import pwd
import grp
import os
import multiprocessing

# CHANGE ME
USERNAME = None


def check_permission(path):
    username = USERNAME
    pw_entry = pwd.getpwnam(username)
    gr_entry = grp.getgrgid(pw_entry.pw_gid)
    uid = pw_entry.pw_uid
    primary_gid = gr_entry.gr_gid
    secondary_gids = os.getgrouplist(username, primary_gid)

    print((path, (os.getgid(), os.getuid(), os.getgroups())))
    os.setgid(primary_gid)
    os.setgroups(secondary_gids)
    os.setuid(uid)


def test_users_have_read_only_access_to_logs():
    files_to_check = 'ABCDEFGHIJKLMN'
    with multiprocessing.Pool(processes=5) as p:
        p.map(check_permission, files_to_check)


if __name__ == '__main__':
    test_users_have_read_only_access_to_logs()