/*      $NetBSD: t_poll.c,v 1.12 2025/02/10 02:41:34 riastradh Exp $    */

/*-
 * Copyright (c) 2011 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/ioctl.h>
#include <sys/socket.h>
#include <sys/stat.h>
#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 <pthread.h>
#include <stdio.h>
#include <stdlib.h>
#include <signal.h>
#include <termios.h>
#include <unistd.h>

#include "h_macros.h"

static int desc;

static void
child1(void)
{
        struct pollfd pfd;

        pfd.fd = desc;
        pfd.events = POLLIN | POLLHUP | POLLOUT;

        (void)poll(&pfd, 1, 2000);
        (void)printf("child1 exit\n");
}

static void
child2(void)
{
        struct pollfd pfd;

        pfd.fd = desc;
        pfd.events = POLLIN | POLLHUP | POLLOUT;

        (void)sleep(1);
        (void)poll(&pfd, 1, INFTIM);
        (void)printf("child2 exit\n");
}

static void
child3(void)
{
        struct pollfd pfd;

        (void)sleep(5);

        pfd.fd = desc;
        pfd.events = POLLIN | POLLHUP | POLLOUT;

        (void)poll(&pfd, 1, INFTIM);
        (void)printf("child3 exit\n");
}

ATF_TC(3way);
ATF_TC_HEAD(3way, tc)
{
        atf_tc_set_md_var(tc, "timeout", "15");
        atf_tc_set_md_var(tc, "descr",
            "Check for 3-way collision for descriptor. First child comes "
            "and polls on descriptor, second child comes and polls, first "
            "child times out and exits, third child comes and polls. When "
            "the wakeup event happens, the two remaining children should "
            "both be awaken. (kern/17517)");
}

ATF_TC_BODY(3way, tc)
{
        int pf[2];
        int status, i;
        pid_t pid;
        ssize_t nwrit;

        RL(pipe(pf));
        desc = pf[0];

        RL(pid = fork());
        if (pid == 0) {
                if (close(pf[1]) == -1)
                        _exit(1);
                child1();
                _exit(0);
                /* NOTREACHED */
        }

        RL(pid = fork());
        if (pid == 0) {
                if (close(pf[1]) == -1)
                        _exit(1);
                child2();
                _exit(0);
                /* NOTREACHED */
        }

        RL(pid = fork());
        if (pid == 0) {
                if (close(pf[1]) == -1)
                        _exit(1);
                child3();
                _exit(0);
                /* NOTREACHED */
        }

        (void)sleep(10);

        (void)printf("parent write\n");

        RL(nwrit = write(pf[1], "konec\n", 6));
        ATF_REQUIRE_EQ_MSG(nwrit, 6, "nwrit=%zd", nwrit);

        for (i = 0; i < 3; i++)
                RL(wait(&status));

        (void)printf("parent terminated\n");
}

ATF_TC(basic);
ATF_TC_HEAD(basic, tc)
{
        atf_tc_set_md_var(tc, "timeout", "10");
        atf_tc_set_md_var(tc, "descr",
            "Basis functionality test for poll(2)");
}

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

        RL(pipe(fds));

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

        /*
         * Check that we get a timeout waiting for data on the read end
         * of our pipe.
         */
        pfds[0].revents = -1;
        pfds[1].revents = -1;
        RL(ret = poll(&pfds[0], 1, 1));
        ATF_REQUIRE_EQ_MSG(ret, 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;
        RL(ret = poll(&pfds[1], 1, 1));
        ATF_REQUIRE_EQ_MSG(ret, 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;
        RL(ret = poll(pfds, 2, 1));
        ATF_REQUIRE_EQ_MSG(ret, 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. */
        RL(nwrit = write(fds[1], "", 1));
        ATF_REQUIRE_EQ_MSG(nwrit, 1, "nwrit=%zd", nwrit);

        /* Check that both ends of our pipe are reported as ready. */
        pfds[0].revents = -1;
        pfds[1].revents = -1;
        RL(ret = poll(pfds, 2, 1));
        ATF_REQUIRE_EQ_MSG(ret, 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);

        RL(close(fds[0]));
        RL(close(fds[1]));
}

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

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

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

        errno = 0;
        ATF_REQUIRE_ERRNO(EFAULT, poll((struct pollfd *)-1, 1, -1) == -1);

        errno = 0;
        ATF_REQUIRE_ERRNO(EINVAL, poll(&pfd, 1, -2) == -1);
}

static const char       fifo_path[] = "pollhup_fifo";

static void
fifo_support(void)
{

        errno = 0;
        if (mkfifo(fifo_path, 0600) == 0) {
                RL(unlink(fifo_path));
                return;
        }

        if (errno == EOPNOTSUPP) {
                atf_tc_skip("the kernel does not support FIFOs");
        } else {
                atf_tc_fail("mkfifo(2) failed");
        }
}

ATF_TC_WITH_CLEANUP(fifo_inout);
ATF_TC_HEAD(fifo_inout, tc)
{
        atf_tc_set_md_var(tc, "descr",
            "Check POLLIN/POLLOUT behavior with fifos");
}

ATF_TC_BODY(fifo_inout, tc)
{
        struct pollfd pfd[2];
        char *buf;
        int rfd, wfd;
        long pipe_buf;
        int ret;
        ssize_t nwrit, nread;

        fifo_support();

        RL(mkfifo(fifo_path, 0600));
        RL(rfd = open(fifo_path, O_RDONLY | O_NONBLOCK));
        RL(wfd = open(fifo_path, O_WRONLY | O_NONBLOCK));

        /* Get the maximum atomic pipe write size. */
        pipe_buf = fpathconf(wfd, _PC_PIPE_BUF);
        ATF_REQUIRE_MSG(pipe_buf > 1, "pipe_buf=%ld", pipe_buf);

        REQUIRE_LIBC(buf = malloc(pipe_buf), NULL);

        memset(&pfd, 0, sizeof(pfd));
        pfd[0].fd = rfd;
        pfd[0].events = POLLIN | POLLRDNORM;
        pfd[1].fd = wfd;
        pfd[1].events = POLLOUT | POLLWRNORM;

        /* We expect the FIFO to be writable but not readable. */
        RL(ret = poll(pfd, 2, 0));
        ATF_REQUIRE_EQ_MSG(ret, 1, "got: %d", ret);
        ATF_REQUIRE_EQ_MSG(pfd[0].revents, 0,
            "pfd[0].revents=0x%x", pfd[0].revents);
        ATF_REQUIRE_EQ_MSG(pfd[1].revents, POLLOUT|POLLWRNORM,
            "pfd[1].revents=0x%x", pfd[1].revents);

        /* Write a single byte of data into the FIFO. */
        RL(nwrit = write(wfd, buf, 1));
        ATF_REQUIRE_EQ_MSG(nwrit, 1, "nwrit=%zd", nwrit);

        /* We expect the FIFO to be readable and writable. */
        RL(ret = poll(pfd, 2, 0));
        ATF_REQUIRE_EQ_MSG(ret, 2, "got: %d", ret);
        ATF_REQUIRE_EQ_MSG(pfd[0].revents, POLLIN|POLLRDNORM,
            "pfd[0].revents=0x%x", pfd[0].revents);
        ATF_REQUIRE_EQ_MSG(pfd[1].revents, POLLOUT|POLLWRNORM,
            "pfd[1].revents=0x%x", pfd[1].revents);

        /* Read that single byte back out. */
        RL(nread = read(rfd, buf, 1));
        ATF_REQUIRE_EQ_MSG(nread, 1, "nread=%zd", nread);

        /*
         * Write data into the FIFO until it is full, which is
         * defined as insufficient buffer space to hold a the
         * maximum atomic pipe write size.
         */
        while (write(wfd, buf, pipe_buf) != -1) {
                continue;
        }
        ATF_REQUIRE_EQ_MSG(errno, EAGAIN, "errno=%d", errno);

        /* We expect the FIFO to be readble but not writable. */
        RL(ret = poll(pfd, 2, 0));
        ATF_REQUIRE_EQ_MSG(ret, 1, "got: %d", ret);
        ATF_REQUIRE_EQ_MSG(pfd[0].revents, POLLIN|POLLRDNORM,
            "pfd[0].revents=0x%x", pfd[0].revents);
        ATF_REQUIRE_EQ_MSG(pfd[1].revents, 0,
            "pfd[1].revents=0x%x", pfd[1].revents);

        /* Read a single byte of data from the FIFO. */
        RL(nread = read(rfd, buf, 1));
        ATF_REQUIRE_EQ_MSG(nread, 1, "nread=%zd", nread);

        /*
         * Because we have read only a single byte out, there will
         * be insufficient space for a pipe_buf-sized message, so
         * the FIFO should still not be writable.
         */
        RL(ret = poll(pfd, 2, 0));
        ATF_REQUIRE_EQ_MSG(ret, 1, "got: %d", ret);
        ATF_REQUIRE_EQ_MSG(pfd[0].revents, POLLIN|POLLRDNORM,
            "pfd[0].revents=0x%x", pfd[0].revents);
        ATF_REQUIRE_EQ_MSG(pfd[1].revents, 0,
            "pfd[1].revents=0x%x", pfd[1].revents);

        /*
         * Now read enough so that exactly pipe_buf space should
         * be available.  The FIFO should be writable after that.
         * N.B. we don't care if it's readable at this point.
         */
        RL(nread = read(rfd, buf, pipe_buf - 1));
        ATF_REQUIRE_EQ_MSG(nread, pipe_buf - 1, "nread=%zd pipe_buf-1=%ld",
            nread, pipe_buf - 1);
        RL(ret = poll(pfd, 2, 0));
        ATF_REQUIRE_MSG(ret >= 1, "got: %d", ret);
        ATF_REQUIRE_EQ_MSG(pfd[1].revents, POLLOUT|POLLWRNORM,
            "pfd[1].revents=0x%x", pfd[1].revents);

        /*
         * Now read all of the data out of the FIFO and ensure that
         * we get back to the initial state.
         */
        while (read(rfd, buf, pipe_buf) != -1) {
                continue;
        }
        ATF_REQUIRE_EQ_MSG(errno, EAGAIN, "errno=%d", errno);

