reference the os module and the lock flags in the os.open() function.
(Someone please review what I wrote for accuracy.)
diff --git a/Doc/lib/libfcntl.tex b/Doc/lib/libfcntl.tex
index 33a5893..645a97e 100644
--- a/Doc/lib/libfcntl.tex
+++ b/Doc/lib/libfcntl.tex
@@ -118,3 +118,11 @@
value. The structure lay-out for the \var{lockdata} variable is
system dependent --- therefore using the \function{flock()} call may be
better.
+
+\begin{seealso}
+ \seemodule{os}{The \function{os.open} function supports locking flags
+ and is available on a wider variety of platforms than
+ the \function{fcntl.lockf} and \function{fcntl.flock}
+ functions, providing a more platform-independent file
+ locking facility.}
+\end{seealso}