Document m_dup_pkthdr function.

ok claudio@

1 files changed, 9 insertions, 2 deletions

diff --git a/share/man/man9/mbuf.9 b/share/man/man9/mbuf.9
index f216ad58663..512f04067a5 100644
--- a/share/man/man9/mbuf.9
+++ b/share/man/man9/mbuf.9
@@ -1,4 +1,4 @@
-.\"     $OpenBSD: mbuf.9,v 1.49 2011/01/30 16:51:38 jmc Exp $
+.\"     $OpenBSD: mbuf.9,v 1.50 2011/04/03 09:49:24 blambert Exp $
 .\"
 .\" Copyright (c) 2001 Jean-Jacques Bernard-Gundol <jjbg@openbsd.org>
 .\" All rights reserved.
@@ -25,7 +25,7 @@
 .\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 .\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 .\"
-.Dd $Mdocdate: January 30 2011 $
+.Dd $Mdocdate: April 3 2011 $
 .Dt MBUF 9
 .Os
 .Sh NAME
@@ -93,6 +93,8 @@
 .Fn M_READONLY "struct mbuf *m"
 .Fn M_LEADINGSPACE "struct mbuf *m"
 .Fn M_TRAILINGSPACE "struct mbuf *m"
+.Ft int
+.Fn m_dup_pkthder "struct mbuf *to" "struct mbuf *from"
 .Bd -literal
 #define MLEN            (MSIZE - sizeof(struct m_hdr))
 #define MHLEN           (MLEN - sizeof(struct pkthdr))
@@ -682,6 +684,11 @@ in the mbuf pointed to by
 Compute the amount of space available after the end of data in the
 mbuf pointed to by
 .Fa m .
+.It Fn m_dup_pkthdr "struct mbuf *to" "struct mbuf *from"
+Copy mbuf packet header, including mbuf tags, from
+.Fa from
+to
+.Fa to .
 .El
 .Sh CODE REFERENCES
 The mbuf management functions are implemented in the files