SOLVED Re: how to start a kde application via shell script

[Sascha Güthling]

I take the SOLVED back. I would remove it from the subject but that
would mess up the thread.
I was too quick with my conclusion that it would work. It only works
when I call it from tty1 but still not with cron.

On Fri, May 22, 2009 at 8:47 AM, Jonas Norlander <jonorland at gmail.com> wrote:
> On Fri, May 22, 2009 at 2:29 PM, Sascha Güthling
> <guethling at googlemail.com> wrote:
>> On Thu, May 21, 2009 at 8:59 PM, Bruce Marshall <bmarsh at bmarsh.com> wrote:
>>> On Thursday 21 May 2009, Antonio Augusto (Mancha) wrote:
>>>> One of the reasons that it doesn't work from cron is that the cron
>>>> process doesn't have an X session associated with it.
>>>> You can try puting the following before calling the kde application:
>>>> export DISPLAY=0:0
>>>
>>> I recently got a similar command to work by using the display statement right
>>> in the cron line:
>>>
>>> */10 * * * * DISPLAY=:0.0 /usr/local/bin/keepxfd2
>>>
>>> The above runs a script I wrote.
>>
>> I tried both, I put 'export DISPLAY=0:0' and 'export DISPLAY=:0.0' in
>> my script before calling the KDE app, both didn't work. I got errors
>> saying "/usr/bin/bmix bad variable"
>>
>> Changing my the crontab didn't help either.
>>
>> But that told me to try piping the application start through export
>> DISPLAY=0:0 and that worked.
>> My script now looks as follows:
>> #!/bin/sh
>> /usr/bin/kmix | export DISPLAY=0:0
>>
>> It works great.
>>
>
> I don't understand why that work. For the record can someone explain?
>
> / Jonas
>
This works (at least if you call the script from tty1) because the
output of /usr/bin/kmix is send to and used as input (the pipe symbol
'|')  for export DISPLAY=0:0. That means that everything that happens
while starting kmix will happen on display 0:0 (your KDE desktop). In
this case kmix is started.

Unfortunately when executed by cron it still doesn't work.
Does anyone have another idea?

Thanks
Sascha