#include <unistd.h> unsigned int
alarm (unsigned int seconds);
DESCRIPTION
Bf -symbolic
This interface is made obsolete by
setitimer(2).
Ef
The
alarm ();
function sets a timer to deliver the signal
SIGALRM
to the calling process after the specified number of
Fa seconds .
If an alarm has already been set with
alarm ();
but has not been delivered, another call to
alarm ();
will supersede the prior call.
The request
alarm (0);
voids the current
alarm and the signal SIGALRM will not be delivered.
Due to
setitimer(2)
restriction the maximum number of
Fa seconds
allowed is 100000000.
RETURN VALUES
The return value of
alarm ();
is the amount of time left on the timer from a previous call to
alarm (.);
If no alarm is currently set, the return value is 0.
