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

void terminatehandler(int signumber);

int main(void)
{
    	char  buffer1[100], buffer2[100];
    	int i;
    	struct sigaction  act;
    
    	act.sa_handler=terminatehandler;
    	sigemptyset(&act.sa_mask);
    	act.sa_flags=0;
    	if(sigaction(SIGTERM,&act,NULL)==-1)
    	{
        	printf("Couldn’t register signal handler! \n");
    	}

    	printf("Pid of This Process:%6d.", getpid());

    	for( ; ; )
    	{
        	fgets(buffer1, sizeof(buffer1), stdin);
        	for(i=0; i<100; i++)
        	{
             		if(buffer1[ i ]>=97&&buffer1[ i ]<=122)
                 		buffer2[ i ]=buffer1[ i ]-32;
             		else
                 		buffer2[ i ]=buffer1[ i ];
        		printf("Your input is: %s\n\n", buffer2);
     		}
	}
     	return 0;
}


void terminatehandler(int signumber)
{
    	printf("signal SIGTERM.\n");
    	return;
}