[LTP] gethostname02: Accept EOVERFLOW on alpha

[linuxtestproject.agent@gmail.com]

Hi panzhe,

On Tue, 02 Jun 2026 12:17:38 +0800, panzhe <panzhe@kylinos.cn> wrote:
> gethostname02: Accept EOVERFLOW on alpha

> +	const int exp_errnos[] = {ENAMETOOLONG, EOVERFLOW};
>
>  	SAFE_GETHOSTNAME(hostname, sizeof(hostname));
>  	real_length = strlen(hostname);
>
> -	TST_EXP_FAIL(gethostname(hostname, real_length - 1), ENAMETOOLONG,
> +	TST_EXP_FAIL2_ARR(gethostname(hostname, real_length - 1),
> +		exp_errnos, ARRAY_SIZE(exp_errnos),
>  		"len is smaller than the actual size");

`gethostname()` returns 0 on success and -1 on error, so this should use
`TST_EXP_FAIL_ARR` rather than `TST_EXP_FAIL2_ARR`. The `TST_EXP_FAIL2`
family is for syscalls that return a positive value on success (e.g.
`open`, `fork`). The original `TST_EXP_FAIL` call already used the
correct family; the array variant should follow suit:

    TST_EXP_FAIL_ARR(gethostname(hostname, real_length - 1),
        exp_errnos, ARRAY_SIZE(exp_errnos),
        "len is smaller than the actual size");

Needs revision.

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