Manual Page - alarm(2)
Manual Reference Pages - ALARM (2)
NAME
alarm - set an alarm clock for delivery of a signal
CONTENTS
Synopsis Description Notes
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.
NOTES
alarm () and
setitimer () share the same timer; calls to one will interfere with use of the
other.
sleep () may be implemented using
SIGALRM ; mixing calls to
alarm () and
sleep () is a bad idea.
Scheduling delays can, as ever, cause the execution of the process to
be delayed by an arbitrary amount of time.
CONFORMING TO
SVr4, POSIX.1-2001, 4.3BSD
SEE ALSO
gettimeofday (2),
pause (2),
select (2),
setitimer (2),
sigaction (2),
signal (2),
sleep (3)
Linux ALARM (2) 1993-07-21
Generated by OpenAsthra.com from man2/alarm.2 using man macros.
