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community.general/lib/ansible/module_utils/basic.py

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# This code is part of Ansible, but is an independent component.
# This particular file snippet, and this file snippet only, is BSD licensed.
# Modules you write using this snippet, which is embedded dynamically by Ansible
# still belong to the author of the module, and may assign their own license
# to the complete work.
#
# Copyright (c), Michael DeHaan <michael.dehaan@gmail.com>, 2012-2013
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without modification,
# are permitted provided that the following conditions are met:
#
# * Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# * Redistributions in binary form must reproduce the above copyright notice,
# this list of conditions and the following disclaimer in the documentation
# and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
# IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
# PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
# USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#
# == BEGIN DYNAMICALLY INSERTED CODE ==
MODULE_ARGS = "<<INCLUDE_ANSIBLE_MODULE_ARGS>>"
MODULE_COMPLEX_ARGS = "<<INCLUDE_ANSIBLE_MODULE_COMPLEX_ARGS>>"
BOOLEANS_TRUE = ['yes', 'on', '1', 'true', 1]
BOOLEANS_FALSE = ['no', 'off', '0', 'false', 0]
BOOLEANS = BOOLEANS_TRUE + BOOLEANS_FALSE
# ansible modules can be written in any language. To simplify
# development of Python modules, the functions available here
# can be inserted in any module source automatically by including
# #<<INCLUDE_ANSIBLE_MODULE_COMMON>> on a blank line by itself inside
# of an ansible module. The source of this common code lives
# in lib/ansible/module_common.py
import locale
import os
import re
import pipes
import shlex
import subprocess
import sys
import syslog
import types
import time
import shutil
import stat
import tempfile
import traceback
import grp
import pwd
import platform
import errno
import tempfile
try:
import json
except ImportError:
try:
import simplejson as json
except ImportError:
sys.stderr.write('Error: ansible requires a json module, none found!')
sys.exit(1)
except SyntaxError:
sys.stderr.write('SyntaxError: probably due to json and python being for different versions')
sys.exit(1)
HAVE_SELINUX=False
try:
import selinux
HAVE_SELINUX=True
except ImportError:
pass
HAVE_HASHLIB=False
try:
from hashlib import md5 as _md5
HAVE_HASHLIB=True
except ImportError:
from md5 import md5 as _md5
try:
from hashlib import sha256 as _sha256
except ImportError:
pass
try:
from systemd import journal
has_journal = True
except ImportError:
import syslog
has_journal = False
try:
from ast import literal_eval as _literal_eval
except ImportError:
# a replacement for literal_eval that works with python 2.4. from:
# https://mail.python.org/pipermail/python-list/2009-September/551880.html
# which is essentially a cut/past from an earlier (2.6) version of python's
# ast.py
from compiler import parse
from compiler.ast import *
def _literal_eval(node_or_string):
"""
Safely evaluate an expression node or a string containing a Python
expression. The string or node provided may only consist of the following
Python literal structures: strings, numbers, tuples, lists, dicts, booleans,
and None.
"""
_safe_names = {'None': None, 'True': True, 'False': False}
if isinstance(node_or_string, basestring):
node_or_string = parse(node_or_string, mode='eval')
if isinstance(node_or_string, Expression):
node_or_string = node_or_string.node
def _convert(node):
if isinstance(node, Const) and isinstance(node.value, (basestring, int, float, long, complex)):
return node.value
elif isinstance(node, Tuple):
return tuple(map(_convert, node.nodes))
elif isinstance(node, List):
return list(map(_convert, node.nodes))
elif isinstance(node, Dict):
return dict((_convert(k), _convert(v)) for k, v in node.items)
elif isinstance(node, Name):
if node.name in _safe_names:
return _safe_names[node.name]
elif isinstance(node, UnarySub):
return -_convert(node.expr)
raise ValueError('malformed string')
return _convert(node_or_string)
FILE_COMMON_ARGUMENTS=dict(
src = dict(),
mode = dict(),
owner = dict(),
group = dict(),
seuser = dict(),
serole = dict(),
selevel = dict(),
setype = dict(),
# not taken by the file module, but other modules call file so it must ignore them.
content = dict(),
backup = dict(),
force = dict(),
remote_src = dict(), # used by assemble
delimiter = dict(), # used by assemble
directory_mode = dict(), # used by copy
)
def get_platform():
''' what's the platform? example: Linux is a platform. '''
return platform.system()
def get_distribution():
''' return the distribution name '''
if platform.system() == 'Linux':
try:
distribution = platform.linux_distribution()[0].capitalize()
if not distribution and os.path.isfile('/etc/system-release'):
distribution = platform.linux_distribution(supported_dists=['system'])[0].capitalize()
if 'Amazon' in distribution:
distribution = 'Amazon'
else:
distribution = 'OtherLinux'
except:
# FIXME: MethodMissing, I assume?
distribution = platform.dist()[0].capitalize()
else:
distribution = None
return distribution
def get_distribution_version():
''' return the distribution version '''
if platform.system() == 'Linux':
try:
distribution_version = platform.linux_distribution()[1]
if not distribution_version and os.path.isfile('/etc/system-release'):
distribution_version = platform.linux_distribution(supported_dists=['system'])[1]
except:
# FIXME: MethodMissing, I assume?
distribution_version = platform.dist()[1]
else:
distribution_version = None
return distribution_version
def load_platform_subclass(cls, *args, **kwargs):
'''
used by modules like User to have different implementations based on detected platform. See User
module for an example.
