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# -*- coding: utf-8 -*-
# command.py
# Copyright (C) 2015 LEAP
#
# This program 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.
#
# This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
"""
Utility to sanitize and run shell commands.
"""
import subprocess
def exec_validated_cmd(cmd, argument, validator=None):
"""
Executes cmd, validating argument with a validator function.
:param cmd: command.
:type dbname: str
:param argument: argument.
:type argument: str
:param validator: optional function to validate argument
:type validator: function
:return: exit code and stdout or stderr (if code != 0)
:rtype: (int, str)
"""
if validator and not validator(argument):
return 1, "invalid argument"
command = cmd.split(' ')
command.append(argument)
try:
process = subprocess.Popen(command, stdout=subprocess.PIPE,
stderr=subprocess.PIPE)
except OSError as e:
return 1, e
(out, err) = process.communicate()
code = process.wait()
if code is not 0:
return code, err
else:
return code, out
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