-Scans an entire directory and adds all fonts found to
-<parameter>set</parameter>. If <parameter>force</parameter> is FcTrue, then
-the directory and all files within it are scanned even if information is
-present in the per-directory cache file or <parameter>cache</parameter>. Any
-subdirectories found are added to <parameter>dirs</parameter>. See the
-manual for <function>FcFileScan</function> for a description of how
-fontconfig selects which fonts to include.
+If <parameter>cache</parameter> is not zero or if <parameter>force</parameter>
+is FcFalse, this function currently returns FcFalse. Otherwise, it scans an
+entire directory and adds all fonts found to <parameter>set</parameter>.
+Any subdirectories found are added to <parameter>dirs</parameter>. Calling
+this function does not create any cache files. Use FcDirCacheRead() if
+caching is desired.