Commit 49964858 authored by Yann E. MORIN's avatar Yann E. MORIN Committed by Peter Korsgaard
Browse files

package/initscripts: S40network: wait for network interfaces to appear 



On some machines, the network interface is slow to appear. For example,
on the Raspberry Pi, the network interface eth0 is an ethernet-over-USB,
and our standard boot process is too fast, so our network startup script
is called before the USB bus is compeltely enumerated, thus it can't
configure eth0.

Closes #8116.

[Peter: move to S40network, handle multiple interfaces]
Signed-off-by: default avatar"Yann E. MORIN" <yann.morin.1998@free.fr>
Signed-off-by: default avatarPeter Korsgaard <peter@korsgaard.com>
parent b2c97f78

package/initscripts/init.d/S40network

+29 −0
Original line number Diff line number Diff line
@@ -6,8 +6,37 @@ 
# Debian ifupdown needs the /run/network lock directory

mkdir -p /run/network



# In case we have a slow-to-appear interface (e.g. eth-over-USB),

# and we need to configure it, wait until it appears, but not too

# long either. WAIT_DELAY is in seconds.

WAIT_DELAY=15



wait_for_interfaces() {

	IFACES=$(awk '/^auto/ { print $2 }' /etc/network/interfaces)

	[ -n "$IFACES" ] || return



	printf "Waiting for network interfaces to appear"



	for i in $(seq $WAIT_DELAY); do

	    for IFACE in $IFACES; do

		if [ ! -e "/sys/class/net/$IFACE" ]; then

		    printf "."

		    sleep 1

		    continue 2

		fi

	    done



	    printf " ok\n"; return

	done



	printf " timeout\n"

	exit 1

}



case "$1" in

  start)

	wait_for_interfaces



 	echo "Starting network..."

	/sbin/ifup -a

	;;