adds two new plugins that use ansible-connection for persistence (#18572)

* adds new connection plugin `network_cli` which builds on paramiko
* adds new plugin `terminal` used for manipulating network_cli terminals
* adds new field to play_context `network_os` settable as ansible_network_os

This commit adds the plugins necesary to establish a persistent cli connection
to network devices of ssh.  It builds on the paramiko connection plugin
to create a shell environment that will persistent through ansible-connection.
The `newtork_cli` plugin then uses the network_os in the instance of
PlayContext to load the appropriate network OS environment plugin for
handling opening and closing of shells as well as privilege escalation.

lib/ansible/playbook/play_context.py

@@ -60,6 +60,7 @@ MAGIC_VARIABLE_MAPPING = dict(
    private_key_file = ('ansible_ssh_private_key_file', 'ansible_private_key_file'),
    pipelining       = ('ansible_ssh_pipelining', 'ansible_pipelining'),
    shell            = ('ansible_shell_type',),
+   network_os       = ('ansible_network_os',),
    become           = ('ansible_become',),
    become_method    = ('ansible_become_method',),
    become_user      = ('ansible_become_user',),
@@ -164,6 +165,7 @@ class PlayContext(Base):
     _private_key_file = FieldAttribute(isa='string', default=C.DEFAULT_PRIVATE_KEY_FILE)
     _timeout          = FieldAttribute(isa='int', default=C.DEFAULT_TIMEOUT)
     _shell            = FieldAttribute(isa='string')
+    _network_os       = FieldAttribute(isa='string')
     _ssh_args         = FieldAttribute(isa='string', default=C.ANSIBLE_SSH_ARGS)
     _ssh_common_args  = FieldAttribute(isa='string')
     _sftp_extra_args  = FieldAttribute(isa='string')

lib/ansible/plugins/__init__.py

@@ -509,3 +509,11 @@ strategy_loader = PluginLoader(
     'strategy_plugins',
     required_base_class='StrategyBase',
 )
+
+terminal_loader = PluginLoader(
+    'TerminalModule',
+    'ansible.plugins.terminal',
+    'terminal_plugins',
+    'terminal_plugins'
+)
+

