// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * Copyright (c) International Business Machines Corp., 2001
 */

/*
 * Basic test for pipe().
 */

#include <errno.h>
#include <string.h>
#include "tst_test.h"

static int fds[2];

static void verify_pipe(void)
{
	int rd_size, wr_size;
	char wrbuf[] = "abcdefghijklmnopqrstuvwxyz";
	char rdbuf[128];

	memset(rdbuf, 0, sizeof(rdbuf));

	TEST(pipe(fds));

	if (TST_RET == -1) {
		tst_res(TFAIL | TTERRNO, "pipe()");
		return;
	}

	wr_size = SAFE_WRITE(1, fds[1], wrbuf, sizeof(wrbuf));
	rd_size = SAFE_READ(0, fds[0], rdbuf, sizeof(rdbuf));

	if (rd_size != wr_size) {
		tst_res(TFAIL, "read() returned %d, expected %d",
		        rd_size, wr_size);
		return;
	}

	if ((strncmp(rdbuf, wrbuf, wr_size)) != 0) {
		tst_res(TFAIL, "Wrong data were read back");
		return;
	}

	SAFE_CLOSE(fds[0]);
	SAFE_CLOSE(fds[1]);

	tst_res(TPASS, "pipe() functionality is correct");
}

static struct tst_test test = {
	.test_all = verify_pipe,
};