text: #include <unistd.h>
  #include <stdlib.h>
  #include <stdio.h>
  #include <string.h>
  #include <fcntl.h>
  #include <limits.h>
  #include <sys/types.h>
  #include <sys/stat.h>
  
  #define FIFO_NAME "/tmp/my_fifo"
  #define BUFFER_SIZE PIPE_BUF
  
  int main()
  {
      int pipe_fd;
      int res;
      int open_mode = O_RDONLY;
      char buffer[BUFFER_SIZE + 1];
      int bytes_read = 0;
  
      memset(buffer, '\0', sizeof(buffer));
      
      printf("Process %d opening FIFO O_RDONLY\n", getpid());
      pipe_fd = open(FIFO_NAME, open_mode);
      printf("Process %d result %d\n", getpid(), pipe_fd);
  
      if (pipe_fd != -1) {
          do {
              res = read(pipe_fd, buffer, BUFFER_SIZE);
              bytes_read += res;
          } while (res > 0);
          (void)close(pipe_fd);
      }
      else {
          exit(EXIT_FAILURE);
      }
  
      printf("Process %d finished, %d bytes read\n", getpid(), bytes_read);
      exit(EXIT_SUCCESS);
  }
  
  