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File Name : libcloudlinux.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

from __future__ import print_function
from __future__ import division
from __future__ import absolute_import
import copy
import sys
import json
import argparse
import socket
import base64
import os
import subprocess
import re
from enum import Enum
from dataclasses import dataclass
from typing import Callable, List, Optional

from past.builtins import basestring, unicode  # noqa
from future.utils import iteritems
from clcommon.utils import silence_stdout_until_process_exit, get_cl_version, is_ubuntu
from cllicense import CloudlinuxLicenseLib
from cpanel_api import get_cpanel_api_class
from clcommon.lib.cledition import is_cl_solo_edition, is_container
from clcommon.cpapi import is_hitting_max_accounts_limit, get_main_username_by_uid

LVEMANAGER_PLUGIN_NAMES = {
    "python_selector": "Python Selector",
    "nodejs_selector": "Node.js Selector",
    "php_selector": "PHP Selector",
    "resource_usage": "Resource Usage",
    "wpos": "AccelerateWP",
}
PASSENGER_DEPEND_PLUGINS = ["python_selector", "nodejs_selector"]
DEFAULT_PLUGIN_NAME = "CloudLinux Manager"

CAGEFS_ENTER_PROXIED_BIN = "/usr/bin/cagefs_enter.proxied"
if not os.path.exists(CAGEFS_ENTER_PROXIED_BIN):
    CAGEFS_ENTER_PROXIED_BIN = "/bin/cagefs_enter.proxied"

LVE_SUWRAPPER_BIN = "/usr/bin/lve_suwrapper"

def is_json(data):
    try:
        json.loads(data)
        return True
    except ValueError as error:
        return False

class EnterFlagType(Enum):
    """Enum for different types of enter flags"""

IO_AND_MEMORY_LIMIT = "io_and_memory_limit"
    CPU_LIMIT = "cpu_limit"
    MAX_ENTER = "max_enter"

class EnterTool(Enum):
    """Enum for different enter tools"""

CAGEFS_ENTER_PROXIED = "cagefs_enter.proxied"
    LVE_SUWRAPPER = "lve_suwrapper"

@dataclass
class EnterFlags:
    """Abstraction layer for enter flags that can be converted between different tools"""

no_io_and_memory_limit: bool = False
    no_cpu_limit: bool = False
    no_max_enter: bool = False

def to_cagefs_args(self) -> List[str]:
        """Convert to cagefs_enter.proxied format"""
        args = []
        if self.no_io_and_memory_limit:
            args.append("--no-io-and-memory-limit")
        if self.no_cpu_limit:
            args.append("--no-cpu-limit")
        if self.no_max_enter:
            args.append("--no-max-enter")
        return args

def to_lve_suwrapper_args(self) -> List[str]:
        """Convert to lve_suwrapper format"""
        args = []
        if self.no_io_and_memory_limit:
            args.append("-m")
        if self.no_cpu_limit:
            args.append("-c")
        if self.no_max_enter:
            args.append("-e")
        return args

@classmethod
    def no_limits(cls) -> "EnterFlags":
        """Create flags for no limits"""
        return cls(no_io_and_memory_limit=True, no_cpu_limit=True, no_max_enter=True)

@classmethod
    def all_limits(cls) -> "EnterFlags":
        """Create flags for all limits"""
        return cls(no_io_and_memory_limit=False, no_cpu_limit=False, no_max_enter=False)

class CloudlinuxCliBase(object):
    request_data = {}
    result = None
    available_request_params = [
        "owner",
        "command",
        "method",
        "params",
        "user_info",
        "mockJson",
        "attachments",
        "plugin_name",
        "lang",
    ]
    NOT_FLAGGED_PARAMS = [
        "config-files",
        "content",
        "passenger-log-file",
        "ignore-list",
        "wp-path",
        "upgrade-url",
    ]
    license_is_checked = False
    current_plugin_name = ""
    licence = CloudlinuxLicenseLib()

