Re: hidden file on an iso-image ?
On 25 Oct, Joerg Schilling wrote:
> Helmut Jarausch <jarausch@igpm.rwth-aachen.de> wrote:
>
>> I have an ISO image of 300 Mb which is said to contain software for
>> Linux and for Windows.
>> When I burn it onto a CD and mount it or when I mount it directly as
>> loop device,
>> I can only see the Linux part ( du -sm shows 144 Mb only).
>> When I look at it under Windows I can only see the Windows part.
>>
>> Is there any means to access everything under Linux?
>> And how can I create such an image?
>
> Do you expect help without giving enough information?
The problem is that I have only few information.
The image has been created by MapleSoft (Canada)
>
> You did not give any information about the image, so
> it is just not possible to help you - sorry.
>
> There are plenty of possibilities to let the size of the
> image file be > the size of the du output. One is a broken
> du utility or a broken kernel.
It's not just the du utility.
I have burnt the image to a CD with recent cdrecord and
there were no problems.
When I mount the CD under Linux (2.4.27) I see some files
(exactly those needed to install the software (Maple in this case)
under Linux)
But when I access the same CD under Win2000 I see totally
different files (excatly those one needs to install the software
under Windows)
So the image size is nearly the sum of the sum of filesizes
seen under Linux and Windows.
> Did you try isoinfo?
Yes, but it didn't help me, here is the
output:
isoinfo -debug -d -f -J -p -R -s -l -i maple9.51_su_win_mac_linux.iso
CD-ROM is in ISO 9660 format
System id: LINUX
Volume id: MAPLE95
Volume set id:
Publisher id:
Data preparer id:
Application id: MKISOFS ISO 9660/HFS FILESYSTEM BUILDER & CDRECORD CD-R/DVD CREATOR (C) 1993 E.YOUNGDALE (C) 1997 J.PEARSON/J.SCHILLING
Copyright File id:
Abstract File id:
Bibliographic File id:
Volume set size is: 1
Volume set sequence number is: 1
Logical block size is: 2048
Volume size is: 148416
Root directory extent: 28 size: 2048
Path table size is: 92
L Path table start: 20
L Path opt table start: 0
M Path table start: 22
M Path opt table start: 0
Creation Date: 2004 08 26 07:21:24.00
Modification Date: 2004 08 26 07:21:24.00
Expiration Date: 0000 00 00 00:00:00.00
Effective Date: 2004 08 26 07:21:24.00
File structure version: 1
Joliet escape sequence 0: '%' 1: '/' 2: 'E' 3: ''
Joliet escape sequence 0: '%' 1: '/' 2: 'E' 3: ''
Joliet with UCS level 3 found
Rock Ridge signatures version 1 found
I just wonder how one can create an image (probably with a dirty trick)
which looks like a correct iso image to Linux and Windows but with
totally different contents.
Sorry, I don't have more information.
Helmut.
--
Helmut Jarausch
Lehrstuhl fuer Numerische Mathematik
RWTH - Aachen University
D 52056 Aachen, Germany
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