62 lines
2.0 KiB
Python
62 lines
2.0 KiB
Python
# Copyright (c) 2021 Red Hat, Inc.
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#
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# All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# 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, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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from __future__ import absolute_import
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import functools
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import os
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from oslo_log import log
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import tobiko
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from tobiko.shell.sh import _command
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from tobiko.shell.sh import _exception
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from tobiko.shell.sh import _execute
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from tobiko.shell import ssh
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LOG = log.getLogger(__name__)
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class GetCommandLineError(tobiko.TobikoException):
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message = "Unable to get process command line: {error}"
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class GetCommandLineMismatch(GetCommandLineError):
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message = ("Command line of process ({pid}) doesn't match its command "
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"({command}): {command_line}")
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@functools.lru_cache(typed=True)
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def get_command_line(pid: int,
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ssh_client: ssh.SSHClientType = None,
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command: str = None,
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_cache_id: int = None) \
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-> _command.ShellCommand:
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try:
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output = _execute.execute(f'cat /proc/{pid}/cmdline',
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ssh_client=ssh_client).stdout
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except _exception.ShellCommandFailed as ex:
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raise GetCommandLineError(error=ex.stderr) from ex
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command_line = _command.ShellCommand(output.strip().split('\0')[:-1])
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if not command_line:
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raise GetCommandLineError(error="command line is empty")
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if command is not None and os.path.basename(command_line[0]) != command:
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raise GetCommandLineMismatch(pid=pid, command=command,
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command_line=command_line)
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return command_line
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