 * Use Tcl_GetErrno()
 * Use TCL_THREADS
 * Check my patches for tcl-inotify.
 * The following further bits can be specified in mask when calling inotify_add_watch(2):
         Bit              Description
         IN_DONT_FOLLOW   Don't dereference pathname if it is a symbolic link
                          (Since Linux 2.6.15)
         IN_MASK_ADD      Add (OR) events to watch mask for this pathname if
                          it already exists (instead of replacing mask)
 * Create tests with "tcltest".

Also:
Look for "TODO" in the code.
Or
grep -R TODO *
