NCP23/F4: Map PATH TO Dir Entry allow Files

src/connect.c

@@ -2347,7 +2347,14 @@ int conn_map_path_to_dir_entry(int dirhandle, uint8 *data, int len,
   if (volume < 0) return(volume);
   if (s_stat(unixname, &stbuff, NULL)) return(-0x9c);
 
-  if (!S_ISDIR(stbuff.st_mode)) return(-0x9c);
+  /*
+   * NCP23/F4 maps a path to a namespace entry number.  Despite the
+   * historical "Dir Entry" wording, clients may use the returned number
+   * for file entries as well as directory entries, and NCP23/F3 maps that
+   * number back to a component path.  Therefore do not reject regular
+   * files here; any stat'able volume entry that can be represented by the
+   * namespace handle table is valid.
+   */
 
   {
     DEV_NAMESPACE_MAP dnm;