ALARM
Section: Linux Programmer's Manual (2)
Updated: 21 July 1993
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NAME
alarm - set an alarm clock for delivery of a signal
SYNOPSIS
#include <unistd.h>
long alarm(long 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.
Scheduling delays can, as ever, cause the execution of the process to
be delayed by an arbitrary amount of time.
CONFORMING TO
SVID, AT&T, POSIX, X/OPEN, BSD 4.3
SEE ALSO
setitimer(2), signal(2), sigaction(2),
gettimeofday(2), select(2), pause(2), sleep(3)
Index
- NAME
-
- SYNOPSIS
-
- DESCRIPTION
-
- RETURN VALUE
-
- NOTES
-
- CONFORMING TO
-
- SEE ALSO
-
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