Re: [patch 7/8] fdmap v2 - implement sys_socket2

[Al Viro]

On Sat, Jun 09, 2007 at 10:06:27PM -0700, Linus Torvalds wrote:
> Why the hell doesn't that thing just do an "fstat()" on the thing, and 
> compare the inode number? Not that I would guarantee that it works either 
> for a socket, but it would seem to make more sense than what it apparently 
> does now, and I think it should work at least on Linux.

It works on Linux, all right.

> (Ie linux will give fake "st_ino" numbers to sockets. Whether anybody else 
> will do that, I have no friggin clue. And you probably shouldn't depend on 
> it even under Linux, but damn, despite all of those issues, it's likely 
> better and more logical than what libnss-ldap apparently does now ;)

On FreeBSD it will simply give you zero st_ino on almost all sockets;
AF_UNIX ones get st_ino invented (and stable).  st_dev is NODEV in all
cases...
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