Linux create a countdown timer thread

Create an independent countdown timer thread, the program ends automatically when the countdown is over.

void *check_timeout(void *arg)
{
	int second_now = 0;
	int count = 0;

	//Get current time and second
	while (1)
	{
		count++;
		sleep(1);
		if(count >= TIMEOUT_CNT)
		{
			printf("Timeout!\r\n");
            // kill specific proccess
			system("ps | grep busybox | grep -v grep | awk '{print $1}' | xargs kill -s 9");
			exit(0);
		}
        
        // if websocket received data, clear count
		if((strlen(idata) >= 1))
		{
			count = 0;
		}
	}
}

	//creat pthread to check time
	pthread_t thread_check_time;				
	pthread_create(&thread_check_time, NULL, &check_timeout, NULL);