Bug #678077: Suggest alternative to os.getlogin()

Doc/lib/libos.tex

@@ -141,7 +141,9 @@ Availability: \UNIX.
 \begin{funcdesc}{getlogin}{}
 Return the name of the user logged in on the controlling terminal of
 the process.  For most purposes, it is more useful to use the
-environment variable \envvar{LOGNAME} to find out who the user is.
+environment variable \envvar{LOGNAME} to find out who the user is,
+or \code{pwd.getpwuid(os.getuid())[0]} to get the login name
+of the currently effective user ID.
 Availability: \UNIX.
 \end{funcdesc}