How do I get GUI Apps to run from crontab under XFce 4.4.2?

[Erik Harrison]

On Sun, Oct 26, 2008 at 10:10 PM, Todd and Margo Chester
<ToddAndMargo at verizon.net> wrote:
> Todd and Margo Chester wrote:
>> Erik Harrison wrote:
>>
>>>> It looks like it is trying to start, but doesn't finish. I think it
>>>> is not finding Todd's XFce 4.4.2?
>>> I dunno anything about Virtual Box, but I would guess it can't connect
>>> to X because it doesn't know the display. If Virtual Box supports
>>> something like --display you could use that, or just manually set
>>> $DISPLAY in your shell script.
>>>
>>
>> Thank you for the help!
>>
>> I go to the customer's site next Wednesday or Thursday.
>> I will try something like this:
>>
>>       DISPLAY=:0.0
>>       export DISPLAY
>>       EchoAll "Restarting VirtualXP"
>>       EchoAll "su todd  -c /usr/bin/VBoxManage startvm VirtualXP"
>>       EchoAll "`su todd  -c "/usr/bin/VBoxManage startvm VirtualXP"`"
>>       EchoAll " "
>
> Hi All,
>
> Got this back from the Virtual Box group:
>
>     http://forums.virtualbox.org/viewtopic.php?p=43159#43159
>     Todd, whilst I think on you will need to read on how X
>     authorization works with cookies and XAUTHORITY etc.
>     Basically the display uses a security model to prevent
>     rogue processes hijacking the display. There are ways
>     to get around this, but you need to read up on it.
>
> I have not a clue where to start.  Anyone know where to
> point me?  Any good references?

Most definitely not Xfce related at this point, but I'm willing to
guess that man xhost will get you started.

>
> Many thanks,
> -T
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-- 
Erik
"It's true, Alice Cooper is a hippie, but he's the bad kind of hippie.
He's the kind of hippie that breaks into people's offices, beats them
up, and shoots them in the head. Why? To steal their antique chairs."