Change location following SSID

locationchanger.sh

#!/bin/bash

## Settings
# locations (use to be used Location name here)
ATHOME="home"
ATWORK="titech"

# detect HOME
ATHOME_SSID="home_router_ssid"
ATWORK_SSID="titech-pubnet"

## {{{ Codes
exec 1>/dev/null 2>/dev/null
SSIDs=`/System/Library/PrivateFrameworks/Apple80211.framework/Versions/A/Resources/airport -s\
| tail -n +2 | awk '{print $1}'`

Work=`echo $SSIDs | grep $ATWORK_SSID`
Home=`echo $SSIDs | grep $ATHOME_SSID`

netloc=`scselect 2>&1 | egrep '^ \* ' | sed 's:.*(\(.*\)):\1:'`
newloc=netloc # default behavior


if [ -n "$Work" ]; then
    LOCATION=$ATWORK
    REASON=SSID
    echo "export ALL_PROXY=proxy.noc.titech.ac.jp:3128" > $HOME/.zsh/proxy
fi

if [ -n "$Home" ]; then
    LOCATION=$ATHOME
    REASON=SSID
    echo "export ALL_PROXY=" > $HOME/.zsh/proxy
fi

if [ -z "$LOCATION" ]; then
    LOCATION=$ATHOME
    REASON=Fallback
    echo "export ALL_PROXY=" > $HOME/.zsh/proxy
fi

case $LOCATION in
    $ATWORK )
        newloc=$ATWORK
    ;;

    $ATHOME )
        newloc=$ATHOME
    ;;
esac

if [ $newloc != $netloc ]; then
    scselect $newloc
    echo `date` "Location: $LOCATION - $REASON" >> $HOME/.locationchanger.log
    `/usr/local/bin/growlnotify -m "Location: $LOCATION - $REASON" "Location changed"`
fi

exit 0;
#}}}