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utils.py

# coding=utf-8
#
# Copyright © Cloud Linux GmbH & Cloud Linux Software, Inc 2010-2019 All Rights Reserved
#
# Licensed under CLOUD LINUX LICENSE AGREEMENT
# http://cloudlinux.com/docs/LICENSE.TXT

import configparser
import io
import os
import json
import fcntl
import struct
import time
from typing import Optional, Dict, AnyStr, Union

from jwt import decode, exceptions

from clcommon.lib.consts import DEFAULT_JWT_ES_TOKEN_PATH
from clcommon.lib.whmapi_lib import WhmApiRequest, WhmApiError
from clcommon.clcaptain import mkdir as mkdir_p
from clcommon.utils import process_is_running
from clconfig.cagefs_statistics_config import check_cagefs_initialized
from cldetectlib import CL_CONFIG_FILE
from secureio import write_file_via_tempfile

def dummy_none_function(*a, **kw):
    return None

try:
    from clselect.clselectctl import interpreter_versions_short_summary
    from clselector.clpassenger_detectlib import is_clpassenger_active
except ImportError:
    interpreter_versions_short_summary = dummy_none_function
    is_clpassenger_active = dummy_none_function

_CL_STATISTICS_SECTION = "license_check"
_CL_STATISTICS_COLLECT_STATE_OPTION = "cl_statistics_enabled"
_CL_STATISTICS_COLLECT_RPM_STATE_OPTION = "cl_statistics_rpm_enabled"
_CL_STATISTICS_DIR = '/var/lve'
_CL_STATISTICS_SEND_STATUS_FILE = os.path.join(_CL_STATISTICS_DIR, 'summary_status.json')
_CL_STATISTICS_LOCK_PATH = '/var/run/cloudlinux_summary.send.lock'
_CL_STATISTICS_LOCK_FILE = None

CL_PLUS_SENDER_FILE_PATH = '/usr/share/cloudlinux/cl_plus/clplus_sender.py'
ALT_PYTHON_VIRTUALENV_BIN = '/opt/cloudlinux/venv/bin/virtualenv'

class SummaryStatus:
    """
    Status of both, collecting and sending statistics
    If process still collects statistics ->  IN_PROGRESS
    If statistics collected and sent correctly -> SUCCESS
    If any error during collecting or sending -> FAILED
    """
    SUCCESS = 'success'
    IN_PROGRESS = 'in_progress'
    FAILED = 'failed'

def is_virtualenv_installed():
    """
    Checks is virtualenv installed
    :return: True/False - installed or not
    """
    return os.path.exists(ALT_PYTHON_VIRTUALENV_BIN)

def is_locked(lock_file):
    """
    Check if file is locked by another process without acquiring lock.
    IMPORTANT! This function should NOT be used to check lock acquired by the
    same process that executes the is_locked() function. For example, when
    process executes fcntl.lockf(LOCK_FILE), and then the same process executes
    is_locked(LOCK_FILE), the is_locked(LOCK_FILE) call returns False.
    Use is_locked() function to check lock acquired by another process only.
    :param lock_file: file to check lock on
    :type lock_file: file object or descriptor
    """
    lock_data = struct.pack("hhllhh", fcntl.F_WRLCK, 0, 0, 0, 0, 0)
    try:
        lock_query = fcntl.fcntl(lock_file, fcntl.F_GETLK, lock_data)
        lock_status = struct.unpack("hhllhh", lock_query)[0]
    except (OSError, IOError):
        # should never happen
        return False
    return lock_status != fcntl.F_UNLCK

def is_sending_process_running(acquire_lock=False):
    """
    Check if processes collecting stats are running already (with --send option in command line)
    :param acquire_lock: True = acquire lock when possible
    :type acquire_lock: bool
    :return bool: True = Processes are running
    """
    global _CL_STATISTICS_LOCK_FILE
    _CL_STATISTICS_LOCK_FILE = open(  # pylint: disable=consider-using-with
        _CL_STATISTICS_LOCK_PATH, 'w', encoding='utf-8'
    )
    if not acquire_lock:
        return is_locked(_CL_STATISTICS_LOCK_FILE)
    try:
        fcntl.lockf(_CL_STATISTICS_LOCK_FILE, fcntl.LOCK_EX | fcntl.LOCK_NB)
    except (OSError, IOError):
        return True
    return False

