dms

#include <stdio.h>
#include <signal.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <pthread.h>
void sys_err(const char *str)
{
	perror(str);
 exit(1);
}

void sig_catch(int signo) // 回调函数
{
 if (signo == SIGINT) {
 printf("catch you!! %d\n", signo);
 sleep(10);
}

 else if (signo == SIGQUIT)
 printf("-----------catch you!! %d\n", signo);

 return ;
 }

 int main(int argc, char *argv[])
 {
 struct sigaction act, oldact;

 act.sa_handler = sig_catch; // set callback function name 设置回调函数
 sigemptyset(&(act.sa_mask)); // set mask when sig_catch working. 清空 sa_mask 屏蔽字, 只在sig_catch 工作时有效
 //sigaddset(&act.sa_mask, SIGQUIT);
 act.sa_flags = 0; // usually use. 默认值

 int ret = sigaction(SIGINT, &act, &oldact); //注册信号捕捉函数
 if (ret == -1)
 sys_err("sigaction error");
 ret = sigaction(SIGQUIT, &act, &oldact); //注册信号捕捉函数

 while (1);

 return 0;
}