init script for squid on openWRT

squid.init

#!/bin/sh /etc/rc.common
# Squid 3.4 control script for openwrt
#
# Assumes a squid installation under /usr/local/squid, all other
# values are parsed from the squid config file so no need to edit
# locally
#
# Copyright (C) 2007 OpenWrt.org

START=99
STOP=99

export PATH=/usr/local/squid/bin:/usr/local/squid/sbin:$PATH
CONFIG_FILE="/etc/squid.conf"
TARGET_LOG_DIR="/var/log/squid"

# parsed from config file
CACHE_DIR=$(awk '/^cache_dir/ {print $3;}' $CONFIG_FILE)
SQUID_USER=$(awk '/^cache_effective_user/ {print $2;}' $CONFIG_FILE)
LOG_DIR=$(awk '/^cache_log/ {gsub(/\/[^\/]+$/,"", $2); print $2;};' $CONFIG_FILE)
SQUID_CMD="squid -f $CONFIG_FILE"

start() {
	echo "Squid options parsed from config file:"
	echo "  CONFIG_FILE $CONFIG_FILE"
	echo "  CACHE_DIR $CACHE_DIR"
	echo "  SQUID_USER $SQUID_USER"
	echo "  LOG_DIR $LOG_DIR"
	echo "  SQUID_CMD $SQUID_CMD"
	
	# LOG_DIR should refer to a location on usb storage to keep
	# potentially huge log files out of ramdisk ;-)  For 
	# convenience we will symlink this directory back to 
	# /var/log/squid so the logs are easy to find
	if [ ! -d "$LOG_DIR" ] ; then
		mkdir -p "$LOG_DIR"
		chown "$SQUID_USER" "$LOG_DIR"
	fi

        # For convenience we will symlink this directory back to                    
        # /var/log/squid so the logs are easy to find     
        if [ ! -L "$TARGET_LOG_DIR" ] ; then                            
        	ln -s "$LOG_DIR" "$TARGET_LOG_DIR"                      
        fi  

	if [ ! -d "$CACHE_DIR" ] ; then
		echo "No cache dir found at ${CACHE_DIR} creating it now..."
		mkdir -p "$CACHE_DIR"
		chown "$SQUID_USER" "$CACHE_DIR"
		$SQUID_CMD -z
	fi
	echo "Starting squid..."
	$SQUID_CMD
}                 

stop() {  
	echo "Stopping squid..."      
	$SQUID_CMD -k shutdown
}