#!/bin/sh

# After it finishes configuring a network interface, dhcpcd will write
# `online` to the `/run/dhcpcd/wait-online` pipe, if it exists.
# Reading from the pipe will block until something is written to it,
# allowing us to wait for the network to be configured, without
# repeatedly polling interface information.
#
# If anything but `online` is read from the pipe, we assume that there
# was an error configuring the network.

cleanup() {
    rm -f /run/dhcpcd/wait-online
}

mkdir -p /run/dhcpcd
mkfifo /run/dhcpcd/wait-online || exit $?
trap cleanup INT TERM QUIT EXIT
status=$(cat /run/dhcpcd/wait-online)
test "${status}" = online