text: #include <unistd.h>
  #include <stdlib.h>
  #include <stdio.h>
  #include <string.h>
  
  int main()
  {
      int data_processed;
      int file_pipes[2];
      const char some_data[] = "123";
      char buffer[BUFSIZ + 1];
  
      memset(buffer, '\0', sizeof(buffer));
  
      if (pipe(file_pipes) == 0) {
          data_processed = write(file_pipes[1], some_data, strlen(some_data));
          printf("Wrote %d bytes\n", data_processed);
          data_processed = read(file_pipes[0], buffer, BUFSIZ);
          printf("Read %d bytes: %s\n", data_processed, buffer);
          exit(EXIT_SUCCESS);
      }
      exit(EXIT_FAILURE);
  }
  