[Twisted-Python] calling unix commands

[Konrad Rokicki]

Hey everyone,
I'm having a problem calling a unix comand from inside a twisted program..
I do
	os.popen(cmd).readlines()
and I sporadically get:
	IOError: [Errno 4] Interrupted system call

Sounds like it might be an async problem.. is there a preferred way to do
this in twisted?

Thanks,
Konrad