gistfile1.txt

 void RunCmdPipe(commandT* cmd1, commandT* cmd2)
 {
  pid_t child;
  int status = -1;
  int pipe_status = -1;
  int pid = 0;

  fprintf (stdout,"executing %s () %s \n", cmd1->name, cmd2->argv[0]);
  if ((child = fork()) > 0) // the shell parent process
  {
    fgJobPid = child;
    fprintf (stdout,"waiting in super parent \n");

    do
    {
      pid = waitpid(child, &status, 0);
    } while (pid > 0);
    status = WEXITSTATUS(status);
    fprintf (stdout,"done in super parent \n");
    // RunCmd(cmd2);
    fflush(stdout);
  }
  else if (child == 0) // the pipe (parent)child process
  {

    // set the group id to the pid so it can be killed properly
    if (setpgid(0, 0) != 0)
      PrintPError("Error setting child gid\n");
    // if the command could not be resolved, argc is set to 0
    pid_t pipes_child;
    fprintf (stdout,"setting pipe \n");

    int fd[2];
    pipe(fd);

    if ((pipes_child = fork()) > 0){
      // the pipe parent

      // close(fd[1]); //close read from pipe, in parent
      // dup2(fd[0], STDIN_FILENO); // Replace stdout with the write end of the pipe
      // close(fd[0]);
      fprintf (stdout,"waiting %s in pipe parent\n", cmd2->argv[0]);

       // do
       // {
          // fprintf (stdout,"waiting %s in pipe parent...\n", cmd2->argv[0]);
      pid = waitpid(pipes_child, &pipe_status, 0);
       // } while (pid > 0);

      pipe_status = WEXITSTATUS(pipe_status);
      fprintf (stdout,"executing %s in pipe parent\n", cmd2->argv[0]);
      // char readbuffer[80];
      // int nbytes = read(fd[0], readbuffer, sizeof(readbuffer));
      // printf("%i\n", nbytes);
      // printf("%s\n", readbuffer);
      fprintf (stdout,"exiting parent\n");
      exit(pipe_status);
    }
    else if (pipes_child == 0) //  the pipes child process
    {
      fprintf (stdout,"executing %s in pipe child: %i \n", cmd1->argv[0], cmd1->argc);
      // close(fd[0]);
      // dup2(fd[1], STDOUT_FILENO);
      // close(fd[1]);
      if(cmd1->argc > 0)
      {
        fprintf (stdout,"exec in child %s %s\n", cmd1->argv[0], cmd1->argv[1], cmd1->argv[2]);
        pipe_status = execv(cmd1->argv[0], cmd1->argv);
      }
      else if (cmd1->argc == 0)
      {
        printf("./tsh-ref: line 1: %s: No such file or directory\n", cmd1->name);
      }
      fprintf (stdout,"exiting\n");
      exit(pipe_status);
    }
  }
} /* RunCmdPipe */