python - execute command and get output

Question

I need to build a server that can execute a command line command and send back the output of the command

Example:

for the command- echo hello world, the server will return the string "hello world".

I tried to use subprocess.call() function but it returns a number and not a string. I have the sever ready, i just need this this.

Code:

type=struct.pack("B",2) #packing type
data=subprocess.call(client_data, shell=True)
length=struct.pack("H",len(data)) #packing lenght
client_soc.send(type+length+data)

please read this tutorial on PMOTW

Pynchia
– Pynchia

2015-12-15 10:02:55 +00:00
Commented Dec 15, 2015 at 10:02 — Pynchia
– Pynchia, Commented Dec 15, 2015 at 10:02

MrHug · Accepted Answer · 2015-12-15 09:54:09Z

6

How about using subprocess.check_output instead? From the manual: "Run command with arguments and return its output as a byte string."

It would be something like data = subprocess.check_output(client_data, shell=True) then.

See this man page for more information.

answered Dec 15, 2015 at 9:54

MrHug

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Hossain Muctadir · Accepted Answer · 2015-12-15 10:06:38Z

2

Maybe this piece of code will help

import subprocess

proc = subprocess.Popen('ping google.com', stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
tmp = proc.stdout.read()
print tmp

answered Dec 15, 2015 at 10:06

Hossain Muctadir

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