Index: dup.2
===================================================================
RCS file: /cvs/src/lib/libc/sys/dup.2,v
retrieving revision 1.17
diff -u -p -r1.17 dup.2
--- dup.2 31 Aug 2014 01:42:36 -0000 1.17
+++ dup.2 10 Dec 2014 12:20:09 -0000
@@ -129,6 +129,7 @@ is zero then
is identical to a call to
.Fn dup2 .
.Sh RETURN VALUES
+Upon successful completion, the value of the new descriptor is returned.
The value \-1 is returned if an error occurs in either call.
The external variable
.Va errno
