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

[Linus Torvalds]

On Sun, 10 Jun 2007, Al Viro wrote:
> 
> 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...

So it will still work better than trying to do a "getsockname()" or 
something. If the file descriptor really _has_ been changed, it might give 
a false negative (somebody replaced it with *another* socket), but on the 
other hand, that's much better than a false positive. And if somebody 
replaced the socket with a real file descriptor, it will catch it..

		Linus
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