XMAN Replicator

Path: /opt/cloudlinux/venv/lib/python3.11/site-packages/clselect/

Name	Size	Rights	Date	Actions
[.]	<DIR>	drwxr-xr-x	2026-06-17 05:00	🔄 🗑️ 🗑️📁 ⬇️ 🔒
[..]	<DIR>	drwxr-xr-x	2026-06-17 05:00	🔄 🗑️ 🗑️📁 ⬇️ 🔒
__init__.py	536 B	-rw-r--r--	2026-05-28 09:16	✏️ 🔄 🗑️ ⬇️ 🔒
[__pycache__]	<DIR>	drwxr-xr-x	2026-06-17 07:57	🔄 🗑️ 🗑️📁 ⬇️ 🔒
[baseclselect]	<DIR>	drwxr-xr-x	2026-06-17 05:00	🔄 🗑️ 🗑️📁 ⬇️ 🔒
clextselect.py	20,076 B	-rw-r--r--	2026-05-28 09:16	✏️ 🔄 🗑️ ⬇️ 🔒
clpassenger.py	28,502 B	-rw-r--r--	2026-05-28 09:16	✏️ 🔄 🗑️ ⬇️ 🔒
clselect.py	22,491 B	-rw-r--r--	2026-05-28 09:16	✏️ 🔄 🗑️ ⬇️ 🔒
clselectctl.py	10,286 B	-rw-r--r--	2026-05-28 09:16	✏️ 🔄 🗑️ ⬇️ 🔒
clselectctlnodejsuser.py	22,877 B	-rw-r--r--	2026-05-28 09:16	✏️ 🔄 🗑️ ⬇️ 🔒
clselectctlphp.py	47,018 B	-rw-r--r--	2026-05-28 09:16	✏️ 🔄 🗑️ ⬇️ 🔒
clselectctlpython.py	49,014 B	-rw-r--r--	2026-05-28 09:16	✏️ 🔄 🗑️ ⬇️ 🔒
clselectctlruby.py	19,033 B	-rw-r--r--	2026-05-28 09:16	✏️ 🔄 🗑️ ⬇️ 🔒
clselectdomains.py	4,706 B	-rw-r--r--	2026-05-28 09:16	✏️ 🔄 🗑️ ⬇️ 🔒
clselectexcept.py	10,466 B	-rw-r--r--	2026-05-28 09:16	✏️ 🔄 🗑️ ⬇️ 🔒
[clselectnodejs]	<DIR>	drwxr-xr-x	2026-06-17 05:00	🔄 🗑️ 🗑️📁 ⬇️ 🔒
[clselectnodejsuser]	<DIR>	drwxr-xr-x	2026-06-17 05:00	🔄 🗑️ 🗑️📁 ⬇️ 🔒
[clselectphp]	<DIR>	drwxr-xr-x	2026-06-17 05:00	🔄 🗑️ 🗑️📁 ⬇️ 🔒
[clselectphpuser]	<DIR>	drwxr-xr-x	2026-06-17 05:00	🔄 🗑️ 🗑️📁 ⬇️ 🔒
clselectprint.py	5,515 B	-rw-r--r--	2026-05-28 09:16	✏️ 🔄 🗑️ ⬇️ 🔒
[clselectpython]	<DIR>	drwxr-xr-x	2026-06-17 05:00	🔄 🗑️ 🗑️📁 ⬇️ 🔒
[clselectpythonuser]	<DIR>	drwxr-xr-x	2026-06-17 05:00	🔄 🗑️ 🗑️📁 ⬇️ 🔒
[clselectruby]	<DIR>	drwxr-xr-x	2026-06-17 05:00	🔄 🗑️ 🗑️📁 ⬇️ 🔒
clselectstatistics.py	3,897 B	-rw-r--r--	2026-05-28 09:16	✏️ 🔄 🗑️ ⬇️ 🔒
cluserextselect.py	16,936 B	-rw-r--r--	2026-05-28 09:16	✏️ 🔄 🗑️ ⬇️ 🔒
cluseroptselect.py	26,403 B	-rw-r--r--	2026-05-28 09:16	✏️ 🔄 🗑️ ⬇️ 🔒
cluserselect.py	31,369 B	-rw-r--r--	2026-05-28 09:16	✏️ 🔄 🗑️ ⬇️ 🔒
locked_extensions.ini	1,230 B	-rw-r--r--	2026-05-28 09:16	✏️ 🔄 🗑️ ⬇️ 🔒
models.py	815 B	-rw-r--r--	2026-05-28 09:16	✏️ 🔄 🗑️ ⬇️ 🔒
utils.py	16,755 B	-rw-r--r--	2026-05-28 09:16	✏️ 🔄 🗑️ ⬇️ 🔒