'''
this_platform = get_platform()
distribution = get_distribution()
subclass = None
# get the most specific superclass for this platform
if distribution is not None:
for sc in cls.__subclasses__():
if sc.distribution is not None and sc.distribution == distribution and sc.platform == this_platform:
subclass = sc
if subclass is None:
for sc in cls.__subclasses__():
if sc.platform == this_platform and sc.distribution is None:
subclass = sc
if subclass is None:
subclass = cls
return super(cls, subclass).__new__(subclass)
class AnsibleModule(object):
def __init__(self, argument_spec, bypass_checks=False, no_log=False,
check_invalid_arguments=True, mutually_exclusive=None, required_together=None,
required_one_of=None, add_file_common_args=False, supports_check_mode=False):
'''
common code for quickly building an ansible module in Python
(although you can write modules in anything that can return JSON)
see library/* for examples
'''
self.argument_spec = argument_spec
self.supports_check_mode = supports_check_mode
self.check_mode = False
self.no_log = no_log
self.cleanup_files = []
self.aliases = {}
if add_file_common_args:
for k, v in FILE_COMMON_ARGUMENTS.iteritems():
if k not in self.argument_spec:
self.argument_spec[k] = v
# check the locale as set by the current environment, and
# reset to LANG=C if it's an invalid/unavailable locale
self._check_locale()
(self.params, self.args) = self._load_params()
self._legal_inputs = ['CHECKMODE', 'NO_LOG']
self.aliases = self._handle_aliases()
if check_invalid_arguments:
self._check_invalid_arguments()
self._check_for_check_mode()
self._check_for_no_log()
# check exclusive early
if not bypass_checks:
self._check_mutually_exclusive(mutually_exclusive)
self._set_defaults(pre=True)
if not bypass_checks:
self._check_required_arguments()
self._check_argument_values()
self._check_argument_types()
self._check_required_together(required_together)
self._check_required_one_of(required_one_of)
self._set_defaults(pre=False)
if not self.no_log:
self._log_invocation()
# finally, make sure we're in a sane working dir
self._set_cwd()
def load_file_common_arguments(self, params):
'''
many modules deal with files, this encapsulates common
options that the file module accepts such that it is directly
available to all modules and they can share code.
'''
path = params.get('path', params.get('dest', None))
if path is None:
return {}
else:
path = os.path.expanduser(path)
mode = params.get('mode', None)
owner = params.get('owner', None)
group = params.get('group', None)
# selinux related options
seuser = params.get('seuser', None)
serole = params.get('serole', None)
setype = params.get('setype', None)
selevel = params.get('selevel', None)
secontext = [seuser, serole, setype]
if self.selinux_mls_enabled():
secontext.append(selevel)
default_secontext = self.selinux_default_context(path)
for i in range(len(default_secontext)):
if i is not None and secontext[i] == '_default':
secontext[i] = default_secontext[i]
return dict(
path=path, mode=mode, owner=owner, group=group,
seuser=seuser, serole=serole, setype=setype,
selevel=selevel, secontext=secontext,
)
# Detect whether using selinux that is MLS-aware.
# While this means you can set the level/range with
# selinux.lsetfilecon(), it may or may not mean that you
# will get the selevel as part of the context returned
# by selinux.lgetfilecon().
def selinux_mls_enabled(self):
if not HAVE_SELINUX:
return False
if selinux.is_selinux_mls_enabled() == 1:
return True
else:
return False
def selinux_enabled(self):
if not HAVE_SELINUX:
seenabled = self.get_bin_path('selinuxenabled')
if seenabled is not None:
(rc,out,err) = self.run_command(seenabled)
if rc == 0:
self.fail_json(msg="Aborting, target uses selinux but python bindings (libselinux-python) aren't installed!")
return False
if selinux.is_selinux_enabled() == 1:
return True
else:
return False
# Determine whether we need a placeholder for selevel/mls
def selinux_initial_context(self):
context = [None, None, None]
if self.selinux_mls_enabled():
context.append(None)
return context
def _to_filesystem_str(self, path):
'''Returns filesystem path as a str, if it wasn't already.
Used in selinux interactions because it cannot accept unicode
instances, and specifying complex args in a playbook leaves
you with unicode instances. This method currently assumes
that your filesystem encoding is UTF-8.
