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 int max_error = 2;
  21 #include "common.h"
  22
  23
  24 int main(void);
  25 void quit(void);
  26
  27 int main()
  28 {
  29   int stat_loc, pipefd[2];
  30   register int i;
  31
  32   start(13);
  33
  34   pipe(pipefd);
  35
  36   switch (fork()) {
  37       case 0:
  38         /* Child code */
  39         for (i = 0; i < NUM_BLOCKS; i++)
  40                  if (read(pipefd[0], buffer, BLOCK_SIZE) != BLOCK_SIZE) break;
  41         exit(0);
  42
  43       case -1:
  44         perror("fork broke");
  45         exit(1);
  46
  47       default:
  48         /* Parent code */
  49         for (i = 0; i < NUM_BLOCKS; i++) write(pipefd[1], buffer, BLOCK_SIZE);
  50         wait(&stat_loc);
  51         break;
  52   }
  53   quit();
  54   return(-1);                   /* impossible */
  55 }
  56