//gg.c -- by tsaiwn@csie.nctu.edu.tw
// gcc gg.c
// a.exe
// a.exe > aa.txt
int main( ) {
   char buf[999];
   write(1, "ha ha ha ...", 12);
   write(2, "passwd:    ", 8);
   read(0, buf, 10);
   write(1, "you say .......", 10);
   write(1, buf, 20);
   return 0;
}