supervision - discussion about system services, daemon supervision, init, runlevel management, and tools such as s6 and runit
 help / color / mirror / Atom feed
From: Laurent Bercot <ska-supervision@skarnet.org>
To: supervision@list.skarnet.org
Subject: Re: redirection tricks on processor invocation
Date: Wed, 3 Jun 2009 08:26:58 +0200	[thread overview]
Message-ID: <20090603062658.GB5167@skarnet.org> (raw)
In-Reply-To: <20090602104820.GB80818@grummit.biaix.org>

> In summary, I want a copy of my processor's stdin to be seen by svlogd
> as my processor's stdout. Any ideas?

 Use multitee: http://code.dogmap.org/fdtools/multitee/

 Your processor could be, for instance, if you have execline installed:
 exec execlineb -c "
  piperw 6 7
  background { fdclose 7 fdmove 0 6 yourapplication }
  fdclose 6
  multitee 0-1,7
 "

 which copies stdin to stdout untouched, but also feeds a copy of
stdin to yourapplication's stdin.

-- 
 Laurent


  reply	other threads:[~2009-06-03  6:26 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-06-02 10:48 Joan Picanyol i Puig
2009-06-03  6:26 ` Laurent Bercot [this message]
2009-06-03 10:31   ` Joan Picanyol i Puig
2009-06-03 10:38     ` Joan Picanyol i Puig
2009-06-12 11:48       ` Joan Picanyol i Puig
2009-06-13  5:13         ` Laurent Bercot

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=20090603062658.GB5167@skarnet.org \
    --to=ska-supervision@skarnet.org \
    --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).