1 | # -*- coding: utf-8 -*- |
||
2 | # |
||
3 | # This file is part of Glances. |
||
4 | # |
||
5 | # Copyright (C) 2020 Nicolargo <[email protected]> |
||
6 | # |
||
7 | # Glances is free software; you can redistribute it and/or modify |
||
8 | # it under the terms of the GNU Lesser General Public License as published by |
||
9 | # the Free Software Foundation, either version 3 of the License, or |
||
10 | # (at your option) any later version. |
||
11 | # |
||
12 | # Glances is distributed in the hope that it will be useful, |
||
13 | # but WITHOUT ANY WARRANTY; without even the implied warranty of |
||
14 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
||
15 | # GNU Lesser General Public License for more details. |
||
16 | # |
||
17 | # You should have received a copy of the GNU Lesser General Public License |
||
18 | # along with this program. If not, see <http://www.gnu.org/licenses/>. |
||
19 | # |
||
20 | |||
21 | """Init the Glances software.""" |
||
22 | |||
23 | # Import system libs |
||
24 | import locale |
||
25 | import platform |
||
26 | import signal |
||
27 | import sys |
||
28 | |||
29 | # Global name |
||
30 | # Version should start and end with a numerical char |
||
31 | # See https://packaging.python.org/specifications/core-metadata/#version |
||
32 | __version__ = '3.1.6.2' |
||
33 | __author__ = 'Nicolas Hennion <[email protected]>' |
||
34 | __license__ = 'LGPLv3' |
||
35 | |||
36 | # Import psutil |
||
37 | try: |
||
38 | from psutil import __version__ as psutil_version |
||
39 | except ImportError: |
||
40 | print('psutil library not found. Glances cannot start.') |
||
0 ignored issues
–
show
Unused Code
Coding Style
introduced
by
Loading history...
|
|||
41 | sys.exit(1) |
||
42 | |||
43 | # Import Glances libs |
||
44 | # Note: others Glances libs will be imported optionally |
||
45 | from glances.logger import logger |
||
46 | from glances.main import GlancesMain |
||
47 | from glances.globals import WINDOWS |
||
48 | from glances.timer import Counter |
||
49 | # Check locale |
||
50 | try: |
||
51 | locale.setlocale(locale.LC_ALL, '') |
||
52 | except locale.Error: |
||
53 | print("Warning: Unable to set locale. Expect encoding problems.") |
||
0 ignored issues
–
show
|
|||
54 | |||
55 | # Check Python version |
||
56 | if sys.version_info < (2, 7) or (3, 0) <= sys.version_info < (3, 4): |
||
57 | print('Glances requires at least Python 2.7 or 3.4 to run.') |
||
0 ignored issues
–
show
|
|||
58 | sys.exit(1) |
||
59 | |||
60 | # Check psutil version |
||
61 | psutil_min_version = (5, 3, 0) |
||
62 | psutil_version_info = tuple([int(num) for num in psutil_version.split('.')]) |
||
63 | if psutil_version_info < psutil_min_version: |
||
64 | print('psutil 5.3.0 or higher is needed. Glances cannot start.') |
||
0 ignored issues
–
show
|
|||
65 | sys.exit(1) |
||
66 | |||
67 | |||
68 | def __signal_handler(signal, frame): |
||
0 ignored issues
–
show
signal is re-defining a name which is already available in the outer-scope (previously defined on line 26 ).
It is generally a bad practice to shadow variables from the outer-scope. In most cases, this is done unintentionally and might lead to unexpected behavior: param = 5
class Foo:
def __init__(self, param): # "param" would be flagged here
self.param = param
Loading history...
|
|||
69 | """Callback for CTRL-C.""" |
||
70 | end() |
||
71 | |||
72 | |||
73 | def end(): |
||
74 | """Stop Glances.""" |
||
75 | try: |
||
76 | mode.end() |
||
77 | except NameError: |
||
78 | # NameError: name 'mode' is not defined in case of interrupt shortly... |
||
79 | # ...after starting the server mode (issue #1175) |
||
80 | pass |
||
81 | |||
82 | logger.info("Glances stopped (keypressed: CTRL-C)") |
||
83 | |||
84 | # The end... |
||
85 | sys.exit(0) |
||
86 | |||
87 | |||
88 | def start(config, args): |
||
89 | """Start Glances.""" |
||
90 | |||
91 | # Load mode |
||
92 | global mode |
||
0 ignored issues
–
show
|
|||
93 | |||
94 | start_duration = Counter() |
||
95 | |||
96 | if core.is_standalone(): |
||
97 | from glances.standalone import GlancesStandalone as GlancesMode |
||
98 | elif core.is_client(): |
||
99 | if core.is_client_browser(): |
||
100 | from glances.client_browser import GlancesClientBrowser as GlancesMode |
||
101 | else: |
||
102 | from glances.client import GlancesClient as GlancesMode |
||
103 | elif core.is_server(): |
||
104 | from glances.server import GlancesServer as GlancesMode |
||
105 | elif core.is_webserver(): |
||
106 | from glances.webserver import GlancesWebServer as GlancesMode |
||
107 | |||
108 | # Init the mode |
||
109 | logger.info("Start {} mode".format(GlancesMode.__name__)) |
||
110 | mode = GlancesMode(config=config, args=args) |
||
111 | |||
112 | # Start the main loop |
||
113 | logger.debug("Glances started in {} seconds".format(start_duration.get())) |
||
114 | mode.serve_forever() |
||
115 | |||
116 | # Shutdown |
||
117 | mode.end() |
||
118 | |||
119 | |||
120 | def main(): |
||
121 | """Main entry point for Glances. |
||
122 | |||
123 | Select the mode (standalone, client or server) |
||
124 | Run it... |
||
125 | """ |
||
126 | # Catch the CTRL-C signal |
||
127 | signal.signal(signal.SIGINT, __signal_handler) |
||
128 | |||
129 | # Log Glances and psutil version |
||
130 | logger.info('Start Glances {}'.format(__version__)) |
||
131 | logger.info('{} {} and psutil {} detected'.format( |
||
132 | platform.python_implementation(), |
||
133 | platform.python_version(), |
||
134 | psutil_version)) |
||
135 | |||
136 | # Share global var |
||
137 | global core |
||
0 ignored issues
–
show
|
|||
138 | |||
139 | # Create the Glances main instance |
||
140 | core = GlancesMain() |
||
141 | config = core.get_config() |
||
142 | args = core.get_args() |
||
143 | |||
144 | # Glances can be ran in standalone, client or server mode |
||
145 | start(config=config, args=args) |
||
146 |