Thanks, that explains a lot. Adriaan Renting.
>>> On 4/6/2011 at 07:43 PM, Dan Stromberg <drsali...@gmail.com> wrote: > On Wed, Apr 6, 2011 at 12:47 AM, Adriaan Renting <rent...@astron.nl> wrote: >> >> >> This solves the problem using stdin=open(os.devnull, 'rb') instead of >> stdin=None makes it run even if there is input from stdin in the >> foreground process. >> >> The operating system is Ubuntu 8.04 >> I understood what Suspended (tty input) means. I don't understand why >> it waits for input if stdin=None. >> >> Thank you for your help. >> >> Adriaan Renting. >> -- >> http://mail.python.org/mailman/listinfo/python-list > > http://docs.python.org/library/subprocess.html > "With None, no redirection will occur; the child*s file handles will > be inherited from the parent." > > When a background process reads from a tty (which is most likely what > its inherited stdin is connected to), it gets a SIGTTIN, suspending > your background process. > > See also "ssh -n". -- http://mail.python.org/mailman/listinfo/python-list
