xref: /src/tests/lib/libc/sys/t_pollts.c

/*	$NetBSD: t_pollts.c,v 1.2 2023/08/01 23:41:54 gutteridge Exp $	*/

/*-
 * Copyright (c) 2011, 2020 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Matthias Scheler.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#include <sys/time.h>
#include <sys/wait.h>

#include <atf-c.h>
#include <errno.h>
#include <fcntl.h>
#include <paths.h>
#include <poll.h>
#include <stdio.h>
#include <signal.h>
#include <unistd.h>

#ifndef POLLTS
#define POLLTS pollts
#endif

ATF_TC(basic);
ATF_TC_HEAD(basic, tc)
{
	atf_tc_set_md_var(tc, "timeout", "10");
	atf_tc_set_md_var(tc, "descr",
	    "Basic functionality test for ppoll(2)/pollts(2)");
}

ATF_TC_BODY(basic, tc)
{
	int fds[2];
	struct pollfd pfds[2];
	struct timespec timeout;
	int ret;

	ATF_REQUIRE_EQ(pipe(fds), 0);

	pfds[0].fd = fds[0];
	pfds[0].events = POLLIN;
	pfds[1].fd = fds[1];
	pfds[1].events = POLLOUT;

	/* Use a timeout of 1 second. */
	timeout.tv_sec = 1;
	timeout.tv_nsec = 0;

	/*
	 * Check that we get a timeout waiting for data on the read end
	 * of our pipe.
	 */
	pfds[0].revents = -1;
	pfds[1].revents = -1;
	ATF_REQUIRE_EQ_MSG(ret = POLLTS(&pfds[0], 1, &timeout, NULL), 0,
	    "got: %d", ret);
	ATF_REQUIRE_EQ_MSG(pfds[0].revents, 0, "got: %d", pfds[0].revents);
	ATF_REQUIRE_EQ_MSG(pfds[1].revents, -1, "got: %d", pfds[1].revents);

	/* Check that the write end of the pipe as reported as ready. */
	pfds[0].revents = -1;
	pfds[1].revents = -1;
	ATF_REQUIRE_EQ_MSG(ret = POLLTS(&pfds[1], 1, &timeout, NULL), 1,
	    "got: %d", ret);
	ATF_REQUIRE_EQ_MSG(pfds[0].revents, -1, "got: %d", pfds[0].revents);
	ATF_REQUIRE_EQ_MSG(pfds[1].revents, POLLOUT, "got: %d",\
	    pfds[1].revents);

	/* Check that only the write end of the pipe as reported as ready. */
	pfds[0].revents = -1;
	pfds[1].revents = -1;
	ATF_REQUIRE_EQ_MSG(ret = POLLTS(pfds, 2, &timeout, NULL), 1,
	    "got: %d", ret);
	ATF_REQUIRE_EQ_MSG(pfds[0].revents, 0, "got: %d", pfds[0].revents);
	ATF_REQUIRE_EQ_MSG(pfds[1].revents, POLLOUT, "got: %d",
	    pfds[1].revents);

	/* Write data to our pipe. */
	ATF_REQUIRE_EQ(write(fds[1], "", 1), 1);

	/* Check that both ends of our pipe are reported as ready. */
	pfds[0].revents = -1;
	pfds[1].revents = -1;
	ATF_REQUIRE_EQ_MSG(ret = POLLTS(pfds, 2, &timeout, NULL), 2,
	    "got: %d", ret);
	ATF_REQUIRE_EQ_MSG(pfds[0].revents, POLLIN, "got: %d",
	    pfds[0].revents);
	ATF_REQUIRE_EQ_MSG(pfds[1].revents, POLLOUT, "got: %d",
	    pfds[1].revents);

	ATF_REQUIRE_EQ(close(fds[0]), 0);
	ATF_REQUIRE_EQ(close(fds[1]), 0);
}

ATF_TC(err);
ATF_TC_HEAD(err, tc)
{
	atf_tc_set_md_var(tc, "descr", "Check errors from ppoll(2)/pollts(2)");
}

ATF_TC_BODY(err, tc)
{
	struct timespec timeout;
	struct pollfd pfd;
	int fd = 0;

	pfd.fd = fd;
	pfd.events = POLLIN;

	timeout.tv_sec = 1;
	timeout.tv_nsec = 0;

	errno = 0;
	ATF_REQUIRE_ERRNO(EFAULT, POLLTS((void *)-1, 1, &timeout, NULL) == -1);

	timeout.tv_sec = -1;
	timeout.tv_nsec = -1;

	errno = 0;
	ATF_REQUIRE_ERRNO(EINVAL, POLLTS(&pfd, 1, &timeout, NULL) == -1);
}

ATF_TC(sigmask);
ATF_TC_HEAD(sigmask, tc)
{
	atf_tc_set_md_var(tc, "timeout", "10");
	atf_tc_set_md_var(tc, "descr",
	    "Check that ppoll(2)/pollts(2) restores the signal mask (PR kern/44986)");
}

ATF_TC_BODY(sigmask, tc)
{
	int fd;
	struct pollfd pfd;
	struct timespec timeout;
	sigset_t mask;
	int ret;

	fd = open(_PATH_DEVNULL, O_RDONLY);
	ATF_REQUIRE(fd >= 0);

	pfd.fd = fd;
	pfd.events = POLLIN;

	/* Use a timeout of 1 second. */
	timeout.tv_sec = 1;
	timeout.tv_nsec = 0;

	/* Unblock all signals. */
	ATF_REQUIRE_EQ(sigfillset(&mask), 0);
	ATF_REQUIRE_EQ(sigprocmask(SIG_UNBLOCK, &mask, NULL), 0);

	/*
	 * Check that ppoll(2)/pollts(2) immediately returns. We block *all*
	 * signals during ppoll(2)/pollts(2).
	 */
	ATF_REQUIRE_EQ_MSG(ret = POLLTS(&pfd, 1, &timeout, &mask), 1,
	    "got: %d", ret);

	/* Check that signals are now longer blocked. */
	ATF_REQUIRE_EQ(sigprocmask(SIG_SETMASK, NULL, &mask), 0);
	ATF_REQUIRE_EQ_MSG(sigismember(&mask, SIGUSR1), 0,
	    "signal mask was changed.");

	ATF_REQUIRE_EQ(close(fd), 0);
}

ATF_TP_ADD_TCS(tp)
{

	ATF_TP_ADD_TC(tp, basic);
	ATF_TP_ADD_TC(tp, err);
	ATF_TP_ADD_TC(tp, sigmask);

	return atf_no_error();
}