ast_comparator/test/student_data/handout/shlab-handout/cases/prev_2_tsh.c
/*
 * sigint_handler - The kernel sends a SIGINT to the shell whenver the
 *    user types ctrl-c at the keyboard.  Catch it and send it along
 *    to the foreground job.
 */
The kernel sends a SIGINT to the shell whenver the
user types ctrl-c at the keyboard.  Catch it and send it along
to the foreground job.
The kernel sends a SIGINT to the shell whenver the user types ctrl - c at the keyboard . Catch it and send it along to the foreground job .
void sigint_handler(int sig)
{
   pid_t pid = fgpid(jobs);
   if(pid<=0)
      return;
   if(kill(-pid,SIGINT)<0)
   {
      unix_error("sigin_handler error");
      return;
   }
   return;
}
void sigint_handler ( int sig ) { pid_t pid = fgpid ( jobs ) ; if ( pid <= 0 ) return ; if ( kill ( - pid , SIGINT ) < 0 ) { unix_error ( " " ) ; return ; } return ; }
sigint_handler - The kernel sends a SIGINT to the shell whenver the
    user types ctrl-c at the keyboard.
sigint_handler - The kernel sends a SIGINT to the shell whenver the user types ctrl - c at the keyboard .
//sending SIGINT signal to the foreground process