aa                225 user/grind.c         int aa[2], bb[2];
aa                226 user/grind.c         if(pipe(aa) < 0){
aa                238 user/grind.c           close(aa[0]);
aa                240 user/grind.c           if(dup(aa[1]) != 1){
aa                244 user/grind.c           close(aa[1]);
aa                255 user/grind.c           close(aa[1]);
aa                258 user/grind.c           if(dup(aa[0]) != 0){
aa                262 user/grind.c           close(aa[0]);
aa                277 user/grind.c         close(aa[0]);
aa                278 user/grind.c         close(aa[1]);