/*      $OpenBSD: t_getpid.c,v 1.2 2021/12/13 16:56:48 deraadt Exp $    */
/* $NetBSD: t_getpid.c,v 1.1 2011/07/07 06:57:53 jruoho Exp $ */

/*-
 * Copyright (c) 2011 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Jukka Ruohonen.
 *
 * 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 "macros.h"

#include <sys/wait.h>

#include <stdlib.h>
#include <pthread.h>
#include <unistd.h>

#include "atf-c.h"

static int       maxiter = 10;
static void     *threadfunc(void *);

static void *
threadfunc(void *arg)
{
        *(pid_t *)arg = getpid();

        return NULL;
}

ATF_TC(getpid_process);
ATF_TC_HEAD(getpid_process, tc)
{
        atf_tc_set_md_var(tc, "descr", "Test getpid(2) with processes");
}

ATF_TC_BODY(getpid_process, tc)
{
        pid_t ppid, fpid, cpid, tpid, wpid;
        int i, sta;

        for (i = 0; i < maxiter; i++) {

                tpid = getpid();
                fpid = fork();

                ATF_REQUIRE(fpid >= 0);

                if (fpid == 0) {

                        cpid = getpid();
                        ppid = getppid();

                        if (tpid != ppid)
                                _exit(EXIT_FAILURE);

                        if (cpid == ppid)
                                _exit(EXIT_FAILURE);

                        if (tpid == fpid)
                                _exit(EXIT_FAILURE);

                        _exit(EXIT_SUCCESS);
                }

                wpid = wait(&sta);

                if (wpid != fpid)
                        atf_tc_fail("PID mismatch");

                ATF_REQUIRE(WIFEXITED(sta) != 0);

                if (WEXITSTATUS(sta) != EXIT_SUCCESS)
                        atf_tc_fail("PID mismatch");
        }
}

ATF_TC(getpid_thread);
ATF_TC_HEAD(getpid_thread, tc)
{
        atf_tc_set_md_var(tc, "descr", "Test getpid(2) with threads");
}

ATF_TC_BODY(getpid_thread, tc)
{
        pid_t pid, tpid;
        pthread_t tid;
        int i, rv;

        for (i = 0; i < maxiter; i++) {

                pid = getpid();

                rv = pthread_create(&tid, NULL, threadfunc, &tpid);
                ATF_REQUIRE(rv == 0);

                rv = pthread_join(tid, NULL);
                ATF_REQUIRE(rv == 0);

                if (pid != tpid)
                        atf_tc_fail("Unequal PIDs");
        }
}

ATF_TP_ADD_TCS(tp)
{

        ATF_TP_ADD_TC(tp, getpid_process);
        ATF_TP_ADD_TC(tp, getpid_thread);

        return atf_no_error();
}