/*      $OpenBSD: earlysig.c,v 1.2 2007/08/01 21:32:53 miod Exp $       */

/*
 * Public domain.  2005, Otto Moerbeek
 *
 * Try to create the case where a signal is delivered to a process before
 * fork() returns.
 */

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

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

void dohup(int signo)
{
}

int
main()
{
        pid_t pid;
        int status;

        signal(SIGHUP, dohup);

        switch(pid = fork()) {
        case -1:
                err(1, "fork");
                break;
        case 0:
                sleep(2);
                exit(0);
        default:
                kill(pid, SIGHUP);
                sleep(1);
                if (waitpid(pid, &status, 0) == -1)
                        err(1, "waitpid");
                if (WIFEXITED(status) && WEXITSTATUS(status) == 0)
                        exit(0);
                else
                        errx(1, "child exited with status %d",
                            WEXITSTATUS(status));
        }
}