mirror of
https://github.com/ArchiveBox/ArchiveBox
synced 2024-11-22 20:23:12 +00:00
133 lines
4.7 KiB
Python
133 lines
4.7 KiB
Python
__package__ = 'archivebox.config'
|
|
|
|
import os
|
|
import pwd
|
|
import sys
|
|
|
|
from rich import print
|
|
|
|
from pathlib import Path
|
|
from contextlib import contextmanager
|
|
|
|
#############################################################################################
|
|
|
|
DATA_DIR = Path(os.getcwd())
|
|
|
|
try:
|
|
DATA_DIR_STAT = DATA_DIR.stat()
|
|
DATA_DIR_UID = DATA_DIR_STAT.st_uid
|
|
DATA_DIR_GID = DATA_DIR_STAT.st_gid
|
|
except PermissionError:
|
|
DATA_DIR_UID = 0
|
|
DATA_DIR_GID = 0
|
|
|
|
DEFAULT_PUID = 911
|
|
DEFAULT_PGID = 911
|
|
RUNNING_AS_UID = os.getuid()
|
|
RUNNING_AS_GID = os.getgid()
|
|
EUID = os.geteuid()
|
|
EGID = os.getegid()
|
|
SUDO_UID = int(os.environ.get('SUDO_UID', 0))
|
|
SUDO_GID = int(os.environ.get('SUDO_GID', 0))
|
|
USER: str = Path('~').expanduser().resolve().name
|
|
|
|
IS_ROOT = RUNNING_AS_UID == 0
|
|
IN_DOCKER = os.environ.get('IN_DOCKER', False) in ('1', 'true', 'True', 'TRUE', 'yes')
|
|
|
|
FALLBACK_UID = RUNNING_AS_UID or SUDO_UID
|
|
FALLBACK_GID = RUNNING_AS_GID or SUDO_GID
|
|
if RUNNING_AS_UID == 0:
|
|
try:
|
|
# if we are running as root it's really hard to figure out what the correct archivebox user should be
|
|
# as a last resort instead of setting DATA_DIR ownership to 0:0 (which breaks it for non-root users)
|
|
# check if 911:911 archivebox user exists on host system, and use it instead of 0
|
|
import pwd
|
|
if pwd.getpwuid(DEFAULT_PUID).pw_name == 'archivebox':
|
|
FALLBACK_UID = DEFAULT_PUID
|
|
FALLBACK_GID = DEFAULT_PGID
|
|
except Exception:
|
|
pass
|
|
|
|
|
|
os.environ.setdefault('PUID', str(DATA_DIR_UID or EUID or RUNNING_AS_UID or FALLBACK_UID))
|
|
os.environ.setdefault('PGID', str(DATA_DIR_GID or EGID or RUNNING_AS_GID or FALLBACK_GID))
|
|
|
|
ARCHIVEBOX_USER = int(os.environ['PUID'])
|
|
ARCHIVEBOX_GROUP = int(os.environ['PGID'])
|
|
if not USER:
|
|
try:
|
|
# alternative method 1 to get username
|
|
USER = pwd.getpwuid(ARCHIVEBOX_USER).pw_name
|
|
except Exception:
|
|
pass
|
|
|
|
if not USER:
|
|
try:
|
|
# alternative method 2 to get username
|
|
import getpass
|
|
USER = getpass.getuser()
|
|
except Exception:
|
|
pass
|
|
|
|
if not USER:
|
|
try:
|
|
# alternative method 3 to get username
|
|
USER = os.getlogin() or 'archivebox'
|
|
except Exception:
|
|
USER = 'archivebox'
|
|
|
|
ARCHIVEBOX_USER_EXISTS = False
|
|
try:
|
|
pwd.getpwuid(ARCHIVEBOX_USER)
|
|
ARCHIVEBOX_USER_EXISTS = True
|
|
except Exception:
|
|
ARCHIVEBOX_USER_EXISTS = False
|
|
|
|
|
|
#############################################################################################
|
|
|
|
def drop_privileges():
|
|
"""If running as root, drop privileges to the user that owns the data dir (or PUID)"""
|
|
|
|
# always run archivebox as the user that owns the data dir, never as root
|
|
if os.getuid() == 0:
|
|
# drop permissions to the user that owns the data dir / provided PUID
|
|
if os.geteuid() != ARCHIVEBOX_USER and ARCHIVEBOX_USER != 0 and ARCHIVEBOX_USER_EXISTS:
|
|
# drop our effective UID to the archivebox user's UID
|
|
os.seteuid(ARCHIVEBOX_USER)
|
|
|
|
# update environment variables so that subprocesses dont try to write to /root
|
|
pw_record = pwd.getpwuid(ARCHIVEBOX_USER)
|
|
os.environ['HOME'] = pw_record.pw_dir
|
|
os.environ['LOGNAME'] = pw_record.pw_name
|
|
os.environ['USER'] = pw_record.pw_name
|
|
|
|
if ARCHIVEBOX_USER == 0 or not ARCHIVEBOX_USER_EXISTS:
|
|
print('[yellow]:warning: Running as [red]root[/red] is not recommended and may make your [blue]DATA_DIR[/blue] inaccessible to other users on your system.[/yellow] (use [blue]sudo[/blue] instead)', file=sys.stderr)
|
|
|
|
|
|
@contextmanager
|
|
def SudoPermission(uid=0, fallback=False):
|
|
"""Attempt to run code with sudo permissions for a given user (or root)"""
|
|
|
|
if os.geteuid() == uid:
|
|
# no need to change effective UID, we are already that user
|
|
yield
|
|
return
|
|
|
|
try:
|
|
# change our effective UID to the given UID
|
|
os.seteuid(uid)
|
|
except PermissionError as err:
|
|
if not fallback:
|
|
raise PermissionError(f'Not enough permissions to run code as uid={uid}, please retry with sudo') from err
|
|
try:
|
|
# yield back to the caller so they can run code inside context as root
|
|
yield
|
|
finally:
|
|
# then set effective UID back to DATA_DIR owner
|
|
try:
|
|
os.seteuid(ARCHIVEBOX_USER)
|
|
except PermissionError as err:
|
|
if not fallback:
|
|
raise PermissionError(f'Failed to revert uid={uid} back to {ARCHIVEBOX_USER} after running code with sudo') from err
|