Import translated manuals from JM CVS Repository.

[linuxjm/jm.git] / manual / util-linux / draft / man8 / rdev.8

.\" Copyright 1992, 1993 Rickard E. Faith (faith@cs.unc.edu)
.\" May be distributed under the GNU General Public License
.\" Changes from sct@dcs.ed.ac.uk added Sat Oct  9 09:54:00 1993.
.\"
.\" Japanese Version Copyright (c) 1997 Koso Fukuba
.\"         all rights reserved.
.\" Translated Mon Jan 27 12:00:00 JST 1997
.\"         by Koso Fukuba <koso@ga2.so-net.or.jp>
.\" Updated and Modified Mon Feb 26 19:23:38 JST 2001
.\"         by Yuichi SATO <sato@complex.eng.hokudai.ac.jp>
.\" Updated Sat Jun  9 JST 2001 by Kentaro Shirakata <argrath@ub32.org>
.\" Updated Tue May 10 JST 2005 by Kentaro Shirakata <argrath@ub32.org>
.\"
.TH RDEV 8 "20 November 1993" "Linux 0.99" "Linux Programmer's Manual"
.\"O .SH NAME
.SH ̾Á°
.\"O rdev \- query/set image root device, RAM disk size, or video mode
rdev \- ¥ë¡¼¥È¥Ç¥Ð¥¤¥¹¡¦RAM ¥Ç¥£¥¹¥¯¥µ¥¤¥º¡¦¥Ó¥Ç¥ª¥â¡¼¥É¤ÎÌ䤤¹ç¤ï¤»¤ÈÀßÄê
.\"O .SH SYNOPSIS
.SH ½ñ¼°
.nf
.BR "rdev [ \-rvh ] [ \-o " offset " ] [ " image " [ " value " [ " offset " ] ] ]"
.BR "rdev [ \-Rrvh ] [ \-o " offset " ] [ " image " [ " value " [ " offset " ] ] ]"
.BR "ramsize [ \-o " offset " ] [ " image " [ " size " [ " offset " ] ] ]"
.BR "vidmode [ \-o " offset " ] [ " image " [ " mode " [ " offset " ] ] ]"
.BR "rootflags [ \-o " offset " ] [ " image " [ " flags " [ " offset " ] ] ]"
.fi
.\"O .SH DESCRIPTION
.SH ÀâÌÀ
.\"O With no arguments,
.\"O .B rdev
.\"O outputs an
.\"O .I /etc/mtab
.\"O line for the current root file system.
.B rdev
¤ò°ú¿ô¤Ê¤·¤Çµ¯Æ°¤¹¤ë¤È¡¢¸½ºß¤Î¥ë¡¼¥È¥Õ¥¡¥¤¥ë¥·¥¹¥Æ¥à¤ËÂбþ¤¹¤ë
.I /etc/mtab
¤Î¥¨¥ó¥È¥ê¤òɽ¼¨¤¹¤ë¡£
.\"O With no arguments,
.\"O .BR ramsize ", " vidmode ", and " rootflags
.\"O print usage information.
.BR ramsize ", " vidmode ", " rootflags
¤ò°ú¿ô¤Ê¤·¤Çµ¯Æ°¤¹¤ë¤È¡¢»ÈÍÑÊýË¡¤¬É½¼¨¤µ¤ì¤ë¡£

.\"O In a bootable image for the Linux kernel on i386, there are several pairs
.\"O of bytes which specify the root device, the video mode, and the size of
.\"O the RAM disk.  These pairs of bytes, by default, begin
.\"O at offset 504 (decimal) in the kernel image:
i386 ¤Î Linux ¥«¡¼¥Í¥ë¤Î¥Ö¡¼¥È²Äǽ¤Ê¥¤¥á¡¼¥¸¤Ë¤Ï¡¢¥ë¡¼¥È¥Ç¥Ð¥¤¥¹¡¦¥Ó¥Ç¥ª¥â¡¼¥É¡¦
RAM ¥Ç¥£¥¹¥¯¥µ¥¤¥º¤ò»ØÄꤹ¤ë¤¿¤á¤Î¿ô¥Ð¥¤¥È¤ÎÎΰ褬¤¢¤ë¡£
¥Ç¥Õ¥©¥ë¥È¤Ç¤Ï¡¢¤³¤ì¤é¤ÎÎΰè¤Ï
¥«¡¼¥Í¥ë¥¤¥á¡¼¥¸¤Î¥ª¥Õ¥»¥Ã¥È 504 (10 ¿Ê) ¤«¤é»Ï¤Þ¤ë¡£

