nn                 65 kernel/console.c     int nn = sizeof(buf);
nn                 66 kernel/console.c     if(nn > n - i)
nn                 67 kernel/console.c       nn = n - i;
nn                 68 kernel/console.c     if(either_copyin(buf, user_src, src+i, nn) == -1)
nn                 70 kernel/console.c     uartwrite(buf, nn);
nn                 71 kernel/console.c     i += nn;