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adds connection module to module_utils #21310

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Feb 12, 2017
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75 changes: 75 additions & 0 deletions lib/ansible/module_utils/connection.py
Original file line number Diff line number Diff line change
@@ -0,0 +1,75 @@
#
# This code is part of Ansible, but is an independent component.
# This particular file snippet, and this file snippet only, is BSD licensed.
# Modules you write using this snippet, which is embedded dynamically by Ansible
# still belong to the author of the module, and may assign their own license
# to the complete work.
#
# (c) 2017 Red Hat Inc.
#
# Redistribution and use in source and binary forms, with or without modification,
# are permitted provided that the following conditions are met:
#
# * Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# * Redistributions in binary form must reproduce the above copyright notice,
# this list of conditions and the following disclaimer in the documentation
# and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
# IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
# PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
# USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#
import socket
import struct
import signal

from ansible.module_utils.basic import get_exception
from ansible.module_utils._text import to_bytes, to_native

def send_data(s, data):
packed_len = struct.pack('!Q',len(data))
return s.sendall(packed_len + data)

def recv_data(s):
header_len = 8 # size of a packed unsigned long long
data = to_bytes("")
while len(data) < header_len:
d = s.recv(header_len - len(data))
if not d:
return None
data += d
data_len = struct.unpack('!Q',data[:header_len])[0]
data = data[header_len:]
while len(data) < data_len:
d = s.recv(data_len - len(data))
if not d:
return None
data += d
return data

def exec_command(module, command):
try:
sf = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
sf.connect(module._socket_path)

data = "EXEC: %s" % command
send_data(sf, to_bytes(data.strip()))

rc = int(recv_data(sf), 10)
stdout = recv_data(sf)
stderr = recv_data(sf)
except socket.error:
exc = get_exception()
sf.close()
module.fail_json(msg='unable to connect to socket', err=str(exc))

sf.close()

return (rc, to_native(stdout), to_native(stderr))