bb 225 user/grind.c int aa[2], bb[2]; bb 230 user/grind.c if(pipe(bb) < 0){ bb 236 user/grind.c close(bb[0]); bb 237 user/grind.c close(bb[1]); bb 256 user/grind.c close(bb[0]); bb 264 user/grind.c if(dup(bb[1]) != 1){ bb 268 user/grind.c close(bb[1]); bb 279 user/grind.c close(bb[1]); bb 281 user/grind.c read(bb[0], buf+0, 1); bb 282 user/grind.c read(bb[0], buf+1, 1); bb 283 user/grind.c read(bb[0], buf+2, 1); bb 284 user/grind.c close(bb[0]);