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lab2/signal/ #10

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utterances-bot opened this issue Apr 18, 2023 · 3 comments

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utterances-bot commented Apr 18, 2023

四：信号处理 - USTC OSH 2023 课程主页

https://osh-2023.github.io/lab2/signal/

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liuly0322 commented Apr 18, 2023 •

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未来可能的文档改进：

调整文档组织：
- 增加 bash 的 CTRL+Z 暂停前台进程 + jobs 展示，先引入前后台进程和进程组的概念；
- 先不要求丢弃命令，而是要求通过设置前台进程组来保证执行命令时 CTRL+C 不退出 shell，以免混淆。
对实验给出更多提示：
- 需要在合适的地方忽略 SIGTTOU 信号及切换前后台进程组；
- 解释清楚嵌套 shell 的含义：当 shell 未处理 SIGINT 信号时，多层 shell 按下 ctrl+c 每次应该只退出最里层。

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liuly0322 commented Apr 19, 2023

~~还有就是 echo 的内容可以改回 taokystrong~~ 去年文档

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liuly0322 commented Apr 19, 2023 •

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希望信号只影响 shell 创建的子进程

可以调整为

希望信号只被发送到当前正在执行命令的子进程

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