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# (c) 2016 RedHat
#
# 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 os
import re
import pipes
import ansible.constants as C
import time
import random
from ansible.compat.six import text_type
_USER_HOME_PATH_RE = re.compile(r'^~[_.A-Za-z0-9][-_.A-Za-z0-9]*$')
class ShellBase(object):
def __init__(self):
self.env = dict(
LANG = C.DEFAULT_MODULE_LANG,
LC_ALL = C.DEFAULT_MODULE_LANG,
LC_MESSAGES = C.DEFAULT_MODULE_LANG,
)
def env_prefix(self, **kwargs):
env = self.env.copy()
env.update(kwargs)
return ' '.join(['%s=%s' % (k, pipes.quote(text_type(v))) for k,v in env.items()])
def join_path(self, *args):
return os.path.join(*args)
# some shells (eg, powershell) are snooty about filenames/extensions, this lets the shell plugin have a say
def get_remote_filename(self, base_name):
return base_name.strip()
def path_has_trailing_slash(self, path):
return path.endswith('/')
def chmod(self, mode, path, recursive=True):
path = pipes.quote(path)
cmd = ['chmod', mode, path]
if recursive:
cmd.append('-R')
return ' '.join(cmd)
def chown(self, path, user, group=None, recursive=True):
path = pipes.quote(path)
user = pipes.quote(user)
if group is None:
cmd = ['chown', user, path]
else:
group = pipes.quote(group)
cmd = ['chown', '%s:%s' % (user, group), path]
if recursive:
cmd.append('-R')
return ' '.join(cmd)
def set_user_facl(self, path, user, mode, recursive=True):
"""Only sets acls for users as that's really all we need"""
path = pipes.quote(path)
mode = pipes.quote(mode)
user = pipes.quote(user)
cmd = ['setfacl']
if recursive:
cmd.append('-R')
cmd.extend(('-m', 'u:%s:%s %s' % (user, mode, path)))
return ' '.join(cmd)
def remove(self, path, recurse=False):
path = pipes.quote(path)
cmd = 'rm -f '
if recurse:
cmd += '-r '
return cmd + "%s %s" % (path, self._SHELL_REDIRECT_ALLNULL)
def mkdtemp(self, basefile=None, system=False, mode=None):
if not basefile:
basefile = 'ansible-tmp-%s-%s' % (time.time(), random.randint(0, 2**48))
basetmp = self.join_path(C.DEFAULT_REMOTE_TMP, basefile)
if system and (basetmp.startswith('$HOME') or basetmp.startswith('~/')):
basetmp = self.join_path('/tmp', basefile)
cmd = 'mkdir -p %s echo %s %s' % (self._SHELL_SUB_LEFT, basetmp, self._SHELL_SUB_RIGHT)
cmd += ' %s echo %s echo %s %s' % (self._SHELL_AND, self._SHELL_SUB_LEFT, basetmp, self._SHELL_SUB_RIGHT)
# change the umask in a subshell to achieve the desired mode
# also for directories created with `mkdir -p`
if mode:
tmp_umask = 0o777 & ~mode
cmd = '%s umask %o %s %s %s' % (self._SHELL_GROUP_LEFT, tmp_umask, self._SHELL_AND, cmd, self._SHELL_GROUP_RIGHT)
return cmd
def expand_user(self, user_home_path):
''' Return a command to expand tildes in a path
It can be either "~" or "~username". We use the POSIX definition of
a username:
http://pubs.opengroup.org/onlinepubs/000095399/basedefs/xbd_chap03.html#tag_03_426
http://pubs.opengroup.org/onlinepubs/000095399/basedefs/xbd_chap03.html#tag_03_276
'''
# Check that the user_path to expand is safe
if user_home_path != '~':
if not _USER_HOME_PATH_RE.match(user_home_path):
# pipes.quote will make the shell return the string verbatim
user_home_path = pipes.quote(user_home_path)
return 'echo %s' % user_home_path
def build_module_command(self, env_string, shebang, cmd, arg_path=None, rm_tmp=None):
# don't quote the cmd if it's an empty string, because this will break pipelining mode
if cmd.strip() != '':
cmd = pipes.quote(cmd)
cmd_parts = [env_string.strip(), shebang.replace("#!", "").strip(), cmd]
if arg_path is not None:
cmd_parts.append(arg_path)
new_cmd = " ".join(cmd_parts)
if rm_tmp:
new_cmd = '%s; rm -rf "%s" %s' % (new_cmd, rm_tmp, self._SHELL_REDIRECT_ALLNULL)
return new_cmd
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