Edit: cluserselect.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 absolute_import
from __future__ import division
import json
import os
import sys
import uuid
import signal
import secureio
from future.moves import configparser as ConfigParser
from stat import S_IRUSR, S_IWUSR, S_IRGRP, S_IROTH
from future.utils import iteritems
from pathlib import Path
import psutil

from .clselect import ClSelect
from .clselectexcept import ClSelectExcept
from clcommon import ClPwd, clcaptain
from .clselectprint import clprint
from . import utils
from clcommon import clcagefs
from clcommon.utils import ExternalProgramFailed
from clcommon.cpapi import docroot, domain_owner, userdomains
from clcommon.cpapi.cpapiexceptions import NoDomain, NoPanelUser

try:
    from clcagefslib.const import BASEDIR
    from clcagefslib.fs import get_user_prefix
    from clcagefslib.selector.configure import is_ea4_enabled, read_cpanel_ea4_php_conf, configure_alt_php
    from clcagefslib.selector.panel.da import da_change_user_php_ini
except ImportError:
    pass

try:
    from clcagefslib.webisolation.jail_utils import get_website_id
    from clcagefslib.webisolation.config import load_user_config
except ImportError:
    get_website_id = lambda _: None
    load_user_config = None

class ClUserSelect(ClSelect):
    CAGEFS_PATH = "/var/cagefs"
    SELECTOR_PATH = "/usr/selector"
    NATIVE_PATH = SELECTOR_PATH if clcagefs.in_cagefs() else "/usr/share/cagefs-skeleton/usr/selector"
    CAGEFS_EXCLUDE = "/etc/cagefs/exclude"
    SELECTOR2_DIR = ".cl.selector/selector.path"

def clean_crui_images(self, users=None):
        """
        Creates flags mod_lsapi_reset_me in users' home directories in order
        to recreate CRIU images when php version/extensions/options have changed
        For details see LVEMAN-1210
        :param users: list of usernames (strings)
        """

# There is not reliable way to check if CRIU is enabled inside CageFS
        # So let's always create the "mod_lsapi_reset_me" flag
        if not clcagefs.in_cagefs() and not os.path.isfile("/var/run/mod_lsapi/criu.enabled"):
            return
        for user in users:
            pw = self._clpwd.get_pw_by_name(user)
            path = os.path.join(pw.pw_dir, "mod_lsapi_reset_me")
            if not os.path.isfile(path):
                previous_user_data = self._change_uid(user)
                try:
                    clcaptain.write(path)
                except (OSError, ExternalProgramFailed) as e:
                    raise ClSelectExcept.UnableToSaveData(path, e)
                finally:
                    ClUserSelect._restore_uid(previous_user_data)