'''
if isinstance(path, unicode):
path = path.encode("utf-8")
return path
# If selinux fails to find a default, return an array of None
def selinux_default_context(self, path, mode=0):
context = self.selinux_initial_context()
if not HAVE_SELINUX or not self.selinux_enabled():
return context
try:
ret = selinux.matchpathcon(self._to_filesystem_str(path), mode)
except OSError:
return context
if ret[0] == -1:
return context
# Limit split to 4 because the selevel, the last in the list,
# may contain ':' characters
context = ret[1].split(':', 3)
return context
def selinux_context(self, path):
context = self.selinux_initial_context()
if not HAVE_SELINUX or not self.selinux_enabled():
return context
try:
ret = selinux.lgetfilecon_raw(self._to_filesystem_str(path))
except OSError, e:
if e.errno == errno.ENOENT:
self.fail_json(path=path, msg='path %s does not exist' % path)
else:
self.fail_json(path=path, msg='failed to retrieve selinux context')
if ret[0] == -1:
return context
# Limit split to 4 because the selevel, the last in the list,
# may contain ':' characters
context = ret[1].split(':', 3)
return context
def user_and_group(self, filename):
filename = os.path.expanduser(filename)
st = os.lstat(filename)
uid = st.st_uid
gid = st.st_gid
return (uid, gid)
def find_mount_point(self, path):
path = os.path.abspath(os.path.expanduser(os.path.expandvars(path)))
while not os.path.ismount(path):
path = os.path.dirname(path)
return path
def is_nfs_path(self, path):
"""
Returns a tuple containing (True, selinux_context) if the given path
is on a NFS mount point, otherwise the return will be (False, None).
"""
try:
f = open('/proc/mounts', 'r')
mount_data = f.readlines()
f.close()
except:
return (False, None)
path_mount_point = self.find_mount_point(path)
for line in mount_data:
(device, mount_point, fstype, options, rest) = line.split(' ', 4)
if path_mount_point == mount_point and 'nfs' in fstype:
nfs_context = self.selinux_context(path_mount_point)
return (True, nfs_context)
return (False, None)
def set_default_selinux_context(self, path, changed):
if not HAVE_SELINUX or not self.selinux_enabled():
return changed
context = self.selinux_default_context(path)
return self.set_context_if_different(path, context, False)
def set_context_if_different(self, path, context, changed):
if not HAVE_SELINUX or not self.selinux_enabled():
return changed
cur_context = self.selinux_context(path)
new_context = list(cur_context)
# Iterate over the current context instead of the
# argument context, which may have selevel.
(is_nfs, nfs_context) = self.is_nfs_path(path)
if is_nfs:
new_context = nfs_context
else:
for i in range(len(cur_context)):
if len(context) > i:
if context[i] is not None and context[i] != cur_context[i]:
new_context[i] = context[i]
if context[i] is None:
new_context[i] = cur_context[i]
if cur_context != new_context:
try:
if self.check_mode:
return True
rc = selinux.lsetfilecon(self._to_filesystem_str(path),
str(':'.join(new_context)))
except OSError:
self.fail_json(path=path, msg='invalid selinux context', new_context=new_context, cur_context=cur_context, input_was=context)
if rc != 0:
self.fail_json(path=path, msg='set selinux context failed')
changed = True
return changed
def set_owner_if_different(self, path, owner, changed):
path = os.path.expanduser(path)
if owner is None:
return changed
orig_uid, orig_gid = self.user_and_group(path)
try:
uid = int(owner)
except ValueError:
try:
uid = pwd.getpwnam(owner).pw_uid
except KeyError:
self.fail_json(path=path, msg='chown failed: failed to look up user %s' % owner)
if orig_uid != uid:
if self.check_mode:
return True
try:
os.lchown(path, uid, -1)
except OSError:
self.fail_json(path=path, msg='chown failed')
changed = True
return changed
def set_group_if_different(self, path, group, changed):
path = os.path.expanduser(path)
if group is None:
return changed
orig_uid, orig_gid = self.user_and_group(path)
try:
gid = int(group)
except ValueError:
try:
gid = grp.getgrnam(group).gr_gid
except KeyError:
self.fail_json(path=path, msg='chgrp failed: failed to look up group %s' % group)
if orig_gid != gid:
if self.check_mode:
return True
try:
os.lchown(path, -1, gid)
except OSError:
self.fail_json(path=path, msg='chgrp failed')
changed = True
return changed
def set_mode_if_different(self, path, mode, changed):
path = os.path.expanduser(path)
if mode is None:
return changed
try:
# FIXME: support English modes
if not isinstance(mode, int):
mode = int(mode, 8)
except Exception, e:
self.fail_json(path=path, msg='mode needs to be something octalish', details=str(e))
st = os.lstat(path)
prev_mode = stat.S_IMODE(st[stat.ST_MODE])
if prev_mode != mode:
