nixpkgs-suyu/upstart-jobs/ifplugd.nix

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{ifplugd, config, writeScript, bash}:
let
# The ifplugd action script, which is called whenever the link
# status changes (i.e., a cable is plugged in or unplugged). We do
# nothing when a cable is unplugged. When a cable is plugged in, we
# restart dhclient, which will hopefully give us a new IP address
# if appropriate.
plugScript = writeScript "ifplugd.action" "#! ${bash}/bin/sh
if test \"$2\" = up; then
initctl stop dhclient
sleep 1
initctl start dhclient
fi
";
in
{
name = "ifplugd";
extraPath = [ifplugd];
job = "
description \"Network interface connectivity monitor\"
start on network-interfaces/started
stop on network-interfaces/stop
respawn ${ifplugd}/sbin/ifplugd --no-daemon --no-startup --no-shutdown \\
${if config.get ["networking" "interfaceMonitor" "beep"] then "" else "--no-beep"} \\
--run ${plugScript}";
}