fc733ebccd
This section is based on catpages contributed by Mainichi Communications, Inc. Translated by: MYCOM team Converted by: Japanese Online Manual Project <man-jp@jp.FreeBSD.ORG> Submitted by: Kazuo Horikawa <k-horik@yk.rim.or.jp>
95 lines
2.9 KiB
Groff
95 lines
2.9 KiB
Groff
.\" Copyright (c) 1980, 1991, 1993, 1994
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.\" The Regents of the University of California. All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. All advertising materials mentioning features or use of this software
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.\" must display the following acknowledgement:
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.\" This product includes software developed by the University of
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.\" California, Berkeley and its contributors.
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.\" 4. Neither the name of the University nor the names of its contributors
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.\" may be used to endorse or promote products derived from this software
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.\" without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" @(#)alarm.3 8.2 (Berkeley) 4/19/94
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.\"
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.Dd April 19, 1994
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.Dt ALARM 3
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.Os BSD 4
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.Sh 名称
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.Nm alarm
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.Nd 信号タイマアラームを設定する
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.Sh 書式
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.Fd #include <unistd.h>
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.Ft unsigned int
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.Fn alarm "unsigned int seconds"
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.Sh 解説
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.Bf -symbolic
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このインタフェースは setitimer(2) によって旧式のものとなっています。
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.Ef
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.Pp
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.Fn alarm
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関数は、指定の
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.Fa seconds
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秒の後、信号
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.Dv SIGALRM
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を呼び出しプロセスに
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配信するタイマを設定します。アラームが既に
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.Fn alarm
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によって
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設定されているものの配信されていない場合は、
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.Fn alarm
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をもう一度呼び出すと、
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前の呼び出しの設定を上書きします。要求
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.Fn alarm "0"
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は、現在のアラームを無効にし、信号
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.Dv SIGALRM
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は配信されません。
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.Pp
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.Xr setitimer 2
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の制約のために、
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.Ar seconds
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の許される最大数は
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100000000 です。
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.Pp
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.Sh 戻り値
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.Fn alarm
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の戻り値は、
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.Fn alarm
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の直前の呼び出しからタイマに残された時間の
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量です。アラームが現時点で設定されていない場合、戻り値は
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0 になります。
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.Sh 関連項目
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.Xr setitimer 2 ,
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.Xr sigaction 2 ,
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.Xr sigpause 2 ,
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.Xr sigvec 2 ,
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.Xr signal 3 ,
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.Xr sleep 3 ,
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.Xr ualarm 3 ,
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.Xr usleep 3
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.Pp
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.Sh 歴史
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.Fn alarm
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関数は
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.At v7
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で現れました。
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.\"X kuma
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