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/* Test for AIO POSIX compliance.
Copyright (C) 2001-2025 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, see
<https://www.gnu.org/licenses/>. */
#include <aio.h>
#include <error.h>
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#define TEST_FUNCTION do_test ()
static int
do_test (void)
{
int result = 0;
int piped[2];
/* Make a pipe that we will never write to, so we can block reading it. */
if (pipe (piped) < 0)
{
perror ("pipe");
return 1;
}
/* 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)
{
if (errno == ENOSYS)
{
puts ("no aio support in this configuration");
return 0;
}
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. */
{
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;
}
}
/* Test for aio_suspend() suspending even if completed elements in list. */
{
#define BYTES 8
const int ELEMS = 2;
int i, r, fd;
static char buff[BYTES];
char name[] = "/tmp/aio7.XXXXXX";
struct timespec timeout;
static struct aiocb cb0, cb1;
struct aiocb *list[ELEMS];
fd = mkstemp (name);
if (fd < 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;
r = aio_read (&cb0);
if (r != 0)
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
the read half of a pipe on which nothing will be written. */
cb1.aio_fildes = piped[0];
cb1.aio_offset = 0;
cb1.aio_buf = buff;
cb1.aio_nbytes = BYTES;
cb1.aio_reqprio = 0;
cb1.aio_sigevent.sigev_notify = SIGEV_NONE;
r = aio_read (&cb1);
if (r != 0)
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;
}
/* Note that CB1 is still pending, and so cannot be an auto variable.
Thus we also test that exiting with an outstanding request works. */
}
return result;
}
#include "../test-skeleton.c"
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