misc.py 文件源码

def writefile(path, data, owner=None, group=None, mode=None):
    if isinstance(data, bytes):
        openmode = 'wb'
    else:
        openmode = 'w'

    if owner is not None:
        uid = pwd.getpwnam(owner).pw_uid
    else:
        uid = -1

    if group is not None:
        gid = grp.getgrnam(group).gr_gid
    else:
        gid = -1

    with open(path, openmode) as f:
        os.fchown(
            f.fileno(),
            uid,
            gid
        )
        if mode is not None:
            os.fchmod(f.fileno(), mode)
        return f.write(data)