从 python 脚本中获取当前的 shell 类型

Question

My script sets some environment varrible, to be used by the Makefiles, so since every shell, bash(export to set varriable) and tcsh(setenv), I need to get the correct shell type, from where we have run the python, I have tried using $SHELL varrriable, but it always given me sh as my shell.

Is there a way, I can get the right shell type from a python script or will it always output "SH" as the $SHELL variable.

Answer 1

Sorry to bring this back from the dead but I just did this myself. The following should give you the path to your current shell:

from os import environ
print(environ['SHELL'])

You should be able to replace shell with any environment variable you're looking for.

Answer 2

For the case that a user has launched a shell of a different type from their login shell, and then invoked your Python script in that shell, you need to look at the executable used to run your script's parent process:

import os
os.path.realpath(f'/proc/{os.getppid()}/exe')