source: rtems-libbsd/testsuite/selectpollkqueue01/test_main.c @ 2e5f808

/**
 * @file
 *
 * The following system calls are tested: select(), pselect(), poll(), kqueue() and pipe().
 */

/*
 * Copyright (c) 2013, 2019 embedded brains GmbH.  All rights reserved.
 *
 *  embedded brains GmbH
 *  Dornierstr. 4
 *  82178 Puchheim
 *  Germany
 *  <rtems@embedded-brains.de>
 *
 * 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 AUTHOR 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 AUTHOR 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/param.h>
#include <sys/types.h>
#include <sys/event.h>
#include <sys/filio.h>
#include <sys/select.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <arpa/inet.h>
#include <netinet/in.h>
#include <assert.h>
#include <errno.h>
#include <fcntl.h>
#include <inttypes.h>
#include <poll.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sysexits.h>
#include <unistd.h>

#include <machine/rtems-bsd-commands.h>

#include <rtems/libcsupport.h>
#include <rtems.h>

#define TEST_NAME "LIBBSD SELECT AND POLL AND KQUEUE AND PIPE 1"

#define PRIO_MASTER 1

#define PRIO_WORKER 2

#define EVENT_READ RTEMS_EVENT_0

#define EVENT_WRITE RTEMS_EVENT_1

#define EVENT_CONNECT RTEMS_EVENT_2

#define EVENT_CLOSE RTEMS_EVENT_3

#define EVENT_SHUTDOWN RTEMS_EVENT_4

#define EVENT_CLOSE_PIPE RTEMS_EVENT_5

#define BUF_SIZE 4096

#define PORT 1234

#define TEST_UDATA ((void *) 0xcafe)

typedef struct {
        char buf[BUF_SIZE];
        const char *wbuf;
        char *rbuf;
        size_t rn;
        size_t wn;
        int lfd;
        int cfd;
        int afd;
        int rfd;
        int wfd;
        int pfd[2];
        struct sockaddr_in caddr;
        rtems_id worker_task;
} test_context;

static test_context test_instance = {
        .cfd = -1
};

static const char msg[] = "This is a message.  One two three.";

static void
setup_lo0(void)
{
        int exit_code;
        char *lo0[] = {
                "ifconfig",
                "lo0",
                "inet",
                "127.0.0.1",
                "netmask",
                "255.255.255.0",
                NULL
        };

        exit_code = rtems_bsd_command_ifconfig(RTEMS_ARRAY_SIZE(lo0) - 1, lo0);
        assert(exit_code == EX_OK);
}

static void
set_self_prio(rtems_task_priority prio)
{
        rtems_status_code sc;

        sc = rtems_task_set_priority(RTEMS_SELF, prio, &prio);
        assert(sc == RTEMS_SUCCESSFUL);
}

static void
create_server_socket(test_context *ctx)
{
        struct sockaddr_in saddr;
        int rv;
        int lfd;

        lfd = socket(PF_INET, SOCK_STREAM, 0);
        assert(lfd >= 0);

        memset(&saddr, 0, sizeof(saddr));
        saddr.sin_family = AF_INET;
        saddr.sin_port = htons(PORT);
        saddr.sin_addr.s_addr = htonl(INADDR_ANY);

        rv = bind(lfd, (const struct sockaddr *) &saddr, sizeof(saddr));
        assert(rv == 0);

        rv = listen(lfd, 1);
        assert(rv == 0);

        ctx->lfd = lfd;
}

static void
create_client_addr(test_context *ctx)
{
        struct sockaddr_in *caddr = &ctx->caddr;;
        int ok;

        memset(caddr, 0, sizeof(*caddr));
        caddr->sin_family = AF_INET;
        caddr->sin_port = htons(PORT);
        ok = inet_aton("127.0.0.1", &caddr->sin_addr);
        assert(ok != 0);
}

static void
worker_task(rtems_task_argument arg)
{
        test_context *ctx = (test_context *) arg;

        while (true) {
                rtems_status_code sc;
                rtems_event_set events;
                ssize_t n;
                int rv;
                int cfd = ctx->cfd;
                int rfd = ctx->pfd[0];
                int wfd = ctx->pfd[1];

                sc = rtems_event_receive(
                        RTEMS_ALL_EVENTS,
                        RTEMS_EVENT_ANY | RTEMS_WAIT,
                        RTEMS_NO_TIMEOUT,
                        &events
                );
                assert(sc == RTEMS_SUCCESSFUL);

                if ((events & EVENT_READ) != 0) {
                        puts("worker: read");

