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# in a lxc container, events for network interfaces do not
# get created or may be missed. This helps cloud-init-nonet along
# by emitting those events if they have not been emitted.
start on container
stop on static-network-up
task
emits net-device-added
console output
script
# if we are inside a container, then we may have to emit the ifup
# events for 'auto' network devices.
set -f
# from /etc/network/if-up.d/upstart
MARK_DEV_PREFIX="/run/network/ifup."
MARK_STATIC_NETWORK_EMITTED="/run/network/static-network-up-emitted"
# if the all static network interfaces are already up, nothing to do
[ -f "$MARK_STATIC_NETWORK_EMITTED" ] && exit 0
# ifquery will exit failure if there is no /run/network directory.
# normally that would get created by one of network-interface.conf
# or networking.conf. But, it is possible that we're running
# before either of those have.
mkdir -p /run/network
# get list of all 'auto' interfaces. if there are none, nothing to do.
auto_list=$(ifquery --list --allow auto 2>/dev/null) || :
[ -z "$auto_list" ] && exit 0
set -- ${auto_list}
[ "$*" = "lo" ] && exit 0
# we only want to emit for interfaces that do not exist, so filter
# out anything that does not exist.
for iface in "$@"; do
[ "$iface" = "lo" ] && continue
# skip interfaces that are already up
[ -f "${MARK_DEV_PREFIX}${iface}" ] && continue
if [ -d /sys/net ]; then
# if /sys is mounted, and there is no /sys/net/iface, then no device
[ -e "/sys/net/$iface" ] && continue
else
# sys wasn't mounted, so just check via 'ifconfig'
ifconfig "$iface" >/dev/null 2>&1 || continue
fi
initctl emit --no-wait net-device-added "INTERFACE=$iface" &&
emitted="$emitted $iface" ||
echo "warn: ${UPSTART_JOB} failed to emit net-device-added INTERFACE=$iface"
done
[ -z "${emitted# }" ] ||
echo "${UPSTART_JOB}: emitted ifup for ${emitted# }"
end script