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From: Eitan Adler <eadler@FreeBSD.org>
Date: Thu, 3 May 2012 16:19:42 +0000 (UTC)
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Subject: svn commit: r234963 - stable/9/lib/libc/gen
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Author: eadler
Date: Thu May  3 16:19:41 2012
New Revision: 234963
URL: http://svn.freebsd.org/changeset/base/234963

Log:
  MFC r234714, r234700:
  	Document the standardization status of err* and warn*
  
  PR:		docs/164939
  Approved by:	cperciva (implicit)

Modified:
  stable/9/lib/libc/gen/err.3
Directory Properties:
  stable/9/lib/libc/   (props changed)

Modified: stable/9/lib/libc/gen/err.3
==============================================================================
--- stable/9/lib/libc/gen/err.3	Thu May  3 16:09:44 2012	(r234962)
+++ stable/9/lib/libc/gen/err.3	Thu May  3 16:19:41 2012	(r234963)
@@ -28,7 +28,7 @@
 .\"	From: @(#)err.3	8.1 (Berkeley) 6/9/93
 .\" $FreeBSD$
 .\"
-.Dd March 6, 1999
+.Dd March 29, 2012
 .Dt ERR 3
 .Os
 .Sh NAME
@@ -212,6 +212,18 @@ if (error != 0)
 .Xr printf 3 ,
 .Xr strerror 3 ,
 .Xr sysexits 3
+.Sh STANDARDS
+The
+.Fn err
+and
+.Fn warn
+families of functions are
+.Bx
+extensions.
+As such they should not be used in truly portable code.
+Use
+.Fn strerror
+or similar functions instead.
 .Sh HISTORY
 The
 .Fn err