        RL(ret = poll(pfd, 2, 0));
        ATF_REQUIRE_EQ_MSG(ret, 1, "got: %d", ret);
        ATF_REQUIRE_EQ_MSG(pfd[0].revents, 0,
            "pfd[0].revents=0x%x", pfd[0].revents);
        ATF_REQUIRE_EQ_MSG(pfd[1].revents, POLLOUT|POLLWRNORM,
            "pfd[1].revents=0x%x", pfd[1].revents);

        RL(close(wfd));
        RL(close(rfd));
}

ATF_TC_CLEANUP(fifo_inout, tc)
{
        (void)unlink(fifo_path);
}

ATF_TC_WITH_CLEANUP(fifo_hup1);
ATF_TC_HEAD(fifo_hup1, tc)
{
        atf_tc_set_md_var(tc, "descr",
            "Check POLLHUP behavior with fifos [1]");
}

ATF_TC_BODY(fifo_hup1, tc)
{
        struct pollfd pfd;
        int rfd, wfd;
        int ret;

        fifo_support();

        RL(mkfifo(fifo_path, 0600));
        RL(rfd = open(fifo_path, O_RDONLY | O_NONBLOCK));
        RL(wfd = open(fifo_path, O_WRONLY));

        memset(&pfd, 0, sizeof(pfd));
        pfd.fd = rfd;
        pfd.events = POLLIN;

        RL(close(wfd));

        RL(ret = poll(&pfd, 1, 0));
        ATF_REQUIRE_EQ_MSG(ret, 1, "got: %d", ret);
        ATF_REQUIRE_EQ_MSG((pfd.revents & (POLLHUP|POLLOUT)), POLLHUP,
            "revents=0x%x expected POLLHUP=0x%x but not POLLOUT=0x%x",
            pfd.revents, POLLHUP, POLLOUT);

        /*
         * Check that POLLHUP is cleared when a writer re-connects.
         * Since the writer will not put any data into the FIFO, we
         * expect no events.
         */
        memset(&pfd, 0, sizeof(pfd));
        pfd.fd = rfd;
        pfd.events = POLLIN;

        RL(wfd = open(fifo_path, O_WRONLY));
        RL(ret = poll(&pfd, 1, 0));
        ATF_REQUIRE_EQ_MSG(ret, 0, "got: %d", ret);
}

ATF_TC_CLEANUP(fifo_hup1, tc)
{
        (void)unlink(fifo_path);
}

ATF_TC_WITH_CLEANUP(fifo_hup2);
ATF_TC_HEAD(fifo_hup2, tc)
{
        atf_tc_set_md_var(tc, "descr",
            "Check POLLHUP behavior with fifos [2]");
}

ATF_TC_BODY(fifo_hup2, tc)
{
        struct pollfd pfd;
        int rfd, wfd;
        pid_t pid;
        struct timespec ts1, ts2;
        int ret;

        fifo_support();

        RL(mkfifo(fifo_path, 0600));
        RL(rfd = open(fifo_path, O_RDONLY | O_NONBLOCK));
        RL(wfd = open(fifo_path, O_WRONLY));

        memset(&pfd, 0, sizeof(pfd));
        pfd.fd = rfd;
        pfd.events = POLLIN;

        RL(pid = fork());
        if (pid == 0) {
                if (close(rfd))
                        _exit(1);
                sleep(5);
                if (close(wfd))
                        _exit(1);
                _exit(0);
        }
        RL(close(wfd));

        RL(clock_gettime(CLOCK_MONOTONIC, &ts1));
        RL(ret = poll(&pfd, 1, INFTIM));
        ATF_REQUIRE_EQ_MSG(ret, 1, "got: %d", ret);
        RL(clock_gettime(CLOCK_MONOTONIC, &ts2));

        /* Make sure at least a couple of seconds have elapsed. */
        ATF_REQUIRE_MSG(ts2.tv_sec - ts1.tv_sec >= 2,
            "ts1=%lld.%09ld ts2=%lld.%09ld",
            (long long)ts1.tv_sec, ts1.tv_nsec,
            (long long)ts2.tv_sec, ts2.tv_nsec);

        ATF_REQUIRE_EQ_MSG((pfd.revents & (POLLHUP|POLLOUT)), POLLHUP,
            "revents=0x%x expected POLLHUP=0x%x but not POLLOUT=0x%x",
            pfd.revents, POLLHUP, POLLOUT);
}

ATF_TC_CLEANUP(fifo_hup2, tc)
{
        (void)unlink(fifo_path);
}

static void
fillpipebuf(int writefd)
{
        char buf[BUFSIZ] = {0};
        size_t n = 0;
        ssize_t nwrit;
        int flags;

        RL(flags = fcntl(writefd, F_GETFL));
        RL(fcntl(writefd, F_SETFL, flags|O_NONBLOCK));
        while ((nwrit = write(writefd, buf, sizeof(buf))) != -1)
                n += (size_t)nwrit;
        ATF_CHECK_EQ_MSG(errno, EAGAIN, "errno=%d", errno);
        RL(fcntl(writefd, F_SETFL, flags));
        fprintf(stderr, "filled %d with %zu bytes\n", writefd, n);
}

static void
check_write_fail(int writefd, int error)
{
        int flags;
        void (*sighandler)(int);
        char c = 0;
        ssize_t nwrit;

        RL(flags = fcntl(writefd, F_GETFL));
        RL(fcntl(writefd, F_SETFL, flags|O_NONBLOCK));

        REQUIRE_LIBC(sighandler = signal(SIGPIPE, SIG_IGN), SIG_ERR);
        ATF_CHECK_ERRNO(error, (nwrit = write(writefd, &c, 1)) == -1);
        ATF_CHECK_EQ_MSG(nwrit, -1, "nwrit=%zd", nwrit);
        REQUIRE_LIBC(signal(SIGPIPE, sighandler), SIG_ERR);

        RL(fcntl(writefd, F_SETFL, flags));
}

static void
check_read_eof(int readfd)
{
        int flags;
        char c;
        ssize_t nread;

        RL(flags = fcntl(readfd, F_GETFL));
        RL(fcntl(readfd, F_SETFL, flags|O_NONBLOCK));

        RL(nread = read(readfd, &c, 1));
        ATF_CHECK_EQ_MSG(nread, 0, "nread=%zu", nread);

        RL(fcntl(readfd, F_SETFL, flags));
}

static void
check_pollclosed_delayed_write(int writefd, int readfd,
    int expected, int writeerror)
{
        struct pollfd pfd = { .fd = writefd, .events = POLLOUT };
        struct timespec start, end, delta;
        int nfds;

        /*
         * Don't let poll sleep for more than 3sec.  (The close delay
         * will be 2sec, and we make sure that we sleep at least 1sec.)
         */
        REQUIRE_LIBC(alarm(3), (unsigned)-1);

        /*
         * Wait in poll(2) indefinitely (subject to the alarm) and
         * measure how long we slept.
         */
        fprintf(stderr, "poll %d\n", writefd);
        RL(clock_gettime(CLOCK_MONOTONIC, &start));
        RL(nfds = poll(&pfd, 1, INFTIM));
        RL(clock_gettime(CLOCK_MONOTONIC, &end));
        fprintf(stderr, "poll %d done nfds=%d\n", writefd, nfds);

        REQUIRE_LIBC(alarm(0), (unsigned)-1);

        /*
         * The reader has been closed, so write will fail immediately
         * with EPIPE/SIGPIPE, and thus POLLOUT must be set.  POLLHUP
         * is only returned for reads, not for writes (and is mutually
         * exclusive with POLLOUT).  Except we _do_ return POLLHUP
         * instead of POLLOUT for terminals.
         */
        RL(nfds = poll(&pfd, 1, 0));
        ATF_CHECK_EQ_MSG(nfds, 1, "nfds=%d", nfds);
        ATF_CHECK_EQ_MSG(pfd.fd, writefd, "pfd.fd=%d writefd=%d",
            pfd.fd, writefd);
        ATF_CHECK_EQ_MSG((pfd.revents & (POLLHUP|POLLIN|POLLOUT)), expected,
            "revents=0x%x expected=0x%x"
            " POLLHUP=0x%x POLLIN=0x%x POLLOUT=0x%x",
            pfd.revents, expected, POLLOUT, POLLHUP, POLLIN);

        /*
         * We should have slept at least 1sec.
         */
        timespecsub(&end, &start, &delta);
        ATF_CHECK_MSG(delta.tv_sec >= 1,
            "slept only %lld.%09ld", (long long)delta.tv_sec, delta.tv_nsec);

        /*
         * Write should fail with EPIPE/SIGPIPE now, or EIO for
         * terminals -- and continue to do so.
         */
        check_write_fail(writefd, writeerror);
        check_write_fail(writefd, writeerror);
}

static void
check_pollclosed_delayed_write_fifopipesocket(int writefd, int readfd)
{

        check_pollclosed_delayed_write(writefd, readfd, POLLOUT, EPIPE);
}

static void
check_pollclosed_delayed_write_terminal(int writefd, int readfd)
{

        check_pollclosed_delayed_write(writefd, readfd, POLLHUP, EIO);
}

static void
check_pollclosed_delayed_read(int readfd, int writefd, int pollhup)
{
        struct pollfd pfd;
        struct timespec start, end, delta;
        int nfds;

        /*
         * Don't let poll sleep for more than 3sec.  (The close delay
         * will be 2sec, and we make sure that we sleep at least 1sec.)
         */
        REQUIRE_LIBC(alarm(3), (unsigned)-1);

        /*
         * Wait in poll(2) indefinitely (subject to the alarm) and
         * measure how long we slept.
         */
        pfd = (struct pollfd) { .fd = readfd, .events = POLLIN };
        fprintf(stderr, "poll %d\n", readfd);
        RL(clock_gettime(CLOCK_MONOTONIC, &start));
        RL(nfds = poll(&pfd, 1, INFTIM));
        RL(clock_gettime(CLOCK_MONOTONIC, &end));
        fprintf(stderr, "poll %d done nfds=%d\n", readfd, nfds);

