Does anyone see a problem with this, its not working saying bad file descriptor not sure why?

pipe(pipefd[0]);
if ((opid = fork()) == 0) {
     dup2(pipefd[0][1],1);/*send to output*/
     close(pipefd[0][0]);
     close(pipefd[0][1]);
     execlp("ls","ls","-al",NULL);
}

 if((cpid = fork())==0){
   dup2(pipefd[0][1],0);/*read from input*/
   close(pipefd[0][0]);
   close(pipefd[1][1]);
   execlp("grep","grep",".bak",NULL);
}

  close(pipefd[0][0]);
  close(pipefd[0][1]);