trap '' 24
while true
	do
	echo "hi there"
	sleep 1
	done


#/usr/include/sys/signal.h
##define	SIGHUP	1	/* hangup */
##define	SIGINT	2	/* interrupt (rubout) */
##define	SIGQUIT	3	/* quit (ASCII FS) */
##define	SIGILL	4	/* illegal instruction (not reset when caught) */
##define	SIGTRAP	5	/* trace trap (not reset when caught) */
##define	SIGIOT	6	/* IOT instruction */
##define	SIGABRT 6	/* used by abort, replace SIGIOT in the future */
##define	SIGEMT	7	/* EMT instruction */
##define	SIGFPE	8	/* floating point exception */
##define	SIGKILL	9	/* kill (cannot be caught or ignored) */
##define	SIGBUS	10	/* bus error */
##define	SIGSEGV	11	/* segmentation violation */
##define	SIGSYS	12	/* bad argument to system call */
##define	SIGPIPE	13	/* write on a pipe with no one to read it */
##define	SIGALRM	14	/* alarm clock */
##define	SIGTERM	15	/* software termination signal from kill */
##define	SIGUSR1	16	/* user defined signal 1 */
##define	SIGUSR2	17	/* user defined signal 2 */
##define	SIGCLD	18	/* child status change */
##define	SIGCHLD	18	/* child status change alias (POSIX) */
##define	SIGPWR	19	/* power-fail restart */
##define	SIGWINCH 20	/* window size change */
##define	SIGURG	21	/* urgent socket condition */
##define	SIGPOLL 22	/* pollable event occured */
##define	SIGIO	SIGPOLL	/* socket I/O possible (SIGPOLL alias) */
##define	SIGSTOP 23	/* stop (cannot be caught or ignored) */
##define	SIGTSTP 24	/* user stop requested from tty */
##define	SIGCONT 25	/* stopped process has been continued */
##define	SIGTTIN 26	/* background tty read attempted */
##define	SIGTTOU 27	/* background tty write attempted */
##define	SIGVTALRM 28	/* virtual timer expired */
##define	SIGPROF 29	/* profiling timer expired */
##define	SIGXCPU 30	/* exceeded cpu limit */
##define	SIGXFSZ 31	/* exceeded file size limit */
##define	SIGWAITING 32	/* process's lwps are blocked */
##define	SIGLWP	33	/* special signal used by thread library */
##define	SIGFREEZE 34	/* special signal used by CPR */
##define	SIGTHAW 35	/* special signal used by CPR */
##define	SIGCANCEL 36	/* thread cancellation signal used by libthread */
##define	SIGLOST	37	/* resource lost (eg, record-lock lost) */