        REQUIRE_LIBC(alarm(0), (unsigned)-1);

        /*
         * Read will yield EOF without blocking, so POLLIN should be
         * set, and the write side has been closed, so POLLHUP should
         * also be set, unsolicited, if this is a pipe or FIFO -- but
         * not if it's a socket, where POLLHUP is never set.  Since we
         * didn't ask for POLLOUT, it should be clear.
         */
        ATF_CHECK_EQ_MSG(nfds, 1, "nfds=%d", nfds);
        ATF_CHECK_EQ_MSG(pfd.fd, readfd, "pfd.fd=%d readfd=%d writefd=%d",
            pfd.fd, readfd, writefd);
        ATF_CHECK_EQ_MSG((pfd.revents & (POLLHUP|POLLIN|POLLOUT)),
            pollhup|POLLIN,
            "revents=0x%x expected=0x%x"
            " POLLHUP=0x%x POLLIN=0x%x POLLOUT=0x%x",
            pfd.revents, pollhup|POLLIN, POLLHUP, POLLIN, POLLOUT);

        /*
         * We should have slept at least 1sec.
         */
        timespecsub(&end, &start, &delta);
        ATF_CHECK_MSG(delta.tv_sec >= 1,
            "slept only %lld.%09ld", (long long)delta.tv_sec, delta.tv_nsec);

        /*
         * Read should return EOF now -- and continue to do so.
         */
        check_read_eof(readfd);
        check_read_eof(readfd);

        /*
         * POLLHUP|POLLIN state should be persistent (until the writer
         * side is reopened if possible, as in a named pipe).
         */
        pfd = (struct pollfd) { .fd = readfd, .events = POLLIN };
        RL(nfds = poll(&pfd, 1, 0));
        ATF_CHECK_EQ_MSG(nfds, 1, "nfds=%d", nfds);
        ATF_CHECK_EQ_MSG(pfd.fd, readfd, "pfd.fd=%d readfd=%d writefd=%d",
            pfd.fd, readfd, writefd);
        ATF_CHECK_EQ_MSG((pfd.revents & (POLLHUP|POLLIN|POLLOUT)),
            pollhup|POLLIN,
            "revents=0x%x expected=0x%x"
            " POLLHUP=0x%x POLLIN=0x%x POLLOUT=0x%x",
            pfd.revents, pollhup|POLLIN, POLLHUP, POLLIN, POLLOUT);
}

static void
check_pollclosed_delayed_read_devfifopipe(int readfd, int writefd)
{

        check_pollclosed_delayed_read(readfd, writefd, POLLHUP);
}

static void
check_pollclosed_delayed_read_socket(int readfd, int writefd)
{

        check_pollclosed_delayed_read(readfd, writefd, /*no POLLHUP*/0);
}

static void
check_pollclosed_delayed_process(int pollfd, int closefd,
    void (*check_pollhup)(int, int))
{
        pid_t pid;
        int status;

        /*
         * Fork a child to close closefd after a 2sec delay.
         */
        RL(pid = fork());
        if (pid == 0) {
                sleep(2);
                fprintf(stderr, "[child] close %d\n", closefd);
                if (close(closefd) == -1)
                        _exit(1);
                _exit(0);
        }

        /*
         * Close closefd in the parent so the child has the last
         * reference to it.
         */
        fprintf(stderr, "[parent] close %d\n", closefd);
        RL(close(closefd));

        /*
         * Test poll(2).
         */
        (*check_pollhup)(pollfd, closefd);

        /*
         * Wait for the child and make sure it exited successfully.
         */
        RL(waitpid(pid, &status, 0));
        ATF_CHECK_EQ_MSG(status, 0, "child exited with status 0x%x", status);
}

static void *
check_pollclosed_thread(void *cookie)
{
        int *closefdp = cookie;

        sleep(2);
        fprintf(stderr, "[thread] close %d\n", *closefdp);
        RL(close(*closefdp));
        return NULL;
}

static void
check_pollclosed_delayed_thread(int pollfd, int closefd,
    void (*check_pollhup)(int, int))
{
        pthread_t t;

        /*
         * Create a thread to close closefd (in this process, not a
         * child) after a 2sec delay.
         */
        RZ(pthread_create(&t, NULL, &check_pollclosed_thread, &closefd));

        /*
         * Test poll(2).
         */
        (*check_pollhup)(pollfd, closefd);

        /*
         * Wait for the thread to complete.
         */
        RZ(pthread_join(t, NULL));
}

static void
check_pollclosed_immediate_write(int writefd, int readfd, int expected,
    int writeerror)
{
        struct pollfd pfd = { .fd = writefd, .events = POLLOUT };
        int nfds;

        /*
         * Close the reader side immediately.
         */
        fprintf(stderr, "[immediate] close %d\n", readfd);
        RL(close(readfd));

        /*
         * The reader has been closed, so write will fail immediately
         * with EPIPE/SIGPIPE, and thus POLLOUT must be set.  POLLHUP
         * is only returned for reads, not for writes (and is mutually
         * exclusive with POLLOUT).  Except we _do_ return POLLHUP
         * instead of POLLOUT for terminals.
         */
        RL(nfds = poll(&pfd, 1, 0));
        ATF_CHECK_EQ_MSG(nfds, 1, "nfds=%d", nfds);
        ATF_CHECK_EQ_MSG(pfd.fd, writefd, "pfd.fd=%d writefd=%d",
            pfd.fd, writefd);
        ATF_CHECK_EQ_MSG((pfd.revents & (POLLHUP|POLLIN|POLLOUT)), expected,
            "revents=0x%x expected=0x%x"
            " POLLHUP=0x%x POLLIN=0x%x POLLOUT=0x%x",
            pfd.revents, expected, POLLOUT, POLLHUP, POLLIN);

        /*
         * Write should fail with EPIPE/SIGPIPE now -- and continue to
         * do so.
         */
        check_write_fail(writefd, writeerror);
        check_write_fail(writefd, writeerror);
}

static void
check_pollclosed_immediate_readnone(int readfd, int writefd, int pollhup)
{
        struct pollfd pfd = { .fd = readfd, .events = POLLIN };
        int nfds;

        /*
         * Close the writer side immediately.
         */
        fprintf(stderr, "[immediate] close %d\n", writefd);
        RL(close(writefd));

        /*
         * Read will yield EOF without blocking, so POLLIN should be
         * set, and the write side has been closed, so POLLHUP should
         * be set, unsolicited, if this is a pipe or FIFO -- but not if
         * it's a socket, where POLLHUP is never set.  Since we didn't
         * ask for POLLOUT, it should be clear.
         */
        RL(nfds = poll(&pfd, 1, 0));
        ATF_CHECK_EQ_MSG(nfds, 1, "nfds=%d", nfds);
        ATF_CHECK_EQ_MSG((pfd.revents & (POLLHUP|POLLIN|POLLOUT)),
            pollhup|POLLIN,
            "revents=0x%x expected=0x%x"
            " POLLHUP=0x%x POLLIN=0x%x POLLOUT=0x%x",
            pfd.revents, pollhup|POLLIN, POLLHUP, POLLIN, POLLOUT);

        /*
         * Read should return EOF now -- and continue to do so.
         */
        check_read_eof(readfd);
        check_read_eof(readfd);
}

static void
check_pollclosed_immediate_readsome(int readfd, int writefd, int pollhup)
{
        struct pollfd pfd;
        char buf[BUFSIZ];
        ssize_t nread;
        int nfds;

        /*
         * Close the writer side immediately.
         */
        fprintf(stderr, "[immediate] close %d\n", writefd);
        RL(close(writefd));

        /*
         * Some data should be ready to read, so POLLIN should be set,
         * and the write side has been closed, so POLLHUP should also
         * be set, unsolicited, if this is a pipe or FIFO -- but not if
         * it's a socket, where POLLHUP is never set.  Since we didn't
         * ask for POLLOUT, it should be clear.
         */
        pfd = (struct pollfd) { .fd = readfd, .events = POLLIN };
        RL(nfds = poll(&pfd, 1, 0));
        ATF_CHECK_EQ_MSG(nfds, 1, "nfds=%d", nfds);
        ATF_CHECK_EQ_MSG((pfd.revents & (POLLHUP|POLLIN|POLLOUT)),
            pollhup|POLLIN,
            "revents=0x%x expected=0x%x"
            " POLLHUP=0x%x POLLIN=0x%x POLLOUT=0x%x",
            pfd.revents, pollhup|POLLIN, POLLHUP, POLLIN, POLLOUT);

        /*
         * Read all the data.  Each read should complete instantly --
         * no blocking, either because there's data to read or because
         * the writer has hung up and we get EOF.
         */
        do {
                REQUIRE_LIBC(alarm(1), (unsigned)-1);
                RL(nread = read(readfd, buf, sizeof(buf)));
                REQUIRE_LIBC(alarm(0), (unsigned)-1);
        } while (nread != 0);

        /*
         * Read will yield EOF without blocking, so POLLIN should be
         * set, and the write side has been closed, so POLLHUP should
         * also be set, unsolicited, if this is a pipe or FIFO -- but
         * not if it's a socket, where POLLHUP is never set.  Since we
         * didn't ask for POLLOUT, it should be clear.
         */
        pfd = (struct pollfd) { .fd = readfd, .events = POLLIN };
        RL(nfds = poll(&pfd, 1, 0));
        ATF_CHECK_EQ_MSG(nfds, 1, "nfds=%d", nfds);
        ATF_CHECK_EQ_MSG((pfd.revents & (POLLHUP|POLLIN|POLLOUT)),
            pollhup|POLLIN,
            "revents=0x%x expected=0x%x"
            " POLLHUP=0x%x POLLIN=0x%x POLLOUT=0x%x",
            pfd.revents, pollhup|POLLIN, POLLHUP, POLLIN, POLLOUT);

        /*
         * Read should return EOF now -- and continue to do so.
         */
        check_read_eof(readfd);
        check_read_eof(readfd);

