I want to run a script when usb flash device is connected in ubuntu 13.10, this is the /etc/udev/rules.d/91.test.rule:

this is the test.sh:

But this is not working?

What user would that launched process run as? nobody? And does it have write permissions to /var/log/? Perhaps another method of verifying if it works or not.

Thanks for reply, the problem is not with the permission but the with the rule itself, i tested with other programs like this one:

The rule should launch the bluefish that can be as user or root no problem but not working.

According to the manpage.

--- Starting daemons and other long running processes is not appropriate for udev; the forked processes, detached or not, will be unconditionally killed after the event handling has finished. ---

So whatever it does will likely persist for as long as it takes to create the /dev/ names for the device. Or I could be wrong. You'll likely need to setup a daemon to lauch whatever application and the RUN would pass some form of communication to that daemon to do something (like create a file and if a file exists the daemon launches an application and removes the file to avoid duplication of efforts).

In the case of a GUI application you'll need the magic cookie and DISPLAY and XAUTHORITY vars set for the user who launches that application. AKA the .Xauthority file depending on distro and configuration. The user who launches X has those configured already because it launched X. Any other user wanting to share the X session has to do that manually, unless the display manager handles that process.