1 .\" Hey Emacs! This file is -*- nroff -*- source.
3 .\" Copyright (c) 1993 Michael Haardt
4 .\" (michael@moria.de),
5 .\" Fri Apr 2 11:32:09 MET DST 1993
7 .\" This is free documentation; you can redistribute it and/or
8 .\" modify it under the terms of the GNU General Public License as
9 .\" published by the Free Software Foundation; either version 2 of
10 .\" the License, or (at your option) any later version.
12 .\" The GNU General Public License's references to "object code"
13 .\" and "executables" are to be interpreted as the output of any
14 .\" document formatting or typesetting system, including
15 .\" intermediate and printed output.
17 .\" This manual is distributed in the hope that it will be useful,
18 .\" but WITHOUT ANY WARRANTY; without even the implied warranty of
19 .\" MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 .\" GNU General Public License for more details.
22 .\" You should have received a copy of the GNU General Public
23 .\" License along with this manual; if not, write to the Free
24 .\" Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111,
27 .\" Modified Wed Jul 21 19:52:58 1993 by Rik Faith <faith@cs.unc.edu>
28 .\" Modified Sun Aug 21 17:40:38 1994 by Rik Faith <faith@cs.unc.edu>
30 .\" Japanese Version Copyright (c) 1996 TABATA Tomohira
31 .\" all rights reserved.
32 .\" Translated Wed Jun 26 19:12:54 JST 1996
33 .\" by TABATA Tomohira <loba@k2.t.u-tokyo.ac.jp>
34 .\" Modified Sat Dec 13 23:43:56 JST 1997
35 .\" by HANATAKA Shinya <hanataka@abyss.rim.or.jp>
36 .\" Updated & Modified Wed May 19 01:55:29 JST 2004
37 .\" by Yuichi SATO <ysato444@yahoo.co.jp>, LDP v1.66
38 .\" Updated & Modified Tue Jan 2 09:09:47 JST 2007 by Yuichi SATO, LDP v2.43
39 .\" Updated 2008-08-04, Akihiro MOTOKI <amotoki@dd.iij4u.or.jp>, LDP v3.05
41 .TH BRK 2 2010-09-20 "Linux" "Linux Programmer's Manual"
43 brk, sbrk \- ¥Ç¡¼¥¿¡¦¥»¥°¥á¥ó¥È¤Î¥µ¥¤¥º¤ÎÊѹ¹¤¹¤ë
45 .B #include <unistd.h>
47 .BI "int brk(void *" addr );
49 .BI "void *sbrk(intptr_t " increment );
52 glibc ¸þ¤±¤Îµ¡Ç½¸¡ºº¥Þ¥¯¥í¤ÎÍ×·ï
53 .RB ( feature_test_macros (7)
65 _BSD_SOURCE || _SVID_SOURCE ||
66 (_XOPEN_SOURCE\ >=\ 500 ||
67 _XOPEN_SOURCE\ &&\ _XOPEN_SOURCE_EXTENDED) &&
68 !(_POSIX_C_SOURCE\ >=\ 200112L || _XOPEN_SOURCE\ >=\ 600)
72 _BSD_SOURCE || _SVID_SOURCE || _XOPEN_SOURCE\ >=\ 500 ||
