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1993-12-07
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ALARM(3) UNIX 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 April 19, 1991 1