if self.check_mode:
return True
# FIXME: comparison against string above will cause this to be executed
# every time
try:
if 'lchmod' in dir(os):
os.lchmod(path, mode)
else:
os.chmod(path, mode)
except OSError, e:
if os.path.islink(path) and e.errno == errno.EPERM: # Can't set mode on symbolic links
pass
elif e.errno == errno.ENOENT: # Can't set mode on broken symbolic links
pass
else:
raise e
except Exception, e:
self.fail_json(path=path, msg='chmod failed', details=str(e))
st = os.lstat(path)
new_mode = stat.S_IMODE(st[stat.ST_MODE])
if new_mode != prev_mode:
changed = True
return changed
def set_fs_attributes_if_different(self, file_args, changed):
# set modes owners and context as needed
changed = self.set_context_if_different(
file_args['path'], file_args['secontext'], changed
)
changed = self.set_owner_if_different(
file_args['path'], file_args['owner'], changed
)
changed = self.set_group_if_different(
file_args['path'], file_args['group'], changed
)
changed = self.set_mode_if_different(
file_args['path'], file_args['mode'], changed
)
return changed
def set_directory_attributes_if_different(self, file_args, changed):
return self.set_fs_attributes_if_different(file_args, changed)
def set_file_attributes_if_different(self, file_args, changed):
return self.set_fs_attributes_if_different(file_args, changed)
def add_path_info(self, kwargs):
'''
for results that are files, supplement the info about the file
in the return path with stats about the file path.
'''
path = kwargs.get('path', kwargs.get('dest', None))
if path is None:
return kwargs
if os.path.exists(path):
(uid, gid) = self.user_and_group(path)
kwargs['uid'] = uid
kwargs['gid'] = gid
try:
user = pwd.getpwuid(uid)[0]
except KeyError:
user = str(uid)
try:
group = grp.getgrgid(gid)[0]
except KeyError:
group = str(gid)
kwargs['owner'] = user
kwargs['group'] = group
st = os.lstat(path)
kwargs['mode'] = oct(stat.S_IMODE(st[stat.ST_MODE]))
# secontext not yet supported
if os.path.islink(path):
kwargs['state'] = 'link'
elif os.path.isdir(path):
kwargs['state'] = 'directory'
elif os.stat(path).st_nlink > 1:
kwargs['state'] = 'hard'
else:
kwargs['state'] = 'file'
if HAVE_SELINUX and self.selinux_enabled():
kwargs['secontext'] = ':'.join(self.selinux_context(path))
kwargs['size'] = st[stat.ST_SIZE]
else:
kwargs['state'] = 'absent'
return kwargs
def _check_locale(self):
'''
Uses the locale module to test the currently set locale
(per the LANG and LC_CTYPE environment settings)
'''
try:
# setting the locale to '' uses the default locale
# as it would be returned by locale.getdefaultlocale()
locale.setlocale(locale.LC_ALL, '')
except locale.Error, e:
# fallback to the 'C' locale, which may cause unicode
# issues but is preferable to simply failing because
# of an unknown locale
locale.setlocale(locale.LC_ALL, 'C')
os.environ['LANG'] = 'C'
os.environ['LC_CTYPE'] = 'C'
except Exception, e:
self.fail_json(msg="An unknown error was encountered while attempting to validate the locale: %s" % e)
def _handle_aliases(self):
aliases_results = {} #alias:canon
for (k,v) in self.argument_spec.iteritems():
self._legal_inputs.append(k)
aliases = v.get('aliases', None)
default = v.get('default', None)
required = v.get('required', False)
if default is not None and required:
# not alias specific but this is a good place to check this
self.fail_json(msg="internal error: required and default are mutally exclusive for %s" % k)
if aliases is None:
continue
if type(aliases) != list:
self.fail_json(msg='internal error: aliases must be a list')
for alias in aliases:
self._legal_inputs.append(alias)
aliases_results[alias] = k
if alias in self.params:
self.params[k] = self.params[alias]
return aliases_results
def _check_for_check_mode(self):
for (k,v) in self.params.iteritems():
if k == 'CHECKMODE':
if not self.supports_check_mode:
self.exit_json(skipped=True, msg="remote module does not support check mode")
if self.supports_check_mode:
self.check_mode = True
def _check_for_no_log(self):
for (k,v) in self.params.iteritems():
if k == 'NO_LOG':
self.no_log = self.boolean(v)
def _check_invalid_arguments(self):
for (k,v) in self.params.iteritems():
# these should be in legal inputs already
#if k in ('CHECKMODE', 'NO_LOG'):
# continue
if k not in self._legal_inputs:
self.fail_json(msg="unsupported parameter for module: %s" % k)
def _count_terms(self, check):
count = 0
for term in check:
if term in self.params:
count += 1
return count
def _check_mutually_exclusive(self, spec):
if spec is None:
return
for check in spec:
count = self._count_terms(check)
if count > 1:
self.fail_json(msg="parameters are mutually exclusive: %s" % check)