.nf
.RS
.\"O  498 Root flags
.\"O (500 and 502 Reserved)
.\"O  504 RAM Disk Size
.\"O  506 VGA Mode
.\"O  508 Root Device
.\"O  (510 Boot Signature)
 498 ¥ë¡¼¥È¥Õ¥é¥°
(500 ¤È 502 ¤ÏͽÌ󤵤ì¤Æ¤¤¤ë)
 504 RAM ¥Ç¥£¥¹¥¯¥µ¥¤¥º
 506 VGA ¥â¡¼¥É
 508 ¥ë¡¼¥È¥Ç¥Ð¥¤¥¹
(510 ¥Ö¡¼¥È¥·¥°¥Í¥Á¥ã)
.RE
.fi

.\"O .B rdev
.\"O will change these values.
.B rdev
¤Ï¡¢¤³¤ì¤é¤ÎÃͤòÊѹ¹¤¹¤ë¡£

.\"O Typical values for the
.\"O .I image
.\"O parameter, which is a bootable Linux kernel image, might be:
¥Ö¡¼¥È²Äǽ¤Ê Linux ¥«¡¼¥Í¥ë¥¤¥á¡¼¥¸
.I image
¤ò»ØÄꤹ¤ë¾ì¹ç¤Îŵ·¿Åª¤ÊÃͤϡ¢¼¡¤Î¤è¤¦¤Ê¤â¤Î¤Ç¤¢¤ë:

.nf
.RS
/vmlinux
/vmunix
/boot/bzImage-2.4.0
/dev/fd0
/dev/fd1
.RE
.fi

.\"O When using the
.\"O .B rdev
.\"O command, the
.\"O .I root_device
.\"O parameter might be something like:
.B rdev
¥³¥Þ¥ó¥É¤ò»ÈÍѤ¹¤ë¾ì¹ç¡¢
.I root_device
¥Ñ¥é¥á¡¼¥¿¤Ï°Ê²¼¤Î¤è¤¦¤Ê¤â¤Î¤Ç¤¢¤ë:

.nf
.RS
/dev/hda1
/dev/hdf13
/dev/sda2
/dev/sdc4
/dev/ida/c0d0p1
.RE
.fi

.\"O One may also specify the device by a comma-separated pair
.\"O of decimal integers
.\"O .IR major , minor .
¤¢¤ë¤¤¤Ï¡¢¥Ç¥Ð¥¤¥¹¤ò¥³¥ó¥Þ¤Ç¶èÀÚ¤é¤ì¤¿½½¿Ê¿ô¤ÎÁÈ
.IR major , minor
¤Ç¥Ç¥Ð¥¤¥¹¤ò»ØÄꤹ¤ë¤³¤È¤â¤Ç¤­¤ë¡£

.\"O For the
.\"O .B ramsize
.\"O command, the
.\"O .B size
.\"O parameter specifies the size of the RAM disk in kilobytes.
.B ramsize
¥³¥Þ¥ó¥É¤Ç¤Ï¡¢
.B size
¥Ñ¥é¥á¡¼¥¿¤Ë RAM ¥Ç¥£¥¹¥¯¥µ¥¤¥º¤ò¥­¥í¥Ð¥¤¥È(KB) ñ°Ì¤Ç»ØÄꤹ¤ë¡£

