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/*

 * Copyright (c) 2008, Kohsuke Ohtani

 * 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.

 * 3. Neither the name of the author nor the names of any co-contributors

 *    may be used to endorse or promote products derived from this software

 *    without specific prior written permission.

 *

 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.

 */

/*

 * pipe.c - test unix pipe

 */

#include <sys/prex.h>

#include <sys/fcntl.h>

#include <sys/stat.h>

#include <sys/errno.h>

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include <unistd.h>

static void

test1(void)

{

        int fd[2];

        char str[] = "test1";

        char buf[256];

        printf("pipe test program\n");

        if (pipe(fd) == -1) {

                perror("pipe");

                exit(1);

        }

        write(fd[1], str, sizeof(str));

        read(fd[0], buf, sizeof(buf));

        printf("str=%s\n", buf);

}

static void

test2(void)

{

        int fd[2];

        char str[] = "test2: hello!";

        char buf[256];

        printf("pipe test program\n");

        if (pipe(fd) == -1) {

                perror("pipe");

                exit(1);

        }

        switch(vfork()) {

        case -1:

                perror("fork");

                break;

        case 0: /* child */

                close(fd[1]);

                read(fd[0], buf, 256);

                close(fd[0]);

                printf("str=%s\n", buf);

                exit(0);

                break;

        default: /* parent */

                close(fd[0]);

                write(fd[1], str, sizeof(str));

                close(fd[1]);

                exit(0);

                break;

        }

}

int

main(int argc, char *argv[])

{

        test1();

        test2();

        return 0;

}