test/test13.c

   1 /* test 13 */
   2
   3 /* File: pipes.c - created by Marty Leisner */
   4 /* Leisner.Henr         1-Dec-87  8:55:04 */
   5
   6 /* Copyright (C) 1987 by Martin Leisner. All rights reserved. */
   7 /* Used by permission. */
   8
   9 #include <sys/types.h>
  10 #include <sys/wait.h>
  11 #include <stdlib.h>
  12 #include <unistd.h>
  13 #include <stdio.h>
  14
  15 #define BLOCK_SIZE      1000
  16 #define NUM_BLOCKS      1000
  17
  18 char buffer[BLOCK_SIZE];
  19
  20 #define MAX_ERROR 2
  21 #include "common.c"
  22
  23 int main(void);
  24 void quit(void);
  25
  26 int main()
  27 {
  28   int stat_loc, pipefd[2];
  29   register int i;
  30
  31   start(13);
  32
  33   pipe(pipefd);
  34
  35   switch (fork()) {
  36       case 0:
  37         /* Child code */
  38         for (i = 0; i < NUM_BLOCKS; i++)
  39                  if (read(pipefd[0], buffer, BLOCK_SIZE) != BLOCK_SIZE) break;
  40         exit(0);
  41
  42       case -1:
  43         perror("fork broke");
  44         exit(1);
  45
  46       default:
  47         /* Parent code */
  48         for (i = 0; i < NUM_BLOCKS; i++) write(pipefd[1], buffer, BLOCK_SIZE);
  49         wait(&stat_loc);
  50         break;
  51   }
  52   quit();
  53   return(-1);                   /* impossible */
  54 }
  55