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From: Eli Barzilay <>
Subject: Repost: Bug with select?
Date: Thu, 24 Jul 2003 01:28:10 -0400	[thread overview]
Message-ID: <> (raw)
In-Reply-To: <>

[This is a second post, since I didn't get any replies the first time.
It looks more like a bug now, which sounds strange for something that

When I run the following program, and block the terminal's output
(C-s), the `select' doesn't seem to have any effect, resulting in a
100% cpu usage (this is on a RH8, with 2.4.18).  I wouldn't be
surprised if I'm doing something stupid, but it does seem to work fine
on Solaris.

Is there anything wrong with this, or is this some bug?

#include <unistd.h>
#include <fcntl.h>
int main() {
  int flags, fd, len; fd_set writefds;
  fd = 1;
  flags = fcntl(fd, F_GETFL, 0);
  fcntl(fd, F_SETFL, flags | O_NONBLOCK);
  while (1) {
    FD_SET(fd, &writefds);
    len = select(fd + 1, NULL, &writefds, NULL, NULL);
    if (!FD_ISSET(fd,&writefds)) exit(0);
    len = write(fd, "hi\n", 3);
  fcntl(fd, F_SETFL, flags);

          ((lambda (x) (x x)) (lambda (x) (x x)))          Eli Barzilay:
                         Maze is Life!

  reply	other threads:[~2003-07-24  5:13 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2003-06-18  8:49 Problem " Eli Barzilay
2003-07-24  5:28 ` Eli Barzilay [this message]
2003-07-25 13:41   ` Repost: Bug " Marco Roeland
2003-07-26  0:20     ` Ben Greear
2003-07-26  9:05       ` Marco Roeland
2003-07-26  0:35   ` Philippe Troin
2003-07-26 14:29     ` Eli Barzilay
2003-07-26 14:25   ` Eli Barzilay
2003-07-26 15:37     ` Marco Roeland
2003-07-27 19:29 Manfred Spraul

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