Querying kernel features
Kristof Provost
kp at FreeBSD.org
Thu Jun 18 20:57:54 UTC 2020
Say that I have a test for an optional kernel feature (say ALTQ, or
TMPFS) is there an elegant way of figuring out at runtime if it’s
available?
Doing `sysctl kern.conftxt | grep ALTQ` feels a little inelegant, and is
begging for issues with incorrect matches.
I’m tempted to add a sysctl node for ALTQ, but perhaps there’s a
better way. Or perhaps this should be a general feature (so we’d have
nodes like kernel.feature.tmpfs=1).
Regards,
Kristof
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