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|
#!/bin/sh -e
#
# run /sbin/{ifup,ifdown} with the --allow=hotplug option.
#
. /lib/udev/hotplug.functions
if [ -z "$INTERFACE" ]; then
mesg "Bad net.agent invocation: \$INTERFACE is not set"
exit 1
fi
check_program() {
[ -x $1 ] && return 0
mesg "ERROR: $1 not found. You need to install the ifupdown package."
mesg "net.agent $ACTION event for $INTERFACE not handled."
exit 1
}
wait_for_interface() {
local interface=$1
while :; do
local state="$(cat /sys/class/net/$interface/operstate 2>/dev/null || true)"
if [ "$state" != down ]; then
return 0
fi
sleep 1
done
}
net_ifup() {
check_program /sbin/ifup
if grep -q '^auto[[:space:]].*\<'"$INTERFACE"'\>' \
/etc/network/interfaces; then
# this $INTERFACE is marked as "auto"
IFUPARG='\('$INTERFACE'\|-a\|--all\)'
else
IFUPARG=$INTERFACE
fi
if ps -C ifup ho args | grep -q "$IFUPARG"; then
debug_mesg "Already ifup-ing interface $INTERFACE"
exit 0
fi
wait_for_interface lo
if [ -e /bin/systemctl ]; then
wait_for_file /dev/log
fi
exec ifup --allow=hotplug $INTERFACE
}
net_ifdown() {
check_program /sbin/ifdown
if ps -C ifdown ho args | grep -q $INTERFACE; then
debug_mesg "Already ifdown-ing interface $INTERFACE"
exit 0
fi
exec ifdown --allow=hotplug $INTERFACE
}
do_everything() {
case "$ACTION" in
add)
# these interfaces generate hotplug events *after* they are brought up
case $INTERFACE in
ppp*|ippp*|isdn*|plip*|lo|irda*|ipsec*)
exit 0 ;;
esac
net_ifup
;;
remove)
# the pppd persist option may have been used, so it should not be killed
case $INTERFACE in
ppp*)
exit 0 ;;
esac
net_ifdown
;;
*)
debug_mesg "NET $ACTION event not supported"
exit 1
;;
esac
}
# When udev_log="debug" stdout and stderr are pipes connected to udevd.
# They need to be closed or udevd will wait for this process which will
# deadlock with udevsettle until the timeout.
do_everything > /dev/null 2> /dev/null &
exit 0
|