                        n = read(ctx->rfd, &ctx->rbuf[0], ctx->rn);
                        assert(n == (ssize_t) ctx->rn);
                }

                if ((events & EVENT_WRITE) != 0) {
                        puts("worker: write");

                        n = write(ctx->wfd, &ctx->wbuf[0], ctx->wn);
                        assert(n == (ssize_t) ctx->wn);
                }

                if ((events & EVENT_CONNECT) != 0) {
                        if (cfd >= 0) {
                                puts("worker: close connect socket");

                                ctx->cfd = -1;

                                rv = close(cfd);
                                assert(rv == 0);

                                cfd = -1;
                        }

                        if (cfd < 0) {
                                puts("worker: create new connect socket");

                                cfd = socket(PF_INET, SOCK_STREAM, 0);
                                assert(cfd >= 0);

                                ctx->cfd = cfd;
                        }

                        puts("worker: connect");

                        rv = connect(
                                cfd,
                                (const struct sockaddr *) &ctx->caddr,
                                sizeof(ctx->caddr)
                        );
                        assert(rv == 0);
                }

                if ((events & EVENT_CLOSE) != 0) {
                        puts("worker: close");

                        ctx->cfd = -1;

                        rv = close(cfd);
                        assert(rv == 0);
                }

                if ((events & EVENT_CLOSE_PIPE) != 0) {
                        puts("worker: close pipe");

                        ctx->pfd[0] = -1;
                        ctx->pfd[1] = -1;

                        rv = close(wfd);
                        assert(rv == 0);

                        rv = close(rfd);
                        assert(rv == 0);
                }

                if ((events & EVENT_SHUTDOWN) != 0) {
                        puts("worker: shutdown");

                        rv = shutdown(cfd, SHUT_RDWR);
                        assert(rv == 0);
                }
        }
}

static void
send_events(test_context *ctx, rtems_event_set events)
{
        rtems_status_code sc;

        sc = rtems_event_send(ctx->worker_task, events);
        assert(sc == RTEMS_SUCCESSFUL);
}

static void
start_worker(test_context *ctx)
{
        rtems_status_code sc;

        sc = rtems_task_create(
                rtems_build_name('W', 'O', 'R', 'K'),
                PRIO_WORKER,
                RTEMS_MINIMUM_STACK_SIZE,
                RTEMS_DEFAULT_MODES,
                RTEMS_FLOATING_POINT,
                &ctx->worker_task
        );
        assert(sc == RTEMS_SUCCESSFUL);

        sc = rtems_task_start(
                ctx->worker_task,
                worker_task,
                (rtems_task_argument) ctx
        );
        assert(sc == RTEMS_SUCCESSFUL);
}

static void
set_non_blocking(int fd, int enable)
{
        int rv;
        int flags = fcntl(fd, F_GETFL, 0);

        if (enable) {
                rv = fcntl(fd, F_SETFL, flags | O_NONBLOCK);
        } else {
                rv = fcntl(fd, F_SETFL, flags & ~O_NONBLOCK);
        }
        assert(rv == 0);
}

static void
test_select_timeout(test_context *ctx)
{
        struct timeval timeout = {
                .tv_sec = 0,
                .tv_usec = 100000
        };
        int fd = ctx->lfd;
        int nfds = fd + 1;
        struct fd_set set;
        int rv;
        int i;

        puts("test select timeout");

        set_non_blocking(ctx->lfd, 0);