.\"O For the
.\"O .B rootflags
.\"O command, the
.\"O .B flags
.\"O parameter contains extra information used when mounting root.
.B rootflags
¥³¥Þ¥ó¥É¤Ç¤Ï¡¢
.B flags
¥Ñ¥é¥á¡¼¥¿¤Ë¡¢
¥ë¡¼¥È¥Ç¥£¥¹¥¯¤ò¥Þ¥¦¥ó¥È¤¹¤ë¤È¤­¤Ë»ÈÍѤµ¤ì¤ë¥ª¥×¥·¥ç¥ó¾ðÊó¤ò»ØÄꤹ¤ë¡£
.\"O Currently the only effect of these flags is to force the kernel to
.\"O mount the root filesystem in readonly mode if 
.\"O .B flags
.\"O is non-zero.
º£¤Î¤È¤³¤í¤³¤ì¤é¤Î¥Õ¥é¥°¤Î¸ú²Ì¤Ï¤Ò¤È¤Ä¤À¤±¤Ç¡¢
.B flags
¤¬¥¼¥í¤Ç¤Ê¤¤¤È¡¢¥«¡¼¥Í¥ë¤Ï¥ë¡¼¥È¥Õ¥¡¥¤¥ë¥·¥¹¥Æ¥à¤ò
¥ê¡¼¥É¥ª¥ó¥ê¡¼¥â¡¼¥É¤Ç¥Þ¥¦¥ó¥È¤¹¤ë¡¢¤È¤¤¤¦¤À¤±¤Ç¤¢¤ë¡£

.\"O For the
.\"O .B vidmode
.\"O command, the
.\"O .B mode
.\"O parameter specifies the video mode:
.B vidmode
¥³¥Þ¥ó¥É¤Ç¤Ï¡¢
.B mode
¥Ñ¥é¥á¡¼¥¿¤Ë°Ê²¼¤Î¥Ó¥Ç¥ª¥â¡¼¥É¤ò»ØÄꤹ¤ë:

.nf
.RS
.\"O -3 = Prompt
.\"O -2 = Extended VGA
.\"O -1 = Normal VGA
.\"O  0 = as if "0" was pressed at the prompt
.\"O  1 = as if "1" was pressed at the prompt
.\"O  2 = as if "2" was pressed at the prompt
.\"O  n = as if "n" was pressed at the prompt
-3 = ¥×¥í¥ó¥×¥È
-2 = Extended VGA
-1 = Normal VGA
 0 = ¥×¥í¥ó¥×¥È¤Ç "0" ¤¬ÆþÎϤµ¤ì¤¿¤Î¤ÈƱ¤¸Æ¯¤­¤ò¤¹¤ë¡£
 1 = ¥×¥í¥ó¥×¥È¤Ç "1" ¤¬ÆþÎϤµ¤ì¤¿¤Î¤ÈƱ¤¸Æ¯¤­¤ò¤¹¤ë¡£
 2 = ¥×¥í¥ó¥×¥È¤Ç "2" ¤¬ÆþÎϤµ¤ì¤¿¤Î¤ÈƱ¤¸Æ¯¤­¤ò¤¹¤ë¡£
 n = ¥×¥í¥ó¥×¥È¤Ç "n" ¤¬ÆþÎϤµ¤ì¤¿¤Î¤ÈƱ¤¸Æ¯¤­¤ò¤¹¤ë¡£
.RE
.fi

