1 files changed, 0 insertions, 274 deletions
diff --git a/src/writable-dirs b/src/writable-dirs
deleted file mode 100755
index 19f6094..0000000
--- a/src/writable-dirs
+++ /dev/null
@@ -1,274 +0,0 @@
-#!/usr/bin/env python3
-
-# Copyright (c) 2018 Egor Tensin <Egor.Tensin@gmail.com>
-# This file is part of the "audit-scripts" project.
-# For details, see https://github.com/egor-tensin/audit-scripts.
-# Distributed under the MIT License.
-
-import argparse
-import contextlib
-import grp
-import logging
-import logging.config
-import logging.handlers
-import multiprocessing as mp
-import os
-import pwd
-import sys
-
-
-def console_log_formatter():
-    fmt = '%(asctime)s | %(processName)s | %(levelname)s | %(message)s'
-    datefmt = '%Y-%m-%d %H:%M:%S'
-    return logging.Formatter(fmt=fmt, datefmt=datefmt)
-
-
-def console_log_level():
-    return logging.DEBUG
-
-
-def console_log_handler():
-    handler = logging.StreamHandler()
-    handler.setFormatter(console_log_formatter())
-    handler.setLevel(console_log_level())
-    return handler
-
-
-@contextlib.contextmanager
-def launch_logging_thread(queue):
-    process = mp.current_process()
-    process.name = 'scandir'
-    listener = logging.handlers.QueueListener(queue, console_log_handler())
-    listener.start()
-    try:
-        yield
-    finally:
-        listener.stop()
-
-
-@contextlib.contextmanager
-def setup_logging(queue):
-    config = {
-        'version': 1,
-        'handlers': {
-            'sink': {
-                'class': 'logging.handlers.QueueHandler',
-                'queue': queue,
-            },
-        },
-        'root': {
-            'handlers': ['sink'],
-            'level': 'DEBUG',
-        },
-    }
-    logging.config.dictConfig(config)
-    try:
-        yield
-    except Exception as e:
-        logging.exception(e)
-
-
-def validate_uid(uid):
-    try:
-        return pwd.getpwuid(uid).pw_uid
-    except KeyError:
-        return None
-
-
-def validate_gid(gid):
-    try:
-        return grp.getgrgid(gid).gr_gid
-    except KeyError:
-        return None
-
-
-def map_user_name(user_name):
-    try:
-        return pwd.getpwnam(user_name).pw_uid
-    except KeyError:
-        return None
-
-
-def map_group_name(group_name):
-    try:
-        return grp.getgrnam(group_name).gr_gid
-    except KeyError:
-        return None
-
-
-def parse_user_name(src):
-    uid = map_user_name(src)
-    if uid is None:
-        raise argparse.ArgumentTypeError('unknown user name: {}'.format(src))
-    return uid
-
-
-def parse_group_name(src):
-    gid = map_group_name(src)
-    if gid is None:
-        raise argparse.ArgumentTypeError('unknown group name: {}'.format(src))
-    return gid
-
-
-def parse_uid(src):
-    try:
-        uid = int(src)
-    except ValueError:
-        return parse_user_name(src)
-    uid = validate_uid(uid)
-    if uid is None:
-        raise argparse.ArgumentTypeError('unknown UID: {}'.format(src))
-    return uid
-
-
-def parse_gid(src):
-    try:
-        gid = int(src)
-    except ValueError:
-        return parse_group_name(src)
-    gid = validate_gid(gid)
-    if gid is None:
-        raise argparse.ArgumentTypeError('unknown GID: {}'.format(src))
-    return gid
-
-
-def get_primary_gid(uid):
-    return pwd.getpwuid(uid).pw_gid
-
-
-def parse_args(argv=None):
-    if argv is None:
-        argv = sys.argv[1:]
-    parser = argparse.ArgumentParser()
-    parser.add_argument('root_dir', default='/', nargs='?', metavar='DIR',
-                        help='set root directory')
-    parser.add_argument('--user', '-u', dest='uid', required=True,
-                        metavar='USER', type=parse_uid,
