1 .\" Copyright (c) 1990, 1991 The Regents of the University of California.
2 .\" All rights reserved.
4 .\" This code is derived from software contributed to Berkeley by
5 .\" Chris Torek and the American National Standards Committee X3,
6 .\" on Information Processing Systems.
8 .\" Redistribution and use in source and binary forms, with or without
9 .\" modification, are permitted provided that the following conditions
11 .\" 1. Redistributions of source code must retain the above copyright
12 .\" notice, this list of conditions and the following disclaimer.
13 .\" 2. Redistributions in binary form must reproduce the above copyright
14 .\" notice, this list of conditions and the following disclaimer in the
15 .\" documentation and/or other materials provided with the distribution.
16 .\" 3. All advertising materials mentioning features or use of this software
17 .\" must display the following acknowledgement:
18 .\" This product includes software developed by the University of
19 .\" California, Berkeley and its contributors.
20 .\" 4. Neither the name of the University nor the names of its contributors
21 .\" may be used to endorse or promote products derived from this software
22 .\" without specific prior written permission.
24 .\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 .\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 .\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 .\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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30 .\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 .\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 .\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 .\" @(#)fflush.3 5.4 (Berkeley) 6/29/91
38 .\" Converted for Linux, Mon Nov 29 15:22:01 1993, faith@cs.unc.edu
40 .\" Modified 2000-07-22 by Nicol疽 Lichtmaier <nick@debian.org>
41 .\" Modified 2001-10-16 by John Levon <moz@compsoc.man.ac.uk>
43 .\" Japanese Version Copyright (c) 1997-2000 YOSHINO Takashi and NAKANO Takeo
44 .\" all rights reserved.
45 .\" Translated 1997-02-13,YOSHINO Takashi <yoshino@civil.jcn.nihon-u.ac.jp>
46 .\" Update & Modified 1999-03-01, NAKANO Takeo <nakano@apm.seikei.ac.jp>
47 .\" Update & Modified 2000-09-21, NAKANO Takeo
48 .\" Updated 2001-11-02, Kentaro Shirakata <argrath@ub32.org>
49 .\" Updated 2010-04-10, Akihiro MOTOKI <amotoki@dd.iij4u.or.jp>, LDP v3.24
51 .\"WORD: global variable 大域変数
52 .\"WORD: buffered バッファリングされた
54 .TH FFLUSH 3 2009-09-06 "GNU" "Linux Programmer's Manual"
56 .\"O fflush \- flush a stream
58 fflush \- ストリームの内容を強制的に出力(フラッシュ)する
63 .BI "int fflush(FILE *" stream );
66 .\"O For output streams,
68 .\"O forces a write of all user-space buffered data for the given output or update
70 .\"O via the stream's underlying write function.
71 .\"O For input streams,
73 .\"O discards any buffered data that has been fetched from the underlying file,
74 .\"O but has not been consumed by the application.
75 .\"O The open status of the stream
79 は、ユーザー空間でバッファリングされているすべてのデータを
80 指定された出力に書き出す (フラッシュする)、
83 の下位にある書き込み関数を用いてこのストリームを更新する。
86 は、対応するファイルから取得されたが、アプリケーションからは
87 読み出されていないバッファデータを全て破棄する。
93 .\"O argument is NULL,
97 .\"O open output streams.
101 は開いている\fIすべての\fR出力ストリームをフラッシュする。
103 .\"O For nonlocking counterparts, see
104 .\"O .BR unlocked_stdio (3).
105 これらの処理をロックせずに行いたいときは、
106 .BR unlocked_stdio (3)
108 .\"O .SH "RETURN VALUES"
110 .\"O Upon successful completion 0 is returned.
115 .\"O is set to indicate the error.
127 .\"O is not an open stream, or is not open for writing.
134 .\"O may also fail and set
136 .\"O for any of the errors specified for
141 に関して規定されているエラーで失敗することもある。
145 .\"O .SH "CONFORMING TO"
147 C89, C99, POSIX.1-2001, POSIX.1-2008.
149 .\"O The standards do not specify the behavior for input streams.
150 .\"O Most other implementations behave the same as Linux.
151 標準では、入力ストリームに対する動作は規定されていない。
152 他のほとんどの実装は Linux と同じ動作をする。
153 .\" Verified on: Solaris 8.
158 .\"O only flushes the user space buffers provided by the C library.
159 .\"O To ensure that the data is physically stored on disk
160 .\"O the kernel buffers must be flushed too, for example, with
165 は、 C ライブラリが与えているユーザー空間のバッファしかフラッシュしない。
166 データが物理的にディスクに保存されることを保証したければ、
167 カーネルバッファもフラッシュしなければならない。
181 .BR unlocked_stdio (3)