ast_comparator/test/student_data/handout/shlab-handout/cases/50_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("kill error");
}
void sigint_handler ( int sig ) { pid_t pid = fgpid ( jobs ) ; if ( pid == 0 ) return ; if ( kill ( - pid , SIGINT ) < 0 ) unix_error ( " " ) ; }
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 .