def __init__(self):
        self.skip_cagefs_check = False
        self.user_info = {}
        self.parsing_request_data()
        self.check_xss()
        self.drop_permission()
        self.command_methods = {
            "spa-ping": self.spa_ping,
            "cloudlinux-top": self.cl_top,
            "cloudlinux-selector": self.cl_selector,
            "cloudlinux-statistics": self.cl_statistics,
            "cloudlinux-charts": self.cl_chart,
            "cloudlinux-quota": self.cl_quota,
            "cpanel-api": self.cpanel_api,
            "cloudlinux-xray-user-manager": self.cl_xray_user_manager,
            "cloudlinux-statsnotifier": self.cl_statsnotifier,
            "cloudlinux-awp-user": self.cloudlinux_awp_user,
            "cl-smart-advice-user": self.cl_smart_advice_user,
            "cl-install-plugin": self.cl_install_plugin,
        }

def check_xss(self):
        for key in self.request_data.keys():
            if key not in self.available_request_params:
                self.exit_with_error("BAD REQUEST 1:" + key)

for name, val in iteritems(self.request_data):
            if isinstance(val, dict):  # if post key is "params"
                for key, inner_value in iteritems(val):
                    self.check_param_key(key)
                    if (
                        self.request_data["command"] == "cloudlinux-packages"
                        and name == "params"
                        and key == "package"
                    ):
                        self.request_data[name][key] = self.escape_param_value(
                            inner_value
                        )
                    elif self.request_data["command"] == "cloudlinux-support":
                        pass
                    elif (
                        self.request_data["command"] == "cloudlinux-selector"
                        and name == "params"
                        and key == "options"
                    ):
                        pass
                    elif (
                        self.request_data["command"] == "lvectl"
                        and name == "params"
                        and key == "stdin"
                    ):
                        pass
                    elif (
                        self.request_data["command"] == "cloudlinux-selector"
                        and name == "params"
                        and key == "env-vars"
                    ):
                        pass
                    elif (
                        self.request_data["command"] == "cloudlinux-xray-manager"
                        and name == "params"
                        and key == "url"
                    ):
                        pass
                    elif (
                        self.request_data["command"] == "cloudlinux-xray-user-manager"
                        and name == "params"
                        and key == "url"
                    ):
                        pass
                    elif (
                        self.request_data["command"] == "wmt-api"
                        and name == "params"
                        and key == "config-change"
                    ):
                        pass
                    elif (
                        self.request_data["command"] == "cloudlinux-xray-manager"
                        and name == "params"
                        and key == "email"
                    ):
                        pass
                    elif (
                        self.request_data["command"] == "cloudlinux-awp-admin"
                        and name == "params"
                        and key == "upgrade-url"
                    ):
                        pass
                    else:
                        self.check_param_value(inner_value)
            else:
                self.check_param_value(val)

def get_env(self):
        """
        Get env for subprocess call
        """
        env_copy = os.environ.copy()
        if self.request_data.get("lang"):
            lang = self.request_data.get("lang")
            if not re.match(r"^[a-z]{2}$", lang):
                lang = "en"
            env_copy["LC_ALL"] = lang
        return env_copy

def get_server_ip(self):
        """
        Get the server's IP address.
        """
        try:
            s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
            s.connect(("8.8.8.8", 80))
            return s.getsockname()[0]
        except Exception as e:
            return None

def check_param_key(self, key):
        if not re.search("^[\w\-]+$", key):
            self.exit_with_error("BAD REQUEST 2")

def check_param_value(self, val):
        if isinstance(val, basestring):
            if re.search("[`\|\$;&\n]", val, re.M):
                self.exit_with_error("BAD REQUEST 3")

def escape_param_value(self, val):
        chars = "\\\"'"
        for c in chars:
            val = val.replace(c, "\\" + c)
        return val

def main(self):
        command = self.request_data["command"]
        endpoint = self.command_methods.get(command)
        allowed_methods = [
            "cloudlinux-license",
            "external-info",
            "spa-get-user-info",
        ]  # not requires license check
        if endpoint:
            if not self.license_is_checked and command not in allowed_methods:
                self.check_license()
            if "mockJson" in self.request_data:
                self.spa_mock(self.request_data["mockJson"])
            endpoint()
        else:
            if command:
                self.exit_with_error("No such module " + command)
            else:
                self.exit_with_error("Command not defined")

