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glibc/rt/tst-aio7.c
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/* Test for AIO POSIX compliance. | |
Copyright (C) 2001-2016 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 | |
<http://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> | |
/* 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; | |
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" |