/*lsp kill()함수 예제 307p*/
/*ssu_kill_A.c*/
/*20162468 박다은*/

#include <stdio.h>
#include <stdlib.h>
#include <signal.h>
#include <sys/time.h> //gettimeofday

int main(int argc, char * argv[])
{
    struct timeval A, B, C; //시간을 비교할 값들
    gettimeofday(&A, NULL);
    //=======================================

    if(argc != 2){
        fprintf(stderr, "usage : %s [Process ID]\n", argv[0]);
        exit(1);
    }
    else
        kill(atoi(argv[1]), SIGKILL); //kill

    //=======================================
    gettimeofday(&B, NULL);

    C.tv_sec = B.tv_sec - A.tv_sec;
    C.tv_usec = B.tv_usec - A.tv_usec;
    if(C.tv_usec < 0){
        C.tv_sec -= 1;
        C.tv_usec += 1000000;
    }
    printf("ROLLCAKE::Running Time : %ld µs\n", C.tv_sec*1000000 + C.tv_usec); //작은 프로그램이므로 마이크로초로 계산
    exit(0);
}