        /*
         * POLLHUP|POLLIN state should be persistent (until the writer
         * side is reopened if possible, as in a named pipe).
         */
        pfd = (struct pollfd) { .fd = readfd, .events = POLLIN };
        RL(nfds = poll(&pfd, 1, 0));
        ATF_CHECK_EQ_MSG(nfds, 1, "nfds=%d", nfds);
        ATF_CHECK_EQ_MSG((pfd.revents & (POLLHUP|POLLIN|POLLOUT)),
            pollhup|POLLIN,
            "revents=0x%x expected=0x%x"
            " POLLHUP=0x%x POLLIN=0x%x POLLOUT=0x%x",
            pfd.revents, pollhup|POLLIN, POLLHUP, POLLIN, POLLOUT);
}

static void *
pollclosed_fifo_writer_thread(void *cookie)
{
        int *pp = cookie;

        RL(*pp = open(fifo_path, O_WRONLY));
        return NULL;
}

static void *
pollclosed_fifo_reader_thread(void *cookie)
{
        int *pp = cookie;

        RL(*pp = open(fifo_path, O_RDONLY));
        return NULL;
}

static void
pollclosed_fifo0_setup(int *writefdp, int *readfdp)
{
        int p0, p1;
        pthread_t t;

        fifo_support();

        RL(mkfifo(fifo_path, 0600));
        RZ(pthread_create(&t, NULL, &pollclosed_fifo_reader_thread, &p0));
        REQUIRE_LIBC(alarm(1), (unsigned)-1);
        RL(p1 = open(fifo_path, O_WRONLY));
        REQUIRE_LIBC(alarm(0), (unsigned)-1);
        RZ(pthread_join(t, NULL));

        *writefdp = p1;
        *readfdp = p0;
}

static void
pollclosed_fifo1_setup(int *writefdp, int *readfdp)
{
        int p0, p1;
        pthread_t t;

        fifo_support();

        RL(mkfifo(fifo_path, 0600));
        RZ(pthread_create(&t, NULL, &pollclosed_fifo_writer_thread, &p0));
        REQUIRE_LIBC(alarm(1), (unsigned)-1);
        RL(p1 = open(fifo_path, O_RDONLY));
        REQUIRE_LIBC(alarm(0), (unsigned)-1);
        RZ(pthread_join(t, NULL));

        *writefdp = p0;
        *readfdp = p1;
}

static void
pollclosed_pipe_setup(int *writefdp, int *readfdp)
{
        int p[2];

        RL(pipe(p));

        *readfdp = p[0];        /* reader side */
        *writefdp = p[1];       /* writer side */
}

static void
pollclosed_ptyapp_setup(int *writefdp, int *readfdp)
{
        int hostfd, appfd;
        struct termios t;
        char *pts;

        RL(hostfd = posix_openpt(O_RDWR|O_NOCTTY));
        RL(grantpt(hostfd));
        RL(unlockpt(hostfd));
        REQUIRE_LIBC(pts = ptsname(hostfd), NULL);
        RL(appfd = open(pts, O_RDWR|O_NOCTTY));

        RL(tcgetattr(appfd, &t));
        t.c_lflag &= ~ICANON;   /* block rather than drop input */
        RL(tcsetattr(appfd, TCSANOW, &t));

        *readfdp = appfd;
        *writefdp = hostfd;
}

static void
pollclosed_ptyhost_setup(int *writefdp, int *readfdp)
{
        int hostfd, appfd;
        struct termios t;
        char *pts;

        RL(hostfd = posix_openpt(O_RDWR|O_NOCTTY));
        RL(grantpt(hostfd));
        RL(unlockpt(hostfd));
        REQUIRE_LIBC(pts = ptsname(hostfd), NULL);
        RL(appfd = open(pts, O_RDWR|O_NOCTTY));

        RL(tcgetattr(appfd, &t));
        t.c_lflag &= ~ICANON;   /* block rather than drop input */
        RL(tcsetattr(appfd, TCSANOW, &t));

        *writefdp = appfd;
        *readfdp = hostfd;
}

static void
pollclosed_socketpair0_setup(int *writefdp, int *readfdp)
{
        int s[2];

        RL(socketpair(AF_LOCAL, SOCK_STREAM, 0, s));
        *readfdp = s[0];
        *writefdp = s[1];
}

static void
pollclosed_socketpair1_setup(int *writefdp, int *readfdp)
{
        int s[2];

        RL(socketpair(AF_LOCAL, SOCK_STREAM, 0, s));
        *readfdp = s[1];
        *writefdp = s[0];
}

/*
 * Cartesian product of:
 *
 * 1. [fifo0] first fifo opener
 * 2. [fifo1] second fifo opener
 * 3. [pipe] pipe
 * 4. [ptyhost] host side of pty
 * 5. [ptyapp] application side of pty
 * 6. [socketpair0] first side of socket pair
 * 7. [socketpair1] second side of socket pair
 *
 * with
 *
 * 1. [immediate] closed before poll starts
 * 2. [delayed_thread] closed by another thread after poll starts
 * 3. [delayed_process] closed by another process after poll starts
 *
 * with
 *
 * 1. [writefull] close reader, poll for write when buffer full
 * 2. [writeempty] close reader, poll for write when buffer empty
 * 3. [readnone] close writer, poll for read when nothing to read
 * 4. [readsome] close writer, poll for read when something to read
 *
 * except that in the delayed cases we only do writefull [write] and
 * readnone [read], because there's no delay in the writeempty/readsome
 * cases.
 */

ATF_TC(pollclosed_fifo0_immediate_writefull);
ATF_TC_HEAD(pollclosed_fifo0_immediate_writefull, tc)
{
        atf_tc_set_md_var(tc, "descr",
            "Checks POLLHUP with closing the first opener of a named pipe");
}
ATF_TC_BODY(pollclosed_fifo0_immediate_writefull, tc)
{
        int writefd, readfd;

        pollclosed_fifo0_setup(&writefd, &readfd);
        fillpipebuf(writefd);
        check_pollclosed_immediate_write(writefd, readfd, POLLOUT, EPIPE);
}

ATF_TC(pollclosed_fifo0_immediate_writeempty);
ATF_TC_HEAD(pollclosed_fifo0_immediate_writeempty, tc)
{
        atf_tc_set_md_var(tc, "descr",
            "Checks POLLHUP with closing the first opener of a named pipe");
}
ATF_TC_BODY(pollclosed_fifo0_immediate_writeempty, tc)
{
        int writefd, readfd;

        pollclosed_fifo0_setup(&writefd, &readfd);
        /* don't fill the pipe buf */
        check_pollclosed_immediate_write(writefd, readfd, POLLOUT, EPIPE);
}

ATF_TC(pollclosed_fifo0_immediate_readsome);
ATF_TC_HEAD(pollclosed_fifo0_immediate_readsome, tc)
{
        atf_tc_set_md_var(tc, "descr",
            "Checks POLLHUP with closing the first opener of a named pipe");
}
ATF_TC_BODY(pollclosed_fifo0_immediate_readsome, tc)
{
        int writefd, readfd;

        /*
         * poll(2) returns nothing, when it is supposed to return
         * POLLHUP|POLLIN.
         */
        atf_tc_expect_fail("PR kern/59056: poll POLLHUP bugs");

        pollclosed_fifo1_setup(&writefd, &readfd); /* reverse r/w */
        fillpipebuf(writefd);
        check_pollclosed_immediate_readsome(readfd, writefd, POLLHUP);
}

ATF_TC(pollclosed_fifo0_immediate_readnone);
ATF_TC_HEAD(pollclosed_fifo0_immediate_readnone, tc)
{
        atf_tc_set_md_var(tc, "descr",
            "Checks POLLHUP with closing the first opener of a named pipe");
}
ATF_TC_BODY(pollclosed_fifo0_immediate_readnone, tc)
{
        int writefd, readfd;

        pollclosed_fifo1_setup(&writefd, &readfd); /* reverse r/w */
        /* don't fill the pipe buf */
        check_pollclosed_immediate_readnone(readfd, writefd, POLLHUP);
}

ATF_TC(pollclosed_fifo0_delayed_process_write);
ATF_TC_HEAD(pollclosed_fifo0_delayed_process_write, tc)
{
        atf_tc_set_md_var(tc, "descr",
            "Checks POLLHUP with closing the first opener of a named pipe");
}
ATF_TC_BODY(pollclosed_fifo0_delayed_process_write, tc)
{
        int writefd, readfd;

        pollclosed_fifo0_setup(&writefd, &readfd);
        fillpipebuf(writefd);
        check_pollclosed_delayed_process(writefd, readfd,
            &check_pollclosed_delayed_write_fifopipesocket);
}

ATF_TC(pollclosed_fifo0_delayed_process_read);
ATF_TC_HEAD(pollclosed_fifo0_delayed_process_read, tc)
{
        atf_tc_set_md_var(tc, "descr",
            "Checks POLLHUP with closing the first opener of a named pipe");
}
ATF_TC_BODY(pollclosed_fifo0_delayed_process_read, tc)
{
        int writefd, readfd;

        /*
         * poll(2) wakes up with POLLHUP|POLLIN, but the state isn't
         * persistent as it is supposed to be -- it returns nothing
         * after that.
         */
        atf_tc_expect_fail("PR kern/59056: poll POLLHUP bugs");

        pollclosed_fifo1_setup(&writefd, &readfd); /* reverse r/w */
        /* don't fill pipe buf */
        check_pollclosed_delayed_process(readfd, writefd,
            &check_pollclosed_delayed_read_devfifopipe);
}

ATF_TC(pollclosed_fifo0_delayed_thread_write);
ATF_TC_HEAD(pollclosed_fifo0_delayed_thread_write, tc)
{
        atf_tc_set_md_var(tc, "descr",
            "Checks POLLHUP with closing the first opener of a named pipe");
}
ATF_TC_BODY(pollclosed_fifo0_delayed_thread_write, tc)
{
        int writefd, readfd;

        pollclosed_fifo0_setup(&writefd, &readfd);
        fillpipebuf(writefd);
        check_pollclosed_delayed_thread(writefd, readfd,
            &check_pollclosed_delayed_write_fifopipesocket);
}

