Load or Reload a LaunchAgent from installer script

Apple has some restrictions in place to prevent access to LaunchAgents running in a user session context.

But you may want to load or refresh a LaunchAgent as part of your install without requiring the user to log out and back in.

I prefer not to require logouts and reboots in my installation packages.  Where possible, I use munki’s unattended option so software installs silently and the user is not prompted.

After some experimentation, I came up with this hacky method of getting a LaunchAgent to load from a package being installed as root.  If you have a cleaner way to accomplish this, please let me know.  Update: Please see Per Olofsson’s comment for a much better method until I update this gist.


dockutil 1.1 released

Version 1.1 of dockutil is out:

  • fixes many issues with paths (should now work with Default User Template and other paths with spaces)
  • adds option to not restart the dock (–no-restart)
  • fixes issue where item would be added multiple times (use –replacing to update an existing item)
  • resolves deprecation warnings
  • adds option to remove all items (–remove all)
  • fixes issue with removals when a url exists in a dock
  • adds option –version to output version

Fix Apache mod_jk or mod_proxy serving stale content

If your web app starts serving stale cached content when run behind mod_jk or mod_proxy with apache, it may be due to apache inserting a default expiration header.

You can confirm this by comparing the headers returned from apache and directly from your web app.  curl -i will show response headers:

curl -i http://example.com | head -20

To disable apache’s content expirations, add the following to your virtual host:

ExpiresActive Off

Here is the official Apache Documentation.

MIME type issue with Apache mod_jk and mod_proxy serving plain text

Some apps do not properly set mime types of content they serve, but still may work properly when served standalone because client applications like browsers are able to interpret the type of the content.  But when served behind Apache, these apps will not behave correctly because Apache will provide a default type of text/plain.

The solution is to add a DefaultType None line to your apache virtual host for these web apps:

DefaultType None

Here are the docs