//
// sample program for UNIX signal handling
// 

#include <stdio.h>
#include <signal.h>
 
void sigproc(void);
 
void quitproc(void); 
 
main() {
 signal(SIGINT, sigproc);
 signal(SIGQUIT, quitproc);
 printf("ctrl-c disabled use ctrl-\\ to quit\n");
 for(;;); /* infinite loop */
}
		    
void sigproc() {
 signal(SIGINT, sigproc); /*  */
 /* NOTE some versions of UNIX will reset signal to default
 after each call. So for portability reset signal each time */
					      
 printf("you have pressed ctrl-c\n");
}
						       
void quitproc(){
 printf("ctrl-\\ pressed to quit\n");
 exit(0); /* normal exit status */
}