def parsing_request_data(self):
        """
        parsing entry data, encode it from base64 to dictionary
        :return:
        """
        parser = argparse.ArgumentParser()
        parser.add_argument("--data")
        parser.add_argument("--skip-cagefs-check", action="store_true", default=False)
        try:
            arguments = parser.parse_args()
        except:
            self.exit_with_error("Unknown param in request")

if arguments.data:
            data_in_base64 = arguments.data
            data_in_json = base64.b64decode(data_in_base64).decode("utf-8")
            try:
                self.request_data = json.loads(data_in_json)
                self.skip_cagefs_check = arguments.skip_cagefs_check
            except ValueError:
                self.exit_with_error("Need json-array")
            self.user_info = self.get_user_info()
            self.define_current_plugin()
        else:
            self.exit_with_error("No --data param in request")

def get_user_info(self):
        user_info = self.request_data.get("user_info") or {}
        if self.request_data["owner"] == "user" and any(
            value is None for value in user_info.values()
        ):
            euid = os.geteuid()
            username = get_main_username_by_uid(euid)
            user_info = {"username": username, "lve-id": euid}
        return user_info

def cl_top(self):
        # This imports from other package (cagefs), so we turn off pylint import checker for this line
        from lvestats.lib.info.cloudlinux_top import CloudLinuxTop  # pylint: disable=E0401
        import lvestats.lib.config as config  # pylint: disable=E0401

list_to_request = self.prepair_params_for_command()
        result = ""
        try:
            result, exitcode = CloudLinuxTop(config.read_config()).main(
                *list_to_request
            )
        except config.ConfigError as ce:
            ce.log_and_exit()
            self.exit_with_error(str(ce))

if self.request_data.get("owner") == "user":
            json_result = {}
            try:
                json_result = json.loads(result)
            except:
                self.exit_with_error(result)

if json_result.get("result") != "success":
                self.exit_with_error(
                    json_result.get("result"),
                    json_result.get("context"),
                    ignore_errors=True,
                )
        print(result)
        silence_stdout_until_process_exit()
        sys.exit(exitcode)

def cl_quota(self):
        list_to_request = self.prepair_params_for_command()
        result = self.run_util(
            "/usr/bin/cl-quota", *list_to_request, ignore_errors=True
        )
        print(result)

def cl_xray_user_manager(self):
        list_to_request = self.prepair_params_for_command()
        list_to_request.remove("--json")
        result = self.run_util(
            "/opt/alt/php-xray/cloudlinux-xray-user-manager",
            *list_to_request,
            ignore_errors=False,
        )
        print(result)

def cl_smart_advice_user(self):
        cli_command = "/opt/alt/php-xray/cl-smart-advice-user"
        list_to_request = self.prepair_params_for_command(with_json=False)
        # Workaround to run the command in background
        if "--async" in list_to_request:
            subprocess.Popen(
                [cli_command, *list_to_request],
                stdin=subprocess.PIPE,
                stdout=subprocess.PIPE,
                stderr=subprocess.PIPE,
                text=True,
            )
            self.exit_with_success()
        result = self.run_util(cli_command, *list_to_request, ignore_errors=False)
        print(result)

def cpanel_api(self):
        owner = self.request_data.get("owner")
        method = self.request_data.pop("method")
        list_to_request = self.prepair_params_for_command(
            with_json=False, add_dash=False
        )
        cpanel_api = get_cpanel_api_class(owner)
        self.exit_with_success({"data": cpanel_api.run(method, list_to_request)})

def cl_chart(self):
        list_to_request = self.prepair_params_for_command()
        try:
            list_to_request.remove("--json")
        except ValueError:
            pass
        for param in list_to_request:
            if param.startswith("--output"):
                self.exit_with_error("BAD REQUEST 2")
        list_to_request.insert(0, "/usr/sbin/lvechart")
        response = subprocess.check_output(list_to_request, shell=False, text=True)
        print(json.dumps({"result": "success", "chart": response}))
        silence_stdout_until_process_exit()
        sys.exit(0)

def drop_permission(self):
        """
        Drop permission to users, if owner of script is user
        :return:
        """
        data = self.request_data
        if data["owner"] in ["reseller", "user"] and (
            "lve-id" not in self.user_info or "username" not in self.user_info
        ):
            self.exit_with_error("User id does not specified")

