Back out changes unrelated to the ENAMETOOLONG diff.

diff --git a/lib/libc/sys/intro.2 b/lib/libc/sys/intro.2
index 9da12f0..803bf81 100644 (file)
--- a/lib/libc/sys/intro.2
+++ b/lib/libc/sys/intro.2
@@ -1,4 +1,4 @@
-.\"    $OpenBSD: intro.2,v 1.56 2015/01/17 13:37:59 millert Exp $
+.\"    $OpenBSD: intro.2,v 1.57 2015/01/19 13:59:16 millert Exp $
 .\"    $NetBSD: intro.2,v 1.6 1995/02/27 12:33:41 cgd Exp $
 .\"
 .\" Copyright (c) 1980, 1983, 1986, 1991, 1993
@@ -30,7 +30,7 @@
 .\"
 .\"     @(#)intro.2    8.3 (Berkeley) 12/11/93
 .\"
-.Dd $Mdocdate: January 17 2015 $
+.Dd $Mdocdate: January 19 2015 $
 .Dt INTRO 2
 .Os
 .Sh NAME
@@ -46,20 +46,18 @@ their error returns, and other common definitions and concepts.
 .\".Pp
 .\"<more later...>
 .Sh DIAGNOSTICS
-Nearly all of the system calls provide an error number via the identifier
-.Dv errno ,
-which expands to an addressable location of type
-.Vt int .
-The address of
-.Va errno
-in each thread is guaranteed to be unique for the lifetime of thread
-thread.
-Applications must use
+Nearly all of the system calls provide an error number in the external
+variable
+.Va errno ,
+which is currently defined as:
+.Pp
+.Dl extern int errno;
+.Pp
+Portable applications must not depend on this definition, and should only
+use
 .Va errno
 as defined in
-.In errno.h
-and not attempt to use a custom definition.
-.Pp
+.In errno.h .
 When a system call detects an error, it returns an integer value
 indicating failure (usually \-1) and sets the variable
 .Va errno
@@ -78,7 +76,7 @@ The following is a complete list of the errors and their
 names as given in
 .In sys/errno.h .
 .Bl -hang -width Ds
-.It Er 0 Em "Undefined error: 0" .
+.It Er 0 Em "Error 0" .
 Not used.
 .It Er 1 EPERM Em "Operation not permitted" .
 An attempt was made to perform an operation limited to processes