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scoutos / prex-0.9.0 / usr / test / pipe / pipe.c @ 03e9c04a

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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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 * pipe.c - test unix pipe
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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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static void
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test1(void)
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{
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        int fd[2];
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        char str[] = "test1";
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        char buf[256];
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        printf("pipe test program\n");
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        if (pipe(fd) == -1) {
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                perror("pipe");
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                exit(1);
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        }
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        write(fd[1], str, sizeof(str));
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        read(fd[0], buf, sizeof(buf));
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        printf("str=%s\n", buf);
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}
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static void
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test2(void)
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{
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        int fd[2];
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        char str[] = "test2: hello!";
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        char buf[256];
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        printf("pipe test program\n");
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        if (pipe(fd) == -1) {
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                perror("pipe");
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                exit(1);
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        }
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        switch(vfork()) {
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        case -1:
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                perror("fork");
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                break;
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        case 0: /* child */
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                close(fd[1]);
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                read(fd[0], buf, 256);
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                close(fd[0]);
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                printf("str=%s\n", buf);
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                exit(0);
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                break;
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        default: /* parent */
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                close(fd[0]);
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                write(fd[1], str, sizeof(str));
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                close(fd[1]);
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                exit(0);
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                break;
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        }
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}
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int
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main(int argc, char *argv[])
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{
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        test1();
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        test2();
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        return 0;
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}