Re: Detecting GVfs metadata support through C API

[Ondrej Holy <oholy redhat com>]

Hi Reuben,

sorry for the delay. The right way is to use g_file_query_writable_namespaces.

Regards

Ondrej

so 11. 7. 2020 v 16:51 odesílatel Reuben Green via gvfs-list
<gvfs-list gnome org> napsal:
> Hello,
>
> I am currently implementing a feature in a file browser to allow users
> to store viewing settings for each directory (e.g. sort order for
> displaying files). I am using GFile attributes to store this metadata,
> using methods like g_file_set_attributes_async to store key-value pairs.
> As I understand it, being able to write such metadata relies on the GVfs
> metadata service being available.
>
> I would like to detect when support for GVfs metadata is available using
> the C API. By "GVfs metadata support is available" I mean essentially
> "functions like g_file_set_attributes_async can successfully save
> metadata so that it will be available in future". My current method for
> doing this is to query DBus to see if the service name
> org.gtk.vfs.Metadata is available, and this method seems to function OK.
> However, I would like to know if there is a better way of doing this
> check (by "better" I mean roughly "more robust and accurate"), and in
> particular if it can be done without a DBus query.
>
> One method I have considered is looking at the list of running processes
> for the name "gvfsd-metadata", but that seems a bit kludgy to me, and
> perhaps unreliable (though I am not too sure about this).
>
> I have asked a question about this on Stack Overflow which gives some
> more details, see
> https://stackoverflow.com/questions/62715510/testing-for-gvfs-metadata-support-in-c
>
> I would be very grateful for any help with this.
>
> Many thanks,
>
> Reuben Green
>
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