From 513575d446ecb488e677538312ac8cf8e2893a5a Mon Sep 17 00:00:00 2001
From: Warner Losh <imp@FreeBSD.org>
Date: Wed, 26 Aug 2020 17:06:16 +0000
Subject: [PATCH] Make sbuf_setpos match the implementation.

sbuf_setpos can only be used to truncate the buffer, never to make it
longer. Update the documentation to reflect this.

Reviewed By: allanjude, phk
Differential Revision: https://reviews.freebsd.org/D26198
---
 share/man/man9/sbuf.9 | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/share/man/man9/sbuf.9 b/share/man/man9/sbuf.9
index 8f266890c902..071e6f11e02e 100644
--- a/share/man/man9/sbuf.9
+++ b/share/man/man9/sbuf.9
@@ -25,7 +25,7 @@
 .\"
 .\" $FreeBSD$
 .\"
-.Dd August 7, 2019
+.Dd August 26, 2020
 .Dt SBUF 9
 .Os
 .Sh NAME
@@ -370,9 +370,8 @@ function sets the
 .Fa sbuf Ns 's
 end position to
 .Fa pos ,
-which is a value between zero and one less than the size of the
-storage buffer.
-This effectively truncates the sbuf at the new position.
+which is a value between zero and the current position in the buffer.
+It can only truncate the sbuf to the new position.
 .Pp
 The
 .Fn sbuf_bcat