4.4BSD/usr/share/man/cat3/alarm.0

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ALARM(3)                    BSD Programmer's Manual                   ALARM(3)

NNAAMMEE
     aallaarrmm - set signal timer alarm

SSYYNNOOPPSSIISS
     ##iinncclluuddee <<uunniissttdd..hh>>

     _u___i_n_t
     aallaarrmm(_u___i_n_t _s_e_c_o_n_d_s);

DDEESSCCRRIIPPTTIIOONN
     TThhiiss iinntteerrffaaccee iiss mmaaddee oobbssoolleettee bbyy sseettiittiimmeerr((22))..

     The aallaarrmm() function waits a count of _s_e_c_o_n_d_s before asserting the termi-
     nating signal SIGALRM. When the signal has successfully been caught,
     aallaarrmm() returns the amount of time left on the clock.  The maximum mumber
     of _s_e_c_o_n_d_s allowed is 2147483647.

     If an alarm has been set with aallaarrmm(), another call to aallaarrmm() will su-
     perceed the prior call.  The request aallaarrmm(_0) voids the current alarm.

SSEEEE AALLSSOO
     sigaction(2),  setitimer(2),  sigpause(2),  sigvec(2),  signal(3),
     sleep(3),  ualarm(3),  usleep(3)

HHIISSTTOORRYY
     An aallaarrmm() function appeared in Version 7 AT&T UNIX.

4th Berkeley Distribution        June 4, 1993                                1