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-rw-r--r--share/man/man9/socket.917
1 files changed, 12 insertions, 5 deletions
diff --git a/share/man/man9/socket.9 b/share/man/man9/socket.9
index 8320d84914c2..f2cb5bae5b0d 100644
--- a/share/man/man9/socket.9
+++ b/share/man/man9/socket.9
@@ -25,7 +25,7 @@
.\"
.\" $FreeBSD$
.\"
-.Dd December 14, 2006
+.Dd April 12, 2013
.Dt SOCKET 9
.Os
.Sh NAME
@@ -208,12 +208,19 @@ Data may be retrieved directly to kernel or user memory via the
argument, or as an mbuf chain returned to the caller via
.Fa mp0 ,
avoiding a data copy.
-Only one of the
+The
.Fa uio
-or
-.Fa mp0
-pointers may be
+must always be
.Pf non- Dv NULL .
+If
+.Fa mp0
+is
+.Pf non- Dv NULL ,
+only the
+.Pf uio_resid
+of
+.Fa uio
+is used.
The caller may optionally retrieve a socket address on a protocol with the
.Dv PR_ADDR
capability by providing storage via