@staticmethod
    def switch_symlink_for_alt_php(version, pw, document_root=None, exit_on_error=True, configure_multiphp=True):
        """
        Switch symlink for alt php.
        Create .cagefs directory if not created
        Rerurn True if error has occured
        """
        if not os.path.isdir(BASEDIR) and not clcagefs.in_cagefs():
            print("ERROR: CageFS not installed.")
            if exit_on_error:
                sys.exit(1)
            else:
                return True

if configure_multiphp and is_ea4_enabled():
            conf = read_cpanel_ea4_php_conf()
            if conf:
                try:
                    # get default system php version selected via MultiPHP Manager in cPanel WHM
                    default_php = conf["default"]
                    # LVEMAN-1170: do not configure PHP Selector when system default version is alt-php
                    if not default_php.startswith("ea-php"):
                        print(
                            "ERROR: system default PHP version is alt-php. "
                            "PHP Selector is disabled. Use cPanel MultiPHP manager instead."
                        )
                        if exit_on_error:
                            sys.exit(1)
                        else:
                            return True
                except KeyError:
                    pass

# configure alt php - create .cagefs dir and create symlink
        error = configure_alt_php(
            pw, version, document_root,
            write_log=False,
            drop_perm=(os.geteuid() == 0),
            configure_multiphp=configure_multiphp
        )
        if error and exit_on_error:
            sys.exit(1)

# When setting global version (document_root=None), sync isolated websites
        # that don't have per-domain PHP Selector enabled so they follow user-level settings
        if not document_root and load_user_config is not None:
            isolated_domains = set(load_user_config(pw.pw_name).enabled_websites)

# in some tests (e.g selectorctl.backup.robot) user is created just via useradd ->
            # plesk cpapi raises NoPanelUser
            try:
                target_domains = userdomains(pw.pw_name)
            except NoPanelUser:
                target_domains = []

for domain, domain_docroot in target_domains:
                if domain not in isolated_domains:
                    continue

configure_alt_php(
                    pw, version, domain_docroot,
                    write_log=False,
                    drop_perm=(os.geteuid() == 0),
                    configure_multiphp=configure_multiphp
                )

return error

def apply_symlinks_rules(self):
        if self.without_cagefs:
            print('ERROR: this option does not work in "single user" mode (when CageFS is disabled)')
            sys.exit(1)
        if os.geteuid() != 0:
            print("ERROR: root privileges required")
            sys.exit(1)
        users_vers_dict = self.get_user_version_map()
        for user, version in iteritems(users_vers_dict):
            print("Processing user", user)
            pw = self._clpwd.get_pw_by_name(user)
            ClUserSelect.switch_symlink_for_alt_php(version, pw, exit_on_error=False, configure_multiphp=False)

def __init__(self, item="php", exclude_pid_list=None):
        ClSelect.__init__(self, item)
        self._clpwd = ClPwd()
        self._user_excludes = set()
        if exclude_pid_list:
            self.exclude_pid_list = exclude_pid_list
        else:
            self.exclude_pid_list = []

def get_version(self, user, domain=None, show_native_version=False):
        """
        Returns alternative version for a user
        @param user: string
        @return: string
        """
        self._check_user_in_cagefs(user)
        alt_path = self._compose_user_alt_path(user)
        if domain:
            document_root = docroot(domain)[0]
            alt_path = self._compose_user_alt_path(user, document_root)
            if not os.path.isdir(alt_path):
                alt_path = self._compose_user_alt_path(user)
        native = self._compose_native_info(show_native_version)
        if not os.path.isdir(alt_path):
            return native
        alternatives = self.get_all_alternatives_data()
        full_path = os.path.join(alt_path, self._item)
        if not os.path.islink(full_path):
            return native
        link_dst = os.readlink(full_path)
        if self.without_cagefs:
            if not self._native_contents:
                self._load_native_contents(self._item)
            if link_dst == self._native_contents[self._item]:
                return native
        if os.path.dirname(link_dst) == self.SELECTOR_PATH:
            return native
        try:
            version = list(
                filter((lambda i: alternatives[i]["data"][self._item] == link_dst), list(alternatives.keys()))
            )[0]
            return (version, alternatives[version]["version"], alternatives[version]["data"][self._item])
        except (IndexError, KeyError):
            return native

