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#!/bin/sh
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# SPDX-License-Identifier: GPL-2.0+
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#
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# Copyright (C) 2012 Red Hat, Inc.
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#
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#
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# This example prints SSIDs of connected Wi-Fi networks.
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# GetDevices() D-Bus call returns all devices. We go through them, find Wi-Fi
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# ones and ask for ActiveAccessPoint property. If the access point path is not
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# empty ("/"), we can read its properties, like SSID.
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#
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NM_SERVICE_NAME="org.freedesktop.NetworkManager"
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NM_OBJECT_PATH="/org/freedesktop/NetworkManager"
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DEVICE_IFACE="org.freedesktop.NetworkManager.Device"
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DEVICE_WIFI_IFACE="org.freedesktop.NetworkManager.Device.Wireless"
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ACCESS_POINT_IFACE="org.freedesktop.NetworkManager.AccessPoint"
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NM_GET_DEVICES="org.freedesktop.NetworkManager.GetDevices"
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DBUS_PROPERTIES_GET="org.freedesktop.DBus.Properties.Get"
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get_devices()
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{
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dbus-send --system --print-reply --dest=$NM_SERVICE_NAME $NM_OBJECT_PATH $NM_GET_DEVICES | \
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grep "object path" | cut -d '"' -f2
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}
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get_property()
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{
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# first arg: object path
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# second arg: interface
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# third arg: property name
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# returns: property value
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dbus-send --system --print-reply --dest=$NM_SERVICE_NAME "$1" $DBUS_PROPERTIES_GET string:"$2" string:"$3" | \
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grep "variant" | awk -F '"' '{ if (NF == 1) {FS=" "; n=split($0,a); print a[n];} else print $(NF-1); }'
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}
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is_wifi_device()
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{
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DEV_TYPE=`get_property $device $DEVICE_IFACE "DeviceType"`
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if [ $DEV_TYPE -eq 2 ]; then
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return 0
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else
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return 1
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fi
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}
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show_active_ssids()
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{
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for device in `get_devices`
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do
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INTERFACE=`get_property $device $DEVICE_IFACE "Interface"`
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if `is_wifi_device`; then
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ACTIVE_AP=`get_property $device $DEVICE_WIFI_IFACE "ActiveAccessPoint"`
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if [ "$ACTIVE_AP" != "/" ]; then
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SSID=`get_property $ACTIVE_AP $ACCESS_POINT_IFACE "Ssid"`
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BSSID=`get_property $ACTIVE_AP $ACCESS_POINT_IFACE "HwAddress"`
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echo "Device '$INTERFACE' is connected to '$SSID' (BSSID=$BSSID)"
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else
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echo "No active AP on device '$INTERFACE'" >&2
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fi
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fi
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done
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}
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# --- main program ---
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# print currently connected SSID on all Wi-Fi devices
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show_active_ssids
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