void str_cli(FILE *fp, int sockfd) {
    int maxfdp1, stdineof;
    fd_set rset;
    char buf[MAXLINE];
    int n;

    stdineof = 0; 
    FD_ZERO(&rset);
    for ( ; ; ) {
      if (stdineof == 0) {
          FD_SET(fileno(fp), &rset);
      }
        FD_SET(sockfd, &rset);
      maxfdp1 = max(fileno(fp), sockfd) + 1;
      select(maxfdp1, &rset, NULL, NULL, NULL);

      if (FD_ISSET(sockfd, &rset)) {      /* socket is readable */
          if ( (n = read(sockfd, buf, MAXLINE)) == 0) {
              if (stdineof == 1) {
                return;
            } else {
                  exit(1);
            }
          }
          write(fileno(stdout), buf, n);
      }

      if (FD_ISSET(fileno(fp), &rset)) { /* inout is readable */
          if ( (n = read(fileno(fp), buf, MAXLINE)) == 0) {
              stdineof = 1;
            shutdown(sockfd, SHUT_WR); /* send FIN */
            FD_CLR(fileno(fp), &rset);
            continue;
          }
          writen(sockfd, buf, n);
      }
    }
}