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.\" Copyright (C) 1996 Andries Brouwer (aeb@cwi.nl)
.\"
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.\" Modified Fri Jan 31 16:38:25 1997 by Eric S. Raymond <esr@thyrsus.com>
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.\" Japanese Version Copyright (c) 1997 SUTO, Mitsuaki
.\"         all rights reserved.
.\" Translated Thu Jun 26 21:00:25 JST 1997
.\"         by SUTO, Mitsuaki <suto@av.crl.sony.co.jp>
.\" Updated & Modified Mon Mar 1 1999
.\"         by NAKANO Takeo <nakano@apm.seikei.ac.jp>
.\"
.\"WORD		file descriptor		ե뵭һ
.\"
.TH MMAP 2 "12 April 1996" "Linux 1.3.86" "Linux Programmer's Manual"
.SH ̾
mmap, munmap \- եǥХ˥ޥå/ޥåפ
.SH 
.B #include <unistd.h>
.br
.B #include <sys/mman.h>
.sp
.B #ifdef _POSIX_MAPPED_FILES
.sp
.BI "void * mmap(void *" start ", size_t " length ", int " prot
.BI ", int " flags ", int " fd ", off_t " offset );
.sp
.BI "int munmap(void *" start ", size_t " length );
.sp
.B #endif
.SH 
.B mmap
ؿ
.I fd
ǻꤵ줿ե(⤷Ϥ¾Υ֥)Ρեå
.I offset

.I length
ХȤϰϤ˥ޥåפ(ĥդ)
ΤȤʤ٤
.IR start
ɥ쥹Ϥ褦˥ޥåפ롣Υɥ쥹ϼºݤϴؿФ
ΥҥȤǤʤ̾ 0 ꤹ롣
ºݤ˥֥Ȥޥåפ줿ɥ쥹
.BR mmap
֤ͤ˥åȤ롣

.I prot
ˤϥݸɤΤ褦˹Ԥʤ(Υ꤬ɤΤ褦˻Ȥ뤫)
ꤹ롣
ʲΤ褦ʥӥåȥǡ¸ߤ롣
.TP 1.1i
.B PROT_EXEC
ڡϼ¹ԲǽǤ롣
.TP
.B PROT_READ
ڡɤ߹߲ǽǤ롣
.TP
.B PROT_WRITE
ڡ˽񤭹߲ǽǤ롣
.TP
.B PROT_NONE
ڡˤϥǤʤ
.LP

.I flags
ˤϡޥåפ줿֥ȤΥסޥå׻ΥץȤȤˡ
ޥåפ줿ڡԡؤѹԤΤƤӽФץʤΤ
Ȥ⤽Υڡ򻲾Ȥ¾ΥץǽʤΤꤹ롣
ʲΤ褦ʥӥåȥǡ¸ߤ롣
.TP 1.1i
.B MAP_FIXED
ꤵ줿ɥ쥹ʳΥɥ쥹˥ޥåԥ󥰤Ԥʤʤ
⤷ꤵ줿ɥ쥹ѤǤʤ硢
.B mmap
ϼԤ롣 MAP_FIXED ꤷ
.I start
ϥڡܿǤʤƤϤʤ
ΥץϻѤʤɤ
.TP
.B MAP_SHARED
Υޥåԥ󥰤򡢤Υ֥Ȥޥåפ
ƤΥץǶͭ롣
.TP
.B MAP_PRIVATE
ץ饤١Ȥ copy-on-write (񤭹߻ԡ) ޥåפ롣
.LP
MAP_SHARED  MAP_PRIVATE ϡɬɤ餫ҤȤĤ
ꤷʤФʤʤ
.LP
ʾ3ĤΥե饰 POSIX.1b ( POSIX.4) ǵꤵƤ롣
Linux ˤϤ¾ MAP_DENYWRITE, MAP_EXECUTABLE, MAP_ANON(YMOUS)
롣

ƥॳ
.B munmap
ϻꤵ줿ɥ쥹ϰϤΥޥåפõʹߤΤϰؤλȤ
̵ʥ껲Ȥˤ롣

.SH ֤
.B mmap
ȥޥåפ줿ΰؤΥݥ󥿤֤
Ԥ MAP_FAILED (\-1) ֤
.I errno
顼ƤˤäƥåȤ롣
.B munmap
 0 ֤Ԥ \-1 ֤
.I errno
åȤ (餯 EINVAL ˤʤ)
.SH 顼
.TP
.B EBADF
.I fd
ͭʥե뵭һ (file descriptor) ǤϤʤ
( MAP_ANONYMOUS åȤƤʤ)
.TP
.B EACCES
MAP_PRIVATE ׵ᤷ
.I fd
ɤ߹Ѥ˥ץ󤵤Ƥʤ
ޤ MAP_SHARED ׵ᤷ PROT_WRITE 򥻥åȤ
.I fd
Ͻ񤭹Ѥ˥ץ󤵤Ƥʤ
.TP
.B EINVAL
.I start

.I length

.IR offset 
դʤ
(Ĥޤ礭뤫 PAGESIZE ˥饤ȤƤʤ)
.TP
.B ETXTBUSY
MAP_DENYWRITE åȤƤ뤬
.I fd
ǻꤵƤ륪֥ȤϽ񤭹Ѥ˳Ƥ롣
.TP
.B EAGAIN
ե뤬åƤ롣ޤϥåƤ꤬¿롣
.TP
.B ENOMEM
˶ʤ
.SH 
SVr4, POSIX.1b ( POSIX.4), 4.4BSDSVr4 ˤ¾ ENXIO  ENODEV 
Υ顼ɤˤĤƤεҤ롣
.SH Ϣ
.BR getpagesize (2),
.BR msync (2),
.BR shm_open (2),
B.O. Gallmeister, POSIX.4, O'Reilly, pp. 128-129 and 389-391.