Commit ccc52c81 authored by Jérôme Pouiller's avatar Jérôme Pouiller Committed by Thomas Petazzoni
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skeleton: optionally wait for network interfaces to appear 



This patch has same purpose than 49964858:

  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.

However, wait-delay hook is enabled only if wait-delay property appears
in /etc/network/interfaces. This patch enable it automaticaly when
interface is configured through DHCP at bootup. But, if user choose
to write /etc/network/interface himself, he have to explicitly
set wait-delay.

Signed-off-by: default avatarJérôme Pouiller <jezz@sysmic.org>
Reviewed-by: default avatar"Yann E. MORIN" <yann.morin.1998@free.fr>
Signed-off-by: default avatarThomas Petazzoni <thomas.petazzoni@free-electrons.com>
parent 81ece45c

package/skeleton/skeleton.mk

+1 −0
Original line number Diff line number Diff line
@@ -89,6 +89,7 @@ define SET_NETWORK_DHCP 
		echo ;                                               \

		echo "auto $(NETWORK_DHCP_IFACE)";                   \

		echo "iface $(NETWORK_DHCP_IFACE) inet dhcp";        \

		echo "	wait-delay 15";                              \

	) >> $(TARGET_DIR)/etc/network/interfaces

endef

endif

system/skeleton/etc/network/if-pre-up.d/wait_iface

0 → 100755
+21 −0
Original line number Diff line number Diff line 
#!/bin/sh



# 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. IF_WAIT_DELAY is in seconds.



if [ "${IF_WAIT_DELAY}" -a ! -e "/sys/class/net/${IFACE}" ]; then

    printf "Waiting for interface %s to appear" "${IFACE}"

    while [ ${IF_WAIT_DELAY} -gt 0 ]; do

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

            printf "\n"

            exit 0

        fi

        sleep 1

        printf "."

        : $((IF_WAIT_DELAY -= 1))

    done

    printf " timeout!\n"

    exit 1

fi