1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
|
# (c) 2012-2014, Michael DeHaan <michael.dehaan@gmail.com>
#
# This file is part of Ansible
#
# Ansible is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# Ansible is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with Ansible. If not, see <http://www.gnu.org/licenses/>.
from __future__ import (absolute_import, division, print_function)
__metaclass__ = type
import os
import shutil
from errno import EEXIST
from ansible.errors import AnsibleError
from ansible.module_utils._text import to_bytes, to_native, to_text
__all__ = ['unfrackpath', 'makedirs_safe']
def unfrackpath(path, follow=True, basedir=None):
'''
Returns a path that is free of symlinks (if follow=True), environment variables, relative path traversals and symbols (~)
:arg path: A byte or text string representing a path to be canonicalized
:arg follow: A boolean to indicate of symlinks should be resolved or not
:raises UnicodeDecodeError: If the canonicalized version of the path
contains non-utf8 byte sequences.
:rtype: A text string (unicode on pyyhon2, str on python3).
:returns: An absolute path with symlinks, environment variables, and tilde
expanded. Note that this does not check whether a path exists.
example::
'$HOME/../../var/mail' becomes '/var/spool/mail'
'''
b_basedir = to_bytes(basedir, errors='surrogate_or_strict', nonstring='passthru')
if b_basedir is None:
b_basedir = to_bytes(os.getcwd(), errors='surrogate_or_strict')
elif os.path.isfile(b_basedir):
b_basedir = os.path.dirname(b_basedir)
b_final_path = os.path.expanduser(os.path.expandvars(to_bytes(path, errors='surrogate_or_strict')))
if not os.path.isabs(b_final_path):
b_final_path = os.path.join(b_basedir, b_final_path)
if follow:
b_final_path = os.path.realpath(b_final_path)
return to_text(os.path.normpath(b_final_path), errors='surrogate_or_strict')
def makedirs_safe(path, mode=None):
'''
A *potentially insecure* way to ensure the existence of a directory chain. The "safe" in this function's name
refers only to its ability to ignore `EEXIST` in the case of multiple callers operating on the same part of
the directory chain. This function is not safe to use under world-writable locations when the first level of the
path to be created contains a predictable component. Always create a randomly-named element first if there is any
chance the parent directory might be world-writable (eg, /tmp) to prevent symlink hijacking and potential
disclosure or modification of sensitive file contents.
:arg path: A byte or text string representing a directory chain to be created
:kwarg mode: If given, the mode to set the directory to
:raises AnsibleError: If the directory cannot be created and does not already exist.
:raises UnicodeDecodeError: if the path is not decodable in the utf-8 encoding.
'''
rpath = unfrackpath(path)
b_rpath = to_bytes(rpath)
if not os.path.exists(b_rpath):
try:
if mode:
os.makedirs(b_rpath, mode)
else:
os.makedirs(b_rpath)
except OSError as e:
if e.errno != EEXIST:
raise AnsibleError("Unable to create local directories(%s): %s" % (to_native(rpath), to_native(e)))
def basedir(source):
""" returns directory for inventory or playbook """
source = to_bytes(source, errors='surrogate_or_strict')
dname = None
if os.path.isdir(source):
dname = source
elif source in [None, '', '.']:
dname = os.getcwd()
elif os.path.isfile(source):
dname = os.path.dirname(source)
if dname:
# don't follow symlinks for basedir, enables source re-use
dname = os.path.abspath(dname)
return to_text(dname, errors='surrogate_or_strict')
def cleanup_tmp_file(path, warn=False):
"""
Removes temporary file or directory. Optionally display a warning if unable
to remove the file or directory.
:arg path: Path to file or directory to be removed
:kwarg warn: Whether or not to display a warning when the file or directory
cannot be removed
"""
try:
if os.path.exists(path):
try:
if os.path.isdir(path):
shutil.rmtree(path)
elif os.path.isfile(path):
os.unlink(path)
except Exception as e:
if warn:
# Importing here to avoid circular import
from ansible.utils.display import Display
display = Display()
display.display(u'Unable to remove temporary file {0}'.format(to_text(e)))
except Exception:
pass
def is_subpath(child, parent, real=False):
"""
Compares paths to check if one is contained in the other
:arg: child: Path to test
:arg parent; Path to test against
"""
test = False
abs_child = unfrackpath(child, follow=False)
abs_parent = unfrackpath(parent, follow=False)
if real:
abs_child = os.path.realpath(abs_child)
abs_parent = os.path.realpath(abs_parent)
c = abs_child.split(os.path.sep)
p = abs_parent.split(os.path.sep)
try:
test = c[:len(p)] == p
except IndexError:
# child is shorter than parent so cannot be subpath
pass
return test
|
