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: "Yann E. MORIN" <yann.morin.1998@free.fr> Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
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@ -6,8 +6,37 @@
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# Debian ifupdown needs the /run/network lock directory
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mkdir -p /run/network
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# In case we have a slow-to-appear interface (e.g. eth-over-USB),
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# and we need to configure it, wait until it appears, but not too
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# long either. WAIT_DELAY is in seconds.
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WAIT_DELAY=15
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wait_for_interfaces() {
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IFACES=$(awk '/^auto/ { print $2 }' /etc/network/interfaces)
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[ -n "$IFACES" ] || return
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printf "Waiting for network interfaces to appear"
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for i in $(seq $WAIT_DELAY); do
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for IFACE in $IFACES; do
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if [ ! -e "/sys/class/net/$IFACE" ]; then
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printf "."
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sleep 1
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continue 2
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fi
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done
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printf " ok\n"; return
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done
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printf " timeout\n"
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exit 1
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}
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case "$1" in
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start)
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wait_for_interfaces
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echo "Starting network..."
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/sbin/ifup -a
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;;
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