| Rev | Line | |
|---|
| [9] | 1 | .\" Copyright (c) 1980 Regents of the University of California.
|
|---|
| 2 | .\" All rights reserved. The Berkeley software License Agreement
|
|---|
| 3 | .\" specifies the terms and conditions for redistribution.
|
|---|
| 4 | .\"
|
|---|
| 5 | .\" @(#)alarm.3c 6.3 (Berkeley) 5/27/86
|
|---|
| 6 | .\"
|
|---|
| 7 | .TH ALARM 2 "May 27, 1986"
|
|---|
| 8 | .UC 4
|
|---|
| 9 | .SH NAME
|
|---|
| 10 | alarm \- schedule signal after specified time
|
|---|
| 11 | .SH SYNOPSIS
|
|---|
| 12 | .nf
|
|---|
| 13 | .ft B
|
|---|
| 14 | #include <unistd.h>
|
|---|
| 15 |
|
|---|
| 16 | unsigned int alarm(unsigned int \fIseconds\fP)
|
|---|
| 17 | .ft R
|
|---|
| 18 | .fi
|
|---|
| 19 | .SH DESCRIPTION
|
|---|
| 20 | .B Alarm
|
|---|
| 21 | causes signal SIGALRM, see
|
|---|
| 22 | .BR sigaction (2),
|
|---|
| 23 | to be sent to the invoking process
|
|---|
| 24 | in a number of seconds given by the argument.
|
|---|
| 25 | Unless caught or ignored, the signal terminates the process.
|
|---|
| 26 | .PP
|
|---|
| 27 | Alarm requests are not stacked; successive calls reset the alarm clock.
|
|---|
| 28 | If the argument is 0, any alarm request is canceled.
|
|---|
| 29 | Because of scheduling delays,
|
|---|
| 30 | resumption of execution of when the signal is
|
|---|
| 31 | caught may be delayed an arbitrary amount.
|
|---|
| 32 | .PP
|
|---|
| 33 | The return value is the amount of time previously remaining in the alarm clock.
|
|---|
| 34 | .SH "SEE ALSO"
|
|---|
| 35 | .BR pause (2),
|
|---|
| 36 | .BR sigsuspend (2),
|
|---|
| 37 | .BR sigaction (2),
|
|---|
| 38 | .BR sleep (3).
|
|---|
Note:
See
TracBrowser
for help on using the repository browser.
