Re: `rmdir .` doesn't work in 2.4

[Stephen C. Tweedie]

Hi,

On Mon, Jan 08, 2001 at 09:28:33PM +0100, Andrea Arcangeli wrote:
> On Mon, Jan 08, 2001 at 12:58:20PM -0500, Alexander Viro wrote:
> > It's a hell of a pain wrt locking. You need to lock the parent, but it can
> 
> This is a no-brainer and bad implementation, but shows it's obviously right
> wrt locking. (pseudocode, I ignored the uaccess details and all the other not
> relevant things)
> 
>               err = sys_getcwd(buf, PAGE_SIZE)
>               if (!memcmp(path, ".", 2))
>                       path = buf
>               err = 2_4_0_sys_rmdir(path)

> Could you enlight me on where's the locking pain?

Do the above while another process is renaming one of your parents and
watch an innocent directory get shot down in flames, or prepare for an
incorrect ENOENT.

--Stephen
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