st1               285 user/grind.c         int st1, st2;
st1               286 user/grind.c         wait(&st1);
st1               288 user/grind.c         if(st1 != 0 || st2 != 0 || strcmp(buf, "hi\n") != 0){
st1               289 user/grind.c           printf("grind: exec pipeline failed %d %d \"%s\"\n", st1, st2, buf);
st1               324 user/grind.c     int st1 = -1;
st1               325 user/grind.c     wait(&st1);
st1               326 user/grind.c     if(st1 != 0){