What is the simplest way to run an app from GTK and read its output ?

[Colossus <colossus 3000 it>]

Hi,

I ask this question because I have a problem with my implementation of 
the email subject with g_spawn_async_with_pipes and g_child_watch_add 
(). The problem is that the function I register with g_child_watch_add 
 is called BEFORE the child spawned with g_spawn_async_with_pipes has 
exited even though the docs says:

'Sets a function to be called when the child indicated by pid exits, 
at a default priority, G_PRIORITY_DEFAULT.'

So how can an executable be run from GTK and read its output ?

Thank you,
--
Colossus
Xarchiver, a GTK2 only archive manager - http://xarchiver.sourceforge.net
Cpsed, a Linux OpenGL 3D scene editor - http://cpsed.sourceforge.net
Mizio, a QT proxy hunter scanner tool - http://mizio.sourceforge.net