        FD_ZERO(&set);
        FD_SET(fd, &set);

        rv = select(nfds, &set, NULL, NULL, &timeout);
        assert(rv == 0);

        for (i = 0; i < nfds; ++i) {
                assert(!FD_ISSET(i, &set));
        }

        rv = select(nfds, NULL, &set, NULL, &timeout);
        assert(rv == 0);

        for (i = 0; i < nfds; ++i) {
                assert(!FD_ISSET(i, &set));
        }

        rv = select(nfds, NULL, NULL, &set, &timeout);
        assert(rv == 0);

        for (i = 0; i < nfds; ++i) {
                assert(!FD_ISSET(i, &set));
        }
}

static void
test_select_connect(test_context *ctx)
{
        int lfd = ctx->lfd;
        int afd = ctx->afd;
        int nfds = lfd + 1;
        struct fd_set set;
        int rv;
        int i;

        puts("test select connect");

        if (afd >= 0) {
                ctx->afd = -1;

                rv = close(afd);
                assert(rv == 0);
        }

        send_events(ctx, EVENT_CONNECT);

        set_non_blocking(lfd, 1);

        errno = 0;
        afd = accept(lfd, NULL, NULL);
        assert(afd == -1);
        assert(errno == EAGAIN);

        set_non_blocking(lfd, 0);

        FD_ZERO(&set);
        FD_SET(lfd, &set);

        rv = select(nfds, &set, NULL, NULL, NULL);
        assert(rv == 1);

        for (i = 0; i < nfds; ++i) {
                bool is_set_expected = i == lfd;
                bool is_set = FD_ISSET(i, &set);

                assert(is_set_expected == is_set);
        }

        afd = accept(lfd, NULL, NULL);
        assert(afd >= 0);

        ctx->afd = afd;
}

static void
test_select_read(test_context *ctx)
{
        int afd = ctx->afd;
        int cfd = ctx->cfd;
        int nfds = afd + 1;
        struct fd_set set;
        int rv;
        int i;
        ssize_t n;

        puts("test select read");

        assert(afd >= 0);
        assert(cfd >= 0);

        ctx->wfd = cfd;
        ctx->wbuf = &msg[0];
        ctx->wn = sizeof(msg);
        send_events(ctx, EVENT_WRITE);

        set_non_blocking(afd, 1);

        errno = 0;
        n = read(afd, &ctx->buf[0], sizeof(ctx->buf));
        assert(n == -1);
        assert(errno == EAGAIN);

        FD_ZERO(&set);
        FD_SET(afd, &set);

        rv = select(nfds, &set, NULL, NULL, NULL);
        assert(rv == 1);

        for (i = 0; i < nfds; ++i) {
                bool is_set_expected = i == afd;
                bool is_set = FD_ISSET(i, &set);

                assert(is_set_expected == is_set);
        }

        n = read(afd, &ctx->buf[0], sizeof(ctx->buf));
        assert(n == (ssize_t) sizeof(msg));
        assert(memcmp(&msg[0], &ctx->buf[0], sizeof(msg)) == 0);
}

static void
test_select_write(test_context *ctx)
{
        int afd = ctx->afd;
        int cfd = ctx->cfd;
        int nfds = afd + 1;
        struct fd_set set;
        int rv;
        int i;
        ssize_t n;

        puts("test select write");

        assert(afd >= 0);
        assert(cfd >= 0);

        ctx->rfd = cfd;
        ctx->rbuf = &ctx->buf[0];
        ctx->rn = sizeof(ctx->buf);
        send_events(ctx, EVENT_READ);

        set_non_blocking(afd, 1);

        do {
                errno = 0;
                n = write(afd, &ctx->buf[0], sizeof(ctx->buf));
                if (n == -1) {
                        assert(errno == EAGAIN);
                }
        } while (n > 0);

        FD_ZERO(&set);
        FD_SET(afd, &set);

        rv = select(nfds, NULL, &set, NULL, NULL);
        assert(rv == 1);

        for (i = 0; i < nfds; ++i) {
                bool is_set_expected = i == afd;
                bool is_set = FD_ISSET(i, &set);

                assert(is_set_expected == is_set);
        }

        n = write(afd, &ctx->buf[0], 1);
        assert(n == 1);
}

static void
test_select_close(test_context *ctx)
{
        int cfd = ctx->cfd;
        int nfds = cfd + 1;
        struct fd_set set;
        int rv;

        puts("test select close");

        assert(ctx->cfd >= 0);

        send_events(ctx, EVENT_CLOSE);

        assert(ctx->cfd >= 0);

