Execute script on unplugging of usb-stick

[neonknight]

I'd like to execute a script or command when I unplug my USB-memory-stick (flash drive or whatever you may call it). But I don't really know how to do this. Executing a script when plugging it in seems to be no problem.

I have tried it with a hotplug-rule:
Create a file /etc/hotplug/usb/usb-storage and added a few commands (for testing purpose: logger "hotplug script was executed"). Well, it works - when plugging the stick in. But there's no go when unplugging.

Second attempt was to write a udev-rule:
BUS="scsi", KERNEL="sd?", SYSFS(vendor)="3SYSTEM", SYSFS(model)="USB FLASH DISK", PROGRAM="/usr/bin/logger 'udev rule has executed command'"
Uhm, what to say. It works also only when plugging in.

Of course I could parse the syslog or check for the device's uuid every few seconds. But polling is not a nice realtime-response and uses too many ressources

What else could I do to execute the script when the stick has been removed?

[Headrush]

You need to use usermap files in /etc/hotplug/. There are several files in there already that you can copy and adjust.

The usermap lists the device ID and the program to call when hotplug sees a change.

In the program you call, you can have different actions for ADD, REMOVE, etc, like this example for my scanner:

[neonknight]

Thanks for your reply! I will try that.