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/* Smoke test for ioctl.
Copyright (C) 2021-2024 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 <support/check.h>
#include <support/xunistd.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
static int
do_test (void)
{
int pair[2];
TEST_COMPARE (socketpair (AF_UNIX, SOCK_STREAM, 0, pair), 0);
TEST_COMPARE (write (pair[0], "buffer", sizeof ("buffer")),
sizeof ("buffer"));
int value;
TEST_COMPARE (ioctl (pair[1], FIONREAD, &value), 0);
TEST_COMPARE (value, sizeof ("buffer"));
TEST_COMPARE (ioctl (pair[0], FIONREAD, &value), 0);
TEST_COMPARE (value, 0);
xclose (pair[0]);
xclose (pair[1]);
return 0;
}
#include <support/test-driver.c>
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