Viewing file:  lsb_release.py (1.82 KB) -rw-r--r--
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"""Get information from /usr/bin/lsb_release."""
import os
from subprocess import CalledProcessError, check_output
LSB_RELEASE = "/usr/bin/lsb_release"
LSB_RELEASE_FILENAME = "/etc/lsb_release"
LSB_RELEASE_FILE_KEYS = {
"DISTRIB_ID": "distributor-id",
"DISTRIB_DESCRIPTION": "description",
"DISTRIB_RELEASE": "release",
"DISTRIB_CODENAME": "code-name",
}
def parse_lsb_release(lsb_release_filename=None):
"""
Returns a C{dict} holding information about the system LSB release.
Reads from C{lsb_release_filename} if it exists, else calls
C{LSB_RELEASE}
"""
if lsb_release_filename and os.path.exists(lsb_release_filename):
return parse_lsb_release_file(lsb_release_filename)
with open(os.devnull, 'w') as FNULL:
try:
lsb_info = check_output([LSB_RELEASE, "-as"], stderr=FNULL)
except (CalledProcessError, FileNotFoundError):
# Fall back to reading file, even if it doesn't exist.
return parse_lsb_release_file(lsb_release_filename)
else:
dist, desc, release, code_name, _ = lsb_info.decode().split("\n")
return {
"distributor-id": dist,
"release": release,
"code-name": code_name,
"description": desc,
}
def parse_lsb_release_file(filename):
"""
Returns a C{dict} holding information about the system LSB release
by attempting to parse C{filename}.
@raises: A FileNotFoundError if C{filename} does not exist.
"""
info = {}
with open(filename) as fd:
for line in fd:
key, value = line.split("=")
if key in LSB_RELEASE_FILE_KEYS:
key = LSB_RELEASE_FILE_KEYS[key.strip()]
value = value.strip().strip('"')
info[key] = value
return info
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