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#!/usr/bin/python3
"""Executable to read the Key Events from the Barcode Scanner (root Priviledges necessary)"""
import evdev
import os
import iot_barcode_scanner.config as config
def main():
try:
# read config
cfg = config.get_config()
fifo_path = cfg["scanner"]["fifo_path"]
event_device_path = cfg["scanner"]["evdev_path"]
# prepare fifo
os.makedirs(os.path.dirname(fifo_path), exist_ok=True)
os.mkfifo(fifo_path)
barcode_scanner = evdev.InputDevice(event_device_path)
with barcode_scanner.grab_context():
for event in barcode_scanner.read_loop():
if event.type == evdev.ecodes.EV_KEY:
eventdata = evdev.categorize(event)
if eventdata.keystate:
with open(fifo_path, "w") as fifo:
fifo.write(eventdata.keycode)
fifo.flush()
except KeyboardInterrupt:
pass
finally:
os.remove(fifo_path)
if __name__ == "__main__":
main()
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