ATF_TC(pollclosed_fifo0_delayed_thread_read);
ATF_TC_HEAD(pollclosed_fifo0_delayed_thread_read, tc)
{
        atf_tc_set_md_var(tc, "descr",
            "Checks POLLHUP with closing the first opener of a named pipe");
}
ATF_TC_BODY(pollclosed_fifo0_delayed_thread_read, tc)
{
        int writefd, readfd;

        /*
         * poll(2) wakes up with POLLHUP|POLLIN, but the state isn't
         * persistent as it is supposed to be -- it returns nothing
         * after that.
         */
        atf_tc_expect_fail("PR kern/59056: poll POLLHUP bugs");

        pollclosed_fifo1_setup(&writefd, &readfd); /* reverse r/w */
        /* don't fill pipe buf */
        check_pollclosed_delayed_thread(readfd, writefd,
            &check_pollclosed_delayed_read_devfifopipe);
}

ATF_TC(pollclosed_fifo1_immediate_writefull);
ATF_TC_HEAD(pollclosed_fifo1_immediate_writefull, tc)
{
        atf_tc_set_md_var(tc, "descr",
            "Checks POLLHUP with closing the second opener of a named pipe");
}
ATF_TC_BODY(pollclosed_fifo1_immediate_writefull, tc)
{
        int writefd, readfd;

        pollclosed_fifo1_setup(&writefd, &readfd);
        fillpipebuf(writefd);
        check_pollclosed_immediate_write(writefd, readfd, POLLOUT, EPIPE);
}

ATF_TC(pollclosed_fifo1_immediate_writeempty);
ATF_TC_HEAD(pollclosed_fifo1_immediate_writeempty, tc)
{
        atf_tc_set_md_var(tc, "descr",
            "Checks POLLHUP with closing the second opener of a named pipe");
}
ATF_TC_BODY(pollclosed_fifo1_immediate_writeempty, tc)
{
        int writefd, readfd;

        pollclosed_fifo1_setup(&writefd, &readfd);
        /* don't fill the pipe buf */
        check_pollclosed_immediate_write(writefd, readfd, POLLOUT, EPIPE);
}

ATF_TC(pollclosed_fifo1_immediate_readsome);
ATF_TC_HEAD(pollclosed_fifo1_immediate_readsome, tc)
{
        atf_tc_set_md_var(tc, "descr",
            "Checks POLLHUP with closing the second opener of a named pipe");
}
ATF_TC_BODY(pollclosed_fifo1_immediate_readsome, tc)
{
        int writefd, readfd;

        /*
         * poll(2) returns nothing, when it is supposed to return
         * POLLHUP|POLLIN.
         */
        atf_tc_expect_fail("PR kern/59056: poll POLLHUP bugs");

        pollclosed_fifo0_setup(&writefd, &readfd); /* reverse r/w */
        fillpipebuf(writefd);
        check_pollclosed_immediate_readsome(readfd, writefd, POLLHUP);
}

ATF_TC(pollclosed_fifo1_immediate_readnone);
ATF_TC_HEAD(pollclosed_fifo1_immediate_readnone, tc)
{
        atf_tc_set_md_var(tc, "descr",
            "Checks POLLHUP with closing the second opener of a named pipe");
}
ATF_TC_BODY(pollclosed_fifo1_immediate_readnone, tc)
{
        int writefd, readfd;

        pollclosed_fifo0_setup(&writefd, &readfd); /* reverse r/w */
        /* don't fill the pipe buf */
        check_pollclosed_immediate_readnone(readfd, writefd, POLLHUP);
}

ATF_TC(pollclosed_fifo1_delayed_process_write);
ATF_TC_HEAD(pollclosed_fifo1_delayed_process_write, tc)
{
        atf_tc_set_md_var(tc, "descr",
            "Checks POLLHUP with closing the second opener of a named pipe");
}
ATF_TC_BODY(pollclosed_fifo1_delayed_process_write, tc)
{
        int writefd, readfd;

        pollclosed_fifo1_setup(&writefd, &readfd);
        fillpipebuf(writefd);
        check_pollclosed_delayed_process(writefd, readfd,
            &check_pollclosed_delayed_write_fifopipesocket);
}

ATF_TC(pollclosed_fifo1_delayed_process_read);
ATF_TC_HEAD(pollclosed_fifo1_delayed_process_read, tc)
{
        atf_tc_set_md_var(tc, "descr",
            "Checks POLLHUP with closing the second opener of a named pipe");
}
ATF_TC_BODY(pollclosed_fifo1_delayed_process_read, tc)
{
        int writefd, readfd;

        /*
         * poll(2) wakes up with POLLHUP|POLLIN, but the state isn't
         * persistent as it is supposed to be -- it returns nothing
         * after that.
         */
        atf_tc_expect_fail("PR kern/59056: poll POLLHUP bugs");

        pollclosed_fifo0_setup(&writefd, &readfd); /* reverse r/w */
        /* don't fill pipe buf */
        check_pollclosed_delayed_process(readfd, writefd,
            &check_pollclosed_delayed_read_devfifopipe);
}

ATF_TC(pollclosed_fifo1_delayed_thread_write);
ATF_TC_HEAD(pollclosed_fifo1_delayed_thread_write, tc)
{
        atf_tc_set_md_var(tc, "descr",
            "Checks POLLHUP with closing the second opener of a named pipe");
}
ATF_TC_BODY(pollclosed_fifo1_delayed_thread_write, tc)
{
        int writefd, readfd;

        pollclosed_fifo1_setup(&writefd, &readfd);
        fillpipebuf(writefd);
        check_pollclosed_delayed_thread(writefd, readfd,
            &check_pollclosed_delayed_write_fifopipesocket);
}

ATF_TC(pollclosed_fifo1_delayed_thread_read);
ATF_TC_HEAD(pollclosed_fifo1_delayed_thread_read, tc)
{
        atf_tc_set_md_var(tc, "descr",
            "Checks POLLHUP with closing the second opener of a named pipe");
}
ATF_TC_BODY(pollclosed_fifo1_delayed_thread_read, tc)
{
        int writefd, readfd;

        /*
         * poll(2) wakes up with POLLHUP|POLLIN, but the state isn't
         * persistent as it is supposed to be -- it returns nothing
         * after that.
         */
        atf_tc_expect_fail("PR kern/59056: poll POLLHUP bugs");

        pollclosed_fifo0_setup(&writefd, &readfd); /* reverse r/w */
        /* don't fill pipe buf */
        check_pollclosed_delayed_process(readfd, writefd,
            &check_pollclosed_delayed_read_devfifopipe);
}

ATF_TC(pollclosed_pipe_immediate_writefull);
ATF_TC_HEAD(pollclosed_pipe_immediate_writefull, tc)
{
        atf_tc_set_md_var(tc, "descr",
            "Checks POLLHUP with a closed pipe");
}
ATF_TC_BODY(pollclosed_pipe_immediate_writefull, tc)
{
        int writefd, readfd;

        /*
         * poll(2) returns POLLHUP|POLLOUT, which is forbidden --
         * POLLHUP and POLLOUT are mutually exclusive.  And POLLHUP is
         * only supposed to be returned by polling for read, not
         * polling for write.  So it should be POLLOUT.
         */
        atf_tc_expect_fail("PR kern/59056: poll POLLHUP bugs");

        pollclosed_pipe_setup(&writefd, &readfd);
        fillpipebuf(writefd);
        check_pollclosed_immediate_write(writefd, readfd, POLLOUT, EPIPE);
}

ATF_TC(pollclosed_pipe_immediate_writeempty);
ATF_TC_HEAD(pollclosed_pipe_immediate_writeempty, tc)
{
        atf_tc_set_md_var(tc, "descr",
            "Checks POLLHUP with a closed pipe");
}
ATF_TC_BODY(pollclosed_pipe_immediate_writeempty, tc)
{
        int writefd, readfd;

        /*
         * poll(2) returns POLLHUP|POLLOUT, which is forbidden --
         * POLLHUP and POLLOUT are mutually exclusive.  And POLLHUP is
         * only supposed to be returned by polling for read, not
         * polling for write.  So it should be POLLOUT.
         */
        atf_tc_expect_fail("PR kern/59056: poll POLLHUP bugs");

        pollclosed_pipe_setup(&writefd, &readfd);
        /* don't fill pipe buf */
        check_pollclosed_immediate_write(writefd, readfd, POLLOUT, EPIPE);
}

ATF_TC(pollclosed_pipe_immediate_readsome);
ATF_TC_HEAD(pollclosed_pipe_immediate_readsome, tc)
{
        atf_tc_set_md_var(tc, "descr",
            "Checks POLLHUP with a closed pipe");
}
ATF_TC_BODY(pollclosed_pipe_immediate_readsome, tc)
{
        int writefd, readfd;

        pollclosed_pipe_setup(&writefd, &readfd);
        fillpipebuf(writefd);
        check_pollclosed_immediate_readsome(readfd, writefd, POLLHUP);
}

ATF_TC(pollclosed_pipe_immediate_readnone);
ATF_TC_HEAD(pollclosed_pipe_immediate_readnone, tc)
{
        atf_tc_set_md_var(tc, "descr",
            "Checks POLLHUP with a closed pipe");
}
ATF_TC_BODY(pollclosed_pipe_immediate_readnone, tc)
{
        int writefd, readfd;

        pollclosed_pipe_setup(&writefd, &readfd);
        /* don't fill pipe buf */
        check_pollclosed_immediate_readnone(readfd, writefd, POLLHUP);
}

ATF_TC(pollclosed_pipe_delayed_process_write);
ATF_TC_HEAD(pollclosed_pipe_delayed_process_write, tc)
{
        atf_tc_set_md_var(tc, "descr",
            "Checks POLLHUP with a closed pipe");
}
ATF_TC_BODY(pollclosed_pipe_delayed_process_write, tc)
{
        int writefd, readfd;