def create_dir(self, path, user):
        if not os.path.isdir(path):
            previous_user_data = self._change_uid(user)
            try:
                clcaptain.mkdir(path)
            except (OSError, ExternalProgramFailed) as e:
                raise ClSelectExcept.UnableToSaveData(path, e)
            finally:
                ClUserSelect._restore_uid(previous_user_data)

def create_selector_symlinks(self, user):
        """
        Creates additional directory and symlinks for use in "without CageFS" mode
        """
        homedir = self._clpwd.get_homedir(user)
        path_in_home = os.path.join(homedir, self.SELECTOR2_DIR)
        cur_user = self._change_uid(user)
        self.create_dir(path_in_home, user)
        self._create_symlink("../php-cli", path_in_home + "/php", check_existence=True)
        self._create_symlink("../php", path_in_home + "/php-cgi", check_existence=True)
        self._restore_uid(cur_user)

def get_default_version(self):
        if os.path.isfile(ClSelect.DEFAULTS_PATH):
            try:
                return self._dh.get("versions", self._item)
            except (ConfigParser.Error, IOError, KeyError):
                return "native"
        return "native"

def set_version_from_backup(self, user):
        user_backup_path = os.path.join(self._clpwd.get_homedir(user), ".cl.selector", "defaults.cfg")
        if not os.path.isfile(user_backup_path):
            self.set_version(user, self.get_default_version())
        else:
            try:
                dh = self._get_default_config_handler(user_backup_path)
                self.set_version(user, dh.get("versions", self._item))
            except (ConfigParser.Error, IOError, KeyError) as e:
                print("Error while restoring settings from backup", str(e))
                sys.exit(1)

def _version_enabled(self, version):
        """"
        Checks if version is enabled,
        a version is considered "enabled" if there is no "state" option in the config.
        The presence of the "state" option always means it is disabled, regardless of its value.

@param version: string
        @return: bool - True if version is enabled, False otherwise
        """
        if not self._dh.has_option("%s%s" % (self._item, version), "state"):
            return True
        else:
            return False

def set_version(self, user, version,
                    domain=None, return_summary=False, show_native_version=False, exit_on_error=True):
        """
        Sets alternative version for a users with the same uid
        @param user: string
        @return: None
        """
        if os.geteuid() != 0 and (message := self.get_version_selection_disabled_msg(user)):
            raise ClSelectExcept.VersionModificationBlocked(message)

# This check is needed to prevent setting a disabled version as selected version for a user
        if not self._version_enabled(version):
            raise ClSelectExcept.VersionModificationBlocked('Version %s is disabled by administrator' % version)

if domain:
            try:
                owner = domain_owner(domain)
            except NoDomain:
                owner = None
            if owner != user:
                raise ClSelectExcept.SelectorException("Domain %s does not belong to user %s" % (domain, user))

data = utils.apply_for_at_least_one_user(
            self._set_version,
            self._clpwd.get_names(self._clpwd.get_uid(user)),
            ClSelectExcept.NoUserSelector,
            version,
            domain,
            return_summary,
            show_native_version,
            exit_on_error,
        )

