/etc/network/if-post-down.d/linux-wlan-ng-post-down is in linux-wlan-ng 0.2.9+dfsg-4.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 | #!/bin/sh
#
# This script takes care of bringing down wlan-ng devices.
# It is run by ifdown.
WLANCTL=/sbin/wlanctl-ng
if [ ! -x $WLANCTL ] ; then
exit 0
fi
case $IFACE in
wlan?)
# Reset device to make sure it is not trying to generate
# interrupts.
# Do not disable card if wireless extensions are in use
WEXT=`cat /sys/module/p80211/parameters/wlan_wext_write`
[ "$WEXT" = "0" ] &&
result=`$WLANCTL $IFACE lnxreq_ifstate ifstate=disable`
# Remove lock file, just in case.
rm -f /var/lock/wlan-$IFACE.lock
;;
esac
|