-                        help='set new process\' UID')
-    parser.add_argument('--group', '-g', dest='gid',
-                        metavar='GROUP', type=parse_gid,
-                        help='set new process\' GID')
-    args = parser.parse_args(argv)
-    if args.gid is None:
-        args.gid = get_primary_gid(args.uid)
-    return args
-
-
-def dump_process_info():
-    ruid, euid, suid = os.getresuid()
-    logging.info('User IDs:')
-    logging.info('\tReal: %d', ruid)
-    logging.info('\tEffective: %d', euid)
-    logging.info('\tSaved: %d', suid)
-    rgid, egid, sgid = os.getresgid()
-    logging.info('Group IDs:')
-    logging.info('\tReal: %d', rgid)
-    logging.info('\tEffective: %d', egid)
-    logging.info('\tSaved: %d', sgid)
-
-
-def check_root():
-    if os.getuid() == 0:
-        return True
-    logging.error('Must be run as root')
-    return False
-
-
-def scandir(dir_path):
-    try:
-        entry_it = os.scandir(dir_path)
-    except (PermissionError, FileNotFoundError) as e:
-        logging.warning('%s', e)
-        return
-    with entry_it:
-        yield from entry_it
-
-
-def enum_dirs(dir_path):
-    for entry in scandir(dir_path):
-        if entry.is_dir(follow_symlinks=False):
-            yield entry.path
-
-
-def is_writable_via_access(dir_path):
-    return os.access(dir_path, os.W_OK | os.X_OK)
-
-
-def is_writable(dir_path):
-    return is_writable_via_access(dir_path)
-
-
-def drop_privileges(uid, gid):
-    if not check_root():
-        return
-    os.setgroups([])
-    os.setgid(gid)
-    os.setuid(uid)
-    os.umask(0o77)
-
-
-@contextlib.contextmanager
-def close_queue(queue):
-    try:
-        yield
-    finally:
-        queue.put(None)
-
-
-def access_loop(access_queue, scandir_queue):
-    for dir_list in iter(access_queue.get, None):
-        denied_dir_list = []
-        for dir_path in dir_list:
-            if is_writable(dir_path):
-                logging.info('Writable: %s', dir_path)
-            else:
-                denied_dir_list.append(dir_path)
-        if not denied_dir_list:
-            break
-        scandir_queue.put(denied_dir_list)
-
-
-def access_main(args, log_queue, access_queue, scandir_queue):
-    with close_queue(scandir_queue), setup_logging(log_queue):
-        drop_privileges(args.uid, args.gid)
-        dump_process_info()
-        access_loop(access_queue, scandir_queue)
-
-
-def scandir_loop(access_queue, scandir_queue):
-    for parent_dir_list in iter(scandir_queue.get, None):
-        child_dir_list = [child_dir
-                          for parent_dir in parent_dir_list
-                          for child_dir in enum_dirs(parent_dir)]
-        if not child_dir_list:
-            break
-        access_queue.put(child_dir_list)
-
-
-def scandir_main(access_queue, scandir_queue):
-    with close_queue(access_queue):
-        if not check_root():
-            return
-        dump_process_info()
-        scandir_loop(access_queue, scandir_queue)
-
-
-def main(argv=None):
-    log_queue = mp.Queue()
-    with launch_logging_thread(log_queue), setup_logging(log_queue):
-        prog_args = parse_args(argv)
-        access_queue = mp.SimpleQueue()
-        scandir_queue = mp.SimpleQueue()
-        access_process_args = prog_args, log_queue, access_queue, scandir_queue
-        access_process = mp.Process(target=access_main,
-                                    args=access_process_args,
-                                    name='access')
-        access_queue.put([prog_args.root_dir])
-        access_process.start()
-        scandir_main(access_queue, scandir_queue)
-        access_process.join()
-
-
-if __name__ == '__main__':
-    mp.set_start_method('spawn')
-    main()