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/*
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 * Copyright (c) 2008, Kohsuke Ohtani
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 * All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 * 1. Redistributions of source code must retain the above copyright
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 *    notice, this list of conditions and the following disclaimer.
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 * 2. Redistributions in binary form must reproduce the above copyright
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 *    notice, this list of conditions and the following disclaimer in the
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 *    documentation and/or other materials provided with the distribution.
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 * 3. Neither the name of the author nor the names of any co-contributors
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 *    may be used to endorse or promote products derived from this software
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 *    without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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 * SUCH DAMAGE.
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 */
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/*
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 * fifo.c - test FIFO function
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 */
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#include <sys/prex.h>
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#include <sys/fcntl.h>
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#include <sys/stat.h>
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#include <sys/errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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int
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main(int argc, char *argv[])
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{
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        int pid, fd1, fd2, len;
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        char buf1[256], buf2[256];
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        printf("FIFO test program\n");
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        if (mknod("/mnt/fifo/test", (mode_t)(S_IFIFO | 0666), 0) == -1) {
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                perror("mkfifo");
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                exit(1);
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        }
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        pid = vfork();
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        if (pid == -1) {
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                perror("fork");
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                exit(1);
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        }
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        if (pid == 0) {
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                /* child */
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                printf("child: task=%x\n", (int)task_self());
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                fd1 = open("/mnt/fifo/test", O_RDONLY);
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                if (fd1 == -1) {
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                        perror("open");
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                        exit(1);
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                }
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                for (;;) {
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                        printf("child: reading data from FIFO\n");
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                        len = read(fd1, buf1, sizeof(buf1) - 1);
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                        if (len == 0)
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                                break;
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                        buf1[len] = '\0';
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                        printf("child: length=%d data=%s\n", len, buf1);
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                }
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                close(fd1);
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                printf("child: exit\n");
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                exit(0);
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        }
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        printf("parent: task=%x\n", (int)task_self());
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        fd2 = open("/mnt/fifo/test", O_WRONLY);
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        if (fd2 == -1) {
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                perror("open");
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                exit(1);
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        }
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        for (;;) {
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                printf("parent: please input string...\n");
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                fgets(buf2, sizeof(buf2) - 1, stdin);
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                if (feof(stdin))
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                        break;
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                printf("parent: writing to FIFO\n");
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                write(fd2, buf2, strlen(buf2));
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        }
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        close(fd2);
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        printf("parent: exit\n");
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        exit(0);
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        return 0;
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}