nn                 69 kernel/console.c     int nn = sizeof(buf);
nn                 70 kernel/console.c     if (nn > n - i)
nn                 71 kernel/console.c       nn = n - i;
nn                 72 kernel/console.c     if (either_copyin(buf, user_src, src + i, nn) == -1)
nn                 74 kernel/console.c     uartwrite(buf, nn);
nn                 75 kernel/console.c     i += nn;