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xorriso: listing files+offsets in an ISO9660 image w/o RockRidge

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  xorriso: listing files+offsets in an ISO9660 image w/o RockRidge Jonathan Dowland <jmtd@debian.org> - 2016-11-09 12:30 +0100
    Re: xorriso: listing files+offsets in an ISO9660 image w/o RockRidge "Thomas Schmitt" <scdbackup@gmx.net> - 2016-11-09 14:10 +0100
      Re: xorriso: listing files+offsets in an ISO9660 image w/o RockRidge "Thomas Schmitt" <scdbackup@gmx.net> - 2016-11-09 14:40 +0100
        Re: xorriso: listing files+offsets in an ISO9660 image w/o RockRidge "Thomas Schmitt" <scdbackup@gmx.net> - 2016-11-09 15:20 +0100
        Re: xorriso: listing files+offsets in an ISO9660 image w/o RockRidge Jonathan Dowland <jmtd@debian.org> - 2016-11-10 12:40 +0100
      Re: xorriso: listing files+offsets in an ISO9660 image w/o RockRidge Jonathan Dowland <jmtd@debian.org> - 2016-11-10 12:40 +0100
        Re: xorriso: listing files+offsets in an ISO9660 image w/o RockRidge Jonathan Dowland <jmtd@debian.org> - 2016-11-10 13:00 +0100
          Re: xorriso: listing files+offsets in an ISO9660 image w/o RockRidge "Thomas Schmitt" <scdbackup@gmx.net> - 2016-11-10 13:30 +0100
            Re: xorriso: listing files+offsets in an ISO9660 image w/o RockRidge "Thomas Schmitt" <scdbackup@gmx.net> - 2016-11-10 15:10 +0100
          Re: xorriso: listing files+offsets in an ISO9660 image w/o RockRidge Jonathan Dowland <jmtd@debian.org> - 2016-11-10 17:40 +0100
            Re: xorriso: listing files+offsets in an ISO9660 image w/o RockRidge "Thomas Schmitt" <scdbackup@gmx.net> - 2016-11-10 19:50 +0100
              Re: xorriso: listing files+offsets in an ISO9660 image w/o RockRidge Jonathan Dowland <jmtd@debian.org> - 2016-11-11 22:20 +0100
              Re: xorriso: listing files+offsets in an ISO9660 image w/o RockRidge Jonathan Dowland <jmtd@debian.org> - 2016-11-18 16:40 +0100
              Re: xorriso: listing files+offsets in an ISO9660 image w/o RockRidge Jonathan Dowland <jmtd@debian.org> - 2016-11-18 16:40 +0100
                Re: orriso: listing files+offsets in an ISO9660 image w/o RockRidge "Thomas Schmitt" <scdbackup@gmx.net> - 2016-11-18 17:30 +0100
                  Re: orriso: listing files+offsets in an ISO9660 image w/o RockRidge Jonathan Dowland <jmtd@debian.org> - 2016-11-22 11:50 +0100
                    Re: xorriso: listing files+offsets in an ISO9660 image w/o RockRidge "Thomas Schmitt" <scdbackup@gmx.net> - 2016-11-22 21:50 +0100
                      Re: xorriso: listing files+offsets in an ISO9660 image w/o RockRidge Jonathan Dowland <jmtd@debian.org> - 2016-11-23 16:40 +0100
                  Re: orriso: listing files+offsets in an ISO9660 image w/o RockRidge Jonathan Dowland <jmtd@debian.org> - 2016-11-23 16:50 +0100
                    Re: xorriso: listing files+offsets in an ISO9660 image w/o RockRidge "Thomas Schmitt" <scdbackup@gmx.net> - 2016-11-23 17:00 +0100
                      Re: xorriso: listing files+offsets in an ISO9660 image w/o RockRidge "Thomas Schmitt" <scdbackup@gmx.net> - 2016-11-23 19:40 +0100
                    Re: orriso: listing files+offsets in an ISO9660 image w/o RockRidge Jonathan Dowland <jmtd@debian.org> - 2016-11-23 17:00 +0100
        Re: xorriso: listing files+offsets in an ISO9660 image w/o RockRidge "Thomas Schmitt" <scdbackup@gmx.net> - 2016-11-10 15:30 +0100
          Re: xorriso: listing files+offsets in an ISO9660 image w/o RockRidge Jonathan Dowland <jmtd@debian.org> - 2016-11-10 15:50 +0100
          Re: xorriso: listing files+offsets in an ISO9660 image w/o RockRidge Brian <ad44@cityscape.co.uk> - 2016-11-10 16:40 +0100
    Re: xorriso: listing files+offsets in an ISO9660 image w/o RockRidge Jonathan Dowland <jmtd@debian.org> - 2016-11-09 18:10 +0100

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#175037

Hi,

Jonathan Dowland sent me the URL of a test image which demonstrates
the problem with reading ISO 9660 images not produced on Linux.


Indeed the problem appears when reading the Rock Ridge info of the
root directory. So xorriso-1.4.6 in Debian testing cannot avoid it.

The root directory record is at block 259. Its length is 40 bytes of
which 34 are occupied by ISO 9660 directory data. So 6 bytes stay free
for potential SUSP data. All 6 bytes are 0. So it is no SUSP.

Here libisofs makes a mistake:
When checking for the SUSP entry "SP" it accepts 0 potential SUSP bytes
or a SUSP-compliant entry. The case of non-SUSP extra bytes is not covered
and triggers the error message.

libisofs should have disabled Rock Ridge reading automatically rather than
bailing out.

