githubmirror/strace

tests/uio.c

43 строки874 B

Dmitry V. Levin

Update copyright headers

16 фев 2021, 11:00

16 фев 2021, 11:008fa8a88

/*
 * Copyright (c) 2014-2016 Dmitry V. Levin <ldv@strace.io>
 * Copyright (c) 2014-2021 The strace developers.
 * All rights reserved.
 *
 * SPDX-License-Identifier: GPL-2.0-or-later
 */

#include "tests.h"

#if defined(HAVE_PREADV) && defined(HAVE_PWRITEV)

# include <fcntl.h>
# include <unistd.h>
# include <sys/uio.h>
# include <assert.h>

int
main(void)
{
	const off_t offset = 0xdefaceddeadbeefLL;
	char buf[4];
	struct iovec iov = { buf, sizeof(buf) };

	(void) close(0);
	assert(open("/dev/zero", O_RDONLY) == 0);
	assert(pread(0, buf, sizeof(buf), offset) == 4);
	assert(preadv(0, &iov, 1, offset) == 4);
	assert(!close(0));

	assert(open("/dev/null", O_WRONLY) == 0);
	assert(pwrite(0, buf, sizeof(buf), offset) == 4);
	assert(pwritev(0, &iov, 1, offset) == 4);
	assert(!close(0));

	return 0;
}

#else

SKIP_MAIN_UNDEFINED("HAVE_PREADV && HAVE_PWRITEV")

#endif