From TFS¹, creat() on an existing file truncates it (i.e. to length zero, as O_TRUNC), and only the superuser can do this to a directory. open() has read/write

From TFS¹, creat() on an existing file truncates it (i.e. to length zero, as O_TRUNC), and only the superuser can do this to a directory. open() has read/write flag bits as now. I am leaning toward Pete_D's ‘pack directory’ idea. ¹ https://github.com/DoctorWkt/pdp7-unix/blob/e94417092a2980e758fd536a3d9f59fb168d5e54/src/sys/s2.s#L239 https://github.com/DoctorWkt/pdp7-unix/blob/e94417092a2980e7...