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To: linux-kernel@vger.kernel.org
From: Halesh S <halesh.sadashiv@ap.sony.com>
Subject: Regarding select() on PPC
Date: Fri, 19 Sep 2008 14:04:11 +0000 (UTC)
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Hi all,

Please find the below testcase.

#include <stdio.h>
#include <sys/time.h>
#include <sys/types.h>
#include <unistd.h>
#include <fcntl.h>
#include <string.h>
#include <time.h>
#include <errno.h>
#include <stdlib.h>

int main()
{

 int fd;
 fd_set rfds;
 struct timeval tv;
 int ret_val;

 if ((fd = open("test_file", O_RDWR|O_CREAT, 0664)) < 0)
  {
    printf("Open failed\n");
  }

  FD_ZERO(&rfds);
  FD_SET(fd, &rfds);

  /* Wait up to five seconds. */
  tv.tv_sec = 1;
  tv.tv_usec = 0;

  if ( (ret_val = select(-1, &rfds, NULL, NULL, &tv)) < 0)
  {
    if (errno == EINVAL)
      printf("OK\n");
    else
      printf("Not OK, Got errno %d\n", errno);
  }
  exit(0);
}


For negetive value of n (first argument to select) select fails with
EINVAL error,

But for the same when I tested for PowerPC it was giving EFAULT, 
Its on 2.6.16 kernel.

Please let me know, If this is fixed or it's a issue in PPC.
For other archs its working fine.


Thanks,
Halesh