From 2a065c7bf07356bbc84ff330f04ecf38d851febf Mon Sep 17 00:00:00 2001
From: alfred <alfred@FreeBSD.org>
Date: Tue, 11 Dec 2012 01:28:06 +0000
Subject: Allow sysctl to filter boot and runtime tunables.

Add the following flags to sysctl:
 -W  - show only writable sysctls
 -T  - show only tuneable sysctls

This can be used to create a /var/run/sysctl.boot to
compare set tunables versus booted tunables.

Sponsored by: iXsystems
---
 sbin/sysctl/sysctl.8 | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

(limited to 'sbin/sysctl/sysctl.8')

diff --git a/sbin/sysctl/sysctl.8 b/sbin/sysctl/sysctl.8
index be43e68..514acd1 100644
--- a/sbin/sysctl/sysctl.8
+++ b/sbin/sysctl/sysctl.8
@@ -36,11 +36,11 @@
 .Nd get or set kernel state
 .Sh SYNOPSIS
 .Nm
-.Op Fl bdehiNnoqx
+.Op Fl bdehiNnoRTqx
 .Ar name Ns Op = Ns Ar value
 .Ar ...
 .Nm
-.Op Fl bdehNnoqx
+.Op Fl bdehNnoRTqx
 .Fl a
 .Sh DESCRIPTION
 The
@@ -121,6 +121,11 @@ sixteen bytes of the value.
 Suppress some warnings generated by
 .Nm
 to standard error.
+.It Fl T
+Display only variables that are setable via loader (CTLFLAG_TUN).
+.It Fl W
+Display only wriable variables that are not statistical.
+Useful for determining the set of runtime tunable sysctls.
 .It Fl X
 Equivalent to
 .Fl x a
-- 
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