[src/trunk]: src/sbin/rndctl rndctl.8: reflect current reality

[nia <nia%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/874e0a0c5209
branches:  trunk
changeset: 1020163:874e0a0c5209
user:      nia <nia%NetBSD.org@localhost>
date:      Fri Apr 02 07:04:05 2021 +0000

description:
rndctl.8: reflect current reality

diffstat:

 sbin/rndctl/rndctl.8 |  26 +++++++++++++-------------
 1 files changed, 13 insertions(+), 13 deletions(-)

diffs (63 lines):

diff -r 34baa7f20069 -r 874e0a0c5209 sbin/rndctl/rndctl.8
--- a/sbin/rndctl/rndctl.8      Fri Apr 02 07:00:33 2021 +0000
+++ b/sbin/rndctl/rndctl.8      Fri Apr 02 07:04:05 2021 +0000
@@ -1,4 +1,4 @@
-.\"    $NetBSD: rndctl.8,v 1.26 2020/05/07 19:09:26 riastradh Exp $
+.\"    $NetBSD: rndctl.8,v 1.27 2021/04/02 07:04:05 nia Exp $
 .\"
 .\" Copyright (c) 1997 Michael Graff
 .\" All rights reserved.
@@ -26,7 +26,7 @@
 .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 .\" SUCH DAMAGE.
 .\"
-.Dd August 10, 2014
+.Dd April 2, 2021
 .Dt RNDCTL 8
 .Os
 .Sh NAME
@@ -56,11 +56,9 @@
 The following options are available:
 .Bl -tag -width 123456
 .It Fl C
-Disable collection of timing information for the given
-device name or device type.
+Disable collection of data for the given device name or device type.
 .It Fl c
-Enable collection of timing information for the given
-device name or device type.
+Enable collection of data for the given device name or device type.
 .It Fl d
 Only the device named
 .Ar devname
@@ -68,14 +66,15 @@
 This is mutually exclusive with
 .Fl t .
 .It Fl E
-Disable entropy estimation from the collected timing information for
-the given device name or device type.
-If collection is still enabled, timing information is still
-collected and mixed into the internal entropy pool,
-but no entropy is assumed to be present.
+Disable entropy estimation for the given device name or device type.
+If collection is still enabled, data is still collected and mixed into
+the internal entropy pool, but no entropy is assumed to be present.
 .It Fl e
-Enable entropy estimation using the collected timing information
-for the given device name or device type.
+Re-enable entropy estimation for the given device name or device type.
+If the kernel's estimate for the given device is zero, as it is for
+devices of types other than
+.Ic rng ,
+this does not increase the estimate.
 .It Fl i
 With the
 .Fl L
@@ -138,6 +137,7 @@
 .El
 .Sh SEE ALSO
 .Xr rnd 4 ,
+.Xr entropy 7 ,
 .Xr rnd 9
 .Sh HISTORY
 The