def _check_required_one_of(self, spec):
if spec is None:
return
for check in spec:
count = self._count_terms(check)
if count == 0:
self.fail_json(msg="one of the following is required: %s" % ','.join(check))
def _check_required_together(self, spec):
if spec is None:
return
for check in spec:
counts = [ self._count_terms([field]) for field in check ]
non_zero = [ c for c in counts if c > 0 ]
if len(non_zero) > 0:
if 0 in counts:
self.fail_json(msg="parameters are required together: %s" % check)
def _check_required_arguments(self):
''' ensure all required arguments are present '''
missing = []
for (k,v) in self.argument_spec.iteritems():
required = v.get('required', False)
if required and k not in self.params:
missing.append(k)
if len(missing) > 0:
self.fail_json(msg="missing required arguments: %s" % ",".join(missing))
def _check_argument_values(self):
''' ensure all arguments have the requested values, and there are no stray arguments '''
for (k,v) in self.argument_spec.iteritems():
choices = v.get('choices',None)
if choices is None:
continue
if type(choices) == list:
if k in self.params:
if self.params[k] not in choices:
choices_str=",".join([str(c) for c in choices])
msg="value of %s must be one of: %s, got: %s" % (k, choices_str, self.params[k])
self.fail_json(msg=msg)
else:
self.fail_json(msg="internal error: do not know how to interpret argument_spec")
def safe_eval(self, str, locals=None, include_exceptions=False):
# do not allow method calls to modules
if not isinstance(str, basestring):
# already templated to a datastructure, perhaps?
if include_exceptions:
return (str, None)
return str
if re.search(r'\w\.\w+\(', str):
if include_exceptions:
return (str, None)
return str
# do not allow imports
if re.search(r'import \w+', str):
if include_exceptions:
return (str, None)
return str
try:
result = None
if not locals:
result = _literal_eval(str)
else:
result = _literal_eval(str, None, locals)
if include_exceptions:
return (result, None)
else:
return result
except Exception, e:
if include_exceptions:
return (str, e)
return str
def _check_argument_types(self):
''' ensure all arguments have the requested type '''
for (k, v) in self.argument_spec.iteritems():
wanted = v.get('type', None)
if wanted is None:
continue
if k not in self.params:
continue
value = self.params[k]
is_invalid = False
if wanted == 'str':
if not isinstance(value, basestring):
self.params[k] = str(value)
elif wanted == 'list':
if not isinstance(value, list):
if isinstance(value, basestring):
self.params[k] = value.split(",")
elif isinstance(value, int) or isinstance(value, float):
self.params[k] = [ str(value) ]
else:
is_invalid = True
elif wanted == 'dict':
if not isinstance(value, dict):
if isinstance(value, basestring):
if value.startswith("{"):
try:
self.params[k] = json.loads(value)
except:
(result, exc) = self.safe_eval(value, dict(), include_exceptions=True)
if exc is not None:
self.fail_json(msg="unable to evaluate dictionary for %s" % k)
self.params[k] = result
elif '=' in value:
self.params[k] = dict([x.split("=", 1) for x in value.split(",")])
else:
self.fail_json(msg="dictionary requested, could not parse JSON or key=value")
else:
is_invalid = True
elif wanted == 'bool':
if not isinstance(value, bool):
if isinstance(value, basestring):
self.params[k] = self.boolean(value)
else:
is_invalid = True
elif wanted == 'int':
if not isinstance(value, int):
if isinstance(value, basestring):
self.params[k] = int(value)
else:
is_invalid = True
elif wanted == 'float':
if not isinstance(value, float):
if isinstance(value, basestring):
self.params[k] = float(value)
else:
is_invalid = True
else:
self.fail_json(msg="implementation error: unknown type %s requested for %s" % (wanted, k))
if is_invalid:
self.fail_json(msg="argument %s is of invalid type: %s, required: %s" % (k, type(value), wanted))
def _set_defaults(self, pre=True):
for (k,v) in self.argument_spec.iteritems():
default = v.get('default', None)
if pre == True:
# this prevents setting defaults on required items
if default is not None and k not in self.params:
self.params[k] = default
else:
# make sure things without a default still get set None
if k not in self.params:
self.params[k] = default
def _load_params(self):
''' read the input and return a dictionary and the arguments string '''
args = MODULE_ARGS
items = shlex.split(args)
params = {}
for x in items:
try:
(k, v) = x.split("=",1)
except Exception, e:
self.fail_json(msg="this module requires key=value arguments (%s)" % (items))
params[k] = v
params2 = json.loads(MODULE_COMPLEX_ARGS)
params2.update(params)
return (params2, args)
def _log_invocation(self):
''' log that ansible ran the module '''