if return_summary:
            return data

def _set_version(self, user, version, domain=None, return_summary=False, show_native_version=False, exit_on_error=True):
        """
        Sets alternative version for a user
        @param user: string
        @return: None
        """
        if self.without_cagefs:
            previous_user_data = self._change_uid(user)
        self._check_user_in_cagefs(user)
        document_root = ""
        if domain:
            document_root = docroot(domain)[0]
        alt_path = self._compose_user_alt_path(user, document_root)
        if not os.path.isdir(alt_path):
            if self.without_cagefs or domain:
                self.create_dir(alt_path, user)
            else:
                raise ClSelectExcept.NoUserSelector(user)
        alternatives = self.get_all_alternatives_data()
        if version not in alternatives and version != "native":
            raise ClSelectExcept.NoSuchAlternativeVersion(version)
        self._remove_alternatives_links(alt_path)
        pw = self._clpwd.get_pw_by_name(user)
        if version == "native":
            if self.without_cagefs:
                if not self._native_contents:
                    self._load_native_contents(self._item)
                for item, native_path in iteritems(self._native_contents):
                    self._create_symlink(native_path, alt_path + "/" + item, user, version)
            else:
                ini = "php.ini"
                new_ini_created = False
                new_ini_path = os.path.join("%s.etc" % (self.NATIVE_PATH,), ini)
                if os.path.exists(new_ini_path):
                    src = os.path.join("%s.etc" % self.SELECTOR_PATH, ini)
                    dst = os.path.join(alt_path, ini)
                    self._create_symlink(src, dst, user, version)
                    new_ini_created = True
                for filename in os.listdir(self.NATIVE_PATH):
                    if self._item not in filename:
                        continue
                    if filename.endswith(".ini") and new_ini_created:
                        continue
                    dst = os.path.join(alt_path, filename)
                    src = os.path.join(self.SELECTOR_PATH, filename)
                    self._create_symlink(src, dst, user, version)
        else:
            for item, path in iteritems(alternatives[version]["data"]):
                self._create_symlink(path, os.path.join(alt_path, item), user, version)

if self.without_cagefs:
            ClUserSelect._restore_uid(previous_user_data)
        else:
            ClUserSelect.switch_symlink_for_alt_php(version, pw,
                                                    document_root=document_root,
                                                    exit_on_error=exit_on_error)
            self._switch_php_da_isp(user, version)
        self._reload_processes(user)
        self._backup_settings(user)

if return_summary:
            return self.get_summary(user, show_native_version)

def get_version_selection_disabled_msg(self, username: str) -> str:
        """
        Returns a message indicating that the selection of the PHP version
        is disabled for the user, based on the configuration file.

Args:
            username (str): The username for which to check the configuration.

Returns:
            str: The message indicating that version selection is disabled,
                 or an empty string if the configuration file does not exist
                 or does not contain the message.
        """
        uid = self._clpwd.get_uid(username)
        config_file = Path(f"/var/cloudlinux/cl.selector/uids/{uid}/version_selection_conf.json")
        if not config_file.exists():
            return ""

try:
            with config_file.open(encoding="utf-8") as f:
                config_data = json.load(f)
                return config_data.get("version_selection_disabled_msg", "")
        except (OSError, ValueError):
            return ""

def get_summary(self, user, show_native_version=False):
        """
        Returns a summary of available alternative versions for the given user.

Only versions that are enabled, default, or selected are included.
        The label for the "native" version is replaced if show_native_version is True.

@param user: str - Username inside CageFS.
        @param show_native_version: bool - Whether to replace the 'native' version label.
        @return: tuple of (str, (bool, bool, bool)) - Each entry contains the version name and a tuple with flags:
            (enabled, default, selected).
        """
        self._check_user_in_cagefs(user)
        # Retrieve all alternatives data and "native"
        alternatives = self.get_all_alternatives_data()
        native_info = self._compose_native_info(show_native_version)
        summary = {"native": {"enabled": True, "default": False, "selected": False}}
        alt_versions = sorted(alternatives.keys())
        alt_versions.append("native")
        selected_version = self.get_version(user)[0]
        # Populate summary with alternative versions
        for version in alt_versions:
            if version not in summary:
                summary[version] = {}
            summary[version]["enabled"] = self._version_enabled(version)
            summary[version]["default"] = False
            summary[version]["selected"] = False
        try:
            default_version = self._dh.get("versions", self._item)
        except (ConfigParser.NoSectionError, ConfigParser.NoOptionError):
            default_version = "native"
        try:
            summary[default_version]["default"] = True
            summary[selected_version]["selected"] = True
        except KeyError:
            raise ClSelectExcept.NoSuchAlternativeVersion(default_version)
        summary[native_info[0]] = summary.pop("native")
        alt_versions.remove("native")
        alt_versions.append(native_info[0])
        result = [] # Final list for summary output
        # Include only versions where at least one flag is True
        for idx, v in enumerate(alt_versions):
            if not any((summary[v]["enabled"], summary[v]["default"], summary[v]["selected"])):
                continue

