Copyright (c) 1983, 1993
The Regents of the University of California. All rights reserved.
%sccs.include.proprietary.roff%
@(#)alarm.3 8.1 (Berkeley) 06/05/93
The Regents of the University of California. All rights reserved.
%sccs.include.proprietary.roff%
@(#)alarm.3 8.1 (Berkeley) 06/05/93
ALARM 3F ""
C 5 NAME
alarm - execute a subroutine after a specified time
SYNOPSIS
integer function alarm (time, proc) integer time
external proc
DESCRIPTION
This routine arranges for subroutine
proc to be called after
time seconds. If
time is ``0'', the alarm is turned off and no routine will be called.
The returned value will be the time remaining on the last alarm.
FILES
"SEE ALSO"
alarm(3C), sleep(3F), signal(3F)
BUGS
Alarm and
sleep interact. If
sleep is called after
alarm , the
alarm process will never be called. SIGALRM will occur at the lesser of the
remaining
alarm time or the
sleep time.