mdev-helpers

tty-usb (516B)

#!/bin/sh
# Copyright ⓞ 2026 Haelwenn (lanodan) Monnier
# SPDX-License-Identifier: BSD-3-Clause
arg0="$0"
[ -z "$MDEV" ] && exit 1
serial_path="/sys/class/tty/${MDEV}/device/../serial"
if ! test -f "$serial_path" ; then
	serial_path="/sys/class/tty/${MDEV}/device/../../serial"
	if ! test -f "$serial_path" ; then
		printf '%s: error: Failed to find serial for device %s\n' "$arg0" "$MDEV" >&2
		exit 0
	fi
fi
serial="$(cat "$serial_path")"
mkdir -p /dev/serial/
ln -snf "/dev/${MDEV}" "/dev/serial/${serial}"