/etc/reader.conf.d/libccidtwin is in libccid 1.4.22-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 | # Gemalto reader with serial communication
# - n is the serial port to use n in [0..3]
# - reader is the reader name. It is needed for multi-slot readers.
# Possible reader values are:
# GemCorePOSPro
# GemCoreSIMPro
# GemCoreSIMPro2
# GemPCPinPad
# GemPCTwin (default value)
# example: /dev/ttyS0:GemPCPinPad
#DEVICENAME /dev/ttySn[:reader]
#FRIENDLYNAME "GemPCTwin serial"
#LIBPATH /usr/lib/pcsc/drivers/serial/libccidtwin.so
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