daemon.py 文件源码

def drop_privileges(user):
    '''If running as root, drop process privileges to the given user and user's main group.'''

    if os.getuid() == 0:
        pwnam = pwd.getpwnam(user)
        running_uid, running_gid = (pwnam[2], pwnam[3])

        if running_gid != os.getgid():
            os.setgid(running_gid)

        if running_uid != os.getuid():
            os.setuid(running_uid)