989d921f5d
I'm very pleased to announce the release of our new website and documentation using the new toolchain with Hugo and AsciiDoctor. To get more information about the new toolchain please read the FreeBSD Documentation Project Primer[1], Hugo docs[2] and AsciiDoctor docs[3]. Acknowledgment: Benedict Reuschling <bcr@> Glen Barber <gjb@> Hiroki Sato <hrs@> Li-Wen Hsu <lwhsu@> Sean Chittenden <seanc@> The FreeBSD Foundation [1] https://docs.FreeBSD.org/en/books/fdp-primer/ [2] https://gohugo.io/documentation/ [3] https://docs.asciidoctor.org/home/ Approved by: doceng, core
204 lines
6 KiB
Groff
204 lines
6 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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.\" This code is derived from software contributed to Berkeley by
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.\" the American National Standards Committee X3, on Information
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.\" Processing Systems.
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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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.\" @(#)setbuf.3 8.1 (Berkeley) 6/4/93
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.\" %FreeBSD: src/lib/libc/stdio/setbuf.3,v 1.17 2007/01/09 00:28:07 imp Exp %
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.\" $FreeBSDru: frdp/doc/ru_RU.KOI8-R/man/man3/setbuf.3,v 1.8 2007/10/30 19:33:07 ru Exp $
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.\" $FreeBSD$
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.\"
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.Dd 4 ÉÀÎÑ 1993
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.Dt SETBUF 3
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.Os
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.Sh îáú÷áîéå
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.Nm setbuf ,
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.Nm setbuffer ,
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.Nm setlinebuf ,
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.Nm setvbuf
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.Nd ÕÐÒÁ×ÌÅÎÉÅ ÂÕÆÅÒÉÚÁÃÉÅÊ ÐÏÔÏËÁ
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.Sh âéâìéïôåëá
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.Lb libc
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.Sh óéîôáëóéó
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.In stdio.h
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.Ft void
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.Fn setbuf "FILE * restrict stream" "char * restrict buf"
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.Ft void
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.Fn setbuffer "FILE *stream" "char *buf" "int size"
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.Ft int
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.Fn setlinebuf "FILE *stream"
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.Ft int
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.Fn setvbuf "FILE * restrict stream" "char * restrict buf" "int mode" "size_t size"
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.Sh ïðéóáîéå
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éÍÅÀÔÓÑ ÔÒÉ ÔÉÐÁ ÂÕÆÅÒÉÚÁÃÉÉ: ÂÅÚ ÂÕÆÅÒÉÚÁÃÉÉ, ÐÏÂÌÏÞÎÁÑ ÂÕÆÅÒÉÚÁÃÉÑ É
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ÐÏÓÔÒÏÞÎÁÑ ÂÕÆÅÒÉÚÁÃÉÑ.
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ðÒÉ ÏÔÓÕÔÓÔ×ÉÉ ÂÕÆÅÒÉÚÁÃÉÉ ×ÙÈÏÄÎÏÇÏ ÐÏÔÏËÁ ÉÎÆÏÒÍÁÃÉÑ × ËÏÎÅÞÎÏÍ ÆÁÊÌÅ ÉÌÉ
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ÎÁ ÔÅÒÍÉÎÁÌÅ ÐÏÑ×ÌÑÅÔÓÑ ÓÒÁÚÕ ÖÅ, ËÁË ÔÏÌØËÏ ÂÕÄÅÔ ×ÙÐÏÌÎÅÎÁ ÏÐÅÒÁÃÉÑ
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ÚÁÐÉÓÉ; ÐÒÉ ÐÏÂÌÏÞÎÏÊ ÂÕÆÅÒÉÚÁÃÉÉ × ÂÕÆÅÒ ÓÏÈÒÁÎÑÅÔÓÑ ÎÅËÏÔÏÒÏÅ ËÏÌÉÞÅÓÔ×Ï
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ÓÉÍ×ÏÌÏ× É ×ÓÅ ÏÎÉ ×ÙÄÁÀÔÓÑ ÚÁ ÒÁÚ ËÁË ÏÄÉÎ ÂÌÏË; ÐÒÉ ÐÏÓÔÒÏÞÎÏÊ ÂÕÆÅÒÉÚÁÃÉÉ
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ÓÉÍ×ÏÌÙ ÓÏÈÒÁÎÑÀÔÓÑ × ÂÕÆÅÒÅ ÄÏ ÔÅÈ ÐÏÒ, ÐÏËÁ × ×ÙÈÏÄÎÏÍ ÐÏÔÏËÅ ÎÅ ×ÓÔÒÅÔÉÔÓÑ
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ÓÉÍ×ÏÌ ÎÏ×ÏÊ ÓÔÒÏËÉ ÉÌÉ ××ÏÄ ÎÅ ÂÕÄÅÔ ÞÉÔÁÔØÓÑ Ó ÌÀÂÏÇÏ ÐÏÔÏËÁ, Ó×ÑÚÁÎÎÏÇÏ
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Ó ÔÅÒÍÉÎÁÌØÎÙÍ ÕÓÔÒÏÊÓÔ×ÏÍ (ËÁË ÐÒÁ×ÉÌÏ,
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.Dv stdin ) .
