[ 755617 ] os module: Need a better description of "mode"
diff --git a/Doc/lib/libos.tex b/Doc/lib/libos.tex
index e5b5962..3d9056d 100644
--- a/Doc/lib/libos.tex
+++ b/Doc/lib/libos.tex
@@ -764,6 +764,11 @@
\item \code{S_IXOTH}
\end{itemize}
Availability: Macintosh, \UNIX, Windows.
+
+\note{Although Windows supports \function{chmod()}, you can only
+set the file's read-only flag with it (via the \code{S_IWRITE}
+and \code{S_IREAD} constants or a corresponding integer value).
+All other bits are ignored.}
\end{funcdesc}
\begin{funcdesc}{chown}{path, uid, gid}