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73 lines
2.3 KiB
73 lines
2.3 KiB
# -*- coding: utf-8 -*-
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# Copyright 2015-2016 Mir Calculate. http://www.calculate-linux.org
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import sys
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from os import path
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from calculate.lib.utils.mount import isMount
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from calculate.lib.utils.tools import Locker, LockError
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from calculate.lib.cl_lang import (setLocalTranslate, getLazyLocalTranslate)
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import random
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_ = lambda x: x
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setLocalTranslate('cl_builder3', sys.modules[__name__])
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__ = getLazyLocalTranslate(_)
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class DriveSpool():
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"""
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Объект содержит спул устройств на которые можно устанавливать систему
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"""
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spool_data = path.join('/run/calculate/drives_lock')
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def __init__(self, devices, shuffle=True):
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self.devices = devices
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if shuffle:
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random.shuffle(self.devices)
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self.devices = iter(self.devices)
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self.lockers = []
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@staticmethod
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def device_id(device_name):
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return device_name.replace('/', "_").lstrip("_")
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@staticmethod
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def check_device(device):
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if device.startswith("/dev"):
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return path.exists(device)
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return True
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def lock_device(self, device):
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if self.check_device(device) and not isMount(device):
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device_hash_fn = path.join(self.spool_data, self.device_id(device))
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locker = Locker(fn=device_hash_fn, timeout=0)
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try:
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locker.acquire()
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self.lockers.append(locker)
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return True
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except LockError:
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return False
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def get(self):
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for device in self.devices:
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if self.lock_device(device):
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return device
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return None
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def close(self):
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for locker in self.lockers:
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locker.remove()
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self.lockers = []
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