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From: Eitan Adler <eadler@FreeBSD.org>
Date: Thu, 26 Apr 2012 12:59:08 +0000 (UTC)
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Subject: svn commit: r234700 - head/lib/libc/gen
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Author: eadler
Date: Thu Apr 26 12:59:08 2012
New Revision: 234700
URL: http://svn.freebsd.org/changeset/base/234700

Log:
  Document the standardization status of err* and warn*
  
  PR:		docs/164939
  Submitted by:	Niclas Zeising <zeising@daemonic.se>
  Approved by:	bcr
  MFC after:	3 days

Modified:
  head/lib/libc/gen/err.3

Modified: head/lib/libc/gen/err.3
==============================================================================
--- head/lib/libc/gen/err.3	Thu Apr 26 11:07:15 2012	(r234699)
+++ head/lib/libc/gen/err.3	Thu Apr 26 12:59:08 2012	(r234700)
@@ -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 +212,16 @@ if (error != 0)
 .Xr printf 3 ,
 .Xr strerror 3 ,
 .Xr sysexits 3
+.Sh STANDARDS
+The
+.Fn err
+and
+.Fn warn
+families of functions are BSD extensions.
+As such they should not be used in truly portable code.
+Use
+.Fn strerror
+or similar functions instead.
 .Sh HISTORY
 The
 .Fn err