lib/ansible/plugins/connection/network_cli.py

@@ -0,0 +1,190 @@
+#
+# (c) 2016 Red Hat Inc.
+#
+# 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 re
+import socket
+import json
+import signal
+import datetime
+
+from ansible.errors import AnsibleConnectionFailure
+from ansible.module_utils.six.moves import StringIO
+from ansible.plugins import terminal_loader
+from ansible.plugins.connection.paramiko_ssh import Connection as _Connection
+
+
+class Connection(_Connection):
+    ''' CLI SSH based connections on Paramiko '''
+
+    transport = 'network_cli'
+    has_pipelining = False
+
+    def __init__(self, play_context, new_stdin, *args, **kwargs):
+        super(Connection, self).__init__(play_context, new_stdin, *args, **kwargs)
+
+        assert self._play_context.network_os, 'ansible_network_os must be set'
+
+        self._terminal = terminal_loader.get(self._play_context.network_os, self)
+        if not self._terminal:
+            raise AnsibleConnectionFailure('network os %s is not supported' % self._play_context.network_os)
+
+        self._shell = None
+
+        self._matched_prompt = None
+        self._matched_pattern = None
+        self._last_response = None
+        self._history = list()
+
+    def update_play_context(self, play_context):
+        if self._play_context.become is False and play_context.become is True:
+            auth_pass = play_context.become_pass
+            self._terminal.on_authorize(passwd=auth_pass)
+
+        elif self._play_context.become is True and not play_context.become:
+            self._terminal.on_deauthorize()
+
+        self._play_context = play_context
+
+    def _connect(self):
+        super(Connection, self)._connect()
+        return (0, 'connected', '')
+
+    def open_shell(self, timeout=10):
+        self._shell = self.ssh.invoke_shell()
+        self._shell.settimeout(self._play_context.timeout)
+
+        self.receive()
+
+        if self._shell:
+            self._terminal.on_open_shell()
+
+        if hasattr(self._play_context, 'become'):
+            if self._play_context.become:
+                auth_pass = self._play_context.become_pass
+                self._terminal.on_authorize(passwd=auth_pass)
+
+    def close(self):
+        self.close_shell()
+        super(Connection, self).close()
+
+    def close_shell(self):
+        if self._shell:
+            self._terminal.on_close_shell()
+
+        if self._terminal.supports_multiplexing and self._shell:
+            self._shell.close()
+            self._shell = None
+
+        return (0, 'shell closed', '')
+
+    def receive(self, obj=None):
+        recv = StringIO()
+        handled = False
+
+        self._matched_prompt = None
+
+        while True:
+            data = self._shell.recv(256)
+
+            recv.write(data)
+            recv.seek(recv.tell() - 256)
+
+            window = self._strip(recv.read())
+
+            if obj and (obj.get('prompt') and not handled):
+                handled = self._handle_prompt(window, obj)
+
+            if self._find_prompt(window):
+                self._last_response = recv.getvalue()
+                resp = self._strip(self._last_response)
+                return self._sanitize(resp, obj)
+
+    def send(self, obj):
+        try:
+            command = obj['command']
+            self._history.append(command)
+            self._shell.sendall('%s\r' % command)
+            return self.receive(obj)
+        except (socket.timeout, AttributeError):
+            raise AnsibleConnectionFailure("timeout trying to send command: %s" % command.strip())
+
+    def _strip(self, data):
+        for regex in self._terminal.ansi_re:
+            data = regex.sub('', data)
+        return data
+
+    def _handle_prompt(self, resp, obj):
+        prompt = re.compile(obj['prompt'], re.I)
+        answer = obj['answer']
+        match = prompt.search(resp)
+        if match:
+            self._shell.sendall('%s\r' % answer)
+            return True
+
+    def _sanitize(self, resp, obj=None):
+        cleaned = []
+        command = obj.get('command') if obj else None
+        for line in resp.splitlines():
+            if (command and line.startswith(command.strip())) or self._find_prompt(line):
+                continue
+            cleaned.append(line)
+        return str("\n".join(cleaned)).strip()
+
+    def _find_prompt(self, response):
+        for regex in self._terminal.terminal_errors_re:
+            if regex.search(response):
+                raise AnsibleConnectionFailure(response)
+
+        for regex in self._terminal.terminal_prompts_re:
+            match = regex.search(response)
+            if match:
+                self._matched_pattern = regex.pattern
+                self._matched_prompt = match.group()
+                return True
+
+    def alarm_handler(self, signum, frame):
+        self.close_shell()
+
+    def exec_command(self, cmd):
+        ''' {'command': <str>, 'prompt': <str>, 'answer': <str>} '''
+
+        try:
+            obj = json.loads(cmd)
+        except ValueError:
+            obj = {'command': str(cmd).strip()}
+
+        if obj['command'] == 'close_shell()':
+            return self.close_shell()
+        elif obj['command'] == 'prompt()':
+            return (0, self._matched_prompt, '')
+        elif obj['command'] == 'history()':
+            return (0, self._history, '')
+
+        try:
+            if self._shell is None:
+                self.open_shell()
+        except AnsibleConnectionFailure as exc:
+            return (1, '', str(exc))
+
+        try:
+            out = self.send(obj)
+            return (0, out, '')
+        except (AnsibleConnectionFailure, ValueError) as exc:
+            return (1, '', str(exc))

lib/ansible/plugins/connection/paramiko_ssh.py

@@ -421,8 +421,9 @@ class Connection(ConnectionBase):
         SSH_CONNECTION_CACHE.pop(cache_key, None)
         SFTP_CONNECTION_CACHE.pop(cache_key, None)
 
-        if self.sftp is not None:
+        if hasattr(self, 'sftp'):
-            self.sftp.close()
+            if self.sftp is not None:
+                self.sftp.close()
 
         if C.HOST_KEY_CHECKING and C.PARAMIKO_RECORD_HOST_KEYS and self._any_keys_added():
 

lib/ansible/plugins/terminal/__init__.py

@@ -0,0 +1,71 @@
+#
+# (c) 2016 Red Hat Inc.
+#
+# 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 re
+
+from abc import ABCMeta, abstractmethod
+
+from ansible.compat.six import with_metaclass
+from ansible.errors import AnsibleConnectionFailure
+
+
+class TerminalBase(with_metaclass(ABCMeta, object)):
+    '''
+    A base class for implementing cli connections
+    '''
+
+    terminalprompts_re = []
+
+    terminalerrors_re = []
+
+    ansi_re = [
+        re.compile(r'(\x1b\[\?1h\x1b=)'),
+        re.compile(r'\x08.')
+    ]
+
+    supports_multiplexing = True
+
+    def __init__(self, connection):
+        self._connection = connection
+
+    def _exec_cli_command(self, cmd, check_rc=True):
+        rc, out, err = self._connection.exec_command(cmd)
+        if check_rc and rc != 0:
+            raise AnsibleConnectionFailure(err)
+        return rc, out, err
+
+    def _get_prompt(self):
+        for cmd in ['\n', 'prompt()']:
+            rc, out, err = self._exec_cli_command(cmd)
+        return out
+
+    def on_open_shell(self):
+        pass
+
+    def on_close_shell(self):
+        pass
+
+    def on_authorize(self, passwd=None):
+        pass
+
+    def on_deauthorize(self):
+        pass
+

