its-ap-builder/access-points/files/common/its/etc/hotplug.d/iface/10-disable-wifi-when-uplink-gone

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#!/bin/sh
uci_set_forall_wifi_ifaces () {
WIFI_IFACES=$(uci show wireless | sed -nr 's/^wireless\.([^=]+)=wifi-iface*$/\1/p')
for iface in $WIFI_IFACES; do
uci set wireless.$iface."$1"
done
}
logger -t wifi-uplink hotplug "$DEVICE" "$INTERFACE" "$ACTION"
# 'lan' doesn't work for some reason
[ "$INTERFACE" = apctl ] || exit 0
logger -t wifi-uplink devchange "$DEVICE" "$INTERFACE" "$ACTION"
[ "$ACTION" = ifup ] && {
logger -t wifi-uplink up "$DEVICE" "$INTERFACE" "$ACTION"
uci_set_forall_wifi_ifaces disabled=0
wifi
}
[ "$ACTION" = ifdown ] && {
logger -t wifi-uplink down "$DEVICE" "$INTERFACE" "$ACTION"
wifi down
uci_set_forall_wifi_ifaces disabled=1
}