source /etc/network/interfaces.d/*

# The loopback network interface
auto lo
iface lo inet loopback

# The primary network interface
iface eth0 inet dhcp

iface usb0 inet dhcp

iface wlan0 inet dhcp

#!/bin/sh
#
# netplug - policy agent for netplugd
#
# Copyright 2003 Key Research, Inc.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License, version 2, as
# published by the Free Software Foundation.  You are forbidden from
# redistributing or modifying it under the terms of any other license,
# including other versions of the GNU General Public License.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
# General Public License for more details.

PATH=/usr/bin:/bin:/usr/sbin:/sbin
export PATH

dev="$1"
action="$2"

case "$action" in
in)
    if [ -x /sbin/ifup ]; then
        exec /sbin/ifup "$dev"
    else
        echo "Please teach me how to plug in an interface!" 1>&2
        exit 1
    fi
    ;;
out)
    if [ -x /sbin/ifdown ]; then
        # At least on Fedora Core 1, the call to ip addr flush infloops
        # /sbin/ifdown $dev && exec /sbin/ip addr flush $dev
        if ! [ -d "/sys/class/net/$dev/wireless" ]; then
                exec /sbin/ifdown "$dev"
        else
                # Do the same thing as ifdown (kill dhcp process, etc.) without putting the interface down
                # Putting the interface fully down will break IWD.
                eval "$(ifdown -n -f "$dev" 2>&1 | tail -n +2 | tac | tail -n +4 | tac | tr '\n' ';' | head -c -1)" && \
                echo > "/var/run/network/ifstate.$dev"
        fi
    else
        echo "Please teach me how to unplug an interface!" 1>&2
        exit 1
    fi
    ;;
probe)
    exec test -d "/sys/class/net/$dev" >/dev/null 2>&1
    ;;
*)
    echo "I have been called with a funny action of '$action'!" 1>&2
    exit 1
    ;;
esac

eth*
wlan*
usb*