8e5fff7016
The 'exec_file' will now try to check for the headers inside the file, in case that it doesn't recognize the format or no format has been provided. Also the processing part of the user data now checks if the 'Content-Type' is in the file instead of checking if the file starts with the header, in order to comply with RFC2045. Change-Id: I53fda9f5c17f35cb35d93a86434ecc4c7c579802 Closes-Bug: #1623393 Closes-Bug: #1672222
98 lines
3.3 KiB
Python
98 lines
3.3 KiB
Python
# Copyright 2014 Cloudbase Solutions Srl
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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import collections
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import os
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import re
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from oslo_log import log as oslo_logging
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from cloudbaseinit.plugins.common import execcmd
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LOG = oslo_logging.getLogger(__name__)
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_Script = collections.namedtuple('Script', ['extension', 'script_type',
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'executor'])
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_SCRIPTS = (
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_Script(extension='cmd', executor=execcmd.Shell,
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script_type=re.compile(br'^rem\s+cmd\s')),
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_Script(script_type=re.compile(br'^#!\s*/usr/bin/env\s+python\s'),
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extension='py', executor=execcmd.Python),
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_Script(extension='exe', script_type=None, executor=execcmd.Shell),
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_Script(extension='sh', script_type=re.compile(br'^#!'),
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executor=execcmd.Bash),
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_Script(extension='ps1', executor=execcmd.PowershellSysnative,
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script_type=re.compile(br'^#(ps1|ps1_sysnative)\s')),
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_Script(extension=None, executor=execcmd.Powershell,
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script_type=re.compile(br'^#ps1_x86\s')),
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_Script(extension=None, executor=execcmd.EC2Config,
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script_type=re.compile(br'</?(script|powershell)>')))
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def _get_command(data, is_path=False):
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"""Returns a specific command executor if the data type is found.
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:param data: It can be either a file or content of user_data type.
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:param is_path: Determines whether :data: is a file path or it
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contains the user_data content.
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:rtype: An `execcmd` command type or `None`.
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.. note :: In case the data doesn't have a valid extension or
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header, it will return `None`.
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"""
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if is_path:
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extension = os.path.splitext(data)[1][1:].lower()
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for script in _SCRIPTS:
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if extension == script.extension:
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return script.executor(data)
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with open(data, 'rb') as file_handler:
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file_handler.seek(0)
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user_data = file_handler.read()
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else:
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user_data = data
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for script in _SCRIPTS:
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if script.script_type and script.script_type.search(user_data):
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return script.executor.from_data(user_data)
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return None
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def get_command(data):
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return _get_command(data)
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def get_command_from_path(path):
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return _get_command(path, is_path=True)
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def execute_user_data_script(user_data):
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ret_val = 0
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out = err = None
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command = get_command(user_data)
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if not command:
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LOG.warning('Unsupported user_data format')
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return ret_val
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try:
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out, err, ret_val = command.execute()
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except Exception as exc:
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LOG.warning('An error occurred during user_data execution: \'%s\'',
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exc)
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else:
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LOG.debug('User_data stdout:\n%s', out)
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LOG.debug('User_data stderr:\n%s', err)
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LOG.info('User_data script ended with return code: %d', ret_val)
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return ret_val
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