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Re: [patch] aio_*() posix compliance


The test program was assuming the existence of /etc/resolv.conf.  I
changed this so that it creates a private temp file to write to and read
from with the mkstemp() function.  Also, I changed the check for return
of -1 and EAGAIN in the aio_suspend() test to be a logical and.  Here is
the corrected version:

---- Begin tst-aio7.c ----

/* Test for AIO POSIX compliance.
   Copyright (C) 2000 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, write to the Free
   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
   02111-1307 USA.  */

#include <aio.h>
#include <error.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>


/* We might wait for 3 seconds, so increase timeout to 10 seconds.  */
#define TIMEOUT 10


#define TEST_FUNCTION do_test ()
static int
do_test (void)
{
  int result = 0;

  /* Test for aio_cancel() detecting invalid file descriptor.  */
  {
    struct aiocb cb;
    int fd = -1;

    cb.aio_fildes = fd;
    cb.aio_offset = 0;
    cb.aio_buf = NULL;
    cb.aio_nbytes = 0;
    cb.aio_reqprio = 0;
    cb.aio_sigevent.sigev_notify = SIGEV_NONE;

    errno = 0;

    /* Case one: invalid fds that match.  */
    if (aio_cancel (fd, &cb) != -1 || errno != EBADF)
      {
	puts ("aio_cancel( -1, {-1..} ) did not return -1 or errno != EBADF");
	result++;
      }

    cb.aio_fildes = -2;
    errno = 0;

    /* Case two: invalid fds that do not match; just print warning.  */
    if (aio_cancel (fd, &cb) != -1 || errno != EBADF)
      {
	puts ("aio_cancel( -1, {-2..} ) did not return -1 or errno != EBADF");
      }
  }

  /* Test for aio_fsync() detecting bad fd, and fd not open for writing.  */
  {
    struct aiocb cb;
    int fd = -1;

    cb.aio_fildes = fd;
    cb.aio_offset = 0;
    cb.aio_buf = NULL;
    cb.aio_nbytes = 0;
    cb.aio_reqprio = 0;
    cb.aio_sigevent.sigev_notify = SIGEV_NONE;

    errno = 0;

    /* Case one: invalid fd.  */
    if (aio_fsync (O_SYNC, &cb) != -1 || errno != EBADF)
      {
	puts ("aio_fsync( op, {-1..} ) did not return -1 or errno != EBADF");
	result++;
      }

    if ((fd = open ("/dev/null", O_RDONLY)) < 0)
      error (1, errno, "opening /dev/null");

    cb.aio_fildes = fd;
    errno = 0;

    /* Case two: valid fd but open for read only.  */
    if (aio_fsync (O_SYNC, &cb) != -1 || errno != EBADF)
      {
	puts ("aio_fsync( op, {RO..} ) did not return -1 or errno != EBADF");
	result++;
      }

    close (fd);
  }

  /* Test for aio_suspend() suspending even if completed elements in list.  */
  {
    const int BYTES = 8, ELEMS = 2;
    int i, r, fd;
    char buff[BYTES];
    char name[] = "/tmp/aio7.XXXXXX";
    struct timespec timeout;
    struct aiocb cb0, cb1;
    struct aiocb *list[ELEMS];

    if ((fd = mkstemp (name)) < 0)
      error (1, errno, "creating temp file");

    if (unlink (name))
      error (1, errno, "unlinking temp file");

    if (write( fd, "01234567", BYTES) != BYTES)
      error (1, errno, "writing to temp file");

    cb0.aio_fildes = fd;
    cb0.aio_offset = 0;
    cb0.aio_buf = buff;
    cb0.aio_nbytes = BYTES;
    cb0.aio_reqprio = 0;
    cb0.aio_sigevent.sigev_notify = SIGEV_NONE;

    if ((r = aio_read (&cb0)))
      error (1, errno, "reading from file");

    while (aio_error (&(cb0)) == EINPROGRESS)
      {
	usleep (10);
      }

    for (i = 0; i < BYTES; i++)
      {
	printf ("%c ", buff[i]);
      }
    printf ("\n");

    /* At this point, the first read is completed, so start another one on
     * stdin, which will not complete unless the user inputs something.
     */
    cb1.aio_fildes = 0;
    cb1.aio_offset = 0;
    cb1.aio_buf = buff;
    cb1.aio_nbytes = BYTES;
    cb1.aio_reqprio = 0;
    cb1.aio_sigevent.sigev_notify = SIGEV_NONE;

    if ((r = aio_read (&cb1)))
      error (1, errno, "reading from file");

    /* Now call aio_suspend() with the two reads.  It should return
     * immediately according to the POSIX spec.
     */
    list[0] = &cb0;
    list[1] = &cb1;
    timeout.tv_sec = 3;
    timeout.tv_nsec = 0;
    r = aio_suspend ((const struct aiocb * const *) list, ELEMS, &timeout);

    if (r == -1 && errno == EAGAIN)
      {
	puts ("aio_suspend([done,blocked],2,3) suspended thread");
	result++;
      }
  }

  return result;
}

#include "../test-skeleton.c"

---- End tst-aio7.c ----


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