        FD_ZERO(&set);
        FD_SET(cfd, &set);

        errno = 0;
        rv = select(nfds, NULL, NULL, &set, NULL);
        assert(rv == -1);
        assert(errno == EBADF);

        assert(ctx->cfd == -1);
}

static void
test_pselect_sigmask(void)
{
        int rv;
        sigset_t set;

        puts("test pselect sigmask");

        sigemptyset(&set);
        errno = 0;
        rv = pselect(0, NULL, NULL, NULL, NULL, &set);
        assert(rv == -1);
        assert(errno == ENOSYS);
}

static void
test_pselect_timeout(test_context *ctx)
{
        struct timespec timeout = {
                .tv_sec = 0,
                .tv_nsec = 100000000
        };
        int fd = ctx->lfd;
        int nfds = fd + 1;
        struct fd_set set;
        int rv;
        int i;

        puts("test pselect timeout");

        set_non_blocking(ctx->lfd, 0);

        FD_ZERO(&set);
        FD_SET(fd, &set);

        rv = pselect(nfds, &set, NULL, NULL, &timeout, NULL);
        assert(rv == 0);

        for (i = 0; i < nfds; ++i) {
                assert(!FD_ISSET(i, &set));
        }

        rv = pselect(nfds, NULL, &set, NULL, &timeout, NULL);
        assert(rv == 0);

        for (i = 0; i < nfds; ++i) {
                assert(!FD_ISSET(i, &set));
        }

        rv = pselect(nfds, NULL, NULL, &set, &timeout, NULL);
        assert(rv == 0);

        for (i = 0; i < nfds; ++i) {
                assert(!FD_ISSET(i, &set));
        }
}

static void
test_poll_timeout(test_context *ctx)
{
        static const short events[] = {
                POLLIN,
                POLLPRI,
                POLLOUT,
                POLLRDNORM,
                POLLWRNORM,
                POLLRDBAND,
                POLLWRBAND
        };

        int timeout = 100;
        struct pollfd pfd = {
                .fd = ctx->lfd
        };
        size_t i;

        puts("test poll timeout");

        for (i = 0; i < nitems(events); ++i) {
                int rv;

                pfd.events = events[i];
                pfd.revents = 0;

                rv = poll(&pfd, 1, timeout);
                assert(rv == 0);
        }
}

static void
test_poll_connect(test_context *ctx)
{
        int lfd = ctx->lfd;
        int afd = ctx->afd;
        struct pollfd pfd = {
                .fd = lfd,
                .events = POLLIN
        };
        int timeout = -1;
        int rv;

        puts("test poll connect");

        if (afd >= 0) {
                ctx->afd = -1;

                rv = close(afd);
                assert(rv == 0);
        }

        send_events(ctx, EVENT_CONNECT);

        set_non_blocking(lfd, 1);

        errno = 0;
        afd = accept(lfd, NULL, NULL);
        assert(afd == -1);
        assert(errno == EAGAIN);

        set_non_blocking(lfd, 0);

        rv = poll(&pfd, 1, timeout);
        assert(rv == 1);
        assert(pfd.revents == POLLIN);

        afd = accept(lfd, NULL, NULL);
        assert(afd >= 0);

        ctx->afd = afd;
}

static void
test_poll_read(test_context *ctx)
{
        int afd = ctx->afd;
        int cfd = ctx->cfd;
        struct pollfd pfd = {
                .fd = afd,
                .events = POLLIN
        };
        int timeout = -1;
        int rv;
        ssize_t n;

        puts("test poll read");

        assert(afd >= 0);
        assert(cfd >= 0);

        ctx->wfd = cfd;
        ctx->wbuf = &msg[0];
        ctx->wn = sizeof(msg);
        send_events(ctx, EVENT_WRITE);

        set_non_blocking(afd, 1);

        errno = 0;
        n = read(afd, &ctx->buf[0], sizeof(ctx->buf));
        assert(n == -1);
        assert(errno == EAGAIN);

