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/* vi: set sw=4 ts=4: */

/*

 * fork test for uClibc

 *

 * Copyright (C) 2000 by Lineo, inc. and Erik Andersen

 * Copyright (C) 2000,2001 by Erik Andersen <andersen@uclibc.org>

 * Written by Erik Andersen <andersen@uclibc.org>

 *

 * This program is free software; you can redistribute it and/or modify it

 * under the terms of the GNU Library General Public License as published by

 * the Free Software Foundation; either version 2 of the License, or (at your

 * option) any later version.

 *

 * This program is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public License

 * for more details.

 *

 * You should have received a copy of the GNU Library General Public License

 * along with this program; if not, write to the Free Software Foundation,

 * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA

 *

 */

#include <stdio.h>

#include <stdlib.h>

#include <unistd.h>

#include <signal.h>

#include <sys/wait.h>

#define GOT1    (1 << 1)

#define GOT2    (1 << 2)

#define GOT3    (1 << 3)

void child_handler(int sig)

{

        fprintf(stderr, "I got a SIGCHLD\n");

}

int main(void)

{

        pid_t pid1, pid2, pid3;

        int status, result, wpid;

        signal(SIGCHLD, child_handler);

        if ((pid1 = fork()) == 0) {

                fprintf(stderr, "The child process sleeps 2 seconds...\n");

                sleep(4);

                fprintf(stderr, "Child exiting.\n");

                exit(-1);

        }

        if ((pid2 = fork()) == 0) {

                fprintf(stderr, "The child process sleeps 3 seconds...\n");

                sleep(3);

                fprintf(stderr, "Child exiting.\n");

                exit(-1);

        }

        if ((pid3 = fork()) == 0) {

                fprintf(stderr, "The child process sleeps 4 seconds...\n");

                sleep(2);

                fprintf(stderr, "Child exiting.\n");

                exit(-1);

        }

        fprintf(stderr, "Parent: waiting for the child to die.\n");

        status = 0;

        while (1) {

                wpid = waitpid(pid1, &result, WNOHANG);

                if (wpid == pid1)

                        status |= GOT1;

                wpid = waitpid(pid2, &result, WNOHANG);

                if (wpid == pid2)

                        status |= GOT2;

                wpid = waitpid(pid3, &result, WNOHANG);

                if (wpid == pid3)

                        status |= GOT3;

                if (status == (GOT1 | GOT2 | GOT3))

                        break;

        }

        fprintf(stderr, "Child process exited.\nGoodbye.\n");

        return EXIT_SUCCESS;

}

/*

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*/