#include<stdio.h>
#include<string.h>
#include<unistd.h>
#include<signal.h>

void handler(int sig,siginfo_t *siginfo,void *context)
{
	printf("handler:sig=%d from PID=%d UID=%d\n",sig,siginfo->si_pid,siginfo->si_uid);
}

int main(int argc,char *argv[])
{
	struct sigaction act;
	memset(&act,0,sizeof(act));
	act.sa_sigaction=&handler;
	act.sa_flags=SA_SIGINFO;
	sigaction(SIGTERM,&act,NULL);
	printf("proc PID=%d looping\n",getpid());
	printf("etnter kill PID to send SIGTERM signal to it\n");
	while(1){
	sleep(10);
	}
}