githubmirror/strace

tests/splice.c

38 строк1 KB

Dmitry V. Levin

tests: assume __NR_splice is defined

02 июн 2021, 12:26

02 июн 2021, 12:260dec43a

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

#include "tests.h"
#include "scno.h"

#include <stdio.h>
#include <unistd.h>

int
main(void)
{
	const long int fd_in = (long int) 0xdeadbeefffffffffULL;
	const long int fd_out = (long int) 0xdeadbeeffffffffeULL;
	TAIL_ALLOC_OBJECT_CONST_PTR(long long int, off_in);
	TAIL_ALLOC_OBJECT_CONST_PTR(long long int, off_out);
	*off_in = 0xdeadbef1facefed1ULL;
	*off_out = 0xdeadbef2facefed2ULL;
	const size_t len = (size_t) 0xdeadbef3facefed3ULL;
	const unsigned int flags = 15;

	long rc = syscall(__NR_splice,
			  fd_in, off_in, fd_out, off_out, len, flags);
	printf("splice(%d, [%lld], %d, [%lld], %zu, %s) = %ld %s (%m)\n",
	       (int) fd_in, *off_in, (int) fd_out, *off_out, len,
	       "SPLICE_F_MOVE|SPLICE_F_NONBLOCK|SPLICE_F_MORE|SPLICE_F_GIFT",
	       rc, errno2name());

	puts("+++ exited with 0 +++");
	return 0;
}