supervision - discussion about system services, daemon supervision, init, runlevel management, and tools such as s6 and runit
 help / color / mirror / Atom feed
From: Kian Kasad <kian@kasad.com>
To: supervision@list.skarnet.org
Subject: runit: run process in a tty
Date: Fri, 16 Oct 2020 17:35:45 -0700	[thread overview]
Message-ID: <20201017003545.6k2vys6psg4izccg@frisbee> (raw)

[-- Attachment #1: Type: text/plain, Size: 636 bytes --]

I'm trying to have a runit service spawn `/usr/bin/ly` in a certain tty
(tty2). I've tried redirecting std{in,out,err} to the tty:

exec /usr/bin/ly </dev/tty2 >/dev/tty2 2>&1

but this didn't work.

I tried the openvt(1) program, which has a flag `-e` to exec the program
instead of forking it:

openvt -ec 2 /usr/bin/ly

This returned an error:
Unable to open file: /dev/tty2: Operation not permitted.

However, openvt(1) works when using the `-w` (wait) flag instead of `-e`
(exec). So my questions are:
- Does anyone know why this happens?
- Is there a better way to spawn a process on a certain tty with runit?

Thanks,
Kian Kasad

[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 228 bytes --]

             reply	other threads:[~2020-10-17  0:35 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-10-17  0:35 Kian Kasad [this message]
2020-10-17  4:50 ` Érico Nogueira
2020-10-17 10:43 ` Jonathan de Boyne Pollard

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20201017003545.6k2vys6psg4izccg@frisbee \
    --to=kian@kasad.com \
    --cc=supervision@list.skarnet.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).