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äÌÑ ÐÒÉÎÕÄÉÔÅÌØÎÏÇÏ ×Ù×ÏÄÁ ÂÌÏËÁ ÍÏÖÅÔ ÂÙÔØ ÉÓÐÏÌØÚÏ×ÁÎÁ ÆÕÎËÃÉÑ
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.Xr fflush 3 .
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(ïÂÒÁÔÉÔÅÓØ Ë
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.Xr fclose 3 . )
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.Pp
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ëÁË ÐÒÁ×ÉÌÏ, ×ÓÅ ÆÁÊÌÙ ÂÕÆÅÒÉÚÕÀÔÓÑ ÐÏÂÌÏÞÎÏ.
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ëÏÇÄÁ ÎÁÄ ÆÁÊÌÏÍ ×ÐÅÒ×ÙÅ ×ÙÐÏÌÎÑÅÔÓÑ ÏÐÅÒÁÃÉÑ
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.Tn I/O ,
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×ÙÚÙ×ÁÅÔÓÑ ÆÕÎËÃÉÑ
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.Xr malloc 3
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É ×ÙÄÅÌÑÅÔÓÑ ÂÕÆÅÒ ÏÐÔÉÍÁÌØÎÏÇÏ ÒÁÚÍÅÒÁ.
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åÓÌÉ ÐÏÔÏË Ó×ÑÚÁÎ Ó ÔÅÒÍÉÎÁÌÏÍ
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(ËÁË ÜÔÏ ÏÂÙÞÎÏ ÉÍÅÅÔ ÍÅÓÔÏ Ó ÐÏÔÏËÏÍ
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.Dv stdout ) ,
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ÔÏ ÏÎ ÂÕÆÅÒÉÚÕÅÔÓÑ ÐÏÓÔÒÏÞÎÏ.
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óÔÁÎÄÁÒÔÎÙÊ ÐÏÔÏË ÄÉÁÇÎÏÓÔÉËÉ
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.Dv stderr
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×ÓÅÇÄÁ ÎÅ ÂÕÆÅÒÉÚÏ×ÁÎ.
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.Pp
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æÕÎËÃÉÑ
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.Fn setvbuf
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ÍÏÖÅÔ ÉÓÐÏÌØÚÏ×ÁÔØÓÑ ÄÌÑ ÉÚÍÅÎÅÎÉÑ ÈÁÒÁËÔÅÒÁ ÂÕÆÅÒÉÚÁÃÉÉ ÐÏÔÏËÁ.
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áÒÇÕÍÅÎÔ
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.Fa mode
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ÄÏÌÖÅÎ ÂÙÔØ ÏÄÎÉÍ ÉÚ ÓÌÅÄÕÀÝÉÈ ÔÒ£È ÍÁËÒÏÓÏ×:
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.Bl -tag -width _IOFBF -offset indent
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.It Dv _IONBF
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ÂÅÚ ÂÕÆÅÒÉÚÁÃÉÉ
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.It Dv _IOLBF
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ÐÏÓÔÒÏÞÎÁÑ ÂÕÆÅÒÉÚÁÃÉÑ
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.It Dv _IOFBF
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ÐÏÌÎÁÑ ÂÕÆÅÒÉÚÁÃÉÑ
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.El
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.Pp
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áÒÇÕÍÅÎÔ
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.Fa size
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× ÏÂÙÞÎÏÍ ÓÌÕÞÁÅ ÍÏÖÅÔ ÐÒÉÎÉÍÁÔØ ÎÕÌÅ×ÏÅ ÚÎÁÞÅÎÉÅ ÄÌÑ ×ÙÄÅÌÅÎÉÑ ÂÕÆÅÒÁ
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ÏÐÔÉÍÁÌØÎÏÇÏ ÒÁÚÍÅÒÁ.
