backport patch [ 1213031 ] note that os.chown can have -1 as an argument

diff --git a/Doc/lib/libos.tex b/Doc/lib/libos.tex
index e15528f09c4b4c2fb4123f5609cdeec930ab65c2..5ac099e97980d831081a43a3511232fb16452b53 100644 (file)
--- a/Doc/lib/libos.tex
+++ b/Doc/lib/libos.tex
@@ -750,7 +750,7 @@ Availability: Macintosh, \UNIX, Windows.
 
 \begin{funcdesc}{chown}{path, uid, gid}
 Change the owner and group id of \var{path} to the numeric \var{uid}
-and \var{gid}.
+and \var{gid}. To leave one of the ids unchanged, set it to -1.
 Availability: Macintosh, \UNIX.
 \end{funcdesc}