use of a GChildWatch source

[awalter1]

Hello

I am using python, pyGTK and GTK+ on HPUX (unix)
In this context, the pygtk documentation about gobject.spawn_async says
: ... you must use a GChildWatch source to be notified about the death
of the child process ...
Does someone know where to find details about GChildWatch ? I didn't
retrieve any thing on the net.
In addition, does someone be aware about some limitations concerning
subprocesses creation in a python/GTK application
Thanks a lot