# TODO: generalize a separate log function and make log_invocation use it
# Sanitize possible password argument when logging.
log_args = dict()
passwd_keys = ['password', 'login_password']
filter_re = [
# filter out things like user:pass@foo/whatever
# and http://username:pass@wherever/foo
re.compile('^(?P<before>.*:)(?P<password>.*)(?P<after>\@.*)$'),
]
for param in self.params:
canon = self.aliases.get(param, param)
arg_opts = self.argument_spec.get(canon, {})
no_log = arg_opts.get('no_log', False)
if no_log:
log_args[param] = 'NOT_LOGGING_PARAMETER'
elif param in passwd_keys:
log_args[param] = 'NOT_LOGGING_PASSWORD'
else:
found = False
for filter in filter_re:
if isinstance(self.params[param], unicode):
m = filter.match(self.params[param])
else:
m = filter.match(str(self.params[param]))
if m:
d = m.groupdict()
log_args[param] = d['before'] + "********" + d['after']
found = True
break
if not found:
log_args[param] = self.params[param]
module = 'ansible-%s' % os.path.basename(__file__)
msg = ''
for arg in log_args:
if isinstance(log_args[arg], basestring):
msg = msg + arg + '=' + log_args[arg].decode('utf-8') + ' '
else:
msg = msg + arg + '=' + str(log_args[arg]) + ' '
if msg:
msg = 'Invoked with %s' % msg
else:
msg = 'Invoked'
# 6655 - allow for accented characters
try:
msg = msg.encode('utf8')
except UnicodeDecodeError, e:
pass
if (has_journal):
journal_args = ["MESSAGE=%s %s" % (module, msg)]
journal_args.append("MODULE=%s" % os.path.basename(__file__))
for arg in log_args:
journal_args.append(arg.upper() + "=" + str(log_args[arg]))
try:
journal.sendv(*journal_args)
except IOError, e:
# fall back to syslog since logging to journal failed
syslog.openlog(str(module), 0, syslog.LOG_USER)
syslog.syslog(syslog.LOG_NOTICE, msg) #1
else:
syslog.openlog(str(module), 0, syslog.LOG_USER)
syslog.syslog(syslog.LOG_NOTICE, msg) #2
def _set_cwd(self):
try:
cwd = os.getcwd()
if not os.access(cwd, os.F_OK|os.R_OK):
raise
return cwd
except:
# we don't have access to the cwd, probably because of sudo.
# Try and move to a neutral location to prevent errors
for cwd in [os.path.expandvars('$HOME'), tempfile.gettempdir()]:
try:
if os.access(cwd, os.F_OK|os.R_OK):
os.chdir(cwd)
return cwd
except:
pass
# we won't error here, as it may *not* be a problem,
# and we don't want to break modules unnecessarily
return None
def get_bin_path(self, arg, required=False, opt_dirs=[]):
'''
find system executable in PATH.
Optional arguments:
- required: if executable is not found and required is true, fail_json
- opt_dirs: optional list of directories to search in addition to PATH
if found return full path; otherwise return None
'''
sbin_paths = ['/sbin', '/usr/sbin', '/usr/local/sbin']
paths = []
for d in opt_dirs:
if d is not None and os.path.exists(d):
paths.append(d)
paths += os.environ.get('PATH', '').split(os.pathsep)
bin_path = None
# mangle PATH to include /sbin dirs
for p in sbin_paths:
if p not in paths and os.path.exists(p):
paths.append(p)
for d in paths:
path = os.path.join(d, arg)
if os.path.exists(path) and self.is_executable(path):
bin_path = path
break
if required and bin_path is None:
self.fail_json(msg='Failed to find required executable %s' % arg)
return bin_path
def boolean(self, arg):
''' return a bool for the arg '''
if arg is None or type(arg) == bool:
return arg
if type(arg) in types.StringTypes:
arg = arg.lower()
if arg in BOOLEANS_TRUE:
return True
elif arg in BOOLEANS_FALSE:
return False
else:
self.fail_json(msg='Boolean %s not in either boolean list' % arg)
def jsonify(self, data):
for encoding in ("utf-8", "latin-1", "unicode_escape"):
try:
return json.dumps(data, encoding=encoding)
# Old systems using simplejson module does not support encoding keyword.
except TypeError, e:
return json.dumps(data)
except UnicodeDecodeError, e:
continue
self.fail_json(msg='Invalid unicode encoding encountered')
def from_json(self, data):
return json.loads(data)
def add_cleanup_file(self, path):
if path not in self.cleanup_files:
self.cleanup_files.append(path)
def do_cleanup_files(self):
for path in self.cleanup_files:
self.cleanup(path)
def exit_json(self, **kwargs):
''' return from the module, without error '''
self.add_path_info(kwargs)
if not 'changed' in kwargs:
kwargs['changed'] = False
self.do_cleanup_files()
print self.jsonify(kwargs)
sys.exit(0)
def fail_json(self, **kwargs):
''' return from the module, with an error message '''
self.add_path_info(kwargs)
assert 'msg' in kwargs, "implementation error -- msg to explain the error is required"
kwargs['failed'] = True
self.do_cleanup_files()
print self.jsonify(kwargs)
sys.exit(1)
def is_executable(self, path):
'''is the given path executable?'''
