122 lines
3.7 KiB
Python
Executable File
122 lines
3.7 KiB
Python
Executable File
#!/usr/bin/python3
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# -*- coding: utf-8 -*-
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# Copyright (c) 2019 Huawei Technologies Co., Ltd.
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# A-Tune is licensed under the Mulan PSL v1.
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# You can use this software according to the terms and conditions of the Mulan PSL v1.
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# You may obtain a copy of Mulan PSL v1 at:
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# http://license.coscl.org.cn/MulanPSL
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# THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND, EITHER EXPRESS OR
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# IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT, MERCHANTABILITY OR FIT FOR A PARTICULAR
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# PURPOSE.
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# See the Mulan PSL v1 for more details.
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# Create: 2019-10-29
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"""
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The sub class of the Configurator, used to change the resources limit of user.
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"""
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import sys
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import logging
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import os
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import re
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import random
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import shutil
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if __name__ == "__main__":
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sys.path.insert(0, "./../../")
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from configurator.common import *
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logger = logging.getLogger(__name__)
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class Ulimit(Configurator):
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"""To change the resources limit of user"""
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_module = "ULIMIT"
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_submod = "ULIMIT"
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def __init__(self, user=None):
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Configurator.__init__(self, user)
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self.__cfg_file = "/etc/security/limits.conf"
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def _set(self, key, value):
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f = open(
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self.__cfg_file,
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mode='r+',
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buffering=-1,
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encoding=None,
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errors=None,
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newline=None,
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closefd=True)
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info = f.read()
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keyword = key.split(".")
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pattern = re.compile(
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"^\s*?(?!#)" +
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keyword[0] +
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"\s+?" +
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keyword[1] +
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"\s+?" +
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keyword[2] +
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"\s+(\w+)\s*?",
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re.ASCII | re.MULTILINE)
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searchObj = pattern.search(info)
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if searchObj is not None:
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offset = searchObj.span(1)
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file_modify(f, offset[0], offset[1] - 1, value)
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else:
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file_modify(f, len(info), -1, "\n{domain}\t{type}\t{item}\t{value}".format(
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domain=keyword[0], type=keyword[1], item=keyword[2], value=value))
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f.close()
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return 0
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def _get(self, key):
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with open(self.__cfg_file, 'r') as f:
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info = f.read()
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keyword = key.split(".")
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pattern = re.compile(
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"^\s*?(?!#)" +
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keyword[0] +
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"\s+?" +
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keyword[1] +
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"\s+?" +
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keyword[2] +
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"\s+(\w+)\s*?",
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re.ASCII | re.MULTILINE)
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searchObj = pattern.findall(info)
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if len(searchObj) == 0:
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err = GetConfigError("Fail to find {} config".format(key))
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logger.error(
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"{}.{}: {}".format(
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self.__class__.__name__,
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sys._getframe().f_code.co_name,
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str(err)))
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raise err
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return searchObj[-1]
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def _backup(self, key, rollback_info):
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name = os.path.basename(self.__cfg_file)
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bak_file = "{path}/{file}{ver}".format(path=rollback_info, file=name,
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ver=random.random())
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shutil.copy(self.__cfg_file, bak_file)
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return "CPI_ROLLBACK_INFO = {}".format(bak_file)
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def _resume(self, key, value):
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if key != "CPI_ROLLBACK_INFO":
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err = ValueError("unsupported resume type: {}".format(key))
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logger.error(
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"{}.{}: {}".format(
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self.__class__.__name__,
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sys._getframe().f_code.co_name,
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str(err)))
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raise err
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shutil.copy(value, self.__cfg_file)
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return None
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if __name__ == "__main__":
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if len(sys.argv) != 2:
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print('usage: ' + sys.argv[0] + ' key=value')
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sys.exit(-1)
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ct = Ulimit("UT")
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print(ct.set(sys.argv[1]))
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print(ct.get(ct._getcfg(sys.argv[1])[0]))
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