result.append((v, (summary[v]["enabled"], summary[v]["default"], summary[v]["selected"])))

return tuple(result)

def change_to_version(self, new_version, current_version):
        """
        Changes users of a supplied version to specified_version
        @param version: string
        @param current_version: string
        """
        users = self.list_users(current_version)
        for user in users:
            try:
                self.set_version(user, new_version, exit_on_error=False)
            except Exception as e:  # catch every errors, print it and go to the next user
                clprint.print_diag("text", {"status": "ERROR", "message": str(e)})
                pass
        self.clean_crui_images(users)

def list_users(self, version):
        """
        Returns users of a certain alternative
        """
        data = self.get_version_user_map()
        if version in data:
            return data[version]
        return []

def list_all_users(self):
        """
        Returns all valid system users
        @return: list
        """
        if self.without_cagefs:
            from .clselectctlphp import get_cpanel_user

return [get_cpanel_user()]
        return list(self._get_system_users().difference(self._get_user_excludes()))

def cagefs_copy_etc(self, user):
        config = dict()
        config["init"] = 0
        config["reinit"] = 0
        config["verbose"] = 0
        LIBDIR = "/usr/share/cagefs"
        sys.path.append(LIBDIR)

try:
            import cagefsctl
        except ImportError:
            print("ERROR: CageFS not installed.")
            sys.exit(1)

cagefs_etc_path = os.path.join(BASEDIR, get_user_prefix(user), user, "etc")
        if not os.path.exists(cagefs_etc_path + "/cl.selector") or not os.path.exists(cagefs_etc_path + "/cl.php.d"):
            cagefsctl.cpetc_for_user(user, config)

def get_user_version_map(self):
        """
        Returns user version map as dict
        @return: dict
        """
        actual_users = self.list_all_users()
        data = {}
        for user in actual_users:
            try:
                data[user] = self.get_version(user, False)[0]
            except ClSelectExcept.NotCageFSUser:
                continue
        return data

def get_version_user_map(self, user_names=None, domain=None):
        """
        Returns users grouped by version
        @return: dict
        """
        actual_users = user_names or self.list_all_users()
        data = {}
        for user in actual_users:
            try:
                version = self.get_version(user, domain, False)[0]
                if not version in data:
                    data[version] = []
                data[version].append(user)
            except ClSelectExcept.NotCageFSUser:
                continue
        return data

def _create_symlink(src, dst, user=None, version=None, check_existence=False):
        """
        Creates symlink from src to dst
        @param src: string
        @param dst: string
        @param user: string
        @param version: string
        @param check_existence: bool
        @return: None
        """
        try:
            if check_existence:
                if os.path.islink(dst):
                    if os.readlink(dst) != src:
                        os.unlink(dst)
                    else:
                        return
                else:
                    utils.remove_file_or_dir(dst)
            clcaptain.symlink(src, dst)
        except Exception as e:
            if user is not None and version is not None:
                raise ClSelectExcept.UnableToSetAlternative(user, version, e)
            raise ClSelectExcept.SelectorException("Cannot create symlink from %s to %s (%s)" % (src, dst, e))

