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Date: Thu, 24 Apr 2003 11:33:14 -0700
To: Linux kernel mailing list <linux-kernel@vger.kernel.org>,
       Jeff Garzik <jgarzik@pobox.com>, davem@redhat.com, kuznet@ms2.inr.ac.ru
Subject: [BUG 2.5.X] pipe/fcntl/F_GETFL/F_SETFL obvious kernel bug
Message-ID: <20030424183313.GA17374@bougret.hpl.hp.com>
Reply-To: jt@hpl.hp.com
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Organisation: HP Labs Palo Alto
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E-mail: jt@hpl.hp.com
From: Jean Tourrilhes <jt@bougret.hpl.hp.com>
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	Hi,

	I reported this obvious kernel 2.5.X bug 6 months ago, and as
of 2.5.67 it is still not fixed. Do you know who I should send this
bug report to ?
	Thanks...

	Jean

---------------------------------------------
	Compile test program below.
	On 2.5.67 :
GET FLAGS : 0 - 40044F18
SET FLAGS : -1 - 22
	On 2.4.21-pre7 :
GET FLAGS : 0 - 40043F18
SET FLAGS : 0 - 0
---------------------------------------------
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include <stdio.h>

int main()
{
  int trigger_pipe[2];
  int err;
  int flags;

  pipe(trigger_pipe);

  err = fcntl(trigger_pipe[0], F_GETFL, &flags);
  fprintf(stderr, "GET FLAGS : %d - %X\n", err, flags);
  if(err >= 0)
    {
      flags |= O_NONBLOCK;
      //flags |= O_NDELAY;
      //flags &= ~O_NDELAY;
      err = fcntl(trigger_pipe[0], F_SETFL, flags);
      fprintf(stderr, "SET FLAGS : %d - %d\n", err, errno);
    }
  return(0);
}