        rv = poll(&pfd, 1, timeout);
        assert(rv == 1);
        assert(pfd.revents == POLLIN);

        n = read(afd, &ctx->buf[0], sizeof(ctx->buf));
        assert(n == (ssize_t) sizeof(msg));
        assert(memcmp(&msg[0], &ctx->buf[0], sizeof(msg)) == 0);
}

static void
test_poll_write(test_context *ctx)
{
        int afd = ctx->afd;
        int cfd = ctx->cfd;
        struct pollfd pfd = {
                .fd = afd,
                .events = POLLOUT
        };
        int timeout = -1;
        int rv;
        ssize_t n;

        puts("test poll write");

        assert(afd >= 0);
        assert(cfd >= 0);

        ctx->rfd = cfd;
        ctx->rbuf = &ctx->buf[0];
        ctx->rn = sizeof(ctx->buf);
        send_events(ctx, EVENT_READ);

        set_non_blocking(afd, 1);

        do {
                errno = 0;
                n = write(afd, &ctx->buf[0], sizeof(ctx->buf));
                if (n == -1) {
                        assert(errno == EAGAIN);
                }
        } while (n > 0);

        rv = poll(&pfd, 1, timeout);
        assert(rv == 1);
        assert(pfd.revents == POLLOUT);

        n = write(afd, &ctx->buf[0], 1);
        assert(n == 1);
}

static void
test_poll_close(test_context *ctx)
{
        int cfd = ctx->cfd;
        struct pollfd pfd = {
                .fd = cfd,
                .events = POLLRDBAND
        };
        int timeout = -1;
        int rv;

        puts("test poll close");

        assert(ctx->cfd >= 0);

        send_events(ctx, EVENT_CLOSE);

        assert(ctx->cfd >= 0);

        rv = poll(&pfd, 1, timeout);
        assert(rv == 1);
        assert(pfd.revents == POLLNVAL);

        assert(ctx->cfd == -1);
}

static void
test_kqueue_timer(bool do_resource_check)
{
        rtems_resource_snapshot snapshot;
        int kq;
        int rv;
        struct kevent change;
        int i;

        puts("test kqueue timer");

        if (do_resource_check) {
                rtems_resource_snapshot_take(&snapshot);
        }

        kq = kqueue();
        assert(kq >= 0);

        EV_SET(&change, 0xbeef, EVFILT_TIMER, EV_ADD | EV_ENABLE, 0, 100,
            TEST_UDATA);

        rv = kevent(kq, &change, 1, NULL, 0, NULL);
        assert(rv == 0);

        for (i = 0; i < 5; ++i) {
                struct kevent event;

                rv = kevent(kq, NULL, 0, &event, 1, NULL);
                assert(rv == 1);
                assert(event.ident == 0xbeef);
                assert(event.filter == EVFILT_TIMER);
                assert(event.flags == EV_CLEAR);
                assert(event.fflags == 0);
                assert(event.data == 1);
                assert(event.udata == TEST_UDATA);
        }

        rv = close(kq);
        assert(rv == 0);

        if (do_resource_check) {
                assert(rtems_resource_snapshot_check(&snapshot));
        }
}

static void
test_kqueue_connect(test_context *ctx)
{
        int lfd = ctx->lfd;
        int afd = ctx->afd;
        int kq;
        struct kevent change;
        struct kevent event;
        const struct timespec *timeout = NULL;
        int rv;

        puts("test kqueue connect");

        if (afd >= 0) {
                ctx->afd = -1;

                rv = close(afd);
                assert(rv == 0);
        }

        kq = kqueue();
        assert(kq >= 0);