.\"O If the
.\"O .I value
.\"O is not specified, the
.\"O .I image
.\"O will be examined to determine the current settings.
.I value
¤¬»ØÄꤵ¤ì¤Ê¤¤¾ì¹ç¡¢¸½ºß¤ÎÀßÄê¤ò·è¤á¤ë¤¿¤á¤Ë
.I image
¤¬Ä´¤Ù¤é¤ì¤ë¡£
.\"O .SH OPTIONS
.SH ¥ª¥×¥·¥ç¥ó
.TP
.B \-r
.\"O Causes
.\"O .B rdev
.\"O to act like
.\"O .BR ramsize .
.B rdev
¤Ë
.B ramsize
¤ÈƱ¤¸Æ°ºî¤ò¤µ¤»¤ë¡£
.TP
.B \-R
.\"O Causes
.\"O .B rdev
.\"O to act like
.\"O .BR rootflags .
.B rdev
¤Ë
.B rootflags
¤ÈƱ¤¸Æ°ºî¤ò¤µ¤»¤ë¡£
.TP
.B \-v
.\"O Causes
.\"O .B rdev
.\"O to act like
.\"O .BR vidmode .
.B rdev
¤Ë
.B vidmode
¤ÈƱ¤¸Æ°ºî¤ò¤µ¤»¤ë¡£
.TP
.B \-h
.\"O Provides help.
¥Ø¥ë¥×¥á¥Ã¥»¡¼¥¸¤ò½ÐÎϤ¹¤ë¡£
.\"O .SH BUGS
.SH ¥Ð¥°
.\"O The
.\"O .B rdev
.\"O utility, when used other than to find a name for the current root device,
.\"O is an ancient hack that works by patching a kernel image at a magic offset
.\"O with magic numbers. It does not work on architectures other than i386.
.B rdev
¥æ¡¼¥Æ¥£¥ê¥Æ¥£¤Î¡¢¸½ºß¤Î¥ë¡¼¥È¥Ç¥Ð¥¤¥¹Ì¾¤òɽ¼¨¤¹¤ë°Ê³°¤Îµ¡Ç½¤Ï¡¢
¥«¡¼¥Í¥ë¥¤¥á¡¼¥¸¤Î·è¤áÂǤÁ¤Î¥ª¥Õ¥»¥Ã¥È¤Ë·è¤áÂǤÁ¤Î¿ôÃͤò½ñ¤­¹þ¤à¤³¤È¤Ë¤è¤Ã¤Æ
Æ°ºî¤¹¤ë¡¢¤¤¤Ë¤·¤¨¤Î¥Ï¥Ã¥¯¤Ç¤¢¤ë¡£
¤³¤ì¤Ï i386 °Ê³°¤Î¥¢¡¼¥­¥Æ¥¯¥Á¥ã¤Ç¤ÏÆ°ºî¤·¤Ê¤¤¡£
.\"O Its use is strongly discouraged. Use a boot loader like SysLinux or LILO
.\"O instead.
¤³¤ì¤Î»ÈÍѤÏÁ´¤¯¿ä¾©¤Ç¤­¤Ê¤¤¡£
SysLinux ¤ä LILO ¤Î¤è¤¦¤Ê¥Ö¡¼¥È¥í¡¼¥À¤òÂå¤ï¤ê¤Ë»È¤¦¤³¤È¡£
.\"O .SH HISTORY
.SH Îò»Ë
.\"O At offset 502 there used to be the device number of the swap device
.\"O (in Linux 0.12), and "rdev -s" or "swapdev" would set this.
¥ª¥Õ¥»¥Ã¥È 502 ¤Ï°ÊÁ° (Linux 0.12 ¤Îº¢) ¥¹¥ï¥Ã¥×¥Ç¥Ð¥¤¥¹¤Î
¥Ç¥Ð¥¤¥¹ÈÖ¹æ¤È¤·¤Æ»È¤ï¤ì¤Æ¤ª¤ê¡¢
"rdev -s" ¤ä "swapdev" ¤Ç¤½¤ì¤òÀßÄê¤Ç¤­¤¿¡£
.\"O However, since Linux 0.95 this constant is not used any longer,
.\"O and the swap device is specified using the
.\"O .BR swapon (2)
.\"O system call.
¤·¤«¤·¡¢ Linux 0.95 ¤«¤é¤Ï¤³¤ÎÄê¿ô¤Ï»È¤ï¤ì¤Ê¤¯¤Ê¤ê¡¢
¥¹¥ï¥Ã¥×¥Ç¥Ð¥¤¥¹¤Ï
.BR swapon (2)
¥·¥¹¥Æ¥à¥³¡¼¥ë¤Ç»ØÄꤹ¤ë¤è¤¦¤Ë¤Ê¤Ã¤¿¡£

