Before You Begin
There are some things one must understand about Mac OS X login scripts before you can begin:
- Apple refers to them as login- and logout- “hooks”.
- Hooks run as root so you need to su as the user to take actions as the user.
- You must activate them with the defaults command or use Workgroup Manager in Open Directory.
Creating a Login Script
You can technically save your scripts anywhere on the filesystem, but
/usr/local/bin makes a lot of sense for various reasons.
So, create a file there and mark it executable:
sudo touch /usr/local/bin/login sudo chmod +x /usr/local/bin/login
Configuring Login Script Actions
Open the login script in your favorite editor:
sudo vi /usr/local/bin/login
Inside the script, you can do things as root or as the user as shown in this sample batch script:
#!/bin/bash ## # Mac login script ## # As root, create a directory named "/foo" mkdir /foo # As root, set or enforce system settings defaults write ... # As the user, create a directory named "~/foo" su - $1 -c "/bin/mkdir -p ~/foo" # As the user, set or enforce user settings su - $1 -c "/usr/bin/defaults write ..."
The username is passed to the script as the one (and only) argument. In bash, you can use the
$1 variable to access the username.
Activating a Login Script
Run this to activate the script:
sudo defaults write com.apple.loginwindow LoginHook /usr/local/bin/login
Configure a logout script by following the instructions above then activate it as follows:
sudo defaults write com.apple.loginwindow LogoutHook /usr/local/bin/logout