什么是信号功能(SIGINT)? [英] What is the Signal function (SIGINT)?

问题描述

以下这句话是做什么的?如果有人可以解释此功能，我将不胜感激.

What does this statement below do? If anyone can explain this function I would really appreciate it.

signal(SIGINT, SIG_DFL);

推荐答案

SIGINT是中断信号(ctrl + C).它的默认行为是终止该过程.可以配置SIGINT信号，这意味着可以更改默认行为(通过调用sighandler或将其设置为SIG_IGN) 现在，一旦操作更改，并且您想要再次将其设置为该信号的默认行为，则应编写

SIGINT is the interrupt signal (ctrl+C). Its default behaviour is to terminate the process. SIGINT signal can be dis-positioned, means one can change the default behaviour ( By calling sighandler, or setting it SIG_IGN ) Now once the action is changes and you want to set it again the default behaviour of this signal then you should write

signal(SIGINT，SIG_DFL);

signal(SIGINT, SIG_DFL);

它将再次更改信号的默认行为. (这将终止进程)

It will again change the default behaviour of the signal. ( which is to terminate a process )

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