Question

I am trying to create a child process and then send SIGINT to the child without terminating the parent. I tried this:

pid=fork();
  if (!pid)
  {
      setpgrp();
      cout<<"waiting...\n";
      while(1);
  }
  else
      {
      cout<<"parent";
      wait(NULL);
      }

but when I hit C-c both process were terminated

Answer 1

You could try implementing a SIGINT signal handler which, if a child process is running, kills the child process (and if not, shuts down the application).

Alternatively, set the parent’s SIGINT handler to SIG_IGN and the child’s to SIG_DFL.