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# This file is a portion of the Red Hat Update Agent
# Copyright (c) 1999--2020 Red Hat, Inc. Distributed under GPL
#
# Authors:
# Cristian Gafton <gafton@redhat.com>
# Adrian Likins <alikins@redhat.com>
#
"""
This module includes the Config and Up2date Config classes use by the
up2date agent to hold config info.
"""
import os
import sys
import locale
import requests
from rhn.connections import idn_ascii_to_puny, idn_puny_to_unicode
from rhn.i18n import ustr, sstr
try: # python2
from urlparse import urlsplit, urlunsplit
except ImportError: # python3
from urllib.parse import urlsplit, urlunsplit
import gettext
t = gettext.translation('rhn-client-tools', fallback=True)
# Python 3 translations don't have a ugettext method
if not hasattr(t, 'ugettext'):
t.ugettext = t.gettext
_ = t.ugettext
# XXX: This could be moved in a more "static" location if it is too
# much of an eye sore
Defaults = {
'enableProxy' : ("Use a HTTP Proxy",
0),
'serverURL' : ("Remote server URL",
"https://xmlrpc.cln.cloudlinux.com/XMLRPC/"),
'mirrorURL' : ("Mirror list URL",
"https://repo.cloudlinux.com/cloudlinux/mirrorlists/cln-mirrors"),
'debug' : ("Whether or not debugging is enabled",
0),
'systemIdPath' : ("Location of system id",
"/etc/sysconfig/rhn/systemid"),
'versionOverride' : ("Override the automatically determined "\
"system version",
""),
'httpProxy' : ("HTTP proxy in host:port format, e.g. "\
"squid.example.com:3128",
""),
'proxyUser' : ("The username for an authenticated proxy",
""),
'proxyPassword' : ("The password to use for an authenticated proxy",
""),
'enableProxyAuth' : ("To use an authenticated proxy or not",
0),
'networkRetries' : ("Number of attempts to make at network "\
"connections before giving up",
1),
'sslCACert' : ("The CA cert used to verify the ssl server",
"/usr/share/rhn/CLN-ORG-TRUSTED-SSL-CERT"),
'noReboot' : ("Disable the reboot action",
0),
'disallowConfChanges': ("Config options that can not be overwritten by a config update action",
['sslCACert','serverURL','disallowConfChanges',
'noReboot']),
}
FileOptions = ['systemIdPath', 'sslCACert', 'tmpDir', ]
# a peristent configuration storage class
class ConfigFile:
"class for handling persistent config options for the client"
def __init__(self, filename = None):
self.dict = {}
self.fileName = filename
if self.fileName:
self.load()
def load(self, filename = None):
if filename:
self.fileName = filename
if self.fileName == None:
return
if not os.access(self.fileName, os.R_OK):
# print("warning: can't access %s" % self.fileName)
return
f = open(self.fileName, "r")
multiline = ''
for line in f.readlines():
# strip comments
if line.find('#') == 0:
continue
line = multiline + line.strip()
if not line:
continue
# if line ends in '\', append the next line before parsing
if line[-1] == '\\':
multiline = line[:-1].strip()
continue
else:
multiline = ''
split = line.split('=', 1)
if len(split) != 2:
# not in 'a = b' format. we should log this
# or maybe error.
continue
key = split[0].strip()
value = ustr(split[1].strip())
# decode a comment line
comment = None
pos = key.find("[comment]")
if pos != -1:
key = key[:pos]
comment = value
value = None
# figure out if we need to parse the value further
if value:
# possibly split value into a list
values = value.split(";")
if key in ['proxyUser', 'proxyPassword']:
value = sstr(value.encode(locale.getpreferredencoding()))
elif len(values) == 1:
try:
value = int(value)
except ValueError:
pass
elif values[0] == "":
value = []
else:
# there could be whitespace between the values on
# one line, let's strip it out
value = [val.strip() for val in values if val.strip() ]
# now insert the (comment, value) in the dictionary
newval = (comment, value)
if key in self.dict: # do we need to update
newval = self.dict[key]
if comment is not None: # override comment
newval = (comment, newval[1])
if value is not None: # override value
newval = (newval[0], value)
self.dict[key] = newval
f.close()
def save(self):
if self.fileName == None:
return
# this really shouldn't happen, since it means that the
# /etc/sysconfig/rhn directory doesn't exist, which is way broken
# and note the attempted fix breaks useage of this by the applet
# since it reuses this code to create its config file, and therefore
# tries to makedirs() the users home dir again (with a specific perms)
# and fails (see #130391)
if not os.access(self.fileName, os.R_OK):
if not os.access(os.path.dirname(self.fileName), os.R_OK):
print(_("%s was not found" % os.path.dirname(self.fileName)))
return
f = open(self.fileName+'.new', "w")
os.chmod(self.fileName+'.new', int('0644', 8))
f.write("# Automatically generated Red Hat Update Agent "\
"config file, do not edit.\n")
f.write("# Format: 1.0\n")
f.write("")
for key in self.dict.keys():
(comment, value) = self.dict[key]
f.write(sstr(u"%s[comment]=%s\n" % (key, comment)))
if type(value) != type([]):
value = [ value ]
if key in FileOptions:
value = map(os.path.abspath, value)
f.write(sstr(u"%s=%s\n" % (key, ';'.join(map(str, value)))))
f.write("\n")
f.close()
os.rename(self.fileName+'.new', self.fileName)
# dictionary interface
def __contains__(self, name):
return name in self.dict
def has_key(self, name):
# obsoleted, left for compatibility with older python
return name in self
def keys(self):
return self.dict.keys()
def values(self):
return [a[1] for a in self.dict.values()]
def update(self, dict):
self.dict.update(dict)
# we return None when we reference an invalid key instead of
# raising an exception
def __getitem__(self, name):
if name in self.dict:
return self.dict[name][1]
return None
def __setitem__(self, name, value):
if name in self.dict:
val = self.dict[name]
else:
val = (None, None)
self.dict[name] = (val[0], value)