lib/ansible/plugins/terminal/asa.py

@@ -0,0 +1,75 @@
+#
+# (c) 2016 Red Hat Inc.
+#
+# 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 re
+import json
+
+from ansible.plugins.terminal import TerminalBase
+from ansible.errors import AnsibleConnectionFailure
+
+
+class TerminalModule(TerminalBase):
+
+    terminal_prompts_re = [
+        re.compile(r"[\r\n]?[\w+\-\.:\/\[\]]+(?:\([^\)]+\)){,3}(?:>|#) ?$"),
+        re.compile(r"\[\w+\@[\w\-\.]+(?: [^\]])\] ?[>#\$] ?$")
+    ]
+
+    terminal_errors_re = [
+        re.compile(r"% ?Error"),
+        re.compile(r"^% \w+", re.M),
+        re.compile(r"% ?Bad secret"),
+        re.compile(r"invalid input", re.I),
+        re.compile(r"(?:incomplete|ambiguous) command", re.I),
+        re.compile(r"connection timed out", re.I),
+        re.compile(r"[^\r\n]+ not found", re.I),
+        re.compile(r"'[^']' +returned error code: ?\d+"),
+    ]
+
+    def authorize(self, passwd=None):
+        if self._get_prompt().endswith('#'):
+            return
+
+        cmd = {'command': 'enable'}
+        if passwd:
+            cmd['prompt'] = r"[\r\n]?password: $"
+            cmd['answer'] = passwd
+
+        try:
+            self._exec_cli_command(json.dumps(cmd))
+            self._exec_cli_command('terminal pager 0')
+        except AnsibleConnectionFailure:
+            raise AnsibleConnectionFailure('unable to elevate privilege to enable mode')
+
+    def on_deauthorize(self):
+        prompt = self._get_prompt()
+        if prompt is None:
+            # if prompt is None most likely the terminal is hung up at a prompt
+            return
+
+        if '(config' in prompt:
+            self._exec_cli_command('end')
+            self._exec_cli_command('disable')
+
+        elif prompt.endswith('#'):
+            self._exec_cli_command('disable')
+
+

lib/ansible/plugins/terminal/eos.py

@@ -0,0 +1,82 @@
+#
+# (c) 2016 Red Hat Inc.
+#
+# 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 re
+import json
+
+from ansible.plugins.terminal import TerminalBase
+from ansible.errors import AnsibleConnectionFailure
+
+
+class TerminalModule(TerminalBase):
+
+    terminal_prompts_re = [
+        re.compile(r"[\r\n]?[\w+\-\.:\/\[\]]+(?:\([^\)]+\)){,3}(?:>|#) ?$"),
+        re.compile(r"\[\w+\@[\w\-\.]+(?: [^\]])\] ?[>#\$] ?$")
+    ]
+
+    terminal_errors_re = [
+        re.compile(r"% ?Error"),
+        re.compile(r"^% \w+", re.M),
+        re.compile(r"% User not present"),
+        re.compile(r"% ?Bad secret"),
+        re.compile(r"invalid input", re.I),
+        re.compile(r"(?:incomplete|ambiguous) command", re.I),
+        re.compile(r"connection timed out", re.I),
+        re.compile(r"[^\r\n]+ not found", re.I),
+        re.compile(r"'[^']' +returned error code: ?\d+"),
+        re.compile(r"[^\r\n]\/bin\/(?:ba)?sh")
+    ]
+
+    def on_open_shell(self):
+        try:
+            self._exec_cli_command('terminal length 0')
+        except AnsibleConnectionFailure:
+            raise AnsibleConnectionFailure('unable to set terminal parameters')
+
+    def on_authorize(self, passwd=None):
+        if self._get_prompt().endswith('#'):
+            return
+
+        cmd = {'command': 'enable'}
+        if passwd:
+            cmd['prompt'] = r"[\r\n]?password: $"
+            cmd['answer'] = passwd
+
+        try:
+            self._exec_cli_command(json.dumps(cmd))
+        except AnsibleConnectionFailure:
+            raise AnsibleConnectionFailure('unable to elevate privilege to enable mode')
+
+    def on_deauthorize(self):
+        prompt = self._get_prompt()
+        if prompt is None:
+            # if prompt is None most likely the terminal is hung up at a prompt
+            return
+
+        if '(config' in prompt:
+            self._exec_cli_command('end')
+            self._exec_cli_command('disable')
+
+        elif prompt.endswith('#'):
+            self._exec_cli_command('disable')
+
+

