21 Apr
2020
21 Apr
'20
12:32 a.m.
Derek Fawcus <dfawcus+lists-tuhs(a)employees.org> wrote:
On Mon, Apr 20, 2020 at 08:28:53AM -0600,
arnold(a)skeeve.com wrote:
My bad. I meant /dev/fd/3. What was cute was that /dev/tty was
no longer a special device of it's own, but just another inherited
open file descriptor.
Sadly, that generalization never made it out into other *nix systems.
Arnold
See if there are man pages for /dev/fd/XXX. IIRC
/dev/stdin was
a symlink to /dev/fd/0, /dev/stdout to /dev/fd/1, /dev/stderr to /dev/fd/2,
and, as a really nice generalization, /dev/tty to /dev/fd/4. For the
latter, init(1) simply dup'ed the opened tty file descriptor one more
time before exec-ing login.
So what happened to /dev/fd/3 ?
DF