mirror of
https://github.com/HorlogeSkynet/archey4
synced 2024-11-25 04:00:10 +01:00
f0b82e4efd
> Archey won't crash anymore if `ps` could not be found (or its implementation is not supported). > Please note that without it, many entries may not work as expected.
39 lines
1.3 KiB
Python
39 lines
1.3 KiB
Python
"""Simple class (acting as a singleton) to handle processes listing"""
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import logging
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from subprocess import CalledProcessError, PIPE, check_output
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from archey.singleton import Singleton
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class Processes(metaclass=Singleton):
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"""At startup, instantiate this class to populate a list of running processes"""
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def __init__(self):
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try:
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ps_output = check_output(
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['ps', '-eo', 'comm'],
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stderr=PIPE, universal_newlines=True
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)
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except FileNotFoundError:
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self._processes = []
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logging.warning("`procps` (or `procps-ng`) couldn't be found on your system.")
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except CalledProcessError as process_error:
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self._processes = []
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logging.warning(
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"This implementation of `ps` might not be supported : %s", process_error.stderr
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)
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else:
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# Discard first heading line here.
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self._processes = ps_output.splitlines()[1:]
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@property
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def list(self) -> tuple:
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"""Simple getter to retrieve (am immutable copy of) the processes list"""
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return tuple(self._processes)
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@property
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def number(self) -> int:
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"""Simple getter to retrieve the number of stored processes"""
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return len(self._processes)
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