def prepair_params_for_command(
        self, with_json=True, escaped_strings=False, add_dash=True
    ):
        """
        Method that converts given dict of parameters
        into list of strings that should be passed
        as arguments command-line application
        :param with_json: add --json argument
        :param escaped_strings: ONLY FOR BACKWARDS COMPATIBILITY!
                                SHOULD BE False FOR ALL NEW METHODS!
        :param add_dash: if we need to add dashes to params
        :return:
        """
        value_template = "--{0}={1}" if add_dash else "{0}={1}"
        data = copy.deepcopy(self.request_data)
        list_to_request = []
        if "method" in data:
            for method in data["method"].split(" "):
                list_to_request.append(method)

if "params" not in data:
            data["params"] = {}
        if "json" not in data["params"] and with_json:
            data["params"]["json"] = ""

for param, value in iteritems(data["params"]):
            if param != "additional-params":
                # TODO: looks like we can remove option escaped_strings
                # and always use value.encode('utf-8') here
                # same goal may be reached using utils.byteify(json.loads(...))
                # but to do that, we need some tests covering unicode params
                # (especially for cloudlinux-packages)
                # unfortunately, we do not have one ;(
                # THIS IS NEEDED ONLY FOR CL-PACKAGES UTILITY
                if value and escaped_strings is True:
                    list_to_request.append(
                        value_template.format(
                            param, value.encode("unicode-escape").decode()
                        )
                    )
                elif (
                    value or param in self.NOT_FLAGGED_PARAMS
                ) and escaped_strings is False:
                    list_to_request.append(value_template.format(param, value))
                else:
                    list_to_request.append("--{0}".format(param))
        if self.request_data["owner"] == "reseller":
            list_to_request.append(
                "--for-reseller={0}".format(self.user_info["username"])
            )

if (
            "additional-params" in data["params"]
            and data["params"]["additional-params"] != ""
        ):
            list_to_request.append("--")
            for param in data["params"]["additional-params"].split():
                list_to_request.append("{0}".format(param))

return list_to_request

def is_edition_migration_available(self):
        # check if edition migration is supported
        return os.path.isfile("/usr/sbin/clncheck")

def update_license(self):
        # Register by broken license
        with open(os.devnull, "w") as devnull:
            clnreg_cmd = ["/usr/sbin/clnreg_ks", "--force"]
            if self.is_edition_migration_available():
                clnreg_cmd.append("--migrate-silently")
            subprocess.call(clnreg_cmd, stderr=devnull, stdout=devnull, shell=False)
            subprocess.call(
                ["/usr/bin/cldetect", "--update-license"],
                stderr=devnull,
                stdout=devnull,
                shell=False,
            )

self.check_license(False)

def check_license(self, with_recovery=True):
        if not self.kernel_is_supported():
            if self.request_data["owner"] in ["reseller"]:
                self.exit_with_error(
                    code=503,
                    error_id="ERROR.not_available_plugin",
                    context={
                        "pluginName": LVEMANAGER_PLUGIN_NAMES.get(
                            self.current_plugin_name, DEFAULT_PLUGIN_NAME
                        )
                    },
                    icon="disabled",
                )
            elif self.request_data["owner"] in ["admin"]:
                self.exit_with_error("Kernel is not supported")

if is_hitting_max_accounts_limit():
            if self.request_data["owner"] == "admin":
                self.exit_with_error("ERROR.hitting_max_accounts_limit")
            if self.request_data["owner"] == "user":
                self.exit_with_error(
                    code=503,
                    error_id="ERROR.not_available_plugin",
                    context={
                        "pluginName": LVEMANAGER_PLUGIN_NAMES.get(
                            self.current_plugin_name, DEFAULT_PLUGIN_NAME
                        )
                    },
                    icon="disabled",
                )
        if not self.licence.get_license_status():
            if self.request_data["owner"] in ["reseller", "user"]:
                interpreter = "nodejs"
                if self.request_data.get("params") and self.request_data["params"].get(
                    "interpreter"
                ):
                    interpreter = self.request_data["params"]["interpreter"]
                pluginNames = {
                    "reseller": "CloudLinux Manager",
                    "user": {
                        "python": "Python Selector",
                        "nodejs": "Node.js Selector",
                    }.get(interpreter, "Node.js Selector"),
                }
                self.exit_with_error(
                    code=503,
                    error_id="ERROR.not_available_plugin",
                    context={
                        "pluginName": LVEMANAGER_PLUGIN_NAMES.get(
                            self.current_plugin_name, DEFAULT_PLUGIN_NAME
                        )
                    },
                    icon="disabled",
                )
            else:
                if with_recovery:
                    self.update_license()
                else:
                    self.exit_with_error("License is not valid")
        else:
            self.license_is_checked = True

