ast_comparator/test/student_data/handout/shlab-handout/cases/reference_11_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(job_list);
    if(pid != 0){
        if(kill(-pid, SIGINT)){
            unix_error("error in handler sigint");
        }
    }
    return;
}
void sigint_handler ( int sig ) { pid_t pid = fgpid ( job_list ) ; if ( pid != 0 ) { if ( kill ( - pid , SIGINT ) ) { unix_error ( " " ) ; } } 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 .