svn commit: r252622 - stable/9/lib/libc/sys
Jilles Tjoelker
jilles at FreeBSD.org
Wed Jul 3 22:04:35 UTC 2013
Author: jilles
Date: Wed Jul 3 22:04:35 2013
New Revision: 252622
URL: http://svnweb.freebsd.org/changeset/base/252622
Log:
MFC r248774: accept(2): Mention inheritance of O_ASYNC and signal
destination.
While almost nobody uses O_ASYNC, and rightly so, the inheritance of the
related properties across accept() is a portability issue like the
inheritance of O_NONBLOCK.
Modified:
stable/9/lib/libc/sys/accept.2
Directory Properties:
stable/9/lib/libc/ (props changed)
stable/9/lib/libc/sys/ (props changed)
Modified: stable/9/lib/libc/sys/accept.2
==============================================================================
--- stable/9/lib/libc/sys/accept.2 Wed Jul 3 22:03:19 2013 (r252621)
+++ stable/9/lib/libc/sys/accept.2 Wed Jul 3 22:04:35 2013 (r252622)
@@ -28,7 +28,7 @@
.\" @(#)accept.2 8.2 (Berkeley) 12/11/93
.\" $FreeBSD$
.\"
-.Dd December 11, 1993
+.Dd March 26, 2013
.Dt ACCEPT 2
.Os
.Sh NAME
@@ -57,7 +57,13 @@ queue of pending connections, creates a
and allocates a new file descriptor for the socket which
inherits the state of the
.Dv O_NONBLOCK
-property from the original socket
+and
+.Dv O_ASYNC
+properties and the destination of
+.Dv SIGIO
+and
+.Dv SIGURG
+signals from the original socket
.Fa s .
.Pp
If no pending connections are
@@ -129,7 +135,11 @@ to pre-process incoming connections.
.Pp
Portable programs should not rely on the
.Dv O_NONBLOCK
-property being inherited.
+and
+.Dv O_ASYNC
+properties and the signal destination being inherited,
+but should set them explicitly using
+.Xr fcntl 2 .
.Sh RETURN VALUES
The call returns \-1 on error.
If it succeeds, it returns a non-negative
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