.\" Copyright (c) 1980, 1991, 1993 .\" The Regents of the University of California. All rights reserved. .\" .\" This code is derived from software contributed to Berkeley by .\" the American National Standards Committee X3, on Information .\" Processing Systems. .\" .\" 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. .\" .\" @(#) setbuf. 3 8.1 (Berkeley) 6/4/93 .\" %FreeBSD: src/lib/libc/stdio/setbuf. 3, v 1.5. 2.5 2001/12/14 18:33:57 ru Exp % .\" $FreeBSD: doc/ja_JP.eucJP/man/man3/setbuf. 3, v 1.4 2002/05/18 07:12:56 horikawa Exp $ .\" .Dd June 4, 1993 .Dt SETBUF 3 .Os .Sh ¸íĪ .Nm setbuf , .Nm setbuffer , .Nm setlinebuf , .Nm setvbuf .Nd ½ºÆ®¸² ¹öÆÛ¸µ Á¶ÀÛ .Sh ÇÁ·Î±×·¥ ¶óÀ̺귯¸® .Lb libc .Sh ¼­½Ä .In stdio.h .Ft void .Fn setbuf "FILE *stream" "char *buf" .Ft void .Fn setbuffer "FILE *stream" "char *buf" "int size" .Ft int .Fn setlinebuf "FILE *stream" .Ft int .Fn setvbuf "FILE *stream" "char *buf" "int mode" "size_t size" .Sh ÇØ¼³ ÀÌ¿ëÇÒ ¼ö ÀÖ´Â 3 ŸÀÔÀÇ ¹öÆÛ¸µÀº, ¹öÆÛ¸µ ÀÌ·ç¾î, ºí·Ï ¹öÆÛ¸µ, ¹× Çà ¹öÆÛ¸µÀÔ´Ï´Ù. Ãâ·Â ½ºÆ®¸²ÀÌ ¹öÆÛ¸µ ¾øÀ½ÀÇ °æ¿ì, Á¤º¸´Â ±âÀÔÇØÁö¸é(ÀÚ) Áï½Ã ±âÀÔÇØ ¾ÕÆÄÀÏÀ̳ª ´Ü¸»¿¡ Ç¥½ÃµË´Ï´Ù. Ãâ·Â ½ºÆ®¸²ÀÌ ºí·Ï ¹öÆÛ¸µÀÇ °æ¿ì, ´Ù¼öÀÇ Ä³¸¯ÅͰ¡ ÃàÀûµÇ°í ºí·ÏÀ¸·Î¼­ ±âÀÔÇØÁý´Ï´Ù. Ãâ·Â ½ºÆ®¸²ÀÌ Çà ¹öÆÛ¸µÀÇ °æ¿ì, °³ÇàÀÌ Ãâ·ÂµÇ´ÂÁö, ¶Ç´Â ´Ü¸» µð¹ÙÀ̽º¿¡ ¾ÆÅ¿Ä¡ µÈ ÀÓÀÇÀÇ ½ºÆ®¸² (Åë»óÀº stdin)(À¸)·ÎºÎÅÍ ÀÔ·ÂÀÌ ÀÐÈú ¶§±îÁö, ij¸¯Å͸¦ ÀúÃàÇÒ ¼ö ÀÖ½À´Ï´Ù. ÇÔ¼ö .Xr fflush 3 (À»)¸¦ »ç¿ëÇØ, »¡¸® ºí·ÏÀÇ Ãâ·ÂÀ» °­Á¦ÇÒ ¼öµµ ÀÖ½À´Ï´Ù ( .Xr fclose 3 (À»)¸¦ ÂüÁ¶). .Pp Åë»ó, ¸ðµç ÆÄÀÏÀº ºí·Ï ¹öÆÛ¸µ µË´Ï´Ù. ÆÄÀÏ¿¡ ´ëÇØ¼­ ÃÖÃÊÀÇ ÀÔÃâ·Â Á¶ÀÛÀÌ ¹ß»ýÇßÀ» ¶§, .Xr malloc 3 ÇÏÁö¸¸ ºÒ·Á °¡ ÃÖÀûÀÎ »çÀÌÁîÀÇ ¹öÆÛ°¡ ȹµæµË´Ï´Ù. ( .Em stdout ÇÏÁö¸¸ Åë»ó ½Ç½ÃÇϵµ·Ï(µíÀÌ)) ½ºÆ®¸²ÀÌ ´Ü¸»À» ÂüÁ¶ÇÏ´Â °æ¿ì´Â Çà ¹öÆÛ¸µÀÔ´Ï´Ù. Ç¥ÁØ ¿¡·¯ ½ºÆ®¸² .Em stderr (Àº)´Â Ç×»ó ¹öÆÛ¸µ ¾øÀ½ÀÔ´Ï´Ù. .Pp .Fn setvbuf ÇÔ¼ö´Â, ½ºÆ®¸²ÀÇ ¹öÆÛ¸µ µ¿ÀÛÀ» º¯°æÇϴµ¥ »ç¿ëÇÒ ¼ö ÀÖ½À´Ï´Ù. .Fa mode ÆÄ¶ó¹ÌÅÍ´Â ´ÙÀ½ÀÇ 3 °³ÀÇ ¸ÅÅ©·ÎÀÇ ¾î¶² °ÍÀΰ¡ ³ª¿ÀÁö ¾ÊÀ¸¸é ¾ÈµË´Ï´Ù. .Bl -tag -width _IOFBF -offset indent .It Dv _IONBF ¹öÆÛ¸µ ¾øÀ½ .It Dv _IOLBF Çà ¹öÆÛ¸µ .It Dv _IOFBF ¿ÏÀü ¹öÆÛ¸µ .El .Pp .Fa size ÆÄ¶ó¹ÌÅÍ´Â, ÃÖÀû »çÀÌÁîÀÇ ¹öÆÛ¸¦ ¾ðÁ¦³ª ´ë·Î¿¡ Áö¿¬ ÇÒ´ç ½Ã۱â À§Çؼ­(¶§¹®¿¡) 0 À¸·Î ¼³Á¤ÇÒ ¼ö ÀÖ½À´Ï´Ù. ÀÌ ÆÄ¶ó¹ÌÅͰ¡ 0 ÀÌ ¾Æ´Ñ °æ¿ì, ¹öÆÛ¸µ ¾øÀ½ÀÇ ÆÄÀÏÀ» Á¦¿ÜÇϸé, .Fa buf Àμö´Â Àû¾îµµ ±æÀ̰¡ .Fa size ¹ÙÀÌÆ®ÀÇ ¹öÆÛ¸¦ °¡¸®Å°Áö ¾ÊÀ¸¸é ¾ÈµË´Ï´Ù. ÀÌ ¹öÆÛ°¡ ÇöÀçÀÇ ¹öÆÛ ´ë½Å¿¡ »ç¿ëµË´Ï´Ù ( .Fa size Àμö°¡ 0 ÀÌ ¾Æ´Ï±â´Â ÇÏÁö¸¸, .Fa buf ÇÏÁö¸¸ .Dv NULL ÀÇ °æ¿ì, ÁöÁ¤ »çÀÌÁîÀÇ ¹öÆÛ°¡ Áï½Ã ÇÒ´çÇØÁ® Ŭ·Î¿ìÁî½Ã¿¡ ÇØ¹æµË´Ï´Ù. À̰ÍÀº ANSI C ÀÇ È®ÀåÀÔ´Ï´Ù. ÀÌ½Ä °¡´É ÄÚµå´Â »çÀÌÁî°¡ 0 ÀÇ .Dv NULL ¹öÆÛ¸¦ »ç¿ëÇÒ °ÍÀÔ´Ï´Ù). .Pp .Fn setvbuf ÇÔ¼ö´Â ¾ðÁ¦¶óµµ »ç¿ëÇÒ ¼ö ÀÖ½À´Ï´Ù¸¸, ½ºÆ®¸²ÀÌ ``¾×Ƽºê''°æ¿ì¿¡, (¿¹¸¦ µé¾î, ÀÔ·ÂÀÇ Àß¶ó¼­ ¹ö¸²À̳ª Ãâ·ÂÀÇ Ç÷¡½ÃµîÀÇ) ±â¹¦ÇÑ ºÎÀÛ¿ëÀ» °¡Áö´Â ÀÏÀÌ ÀÖ½À´Ï´Ù. ÀÌ½Ä °¡´ÉÇÑ ¾îÇø®ÄÉÀ̼ÇÀº, ÇϵîÀÇ .Tn ÀÔÃâ·Â ÇÏÁö¸¸ ½ÇÇàµÇ±â Àü¿¡, ÁöÁ¤µÈ ÀÓÀÇÀÇ ½ºÆ®¸²¿¡ ´ëÇØ¼­ ÀÌ ÇÔ¼ö¸¦ ÇÑ ¹ø¸¸ È£ÃâÇØ¾ß ÇÕ´Ï´Ù. .Pp ´Ù¸¥ 3 °³ÀÇ È£ÃâÀº, ½ÇÁ¦·Î´Â, .Fn setvbuf È£ÃâÀÇ º°¸í¿¡ Áö³ªÁö ¾Ê½À´Ï´Ù. ¹Ýȯ°ªÀÌ ¾ø´Â °ÍÀ» Á¦¿ÜÇØ, .Fn setbuf ÇÔ¼ö´Â ÀÌÇÏÀÇ È£Ãâ°ú ¾ö¹ÐÇÏ°Ô °°½À´Ï´Ù. .Pp .Dl "setvbuf(stream, buf, buf ? _IOFBF : _IONBF, BUFSIZ);" .Pp .Fn setbuffer ÇÔ¼ö´Â, ¹öÆÛÀÇ »çÀÌÁ È£ÃâÇØ ¿øÀÌ °áÁ¤ÇØ µðÆúÆ®ÀÇ .Dv BUFSIZ ±×¸®°í °áÁ¤µÇ´Â °ÍÀº ¾Æ´Ñ °Í Àܴ̿ °°½À´Ï´Ù. .Fn setlinebuf ÇÔ¼ö´Â, ´ÙÀ½ÀÇ È£Ãâ°ú ¾ö¹ÐÇÏ°Ô °°½À´Ï´Ù. .Pp .Dl "setvbuf(stream, (char *) NULL, _IOLBF, 0);" .Sh ¹Ýȯ°ª .Fn setvbuf ÇÔ¼ö´Â Á¤»ó Á¾·áÇϸé(ÀÚ) 0 À» µ¹·ÁÁÝ´Ï´Ù. ¿ä±¸°¡ ¹Þ¾Æµé¿©ÁöÁö ¾Ê´Â °æ¿ì´Â .Dv EOF (À»)¸¦ µ¹·ÁÁÝ´Ï´Ù (½ºÆ®¸²Àº ÀÌ °æ¿ì¿¡¼­µµ ¿©ÀüÈ÷ ±â´ÉÇϰí ÀÖ´Â °Í¿¡ ÁÖÀÇÇØ ÁÖ¼¼¿ä). .Pp .Fn setlinebuf ÇÔ¼ö´Â, µ¿µîÀÇ .Fn setvbuf È£ÃâÀÌ µ¹·ÁÁÖ¾úÀ½ÀÌ ºÐ¸íÇÑ °ªÀ» µ¹·ÁÁÝ´Ï´Ù. .Sh °ü·Ã Ç׸ñ .Xr fclose 3 , .Xr fopen 3 , .Xr fread 3 , .Xr malloc 3 , .Xr printf 3 , .Xr puts 3 .Sh Ç¥ÁØ .Fn setbuf ÇÔ¼ö¿Í .Fn setvbuf ÇÔ¼ö´Â .St -isoC ¿¡ ÀûÇÕÇϰí ÀÖ½À´Ï´Ù. .Sh ¹ö±× .Fn setbuffer ÇÔ¼ö¿Í .Fn setlinebuf ÇÔ¼ö´Â, .Bx 4.2 º¸´Ù ÀüÀÇ ¹öÁ¯ÀÇ .Bx ¿¡ ÀÌ½Ä °¡´ÉÇÏÁö´Â ¾Ê½À´Ï´Ù. .Bx 4.2 ½Ã½ºÅÛ°ú .Bx 4.3 ½Ã½ºÅÛ¿¡¼­´Â, .Fn setbuf (Àº)´Â, ÃÖÀûÀÌÁö ¾Ê´Â ¹öÆÛ »çÀÌÁ Ç×»ó »ç¿ëÇϹǷÎ, ÇÇÇØ ÁÖ¼¼¿ä.