lfs-ru/chapter10/kernel/kernel_version.py

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#!/usr/bin/env python3
def kernel_version(path):
version = None
patchlevel = None
sublevel = None
with open(path + 'Makefile') as f:
for line in f:
if line.startswith('VERSION ='):
version = line[len('VERSION ='):].strip()
elif line.startswith('PATCHLEVEL ='):
patchlevel = line[len('PATCHLEVEL ='):].strip()
elif line.startswith('SUBLEVEL ='):
sublevel = line[len('SUBLEVEL ='):].strip()
assert(version and patchlevel and sublevel)
return '.'.join([version, patchlevel, sublevel])
if __name__ == '__main__':
from sys import argv
path = argv[1]
if path[:-1] != '/':
path += '/'
print(kernel_version(path))