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Document error return.

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christos 1998-11-12 15:36:05 +00:00
parent 0d5518db3b
commit 24e45d4bc3
1 changed files with 4 additions and 1 deletions
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5
lib/libc/gen/alarm.3
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@ -1,4 +1,4 @@
.\" $NetBSD: alarm.3,v 1.13 1998/04/28 04:07:05 fair Exp $
.\" $NetBSD: alarm.3,v 1.14 1998/11/12 15:36:05 christos Exp $
.\"
.\" Copyright (c) 1980, 1991, 1993, 1994
.\" The Regents of the University of California. All rights reserved.
@ -77,6 +77,9 @@ The return value of
is the amount of time left on the timer from a previous call to
.Fn alarm .
If no alarm is currently set, the return value is 0.
If there is an error setting the timer,
.Fn alarm
returns ((unsigned int) -1).
.Sh SEE ALSO
.Xr sigaction 2 ,
.Xr setitimer 2 ,