[issue41367] Popen Timeout raised on 3.6 but not on 3.8

[Irit Katriel]

Change by Irit Katriel :


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stage:  -> resolved
status: pending -> closed

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[issue41367] Popen Timeout raised on 3.6 but not on 3.8

[Irit Katriel]

Irit Katriel  added the comment:

3.6 is no longer maintained, so even if there was a bug in 3.6 that was fixed 
in 3.8 we aren't going to be able to do anything about it.

If nobody objects I will close this issue soon.

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nosy: +iritkatriel
resolution:  -> out of date
status: open -> pending

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[issue41367] Popen Timeout raised on 3.6 but not on 3.8

[Steve Stagg]

Steve Stagg  added the comment:

Joan, is that your *actual* password in the example code?  If so, I'd recommend 
changing it wherever you've used it.

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nosy: +stestagg

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[issue41367] Popen Timeout raised on 3.6 but not on 3.8

[Joan Prat Rigol]

New submission from Joan Prat Rigol :

If I run this code in Python 3.8 I get the result as expected:

Python 3.8.2 (default, Apr 27 2020, 15:53:34) 
[GCC 9.3.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import subprocess
>>> process = subprocess.Popen("sudo -Si ls -l /home", shell=True, stdin=-1, 
>>> stdout=-1, stderr=-1)
>>> out, err = process.communicate(input="Pr4tR1g01J04n\n".encode(), timeout=2)
>>> print(out)
b'total 4\ndrwxr-xr-x 43 joan joan 4096 Jul 22 09:46 joan\n'
>>> 
But If I run the code in Python 3.6 I am getting a timeout:

Python 3.6.9 (default, Apr 18 2020, 01:56:04) 
[GCC 8.4.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import subprocess
>>> process = subprocess.Popen("sudo -Si ls -l /home", shell=True, stdin=-1, 
>>> stdout=-1, stderr=-1)
>>> out, err = process.communicate(input="Pr4tR1g01J04n\n".encode(), timeout=2)
Traceback (most recent call last):
  File "", line 1, in 
  File "/usr/lib/python3.6/subprocess.py", line 863, in communicate
stdout, stderr = self._communicate(input, endtime, timeout)
  File "/usr/lib/python3.6/subprocess.py", line 1535, in _communicate
self._check_timeout(endtime, orig_timeout)
  File "/usr/lib/python3.6/subprocess.py", line 891, in _check_timeout
raise TimeoutExpired(self.args, orig_timeout)
subprocess.TimeoutExpired: Command 'sudo -Si ls -l /home' timed out after 2 
seconds
>>> 
Is this a bug?

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messages: 374089
nosy: Joan Prat Rigol
priority: normal
severity: normal
status: open
title: Popen Timeout raised on 3.6 but not on 3.8
versions: Python 3.6, Python 3.8

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