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# -*- coding: utf-8 -*- |
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# |
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# This file is part of Glances. |
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# |
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# Copyright (C) 2019 Nicolargo <[email protected]> |
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# |
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# Glances is free software; you can redistribute it and/or modify |
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# it under the terms of the GNU Lesser General Public License as published by |
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# the Free Software Foundation, either version 3 of the License, or |
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# (at your option) any later version. |
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# |
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# Glances is distributed in the hope that it will be useful, |
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# but WITHOUT ANY WARRANTY; without even the implied warranty of |
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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# GNU Lesser General Public License for more details. |
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# |
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# You should have received a copy of the GNU Lesser General Public License |
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# along with this program. If not, see <http://www.gnu.org/licenses/>. |
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# |
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"""Init the Glances software.""" |
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# Import system libs |
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import locale |
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import platform |
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import signal |
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import sys |
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# Global name |
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__version__ = '3.1.3_BETA' |
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__author__ = 'Nicolas Hennion <[email protected]>' |
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__license__ = 'LGPLv3' |
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# Import psutil |
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try: |
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from psutil import __version__ as psutil_version |
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except ImportError: |
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print('psutil library not found. Glances cannot start.') |
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sys.exit(1) |
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# Import Glances libs |
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# Note: others Glances libs will be imported optionally |
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from glances.logger import logger |
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from glances.main import GlancesMain |
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from glances.globals import WINDOWS |
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from glances.timer import Counter |
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# Check locale |
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try: |
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locale.setlocale(locale.LC_ALL, '') |
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except locale.Error: |
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print("Warning: Unable to set locale. Expect encoding problems.") |
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# Check Python version |
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if sys.version_info < (2, 7) or (3, 0) <= sys.version_info < (3, 4): |
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print('Glances requires at least Python 2.7 or 3.4 to run.') |
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sys.exit(1) |
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# Check psutil version |
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psutil_min_version = (5, 3, 0) |
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psutil_version_info = tuple([int(num) for num in psutil_version.split('.')]) |
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if psutil_version_info < psutil_min_version: |
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print('psutil 5.3.0 or higher is needed. Glances cannot start.') |
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sys.exit(1) |
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def __signal_handler(signal, frame): |
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"""Callback for CTRL-C.""" |
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end() |
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def end(): |
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"""Stop Glances.""" |
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try: |
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mode.end() |
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except NameError: |
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# NameError: name 'mode' is not defined in case of interrupt shortly... |
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# ...after starting the server mode (issue #1175) |
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pass |
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logger.info("Glances stopped (keypressed: CTRL-C)") |
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# The end... |
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sys.exit(0) |
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def start(config, args): |
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"""Start Glances.""" |
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# Load mode |
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global mode |
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start_duration = Counter() |
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if core.is_standalone(): |
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from glances.standalone import GlancesStandalone as GlancesMode |
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elif core.is_client(): |
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if core.is_client_browser(): |
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from glances.client_browser import GlancesClientBrowser as GlancesMode |
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else: |
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from glances.client import GlancesClient as GlancesMode |
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elif core.is_server(): |
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from glances.server import GlancesServer as GlancesMode |
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elif core.is_webserver(): |
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from glances.webserver import GlancesWebServer as GlancesMode |
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# Init the mode |
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logger.info("Start {} mode".format(GlancesMode.__name__)) |
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mode = GlancesMode(config=config, args=args) |
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# Start the main loop |
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logger.debug("Glances started in {} seconds".format(start_duration.get())) |
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mode.serve_forever() |
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# Shutdown |
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mode.end() |
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def main(): |
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"""Main entry point for Glances. |
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Select the mode (standalone, client or server) |
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Run it... |
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""" |
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# Catch the CTRL-C signal |
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signal.signal(signal.SIGINT, __signal_handler) |
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# Log Glances and psutil version |
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logger.info('Start Glances {}'.format(__version__)) |
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logger.info('{} {} and psutil {} detected'.format( |
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platform.python_implementation(), |
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platform.python_version(), |
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psutil_version)) |
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# Share global var |
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global core |
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# Create the Glances main instance |
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core = GlancesMain() |
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config = core.get_config() |
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args = core.get_args() |
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# Glances can be ran in standalone, client or server mode |
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start(config=config, args=args) |
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