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| \/ | \ \ / / | __ \ (_) | | / ____| | | | |
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| |\/| | '__|> < | ___/ '__| \ \ / / _` | __/ _ \ \___ \| '_ \ / _ \ | |
| | | | |_ / . \ | | | | | |\ V / (_| | || __/ ____) | | | | __/ | |
|_| |_|_(_)_/ \_\ |_| |_| |_| \_/ \__,_|\__\___| |_____/|_| |_|\___V 2.1
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# (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