[LTP] [PATCH v4] close02: add test for double close EBADF

[Petr Vorel]

Hi Jinseok,

...
> -static void run(void)
> +static struct tcase {
> +	const char *desc;
> +	int fd;
> +	int exp_errno;
> +} tcases[] = {
> +	{ "close(-1)", -1, EBADF },
> +	{ "close same fd twice", -1, EBADF },
> +};
> +
> +static void verify_close(unsigned int i)
> +{
> +	struct tcase *tc = &tcases[i];
> +
> +	TST_EXP_FAIL(close(tc->fd), tc->exp_errno, "%s", tc->desc);
> +}
> +
> +static void setup(void)
>  {
> -	TST_EXP_FAIL(close(-1), EBADF);
> +	int fd = SAFE_OPEN("close02", O_CREAT | O_RDWR, 0600);
> +
> +	SAFE_CLOSE(fd);
> +	tcases[1].fd = fd;

Depending on index is error-prone.  I know that test array has only 2 members,
but could you please use our usual approach to use file descriptors as static?
See fd_ebadf and fd_enotdir in testcases/kernel/syscalls/bind/bind01.c.

Kind regards,
Petr