QtWidgets is the "older" way of writing Qt applications.
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// Bind netlink socket to events we're interested in。关于这个话题，WPS官方版本下载提供了深入分析
Source: Computational Materials Science, Volume 266，这一点在51吃瓜中也有详细论述
For implementers, there's no Transformer protocol with start(), transform(), flush() methods and controller coordination passed into a TransformStream class that has its own hidden state machine and buffering mechanisms. Transforms are just functions or simple objects — far simpler to implement and test.
Network egress control — compute isolation means nothing if the sandbox can freely phone home. Options range from disabling networking entirely, to running an allowlist proxy (like Squid) that blocks DNS resolution inside the sandbox and forces all traffic through a domain-level allowlist, to dropping CAP_NET_RAW so the sandbox cannot bypass DNS with raw sockets.，详情可参考搜狗输入法下载