163 lines
4.5 KiB
Groff
163 lines
4.5 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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.\" 3. All advertising materials mentioning features or use of this software
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.\" must display the following acknowledgement:
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.\" This product includes software developed by the University of
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.\" California, Berkeley and its contributors.
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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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.\" @(#)brk.2 8.4 (Berkeley) 5/1/95
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.\" %FreeBSD: src/lib/libc/sys/brk.2,v 1.24 2002/12/18 09:22:30 ru Exp %
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.\"
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.\" $FreeBSD$
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.Dd July 12, 1999
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.Dt BRK 2
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.Os
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.Sh ̾¾Î
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.Nm brk ,
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.Nm sbrk
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.Nd ¥Ç¡¼¥¿¥»¥°¥á¥ó¥È¤Î¥µ¥¤¥º¤òÊѹ¹¤¹¤ë
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.Sh ¥é¥¤¥Ö¥é¥ê
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.Lb libc
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.Sh ½ñ¼°
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.In sys/types.h
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.In unistd.h
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.Ft int
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.Fn brk "const void *addr"
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.Ft void *
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.Fn sbrk "intptr_t incr"
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.Sh ²òÀâ
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.Bf -symbolic
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.Fn brk
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´Ø¿ô¤È
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.Ef
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.Pp
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.Fa addr
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.Sh Ãí
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¥«¡¼¥Í¥ë¤¬´ÉÍý¤¹¤ë¼ÂºÝ¤Î¥×¥í¥»¥¹¥Ç¡¼¥¿¥»¥°¥á¥ó¥È¥µ¥¤¥º¤Ï
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(¤¹¤Ê¤ï¤Á¡¢¥Ç¡¼¥¿¥»¥°¥á¥ó¥È¤ÎºÇ½ª¥Ú¡¼¥¸Ãæ¤ÎǤ°Õ¤Î¥¢¥É¥ì¥¹¤ò»Ø¤·¤Æ¹½¤¤¤Þ¤»¤ó)¡£
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.Pp
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¥×¥í¥°¥é¥à¤Î¥Ö¥ì¡¼¥¯¤Î¸½ºßÃͤϡ¢
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.Fn sbrk 0
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¤ò¸Æ¤Ó½Ð¤¹¤³¤È¤ÇȽÄê²Äǽ¤Ç¤¹¡£
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.Xr end 3
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¤â»²¾È¤·¤Æ¤¯¤À¤µ¤¤¡£
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.Pp
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.Xr getrlimit 2
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¥·¥¹¥Æ¥à¥³¡¼¥ë¤Ï¡¢
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¥Ç¡¼¥¿
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¥»¥°¥á¥ó¥È¤ÎµöÍƤǤ¤ëºÇÂç¤Î¥µ¥¤¥º¤ò·èÄꤹ¤ë¤Î¤ËÍøÍѤǤ¤Þ¤¹¡£
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.Dq Va etext No + Va rlim.rlim_max
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¤ò±Û¤¨¤ë¥Ö¥ì¡¼¥¯¤òÀßÄꤹ¤ë¤³¤È¤Ï¤Ç¤¤Þ¤»¤ó¡£
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.Va rlim.rlim_max
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¤Ï
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.Fn getrlimit RLIMIT_DATA &rlim
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¤Î¸Æ¤Ó½Ð¤·¤«¤éÊÖ¤µ¤ì¤¿ÃͤǤ¹
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.Pf ( Va etext
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¤ÎÄêµÁ¤Ë¤Ä¤¤¤Æ¤Ï
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.Xr end 3
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¤ò»²¾È¤·¤Æ¤¯¤À¤µ¤¤)¡£
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.Sh Ìá¤êÃÍ
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.Rv -std brk
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.Pp
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.Fn sbrk
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´Ø¿ô¤Ï¡¢À®¸ù¤¹¤ë¤È¸Å¤¤¥Ö¥ì¡¼¥¯ÃͤòÊÖ¤·¤Þ¤¹¡£
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¼ºÇÔ¤¹¤ë¤È¡¢ÃÍ
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.Po Vt "void *" Pc Ns \-1
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¤¬ÊÖ¤·¡¢¥°¥í¡¼¥Ð¥ëÊÑ¿ô
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.Va errno
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¤Ë¥¨¥é¡¼¤òɽ¤¹ÃͤòÀßÄꤷ¤Þ¤¹¡£
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.Sh ¥¨¥é¡¼
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.Fn brk
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¤ª¤è¤Ó
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.Fn sbrk
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´Ø¿ô¤Ï¡¢¼¡¤Î¾ì¹ç¤Ë½èÍý¤Ë¼ºÇÔ¤·¤Þ¤¹:
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.Bl -tag -width Er
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.It Bq Er EINVAL
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Í׵ᤵ¤ì¤¿¥Ö¥ì¡¼¥¯Ãͤ¬¥Ç¡¼¥¿¥»¥°¥á¥ó¥È¤ÎÀèƬ¤ò±Û¤¨¤Æ¤¤¤Þ¤¹¡£
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.It Bq Er ENOMEM
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.Xr setrlimit 2
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¤¬ÀßÄꤷ¤¿¥Ç¡¼¥¿¥»¥°¥á¥ó¥È¥µ¥¤¥º¤Î¸Â³¦¤ò±Û¤¨¤Æ¤¤¤Þ¤¹¡£
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.It Bq Er ENOMEM
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¥Ç¡¼¥¿¥»¥°¥á¥ó¥È¤Î³ÈÄ¥¤ËɬÍפʥ¹¥ï¥Ã¥×ÎΰèÆâ¤Î¶õ´Ö¤¬ÉÔ½¼Ê¬¤Ç¤¹¡£
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.El
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.Sh ´ØÏ¢¹àÌÜ
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.Xr execve 2 ,
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.Xr getrlimit 2 ,
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.Xr mmap 2 ,
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.Xr end 3 ,
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.Xr free 3 ,
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.Xr malloc 3
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.Sh ¥Ð¥°
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.Fn brk
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¤Þ¤¿¤Ï
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.Fn sbrk
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¤È¡¢
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.Xr malloc 3 ,
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.Xr free 3
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.Sh Îò»Ë
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.Fn brk
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.At v7
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