return (stat.S_IXUSR & os.stat(path)[stat.ST_MODE]
or stat.S_IXGRP & os.stat(path)[stat.ST_MODE]
or stat.S_IXOTH & os.stat(path)[stat.ST_MODE])
def digest_from_file(self, filename, digest_method):
''' Return hex digest of local file for a given digest_method, or None if file is not present. '''
if not os.path.exists(filename):
return None
if os.path.isdir(filename):
self.fail_json(msg="attempted to take checksum of directory: %s" % filename)
digest = digest_method
blocksize = 64 * 1024
infile = open(filename, 'rb')
block = infile.read(blocksize)
while block:
digest.update(block)
block = infile.read(blocksize)
infile.close()
return digest.hexdigest()
def md5(self, filename):
''' Return MD5 hex digest of local file using digest_from_file(). '''
return self.digest_from_file(filename, _md5())
def sha256(self, filename):
''' Return SHA-256 hex digest of local file using digest_from_file(). '''
if not HAVE_HASHLIB:
self.fail_json(msg="SHA-256 checksums require hashlib, which is available in Python 2.5 and higher")
return self.digest_from_file(filename, _sha256())
def backup_local(self, fn):
'''make a date-marked backup of the specified file, return True or False on success or failure'''
# backups named basename-YYYY-MM-DD@HH:MM~
ext = time.strftime("%Y-%m-%d@%H:%M~", time.localtime(time.time()))
backupdest = '%s.%s' % (fn, ext)
try:
shutil.copy2(fn, backupdest)
except shutil.Error, e:
self.fail_json(msg='Could not make backup of %s to %s: %s' % (fn, backupdest, e))
return backupdest
def cleanup(self, tmpfile):
if os.path.exists(tmpfile):
try:
os.unlink(tmpfile)
except OSError, e:
sys.stderr.write("could not cleanup %s: %s" % (tmpfile, e))
def atomic_move(self, src, dest):
'''atomically move src to dest, copying attributes from dest, returns true on success
it uses os.rename to ensure this as it is an atomic operation, rest of the function is
to work around limitations, corner cases and ensure selinux context is saved if possible'''
context = None
dest_stat = None
if os.path.exists(dest):
try:
dest_stat = os.stat(dest)
os.chmod(src, dest_stat.st_mode & 07777)
os.chown(src, dest_stat.st_uid, dest_stat.st_gid)
except OSError, e:
if e.errno != errno.EPERM:
raise
if self.selinux_enabled():
context = self.selinux_context(dest)
else:
if self.selinux_enabled():
context = self.selinux_default_context(dest)
creating = not os.path.exists(dest)
try:
login_name = os.getlogin()
except OSError:
# not having a tty can cause the above to fail, so
# just get the LOGNAME environment variable instead
login_name = os.environ.get('LOGNAME', None)
# if the original login_name doesn't match the currently
# logged-in user, or if the SUDO_USER environment variable
# is set, then this user has switched their credentials
switched_user = login_name and login_name != pwd.getpwuid(os.getuid())[0] or os.environ.get('SUDO_USER')
try:
# Optimistically try a rename, solves some corner cases and can avoid useless work, throws exception if not atomic.
os.rename(src, dest)
except (IOError,OSError), e:
# only try workarounds for errno 18 (cross device), 1 (not permited) and 13 (permission denied)
if e.errno != errno.EPERM and e.errno != errno.EXDEV and e.errno != errno.EACCES:
self.fail_json(msg='Could not replace file: %s to %s: %s' % (src, dest, e))
dest_dir = os.path.dirname(dest)
dest_file = os.path.basename(dest)
tmp_dest = tempfile.NamedTemporaryFile(
prefix=".ansible_tmp", dir=dest_dir, suffix=dest_file)
try: # leaves tmp file behind when sudo and not root
if switched_user and os.getuid() != 0:
# cleanup will happen by 'rm' of tempdir
# copy2 will preserve some metadata
shutil.copy2(src, tmp_dest.name)
else:
shutil.move(src, tmp_dest.name)
if self.selinux_enabled():
self.set_context_if_different(
tmp_dest.name, context, False)
tmp_stat = os.stat(tmp_dest.name)
if dest_stat and (tmp_stat.st_uid != dest_stat.st_uid or tmp_stat.st_gid != dest_stat.st_gid):
os.chown(tmp_dest.name, dest_stat.st_uid, dest_stat.st_gid)
os.rename(tmp_dest.name, dest)
except (shutil.Error, OSError, IOError), e:
self.cleanup(tmp_dest.name)
self.fail_json(msg='Could not replace file: %s to %s: %s' % (src, dest, e))
if creating:
# make sure the file has the correct permissions
# based on the current value of umask
umask = os.umask(0)
os.umask(umask)
os.chmod(dest, 0666 ^ umask)
if switched_user:
os.chown(dest, os.getuid(), os.getgid())
if self.selinux_enabled():
# rename might not preserve context
self.set_context_if_different(dest, context, False)
def run_command(self, args, check_rc=False, close_fds=False, executable=None, data=None, binary_data=False, path_prefix=None, cwd=None, use_unsafe_shell=False):
'''
Execute a command, returns rc, stdout, and stderr.
