum-daily.yum
#

# source function library
. /etc/rc.d/init.d/functions

test -f /etc/sysconfig/yum-cron && . /etc/sysconfig/yum-cron

lockfile=/var/lock/subsys/yum-cron
tslock=/var/lock/yum-cron.lock/ts.lock
yumcronpid=/var/lock/yum-cron.lock/pidfile

RETVAL=0

start() {
	echo -n $"Enabling nightly yum update: "
	touch "$lockfile" && success || failure
	RETVAL=$?
	echo
}

stop() {
	echo -n $"Disabling nightly yum update: "
	if [ -f "$yumcronpid" -a "$SERVICE_WAITS" = "yes" ]; then
	  yum_done=0
	  if [ ! -f $tslock ]; then
	    # No transaction yet in progress, just kill it
	    kill `cat $yumcronpid > /dev/null 2>&1` > /dev/null 2>&1
	    yum_done=1
	  fi
	  if [ $yum_done -eq 0 ]; then
	    echo -n $"Waiting for yum "
	    if [ -z "$SERVICE_WAIT_TIME" ]; then
	      SERVICE_WAIT_TIME=300
	    fi
	    start=`date +%s`
	    end=`expr $start + $SERVICE_WAIT_TIME`
	    while [ `date +%s` -le $end ]
	    do
	      sleep 5
	      if [ ! -f "$tslock" ]; then
		yum_done=1
	        break
	      fi
	    done
	    if [ $yum_done -eq 1 ]; then
	      echo -n " ok "
	    else
	      echo -n " failed "
	    fi
	  fi
	fi
	rm -f "$lockfile" && success || failure
	RETVAL=$?
	echo
}

restart() {
	stop
	start
}

case "$1" in
  start)
	start
	;;
  stop) 
	stop
	;;
  restart|force-reload)
	restart
	;;
  reload)
	;;
  condrestart)
	[ -f "$lockfile" ] && restart
	;;
  status)
	if [ -f $lockfile ]; then
		echo $"Nightly yum update is enabled."
		RETVAL=0
	else
		echo $"Nightly yum update is disabled."
		RETVAL=3
	fi
	;;
  *)
	echo $"Usage: $0 {start|stop|status|restart|reload|force-reload|condrestart}"
	exit 1
esac

exit $RETVAL

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