Linux / Unix Command: alarm

Command Library

NAME

alarm - set an alarm clock for delivery of a signal  

SYNOPSIS

#include <unistd.h>

unsigned int alarm(unsigned int seconds);

 

DESCRIPTION

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.  

RETURN VALUE

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.  

SEE ALSO

setitimer(2), signal(2), sigaction(2), gettimeofday(2), select(2), pause(2), sleep(3)

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