[Owncloud] invalid character ":" - historical artefact?

Klaas Freitag freitag at owncloud.com
Fri Sep 27 09:30:33 UTC 2013

On 27.09.2013 10:40, Markus Goetz wrote:
> Hi Stefan,
> On 27.09.13 10:01, Stefan Vollmar wrote:
>> one of our scientists tried to sync files with a colon in the
>> filename. This failed with an "Invalid characters" comment in the sync
>> log. I know that colons were a no-no in file paths on Mac operating
>> systems before MacOS X as the colon was used as a path separator.
>> However, as far as I know, this is history and the colon (much as a
>> bunch of other "special" characters including "!", "&", "?" or, in
>> particular " " which I would not use in my own work) traditionally
>> makes life unnecessarily difficult when scripting on Unix - but it is
>> technically possible to use on all modern file systems (though, again,
>> probably not advisable). But maybe there is a technical reason to
>> forbid colons in file names that I am not aware of?
> I think the reasoning is that a file should be able to be synced on
> Linux, OS X and Windows. And Windows uses : for the drive letter,
> c:\owncloud\ .. So it is out.

Yes, we decided to only allow chars that work on all three supported 


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