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# Copyright (c) 2019 Ansible Project
# GNU General Public License v3.0+ (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt)
from __future__ import (absolute_import, division, print_function)
__metaclass__ = type
DOCUMENTATION = '''
name: cmd
version_added: '2.8'
short_description: Windows Command Prompt
description:
- Used with the 'ssh' connection plugin and no C(DefaultShell) has been set on the Windows host.
extends_documentation_fragment:
- shell_windows
'''
import re
from ansible.plugins.shell.powershell import ShellModule as PSShellModule
# these are the metachars that have a special meaning in cmd that we want to escape when quoting
_find_unsafe = re.compile(r'[\s\(\)\%\!^\"\<\>\&\|]').search
class ShellModule(PSShellModule):
# Common shell filenames that this plugin handles
COMPATIBLE_SHELLS = frozenset() # type: frozenset[str]
# Family of shells this has. Must match the filename without extension
SHELL_FAMILY = 'cmd'
_SHELL_REDIRECT_ALLNULL = '>nul 2>&1'
_SHELL_AND = '&&'
# Used by various parts of Ansible to do Windows specific changes
_IS_WINDOWS = True
def quote(self, s):
# cmd does not support single quotes that the shlex_quote uses. We need to override the quoting behaviour to
# better match cmd.exe.
# https://blogs.msdn.microsoft.com/twistylittlepassagesallalike/2011/04/23/everyone-quotes-command-line-arguments-the-wrong-way/
# Return an empty argument
if not s:
return '""'
if _find_unsafe(s) is None:
return s
# Escape the metachars as we are quoting the string to stop cmd from interpreting that metachar. For example
# 'file &whoami.exe' would result in 'file $(whoami.exe)' instead of the literal string
# https://stackoverflow.com/questions/3411771/multiple-character-replace-with-python
for c in '^()%!"<>&|': # '^' must be the first char that we scan and replace
if c in s:
# I can't find any docs that explicitly say this but to escape ", it needs to be prefixed with \^.
s = s.replace(c, ("\\^" if c == '"' else "^") + c)
return '^"' + s + '^"'
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