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From: Ulrich Drepper <drepper@redhat.com>
To: sean finney <seanius@seanius.net>
Cc: linux-kernel@vger.kernel.org
Subject: Re: problem opening multiple pipes with pipe(2) in 2.4.1[78]
Date: Mon, 21 Oct 2002 19:16:55 -0700	[thread overview]
Message-ID: <3DB4B517.1070906@redhat.com> (raw)
In-Reply-To: <20021021213220.A26136@sccs.swarthmore.edu>

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sean finney wrote:

>
> int main(){
> 	int p1[2], p2[2];
> 	pipe(p1);
> 	perror("p1");
> 	pipe(p2);
> 	perror("p2");
> 	return 0;
> }


The fault is entirely yours.  You're not allowed to look at errno unless
a function, which is defined to modify error on failure, is reporting it
failed.  Both pipe() calls work just fine and errno has some random
value which happens to be ESPIPE for you.  Read the standard.

- -- 
- --------------.                        ,-.            444 Castro Street
Ulrich Drepper \    ,-----------------'   \ Mountain View, CA 94041 USA
Red Hat         `--' drepper at redhat.com `---------------------------
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  reply	other threads:[~2002-10-22  2:11 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2002-10-22  1:32 problem opening multiple pipes with pipe(2) in 2.4.1[78] sean finney
2002-10-22  2:16 ` Ulrich Drepper [this message]
2002-10-22  4:39   ` sean finney
2002-10-22 12:43     ` Doug McNaught
2002-10-22 13:23       ` Alan Cox

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