OnNetworkChange

What is this?

A shell script and launchd plist for running commands whenever a Mac's network location information is updated.

What is included?

onnetworkchange-basic.sh

This is a very basic script for you to start with to create your own actions "on network change".

Note! The .plist file (see below) will only run a program called onnetworkchange.sh so once you have made your own, be sure to rename it appropriately.

onnetworkchange.sh

This is a slightly more complicated file, showing some of the more advanced things that you can do with this.

com.tjluoma.onnetworkchange.plist

This is a launchd plist file which tells launchd to the run the onnetworkchange.sh command any time the folder "/Library/Preferences/SystemConfiguration/" changes (which happens whenever the network settings are changed).

Installation

In order for this to work, you must move two files to the correct location.

1. A script called onnetworkchange.sh has to be somewhere in launchd's PATH. To see what launchd's path is, use

    	launchctl getenv PATH
   

   If you need to change the PATH for launchd add a line to the file /etc/launchd.conf line this:

    	setenv PATH /usr/local/sbin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin
   

2. Next, the com.tjluoma.onnetworkchange.plist file has to be moved to ~/Library/LaunchAgents/. Once it is in place, tell launchd to load it:

    	launchctl load ~/Library/LaunchAgents/com.tjluoma.onnetworkchange.plist