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# Copyright 2010-2011 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
__all__ = ['ExtractKernelVersion']
import io
from portage import os, _encodings, _unicode_encode
from portage.util import getconfig, grabfile
def ExtractKernelVersion(base_dir):
"""
Try to figure out what kernel version we are running
@param base_dir: Path to sources (usually /usr/src/linux)
@type base_dir: string
@rtype: tuple( version[string], error[string])
@return:
1. tuple( version[string], error[string])
Either version or error is populated (but never both)
"""
lines = []
pathname = os.path.join(base_dir, 'Makefile')
try:
f = io.open(_unicode_encode(pathname,
encoding=_encodings['fs'], errors='strict'), mode='r',
encoding=_encodings['content'], errors='replace')
except OSError as details:
return (None, str(details))
except IOError as details:
return (None, str(details))
try:
for i in range(4):
lines.append(f.readline())
except OSError as details:
return (None, str(details))
except IOError as details:
return (None, str(details))
finally:
f.close()
lines = [l.strip() for l in lines]
version = ''
#XXX: The following code relies on the ordering of vars within the Makefile
for line in lines:
# split on the '=' then remove annoying whitespace
items = line.split("=")
items = [i.strip() for i in items]
if items[0] == 'VERSION' or \
items[0] == 'PATCHLEVEL':
version += items[1]
version += "."
elif items[0] == 'SUBLEVEL':
version += items[1]
elif items[0] == 'EXTRAVERSION' and \
items[-1] != items[0]:
version += items[1]
# Grab a list of files named localversion* and sort them
localversions = os.listdir(base_dir)
for x in range(len(localversions)-1,-1,-1):
if localversions[x][:12] != "localversion":
del localversions[x]
localversions.sort()
# Append the contents of each to the version string, stripping ALL whitespace
for lv in localversions:
version += "".join( " ".join( grabfile( base_dir+ "/" + lv ) ).split() )
# Check the .config for a CONFIG_LOCALVERSION and append that too, also stripping whitespace
kernelconfig = getconfig(base_dir+"/.config")
if kernelconfig and "CONFIG_LOCALVERSION" in kernelconfig:
version += "".join(kernelconfig["CONFIG_LOCALVERSION"].split())
return (version,None)
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