        /*
         * poll(2) returns POLLHUP|POLLOUT, which is forbidden --
         * POLLHUP and POLLOUT are mutually exclusive.  And POLLHUP is
         * only supposed to be returned by polling for read, not
         * polling for write.  So it should be POLLOUT.
         */
        atf_tc_expect_fail("PR kern/59056: poll POLLHUP bugs");

        pollclosed_pipe_setup(&writefd, &readfd);
        fillpipebuf(writefd);
        check_pollclosed_delayed_process(writefd, readfd,
            &check_pollclosed_delayed_write_fifopipesocket);
}

ATF_TC(pollclosed_pipe_delayed_process_read);
ATF_TC_HEAD(pollclosed_pipe_delayed_process_read, tc)
{
        atf_tc_set_md_var(tc, "descr",
            "Checks POLLHUP with a closed pipe");
}
ATF_TC_BODY(pollclosed_pipe_delayed_process_read, tc)
{
        int writefd, readfd;

        pollclosed_pipe_setup(&writefd, &readfd);
        /* don't fill pipe buf */
        check_pollclosed_delayed_process(readfd, writefd,
            &check_pollclosed_delayed_read_devfifopipe);
}

ATF_TC(pollclosed_pipe_delayed_thread_write);
ATF_TC_HEAD(pollclosed_pipe_delayed_thread_write, tc)
{
        atf_tc_set_md_var(tc, "descr",
            "Checks POLLHUP with a closed pipe");
}
ATF_TC_BODY(pollclosed_pipe_delayed_thread_write, tc)
{
        int writefd, readfd;

        /*
         * poll(2) returns POLLHUP|POLLOUT, which is forbidden --
         * POLLHUP and POLLOUT are mutually exclusive.  And POLLHUP is
         * only supposed to be returned by polling for read, not
         * polling for write.  So it should be POLLOUT.
         */
        atf_tc_expect_fail("PR kern/59056: poll POLLHUP bugs");

        pollclosed_pipe_setup(&writefd, &readfd);
        fillpipebuf(writefd);
        check_pollclosed_delayed_thread(writefd, readfd,
            &check_pollclosed_delayed_write_fifopipesocket);
}

ATF_TC(pollclosed_pipe_delayed_thread_read);
ATF_TC_HEAD(pollclosed_pipe_delayed_thread_read, tc)
{
        atf_tc_set_md_var(tc, "descr",
            "Checks POLLHUP with a closed pipe");
}
ATF_TC_BODY(pollclosed_pipe_delayed_thread_read, tc)
{
        int writefd, readfd;

        pollclosed_pipe_setup(&writefd, &readfd);
        /* don't fill pipe buf */
        check_pollclosed_delayed_thread(readfd, writefd,
            &check_pollclosed_delayed_read_devfifopipe);
}

ATF_TC(pollclosed_ptyapp_immediate_writefull);
ATF_TC_HEAD(pollclosed_ptyapp_immediate_writefull, tc)
{
        atf_tc_set_md_var(tc, "descr",
            "Checks POLLHUP with closing the pty application side");
}
ATF_TC_BODY(pollclosed_ptyapp_immediate_writefull, tc)
{
        int writefd, readfd;

        pollclosed_ptyapp_setup(&writefd, &readfd);
        fillpipebuf(writefd);
        check_pollclosed_immediate_write(writefd, readfd, POLLHUP, EIO);
}

ATF_TC(pollclosed_ptyapp_immediate_writeempty);
ATF_TC_HEAD(pollclosed_ptyapp_immediate_writeempty, tc)
{
        atf_tc_set_md_var(tc, "descr",
            "Checks POLLHUP with closing the pty application side");
}
ATF_TC_BODY(pollclosed_ptyapp_immediate_writeempty, tc)
{
        int writefd, readfd;

        pollclosed_ptyapp_setup(&writefd, &readfd);
        /* don't fill the pipe buf */
        check_pollclosed_immediate_write(writefd, readfd, POLLHUP, EIO);
}

ATF_TC(pollclosed_ptyapp_immediate_readsome);
ATF_TC_HEAD(pollclosed_ptyapp_immediate_readsome, tc)
{
        atf_tc_set_md_var(tc, "descr",
            "Checks POLLHUP with closing the pty application side");
}
ATF_TC_BODY(pollclosed_ptyapp_immediate_readsome, tc)
{
        int writefd, readfd;

        /*
         * poll(2) returns POLLHUP but not POLLIN even though read(2)
         * would return EOF without blocking.
         */
        atf_tc_expect_fail("PR kern/59056: poll POLLHUP bugs");

        pollclosed_ptyhost_setup(&writefd, &readfd); /* reverse r/w */
        fillpipebuf(writefd);
        check_pollclosed_immediate_readsome(readfd, writefd, POLLHUP);
}

ATF_TC(pollclosed_ptyapp_immediate_readnone);
ATF_TC_HEAD(pollclosed_ptyapp_immediate_readnone, tc)
{
        atf_tc_set_md_var(tc, "descr",
            "Checks POLLHUP with closing the pty application side");
}
ATF_TC_BODY(pollclosed_ptyapp_immediate_readnone, tc)
{
        int writefd, readfd;

        /*
         * poll(2) returns POLLHUP but not POLLIN even though read(2)
         * would return EOF without blocking.
         */
        atf_tc_expect_fail("PR kern/59056: poll POLLHUP bugs");

        pollclosed_ptyhost_setup(&writefd, &readfd); /* reverse r/w */
        /* don't fill the pipe buf */
        check_pollclosed_immediate_readnone(readfd, writefd, POLLHUP);
}

ATF_TC(pollclosed_ptyapp_delayed_process_write);
ATF_TC_HEAD(pollclosed_ptyapp_delayed_process_write, tc)
{
        atf_tc_set_md_var(tc, "descr",
            "Checks POLLHUP with closing the pty application side");
}
ATF_TC_BODY(pollclosed_ptyapp_delayed_process_write, tc)
{
        int writefd, readfd;

        /*
         * The poll(2) call is not woken by the concurrent close(2)
         * call.
         */
        atf_tc_expect_signal(SIGALRM, "PR kern/59056: poll POLLHUP bugs");

        pollclosed_ptyapp_setup(&writefd, &readfd);
        fillpipebuf(writefd);
        check_pollclosed_delayed_process(writefd, readfd,
            &check_pollclosed_delayed_write_terminal);
}

ATF_TC(pollclosed_ptyapp_delayed_process_read);
ATF_TC_HEAD(pollclosed_ptyapp_delayed_process_read, tc)
{
        atf_tc_set_md_var(tc, "descr",
            "Checks POLLHUP with closing the pty application side");
}
ATF_TC_BODY(pollclosed_ptyapp_delayed_process_read, tc)
{
        int writefd, readfd;

        /*
         * poll(2) returns POLLHUP but not POLLIN even though read(2)
         * would return EOF without blocking.
         */
        atf_tc_expect_fail("PR kern/59056: poll POLLHUP bugs");

        pollclosed_ptyhost_setup(&writefd, &readfd); /* reverse r/w */
        /* don't fill pipe buf */
        check_pollclosed_delayed_process(readfd, writefd,
            &check_pollclosed_delayed_read_devfifopipe);
}

ATF_TC(pollclosed_ptyapp_delayed_thread_write);
ATF_TC_HEAD(pollclosed_ptyapp_delayed_thread_write, tc)
{
        atf_tc_set_md_var(tc, "descr",
            "Checks POLLHUP with closing the pty application side");
}
ATF_TC_BODY(pollclosed_ptyapp_delayed_thread_write, tc)
{
        int writefd, readfd;

        /*
         * The poll(2) call is not woken by the concurrent close(2)
         * call.
         */
        atf_tc_expect_signal(SIGALRM, "PR kern/59056: poll POLLHUP bugs");

        pollclosed_ptyapp_setup(&writefd, &readfd);
        fillpipebuf(writefd);
        check_pollclosed_delayed_thread(writefd, readfd,
            &check_pollclosed_delayed_write_terminal);
}

ATF_TC(pollclosed_ptyapp_delayed_thread_read);
ATF_TC_HEAD(pollclosed_ptyapp_delayed_thread_read, tc)
{
        atf_tc_set_md_var(tc, "descr",
            "Checks POLLHUP with closing the pty application side");
}
ATF_TC_BODY(pollclosed_ptyapp_delayed_thread_read, tc)
{
        int writefd, readfd;

        /*
         * poll(2) returns POLLHUP but not POLLIN even though read(2)
         * would return EOF without blocking.
         */
        atf_tc_expect_fail("PR kern/59056: poll POLLHUP bugs");

        pollclosed_ptyhost_setup(&writefd, &readfd); /* reverse r/w */
        /* don't fill pipe buf */
        check_pollclosed_delayed_process(readfd, writefd,
            &check_pollclosed_delayed_read_devfifopipe);
}

ATF_TC(pollclosed_ptyhost_immediate_writefull);
ATF_TC_HEAD(pollclosed_ptyhost_immediate_writefull, tc)
{
        atf_tc_set_md_var(tc, "descr",
            "Checks POLLHUP with closing the pty host side");
}
ATF_TC_BODY(pollclosed_ptyhost_immediate_writefull, tc)
{
        int writefd, readfd;

        pollclosed_ptyhost_setup(&writefd, &readfd);
        fillpipebuf(writefd);
        check_pollclosed_immediate_write(writefd, readfd, POLLHUP, EIO);
}

ATF_TC(pollclosed_ptyhost_immediate_writeempty);
ATF_TC_HEAD(pollclosed_ptyhost_immediate_writeempty, tc)
{
        atf_tc_set_md_var(tc, "descr",
            "Checks POLLHUP with closing the pty host side");
}
ATF_TC_BODY(pollclosed_ptyhost_immediate_writeempty, tc)
{
        int writefd, readfd;

        pollclosed_ptyhost_setup(&writefd, &readfd);
        /* don't fill the pipe buf */
        check_pollclosed_immediate_write(writefd, readfd, POLLHUP, EIO);
}

ATF_TC(pollclosed_ptyhost_immediate_readsome);
ATF_TC_HEAD(pollclosed_ptyhost_immediate_readsome, tc)
{
        atf_tc_set_md_var(tc, "descr",
            "Checks POLLHUP with closing the pty host side");
}
ATF_TC_BODY(pollclosed_ptyhost_immediate_readsome, tc)
{
        int writefd, readfd;

