python signal - Serbipunk/notes GitHub Wiki

https://docs.python.org/zh-cn/3/library/signal.html

General rules

The signal.signal() function allows defining custom handlers to be executed when a signal is received. A small number of default handlers are installed: SIGPIPE is ignored (so write errors on pipes and sockets can be reported as ordinary Python exceptions) and SIGINT is translated into a KeyboardInterrupt exception if the parent process has not changed it.

A handler for a particular signal, once set, remains installed until it is explicitly reset (Python emulates the BSD style interface regardless of the underlying implementation), with the exception of the handler for SIGCHLD, which follows the underlying implementation.

signal.signal() 函数允许定义在接收到信号时执行的自定义处理程序。少量的默认处理程序已经设置： SIGPIPE 被忽略（因此管道和套接字上的写入错误可以报告为普通的 Python 异常）以及如果父进程没有更改 SIGINT ，则其会被翻译成 KeyboardInterrupt 异常。

一旦设置，特定信号的处理程序将保持安装，直到它被显式重置（ Python 模拟 BSD 样式接口而不管底层实现），但 SIGCHLD 的处理程序除外，它遵循底层实现。