sigaction实例

大家好，又见面了，我是你们的朋友全栈君。

#include <stdio.h>

#include <string.h>

#include <stdlib.h>

#include <unistd.h>

#include <sys/types.h>

#include <errno.h>

#include <time.h>

#include <sys/stat.h>

#include <sys/fcntl.h>

#include <syslog.h>

#include <signal.h>

static void signal_handle(int sign)

{

       printf(“Test:System signal(%d) received,exit \n”,sign);

       exit(0);

}

void signal_oact(int sign)

{

       printf(“Test:in signal_oact”);

}

void signal_set()

{

       struct sigaction act,old_act;

       //act

       act.sa_handler = signal_handle;

       sigemptyset(&act.sa_mask);

       act.sa_flags = 0;

       //oact

       old_act.sa_handler = signal_oact ;

       //

       if(sigaction(SIGHUP,&act,&old_act) <0)

       {

               printf(“FATAL errorfor sigaction in function signal_set \n”);

                exit(-1);

       }

       sigaction(SIGSEGV,&act,NULL);

       sigaction(SIGINT,&act,&old_act);

       sigaction(SIGTERM,&act,NULL);

       sigaction(SIGQUIT,&act,NULL);

       return;

}

int main()

{

       signal_set();

       while(1)

       {

                printf(“test:waitsignal\n”);

                sleep(1);

       }

       return 0;

}

运行后，执行ctrl+c命令，产生一个SIGINT信号，程序会执行 signal_handle函数

SIGINT信号，程序终止(interrupt)信号,在用户键入INTR字符(通常是Ctrl-C)时发出，用于通知前台进程组终止进程。