minix/test/test13.c

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/* test 13 */
/* File: pipes.c - created by Marty Leisner */
/* Leisner.Henr 1-Dec-87 8:55:04 */
/* Copyright (C) 1987 by Martin Leisner. All rights reserved. */
/* Used by permission. */
#include <sys/types.h>
#include <sys/wait.h>
#include <stdlib.h>
#include <unistd.h>
#include <stdio.h>
#define BLOCK_SIZE 1000
#define NUM_BLOCKS 1000
char buffer[BLOCK_SIZE];
#define MAX_ERROR 2
#include "common.c"
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_PROTOTYPE(int main, (void));
_PROTOTYPE(void quit, (void));
int main()
{
int stat_loc, pipefd[2];
register int i;
start(13);
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pipe(pipefd);
switch (fork()) {
case 0:
/* Child code */
for (i = 0; i < NUM_BLOCKS; i++)
if (read(pipefd[0], buffer, BLOCK_SIZE) != BLOCK_SIZE) break;
exit(0);
case -1:
perror("fork broke");
exit(1);
default:
/* Parent code */
for (i = 0; i < NUM_BLOCKS; i++) write(pipefd[1], buffer, BLOCK_SIZE);
wait(&stat_loc);
break;
}
quit();
return(-1); /* impossible */
}