squid autostart script

#!/bin/bash
# chkconfig: - 90 25
# pidfile: /var/run/squid.pid
# config: /etc/squid/squid.conf
#
### BEGIN INIT INFO
# Provides: squid
# Short-Description: starting and stopping Squid Internet Object Cache
# 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.
### END INIT INFO


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

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

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

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=${SQUID_OPTS:-""}
SQUID_PIDFILE_TIMEOUT=${SQUID_PIDFILE_TIMEOUT:-20}
SQUID_SHUTDOWN_TIMEOUT=${SQUID_SHUTDOWN_TIMEOUT:-100}
SQUID_CONF=${SQUID_CONF:-"/etc/squid/squid.conf"}

# determine the name of the squid binary
[ -f /usr/sbin/squid ] && SQUID=squid

prog="$SQUID"

# determine which one is the cache_swap directory
CACHE_SWAP=`sed -e 's/#.*//g' $SQUID_CONF | \
        grep cache_dir | awk '{ print $3 }'`

RETVAL=0

probe() {
        # Check that networking is up.
        [ ${NETWORKING} = "no" ] && exit 1

        [ `id -u` -ne 0 ] && exit 4

        # check if the squid conf file is present
        [ -f $SQUID_CONF ] || exit 6
}

start() {
        probe

        parse=`$SQUID -k parse -f $SQUID_CONF 2>&1`
        RETVAL=$?
        if [ $RETVAL -ne 0 ]; then
                echo -n $"Starting $prog: "
                echo_failure
                echo
                echo "$parse"
                return 1
        fi
        for adir in $CACHE_SWAP; do
                if [ ! -d $adir/00 ]; then
                        echo -n "init_cache_dir $adir... "
                        $SQUID -z -F -f $SQUID_CONF >> /var/log/squid/squid.out 2>&1
                fi
        done
        echo -n $"Starting $prog: "
        $SQUID $SQUID_OPTS -f $SQUID_CONF >> /var/log/squid/squid.out 2>&1
        RETVAL=$?
        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 -f $SQUID_CONF >> /var/log/squid/squid.out 2>&1
        RETVAL=$?
        if [ $RETVAL -eq 0 ] ; then
                $SQUID -k shutdown -f $SQUID_CONF &
                rm -f /var/lock/subsys/$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
                if [ ! -e /var/lock/subsys/$SQUID ]; then
                        RETVAL=0
                fi
                echo
        fi
        return $RETVAL
}

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

restart() {
        stop
        start
}

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

rhstatus() {
        status $SQUID && $SQUID -k check -f $SQUID_CONF
}


case "$1" in
start)
        start
        ;;

stop)
        stop
        ;;

reload|force-reload)
        reload
        ;;

restart)
        restart
        ;;

condrestart|try-restart)
        condrestart
        ;;

status)
        rhstatus
        ;;

probe)
        probe
        ;;

*)
        echo $"Usage: $0 {start|stop|status|reload|force-reload|restart|try-restart|probe}"
        exit 2
esac

exit $?