Re: Does sendfile() copy extended attributes?

[Jeff Garzik <jgarzik@pobox.com>]

Shaya Potter wrote:
> On Mon, 2003-12-15 at 00:46, Jeff Garzik wrote:
> 
>>Shaya Potter wrote:
>>
>>>On Sun, 2003-12-14 at 12:39, Joseph D. Wagner wrote:
>>>
>>>
>>>>I want to use sendfile() to completely copy a file so that the copy is an 
>>>>EXACT, INDISTINGUISHABLE duplicate of the original.
>>>>
>>>>Hence, I need to know if sendfile() copies the extended attributes in 
>>>>addition to the file itself.
>>>>
>>>>While I have your attention, does sendfile() also copy the inode attributes 
>>>>(i.e. secure delete, compressed, etc.)?
>>>
>>>
>>>sendfile acting as a sys_copy() is a 2.4 unsupported behavior.  It
>>>doesn't work on 2.6.
>>
>>
>>Have you tested this assertion lately?  :)
>>
>>AFAIK file-file sendfile(2) was fixed in 2.6.
> 
> 
> didn't work on test6, haven't tried it since.
> 
> Linux zaphod 2.6.0-test6 #1 Sat Oct 4 22:35:19 EDT 2003 i686 GNU/Linux
> spotter@zaphod:~$ touch a
> spotter@zaphod:~$ touch b
> spotter@zaphod:~$ ./a.out a b
> error from sendfile: Invalid argument


try it on a non-zero file size, there are special requirements IIRC...