def exit_with_error(
        self,
        error_string="",
        context=None,
        code=None,
        error_id=None,
        icon=None,
        ignore_errors=False,
    ):
        result = {"result": error_string}
        if context:
            result["context"] = context
        if code:
            result["code"] = code
        if error_id:
            result["error_id"] = error_id
        if icon:
            result["icon"] = icon
        if ignore_errors:
            result["ignore"] = ignore_errors
        print(json.dumps(result))
        sys.exit(1)

def exit_with_success(self, response=None):
        data = copy.deepcopy(response) if response else {}
        data["result"] = "success"
        print(json.dumps(data))
        sys.exit(0)

def cl_statistics(self):
        # This imports from other package (cagefs), so we turn off pylint import checker for this line
        from lvestats.lib.cloudlinux_statistics import main  # pylint: disable=E0401
        import lvestats.lib.config as config  # pylint: disable=E0401
        from lvestats.lib.dbengine import make_db_engine  # pylint: disable=E0401

list_to_request = self.prepair_params_for_command()
        try:
            cnf = config.read_config()
            dbengine = make_db_engine(cnf)
            main(
                dbengine,
                argv_=list_to_request,
                server_id=cnf.get("server_id", "localhost"),
            )
            silence_stdout_until_process_exit()
            sys.exit(0)
        except config.ConfigError as ce:
            ce.log_and_exit()
            self.exit_with_error(ce)

def spa_mock(self, file):
        file_path = "/usr/share/l.v.e-manager/spa/src/jsons/%s.json" % (file)
        # check if passed file param doesn't use relative path. E.g.: '../../file'
        if os.path.realpath(file_path) != file_path:
            self.exit_with_error("BAD REQUEST 3")
        with open(file_path, "r") as f:
            print(f.read())
        sys.exit(0)

def get_lve_version(self):
        try:
            ver = subprocess.check_output(
                "cat /proc/lve/list | grep -Po '^\d{1,2}:'",
                shell=True,
                executable="/bin/bash",
                text=True,
            ).strip()
            return int(ver[:-1])
        except:
            return 0

def get_cloudlinux_version(self):
        return subprocess.check_output(
            "uname -r | grep -Po 'el\d\w?'",
            shell=True,
            executable="/bin/bash",
            text=True,
        ).strip()

# Common methods

def spa_ping(self):
        self.exit_with_success()

def cl_selector(self):
        try:
            from clselector.cl_selector import CloudlinuxSelector
        except:
            self.exit_with_error("Module unavailable")
        if (
            self.user_info.get("username")
            and "interpreter" in self.request_data["params"]
            and self.request_data["params"]["interpreter"] == "php"
        ):
            self.check_php_selector_user_availablility()

list_to_request = self.prepair_params_for_command()
        cll = CloudlinuxSelector()
        cll.run(list_to_request)

def check_php_selector_user_availablility(self):
        """
        Additional check only for php selector
        :return:
        """
        try:
            LIBDIR = "/usr/share/cagefs"
            sys.path.append(LIBDIR)
            import cagefsctl

if not cagefsctl.cagefs_is_enabled or not cagefsctl.is_user_enabled(
                self.user_info["username"]
            ):
                raise RuntimeError("Cagefs is disabled or missing")

except (ImportError, RuntimeError):
            self.exit_with_error(
                code=503,
                error_id="ERROR.cagefsDisabled",
            )
        from clselect.clselectexcept import BaseClSelectException

try:
            from clselect import ClSelect

ClSelect.check_multiphp_system_default_version()
        except BaseClSelectException:
            self.exit_with_error(
                code=503,
                error_id="ERROR.systemVersionAltPHP",
            )

