#!/bin/sh

# avoiding "Device or resource busy" error as per https://forum.openwrt.org/viewtopic.php?pid=121485#p121485
# note that iwinfo takes care of this internally

echo "Content-type: text/plain"
echo ""

DEV="${1:-wlan0}"

ifconfig $DEV down
iw dev $DEV interface add scan.$DEV type station
ifconfig scan.$DEV up

iwlist scan.$DEV scan | grep ESSID  | cut -c 27- | tr -d '"'

ifconfig scan.$DEV down
iw dev scan.$DEV del
ifconfig $DEV up