print "Saving grade report to tests.out...\n";
xsystem ("cp pintos/src/$project/build/grade tests.out",
DIE => "copy failed");
+ xsystem ("(cd pintos/src/$project/build && find tests -name '*.output' "
+ . " | xargs grep '^hd[01]:[01]: [0-9]') > hdd.stats");
}
if (do_step (7)) {