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List:       fuse-devel
Subject:    Re: [fuse-devel] curlftpfs and streaming writes (was FUSE and
From:       nf2 <nf2 () scheinwelt ! at>
Date:       2007-11-29 23:49:23
Message-ID: 474F5003.6060108 () scheinwelt ! at
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Miklos Szeredi wrote:
>> i think this is only solvable by extending the file-system interface: 
>> allowing open() and lseek() to fail with ENOTSUP. i guess that's already 
>> possible and "just" requires some documentation in the libc manual.
>>     
>
> Lots of things are possible, but here I think your expectation, that
> apps will adapt to ftpfs is not a realistic one.
>   

What's the big deal if some applications can't save on ftpfs and display 
an error message when you hit the save button. FTP is not compatible 
with all file access modes - why shouldn't we be honest about that fact.

i just changed ftpfs to return ENOTSUP on open(O_RDWR) and tested some apps:

Kate, KWrite, Gimp, Inkscape, Nautilus (copying, moving files), VIM, 
NANO and Midnight Commander still work. I guess most KDE apps still work 
- because KIO doesn't encourage random file access.

Unfortunately GEdit, DIA and Openoffice don't work, but as soon as they 
switch to a better abstraction layer (GIO), they probably would.

I could live without GEdit on ftpfs (as there are lots of other 
editors), but Openoffice would certainly be nice.



> But hey, you can prove me wrong.  I just thing that _that_ ftpfs is
> not the same ftpfs that provides the expected file semantics.
>
> So if you want to go this way, I'd suggest to at least optionally
> provide buffering so that people may enable it if they want, dispite
> it's problems.
>   

I agree, optionally enabling buffering should still be possible... 
Perhaps with a warning message that people should be careful with big files.

Norbert




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