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åÓÌÉ ÏÎ ÎÅÎÕÌÅ×ÏÊ, ÔÏ, ÉÓËÌÀÞÁÑ ÓÌÕÞÁÊ ÎÅÂÕÆÅÒÉÚÏ×ÁÎÎÙÈ ÆÁÊÌÏ×, ÁÒÇÕÍÅÎÔ
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.Fa buf
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ÄÏÌÖÅÎ ÕËÁÚÙ×ÁÔØ ÎÁ ÂÕÆÅÒ ÒÁÚÍÅÒÏÍ ÐÏ ËÒÁÊÎÅÊ ÍÅÒÅ
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.Fa size
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ÂÁÊÔ;
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ÜÔÏÔ ÂÕÆÅÒ ÂÕÄÅÔ ÉÓÐÏÌØÚÏ×ÁÔØÓÑ ×ÍÅÓÔÏ ÔÅËÕÝÅÇÏ.
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åÓÌÉ
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.Fa buf
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ÎÅ ÒÁ×ÅÎ
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.Dv NULL ,
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ÏÓ×ÏÂÏÄÉÔØ ÜÔÏÔ ÂÕÆÅÒ Ó ÐÏÍÏÝØÀ
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.Xr free 3
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ÐÏÓÌÅ ÚÁËÒÙÔÉÑ ÐÏÔÏËÁ ÄÏÌÖÅÎ ÂÕÄÅÔ ÓÁÍ ×ÙÚÙ×ÁÀÝÉÊ ËÏÄ.
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(åÓÌÉ ÐÁÒÁÍÅÔÒ
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.Fa size
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ÎÅ ÒÁ×ÅÎ ÎÕÌÀ, Á
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.Fa buf
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ÒÁ×ÅÎ
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.Dv NULL ,
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ÔÏ ÂÕÆÅÒ ÕËÁÚÁÎÎÏÇÏ ÒÁÚÍÅÒÁ ÂÕÄÅÔ ×ÙÄÅÌÅÎ ÎÅÍÅÄÌÅÎÎÏ
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É ÐÒÉ ÚÁËÒÙÔÉÉ ÏÎ ÂÕÄÅÔ ÏÓ×ÏÂÏÖÄ£Î.
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üÔÏ Ñ×ÌÑÅÔÓÑ ÒÁÓÛÉÒÅÎÉÅÍ Ë ANSI C;
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× ÐÅÒÅÎÏÓÉÍÏÍ ËÏÄÅ ÎÅÏÂÈÏÄÉÍÏ ÕËÁÚÙ×ÁÔØ ÒÁÚÍÅÒ ÂÕÆÅÒÁ ÒÁ×ÎÙÍ 0, ÅÓÌÉ × ËÁÞÅÓÔ×Å
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ÂÕÆÅÒÁ ÐÅÒÅÄÁ£ÔÓÑ
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.Dv NULL . )
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.Pp
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æÕÎËÃÉÑ
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.Fn setvbuf
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ÍÏÖÅÔ ÂÙÔØ ÉÓÐÏÌØÚÏ×ÁÎÁ × ÌÀÂÏÍ ÍÅÓÔÅ ÐÒÏÇÒÁÍÍÙ,
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ÏÄÎÁËÏ ÏÎÁ ÍÏÖÅÔ ×ÙÚ×ÁÔØ ÓÔÒÁÎÎÙÅ ÐÏÂÏÞÎÙÅ ÜÆÆÅËÔÙ
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(ÔÁËÉÅ, ËÁË ÕÎÉÞÔÏÖÅÎÉÅ ××ÏÄÁ ÉÌÉ ÓÂÒÏÓ ×Ù×ÏÄÁ),
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ÅÓÌÉ ÐÏÔÏË ``ÁËÔÉ×ÅÎ''.
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ðÅÒÅÎÏÓÉÍÙÅ ÐÒÉÌÏÖÅÎÉÑ ÄÏÌÖÎÙ ×ÙÚÙ×ÁÔØ Å£ ÔÏÌØËÏ ÏÄÉÎ ÒÁÚ ÄÌÑ ËÁÖÄÏÇÏ
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ËÏÎËÒÅÔÎÏÇÏ ÐÏÔÏËÁ,
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É ÄÅÌÁÔØ ÜÔÏ ÄÏ ×ÙÐÏÌÎÅÎÉÑ ËÁËÉÈ-ÌÉÂÏ ÏÐÅÒÁÃÉÊ
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.Tn I/O .
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.Pp
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äÒÕÇÉÅ ÔÒÉ ×ÙÚÏ×Á ÐÏ ÓÕÝÅÓÔ×Õ Ñ×ÌÑÀÔÓÑ ÐÒÏÓÔÏ ÁÌÉÁÓÁÍÉ ÄÌÑ ÏÂÒÁÝÅÎÉÊ Ë
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.Fn setvbuf .
