openrc/init.d/net-online.in

#!@SBINDIR@/openrc-run
# Copyright (c) 2015 The OpenRC Authors.
# See the Authors file at the top-level directory of this distribution and
# https://github.com/OpenRC/openrc/blob/master/AUTHORS
#
# This file is part of OpenRC. It is subject to the license terms in
# the LICENSE file found in the top-level directory of this
# distribution and at https://github.com/OpenRC/openrc/blob/master/LICENSE
# This file may not be copied, modified, propagated, or distributed
# except according to the terms contained in the LICENSE file.

description="Delays until the network is online or a specific timeout"

depend()
{
	after modules
	need sysfs
	keyword -jail -lxc -openvz -prefix -systemd-nspawn -uml -vserver
}

get_interfaces()
{
	local ifname iftype
	for ifname in /sys/class/net/*; do
		read iftype < ${ifname}/type
		[ "$iftype" = "1" ] && printf "%s " ${ifname##*/}
	done
}

get_default_gateway()
{
	local cmd gateway
	if command -v ip > /dev/null 2>&1; then
		cmd="ip route show"
	else
		cmd=route
	fi
	set -- $($cmd | grep default)
	[ "$2" != via ] && gateway="$2" || gateway="$3"
	printf "%s" $gateway
}

start ()
{
	local carriers configured dev gateway ifcount infinite interfaces
	local rc state timeout x

	ebegin "Checking to see if the network is online"
	rc=0
	interfaces=${interfaces:-$(get_interfaces)}
	timeout=${timeout:-120}
 [ $timeout -eq 0 ] && infinite=true || infinite=false
 while $infinite || [ $timeout -gt 0 ]; do
	carriers=0
	configured=0
	ifcount=0
 	for dev in ${interfaces}; do
		: $((ifcount += 1))
		read x < /sys/class/net/$dev/carrier
		[ $x -eq 1 ] && : $((carriers += 1))
		read x < /sys/class/net/$dev/operstate
		[ "$x" = up ] && : $((configured += 1))
	done
	[ $configured -eq $ifcount ] && [ $carriers -ge 1 ] && break
	sleep 1
	: $((timeout -= 1))
 done
 ! $infinite && [ $timeout -eq 0 ] && rc=1
 if [ $rc -eq 0 ] && yesno ${ping_default_gateway:-no}; then
 	gateway="$(get_default_gateway)"
 	if [ -n "$gateway" ] && ! ping -c 1 $gateway > /dev/null 2>&1; then
		rc=1
	fi
 fi
 eend $rc "The network is offline"
}