hardlink
hardlink(tc, mp, 1, 1, false, true);
hardlink(tc, mp, 1, 1, true, true);
hardlink(tc, mp, 1, 2, false, true);
hardlink(tc, mp, 1, 2, true, false);
hardlink(tc, mp, 1, 0, false, true);
hardlink(tc, mp, 1, 0, true, true);
hardlink(cp);
static void hardlink(char *);