Linux c 开发-11 Singnal用法试验

#include <pthread.h>
#include <stdio.h>
#include <unistd.h>
#include <signal.h>
void sig_handler(int signum);
int main()
{
	signal(SIGINT,sig_handler);
	pause();
	
}
void sig_handler(int signum)
{
    if(0 > signum)
    {
        fprintf(stderr,"sig_handler param err. [%d]
",signum);
        return;
    }
    if(SIGINT == signum)
    {
        printf("Received signal [%s]
",SIGINT==signum?"SIGINT":"Other");
    }
    if(SIGQUIT == signum)
    {
        printf("Received signal [%s]
",SIGQUIT==signum?"SIGQUIT":"Other");
    }

    return;
}

信号处理可以用来模拟操作系统的中断功能，如上代码，当按Ctrl+C 时，就会输出信息