Language Ccpp Cref Man Alarm.htm

 <TITLE>alarm</TITLE>
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<h3>ALARM(2)            Linux Programmer's Manual            ALARM(2)
</h3>

<h3>NAME
</h3>       alarm - set an alarm clock for delivery of a signal

<h3>SYNOPSIS
</h3>       #include &lt;unistd.h&gt;

       long alarm(long seconds);

<h3>DESCRIPTION
</h3>       alarm arranges for a SIGALRM signal to be delivered to the
       process in seconds seconds.

       If seconds is zero, no new alarm is scheduled.

       In any event any previously set alarm is cancelled.

<h3>RETURN VALUE
</h3>       alarm returns the number of seconds  remaining  until  any
       previously  scheduled  alarm  was  due to be delivered, or
       zero if there was no previously scheduled alarm.

<h3>NOTES
</h3>       alarm and setitimer share the same  timer;  calls  to  one
       will interfere with use of the other.

       Scheduling delays can, as ever, cause the execution of the
       process to be delayed by an arbitrary amount of time.

<h3>CONFORMING TO
</h3>       SVID, AT&T, POSIX, X/OPEN, BSD 4.3

</pre>
<hr>
<h3>SEE ALSO
</h3><p>
<a href=setitimer.htm>setitimer</a>, 
<a href=signal.htm>signal</a>, 
<a href=sigaction.htm>sigaction</a>, 
<a href=gettimeofday.htm>gettimeofday</a>, 
<a href=select.htm>select</a>, 
<a href=pause.htm>pause</a>, 
<a href=sleep.htm>sleep</a>, 
<pre>























<h3>Linux                      21 July 1993                         1
</h3>


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