On Wed, 2 Oct 2024 20:36:48 -0400, Arne Vajhøj wrote: > Terminal: yes. > > Mailboxes: yes. > > Tapes: yes. > > Disk file: not so much. I dabbled with that, too. How do you think RMS was implemented? > But the C code cannot use it as a file descriptor. The C runtime can wrap it in the same sort of thing it does for any other channel.