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Old 10-03-2009, 04:05 AM   #1
dogfuel
LQ Newbie
 
Registered: Oct 2009
Posts: 9

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log scanned barcodes (posing as keystrokes) using python and evdev.py


I have a barcode scanner that, like most, injects the scanned string and a lf as text from a keyboard. Rather than scan data into an application, I'd like to simply log the time of the scan and barcode data scanned to a file.

I'm so new to this I feel like an idiot but assume I can loop and and use evdev.py to distinguish between the "real" keyboard and the scanner (scanner is on /dev/input/event7). My question is how to detect the scan, write the characters to a file and, if possible, stop the barcode "keystrokes" from getting to X.

So far:

PHP Code:
import evdev
scanner_location 
'/dev/input/event7'  # get the correct one from HAL or so
scanner_device evdev.Device(scanner_location)

while 
1:
    
scanner_device.poll() 
In my ignorance, I do not know what to test in the loop and what do next ... please help
 
  


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