/*      $OpenBSD: kqueue-fork.c,v 1.3 2016/09/20 23:05:27 bluhm Exp $   */
/*
 *      Written by Artur Grabowski <art@openbsd.org> 2002 Public Domain
 */

#include <sys/types.h>
#include <sys/event.h>
#include <sys/wait.h>

#include <err.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>

#include "main.h"

int
check_inheritance(void)
{
        int kq, status;

        ASS((kq = kqueue()) >= 0,
            warn("kqueue"));

        /*
         * Check if the kqueue is properly closed on fork().
         */

        switch (fork()) {
        case -1:
                err(1, "fork");
        case 0:
                if (close(kq) < 0)
                        _exit(0);
                warnx("fork didn't close kqueue");
                _exit(1);
        }
        if (wait(&status) < 0)
                err(1, "wait");

        if (!WIFEXITED(status))
                errx(1, "child didn't exit?");

        close(kq);
        return (WEXITSTATUS(status) != 0);
}