lib/ansible/plugins/terminal/ios.py

@@ -0,0 +1,82 @@
+#
+# (c) 2016 Red Hat Inc.
+#
+# 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 re
+import json
+
+from ansible.plugins.terminal import TerminalBase
+from ansible.errors import AnsibleConnectionFailure
+
+
+class TerminalModule(TerminalBase):
+
+    terminal_prompts_re = [
+        re.compile(r"[\r\n]?[\w+\-\.:\/\[\]]+(?:\([^\)]+\)){,3}(?:>|#) ?$"),
+        re.compile(r"\[\w+\@[\w\-\.]+(?: [^\]])\] ?[>#\$] ?$")
+    ]
+
+    terminal_errors_re = [
+        re.compile(r"% ?Error"),
+        re.compile(r"^% \w+", re.M),
+        re.compile(r"% ?Bad secret"),
+        re.compile(r"invalid input", re.I),
+        re.compile(r"(?:incomplete|ambiguous) command", re.I),
+        re.compile(r"connection timed out", re.I),
+        re.compile(r"[^\r\n]+ not found", re.I),
+        re.compile(r"'[^']' +returned error code: ?\d+"),
+    ]
+
+    supports_multiplexing = False
+
+    def on_open_shell(self):
+        try:
+            self._exec_cli_command('terminal length 0')
+        except AnsibleConnectionFailure:
+            raise AnsibleConnectionFailure('unable to set terminal parameters')
+
+    def on_authorize(self, passwd=None):
+        if self._get_prompt().endswith('#'):
+            return
+
+        cmd = {'command': 'enable'}
+        if passwd:
+            cmd['prompt'] = r"[\r\n]?password: $"
+            cmd['answer'] = passwd
+
+        try:
+            self._exec_cli_command(json.dumps(cmd))
+        except AnsibleConnectionFailure:
+            raise AnsibleConnectionFailure('unable to elevate privilege to enable mode')
+
+    def on_deauthorize(self):
+        prompt = self._get_prompt()
+        if prompt is None:
+            # if prompt is None most likely the terminal is hung up at a prompt
+            return
+
+        if '(config' in prompt:
+            self._exec_cli_command('end')
+            self._exec_cli_command('disable')
+
+        elif prompt.endswith('#'):
+            self._exec_cli_command('disable')
+
+

lib/ansible/plugins/terminal/iosxr.py

@@ -0,0 +1,55 @@
+#
+# (c) 2016 Red Hat Inc.
+#
+# 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 re
+import json
+
+from ansible.plugins.terminal import TerminalBase
+from ansible.errors import AnsibleConnectionFailure
+
+
+class TerminalModule(TerminalBase):
+
+    terminal_prompts_re = [
+        re.compile(r"[\r\n]?[\w+\-\.:\/\[\]]+(?:\([^\)]+\)){,3}(?:>|#) ?$"),
+        re.compile(r"\[\w+\@[\w\-\.]+(?: [^\]])\] ?[>#\$] ?$")
+    ]
+
+    terminal_errors_re = [
+        re.compile(r"% ?Error"),
+        re.compile(r"% ?Bad secret"),
+        re.compile(r"invalid input", re.I),
+        re.compile(r"(?:incomplete|ambiguous) command", re.I),
+        re.compile(r"connection timed out", re.I),
+        re.compile(r"[^\r\n]+ not found", re.I),
+        re.compile(r"'[^']' +returned error code: ?\d+"),
+    ]
+
+    supports_multiplexing = False
+
+    def on_open_shell(self):
+        try:
+            for cmd in ['terminal length 0', 'terminal exec prompt no-timestamp']:
+                self._connection.exec_command(cmd)
+        except AnsibleConnectionFailure:
+            raise AnsibleConnectionFailure('unable to set terminal parameters')
+
+