        /*
         * poll(2) returns POLLHUP but not POLLIN even though read(2)
         * would return EOF without blocking.
         */
        atf_tc_expect_fail("PR kern/59056: poll POLLHUP bugs");

        pollclosed_ptyapp_setup(&writefd, &readfd); /* reverse r/w */
        fillpipebuf(writefd);
        check_pollclosed_immediate_readsome(readfd, writefd, POLLHUP);
}

ATF_TC(pollclosed_ptyhost_immediate_readnone);
ATF_TC_HEAD(pollclosed_ptyhost_immediate_readnone, tc)
{
        atf_tc_set_md_var(tc, "descr",
            "Checks POLLHUP with closing the pty host side");
}
ATF_TC_BODY(pollclosed_ptyhost_immediate_readnone, tc)
{
        int writefd, readfd;

        /*
         * poll(2) returns POLLHUP but not POLLIN even though read(2)
         * would return EOF without blocking.
         */
        atf_tc_expect_fail("PR kern/59056: poll POLLHUP bugs");

        pollclosed_ptyapp_setup(&writefd, &readfd); /* reverse r/w */
        /* don't fill the pipe buf */
        check_pollclosed_immediate_readnone(readfd, writefd, POLLHUP);
}

ATF_TC(pollclosed_ptyhost_delayed_process_write);
ATF_TC_HEAD(pollclosed_ptyhost_delayed_process_write, tc)
{
        atf_tc_set_md_var(tc, "descr",
            "Checks POLLHUP with closing the pty host side");
}
ATF_TC_BODY(pollclosed_ptyhost_delayed_process_write, tc)
{
        int writefd, readfd;

        pollclosed_ptyhost_setup(&writefd, &readfd);
        fillpipebuf(writefd);
        check_pollclosed_delayed_process(writefd, readfd,
            &check_pollclosed_delayed_write_terminal);
}

ATF_TC(pollclosed_ptyhost_delayed_process_read);
ATF_TC_HEAD(pollclosed_ptyhost_delayed_process_read, tc)
{
        atf_tc_set_md_var(tc, "descr",
            "Checks POLLHUP with closing the pty host side");
}
ATF_TC_BODY(pollclosed_ptyhost_delayed_process_read, tc)
{
        int writefd, readfd;

        /*
         * poll(2) returns POLLHUP but not POLLIN even though read(2)
         * would return EOF without blocking.
         */
        atf_tc_expect_fail("PR kern/59056: poll POLLHUP bugs");

        pollclosed_ptyapp_setup(&writefd, &readfd); /* reverse r/w */
        /* don't fill pipe buf */
        check_pollclosed_delayed_process(readfd, writefd,
            &check_pollclosed_delayed_read_devfifopipe);
}

ATF_TC(pollclosed_ptyhost_delayed_thread_write);
ATF_TC_HEAD(pollclosed_ptyhost_delayed_thread_write, tc)
{
        atf_tc_set_md_var(tc, "descr",
            "Checks POLLHUP with closing the pty host side");
}
ATF_TC_BODY(pollclosed_ptyhost_delayed_thread_write, tc)
{
        int writefd, readfd;

        pollclosed_ptyhost_setup(&writefd, &readfd);
        fillpipebuf(writefd);
        check_pollclosed_delayed_thread(writefd, readfd,
            &check_pollclosed_delayed_write_terminal);
}

ATF_TC(pollclosed_ptyhost_delayed_thread_read);
ATF_TC_HEAD(pollclosed_ptyhost_delayed_thread_read, tc)
{
        atf_tc_set_md_var(tc, "descr",
            "Checks POLLHUP with closing the pty host side");
}
ATF_TC_BODY(pollclosed_ptyhost_delayed_thread_read, tc)
{
        int writefd, readfd;

        /*
         * poll(2) returns POLLHUP but not POLLIN even though read(2)
         * would return EOF without blocking.
         */
        atf_tc_expect_fail("PR kern/59056: poll POLLHUP bugs");

        pollclosed_ptyapp_setup(&writefd, &readfd); /* reverse r/w */
        /* don't fill pipe buf */
        check_pollclosed_delayed_thread(readfd, writefd,
            &check_pollclosed_delayed_read_devfifopipe);
}

ATF_TC(pollclosed_socketpair0_immediate_writefull);
ATF_TC_HEAD(pollclosed_socketpair0_immediate_writefull, tc)
{
        atf_tc_set_md_var(tc, "descr",
            "Checks POLLHUP with closing the first half of a socketpair");
}
ATF_TC_BODY(pollclosed_socketpair0_immediate_writefull, tc)
{
        int writefd, readfd;

        pollclosed_socketpair0_setup(&writefd, &readfd);
        fillpipebuf(writefd);
        check_pollclosed_immediate_write(writefd, readfd, POLLOUT, EPIPE);
}

ATF_TC(pollclosed_socketpair0_immediate_writeempty);
ATF_TC_HEAD(pollclosed_socketpair0_immediate_writeempty, tc)
{
        atf_tc_set_md_var(tc, "descr",
            "Checks POLLHUP with closing the first half of a socketpair");
}
ATF_TC_BODY(pollclosed_socketpair0_immediate_writeempty, tc)
{
        int writefd, readfd;

        pollclosed_socketpair0_setup(&writefd, &readfd);
        /* don't fill the pipe buf */
        check_pollclosed_immediate_write(writefd, readfd, POLLOUT, EPIPE);
}

ATF_TC(pollclosed_socketpair0_immediate_readsome);
ATF_TC_HEAD(pollclosed_socketpair0_immediate_readsome, tc)
{
        atf_tc_set_md_var(tc, "descr",
            "Checks POLLHUP with closing the first half of a socketpair");
}
ATF_TC_BODY(pollclosed_socketpair0_immediate_readsome, tc)
{
        int writefd, readfd;

        pollclosed_socketpair1_setup(&writefd, &readfd); /* reverse r/w */
        fillpipebuf(writefd);
        check_pollclosed_immediate_readsome(readfd, writefd, /*no POLLHUP*/0);
}

ATF_TC(pollclosed_socketpair0_immediate_readnone);
ATF_TC_HEAD(pollclosed_socketpair0_immediate_readnone, tc)
{
        atf_tc_set_md_var(tc, "descr",
            "Checks POLLHUP with closing the first half of a socketpair");
}
ATF_TC_BODY(pollclosed_socketpair0_immediate_readnone, tc)
{
        int writefd, readfd;

        pollclosed_socketpair1_setup(&writefd, &readfd); /* reverse r/w */
        /* don't fill the pipe buf */
        check_pollclosed_immediate_readnone(readfd, writefd, /*no POLLHUP*/0);
}

ATF_TC(pollclosed_socketpair0_delayed_process_write);
ATF_TC_HEAD(pollclosed_socketpair0_delayed_process_write, tc)
{
        atf_tc_set_md_var(tc, "descr",
            "Checks POLLHUP with closing the first half of a socketpair");
}
ATF_TC_BODY(pollclosed_socketpair0_delayed_process_write, tc)
{
        int writefd, readfd;

        pollclosed_socketpair0_setup(&writefd, &readfd);
        fillpipebuf(writefd);
        check_pollclosed_delayed_process(writefd, readfd,
            &check_pollclosed_delayed_write_fifopipesocket);
}

ATF_TC(pollclosed_socketpair0_delayed_process_read);
ATF_TC_HEAD(pollclosed_socketpair0_delayed_process_read, tc)
{
        atf_tc_set_md_var(tc, "descr",
            "Checks POLLHUP with closing the first half of a socketpair");
}
ATF_TC_BODY(pollclosed_socketpair0_delayed_process_read, tc)
{
        int writefd, readfd;

        pollclosed_socketpair1_setup(&writefd, &readfd); /* reverse r/w */
        /* don't fill pipe buf */
        check_pollclosed_delayed_process(readfd, writefd,
            &check_pollclosed_delayed_read_socket);
}

ATF_TC(pollclosed_socketpair0_delayed_thread_write);
ATF_TC_HEAD(pollclosed_socketpair0_delayed_thread_write, tc)
{
        atf_tc_set_md_var(tc, "descr",
            "Checks POLLHUP with closing the first half of a socketpair");
}
ATF_TC_BODY(pollclosed_socketpair0_delayed_thread_write, tc)
{
        int writefd, readfd;

        pollclosed_socketpair0_setup(&writefd, &readfd);
        fillpipebuf(writefd);
        check_pollclosed_delayed_thread(writefd, readfd,
            &check_pollclosed_delayed_write_fifopipesocket);
}

ATF_TC(pollclosed_socketpair0_delayed_thread_read);
ATF_TC_HEAD(pollclosed_socketpair0_delayed_thread_read, tc)
{
        atf_tc_set_md_var(tc, "descr",
            "Checks POLLHUP with closing the first half of a socketpair");
}
ATF_TC_BODY(pollclosed_socketpair0_delayed_thread_read, tc)
{
        int writefd, readfd;

        pollclosed_socketpair1_setup(&writefd, &readfd); /* reverse r/w */
        /* don't fill pipe buf */
        check_pollclosed_delayed_thread(readfd, writefd,
            &check_pollclosed_delayed_read_socket);
}

ATF_TC(pollclosed_socketpair1_immediate_writefull);
ATF_TC_HEAD(pollclosed_socketpair1_immediate_writefull, tc)
{
        atf_tc_set_md_var(tc, "descr",
            "Checks POLLHUP with closing the second half of a socketpair");
}
ATF_TC_BODY(pollclosed_socketpair1_immediate_writefull, tc)
{
        int writefd, readfd;

        pollclosed_socketpair1_setup(&writefd, &readfd);
        fillpipebuf(writefd);
        check_pollclosed_immediate_write(writefd, readfd, POLLOUT, EPIPE);
}