def _get_config():
    """
    Retrieves ConfigParser object for /etc/sysconfig/cloudlinux file
    :return:
    """
    config = configparser.ConfigParser(interpolation=None,
                                       strict=True)
    config.optionxform = str  # make config case sensitive
    config.read(CL_CONFIG_FILE)
    return config

def _write_config(config):
    """
    write config to /etc/sysconfig/cloudlinux file
    :param config: configParser object to write
    return boolean: True|False
    """
    try:
        string_fp = io.StringIO()
        config.write(string_fp)
        content = string_fp.getvalue()
        write_file_via_tempfile(content, CL_CONFIG_FILE, 0o644, prefix='cloudlinux_')
    except (OSError, IOError):
        return False
    return True

def _get_config_value(parameter: str, default: bool = True) -> bool:
    """
    Retrieves parameter's value from /etc/sysconfig/cloudlinux file, _CL_STATISTICS_SECTION section
    """
    config = _get_config()
    res = default
    try:
        res = config.getboolean(_CL_STATISTICS_SECTION, parameter)
    except (configparser.NoSectionError, configparser.NoOptionError, ValueError):
        # Treat absent/missing value as default
        pass
    return res

def _set_config_value(parameter: str, value: bool) -> None:
    """
    Sets parameter's value to /etc/sysconfig/cloudlinux file, _CL_STATISTICS_SECTION section
    """
    config = _get_config()
    config.set(_CL_STATISTICS_SECTION, parameter, str(int(value)))
    _write_config(config)

def is_statistic_enabled() -> bool:
    """
    Retrieves statistic collection status from /etc/sysconfig/cloudlinux file
    :return: True/False - enabled/disabled
    """
    return _get_config_value(_CL_STATISTICS_COLLECT_STATE_OPTION)

def is_statistic_rpm_enabled() -> bool:
    """
    Retrieves rpm statistic collection status from /etc/sysconfig/cloudlinux file
    :return: True/False - enabled/disabled
    """
    return _get_config_value(_CL_STATISTICS_COLLECT_RPM_STATE_OPTION)

def set_statistic_collection_enabled(is_enabled: bool) -> None:
    """
    Set statistic collection status to /etc/sysconfig/cloudlinux file
    :param is_enabled: True/False - enabled/disabled
    """
    _set_config_value(_CL_STATISTICS_COLLECT_STATE_OPTION, is_enabled)

def set_statistic_rpm_collection_enabled(is_enabled: bool) -> None:
    """
    Set rpm statistic collection status to /etc/sysconfig/cloudlinux file
    :param is_enabled: True/False - enabled/disabled
    """
    _set_config_value(_CL_STATISTICS_COLLECT_RPM_STATE_OPTION, is_enabled)

def write_statistics_send_status_to_file(status_dict):
    """
    Writes statistics send status to file /var/lve/summary_status.json
    :param status_dict: status dictionary for write to file
    :return:
    """
    try:
        if not os.path.exists(_CL_STATISTICS_DIR):
            mkdir_p(_CL_STATISTICS_DIR)
        content = json.dumps(status_dict)
        # Write to file readable only for root
        write_file_via_tempfile(content, _CL_STATISTICS_SEND_STATUS_FILE, 0o600, prefix='cloudlinux_')
    except (OSError, IOError):
        pass

def get_statistics_send_status_from_file():
    """
    Retrieves statistics send status from file /var/lve/summary_status.json
    :return: Dictionary with last send status. None if any error
    """
    status_dict = None
    try:
        with open(_CL_STATISTICS_SEND_STATUS_FILE, encoding='utf-8') as f:
            s_content = f.read()
        status_dict = json.loads(s_content)
        if status_dict['result'] == SummaryStatus.IN_PROGRESS \
                and not is_sending_process_running():
            # something went wrong during collection
            status_dict['result'] = SummaryStatus.FAILED
            status_dict['reason'] = 'Collecting statistics was failed. Error ' \
                                    'report has been sent to developers and will be fixed soon'
    except (OSError, IOError, ValueError, AttributeError, TypeError):
        pass
    return status_dict

