Linux信号处理函数signal()使用讲解

深碍√TFBOYSˉ_ 2021-12-16 08:19 281阅读 0赞

让我们来了解一下signal()函数的使用方法及特性.

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有了上述知识的铺垫，我们来写一个简单的signal()处理程序.

\#include <signal.h>

\#include <stdio.h>

\#include <stdlib.h>

void print()

printf("%s\\n", "Hello world");

int main()

signal(SIGINT, print);

int i = 1;

while(i <= 5)

sleep(1);

i += 1;

signal(SIGINT, SIG\_DFL);

i = 1;

while(i <= 5)

sleep(1);

return 0;

上述程序先对SIGINT信号改写，大约5s后又恢复系统对SIGINT信号的定义.

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在5s内按下组合键Ctrl + C，会执行print()函数，输出”Hello world”；5s后，再按下该组合键，会中止程序的运行.

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