Question

C

write a simple program that can't be killed by the user typing ctrl-C

Answer 1

/* A C program that does not terminate when Ctrl+C is pressed */
#include <stdio.h>
#include <signal.h>

// handle the signal which is passed to it in this SIGINT signal is passed
//SIGINT signal in corresponds to Ctrl + c so when we press it it pass the control
// here for signal handling and this does only one thing print a message
void sigHandler(int sig_num)
{
   signal(SIGINT, sigHandler); //reset handler to catch the signal next time
   printf("\n Cannot be terminated using Ctrl+C \n");
   fflush(stdout);
}

int main ()
{
   signal(SIGINT, sigHandler); // this assign the signal to pass the control to sighandler when SIGINT is recieved
   while(1)
   {      
   }
   return 0;
}