From: Stefan Monnier <monnier@iro.umontreal.ca>
Subject: Re: vc-annotate not displaying all lines
Date: Fri, 10 Dec 2004 21:07:37 GMT [thread overview]
Message-ID: <jwv4qitzx6h.fsf-monnier+gnu.emacs.help@gnu.org> (raw)
In-Reply-To: 877jnqehar.fsf@dod.no
>> (ssh "$@" 2>&1 1>&3 | cat) 3>&1 1>&2
> I'm trying to figure out what it does. Lesse... ssh is run in a
> subshell. Then stdout is gated to a different file descriptor, and
> stderr is gated to the file descriptor used by stdout.
> Then the stderr stuff is sent through a pipe and into cat. Outside
> the subshell stdout and stderr are routed back to their standard file
> descriptors.
> I guess the effect is to delay stderr a bit, wrt. to stdout...?
No, the effect is to separate the stderr of ssh from the stderr of cvs, and
then link them via `cat' to "hide" the difference.
SSH puts his stderr in non-blocking mode whereas CVS doesn't work reliably
if his stderr is non-blocking (and even worse if his stdout is non-blocking
which would happen if the programm running CVS (e.g. Emacs) redirects stdout
and stderr of CVS to the same file descriptor).
Stefan
next prev parent reply other threads:[~2004-12-10 21:07 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-12-09 9:58 vc-annotate not displaying all lines Steinar Bang
2004-12-10 3:35 ` Stefan Monnier
2004-12-10 7:36 ` Steinar Bang
2004-12-10 21:07 ` Stefan Monnier [this message]
2004-12-10 10:57 ` Steinar Bang
2004-12-10 21:08 ` Stefan Monnier
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