Module 'subprocess' may be a better fit for you than fork+exec. Here's an example with a signal handler (1) use subprocess, don't fork and exec (2) maybe this will help:
--- import signal, subprocess # define the signal handler def logsignal(signum, frame): print "Caught signal" # register the signal handler for SIGCHLD signal.signal(signal.SIGCHLD, logsignal) # run the subprocess in the background subprocess.Popen(["sleep", "3"]) # Do more stuff --- The signal handler will be called when the child process ends. Just register your own handler. You only need to register the handler once. If you need this for a single run only, or need different behavior for different subprocesses, have your signal handler re-register the old handler (see the docs for module 'signal'). A note about the example: if you run it as is, the parent process will end before the child process does. Add a call to 'os.wait()' to have it wait for the child. In your GUI you probably won't want it. Hope this helps. awalter1 wrote: > Hi, > I develop a graphical user interface (with pyGTK) where a click on a > button shall launch a program P in background. I want to get the end of > this program P but I don't want that my HMI be freezed while P is > running. > I try to use fork examplesI found on the web, but it seems to not run > as expected. > I am not familiar with these techniques in unix as well as python. > But I suppose that my needs are usual, despite that I don't find > anything on the web ... > Is someone can give me a standard way to call a background program, > wait its end, with an IHM still active ? > > Thank a lot for any idea. -- http://mail.python.org/mailman/listinfo/python-list
