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On each resolver query, use stat(2) to see if the modification time of /etc/resolv.conf has changed. If so, reload the file and reinitialize the resolver library. However, only call stat(2) if at least two seconds have passed since the last call to stat(2), since calling it on every query could kill performance. This new behavior is enabled by default. Add a "reload-period" option to disable it or change the period of the test. Document this behavior and option in resolv.conf(5). Polish the man page just enough to appease igor. https://lists.freebsd.org/pipermail/freebsd-arch/2015-October/017342.html Reviewed by: kp, wblock Discussed with: jilles, imp, alfred MFC after: 1 month Relnotes: yes Sponsored by: Dell Inc. Differential Revision: https://reviews.freebsd.org/D3867 |
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