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úÁ ÉÓËÌÀÞÅÎÉÅÍ ÏÔÓÕÔÓÔ×ÉÑ ×ÏÚ×ÒÁÝÁÅÍÏÇÏ ÚÎÁÞÅÎÉÑ, ÆÕÎËÃÉÑ
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.Fn setbuf
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× ÔÏÞÎÏÓÔÉ ÓÏÏÔ×ÅÔÓÔ×ÕÅÔ ×ÙÚÏ×Õ
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.Pp
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.Dl "setvbuf(stream, buf, buf ? _IOFBF : _IONBF, BUFSIZ);"
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.Pp
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æÕÎËÃÉÑ
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.Fn setbuffer
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ÄÅÌÁÅÔ ÔÏ ÖÅ ÓÁÍÏÅ, ÒÁÚ×Å ÞÔÏ ÒÁÚÍÅÒ ÂÕÆÅÒÁ ÚÁÄÁ£ÔÓÑ Ñ×ÎÏ,
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Á ÎÅ ÏÐÒÅÄÅÌÑÅÔÓÑ ÐÏ ÕÍÏÌÞÁÎÉÀ ÚÎÁÞÅÎÉÅÍ
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.Dv BUFSIZ .
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æÕÎËÃÉÑ
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.Fn setlinebuf
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× ÔÏÞÎÏÓÔÉ ÓÏÏÔ×ÅÔÓÔ×ÕÅÔ ÔÁËÏÍÕ ×ÙÚÏ×Õ:
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.Pp
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.Dl "setvbuf(stream, (char *)NULL, _IOLBF, 0);"
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.Sh ÷ïú÷òáýáåíùå úîáþåîéñ
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æÕÎËÃÉÑ
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.Fn setvbuf
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×ÏÚ×ÒÁÝÁÅÔ 0 × ÓÌÕÞÁÅ ÕÓÐÅÛÎÏÇÏ ÚÁ×ÅÒÛÅÎÉÑ, É ×ÏÚ×ÒÁÝÁÅÔ
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.Dv EOF ,
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ÅÓÌÉ ÚÁÐÒÏÓ ÎÅ ÍÏÖÅÔ ÂÙÔØ ×ÙÐÏÌÎÅÎ
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(ÚÁÍÅÔØÔÅ, ÞÔÏ × ÜÔÏÍ ÓÌÕÞÁÅ ÐÏÔÏË ÐÒÏÄÏÌÖÁÅÔ ÎÏÒÍÁÌØÎÏ ÆÕÎËÃÉÏÎÉÒÏ×ÁÔØ).
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.Pp
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æÕÎËÃÉÑ
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.Fn setlinebuf
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×ÏÚ×ÒÁÝÁÅÔ ÔÏ ÖÅ, ÞÔÏ É ÓÏÏÔ×ÅÔÓÔ×ÕÀÝÉÊ ×ÙÚÏ×
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.Fn setvbuf .
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.Sh óíïôòé ôáëöå
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.Xr fclose 3 ,
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.Xr fopen 3 ,
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.Xr fread 3 ,
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.Xr malloc 3 ,
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.Xr printf 3 ,
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.Xr puts 3
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.Sh óôáîäáòôù
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æÕÎËÃÉÉ
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.Fn setbuf
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É
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.Fn setvbuf
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ÓÏÏÔ×ÅÔÓÔ×ÕÀÔ
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ÓÔÁÎÄÁÒÔÕ
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.St -isoC .
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.Sh ðòïâìåíù
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æÕÎËÃÉÉ
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.Fn setbuffer
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É
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.Fn setlinebuf
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ÎÅ ÍÏÇÕÔ ÂÙÔØ ÐÅÒÅÎÅÓÅÎÙ ×
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.Bx
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×ÐÌÏÔØ ÄÏ ×ÅÒÓÉÉ
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.Bx 4.2 .
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÷ ÓÉÓÔÅÍÁÈ
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.Bx 4.2
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É
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.Bx 4.3
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ÆÕÎËÃÉÑ
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.Fn setbuf
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×ÓÅÇÄÁ ÉÓÐÏÌØÚÕÅÔ ÐÏÌÕÏÐÔÉÍÁÌØÎÙÊ ÒÁÚÍÅÒ É Å£ ÉÓÐÏÌØÚÏ×ÁÎÉÑ ÎÕÖÎÏ ÉÚÂÅÇÁÔØ.
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