4.3BSD-Tahoe/usr/man/cat3f/alarm.0

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ALARM(3F)	    UNIX Programmer's Manual		ALARM(3F)



NNAAMMEE
     alarm - execute a subroutine after a specified time

SSYYNNOOPPSSIISS
     iinntteeggeerr ffuunnccttiioonn aallaarrmm ((ttiimmee,, pprroocc))
     iinntteeggeerr ttiimmee
     eexxtteerrnnaall pprroocc

DDEESSCCRRIIPPTTIIOONN
     This routine arranges for subroutine _p_r_o_c to be called after
     _t_i_m_e seconds. If _t_i_m_e is ``0'', the alarm is turned off and
     no routine will be called.  The returned value will be the
     time remaining on the last alarm.

FFIILLEESS
     /usr/lib/libU77.a

SSEEEE AALLSSOO
     alarm(3C), sleep(3F), signal(3F)

BBUUGGSS
     _A_l_a_r_m and _s_l_e_e_p interact. If _s_l_e_e_p is called after _a_l_a_r_m,
     the _a_l_a_r_m process will never be called. SIGALRM will occur
     at the lesser of the remaining _a_l_a_r_m time or the _s_l_e_e_p time.































Printed 7/9/88		  May 15, 1985				1