src/process3.c

   1 #include <stdio.h>
   2
   3 /* open/read/write/close */
   4 #include <fcntl.h>
   5
   6 /**
   7  * Program grabs data (calculated number of characters) from process2 and prints
   8  * grabbed data to the standard output.
   9  */
  10 int main(void) {
  11         /** Named pipe used to communicate with process2 */
  12         char * read_pipe = "/tmp/process2pipe";
  13
  14         int read_descriptor;
  15
  16         int buffer = 0;
  17
  18         int i = 0;
  19         ssize_t count = 0;
  20
  21         /* Reading from process2 */
  22         read_descriptor = open(read_pipe, O_RDONLY);
  23
  24         int number_of_characters = 0;
  25
  26         while(1) {
  27                 /* Read data from input pipe */
  28                 count = read(read_descriptor, &buffer, sizeof(int));
  29
  30                 fprintf(stderr, "[%s] Fetched: %d bytes\n", "process3", count);
  31
  32                 if (count > 0) {
  33                         fprintf(stderr, "[%s] Process2 send: %d\n", "process3", buffer);
  34                 }
  35                 else {
  36                         break;
  37                 }
  38         }
  39
  40         close(read_descriptor);
  41
  42         return 0;
  43 }