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67 lines
2.2 KiB
Python
67 lines
2.2 KiB
Python
# (c) 2016, James Tanner
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# (c) 2016, Toshio Kuratomi <tkuratomi@ansible.com>
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#
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# This file is part of Ansible
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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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# Make coding more python3-ish
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from __future__ import (absolute_import, division, print_function)
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__metaclass__ = type
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import subprocess
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from ansible import constants as C
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from ansible.module_utils._text import to_bytes
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from ansible.module_utils.compat.paramiko import paramiko
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_HAS_CONTROLPERSIST = {} # type: dict[str, bool]
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def check_for_controlpersist(ssh_executable):
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try:
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# If we've already checked this executable
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return _HAS_CONTROLPERSIST[ssh_executable]
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except KeyError:
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pass
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b_ssh_exec = to_bytes(ssh_executable, errors='surrogate_or_strict')
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has_cp = True
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try:
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cmd = subprocess.Popen([b_ssh_exec, '-o', 'ControlPersist'], stdout=subprocess.PIPE, stderr=subprocess.PIPE)
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(out, err) = cmd.communicate()
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if b"Bad configuration option" in err or b"Usage:" in err:
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has_cp = False
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except OSError:
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has_cp = False
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_HAS_CONTROLPERSIST[ssh_executable] = has_cp
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return has_cp
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# TODO: move to 'smart' connection plugin that subclasses to ssh/paramiko as needed.
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def set_default_transport():
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# deal with 'smart' connection .. one time ..
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if C.DEFAULT_TRANSPORT == 'smart':
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# TODO: check if we can deprecate this as ssh w/o control persist should
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# not be as common anymore.
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# see if SSH can support ControlPersist if not use paramiko
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if not check_for_controlpersist('ssh') and paramiko is not None:
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C.DEFAULT_TRANSPORT = "paramiko"
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else:
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C.DEFAULT_TRANSPORT = "ssh"
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