MINI Sh3ll

#!/bin/sh

# SPDX-License-Identifier: CC0-1.0
# 2021 Aleksander Morgado <[email protected]>
#
# Quectel EM120 FCC unlock operation
#

# require program name and at least 2 arguments
[ $# -lt 2 ] && exit 1

# first argument is DBus path, not needed here
shift

# second and next arguments are control port names
for PORT in "$@"; do
  # match port type in Linux 5.14 and newer
  grep -q MBIM "/sys/class/wwan/$PORT/type" 2>/dev/null && {
    MBIM_PORT=$PORT
    break
  }
  # match port name in Linux 5.13
  echo "$PORT" | grep -q MBIM && {
    MBIM_PORT=$PORT
    break
  }
done

# fail if no MBIM port exposed
[ -n "$MBIM_PORT" ] || exit 2

# run mbimcli operation
mbimcli --device-open-proxy --device="/dev/$MBIM_PORT" --quectel-set-radio-state=on
exit $?