From: Christophe Saout <christophe@saout.de>
To: "Dimitry V. Ketov" <Dimitry.Ketov@avalon.ru>
Cc: linux-kernel@vger.kernel.org
Subject: RE: Partitioned loop device..
Date: 18 Jul 2003 16:20:27 +0200 [thread overview]
Message-ID: <1058538027.19986.3.camel@chtephan.cs.pocnet.net> (raw)
In-Reply-To: <E1B7C89B8DCB084C809A22D7FEB90B3840AB@frodo.avalon.ru>
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Am Di, 2003-07-15 um 20.32 schrieb Dimitry V. Ketov:
> > You can already use Device-Mapper to create "partitions" on
> > your loop devices,
> You're right but I want _partitions_ but not "partitions" ;)
> It should appears like a real hardware disk, not virtual one.
I just hacked up an ugly small shell script, that uses sfdisk and
dmsetup to create the partition devices over any block device.
Just dmsetup-partitions /dev/loop0 or something.
It will then create devices /dev/mapper/loop0p1, etc... just like hda1
and so on. To remove them use "dmsetup remove loop0p1", etc...
--
Christophe Saout <christophe@saout.de>
Please avoid sending me Word or PowerPoint attachments.
See http://www.fsf.org/philosophy/no-word-attachments.html
[-- Attachment #2: dmsetup-partitions --]
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#!/bin/sh
SFDISK="`which sfdisk`"
DMSETUP="`which dmsetup`"
if test -z "$1"; then
echo "Syntax: $0 <block device>"
exit 1
fi
DEVDIR="`dirname \"\$1\"`"
DEVFILE="`basename \"\$1\"`"
if ! echo "$DEVDIR" | grep '^/' &> /dev/null; then
DEVDIR="`pwd`/$DEVDIR/"
else
DEVDIR="$DEVDIR/"
fi
while echo "$DEVDIR" | grep '/\./' &> /dev/null; do
DEVDIR="`echo \"\$DEVDIR\" | sed -e 's/\/\.\//\//g'`"
done
while echo "$DEVDIR" | grep '/[^/][^/]*/\.\./' &> /dev/null; do
DEVDIR="`echo \"\$DEVDIR\" | sed -e 's/\/[^/][^/]*\/\.\.\//\//g'`"
done
DEVICE="$DEVDIR$DEVFILE"
if ! test -b "$DEVICE" -a -r "$DEVICE"; then
echo "Error: Block device $1 can't be accessed"
exit 1
fi
if ! test -n "$SFDISK" -a -x "$SFDISK"; then
echo "Error: sfdisk utility not found"
exit 1
fi
if ! test -n "$DMSETUP" -a -x "$DMSETUP"; then
echo "Error: dmsetup utility not found"
exit 1
fi
if test -L "$DEVICE"; then
DEVICE_="`readlink \"\$DEVICE\"`"
DEVDIR_="`dirname \"\$DEVICE_\"`"
DEVFILE_="`basename \"\$DEVICE_\"`"
if ! echo "$DEVDIR_" | grep '^/' &> /dev/null; then
DEVDIR_="$DEVDIR$DEVDIR_/"
else
DEVDIR_="$DEVDIR_/"
fi
while echo "$DEVDIR_" | grep '/\./' &> /dev/null; do
DEVDIR_="`echo \"\$DEVDIR_\" | sed -e 's/\/\.\//\//g'`"
done
while echo "$DEVDIR_" | grep '/[^/][^/]*/\.\./' &> /dev/null; do
DEVDIR_="`echo \"\$DEVDIR_\" | sed -e 's/\/[^/][^/]*\/\.\.\//\//g'`"
done
DEVICE_="$DEVDIR_$DEVFILE_"
else
DEVICE_="$DEVICE"
fi
TMP="/tmp/partscript.$$"
"$SFDISK" -d "$DEVICE" | grep "^ *$DEVDIR" | sed -e 's/[=,]/ /g' | awk '{ print $1 " " $4 " " $6 }' | \
while read DEV START SIZE; do
DEV="`echo \"\$DEV\" | sed -e 's/^\/dev\///' -e 's/\//-/g'`"
test "$SIZE" -gt 0 || continue
echo $DEV $START $SIZE
echo "0 $SIZE linear $DEVICE_ $START" > $TMP
"$DMSETUP" create $DEV $TMP
done
next prev parent reply other threads:[~2003-07-18 14:11 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-07-15 18:32 Partitioned loop device Dimitry V. Ketov
2003-07-15 21:15 ` Lars Marowsky-Bree
2003-07-18 14:20 ` Christophe Saout [this message]
2003-07-18 19:10 ` Mr. James W. Laferriere
2003-07-18 23:57 ` Christophe Saout
-- strict thread matches above, loose matches on Subject: below --
2003-07-16 8:59 Dimitry V. Ketov
2003-07-16 13:51 ` Kevin Corry
2003-07-15 8:46 Dimitry V. Ketov
2003-07-15 15:01 ` Kevin Corry
2003-07-15 15:53 ` Josh Litherland
2003-07-15 16:04 ` Kevin Corry
2003-07-15 16:05 ` Herbert Pötzl
2003-07-17 2:44 ` kernel
2003-07-15 7:10 Dimitry V. Ketov
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