squid启动脚本

squid启动脚本：

#!/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.
#
#Creation_date=2011-10-31
#pidfile=/usr/local/squid/var/run/squid.pid
#config=/etc/squid.conf
#Author=ftqzy
#Modified=2011-10-31
#Version=1.0

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

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

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

# 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}

squid=/usr/local/squid/sbin/squid
squid_config=/etc/squid.conf
squid_pid=/usr/local/squid/var/run/squid.pid

# determine the name of the squid binary
[ -f $squid ] && prog="squid"

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

[ -z "$CACHE_SWAP" ] && CACHE_SWAP=/cache

RETVAL=0

start() {
    if [ ! -f $squid_config ]; then
        echo "Configuration file $squid_config missing" 1>&2
            exit 6
        fi
    if [ -z "$squid" ]; then
                echo "Insufficient privilege" 1>&2
                exit 4
        fi
    for adir in $CACHE_SWAP; do
        if [ ! -d $adir/00 ]; then
             echo -n "init_cache_dir $adir... "
             $squid -z -f $squid_config >> /var/log/squid/cache.log
        fi
    done
    echo -n $"Starting $prog: "
    $squid $SQUID_OPTS -s -f $squid_config >> /var/log/squid/cache.log 2>&1
    RETVAL=$?
    if [ $RETVAL -eq 0 ]; then
           timeout=0;
           while : ; do
          [ ! -f $squid_pid ] || break
          if [ $timeout -ge $SQUID_PIDFILE_TIMEOUT ]; then
             RETVAL=1
             break
          fi
          sleep 1
          timeout=$((timeout+1))
           done
    fi
    [ $RETVAL -eq 0 ] && touch /var/lock/subsys/$prog
    [ $RETVAL -eq 0 ] && echo_success
    [ $RETVAL -ne 0 ] && echo_failure
    echo
    return $RETVAL
}

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

reload() {
    $squid -k reconfigure -f $squid_config
    echo -n  $"reload_config $prog: "
    echo_success
    echo
}

restart() {
    stop
    sleep 5
    start
}

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

rhstatus() {
    status $squid && $squid -k check -f $squid_config
}

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 2
esac

exit $?