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[linuxjm/jm.git] / manual / LDP_man-pages / release / man2 / iopl.2

.\" Hey Emacs! This file is -*- nroff -*- source.
.\"
.\" Copyright 1993 Rickard E. Faith (faith@cs.unc.edu)
.\" Portions extracted from linux/kernel/ioport.c (no copyright notice).
.\"
.\" Permission is granted to make and distribute verbatim copies of this
.\" manual provided the copyright notice and this permission notice are
.\" preserved on all copies.
.\"
.\" Permission is granted to copy and distribute modified versions of this
.\" manual under the conditions for verbatim copying, provided that the
.\" entire resulting derived work is distributed under the terms of a
.\" permission notice identical to this one.
.\"
.\" Since the Linux kernel and libraries are constantly changing, this
.\" manual page may be incorrect or out-of-date.  The author(s) assume no
.\" responsibility for errors or omissions, or for damages resulting from
.\" the use of the information contained herein.  The author(s) may not
.\" have taken the same level of care in the production of this manual,
.\" which is licensed free of charge, as they might when working
.\" professionally.
.\"
.\" Formatted or processed versions of this manual, if unaccompanied by
.\" the source, must acknowledge the copyright and authors of this work.
.\"
.\" Modified Tue Aug  1 16:47    1995 by Jochen Karrer
.\"                              <cip307@cip.physik.uni-wuerzburg.de>
.\" Modified Tue Oct 22 08:11:14 EDT 1996 by Eric S. Raymond <esr@thyrsus.com>
.\" Modified Fri Nov 27 14:50:36 CET 1998 by Andries Brouwer <aeb@cwi.nl>
.\" Modified, 27 May 2004, Michael Kerrisk <mtk.manpages@gmail.com>
.\"     Added notes on capability requirements
.\"
.\" Japanese Version Copyright (c) 1997 HORIMOTO Masafumi
.\"         all rights reserved.
.\" Translated 1997-09-29, HORIMOTO Masafumi
.\" Modified 1999-04-03, HANATAKA Shinya <hanataka@abyss.rim.or.jp>
.\" Updated 2003-10-12, Kentaro Shirakata <argrath@ub32.org>
.\" Updated 2005-02-24, Akihiro MOTOKI <amotoki@dd.iij4u.or.jp>
.\"
.TH IOPL 2 2004-05-27 "Linux" "Linux Programmer's Manual"
.SH ̾Á°
iopl \- I/O Æø¢¥ì¥Ù¥ë¤òÊѹ¹¤¹¤ë
.SH ½ñ¼°
.B #include <sys/io.h>
.sp
.BI "int iopl(int " level );
.SH ÀâÌÀ
.BR iopl ()
¤Ï¸Æ¤Ó½Ð¤·¸µ¤Î¥×¥í¥»¥¹¤Î I/O Æø¢¥ì¥Ù¥ë¤ò
.I level
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.BR ioperm (2)
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.BR fork (2)
¤ä
.BR exec (2)
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.SH ÊÖ¤êÃÍ
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.I errno
¤ËŬÀÚ¤ÊÃͤ¬ÀßÄꤵ¤ì¤ë¡£
.SH ¥¨¥é¡¼
.TP
.B EINVAL
°ú¤­¿ô
.I level
¤¬ 3 ¤è¤êÂ礭¤¤¡£
.TP
.B ENOSYS
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¸Æ¤Ó½Ð¤·¸µ¥×¥í¥»¥¹¤Ë
.BR iopl ()
¤ò¸Æ¤Ó½Ð¤¹¤Î¤Ë½½Ê¬¤Ê¸¢¸Â¤¬¤Ê¤«¤Ã¤¿¡£
.BR iopl ()
¤ò¸Æ¤Ó½Ð¤¹¤Ë¤Ï
.B CAP_SYS_RAWIO
¥±¡¼¥Ñ¥Ó¥ê¥Æ¥£¤¬É¬ÍפǤ¢¤ë¡£
.SH ½àµò
.BR iopl ()
¤Ï Linux ÆÃÍ­¤Î´Ø¿ô¤Ç¤¢¤ê¡¢°Ü¿¢¤ò°Õ¿Þ¤·¤¿¥×¥í¥°¥é¥à¤Ç
»ÈÍѤ·¤Æ¤Ï¤Ê¤é¤Ê¤¤¡£
.SH Ãí°Õ
libc5 ¤Ç¤Ï¥·¥¹¥Æ¥à¥³¡¼¥ë¤È¤·¤Æ°·¤¤
.I <unistd.h>
¤Ë¥×¥í¥È¥¿¥¤¥×¤¬Â¸ºß¤·¤Æ¤¤¤ë¡£
glibc1 ¤Ë¤Ï¥×¥í¥È¥¿¥¤¥×¤Ï¸ºß¤·¤Æ¤¤¤Ê¤¤¡£
glibc2 ¤Ï
.I <sys/io.h>
¤È
.I <sys/perm.h>
¤ÎξÊý¤Ë¥×¥í¥È¥¿¥¤¥×¤ò»ý¤Ã¤Æ¤¤¤ë¡£
¸å¼Ô¤Ï i386 ¤Î¤ß¤ÇÍøÍѲÄǽ¤Ê¤Î¤Ç¡¢»ÈÍѤ¹¤Ù¤­¤Ç¤Ï¤Ê¤¤¡£
.SH ´ØÏ¢¹àÌÜ
.BR ioperm (2),
.BR capabilities (7)