changed:
-            # build the command to run the sub process
            # build the command to run the sub process:
            # this uses the python from your path; if this
            # not the one required to run Roundup, use instead:
            #   '%s/bin/python %s'%(sys.prefix, ...

added:
    class devnull:
        def write(self, *args):
            pass
        def writelines(self, *args):
            pass
        def flush(self, *args):
            pass

added:

        # throw away anything that might be written to stdout
        # because the real stdout is a pipe that our caller does not
        # read from and that therefore might block
        sys.stdout = devnull()

added:

History:

- 07.03.2007: added remark abour Python prefix, added stdout redirection to avoid deadlock -- Patrick Ohly