<<On Sat, 30 Aug 2003 12:23:35 -0400 (EDT), Robert Watson <rwatson_at_freebsd.org> said: > The only way to close this sort of race is to have a notion of a > unique process identifier that lasts beyond the lifetime of the > process itself -- i.e., the ability to return EMYSINCERESTREGRESTS > if you try to signal a process after it has died, and have a > guarantee that the handle won't be reused. This is traditionally done by holding an advisory lock on the pid file; if the file is no longer locked, then the process holding the lock must have exited. You could also do it with UUIDs and a more heavyweight signal API. -GAWollmanReceived on Sat Aug 30 2003 - 10:05:50 UTC
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