getppid_tm
FAIL_IF(getppid_tm(false, false) != -1); /* Should fail... */
FAIL_IF(getppid_tm(true, true) == -1); /* Should succeed. */
FAIL_IF(getppid_tm(true, false) != -1); /* Should fail... */
FAIL_IF(getppid_tm(false, true) == -1); /* Should succeed. */