I need to get the output from netcat in python script. My current code is
response = subprocess.Popen(["netcat","smtp.myserver.net", "25"], stdout=subprocess.PIPE).stdout.read()
x = response.find("220 ***")
I want it to check for 200 * status and work with that, but it seems to wait for my input everytime it runs in a loop. How can I open netcat, get it's result, close it and move on?
Python has, built-in, an smtp client library that can do this trivially. Really. There's no reason not to use it.
from smtplib import SMTP
SMTP('smtp.myserver.net')
It's that simple. Catch the exceptions you care about.
Your program was waiting for you to type quit.
Solution? Close the writing-end first:
child = subprocess.Popen(["netcat","smtp.myserver.net", "25"],
stdout=subprocess.PIPE,
stdin=subprocess.PIPE)
child.stdin.close()
response = child.stdout.read()
x = response.find("220 ***")
The reason you need to do this is because by default standard input is still connecting netcat to your terminal.
