Date: Wed, 9 May 2012 09:05:47 -0700 From: Garrett Cooper <yanegomi@gmail.com> To: "hackers@FreeBSD.org" <hackers@FreeBSD.org> Subject: Thoughts about kenv emulating sysctl Message-ID: <D213F695-E85A-407F-92F1-469FD00A0963@gmail.com>
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Hi Hackers,
I've been asked to write up a script to analyze tunables via kenv for archival purposes an to establish a baseline set of static variables.
In order to make life easier (and be able to do all the grunt work in a shell one-liner instead of introducing a bug prone tunable parser) I have written up a patch which would make kenv function a bit more like sysctl, wrt the fact that sysctl -n suppresses suffixing a value with the variable name when executed like so:
# kenv LINES
LINES="24"
# kenv -n LINES
24
I've also considered keeping the functional defaults and instead do the following...
# kenv -v LINES
LINES="24"
# kenv LINES
24
Pro of the first form is that it matches sysctl, pro of the second form is that it doesn't break backwards 'compatibility'.
I know kenv isn't a widely used utility (albeit, I have seen it used in a few spots outside of FreeBSD proper), but I was wondering if anyone could see any potential pitfalls or would have a large degree of heartburn over changing the default to match sysctl.
Thanks!
-Garrett
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