[LTP] syscalls: Add epoll_ctl07

[Cyril Hrubis]

Hi!
> A fallback definition belongs in lapi/epoll.h:
> 
>   #ifndef EPOLLEXCLUSIVE
>   #define EPOLLEXCLUSIVE (1u << 28)
>   #endif

Indeed it fails to compile on older distros, I will add the fallback.

> > +	if (round == NWAITERS)
> > +		tst_res(TPASS, "each event woke exactly one waiter");
> > +
> > +	SAFE_CLOSE(fds[0]);
> > +	SAFE_CLOSE(fds[1]);
> > +}
> 
> run() forks NWAITERS children but never calls tst_reap_children().
> Each child calls exit(0) after the checkpoint wake, so they are all
> finished by the time the loop exits, but the parent leaves them as
> zombies. The structurally identical epoll_wait15.c calls
> tst_reap_children() after its equivalent loop. Should tst_reap_children()
> be called here before or after the result is reported?

Children that exit(0) are autocollected by the test library.

-- 
Cyril Hrubis
chrubis@suse.cz