#!/bin/bash
# squid		This shell script takes care of starting and stopping
#		Squid Internet Object Cache
#
# chkconfig: - 90 25
# description: Squid - Internet Object Cache. Internet object caching is \
# 	a way to store requested Internet objects (i.e., data available \
# 	via the HTTP, FTP, and gopher protocols) on a system closer to the \
#	requesting site than to the source. Web browsers can then use the \
#	local Squid cache as a proxy HTTP server, reducing access time as \
#	well as bandwidth consumption.
# pidfile: /var/run/squid.pid
# config: /etc/squid/squid.conf

PATH=/usr/bin:/sbin:/bin:/usr/sbin
export PATH

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

# Source networking configuration.
. /etc/sysconfig/network

# Check that networking is up.
[ ${NETWORKING} = "no" ] && exit 0

# check if the squid conf file is present
[ -f /etc/squid/squid.conf ] || exit 0

if [ -f /etc/sysconfig/squid ]; then
  . /etc/sysconfig/squid
fi

# don't raise an error if the config file is incomplete 
# set defaults instead:
SQUID_OPTS=${SQUID_OPTS:-"-D"}
SQUID_PIDFILE_TIMEOUT=${SQUID_PIDFILE_TIMEOUT:-20}
SQUID_SHUTDOWN_TIMEOUT=${SQUID_SHUTDOWN_TIMEOUT:-100}

# determine the name of the squid binary
[ -f /usr/sbin/squid ] && SQUID=squid
[ -z "$SQUID" ] && exit 0

prog="$SQUID"

# determine which one is the cache_swap directory
CACHE_SWAP=`sed -e 's/#.*//g' /etc/squid/squid.conf | \
	grep cache_dir |  awk '{ print $3 }'`
[ -z "$CACHE_SWAP" ] && CACHE_SWAP=/var/spool/squid

RETVAL=0

start() {
    for adir in $CACHE_SWAP; do
        if [ ! -d $adir/00 ]; then 
	     echo -n "init_cache_dir $adir... "
	     $SQUID -z -F -D 2>/dev/null
	fi
    done
    echo -n $"Starting $prog: "
    $SQUID $SQUID_OPTS 2> /dev/null
    RETVAL=$?
    if [ $RETVAL -eq 0 ]; then 
       timeout=0;
       while : ; do
          [ ! -f /var/run/squid.pid ] || break
	  if [ $timeout -ge $SQUID_PIDFILE_TIMEOUT ]; then
	     RETVAL=1
	     break
	  fi
	  sleep 1 && echo -n "."
	  timeout=$((timeout+1))
       done
    fi
    [ $RETVAL -eq 0 ] && touch /var/lock/subsys/$SQUID
    [ $RETVAL -eq 0 ] && echo_success
    [ $RETVAL -ne 0 ] && echo_failure
    echo
    return $RETVAL
}

stop() {
    echo -n  $"Stopping $prog: "
    $SQUID -k check >/dev/null 2>&1
    RETVAL=$?
    if [ $RETVAL -eq 0 ] ; then
        $SQUID -k shutdown &
    	rm -f /var/lock/subsys/$SQUID
	timeout=0
 	while : ; do
		[ -f /var/run/squid.pid ] || break
		if [ $timeout -ge $SQUID_SHUTDOWN_TIMEOUT ]; then
		    echo
		    return 1
		fi
		sleep 2 && echo -n "." 
		timeout=$((timeout+2))
    	done
	echo_success
	echo 
    else
    	echo_failure
	echo
    fi
    return $RETVAL
}    

reload() {
    $SQUID $SQUID_OPTS -k reconfigure 
}

restart() {
    stop
    start
}    

condrestart() {
    [ -e /var/lock/subsys/squid ] && restart || :
}

rhstatus() { 
    status $SQUID
    $SQUID -k check
}

probe() {
    return 0
}    

case "$1" in
start)
    start
    ;;

stop)
    stop
    ;;

reload)
    reload
    ;;

restart)
    restart
    ;;

condrestart)
    condrestart
    ;;

status)
    rhstatus
    ;;

probe)
    exit 0
    ;;

*)
    echo $"Usage: $0 {start|stop|status|reload|restart|condrestart}"
    exit 1
esac

exit $?