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Insaned is a simple linux daemon for polling button presses on SANE scanners.

##Description

Insaned periodically polls your scanner using the SANE library and runs the corresponding event handler script when a button is pressed. Because of this, button presses are only detected every N milliseconds, so you will have to press and hold the button for at most N milliseconds until an event is fired. Insaned does only fire the same event once in 2500 ms to prevent unwanted repetitions.

It should work with all backends that expose buttons as "Sensors". The daemon reads the value of all sensors every N milliseconds (default: 500) and starts an event handler script named by the sensor name. Polling does not result in a noticeable CPU load, but produces some I/O load. Therefore, it might not be a good idea to run this daemon on a laptop, since it will probably prevent USB bus from entering a low power mode or even keep the laptop awake (not tested yet).

Currently, insaned was tested on:

• Gentoo Linux with sane-backends-1.0.24 and a Canon LiDE 210 flatbed scanner (genesys backend, USB ID 04a9:190a)
• Raspberry Pi with HP Scanjet 2400c (thanks to GaryA)