102 lines
3.6 KiB
Python
102 lines
3.6 KiB
Python
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# -*- coding: utf-8 -*-
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#
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# (c) 2016, Yanis Guenane <yanis+ansible@guenane.org>
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#
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# Ansible is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# Ansible is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with Ansible. If not, see <http://www.gnu.org/licenses/>.
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from __future__ import absolute_import, division, print_function
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__metaclass__ = type
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import errno
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import os
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import tempfile
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def load_file_if_exists(path, module=None, ignore_errors=False):
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'''
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Load the file as a bytes string. If the file does not exist, ``None`` is returned.
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If ``ignore_errors`` is ``True``, will ignore errors. Otherwise, errors are
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raised as exceptions if ``module`` is not specified, and result in ``module.fail_json``
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being called when ``module`` is specified.
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'''
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try:
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with open(path, 'rb') as f:
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return f.read()
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except EnvironmentError as exc:
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if exc.errno == errno.ENOENT:
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return None
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if ignore_errors:
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return None
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if module is None:
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raise
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module.fail_json('Error while loading {0} - {1}'.format(path, str(exc)))
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except Exception as exc:
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if ignore_errors:
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return None
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if module is None:
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raise
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module.fail_json('Error while loading {0} - {1}'.format(path, str(exc)))
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def write_file(module, content, default_mode=None, path=None):
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'''
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Writes content into destination file as securely as possible.
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Uses file arguments from module.
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'''
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# Find out parameters for file
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try:
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file_args = module.load_file_common_arguments(module.params, path=path)
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except TypeError:
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# The path argument is only supported in Ansible 2.10+. Fall back to
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# pre-2.10 behavior of module_utils/crypto.py for older Ansible versions.
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file_args = module.load_file_common_arguments(module.params)
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if path is not None:
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file_args['path'] = path
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if file_args['mode'] is None:
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file_args['mode'] = default_mode
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# Create tempfile name
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tmp_fd, tmp_name = tempfile.mkstemp(prefix=b'.ansible_tmp')
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try:
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os.close(tmp_fd)
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except Exception:
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pass
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module.add_cleanup_file(tmp_name) # if we fail, let Ansible try to remove the file
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try:
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try:
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# Create tempfile
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file = os.open(tmp_name, os.O_WRONLY | os.O_CREAT | os.O_TRUNC, 0o600)
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os.write(file, content)
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os.close(file)
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except Exception as e:
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try:
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os.remove(tmp_name)
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except Exception:
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pass
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module.fail_json(msg='Error while writing result into temporary file: {0}'.format(e))
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# Update destination to wanted permissions
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if os.path.exists(file_args['path']):
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module.set_fs_attributes_if_different(file_args, False)
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# Move tempfile to final destination
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module.atomic_move(tmp_name, file_args['path'])
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# Try to update permissions again
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module.set_fs_attributes_if_different(file_args, False)
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except Exception as e:
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try:
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os.remove(tmp_name)
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except Exception:
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pass
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module.fail_json(msg='Error while writing result: {0}'.format(e))
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