_create_symlink = staticmethod(_create_symlink)

def _get_user_excludes(self):
        """
        Returns list of user excludes
        @return: list
        """
        if self._user_excludes:
            return self._user_excludes
        if not os.path.isdir(self.CAGEFS_EXCLUDE):
            return set()
        for item in os.listdir(self.CAGEFS_EXCLUDE):
            full_item_path = os.path.join(self.CAGEFS_EXCLUDE, item)
            self._user_excludes.update(
                set(map((lambda x: x.strip()), utils.read_file_as_string(full_item_path).splitlines()))
            )
        return self._user_excludes

def _check_user_in_cagefs(self, user):
        """
        Check that cagefs enabled for user
        """
        if self.without_cagefs:
            return

if clcagefs.in_cagefs():
            return

LIBDIR = "/usr/share/cagefs"
        sys.path.append(LIBDIR)
        try:
            import cagefsctl
        except ImportError:
            print("ERROR: CageFS not installed.")
            sys.exit(1)
        try:
            if not cagefsctl.is_user_enabled(user):
                raise ClSelectExcept.NotCageFSUser(user)
        except AttributeError:
            print("ERROR: CageFS version is unsupported. Please update CageFS.")
            sys.exit(1)

def _remove_alternatives_links(self, path):
        """
        Removes all symlinks from directory
        @param path: string
        @return: None
        """
        for filename in os.listdir(path):
            if self._item not in filename:
                continue
            full_path = os.path.join(path, filename)
            if not os.path.islink(full_path):
                continue
            os.unlink(full_path)

def _compose_user_alt_path(self, user, document_root=None):
        """
        Composes and returns user alternative directory path
        @param user: string
        @return: string
        """
        if self.without_cagefs:
            homedir = self._clpwd.get_homedir(user)
            return homedir + "/.cl.selector"
        uid = str(self._clpwd.get_uid(user))
        document_root_id = ""
        if document_root:
            document_root_id = get_website_id(document_root) if document_root else ""
        base = (
            os.path.join(self.CAGEFS_PATH, uid[-2:], user, "etc", "cl.selector")
            if not clcagefs.in_cagefs()
            else "/etc/cl.selector"
        )

return os.path.join(base, document_root_id) if document_root_id else base

def _get_system_users(self):
        """
        Returns set of system users
        @return: set
        """
        users_dict = self._clpwd.get_user_dict()
        return set(users_dict.keys())

def _delete_if_symlink(file_path):
        """
        Deletes file to be written if it is a symlink
        """
        if os.path.islink(file_path):
            try:
                os.unlink(file_path)
            except OSError:
                raise ClSelectExcept.UnableToSaveData(file_path, "Cannot delete symlink while saving data")

_delete_if_symlink = staticmethod(_delete_if_symlink)

def _change_uid(self, user):
        """
        Changes to another uid and returns tuple of previous euid and egid
        @param user: string
        @return: tuple
        """
        entry = self._clpwd.get_pw_by_name(user)
        new_uid = entry.pw_uid
        new_gid = entry.pw_gid
        cur_euid = os.geteuid()
        cur_egid = os.getegid()
        if cur_euid == new_uid:
            return cur_euid, cur_egid
        try:
            os.setegid(new_gid)
            os.seteuid(new_uid)
            secureio.set_capability()
            return cur_euid, cur_egid
        except OSError as e:
            raise ClSelectExcept.UnableToChangeToAnotherUser(user, e)

def _restore_uid(uid_and_gid):
        """
        Restores changed uid and gid to original ones
        @param uid_and_gid: tuple
        @return: None
        """
        if uid_and_gid[0] != os.geteuid():
            secureio.set_capability(clear=True)
            try:
                os.setegid(uid_and_gid[1])
                os.seteuid(uid_and_gid[0])
            except OSError as e:
                raise ClSelectExcept.UnableToChangeToAnotherUser(str(uid_and_gid[0]), e)

