Design and implement a simple shell program (in C programming language) to set a timer to terminate the program after one minute being idle. That is, if there is no command input within one minute after the prompt, then the program will be interrupted by the timer and the timer-handler will terminate the program. Further the program should take an input command to set a timer interval. The following command will set the timer for 30 seconds: timer=30When the program got the timer interrupt (for example, after 30 seconds of idle time), it prints the message saying: "the program is terminated due to the idle time over 30 seconds."A sample code to set a timer for 30 seconds:// Sample code to set a timer to interrupt after some time (to terminate the run). #include #include #include #include #include static int timer_expired = 0; static void alarm_handler(int sig) { timer_expired=30; } int main() { // Set up a signal hander to call alarm_handler() // when SIGALRM is raised sigaction(SIGALRM, &(struct sigaction){.sa_handler = alarm_handler}, NULL); time_t t; srand((unsigned) time(&t)); timer_expired = 0; alarm(1); // raise SIGALRM in 1 seconds while (!timer_expired) { int s=(rand()%4)+1; printf("%d", s); } return 0;