Linux下简单的信号处理

#include<stdio.h>
#include<stdlib.h>
#include<signal.h>

void ouch(int sig)
{
    printf("OUCH!--I get signal %d\n",sig);
}

int main()
{
    signal(SIGINT,ouch);

    while(1)
    {
        printf("Hello World!\n");
        sleep(1);
    }
}

#include<stdio.h>
#include<stdlib.h>
#include<signal.h>

void ouch(int sig)
{
    printf("ouch!-----i have receivd %d",sig);
}


int main()
{
    pid_t pid=fork();
    if(pid==0)
    {
        signal(SIGHUP,ouch);//这里必须先写signal如果写在while后面则已经被终端，所有要现注册
        while(1)
        {
            printf("i am the child\n");
            sleep(1);
        }

    }
    if(pid)
    {
        while(1)
        {
            sleep(5);
            printf("i am parent process");
            kill(pid,SIGHUP);
        }
    }
}