os.system() inside a thread problem

[Daniel Bernhardt]

Hello,

my thread calls a program with os.system().[color=blue]
> os.system("/usr/bin/wine /path/to/ultima/online.exe")[/color]
Ultima Online is starting and i can enter commands and navigate through the
game with my keyboard. If I move the mouse over the Ultima Online window
Ultima Online crashes. (the mouse just need to overlap 1 pixel of the egde
of the window. titlebar inlcuded)[color=blue]
> /usr/bin/wine: line 55: 11675 Segmentation fault[/color]
Same with os.popen()

If I run os.system() outside the thread everything is working like expected.
Other programs (wine emulated and nativ) work inside and outside the thread.

Can anyone tell me how I can fix this?
Google told me simillar problems were fixed by upgrading to python 2.4. that
is no option for me.

Thanks,
Daniel


some example code:

from threading import Thread
runuo = StartUO(command )
runuo.start()

class StartUO(Thread) :
def __init__(self,c ommand):
Thread.__init__ (self)
self.command = command
def run(self):
os.execv(self.c ommand)

[Fredrik Lundh]

Re: os.system() inside a thread problem

Daniel Bernhardt wrote:
[color=blue]
> my thread calls a program with os.system().[color=green]
>> os.system("/usr/bin/wine /path/to/ultima/online.exe")[/color][/color]

in the example you included, you use execv. which one is it?
[color=blue]
> Ultima Online is starting and i can enter commands and navigate through the
> game with my keyboard. If I move the mouse over the Ultima Online window
> Ultima Online crashes. (the mouse just need to overlap 1 pixel of the egde
> of the window. titlebar inlcuded)[color=green]
>> /usr/bin/wine: line 55: 11675 Segmentation fault[/color]
> Same with os.popen()
>
> If I run os.system() outside the thread everything is working like expected.
> Other programs (wine emulated and nativ) work inside and outside the thread.
>
> Can anyone tell me how I can fix this?[/color]

just curious: do you really have to use a thread? why not just do

os.system(comma nd + "&")

</F>

[Daniel Bernhardt]

Re: os.system() inside a thread problem

Fredrik Lundh wrote:
[color=blue]
> in the example you included, you use execv. which one is it?[/color]

it should be system(). I just played a bit and forgot to change it back.
[color=blue]
>
> just curious: do you really have to use a thread? why not just do
>
> os.system(comma nd + "&")
>[/color]

No, i don't need to use a thread. I just wanted learn something about it and
thought it would be a good start.
I will use "os.system(comm and + "&")" as you said to solve the problem.
Thanks.