ATF_TC(pollclosed_socketpair1_immediate_writeempty);
ATF_TC_HEAD(pollclosed_socketpair1_immediate_writeempty, tc)
{
        atf_tc_set_md_var(tc, "descr",
            "Checks POLLHUP with closing the second half of a socketpair");
}
ATF_TC_BODY(pollclosed_socketpair1_immediate_writeempty, tc)
{
        int writefd, readfd;

        pollclosed_socketpair1_setup(&writefd, &readfd);
        /* don't fill the pipe buf */
        check_pollclosed_immediate_write(writefd, readfd, POLLOUT, EPIPE);
}

ATF_TC(pollclosed_socketpair1_immediate_readsome);
ATF_TC_HEAD(pollclosed_socketpair1_immediate_readsome, tc)
{
        atf_tc_set_md_var(tc, "descr",
            "Checks POLLHUP with closing the second half of a socketpair");
}
ATF_TC_BODY(pollclosed_socketpair1_immediate_readsome, tc)
{
        int writefd, readfd;

        pollclosed_socketpair0_setup(&writefd, &readfd); /* reverse r/w */
        fillpipebuf(writefd);
        check_pollclosed_immediate_readsome(readfd, writefd, /*no POLLHUP*/0);
}

ATF_TC(pollclosed_socketpair1_immediate_readnone);
ATF_TC_HEAD(pollclosed_socketpair1_immediate_readnone, tc)
{
        atf_tc_set_md_var(tc, "descr",
            "Checks POLLHUP with closing the second half of a socketpair");
}
ATF_TC_BODY(pollclosed_socketpair1_immediate_readnone, tc)
{
        int writefd, readfd;

        pollclosed_socketpair0_setup(&writefd, &readfd); /* reverse r/w */
        /* don't fill the pipe buf */
        check_pollclosed_immediate_readnone(readfd, writefd, /*no POLLHUP*/0);
}

ATF_TC(pollclosed_socketpair1_delayed_process_write);
ATF_TC_HEAD(pollclosed_socketpair1_delayed_process_write, tc)
{
        atf_tc_set_md_var(tc, "descr",
            "Checks POLLHUP with closing the second half of a socketpair");
}
ATF_TC_BODY(pollclosed_socketpair1_delayed_process_write, tc)
{
        int writefd, readfd;

        pollclosed_socketpair1_setup(&writefd, &readfd);
        fillpipebuf(writefd);
        check_pollclosed_delayed_process(writefd, readfd,
            &check_pollclosed_delayed_write_fifopipesocket);
}

ATF_TC(pollclosed_socketpair1_delayed_process_read);
ATF_TC_HEAD(pollclosed_socketpair1_delayed_process_read, tc)
{
        atf_tc_set_md_var(tc, "descr",
            "Checks POLLHUP with closing the second half of a socketpair");
}
ATF_TC_BODY(pollclosed_socketpair1_delayed_process_read, tc)
{
        int writefd, readfd;

        pollclosed_socketpair0_setup(&writefd, &readfd); /* reverse r/w */
        /* don't fill pipe buf */
        check_pollclosed_delayed_process(readfd, writefd,
            &check_pollclosed_delayed_read_socket);
}

ATF_TC(pollclosed_socketpair1_delayed_thread_write);
ATF_TC_HEAD(pollclosed_socketpair1_delayed_thread_write, tc)
{
        atf_tc_set_md_var(tc, "descr",
            "Checks POLLHUP with closing the second half of a socketpair");
}
ATF_TC_BODY(pollclosed_socketpair1_delayed_thread_write, tc)
{
        int writefd, readfd;

        pollclosed_socketpair1_setup(&writefd, &readfd);
        fillpipebuf(writefd);
        check_pollclosed_delayed_thread(writefd, readfd,
            &check_pollclosed_delayed_write_fifopipesocket);
}

ATF_TC(pollclosed_socketpair1_delayed_thread_read);
ATF_TC_HEAD(pollclosed_socketpair1_delayed_thread_read, tc)
{
        atf_tc_set_md_var(tc, "descr",
            "Checks POLLHUP with closing the second half of a socketpair");
}
ATF_TC_BODY(pollclosed_socketpair1_delayed_thread_read, tc)
{
        int writefd, readfd;

        pollclosed_socketpair0_setup(&writefd, &readfd); /* reverse r/w */
        /* don't fill pipe buf */
        check_pollclosed_delayed_process(readfd, writefd,
            &check_pollclosed_delayed_read_socket);
}

ATF_TP_ADD_TCS(tp)
{

        ATF_TP_ADD_TC(tp, 3way);
        ATF_TP_ADD_TC(tp, basic);
        ATF_TP_ADD_TC(tp, err);

        ATF_TP_ADD_TC(tp, fifo_inout);
        ATF_TP_ADD_TC(tp, fifo_hup1);
        ATF_TP_ADD_TC(tp, fifo_hup2);

        ATF_TP_ADD_TC(tp, pollclosed_fifo0_immediate_writefull);
        ATF_TP_ADD_TC(tp, pollclosed_fifo1_immediate_writefull);
        ATF_TP_ADD_TC(tp, pollclosed_pipe_immediate_writefull);
        ATF_TP_ADD_TC(tp, pollclosed_ptyapp_immediate_writefull);
        ATF_TP_ADD_TC(tp, pollclosed_ptyhost_immediate_writefull);
        ATF_TP_ADD_TC(tp, pollclosed_socketpair0_immediate_writefull);
        ATF_TP_ADD_TC(tp, pollclosed_socketpair1_immediate_writefull);

        ATF_TP_ADD_TC(tp, pollclosed_fifo0_immediate_writeempty);
        ATF_TP_ADD_TC(tp, pollclosed_fifo1_immediate_writeempty);
        ATF_TP_ADD_TC(tp, pollclosed_pipe_immediate_writeempty);
        ATF_TP_ADD_TC(tp, pollclosed_ptyapp_immediate_writeempty);
        ATF_TP_ADD_TC(tp, pollclosed_ptyhost_immediate_writeempty);
        ATF_TP_ADD_TC(tp, pollclosed_socketpair0_immediate_writeempty);
        ATF_TP_ADD_TC(tp, pollclosed_socketpair1_immediate_writeempty);

        ATF_TP_ADD_TC(tp, pollclosed_fifo0_immediate_readsome);
        ATF_TP_ADD_TC(tp, pollclosed_fifo1_immediate_readsome);
        ATF_TP_ADD_TC(tp, pollclosed_pipe_immediate_readsome);
        ATF_TP_ADD_TC(tp, pollclosed_ptyapp_immediate_readsome);
        ATF_TP_ADD_TC(tp, pollclosed_ptyhost_immediate_readsome);
        ATF_TP_ADD_TC(tp, pollclosed_socketpair0_immediate_readsome);
        ATF_TP_ADD_TC(tp, pollclosed_socketpair1_immediate_readsome);

        ATF_TP_ADD_TC(tp, pollclosed_fifo0_immediate_readnone);
        ATF_TP_ADD_TC(tp, pollclosed_fifo1_immediate_readnone);
        ATF_TP_ADD_TC(tp, pollclosed_pipe_immediate_readnone);
        ATF_TP_ADD_TC(tp, pollclosed_ptyapp_immediate_readnone);
        ATF_TP_ADD_TC(tp, pollclosed_ptyhost_immediate_readnone);
        ATF_TP_ADD_TC(tp, pollclosed_socketpair0_immediate_readnone);
        ATF_TP_ADD_TC(tp, pollclosed_socketpair1_immediate_readnone);

        ATF_TP_ADD_TC(tp, pollclosed_fifo0_delayed_process_write);
        ATF_TP_ADD_TC(tp, pollclosed_fifo1_delayed_process_write);
        ATF_TP_ADD_TC(tp, pollclosed_pipe_delayed_process_write);
        ATF_TP_ADD_TC(tp, pollclosed_ptyapp_delayed_process_write);
        ATF_TP_ADD_TC(tp, pollclosed_ptyhost_delayed_process_write);
        ATF_TP_ADD_TC(tp, pollclosed_socketpair0_delayed_process_write);
        ATF_TP_ADD_TC(tp, pollclosed_socketpair1_delayed_process_write);

        ATF_TP_ADD_TC(tp, pollclosed_fifo0_delayed_process_read);
        ATF_TP_ADD_TC(tp, pollclosed_fifo1_delayed_process_read);
        ATF_TP_ADD_TC(tp, pollclosed_pipe_delayed_process_read);
        ATF_TP_ADD_TC(tp, pollclosed_ptyapp_delayed_process_read);
        ATF_TP_ADD_TC(tp, pollclosed_ptyhost_delayed_process_read);
        ATF_TP_ADD_TC(tp, pollclosed_socketpair0_delayed_process_read);
        ATF_TP_ADD_TC(tp, pollclosed_socketpair1_delayed_process_read);

        ATF_TP_ADD_TC(tp, pollclosed_fifo0_delayed_thread_write);
        ATF_TP_ADD_TC(tp, pollclosed_fifo1_delayed_thread_write);
        ATF_TP_ADD_TC(tp, pollclosed_pipe_delayed_thread_write);
        ATF_TP_ADD_TC(tp, pollclosed_ptyapp_delayed_thread_write);
        ATF_TP_ADD_TC(tp, pollclosed_ptyhost_delayed_thread_write);
        ATF_TP_ADD_TC(tp, pollclosed_socketpair0_delayed_thread_write);
        ATF_TP_ADD_TC(tp, pollclosed_socketpair1_delayed_thread_write);

        ATF_TP_ADD_TC(tp, pollclosed_fifo0_delayed_thread_read);
        ATF_TP_ADD_TC(tp, pollclosed_fifo1_delayed_thread_read);
        ATF_TP_ADD_TC(tp, pollclosed_pipe_delayed_thread_read);
        ATF_TP_ADD_TC(tp, pollclosed_ptyapp_delayed_thread_read);
        ATF_TP_ADD_TC(tp, pollclosed_ptyhost_delayed_thread_read);
        ATF_TP_ADD_TC(tp, pollclosed_socketpair0_delayed_thread_read);
        ATF_TP_ADD_TC(tp, pollclosed_socketpair1_delayed_thread_read);

        return atf_no_error();
}