#!/bin/sh
#####################
#
# name: airpoll (airpoll.sh)
# vers: 0.2a
# date: 070806
# first: 042006
# auth: "Keith Beckman" <kbeckm@alphahelical.com>
# site: http://alphahelical.com/code/osx/airpoll
# desc: airpoll is a simple script which continuously monitors your
#       AirPort link status. If there is a problem finding the airport
#       command, try $> locate airport to find where the executable
#       (located in the Apple80211.framework) lies, and put that path (sans
#       the "airport" itself) in $air_path.
#
#####################

####configuration####

verstring='airpoll v0.2a 070806 Keith Beckman'
air_path='/System/Library/PrivateFrameworks/Apple80211.framework/Versions/Current/Resources/'
interval=10

##end configuration##


ap_usage () {
	echo "Usage: airpoll -[h|v] [-i interval]
    airpoll continuously monitors your AirPort link status at the specified
    interval (default is ten seconds).

    -i|--interval sets number of seconds between status checks
    -v|--version displays the version string
    -h|--help displays this help text"
	}

poll_airport () {
	while [ 1 ]; do
		${air_path}airport -I |\
			grep linkStatus |\
			cut -d ':' -f 2 |\
			cut -d ' ' -f 2
		sleep $interval
		done
	}

case $1 in
	'-v'|'--version')
		echo $verstring;
		exit
		;;
	'-h'|'--help'|'-u'|'--usage')
		ap_usage
		exit
		;;
	'-i'|'--interval')
		if [ $2 ]; then
			interval=$2
		else
			echo "Please specify an interval when using the '-i' option."
			exit
		fi
		;;
	*)
	esac

poll_airport