def define_current_plugin(self):
        self.current_plugin_name = self.request_data.get("plugin_name")

def is_error_response_default(self, json_result):
        return (
            json_result.get("result") != "success" and json_result.get("success") != 1
        )

def run_util(self, name, *args, **kwargs):
        command = [name] + list(args)
        error_checker = kwargs.get("error_checker", self.is_error_response_default)
        try:
            p = subprocess.Popen(
                command,
                stdin=subprocess.PIPE,
                stdout=subprocess.PIPE,
                stderr=subprocess.PIPE,
                text=True,
                env=self.get_env(),
            )
            (result, err) = p.communicate(kwargs.pop("stdin", None))
            is_error = p.returncode != 0 or not is_json(result)
            if not is_error:
                json_result = json.loads(result)

is_error = error_checker(json_result)
            if is_error:
                result = result + err
                if is_json(result):
                    json_result = json.loads(result)
                    if json_result.get("message"):
                        json_result["result"] = json_result.pop("message")
                        result = json.dumps(json_result)
                if kwargs.get("ignore_errors", False):
                    # Check new result concatenated with error
                    if is_json(result):
                        result = json.loads(result)
                        result["ignore"] = True
                        result = json.dumps(result)
                    else:
                        result = self.ignored_error_message(result)
                print(result)
                exit(1)
            return result
        except Exception as e:
            self.exit_with_error(
                "Can't run %(command)s",
                context={"command": " ".join(command)},
                ignore_errors=True,
            )

def ignored_error_message(self, message):
        return json.dumps({"result": message, "ignore": True})

def kernel_is_supported(self):
        try:
            if is_container():
                return True
            if is_cl_solo_edition(skip_jwt_check=True):
                # Ubuntu uses standard kernel,
                # CL9 uses Alma kernel which doesn't have 'lve' in its name
                if is_ubuntu() or get_cl_version() in ["cl9", "cl10"]:
                    return True
                uname = subprocess.check_output(
                    "uname -r", shell=True, executable="/bin/bash", text=True
                )
                return "lve" in uname
            else:
                f = open("/proc/lve/list", "r")
                line = f.readline()
                f.close()
                return bool(line)
        except IOError:
            return False

def cl_statsnotifier(self):
        from lvestats.lib.cloudlinux_statsnotifier import main  # pylint: disable=E0401

list_to_request = self.prepair_params_for_command(with_json=True)
        exit_code = main(args_=list_to_request)  # pylint: disable=E0401
        sys.exit(exit_code)

def cloudlinux_awp_user(self):
        cli_command = "/usr/bin/cloudlinux-awp-user"
        list_to_request = self.prepair_params_for_command(with_json=False)
        result = self.run_util(cli_command, *list_to_request, ignore_errors=False)
        print(result)

def cl_install_plugin(self):
        """
        This method is needed just for dev server to allow work with mocks
        """
        self.exit_with_success()

# user cli parts

class CommandType(Enum):
    HEAVY = "heavy"
    SIMPLE = "simple"

class ConfigLimitValue(Enum):
    ALL = "all"  # limit all requests
    HEAVY = "heavy"  # don't limit white-listed 'simple' requests
    UNLIMITED = "unlimited"  # don't limit at all

@classmethod
    def _missing_(cls, value):
        return cls.ALL

@dataclass
class Rule:
    callable: Callable
    result: CommandType

class LimitStrategyBase:
    """
    Base limits strategy to decide - run incoming request with or without cagefs limits
    Strategy execution means that used script (cloudlinux_cli_user.py) will be re-executed with (or not)
        additional enter flags for the selected utility
    """

enter_flags: EnterFlags
    enter_tool: EnterTool = (
        EnterTool.CAGEFS_ENTER_PROXIED
    )  # Default to cagefs_enter.proxied

def execute(
        self, uid: int, command: str, args: List[str], request_data: dict
    ) -> Optional[int]:
        full_command = self.get_full_command(uid, command, args, request_data)
        p = subprocess.Popen(full_command)
        p.communicate()
        return p.returncode

def get_full_command(
        self, uid: int, command: str, args: List[str], request_data: dict
    ) -> List[str]:
        cmd = [*sys.argv, f"--skip-cagefs-check"]

