如何从信号号获得易于理解的描述? [英] How can I get a human-readable description from a signal number?

问题描述

POSIX标准或其他C标准是否提供了一种从信号编号中恢复有意义的消息的方法，就像strerror()使得可以从errno恢复消息一样? Gnu C库具有strsignal()，但如果可能的话，我希望可以移植到BSD和其他Unix变体中.

Does the POSIX standard or another C standard provide a way to recover a meaningful message from a signal number, in the same way that strerror() makes it possible to recover a message from errno? The Gnu C library has strsignal(), but if possible, I would like something portable to BSD and other Unix variants.

推荐答案

是的，有趣的是，存在一种从POSIX中的信号中获取字符串消息的标准方法.碰巧的是，它是 strsignal() .从POSIX.1-2008:

Yes, interestingly, there is a standard way to get a string message from a signal in POSIX. It is, quite coincidentally, strsignal(). From POSIX.1-2008:

strsignal()函数应将信号编号中的信号编号映射到实现定义的字符串，并应返回指向它的指针.它应使用与psignal()函数相同的消息集.

The strsignal() function shall map the signal number in signum to an implementation-defined string and shall return a pointer to it. It shall use the same set of messages as the psignal() function.

不为您提供此功能的环境不兼容POSIX.尽管相对较新(问题7于2008年问世)，但我在

An environment that does not provide you this function is not POSIX-compliant. Although relatively new (Issue 7 came out in 2008), I have a man page for strsignal() on Mac OS X, so that's a good sign.

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