lib/ansible/plugins/terminal/junos.py

@@ -0,0 +1,47 @@
+#
+# (c) 2016 Red Hat Inc.
+#
+# 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 re
+
+from ansible.plugins.terminal import TerminalBase
+from ansible.errors import AnsibleConnectionFailure
+
+
+class TerminalModule(TerminalBase):
+
+    terminal_prompts_re = [
+        re.compile(r"[\r\n]?[\w+\-\.:\/\[\]]+(?:\([^\)]+\)){,3}(?:>|#) ?$"),
+        re.compile(r"[\r\n]?[\w+\-\.:\/\[\]]+(?:\([^\)]+\)){,3}(?:>|#) ?$"),
+    ]
+
+    terminal_errors_re = [
+        re.compile(r"unknown command"),
+        re.compile(r"syntax error,")
+    ]
+
+    def on_open_shell(self):
+        try:
+            for c in ['set cli timestamp disable', 'set cli screen-length 0']:
+                self._exec_cli_command(c)
+        except AnsibleConnectionFailure:
+            raise AnsibleConnectionFailure('unable to set terminal parameters')
+

lib/ansible/plugins/terminal/nxos.py

@@ -0,0 +1,56 @@
+#
+# (c) 2016 Red Hat Inc.
+#
+# 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 re
+
+from ansible.plugins.terminal import TerminalBase
+from ansible.errors import AnsibleConnectionFailure
+
+
+class TerminalModule(TerminalBase):
+
+    terminal_prompts_re = [
+        re.compile(r'[\r\n]?[a-zA-Z]{1}[a-zA-Z0-9-]*[>|#|%](?:\s*)$'),
+        re.compile(r'[\r\n]?[a-zA-Z]{1}[a-zA-Z0-9-]*\(.+\)#(?:\s*)$')
+    ]
+
+    terminal_errors_re = [
+        re.compile(r"% ?Error"),
+        re.compile(r"^% \w+", re.M),
+        re.compile(r"% ?Bad secret"),
+        re.compile(r"invalid input", re.I),
+        re.compile(r"(?:incomplete|ambiguous) command", re.I),
+        re.compile(r"connection timed out", re.I),
+        re.compile(r"[^\r\n]+ not found", re.I),
+        re.compile(r"'[^']' +returned error code: ?\d+"),
+        re.compile(r"syntax error"),
+        re.compile(r"unknown command"),
+        re.compile(r"user not present")
+    ]
+
+    def on_open_shell(self):
+        try:
+            self._exec_cli_command('terminal length 0')
+        except AnsibleConnectionFailure:
+            raise AnsibleConnectionFailure('unable to set terminal parameters')
+
+
+

lib/ansible/plugins/terminal/sros.py

@@ -0,0 +1,46 @@
+#
+# (c) 2016 Red Hat Inc.
+#
+# 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 re
+import json
+
+from ansible.plugins.terminal import TerminalBase
+from ansible.errors import AnsibleConnectionFailure
+
+
+class TerminalModule(TerminalBase):
+
+    terminal_prompts_re = [
+        re.compile(r"[\r\n]?[\w+\-\.:\/\[\]]+(?:\([^\)]+\)){,3}(?:>|#) ?$"),
+        re.compile(r"\[\w+\@[\w\-\.]+(?: [^\]])\] ?[>#\$] ?$")
+    ]
+
+    terminal_errors_re = [
+        re.compile(r"^\r\nError:"),
+    ]
+
+    supports_multiplexing = False
+
+    def on_open_shell(self):
+        try:
+            self._exec_cli_command('environment no more')
+        except AnsibleConnectionFailure:
+            raise AnsibleConnectionFailure('unable to set terminal parameters')

lib/ansible/plugins/terminal/vyos.py

@@ -0,0 +1,47 @@
+#
+# (c) 2016 Red Hat Inc.
+#
+# 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 re
+
+from ansible.plugins.terminal import TerminalBase
+from ansible.errors import AnsibleConnectionFailure
+
+
+class TerminalModule(TerminalBase):
+
+    terminal_prompts_re = [
+        re.compile(r"[\r\n]?[\w+\-\.:\/\[\]]+(?:\([^\)]+\)){,3}(?:>|#) ?$"),
+        re.compile(r"\@[\w\-\.]+:\S+?[>#\$] ?$")
+    ]
+
+    terminal_errors_re = [
+        re.compile(r"\n\s*Invalid command:"),
+        re.compile(r"\nCommit failed"),
+        re.compile(r"\n\s+Set failed"),
+    ]
+
+    def on_open_shell(self):
+        try:
+            self._exec_cli_command('set terminal length 0')
+        except AnsibleConnectionFailure:
+            raise AnsibleConnectionFailure('unable to set terminal parameters')
+
+