# we might need to expose the comments...
def info(self, name):
if name in self.dict:
return self.dict[name][0]
return ""
# a superclass for the ConfigFile that also handles runtime-only
# config values
class Config:
def __init__(self, filename = None):
self.stored = ConfigFile()
self.stored.update(Defaults)
if filename:
self.stored.load(filename)
self.runtime = {}
# classic dictionary interface: we prefer values from the runtime
# dictionary over the ones from the stored config
def __contains__(self, name):
if name in self.runtime:
return True
if name in self.stored:
return True
return False
def has_key(self, name):
# obsoleted, left for compatibility with older python
return name in self
def keys(self):
ret = list(self.runtime.keys())
for k in self.stored.keys():
if k not in ret:
ret.append(k)
return ret
def values(self):
ret = []
for k in self.keys():
ret.append(self.__getitem__(k))
return ret
def items(self):
ret = []
for k in self.keys():
ret.append((k, self.__getitem__(k)))
return ret
def __len__(self):
return len(self.keys())
def __setitem__(self, name, value):
self.runtime[name] = value
# we return None when nothing is found instead of raising and exception
def __getitem__(self, name):
if name in self.runtime:
return self.runtime[name]
if name in self.stored:
return self.stored[name]
return None
# These function expose access to the peristent storage for
# updates and saves
def info(self, name): # retrieve comments
return self.stored.info(name)
def save(self):
self.stored.save()
def load(self, filename):
self.stored.load(filename)
# make sure the runtime cache is not polluted
for k in self.stored.keys():
if not k in self.runtime:
continue
# allow this one to pass through
del self.runtime[k]
# save straight in the persistent storage
def set(self, name, value):
self.stored[name] = value
# clean up the runtime cache
if name in self.runtime:
del self.runtime[name]
def getProxySetting():
""" returns proxy string in format hostname:port
hostname is converted to Punycode (RFC3492) if needed
"""
cfg = initUp2dateConfig()
proxy = None
proxyHost = cfg["httpProxy"]
if proxyHost:
if proxyHost[:7] == "http://":
proxyHost = proxyHost[7:]
parts = proxyHost.split(':')
parts[0] = str(idn_ascii_to_puny(parts[0]))
proxy = ':'.join(parts)
return proxy
def convert_url_to_puny(url):
""" returns url where hostname is converted to Punycode (RFC3492) """
s = urlsplit(url)
return sstr(urlunsplit((s[0], ustr(idn_ascii_to_puny(s[1])), s[2], s[3], s[4])))
def convert_url_from_puny(url):
""" returns url where hostname is converted from Punycode (RFC3492). Returns unicode string. """
s = urlsplit(url)
return ustr(urlunsplit((s[0], idn_puny_to_unicode(s[1]), s[2], s[3], s[4])))
def getServerlURLFromMirror():
url = cfg['mirrorURL']
if url is None:
url = "https://repo.cloudlinux.com/cloudlinux/mirrorlists/cln-mirrors"
if url.startswith("file://"):
with open(url.replace("file://", ""), "r") as mirrorlist:
mirrors = map(str.strip, mirrorlist.readlines())
return [convert_url_to_puny(mirror) for mirror in mirrors if mirror]
request = requests.get(url)
return [convert_url_to_puny(mirror) for mirror in request.text.split('\n') if mirror]
def getServerlURL():
""" return list of serverURL from config
Note: in config may be one value or more values, but this
function always return list
"""
cfg = initUp2dateConfig()
# serverURL may be a list in the config file, so by default, grab the
# first element.
if type(cfg['serverURL']) == type([]):
return [convert_url_to_puny(i) for i in cfg['serverURL']]
else:
return [convert_url_to_puny(cfg['serverURL'])]
def setServerURL(serverURL):
""" Set serverURL in config """
cfg = initUp2dateConfig()
cfg.set('serverURL', serverURL)
def setSSLCACert(sslCACert):
""" Set sslCACert in config """
cfg = initUp2dateConfig()
cfg.set('sslCACert', sslCACert)
def initUp2dateConfig(cfg_file = "/etc/sysconfig/rhn/up2date"):
"""This function is the right way to get at the up2date config."""
global cfg
try:
cfg
except NameError:
cfg = None
if cfg == None:
cfg = Config(cfg_file)
cfg["isatty"] = False
if sys.stdout.isatty():
cfg["isatty"] = True
return cfg
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