document MSG_NOSIGNAL.

1 files changed, 21 insertions, 6 deletions

diff --git a/lib/libc/sys/send.2 b/lib/libc/sys/send.2
index 705e2b2f7b2..8f6cf8c8b98 100644
--- a/lib/libc/sys/send.2
+++ b/lib/libc/sys/send.2
@@ -1,4 +1,4 @@
-.\"	$OpenBSD: send.2,v 1.23 2007/05/31 19:19:33 jmc Exp $
+.\"	$OpenBSD: send.2,v 1.24 2011/12/03 12:41:33 fgsch Exp $
 .\"	$NetBSD: send.2,v 1.6 1996/01/15 01:17:18 thorpej Exp $
 .\"
 .\" Copyright (c) 1983, 1991, 1993
@@ -30,7 +30,7 @@
 .\"
 .\"     @(#)send.2	8.2 (Berkeley) 2/21/94
 .\"
-.Dd $Mdocdate: May 31 2007 $
+.Dd $Mdocdate: December 3 2011 $
 .Dt SEND 2
 .Os
 .Sh NAME
@@ -94,10 +94,16 @@ send more data.
 The
 .Fa flags
 parameter may include one or more of the following:
-.Bd -literal
-#define	MSG_OOB        0x1  /* process out-of-band data */
-#define	MSG_DONTROUTE  0x4  /* bypass routing, use direct interface */
-.Ed
+.Pp
+.Bl -tag -width "MSG_DONTROUTEXX" -offset indent -compact
+.It Dv MSG_OOB
+process out-of-band data
+.It Dv MSG_DONTROUTE
+bypass routing, use direct interface
+.It Dv MSG_NOSIGNAL
+don't send
+.Dv SIGPIPE 
+.El
 .Pp
 The flag
 .Dv MSG_OOB
@@ -110,6 +116,11 @@ the underlying protocol must also support
 data.
 .Dv MSG_DONTROUTE
 is usually used only by diagnostic or routing programs.
+.Dv MSG_NOSIGNAL
+is used to request not to send the
+.Dv SIGPIPE
+signal if an attempt to send is made on a socket that is shut down for
+writing or no longer connected.
 .Pp
 See
 .Xr recv 2
@@ -172,6 +183,10 @@ This error can only be returned by connected sockets.
 The socket is not connected, and no destination address was specified.
 .It Bq Er EISCONN
 The socket is already connected, and a destination address was specified.
+.It Bq Er EPIPE
+The socket is shut down for writing or not longer connected and the
+.Dv MSG_NOSIGNAL
+flag is set.
 .El
 .Pp
 In addition,