On Do, 2023-02-16 at 09:24 -0500, KenUnix wrote: > > * - I'm not sure where they hid errno if there was one. I'd think > * there had to be. Maybe Kernighan or Pike knows... It's a .comm variable, as you can see, e.g., in /usr/src/libc/crt/cerror.s in Keith Bostic's V7. Hellwig