#include <stdio.h>
 #include <wiringPi.h>
 #define KEYPAD_PB 9 
 int eventCounter = 0;

  void myInterrupt(void){ eventCounter++; }

  int main(void)

{ if(wiringPiSetupGpio() < 0){ return 1; }

 if(wiringPiISR(KEYPAD_PB, INT_EDGE_FALLING, &myInterrupt) < 0){ return 1; }

  while(1)
{ printf("%d\n", eventCounter); 
eventCounter = 0; delay(1000); }
 return 0; }

1초씩딜레이를 주어서 keypad를 눌렀을때 인터럽트가 발생 해서 eventCounter가  1씩 증가하는 프로그램입니다
 if(wiringPiISR(KEYPAD_PB, INT_EDGE_FALLING, &myInterrupt) < 0){ return 1; } 이코드는 발생해서 프로그램이 꺼지게 되는건가요?