openwrt-sim7600-uqmi-startup.sh

#!/bin/bash -x

sleep 15
_uqmi="/sbin/uqmi"

ifdown WWAN || true

_cleanup() {
	/usr/bin/killall "${_uqmi}" 2>/dev/null || true
	for i in $(/bin/ps www | /usr/bin/awk '/uqmi/ && /cdc-wdm0/ && !/awk/ {print $1}'); do
		/bin/kill -9 "$i" 2>/dev/null || true
	done
}
_timeout_() {
	local _pid=""
	${*} &
	_pid=$!
	sleep 5
	_still_running=$(ps w | awk -v p="${_pid}" '$1 == p {print $1}')
	if [[ -n ${_still_running} ]]; then
		killall "${_uqmi}" 2>/dev/null || true
		kill -9 "${_still_running}" 2>/dev/null || true
		return 2
	fi
	return 0
}

_timeout=0
while :; do
	if [[ ${_timeout} -gt 60 ]]; then
		printf '%s bailing out...\n' "$0"
		exit 2
	fi
	if _timeout_ "${_uqmi}" -d /dev/cdc-wdm0 --set-device-operating-mode=online; then
		sleep 1
		_timeout_ "${_uqmi}" -d /dev/cdc-wdm0 --set-network-roaming=any
		break
	fi
	sleep 3
	_timeout=$((_timeout + 3))
	_cleanup
done

_timeout=0
while :; do
	if [[ ${_timeout} -gt 60 ]]; then
		printf '%s bailing out...\n' "$0"
		exit 2
	fi
	if _timeout_ /sbin/ifup WWAN; then
		sleep 3
		"${_uqmi}" -d /dev/cdc-wdm0 --get-signal-info
		/bin/sleep 1
		"${_uqmi}" -d /dev/cdc-wdm0 --get-data-status
		/bin/sleep 1
		"${_uqmi}" -d /dev/cdc-wdm0 --get-current-settings
		break
	fi
	sleep 3
	_timeout=$((_timeout + 3))
	_cleanup
done

exit 0