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ualarm.0
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1992-08-10
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67 lines
UALARM(3) UNIX Programmer's Manual UALARM(3)
NNAAMMEE
uuaallaarrmm - schedule signal after specified time
SSYYNNOOPPSSIISS
##iinncclluuddee <<uunniissttdd..hh>>
_u___i_n_t
uuaallaarrmm(_u___i_n_t _m_i_c_r_o_s_e_c_o_n_d_s, _u___i_n_t _i_n_t_e_r_v_a_l)
DDEESSCCRRIIPPTTIIOONN
TThhiiss iiss aa ssiimmpplliiffiieedd iinntteerrffaaccee ttoo sseettiittiimmeerr((22))..
The uuaallaarrmm() function waits a count of _m_i_c_r_o_s_e_c_o_n_d_s before asserting the
terminating signal SIGALRM. System activity or time used in processing
the call may cause a slight delay.
If the _i_n_t_e_r_v_a_l argument is nonzero, the SIGALRM signal will be sent to
the process every _i_n_t_e_r_v_a_l microseconds after the timer expires (e.g. af
ter _v_a_l_u_e microseconds have passed).
RREETTUURRNN VVAALLUUEESS
When the signal has successfully been caught, aallaarrmm() returns the amount
of time left on the clock. The maximum mumber of _m_i_c_r_o_s_e_c_o_n_d_s allowed is
2147483647.
SSEEEE AALLSSOO
getitimer(2), setitimer(2), sigpause(2), sigvec(2), signal(3),
sleep(3), alarm(3), usleep(3)
HHIISSTTOORRYY
The uuaallaarrmm() function appeared in 4.3BSD.
4.3 Berkeley Distribution April 19, 1991 1