_restore_uid = staticmethod(_restore_uid)

def _write_to_file(self, user, file_contents, file_path, create=True):
        """
        Saves data to file
        @param user: string
        @param file_contents: string
        @param file_path: string
        @return: None
        """
        previous_user_data = self._change_uid(user)
        try:
            if not create and not os.path.exists(file_path):
                return
            self._delete_if_symlink(file_path)
            file_directory = os.path.dirname(file_path)
            try:
                # Replace tempfile.mkstemp with str(uuid.uuid4())
                dirname = "clseltmp_%s" % str(uuid.uuid4())
                temp_path = os.path.join(file_directory, dirname)
                clcaptain.write(temp_path, "%s\n" % (file_contents,))
            except (IOError, OSError, ExternalProgramFailed) as e:
                try:
                    if os.path.exists(temp_path):
                        os.unlink(temp_path)
                except:
                    pass
                raise ClSelectExcept.UnableToSaveData(file_path, e)
            else:
                try:
                    mask = S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH
                    os.rename(temp_path, file_path)
                    os.chmod(file_path, mask)
                except OSError:
                    pass
        finally:
            ClUserSelect._restore_uid(previous_user_data)

def _reload_processes(self, user):
        """
        Reloads user process
        """
        try:
            next_parent = psutil.Process()
            for i in range(2):
                next_parent = next_parent.parent()
                if next_parent is not None:
                    self.exclude_pid_list.append(next_parent.pid)
                else:
                    break
        except psutil.NoSuchProcess:
            pass
        try:
            uid = ClPwd().get_uid(user)
        except (ClPwd.NoSuchUserException,):
            # no such user
            return
        try:
            for proc in psutil.process_iter():
                try:
                    if uid not in [proc.uids().real, proc.uids().effective] or proc.name().find(self._item) == -1:
                        continue
                    pid = proc.pid
                except psutil.NoSuchProcess:
                    continue
                try:
                    if pid not in self.exclude_pid_list:
                        os.kill(pid, signal.SIGHUP)
                except (OSError,):
                    continue
        except (OSError, IOError):
            # psutil reads /proc FS as usual FS, skip read errors
            pass

def _skim_over_extensions(path):
        """
        Get extension names from user extensions file comments
        """
        extensions = []
        try:
            ini = open(path)
            for line in ini:
                if line.startswith(";---"):
                    ext = line[4 : line.rfind("---")]
                    extensions.append(ext)
            ini.close()
        except (OSError, IOError):
            pass
        return extensions

_skim_over_extensions = staticmethod(_skim_over_extensions)

def _backup_settings(self, user):
        """
        Scans all user settings and backups'em in homedir as INI file
        @param user: string
        """
        self._check_user_in_cagefs(user)
        backup_contents = []
        user_alt_path = self._compose_user_alt_path(user)
        user_ext_path = os.path.join(os.path.dirname(user_alt_path), "cl.php.d")
        alternatives = self.get_all_alternatives_data()
        user_backup_path = os.path.join(self._clpwd.get_homedir(user), ".cl.selector")
        if not os.path.isdir(user_backup_path):
            previous_user_data = self._change_uid(user)
            try:
                clcaptain.mkdir(user_backup_path)
            except (OSError, ExternalProgramFailed) as e:
                ClUserSelect._restore_uid(previous_user_data)
                raise ClSelectExcept.UnableToSaveData(user_backup_path, e)
            ClUserSelect._restore_uid(previous_user_data)
        user_backup_file = os.path.join(user_backup_path, "defaults.cfg")
        if os.path.isdir(user_alt_path):
            version = "[versions]\n%s = %s\n" % (self._item, self.get_version(user)[0])
        else:
            version = "[versions]\n%s = native\n" % (self._item,)
        backup_contents.append(version)
        for alt in sorted(alternatives.keys()):
            if self.without_cagefs:
                curr_ext_path = user_alt_path + "/alt_php" + alt.replace(".", "") + ".ini"
            else:
                curr_ext_path = os.path.join(user_ext_path, "alt-php%s" % ((alt.replace(".", ""),)), "alt_php.ini")
            extensions = self._skim_over_extensions(curr_ext_path)
            backup_contents.append("[%s%s]\nmodules = %s\n" % (self._item, alt, ",".join(sorted(extensions))))
        self._write_to_file(user, "\n".join(backup_contents), user_backup_file)

def _switch_php_da_isp(self, user, version):
        if self.without_cagefs:
            return
        da_change_user_php_ini(user, version)

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