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path: root/Userland/Tests/Kernel/null-deref-close-during-select.cpp
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/*
 * Copyright (c) 2018-2020, the SerenityOS developers.
 * All rights reserved.
 *
 * 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 COPYRIGHT HOLDERS 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 COPYRIGHT HOLDER 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 <pthread.h>
#include <stdio.h>
#include <sys/select.h>
#include <unistd.h>

int pipefds[2];

int main(int, char**)
{
    pipe(pipefds);

    pthread_t tid;
    pthread_create(
        &tid, nullptr, [](void*) -> void* {
            sleep(1);
            printf("ST: close()\n");
            close(pipefds[1]);
            pthread_exit(nullptr);
            return nullptr;
        },
        nullptr);

    fd_set rfds;
    FD_ZERO(&rfds);
    FD_SET(pipefds[1], &rfds);

    printf("MT: select()\n");
    int rc = select(pipefds[1] + 1, &rfds, nullptr, nullptr, nullptr);
    if (rc < 0) {
        perror("select");
        return 1;
    }

    printf("ok\n");
    return 0;
}