This file is indexed.

/usr/share/ofono/scripts/set-mic-volume is in ofono-scripts 1.17.bzr6912+16.04.20160314.3-0ubuntu1.

This file is owned by root:root, with mode 0o755.

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#!/usr/bin/python3

import sys
import dbus

bus = dbus.SystemBus()

manager = dbus.Interface(bus.get_object('org.ofono', '/'),
						'org.ofono.Manager')

modems = manager.GetModems()
path = modems[0][0]

cv = dbus.Interface(bus.get_object('org.ofono', path),
						'org.ofono.CallVolume')

cv.SetProperty("MicrophoneVolume", dbus.Byte(int(sys.argv[1])))