Problem with XDG TryExec, how to force updating menu

jupiter jupiter.hce at
Tue Nov 27 05:09:46 CET 2012

Thanks for the response.

That package was made from a friend of mine, he installed it on KDE in
CentOS 6.2, it seems it works in KDE desktop, but not in XFCE 4

I am not too worry about if I could use the "touch" to make it work,
but rather try to see whether all xdg features can work properly in
xfce or not.

Thank you.

Kind regards.

On 11/27/12, Matthew Brush <mbrush at> wrote:
> On 12-11-26 04:03 PM, jupiter wrote:
>> Hi,
>> I am running XFCE 4 on CentOS 6.2. I have an issue when a Linux
>> package desktop application contains a TryExec statement which does
>> not update menu when the  If the binary path is present and when it is
>> executable according to the XDG spec.
>> The package has two desktop applications in /usr/share/applications,
>> request.desktop and response.desktop. the response.desktop has the
>> statement "TryExec=/usr/local/bin/", but that script is not
>> available until the application in request.desktop is called. It seems
>> that the menu is not updating after the
>> "TryExec=/usr/local/bin/" is available and therefore the
>> response application could not see on the menu.
> I doubt it sits there constantly polling the TryExec path, but rather
> I'd guess it uses file monitoring on the desktop entry itself (or the
> whole applications directory) to detect changes which triggers a
> reload/recheck (which would explain why "touch"ing it causes an update).
> I didn't look at the source, so it's just a guess, but it seems the most
> sane way to do it.
>> The only thing I could make the response item on menu is run "touch
>> /usr/share/applications/response.desktop" which triggering the menu
>> update. It is ugly and it is not workable.
>> Are there any commands / utilities can be used to force updating menu?
> You could delete the TryExec line from the response.desktop one so
> there's no check performed and it's always in the menu (the spec says
> it's not required). Another way would be to replace the request.desktop
> Exec command with a custom script that runs the original program and
> then "touch"es the response.desktop.
> Out of curiosity, what is the package with this weird desktop entry
> inter-dependency that is creating and deleting files in /usr/local/bin?
> Cheers,
> Matthew Brush
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