.\"O At offset 504 there used to be the size of the ramdisk in kilobytes.
.\"O One would specify a size, and this much was grabbed off the top of memory.
¤³¤³¤Ç¥ª¥Õ¥»¥Ã¥È 504 ¤Ï¥é¥à¥Ç¥£¥¹¥¯¤ÎÍÆÎÌ(¥­¥í¥Ð¥¤¥Èñ°Ì)¤È¤·¤Æ»È¤ï¤ì¤Æ¤¤¤¿¡£
¤³¤ì¤ÏÍÆÎ̤ò»ØÄꤷ¡¢¥á¥â¥ê¤ÎÀèƬ¤«¤é¼è¤é¤ì¤Æ¤¤¤¿¡£
.\"O In Linux 1.1.39 it became also possible to set this value on the kernel
.\"O command line.
Linux 1.1.39 ¤Ç¡¢¤³¤ÎÃͤò¥«¡¼¥Í¥ë¥³¥Þ¥ó¥É¥é¥¤¥ó¤«¤é¤âÀßÄê¤Ç¤­¤ë¤è¤¦¤Ë¤Ê¤Ã¤¿¡£
.\"O In Linux 1.3.48 the ramdisk setup was changed. Ramdisk memory is now
.\"O taken from the buffer cache, so that the ramdisk can grow dynamically.
Linux 1.3.48 ¤Ç¡¢¥é¥à¥Ç¥£¥¹¥¯¤ÎÀßÄêÊýË¡¤¬Êѹ¹¤µ¤ì¤¿¡£
¥é¥à¥Ç¥£¥¹¥¯¤Î¥á¥â¥ê¤Ï¥Ð¥Ã¥Õ¥¡¥­¥ã¥Ã¥·¥å¤«¤é¼è¤é¤ì¤ë¤è¤¦¤Ë¤Ê¤ê¡¢
¤½¤Î¤¿¤á¡¢¥é¥à¥Ç¥£¥¹¥¯¤ÎÍÆÎ̤òưŪ¤ËÁý²Ã¤µ¤»¤ë¤³¤È¤¬¤Ç¤­¤ë¤è¤¦¤Ë¤Ê¤Ã¤¿¡£
.\"O The interpretation of the ramdisk word was changed to a word of which
.\"O the high order bit is a prompt flag (1: prompt for ramdisk:
.\"O "VFS: Insert ramdisk floppy and press ENTER" - this is needed with a
.\"O two-floppy boot), the next bit a load flag (1: load ramdisk),
.\"O and the low order 11 bits give the starting block number of the
.\"O root filesystem image (so that one can have a single floppy boot).
¥é¥à¥Ç¥£¥¹¥¯¥ï¡¼¥É¤Î²ò¼á¤âÊѹ¹¤µ¤ì¡¢ºÇ¾å°Ì¥Ó¥Ã¥È¤Ï¥×¥í¥ó¥×¥È¥Õ¥é¥°
(1: ¥é¥à¥Ç¥£¥¹¥¯¤Î¤¿¤á¤Î¥×¥í¥ó¥×¥È
"VFS: Insert ramdisk floppy and press ENTER" ¤òɽ¼¨¤¹¤ë - ¤³¤ì¤Ï
¥Õ¥í¥Ã¥Ô¡¼ 2 Ëç¤Ë¤è¤ë¥Ö¡¼¥È¤ËɬÍפǤ¢¤ë)¡¢¼¡¤Î¥Ó¥Ã¥È¤Ï¥í¡¼¥É¥Õ¥é¥°
(1: ¥é¥à¥Ç¥£¥¹¥¯¤ËÆɤ߹þ¤à)¡¢¤½¤·¤Æ²¼°Ì¤Î 11 ¥Ó¥Ã¥È¤Ï(¥Õ¥í¥Ã¥Ô¡¼ 1 Ëç¤Ë¤è¤ë
¥Ö¡¼¥È¤Î¤¿¤á¤Î)¥ë¡¼¥È¥Õ¥¡¥¤¥ë¥·¥¹¥Æ¥à¥¤¥á¡¼¥¸¤Î³«»Ï¥Ö¥í¥Ã¥¯ÈÖ¹æ¤È¤Ê¤Ã¤¿¡£
.\"O See also
.\"O .IR linux/Documentation/ramdisk.txt .
.I linux/Documentation/ramdisk.txt
¤â»²¾È¤Î¤³¤È¡£
.\"O .SH AUTHORS
.SH Ãø¼Ô
.nf
.\"O Originally by Werner Almesberger (almesber@nessie.cs.id.ethz.ch)
.\"O Modified by Peter MacDonald (pmacdona@sanjuan.UVic.CA)
.\"O rootflags support added by Stephen Tweedie (sct@dcs.ed.ac.uk)
½éÈÇ¡¢Werner Almesberger (almesber@nessie.cs.id.ethz.ch)
Êѹ¹¡¢Peter MacDonald (pmacdona@sanjuan.UVic.CA)
rootflags ¥µ¥Ý¡¼¥È¤ÎÄɲá¢Stephen Tweedie (sct@dcs.ed.ac.uk)
.fi