* Jerry Hill <[EMAIL PROTECTED]> [2007-07-04 11:23:33]:
>
> That's because you tied stdin to a pipe in your Popen call, but then
> tried to read from stdout. Try this instead:
My mistake. I had just 'typed' the command in the mail itself and forgot to
include the stdin, stdout, and stderr and mentioned it as hung based on some
recollection.
>
> >>> process = subprocess.Popen("ping -c 10 127.0.0.1",
> stdout=subprocess.PIPE, shell=True)
> >>> process.stdout.readlines()
I tried it again and found that giving the -c 10 returns a well defined
output.
Only when the program has executed and the output available, subprocess can
read through PIPE's stdout it seems ( not at any other time).
With killing, I loose the output.
>>> process = subprocess.Popen('ping 10 127.0.0.1', stdin=subprocess.PIPE,
stdout=subprocess.PIPE, stderr=subprocess.PIPE,shell=True)
>>> process.pid
3475
>>> import os
>>> import signal
>>> os.kill(process.pid,signal.SIGINT)
>>> process.stdout.read()
''
>>> # required output is lost!
--
O.R.Senthil Kumaran
http://uthcode.sarovar.org
--
http://mail.python.org/mailman/listinfo/python-list