        EV_SET(&change, lfd, EVFILT_READ, EV_ADD | EV_ENABLE, 0, 0,
            TEST_UDATA);

        rv = kevent(kq, &change, 1, NULL, 0, timeout);
        assert(rv == 0);

        send_events(ctx, EVENT_CONNECT);

        set_non_blocking(lfd, 1);

        errno = 0;
        afd = accept(lfd, NULL, NULL);
        assert(afd == -1);
        assert(errno == EAGAIN);

        set_non_blocking(lfd, 0);

        rv = kevent(kq, NULL, 0, &event, 1, timeout);
        assert(rv == 1);
        assert(event.ident == lfd);
        assert(event.filter == EVFILT_READ);
        assert(event.flags == 0);
        assert(event.fflags == 0);
        assert(event.data == 1);
        assert(event.udata == TEST_UDATA);

        afd = accept(lfd, NULL, NULL);
        assert(afd >= 0);

        ctx->afd = afd;

        rv = close(kq);
        assert(rv == 0);
}

static void
test_kqueue_read(test_context *ctx)
{
        int afd = ctx->afd;
        int cfd = ctx->cfd;
        int kq;
        struct kevent change;
        struct kevent event;
        const struct timespec *timeout = NULL;
        int rv;
        ssize_t n;

        puts("test kqueue read");

        assert(afd >= 0);
        assert(cfd >= 0);

        kq = kqueue();
        assert(kq >= 0);

        EV_SET(&change, afd, EVFILT_READ, EV_ADD | EV_ENABLE, 0, 0,
            TEST_UDATA);

        rv = kevent(kq, &change, 1, NULL, 0, timeout);
        assert(rv == 0);

        ctx->wfd = cfd;
        ctx->wbuf = &msg[0];
        ctx->wn = sizeof(msg);
        send_events(ctx, EVENT_WRITE);

        set_non_blocking(afd, 1);

        errno = 0;
        n = read(afd, &ctx->buf[0], sizeof(ctx->buf));
        assert(n == -1);
        assert(errno == EAGAIN);

        rv = kevent(kq, NULL, 0, &event, 1, timeout);
        assert(rv == 1);
        assert(event.ident == afd);
        assert(event.filter == EVFILT_READ);
        assert(event.flags == 0);
        assert(event.fflags == 0);
        assert(event.data == sizeof(msg));
        assert(event.udata == TEST_UDATA);

        n = read(afd, &ctx->buf[0], sizeof(ctx->buf));
        assert(n == (ssize_t) sizeof(msg));
        assert(memcmp(&msg[0], &ctx->buf[0], sizeof(msg)) == 0);

        rv = close(kq);
        assert(rv == 0);
}

static void
test_kqueue_write(test_context *ctx)
{
        int afd = ctx->afd;
        int cfd = ctx->cfd;
        int kq;
        struct kevent change;
        struct kevent event;
        const struct timespec *timeout = NULL;
        int rv;
        ssize_t n;

        puts("test kqueue write");

        assert(afd >= 0);
        assert(cfd >= 0);

        kq = kqueue();
        assert(kq >= 0);

        EV_SET(&change, afd, EVFILT_WRITE, EV_ADD | EV_ENABLE, 0, 0,
            TEST_UDATA);

        rv = kevent(kq, &change, 1, NULL, 0, timeout);
        assert(rv == 0);

        ctx->rfd = cfd;
        ctx->rbuf = &ctx->buf[0];
        ctx->rn = sizeof(ctx->buf);
        send_events(ctx, EVENT_READ);

        set_non_blocking(afd, 1);

        do {
                errno = 0;
                n = write(afd, &ctx->buf[0], sizeof(ctx->buf));
                if (n == -1) {
                        assert(errno == EAGAIN);
                }
        } while (n > 0);

        rv = kevent(kq, NULL, 0, &event, 1, timeout);
        assert(rv == 1);
        assert(event.ident == afd);
        assert(event.filter == EVFILT_WRITE);
        assert(event.flags == 0);
        assert(event.fflags == 0);
        assert(event.data == 20428);
        assert(event.udata == TEST_UDATA);

        n = write(afd, &ctx->buf[0], 1);
        assert(n == 1);

        rv = close(kq);
        assert(rv == 0);
}

static void
test_kqueue_close(test_context *ctx)
{
        int cfd = ctx->cfd;
        int kq;
        struct kevent change;
        struct kevent event;
        const struct timespec *timeout = NULL;
        int rv;
        ssize_t n;
        mode_t canrecv = S_IRUSR | S_IRGRP | S_IROTH;
        mode_t cansend = S_IWUSR | S_IWGRP | S_IWOTH;
        struct stat st;

        puts("test kqueue close");

        assert(ctx->cfd >= 0);

        kq = kqueue();
        assert(kq >= 0);

