[LTP] close02: add test for double close EBADF

[Andrea Cervesato]

Hi Jinseok,

> Hi Jinseok,
> 
> On 2026-05-13, Jinseok Kim wrote:
> > close02: add test for double close EBADF
> 
> > +static void setup(void)
> > +{
> > +       fd_closed = SAFE_OPEN("close02", O_CREAT | O_RDWR, 0600);
> > +       if (close(fd_closed) == -1)
> > +               tst_brk(TBROK | TERRNO, "close(%d) failed", fd_closed);
> > +}
> 
> Use SAFE_CLOSE instead of a raw close(). Since SAFE_CLOSE sets the variable
> to -1, save the fd value first:
> 
>     int tmp_fd;
>     fd_closed = SAFE_OPEN("close02", O_CREAT | O_RDWR, 0600);
>     tmp_fd = fd_closed;
>     SAFE_CLOSE(tmp_fd);

This is a corner case, please ignore.

Reagrds,
--
Andrea Cervesato
SUSE QE Automation Engineer Linux
andrea.cervesato@suse.com