mirror of
https://github.com/GnoConsortium/gno.git
synced 2024-11-15 15:07:16 +00:00
95 lines
2.9 KiB
Groff
95 lines
2.9 KiB
Groff
.\" Copyright (c) 1980, 1991, 1993, 1994
|
|
.\" The Regents of the University of California. All rights reserved.
|
|
.\"
|
|
.\" Redistribution and use in source and binary forms, with or without
|
|
.\" modification, are permitted provided that the following conditions
|
|
.\" are met:
|
|
.\" 1. Redistributions of source code must retain the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer.
|
|
.\" 2. Redistributions in binary form must reproduce the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer in the
|
|
.\" documentation and/or other materials provided with the distribution.
|
|
.\" 3. All advertising materials mentioning features or use of this software
|
|
.\" must display the following acknowledgement:
|
|
.\" This product includes software developed by the University of
|
|
.\" California, Berkeley and its contributors.
|
|
.\" 4. Neither the name of the University nor the names of its contributors
|
|
.\" may be used to endorse or promote products derived from this software
|
|
.\" without specific prior written permission.
|
|
.\"
|
|
.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
.\" SUCH DAMAGE.
|
|
.\"
|
|
.\" @(#)alarm.3 8.2 (Berkeley) 4/19/94
|
|
.\"
|
|
.TH ALARM 2 "16 January 1997" GNO "System Calls"
|
|
.SH NAME
|
|
.BR alarm
|
|
\- set signal timer alarm
|
|
.SH SYNOPSIS
|
|
.br
|
|
#include <unistd.h>
|
|
.sp 1
|
|
long
|
|
\fBalarm\fR (long \fIseconds\fR);
|
|
.br
|
|
long
|
|
\fBalarm10\fR (long \fItenths\fR);
|
|
.SH DESCRIPTION
|
|
.LP
|
|
The
|
|
.BR alarm
|
|
function
|
|
waits a count of
|
|
.BR seconds
|
|
before asserting the terminating signal
|
|
.BR SIGALRM .
|
|
When the signal has successfully been caught,
|
|
.BR alarm
|
|
returns the amount of time left on the clock.
|
|
.LP
|
|
If an alarm has been set with
|
|
.BR alarm ,
|
|
another call to
|
|
.BR alarm
|
|
will supersede the prior call.
|
|
If
|
|
.IR seconds
|
|
is zero, the alarm timer is disabled.
|
|
.LP
|
|
.BR alarm10
|
|
is identical to
|
|
.BR alarm ,
|
|
except that values are measured in tenths of seconds.
|
|
.SH ERRORS
|
|
No errors are possible.
|
|
.SH STANDARDS
|
|
.BR alarm
|
|
is not quite POSIX conformant in that it uses types of
|
|
.BR long
|
|
rather than
|
|
.BR "unsigned int" .
|
|
.BR alarm10
|
|
is a non-standard function.
|
|
.SH SEE ALSO
|
|
.BR setitimer (2),
|
|
.BR sigpause (2),
|
|
.BR sigvec (2),
|
|
.BR signal (2),
|
|
.BR sleep (3),
|
|
.BR ualarm (3),
|
|
.BR usleep (3)
|
|
.SH HISTORY
|
|
An
|
|
.BR alarm
|
|
function appeared in Version 7 AT&T UNIX.
|