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e6a954ff04
This ensures that ifdown is run when the device is removed and the service is stopped. Closes: #660861, #703033 We eventually should rework that and instead of calling systemctl in net.agent, start the service directly from the udev rule via ENV{SYSTEMD_WANTS}.
112 lines
2.3 KiB
Bash
112 lines
2.3 KiB
Bash
#!/bin/sh -e
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#
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# run /sbin/{ifup,ifdown} with the --allow=hotplug option.
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#
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. /lib/udev/hotplug.functions
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if [ -z "$INTERFACE" ]; then
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mesg "Bad net.agent invocation: \$INTERFACE is not set"
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exit 1
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fi
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check_program() {
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[ -x $1 ] && return 0
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mesg "ERROR: $1 not found. You need to install the ifupdown package."
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mesg "net.agent $ACTION event for $INTERFACE not handled."
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exit 1
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}
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wait_for_interface() {
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local interface=$1
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while :; do
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local state="$(cat /sys/class/net/$interface/operstate 2>/dev/null || true)"
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if [ "$state" != down ]; then
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return 0
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fi
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sleep 1
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done
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}
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net_ifup() {
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check_program /sbin/ifup
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if grep -q '^auto[[:space:]].*\<'"$INTERFACE"'\>' \
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/etc/network/interfaces; then
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# this $INTERFACE is marked as "auto"
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IFUPARG='\('$INTERFACE'\|-a\|--all\)'
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else
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IFUPARG=$INTERFACE
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fi
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if ps -C ifup ho args | grep -q "$IFUPARG"; then
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debug_mesg "Already ifup-ing interface $INTERFACE"
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exit 0
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fi
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wait_for_interface lo
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if [ -d /run/systemd/system ]; then
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exec systemctl start ifup@${INTERFACE}.service
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else
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exec ifup --allow=hotplug $INTERFACE
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fi
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}
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net_ifdown() {
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check_program /sbin/ifdown
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# systemd will automatically ifdown the interface on device
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# removal by binding the instanced service to the network device
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if [ -d /run/systemd/system ]; then
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exit 0
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fi
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if ps -C ifdown ho args | grep -q $INTERFACE; then
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debug_mesg "Already ifdown-ing interface $INTERFACE"
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exit 0
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fi
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exec ifdown --allow=hotplug $INTERFACE
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}
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do_everything() {
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case "$ACTION" in
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add)
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# these interfaces generate hotplug events *after* they are brought up
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case $INTERFACE in
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ppp*|ippp*|isdn*|plip*|lo|irda*|ipsec*)
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exit 0 ;;
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esac
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net_ifup
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;;
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remove)
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# the pppd persist option may have been used, so it should not be killed
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case $INTERFACE in
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ppp*)
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exit 0 ;;
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esac
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net_ifdown
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;;
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*)
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debug_mesg "NET $ACTION event not supported"
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exit 1
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;;
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esac
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}
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# When udev_log="debug" stdout and stderr are pipes connected to udevd.
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# They need to be closed or udevd will wait for this process which will
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# deadlock with udevsettle until the timeout.
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do_everything > /dev/null 2> /dev/null &
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exit 0
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