[PATCH] Add the statx function

[Paul Eggert]

Florian Weimer wrote:

> +  *buf = (struct statx)
> +    {
> +      /* We copy everything from fstat64, which corresponds the basic
> +         fstat64.  */
> +      .stx_mask = STATX_BASIC_STATS,

That assignment to *BUF unnecessarily clears all *BUF fields not mentioned. It 
should be a bit more efficient to have a separate assignment for each mentioned 
field, e.g., 'buf->stx_mask = STATX_BASIC_STATS;'.

That "corresponds the" isn't grammatical and the comment has an incorrect 
"fstat64" and an unnecessary "We". The comment could be just "Copy everything 
from ST." or better yet it could just be omitted (it's pretty obvious).

> +int statx (int __dirfd, const char *__path, int __flags,
> +           unsigned int __mask, struct statx *__buf)
> +  __THROW __nonnull ((2, 5));

The two pointer parameters should both be declared with __restrict.