def installed_interpreters_list(interpreter):
    """
    Returns list of installed interpreters
    :param interpreter: str - name of interpreter
    :rtype: List of InterpreterSummary
    """
    return [i for i in interpreter_versions_short_summary(interpreter) if i.installed]

def is_python_selector_installed():
    """
    Checks that python selector is installed
    Installed if:
    - ea-apache24-mod-alt-passenger or alt-mod-passenger is installed
    - alt-python-virtualenv is installed
    :rtype: bool
    """
    return is_clpassenger_active() and is_virtualenv_installed()

def is_ruby_selector_installed():
    """
    Checks that ruby selector is installed
    Installed if:
    - ea-apache24-mod-alt-passenger or alt-mod-passenger is installed
    - alt-python-virtualenv is installed
    :rtype: bool
    """
    return is_clpassenger_active() and is_virtualenv_installed()

def is_nodejs_selector_installed():
    """
    Checks that nodejs selector is installed
    Installed if:
    - ea-apache24-mod-alt-passenger or alt-mod-passenger is installed
    - At least one version is installed
    :rtype: bool
    """
    return is_clpassenger_active() and bool(installed_interpreters_list('nodejs'))

def is_php_selector_installed():
    """
    Checks that php selector is installed
    Installed if:
    - CageFS is initialized
    :rtype: bool
    """
    return bool(check_cagefs_initialized())

def get_packages_with_lve_extensions():
    """
    Gets packages with set lve limits via extension
    """
    try:
        result = WhmApiRequest('listpkgs').call()
    except WhmApiError:
        return []
    lve_extensions_packages = [item['name'] for item in result['pkg']
                               if '_PACKAGE_EXTENSIONS' in item and item['_PACKAGE_EXTENSIONS'] == 'lve']
    return lve_extensions_packages

def get_client_data_from_jwt_token(check_expiration=True) -> Optional[Dict[AnyStr, Union[AnyStr, bool]]]:
    """
    Gets (if any) fields cl_plus and client_id from jwt token
    :return: decoded jwt_token value, None if error
     jwt_token: result of the successful decoding
    """
    try:
        with open(DEFAULT_JWT_ES_TOKEN_PATH, mode='rb') as file:
            file_content = file.read().strip()
    except (OSError, IOError):
        return None
    # JWT read success
    try:
        jwt_token = decode(file_content, algorithms=['HS256'],
                           options={'require_exp': True,
                                    "verify_exp": check_expiration,
                                    "verify_iss": True,
                                    'verify_signature': False},
                           issuer='CloudLinux')
        return jwt_token
    # JWT format error
    except exceptions.PyJWTError:
        return None

def is_active_cloudlinux_license(token_data):
    """
    Checks whether license ts is expired
    """
    if not token_data:
        return None
    if not token_data.get('exp'):
        return None
    return int(time.time()) < int(token_data.get('exp'))

def get_cl_plus_sender_status() -> Optional[AnyStr]:
    """
    Retrieves data from status of cl_plus_sender service
    :return: status of service, Optional[AnyStr]
    - 'active'
    - 'inactive'
    """
    try:
        result = process_is_running(CL_PLUS_SENDER_FILE_PATH, False)
    except FileNotFoundError:
        result = False
    return 'active' if result else 'inactive'

Name	Type	Size	Owner/Group	Permission	Last Modified	Actions
.	dir	-	root/root	0755	2026-04-09 07:00:47
..	dir	-	root/root	0755	2026-04-09 07:03:19
__pycache__	dir	-	root/root	0755	2026-04-09 07:20:23
__init__.py	text/x-script.python	271 B	root/root	0644	2026-03-12 11:00:24
arg_parse.py	text/x-script.python	2.24 KB	root/root	0644	2026-03-12 11:00:24
hardware_statistics.py	text/x-script.python	3.82 KB	root/root	0644	2026-03-12 11:00:24
rpm_packages_statistics.py	text/x-script.python	4.1 KB	root/root	0644	2026-03-12 11:00:24
storage.py	text/x-script.python	2.47 KB	root/root	0644	2026-03-12 11:00:24
summary.py	text/x-script.python	147.14 KB	root/root	0644	2026-03-12 11:00:24
utils.py	text/x-script.python	10.99 KB	root/root	0644	2026-03-12 11:00:24

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