From: Johannes Sixt <j.sixt@viscovery.net>
To: Jeff King <peff@peff.net>
Cc: "Clemens Buchacher" <drizzd@aon.at>,
"Zbigniew Jędrzejewski-Szmek" <zbyszek@in.waw.pl>,
git@vger.kernel.org, gitster@pobox.com
Subject: Re: [PATCH] t5570: forward git-daemon messages in a different way
Date: Thu, 19 Apr 2012 08:58:01 +0200 [thread overview]
Message-ID: <4F8FB779.60004@viscovery.net> (raw)
In-Reply-To: <20120419060326.GA13982@sigill.intra.peff.net>
Am 4/19/2012 8:03, schrieb Jeff King:
> mkfifo fd
> yes >fd &
> pid=$!
> {
> read line
> echo $line
> cat <fd &
> } <fd
> sleep 1
> kill $pid
> wait $pid
> rm -f fd
...
> Hmm. Yeah, if you strace the cat, it gets an immediate EOF. And even
> weirder, I notice this in the strace output:
>
> clone(...)
> close(0) = 0
> open("/dev/null", O_RDONLY) = 0
> ...
> execve("/bin/cat", ["cat"], [/* 50 vars */]) = 0
>
> What? The shell is literally redirecting the cat process's stdin from
> /dev/null. I'm totally confused.
You don't have to be; it's mandated by POSIX:
http://pubs.opengroup.org/onlinepubs/9699919799/utilities/V3_chap02.html#tag_18_09_03_02
-- Hannes
next prev parent reply other threads:[~2012-04-19 6:58 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-04-14 8:44 [PATCH] t5570: forward git-daemon messages in a different way Zbigniew Jędrzejewski-Szmek
2012-04-14 12:13 ` Clemens Buchacher
2012-04-14 12:21 ` Clemens Buchacher
2012-04-16 15:43 ` Zbigniew Jędrzejewski-Szmek
2012-04-16 17:09 ` Junio C Hamano
2012-04-16 21:22 ` Clemens Buchacher
2012-04-16 22:06 ` Zbigniew Jędrzejewski-Szmek
2012-04-17 15:43 ` Junio C Hamano
2012-04-16 17:42 ` Jeff King
2012-04-16 22:44 ` Clemens Buchacher
2012-04-19 6:03 ` Jeff King
2012-04-19 6:58 ` Johannes Sixt [this message]
2012-04-26 13:01 ` Jeff King
2012-04-26 18:16 ` Johannes Sixt
2012-04-26 19:55 ` Clemens Buchacher
2012-04-26 21:00 ` [PATCH] t5570: fix forwarding of git-daemon messages via cat Johannes Sixt
2012-04-26 21:10 ` Zbigniew Jędrzejewski-Szmek
2012-04-27 7:59 ` Jeff King
2012-04-27 15:02 ` Junio C Hamano
2012-04-27 7:55 ` [PATCH] t5570: forward git-daemon messages in a different way Jeff King
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