        EV_SET(&change, cfd, EVFILT_READ, EV_ADD | EV_ENABLE, 0, 0,
            TEST_UDATA);

        rv = kevent(kq, &change, 1, NULL, 0, timeout);
        assert(rv == 0);

        set_non_blocking(cfd, 1);

        do {
                errno = 0;
                n = read(cfd, &ctx->buf[0], sizeof(ctx->buf));
                if (n == -1) {
                        assert(errno == EAGAIN);
                }
        } while (n > 0);

        /*
         * It is not allowed to close file descriptors still in use by
         * kevent().  On FreeBSD the file descriptor reference counting would
         * prevent this also.
         */
        send_events(ctx, EVENT_SHUTDOWN);

        rv = fstat(cfd, &st);
        assert(rv == 0);
        assert(st.st_mode == (S_IFSOCK | canrecv | cansend));

        rv = kevent(kq, NULL, 0, &event, 1, timeout);
        assert(rv == 1);
        assert(event.ident == cfd);
        assert(event.filter == EVFILT_READ);
        assert(event.flags == EV_EOF);
        assert(event.fflags == 0);
        assert(event.data == 0);
        assert(event.udata == TEST_UDATA);

        /*
         * The master task wakes up during the shutdown() operation.  So we do
         * not see the full shutdown.
         */
        rv = fstat(cfd, &st);
        assert(rv == 0);
        assert(st.st_mode == (S_IFSOCK | cansend));

        rv = close(kq);
        assert(rv == 0);
}

static void
test_kqueue_user(test_context *ctx)
{
        int kq;
        uintptr_t ident;
        u_int flag;
        struct kevent change;
        struct kevent trigger;
        struct kevent event;
        const struct timespec *timeout = NULL;
        int rv;

        puts("test kqueue user");

        ident = 0xabc;
        flag = 0x1;

        kq = kqueue();
        assert(kq >= 0);

        EV_SET(&change, ident, EVFILT_USER, EV_ADD | EV_ENABLE, NOTE_FFNOP, 0,
            TEST_UDATA);

        rv = kevent(kq, &change, 1, NULL, 0, timeout);
        assert(rv == 0);

        ident = 0xabc;
        EV_SET(&trigger, ident, EVFILT_USER, 0, NOTE_TRIGGER | NOTE_FFCOPY |
            flag, 0, TEST_UDATA);

        rv = kevent(kq, &trigger, 1, NULL, 0, timeout);
        assert(rv == 0);

        memset(&event, 0, sizeof(event));
        rv = kevent(kq, NULL, 0, &event, 1, timeout);
        assert(rv == 1);
        assert(event.ident == ident);
        assert(event.filter == EVFILT_USER);
        assert(event.flags == 0);
        assert(event.fflags == flag);
        assert(event.data == 0);
        assert(event.udata == TEST_UDATA);

        rv = close(kq);
        assert(rv == 0);
}

static void
test_main(void)
{
        test_context *ctx = &test_instance;

        setup_lo0();
        set_self_prio(PRIO_MASTER);
        start_worker(ctx);
        create_server_socket(ctx);
        create_client_addr(ctx);

        test_select_timeout(ctx);
        test_select_connect(ctx);
        test_select_read(ctx);
        test_select_write(ctx);
        test_select_close(ctx);

        test_pselect_sigmask();
        test_pselect_timeout(ctx);

        test_poll_timeout(ctx);
        test_poll_connect(ctx);
        test_poll_read(ctx);
        test_poll_write(ctx);
        test_poll_close(ctx);

        test_kqueue_timer(false);
        test_kqueue_timer(true);
        test_kqueue_connect(ctx);
        test_kqueue_read(ctx);
        test_kqueue_write(ctx);
        test_kqueue_close(ctx);
        test_kqueue_user(ctx);

        exit(0);
}

#include <rtems/bsd/test/default-init.h>