bug [ 872769 ] os.access() documentation should stress race conditions
diff --git a/Doc/lib/libos.tex b/Doc/lib/libos.tex
index 2fbe669..e5b5962 100644
--- a/Doc/lib/libos.tex
+++ b/Doc/lib/libos.tex
@@ -680,6 +680,11 @@
\constant{False} if not.
See the \UNIX{} man page \manpage{access}{2} for more information.
Availability: Macintosh, \UNIX, Windows.
+
+\note{Using \function{access()} to check if a user is authorized to e.g.
+open a file before actually doing so using \function{open()} creates a
+security hole, because the user might exploit the short time interval
+between checking and opening the file to manipulate it.}
\end{funcdesc}
\begin{datadesc}{F_OK}