c ++：确定哪个信号引起EINTR？ [英] c++: Determine which signal caused EINTR?

问题描述

我正在运行epoll循环，有时我调用epoll_wait返回-1，并将errno设置为EINTR。有时候，我想要结束epoll循环，就像SIGTERM或SIGINT的情况一样。但我有这个代码用-pg标志编译，所以定期SIGPROF（27）信号被提出，停止我的循环。

I am running an epoll loop and sometimes my call to epoll_wait returns -1 with errno set to EINTR. Sometimes, I want this to end the epoll loop, like in the case of SIGTERM or SIGINT. But I have this code compiled with the -pg flag, so periodic SIGPROF (27) signals are raised that stop my loop.

所以...是否可以打开signum，以便我可以确定何时退出或继续？

So... is it possible to switch on the signum so that I can determine when to exit vs. continue? I would like to avoid anything that employs the use of a global to keep track of the most recent signal fired.

推荐答案

添加信号时，我想避免使用全局变量来跟踪最近发出的信号。处理程序在SIGTERM和SIGINT。在这些处理程序中，你设置一个变量，你检查你的主epoll循环

Add signal handlers on SIGTERM and SIGINT. Inside those handlers you set a variable that you check in your main epoll loop

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