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svcmon
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Parts of daemontools reimplemented for FreeBSD with kqueue and subreapers.
Why subreapers?
---------------
Subreapers let us make sure we don't leave any rouge sub processes when
we have to restart the daemon.
Why kqueue?
-----------
By using kqueue for signalhandling and checking if filedescriptors are
ready `svcscan` and `svcsupervise` can spend most of it's time blocking
instead of waking up every few seconds.
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