73 _XOPEN_SOURCE\ &&\ _XOPEN_SOURCE_EXTENDED
82 .I "¥×¥í¥°¥é¥à¡¦¥Ö¥ì¡¼¥¯ (program break)"
84 ¥×¥í¥°¥é¥à¡¦¥Ö¥ì¡¼¥¯¤Ï¥×¥í¥»¥¹¤Î¥Ç¡¼¥¿¡¦¥»¥°¥á¥ó¥È (data segment) ¤Î
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86 ¥Ç¡¼¥¿¡¦¥»¥°¥á¥ó¥È¤ÎËöÈø¤Îľ¸å¤Î¾ì½ê¤È¤Ê¤ë)¡£
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88 ¥á¥â¥ê¤ò³ä¤êÅö¤Æ¤ë¸ú²Ì¤¬¤¢¤ê¡¢
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93 ¤Ï¡¢¥Ç¡¼¥¿¡¦¥»¥°¥á¥ó¥È¤ÎËöÈø¤ò
95 ¤Ç»ØÄꤷ¤¿ÃͤËÀßÄꤹ¤ë¡£
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103 ¤Ï¡¢¥×¥í¥°¥é¥à¤Î¥Ç¡¼¥¿¶õ´Ö¤ò
109 ¤ò¸Æ¤Ó½Ð¤¹¤³¤È¤Ç¡¢¥×¥í¥°¥é¥à¤Î¸½ºß¤Î¥Ö¥ì¡¼¥¯ (break) ¾ì½ê¤òÃΤ뤳¤È¤¬¤Ç¤¤ë¡£
114 ¥¨¥é¡¼¤Î¾ì¹ç¤Ë¤Ï¡¢\-1 ¤òÊÖ¤·¡¢
119 (¤¿¤À¤·¡ÖLINUX ¤Ç¤ÎÃí°Õ¡×¤ò»²¾È¤¹¤ë¤³¤È)¡£
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125 ¿·¤·¤¯³ä¤êÅö¤Æ¤é¤ì¤¿¥á¥â¥ê¤ÎÀèƬ¤ò»Ø¤¹¥Ý¥¤¥ó¥¿¤È¤Ê¤ë)¡£
135 SUSv2 ¤Ç¤Ï¡Ö²áµî¤Î̾»Ä (LEGACY)¡×¤È°ÌÃÖÉÕ¤±¤é¤ì¤Æ¤ª¤ê¡¢
136 POSIX.1-2001 ¤Çºï½ü¤µ¤ì¤¿¡£
140 .\" ¤Ï C µ¬³Ê (C Standard) ¤Ë¤ÏÄêµÁ¤µ¤ì¤Æ¤¤¤Ê¤¤¡£
141 .\" ¤Þ¤¿ POSIX.1 µ¬³Ê¤«¤é¤Ï°Õ¿ÞŪ¤Ë½ü³°¤µ¤ì¤Æ¤¤¤ë (ÃÊÍî B.1.1.1.3, B.8.3.3 »²¾È)¡£
146 ¤ò»ÈÍѤ¹¤ë¤Î¤ÏÈò¤±¤ë¤³¤È¡£
148 ¥á¥â¥ê³ä¤êÅö¤Æ¥Ñ¥Ã¥±¡¼¥¸¤ÎÊý¤¬¡¢°Ü¿¢À¤¬¹â¤¯¡¢
149 »È¤¤¤ä¤¹¤¤¥á¥â¥ê³ä¤êÅö¤ÆÊýË¡¤òÄ󶡤·¤Æ¤¤¤ë¡£
151 ¤¤¤í¤¤¤í¤Ê¥·¥¹¥Æ¥à¤Ë¤ª¤¤¤Æ¡¢
153 ¤Î°ú¤¿ô¤ËÍÍ¡¹¤Ê·¿¤¬»È¤ï¤ì¤Æ¤¤¤ë¡£
154 °ìÈÌŪ¤Ê¤Î¤Ï \fIint\fP, \fIssize_t\fP, \fIptrdiff_t\fP, \fIintptr_t\fP ¤Ç¤¢¤ë¡£
155 .\" \fIint\fP (¤¿¤È¤¨¤Ð XPGv4, DU 4.0, HP-UX 11, FreeBSD 4.0, OpenBSD 3.2),
156 .\" \fIssize_t\fP (OSF1 2.0, Irix 5.3, 6.5),
157 .\" \fIptrdiff_t\fP (libc4, libc5, ulibc, glibc 2.0, 2.1),
158 .\" \fIintptr_t\fP (¤¿¤È¤¨¤Ð XPGv5, AIX, SunOS 5.8, 5.9, FreeBSD 4.7,
159 .\" NetBSD 1.6, Tru64 5.1, glibc2.2).
160 .\" ¤È¤¤¤¦¤Î¤¬Ê¬¤«¤ë¤À¤í¤¦¡£
164 ¤ÎÊÖ¤êÃͤˤĤ¤¤Æ¤ÎÆ°ºî¤Ï¡¢
167 ¥·¥¹¥Æ¥à¥³¡¼¥ë¤ò¥é¥Ã¥×¤¹¤ë glibc ¤Î´Ø¿ô¤Ë¤è¤ë¤â¤Î¤Ç¤¢¤ë¡£
168 (¤½¤Î¾¤Î¿¤¯¤Î¼ÂÁõ¤Ç¤â¡¢
170 ¤ÎÊÖ¤êÃͤϤ³¤ì¤ÈƱ¤¸¤Ç¤¢¤ë¡£
171 ¤³¤ÎÊÖ¤êÃÍ¤Ï SUSv2 ¤Ç¤âµ¬Äꤵ¤ì¤Æ¤¤¤ë¡£)
172 ¤·¤«¤·¡¢¼ÂºÝ¤Î Linux ¥·¥¹¥Æ¥à¥³¡¼¥ë¤Ï¡¢À®¸ù¤·¤¿¾ì¹ç¡¢
173 ¥×¥í¥°¥é¥à¤Î¿·¤·¤¤¥Ö¥ì¡¼¥¯¤òÊÖ¤¹¡£
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175 glibc ¥é¥Ã¥Ñ¡¼´Ø¿ô¤ÏƱÍͤÎƯ¤¤ò¤·
176 (¤¹¤Ê¤ï¤Á¡¢¿·¤·¤¤¥Ö¥ì¡¼¥¯¤¬
178 ¤è¤ê¾®¤µ¤¤¤«¤É¤¦¤«¤ò¥Á¥§¥Ã¥¯¤·)¡¢
179 ¾å¤ÇÀâÌÀ¤·¤¿ 0 ¤È \-1 ¤È¤¤¤¦ÊÖ¤êÃͤòÊÖ¤¹¡£
185 ¥·¥¹¥Æ¥à¥³¡¼¥ë¤ò»È¤¦¥é¥¤¥Ö¥é¥ê´Ø¿ô¤È¤·¤Æ¼ÂÁõ¤µ¤ì¤Æ¤ª¤ê¡¢
186 °ÊÁ°¤Î¥Ö¥ì¡¼¥¯¤ÎÃͤòÊÖ¤¹¤³¤È¤¬¤Ç¤¤ë¤è¤¦¤ËÆâÉô¤ÇÄ´À°¤¬¹Ô¤ï¤ì¤Æ¤¤¤ë¡£