OVS_WAIT_WHILE([kill -0 `cat olddaemon`], [kill `cat olddaemon daemon`])
OVS_WAIT_UNTIL([test -s daemon && test `cat daemon` != `cat olddaemon`],
[kill `cat olddaemon daemon`])
OVS_WAIT_WHILE([kill -0 `cat olddaemon`], [kill `cat olddaemon daemon`])
OVS_WAIT_UNTIL([test -s daemon && test `cat daemon` != `cat olddaemon`],
[kill `cat olddaemon daemon`])