#!/bin/sh
#
# External Udev program to rename peak_usb CAN interfaces according to the flashed device numbers.
#
# (C) 2023 PEAK-System GmbH by Stephane Grosjean 
#
[ -z "$1" ] && exit 1
CAN_ID="/sys/class/net/$1/peak_usb/can_channel_id"
if [ -f $CAN_ID ]; then
        devid=`cat $CAN_ID`
        # PCAN-USB specific: use "000000FF" instead of "FFFFFFFF" below
        if [ "$devid" != "00000000" -a "$devid" != "FFFFFFFF" ]; then
                printf "can%d\n" 0x${devid}
                exit 0
        fi
fi
echo $1