/*
 * Copyright 2012-2014 inBloom, Inc. and its affiliates.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
import re
class FreeMemory:
    def __init__(self, agentConfig, checksLogger, rawConfig):
                self.agentConfig = agentConfig
                self.checksLogger = checksLogger
                self.rawConfig = rawConfig

    def run(self):
        data = { }
        for line in open("/proc/meminfo"):
            if "MemFree" in line:
                data['MemFree'] = int(re.findall('\d+', line)[0])
            elif "Buffers" in line:
                data['Buffers'] = int(re.findall('\d+', line)[0])
            elif re.match('^Cached', line):
                data['Cached'] = int(re.findall('\d+', line)[0])
        data['AvailableMemory'] = data['MemFree'] + data['Buffers'] + data['Cached']
        return data

/*
 * Copyright 2012-2014 inBloom, Inc. and its affiliates.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
import re
class FreeMemory:
    def __init__(self, agentConfig, checksLogger, rawConfig):
                self.agentConfig = agentConfig
                self.checksLogger = checksLogger
                self.rawConfig = rawConfig

    def run(self):
        data = { }
        with open("/proc/meminfo") as fd:
            for line in fd:
                if "MemFree" in line:
                    data['MemFree'] = int(re.findall('\d+', line)[0])
                elif "Buffers" in line:
                    data['Buffers'] = int(re.findall('\d+', line)[0])
                elif re.match('^Cached', line):
                    data['Cached'] = int(re.findall('\d+', line)[0])
        data['AvailableMemory'] = data['MemFree'] + data['Buffers'] + data['Cached']
        return data

Fix to ensure we dont leave any open file handles laying around