[LTP] [PATCH] Convert dup02 to new API and clean up

[Petr Vorel <pvorel@suse.cz>]

Hi Radoslav,

>  testcases/kernel/syscalls/dup/dup02.c | 212 ++++++--------------------
...

> +	struct tcase *testcase = &testcases[n];
Maybe shorter names (tc)?

> +
> +	TEST(dup(testcase->fd));
> +
> +	if (TST_RET < -1) {
> +		tst_res(TFAIL, "Invalid dup() return value %ld", TST_RET);
I'd use here also TERRNO (on this unexpected error.

> +	} else if (TST_RET == -1) {
> +		if (TST_ERR == testcase->expected_errno) {
		if (testcase->expected_errno ==  TST_ERR) {
(checkpatch.pl script from kernel warning; checkpatch.pl warnings aren't hard
requirements but it's good try to remove them if possible).

> +			tst_res(TPASS | TERRNO, "dup(%d) failed as expected",
> +				testcase->fd);
> +		} else {
> +			tst_res(TFAIL | TERRNO, "dup(%d) Failed unexpectedly",
> +				testcase->fd);
>  		}
> +	} else {
> +		tst_res(TFAIL, "dup(%d) Succeeded unexpectedly", testcase->fd);
> +		SAFE_CLOSE(TST_RET);
>  	}

Nested if/else blocks are hard to read. We're trying to reduce them with return:
(not hard requirement, but really more readable)

	if (TST_RET < -1) {
		tst_res(TFAIL | TTERRNO, "Invalid dup() return value %ld", TST_RET);
		return;
	}

	if (TST_RET == -1) {
		if (testcase->expected_errno ==  TST_ERR) {
			tst_res(TPASS | TERRNO, "dup(%d) failed as expected",
				testcase->fd);
		} else {
			tst_res(TFAIL | TERRNO, "dup(%d) Failed unexpectedly",
				testcase->fd);
		}

		return;
	}

	tst_res(TFAIL, "dup(%d) Succeeded unexpectedly", testcase->fd);
	SAFE_CLOSE(TST_RET);

Otherwise LGTM :).

Kind regards,
Petr