I will now develop a remedy and use your ISO to test it.
Then i'll ask Jonathan to check it on xihis collection.


Have a nice day :)

Thomas

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#175034 — Re: orriso: listing files+offsets in an ISO9660 image w/o RockRidge

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On Wed, Nov 23, 2016 at 03:40:22PM +0000, Jonathan Dowland wrote:
> But digging into this a little, it seems to be an argument order issue.

...and all of my ISOs now read fine without the RR warnings. I haven't double-checked
the docs, if you state that the argument order of -read_fs / -indev is important, then
this is just pilot error after all :-)


-- 
Jonathan Dowland
Please do not CC me, I am subscribed to the list.

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#174468

Hi,

two hours ago, i sent the mail below as reply to
  https://lists.debian.org/debian-user/2016/11/msg00355.html
Subject line was:
  LDO_SUBSCRIBER, was Re: xorriso: listing files+offsets in an ISO9660 image w/o RockRidge
Date: Thu, 10 Nov 2016 12:59:10 +0100

But it did not arrive in my mailbox and does not show up in the archive.

So another try. This time with the thread's original subject line.

--------------------------------------------------------------------

Jonathan Dowland wrote:
> I've never heard of LDO_SUBSCRIBER, but I am subscribed 

My mails (and those of most other regular posters) have it in their
X-Spam-Status when they arrive in my mailbox something like:

  X-Spam-Status: No, score=-16.9 required=4.0 tests=FOURLA,FREEMAIL_FROM,
      FVGT_m_MULTI_ODD,LDOSUBSCRIBER,LDO_WHITELIST,RCVD_IN_DNSWL_LOW,
      RCVD_IN_MSPIKE_H2,RCVD_IN_SORBS_SPAM,
      RP_MATCHES_RCVD autolearn=unavailable
      autolearn_force=no version=3.4.0

The word "LDOSUBSCRIBER" seems to be the indication for a sunscribed
sender.

The headers in mails from you look like:

  X-Spam-Status: No, score=-10.0 required=4.0
      tests=HEADER_FROM_DIFFERENT_DOMAINS,LDO_WHITELIST,PGPSIGNATURE,
      RCVD_IN_DNSWL_NONE autolearn=unavailable autolearn_force=no
      version=3.4.0

My best theory for now is that your @debian.org sender address is processed
differently from other @domain addresses.


> (I put something like that in my signature to make things clear, but
> I guess most people don't get that far)

At least not when technical eagerness has taken over. :))


Have a nice day :)

Thomas

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#174472

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On Thu, Nov 10, 2016 at 03:21:42PM +0100, Thomas Schmitt wrote:
> My mails (and those of most other regular posters) have it in their
> X-Spam-Status when they arrive in my mailbox something like:
...
> The word "LDOSUBSCRIBER" seems to be the indication for a sunscribed
> sender.
...
> My best theory for now is that your @debian.org sender address is processed
> differently from other @domain addresses.

Ah yes, I see. @debian.org is forward-only: it forwards to a private address
of mine, from which I send, although the From: is set to @debian.org (you can
see the semi-private address in my Envelope-From). I'm going to hazard a guess
that the list server's spamassassin is marking mails as LDOSUBSCRIBER if the
envelope-from (rather than From: header) matches an address that is known to be
subscribed (which my semi-private address is not).

-- 
Jonathan Dowland
Please do not CC me, I am subscribed to the list.

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#174476

On Thu 10 Nov 2016 at 15:21:42 +0100, Thomas Schmitt wrote:

> Hi,
> 
> two hours ago, i sent the mail below as reply to
>   https://lists.debian.org/debian-user/2016/11/msg00355.html
> Subject line was:
>   LDO_SUBSCRIBER, was Re: xorriso: listing files+offsets in an ISO9660 image w/o RockRidge
> Date: Thu, 10 Nov 2016 12:59:10 +0100
> 
> But it did not arrive in my mailbox and does not show up in the archive.

It didn't arive here either.

> So another try. This time with the thread's original subject line.
> 
> --------------------------------------------------------------------
> 
> Jonathan Dowland wrote:
> > I've never heard of LDO_SUBSCRIBER, but I am subscribed 
> 
> My mails (and those of most other regular posters) have it in their
> X-Spam-Status when they arrive in my mailbox something like:
> 
>   X-Spam-Status: No, score=-16.9 required=4.0 tests=FOURLA,FREEMAIL_FROM,
>       FVGT_m_MULTI_ODD,LDOSUBSCRIBER,LDO_WHITELIST,RCVD_IN_DNSWL_LOW,
>       RCVD_IN_MSPIKE_H2,RCVD_IN_SORBS_SPAM,
>       RP_MATCHES_RCVD autolearn=unavailable
>       autolearn_force=no version=3.4.0
> 
> The word "LDOSUBSCRIBER" seems to be the indication for a sunscribed
> sender.

A reasonable assumption. However, a lack of LDOSUBSCRIBER tells you
nothing about whether the sender is a subscriber to the list or not.

-- 
Brian.

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#174431

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Partially answering my own question, "iso-info" from the libcdio-utils
package prints out the Logical Sector Number for files which is probably
what I need, at least it can be translated into the Logical Block Address,
I just need to figure out mapping the numbers from ddrescue's log files
into that space (offset for TOC etc.)

-- 
Jonathan Dowland
Please do not CC me, I am subscribed to the list.

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