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<TITLE>alarm</TITLE>
<body bgcolor="#ffffcc">
<hr>
<pre>
<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 <unistd.h>
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>
</pre>
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