args is the command to run
If args is a list, the command will be run with shell=False.
If args is a string and use_unsafe_shell=False it will split args to a list and run with shell=False
If args is a string and use_unsafe_shell=True it run with shell=True.
Other arguments:
- check_rc (boolean) Whether to call fail_json in case of
non zero RC. Default is False.
- close_fds (boolean) See documentation for subprocess.Popen().
Default is False.
- executable (string) See documentation for subprocess.Popen().
Default is None.
'''
shell = False
if isinstance(args, list):
if use_unsafe_shell:
args = " ".join([pipes.quote(x) for x in args])
shell = True
elif isinstance(args, basestring) and use_unsafe_shell:
shell = True
elif isinstance(args, basestring):
args = shlex.split(args.encode('utf-8'))
else:
msg = "Argument 'args' to run_command must be list or string"
self.fail_json(rc=257, cmd=args, msg=msg)
# expand things like $HOME and ~
if not shell:
args = [ os.path.expandvars(os.path.expanduser(x)) for x in args ]
rc = 0
msg = None
st_in = None
# Set a temporart env path if a prefix is passed
env=os.environ
if path_prefix:
env['PATH']="%s:%s" % (path_prefix, env['PATH'])
# create a printable version of the command for use
# in reporting later, which strips out things like
# passwords from the args list
if isinstance(args, list):
clean_args = " ".join(pipes.quote(arg) for arg in args)
else:
clean_args = args
# all clean strings should return two match groups,
# where the first is the CLI argument and the second
# is the password/key/phrase that will be hidden
clean_re_strings = [
# this removes things like --password, --pass, --pass-wd, etc.
# optionally followed by an '=' or a space. The password can
# be quoted or not too, though it does not care about quotes
# that are not balanced
# source: http://blog.stevenlevithan.com/archives/match-quoted-string
r'([-]{0,2}pass[-]?(?:word|wd)?[=\s]?)((?:["\'])?(?:[^\s])*(?:\1)?)',
r'^(?P<before>.*:)(?P<password>.*)(?P<after>\@.*)$',
# TODO: add more regex checks here
]
for re_str in clean_re_strings:
r = re.compile(re_str)
clean_args = r.sub(r'\1********', clean_args)
if data:
st_in = subprocess.PIPE
kwargs = dict(
executable=executable,
shell=shell,
close_fds=close_fds,
stdin= st_in,
stdout=subprocess.PIPE,
stderr=subprocess.PIPE
)
if path_prefix:
kwargs['env'] = env
if cwd and os.path.isdir(cwd):
kwargs['cwd'] = cwd
# store the pwd
prev_dir = os.getcwd()
# make sure we're in the right working directory
if cwd and os.path.isdir(cwd):
try:
os.chdir(cwd)
except (OSError, IOError), e:
self.fail_json(rc=e.errno, msg="Could not open %s , %s" % (cwd, str(e)))
try:
cmd = subprocess.Popen(args, **kwargs)
if data:
if not binary_data:
data += '\n'
out, err = cmd.communicate(input=data)
rc = cmd.returncode
except (OSError, IOError), e:
self.fail_json(rc=e.errno, msg=str(e), cmd=clean_args)
except:
self.fail_json(rc=257, msg=traceback.format_exc(), cmd=clean_args)
if rc != 0 and check_rc:
msg = err.rstrip()
self.fail_json(cmd=clean_args, rc=rc, stdout=out, stderr=err, msg=msg)
# reset the pwd
os.chdir(prev_dir)
return (rc, out, err)
def append_to_file(self, filename, str):
filename = os.path.expandvars(os.path.expanduser(filename))
fh = open(filename, 'a')
fh.write(str)
fh.close()
def pretty_bytes(self,size):
ranges = (
(1<<70L, 'ZB'),
(1<<60L, 'EB'),
(1<<50L, 'PB'),
(1<<40L, 'TB'),
(1<<30L, 'GB'),
(1<<20L, 'MB'),
(1<<10L, 'KB'),
(1, 'Bytes')
)
for limit, suffix in ranges:
if size >= limit:
break
return '%.2f %s' % (float(size)/ limit, suffix)
def get_module_path():
return os.path.dirname(os.path.realpath(__file__))