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# Copyright (C) 2012 Canonical Ltd.
# Copyright (C) 2012, 2013 Hewlett-Packard Development Company, L.P.
# Copyright (C) 2012 Yahoo! Inc.
#
# Author: Scott Moser <scott.moser@canonical.com>
# Author: Juerg Haefliger <juerg.haefliger@hp.com>
# Author: Joshua Harlow <harlowja@yahoo-inc.com>
#
# This file is part of cloud-init. See LICENSE file for license information.
from cloudinit import log as logging
from cloudinit import util
from cloudinit.distros.parsers.sys_conf import SysConf
LOG = logging.getLogger(__name__)
# Helper function to update a RHEL/SUSE /etc/sysconfig/* file
def update_sysconfig_file(fn, adjustments, allow_empty=False):
if not adjustments:
return
(exists, contents) = read_sysconfig_file(fn)
updated_am = 0
for (k, v) in adjustments.items():
if v is None:
continue
v = str(v)
if len(v) == 0 and not allow_empty:
continue
contents[k] = v
updated_am += 1
if updated_am:
lines = [
str(contents),
]
if not exists:
lines.insert(0, util.make_header())
util.write_file(fn, "\n".join(lines) + "\n", 0o644)
# Helper function to read a RHEL/SUSE /etc/sysconfig/* file
def read_sysconfig_file(fn):
exists = False
try:
contents = util.load_file(fn).splitlines()
exists = True
except IOError:
contents = []
return (exists, SysConf(contents))
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