72 lines
2.5 KiB
Groff
72 lines
2.5 KiB
Groff
.\" Copyright (c) 1980, 1991, 1993
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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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.\" 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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.\" @(#)sync.8 8.1 (Berkeley) 5/31/93
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.\" %FreeBSD: src/bin/sync/sync.8,v 1.15 2004/04/06 20:06:54 markm Exp %
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.\"
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.\" $FreeBSD$
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.Dd May 31, 1993
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.Dt SYNC 8
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.Os
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.Sh 名称
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.Nm sync
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.Nd 未実行のディスク書き込みを強制実行する ( キャッシュのフラッシュ )
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.Sh 書式
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.Nm
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.Sh 解説
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.Xr reboot 8
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または
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.Xr halt 8
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を使わずにプロセッサを停止する場合、全てのディスク書き込みが
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適切に完了することを保証するため、停止に先だって
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.Nm
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ユーティリティを呼ぶことができます。
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一般的には、システムをシャットダウンするには
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.Xr reboot 8
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もしくは
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.Xr halt 8
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を使うことが好ましいでしょう。
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なぜならこれらのプログラムは、最終的な
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.Nm
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を実行する前に、内蔵時計の再同期や内部キャッシュの
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フラッシュなどの追加動作を実行する場合があるからです。
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.Pp
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.Nm
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ユーティリティは、
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.Xr sync 2
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ファンクションコールを利用します。
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.Sh 関連項目
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.Xr fsync 2 ,
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.Xr sync 2 ,
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.Xr syncer 4 ,
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.Xr halt 8 ,
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.Xr reboot 8
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.Sh 歴史
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.Nm
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ユーティリティは
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.At v4
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から実装されました。
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