if self.enter_tool == EnterTool.LVE_SUWRAPPER:
            return [
                LVE_SUWRAPPER_BIN,
                "-n",  # bypass cagefs namespace
                *self.enter_flags.to_lve_suwrapper_args(),
                str(uid),
                *cmd,
            ]
        else:
            return [CAGEFS_ENTER_PROXIED_BIN, *self.enter_flags.to_cagefs_args(), *cmd]

class BypassStrategy(LimitStrategyBase):
    """
    Strategy which bypasses both lve and
    cagefs and executes commands direcly.
    """

def execute(
        self, uid: int, command: str, args: List[str], request_data: dict
    ) -> Optional[int]:
        return

class AllLimitStrategy(LimitStrategyBase):
    """
    Strategy to limit all commands
    """

enter_flags = EnterFlags.all_limits()

class NoLimitStrategy(LimitStrategyBase):
    """
    Strategy to don't limit all commands
    """

enter_flags = EnterFlags.no_limits()

class LimitStrategyHeavy(LimitStrategyBase):
    """
    Strategy to don't limit whitelisted commands
    By default - all commands are HEAVY and will be limited
    Add `rules` to mark any command as SIMPLE and run without limits
    """

enter_flags = EnterFlags.all_limits()

default_rule = Rule(callable=lambda args: True, result=CommandType.HEAVY)
    rules = {
        "cloudlinux-selector": [
            Rule(callable=lambda args: "get" in args, result=CommandType.SIMPLE),
            Rule(callable=lambda args: "start" in args, result=CommandType.SIMPLE),
            Rule(callable=lambda args: "restart" in args, result=CommandType.SIMPLE),
            Rule(callable=lambda args: "stop" in args, result=CommandType.SIMPLE),
        ],
        # the following lve-stats utilities allow user to monitor his load
        # they should be available disregarding the load on the server
        "cloudlinux-top": [
            Rule(callable=lambda args: True, result=CommandType.SIMPLE),
        ],
        "cloudlinux-statistics": [
            Rule(callable=lambda args: True, result=CommandType.SIMPLE),
        ],
        "cloudlinux-charts": [
            Rule(callable=lambda args: True, result=CommandType.SIMPLE),
        ],
        "spa-get-user-info": [
            Rule(callable=lambda args: True, result=CommandType.SIMPLE),
        ],
    }

def _check_rules(self, command: str, args: List[str]) -> CommandType:
        command_type = None
        for rule in self.rules.get(command, []) + [self.default_rule]:
            if rule.callable(args):
                command_type = rule.result
                break
        if command_type == CommandType.SIMPLE:
            self.enter_flags = EnterFlags.no_limits()
        else:
            self.enter_flags = EnterFlags.all_limits()
        return command_type

def get_full_command(
        self, uid: int, command: str, args: List[str], request_data: dict
    ) -> List[str]:
        self._check_rules(command, args)
        return super().get_full_command(uid, command, args, request_data)

Name	Type	Size	Owner/Group	Permission	Last Modified	Actions
.	dir	-	root/root	0755	2026-02-28 06:00:58
..	dir	-	root/root	0755	2026-02-28 06:00:58
activate	text/x-shellscript	2.3 KB	root/linksafe	0755	2026-02-17 11:12:22
cloudlinux-cli-user.py	text/plain	491 B	root/root	0755	2026-02-17 11:12:22
cloudlinux-selector.py	text/plain	654 B	root/root	0755	2026-02-17 11:12:22
cloudlinux_cli_user.py	text/x-python	11.99 KB	root/root	0644	2026-02-17 11:12:22
cpanel_api.py	text/x-python	9.76 KB	root/root	0644	2026-02-17 11:12:22
libcloudlinux.py	text/x-python	32 KB	root/root	0644	2026-02-17 11:12:22
node_wrapper	text/x-shellscript	268 B	root/linksafe	0755	2026-02-17 11:12:22
npm_wrapper	text/x-shellscript	1.69 KB	root/linksafe	0755	2026-02-17 11:12:22
python_wrapper	text/x-shellscript	568 B	root/linksafe	0755	2026-02-17 11:12:22
set_env_vars.py	text/plain	3.66 KB	root/linksafe	0755	2026-02-17 11:12:22

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