[src/trunk]: src/usr.sbin/screenblank Add caveats section to the screenblank(...

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

details:   https://anonhg.NetBSD.org/src/rev/ec8b78cfe189
branches:  trunk
changeset: 995589:ec8b78cfe189
user:      gutteridge <gutteridge%NetBSD.org@localhost>
date:      Fri Dec 28 23:53:35 2018 +0000

description:
Add caveats section to the screenblank(1) man page to note issues will
arise if /dev is on a file system mounted with noatime or nodevmtime.

diffstat:

 usr.sbin/screenblank/screenblank.1 |  13 +++++++++++--
 1 files changed, 11 insertions(+), 2 deletions(-)

diffs (31 lines):

diff -r 07f6d3be580e -r ec8b78cfe189 usr.sbin/screenblank/screenblank.1
--- a/usr.sbin/screenblank/screenblank.1        Fri Dec 28 22:55:20 2018 +0000
+++ b/usr.sbin/screenblank/screenblank.1        Fri Dec 28 23:53:35 2018 +0000
@@ -1,4 +1,4 @@
-.\"    $NetBSD: screenblank.1,v 1.15 2008/04/30 13:11:02 martin Exp $
+.\"    $NetBSD: screenblank.1,v 1.16 2018/12/28 23:53:35 gutteridge Exp $
 .\"
 .\" Copyright (c) 1996-2002 The NetBSD Foundation, Inc.
 .\" All rights reserved.
@@ -27,7 +27,7 @@
 .\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 .\" POSSIBILITY OF SUCH DAMAGE.
 .\"
-.Dd September 23, 2006
+.Dd December 28, 2018
 .Dt SCREENBLANK 1
 .Os
 .Sh NAME
@@ -116,3 +116,12 @@
 File containing the pid of
 .Nm .
 .El
+.Sh CAVEATS
+.Nm
+checks the access and modification times of the devices it is
+monitoring to determine activity. If the devices are on a file system
+mounted with the
+.Cm noatime
+and/or
+.Cm nodevmtime
+options, it will not function as expected.