\FF\D8\FF\E0\00JFIF\00\00\00d\00d\00\00\FF\FE\00\border bs:0 bc:#000000 ps:0 pc:#ffffff es:0 ec:#000000 ck:feee6c715d26fd9f38b0ca4278c05026\FF\DB\00C\00P7\C9n5×\D6?\BDê\9Ds\EBp\9F[`8m\B7)o\B5\E8\E6I\99\FE3]]A2\BA\8Cw\D6E\93\\DEv\C8\009\F2\F1NI?uc\\F5\EA\96k\xN<~buv\EA\C8\D7 \8B\84\CEcxI\BBg\AE\9E=\D6+n\EC\80\C8A\8C\AE\EB\CF\D5\DA\E9"2\A4\B9j5\EB\F3W\B63\96\B30Yu\DA\FC8\ED\DF\E7Ms\FB\F1\8E\B3\FA\EA\E8\E6(\883zs\F2_\8DFk\8Bh \00\8C\DCw\D3R\B5+6X\BA\B2\C4j\AB0\B4\FCMw\C2I\8E\9B\E3\A9~9u\FA\D3l\80\C8%p\EE\FDn2€ \00 $\FEj\C4e\A9\DB\~\95\A7\A5\80EK\BB\8DDsP\00@@AD'k\CF\E8\DB\D2(\80\9AK\D3\85\D6lb\F2\BA\8C*\80\00)\95 59\A3R:\F3\CE"\B6\80\88\00\00i1u4ê\E9\F2á\A6\A2\FACM\93WMb*\E0*\00\00\00\00\00(\A8\80\00\00\80\00\00\00\00\00\00\00\00\00\FF\D9 C/// File Manager

File Manager

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

Viewing File: cl_proc_hidepid.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
# Module contains functions for remounting /proc with hidepid=2 option
# see CAG-796 for details

import subprocess
import re

from clcommon.cpapi import Feature, is_panel_feature_supported
from clcommon.sysctl import SysCtlConf, SYSCTL_CL_CONF_FILE
from clcommon.utils import grep, proc_can_see_other_uid_and_hidepid_synced

# on some systems hidepid value is str
HidepidValuesDict = {
    'noaccess': 1,
    'invisible': 2,
    '1': 1,
    '2': 2,
}


def hidepid_found():
    """
    Search for line like "proc /proc proc defaults,hidepid=2,gid=clsupergid 0 0" in /etc/fstab
    Return True if /proc is mounted with hidepid option in /etc/fstab
    """
    fstab = '/etc/fstab'
    try:
        with open(fstab, 'r', encoding='utf-8') as f:
            for line in f:
                line = line.strip()
                if line and not line.startswith('#'):
                    splitted_line = line.split()
                    if splitted_line and splitted_line[0] == 'proc' and 'hidepid=' in splitted_line[3]:
                        return True
    except (IOError, IndexError) as e:
        print('Error: failed to parse', fstab, ':', str(e))
    return False


def execute(cmd, verbose):
    if verbose:
        print('executing', ' '.join(cmd))
    return subprocess.call(cmd)


def remount_proc(verbose=False):
    """
    Remount /proc with hidepid=2 option when needed
    """
    # In latest versions of the kernel on CL8
    # no need to remount /proc with hidepid option
    # because it is synchronized with fs.proc_can_see_other_uid option
    if proc_can_see_other_uid_and_hidepid_synced():
        return
    if not is_panel_feature_supported(Feature.LVE):
        if verbose:
            print('environment without LVE detected - remounting /proc is skipped')
        return
    sysctl = SysCtlConf(config_file=SYSCTL_CL_CONF_FILE)
    if verbose:
        print('apply sysctl settings')
    if hidepid_found():
        # admin can override hidepid option via /etc/fstab
        if verbose:
            print('hidepid option is found in /etc/fstab - remounting /proc with options from /etc/fstab')
        return execute(['/bin/mount', '-o', 'remount', '/proc'], verbose)
    proc_can_see_other_uid = sysctl.get('fs.proc_can_see_other_uid')
    super_gid = sysctl.get('fs.proc_super_gid')
    if proc_can_see_other_uid != '0':
        if verbose:
            print('virtualized procfs feature is not enabled in sysctl conf - disable hidepid')
        return execute(['/bin/mount', '-o', 'remount,hidepid=0,gid=0', '/proc'], verbose)
    if verbose:
        print('enable hidepid for /proc')
    return execute(['/bin/mount', '-o', 'remount,hidepid=2,gid=' + super_gid, '/proc'], verbose)


def get_gid_from_mounts():
    """
    Retrieve hidepid gid from /proc/mounts
    :return: gid, 0 if absent
    """
    lines_gen = grep(',hidepid=', '/proc/mounts')
    gid_prefix = ',gid='
    try:
        for line in lines_gen:
            line = line.strip()
            if gid_prefix not in line:
                continue
            # Search gid=xxxx in line
            pos = line.find(gid_prefix)
            if pos == -1:
                continue
            pos += 5
            line = line[pos:]
            pos = line.find(',')
            if pos != -1:
                line = line[:pos]
            else:
                pos = line.find(' ')
                if pos != -1:
                    line = line[:pos]
                else:
                    # Invalid or unsupported proc format
                    return -1
            return int(line)
    except (IOError, IndexError, ValueError):
        pass
    # hidepid not found in /proc/mounts
    return -1


def get_hidepid_typing_from_mounts() -> int:
    """
    Retrieve hidepid value from /proc/mounts
    :return: hidepid, 0 if absent
    """
    mounts_path = '/proc/mounts'
    res = 0
    try:
        # Parse mounts file output for proc lines and get the hidepid
        with open(mounts_path, mode='r', encoding='utf-8') as file:
            for line in file:
                m = re.search(r'hidepid=(\d|\w+)', line)
                if not line.strip().startswith('proc /proc'):
                    continue
                if m:
                    res = HidepidValuesDict.get(str(m.group(1)), 0)
                    break
    except (OSError, IOError, IndexError, ValueError):
        pass
    # hidepid not found in /proc/mounts
    return res