Re: editable udf metadata

[Pat LaVarre <p.lavarre@ieee.org>]

> We mean to say udfct in Linux needs no SCSI pass thru, right?
> We mean to say udfct only needs a raw block device?
> Mac OS X has those too, so Mac OS X could work if we volunteer a patch?

No explicit answers yet.

But here now in summary we do have four UDF FAQ's answered, per request
kindly received offline:

/// Contents

1: Where on the web does the fsck for linux udf.ko appear?
2: Why does an erased disk fail udf fsck?
3: Where on the web does an already `make`able udf fsck appear?
4: Why doesn't udfct_1_0r2/ understand `./configure ; make`?

/// 1: Where on the web does the fsck for linux udf.ko appear?

As the udffsck/ of:

$ export CVSROOT=:pserver:anonymous@cvs.sourceforge.net:/cvsroot/linux-udf
$ cvs login
(Logging in to anonymous@cvs.sourceforge.net)
CVS password:
$ cvs co udftools
...

/// 2: Why does an erased disk fail udf fsck?

It doesn't, if you erased your disk correctly.

The one "error:|warning:|note:" you can expect is "EFE  28  icbtag
error: parentICBLocation: (10,0)," if you erased your disk via the
mkudffs/mkudffs of 2002 Feb 9 1.0.0b2 udftools freely offered as the
"latest file release" of:
http://sourceforge.net/projects/linux-udf/

If you want no "error:|warning:|note:", then instead you can try the
mkudffs/mkudffs you get via CVS.

/// 3: Where on the web does an already `make`able udf fsck appear?

We haven't yet published how to make the cvs udf fsck.

At the end of the web trail:

http://www.google.com/search?q=philips+udf+test
http://www.google.com/search?q=philips+udf+verifier&btnI=1
http://www.extra.research.philips.com/udf/
http://www.extra.research.philips.com/udf/download.html
http://www.extra.research.philips.com/udf/download/udfct_1_0r2.tar.gz

The src/udf_tester/udf_test you make is the "Philips UDF Verifier" of
Gerrit Scholls et al.

/// 4: Why doesn't udfct_1_0r2/ understand `./configure ; make`?

I have no idea.  But a tty log of what worked for me follows:

$ cd udfct_1.0r2
$ less FAQ.txt
$ cd src/udf_tester
$ make
...
$
$ ./udf_test /dev/sg0
UDF Conformance Testing Application
(c) Koninklijke Philips Electronics N.V. 1999-2003
Application version: 1.0r2
UCT Core version   : 1.0r2
...
No image configuration file /dev/sg0.cfg 
 
  Error: Image file chunk byte size: 0,
-        expected: not zero, at most (1048575 * 2048), and
-        an integral multiple of the block size (2048).
-   for: /dev/sg0
 
Cannot create image device
...
fatal error: Exit code 2, quit.
...
$
$ ./udf_test -show-scsi
...
Unknown, misplaced or unused command line arguments:
        -show-scsi
fatal error: Exit code 2, quit.
...
$
$ sudo dd of=/dev/scd0 bs=2K count=1 if=/dev/zero
1+0 records in
1+0 records out
$
$ mkudffs /dev/scd0
trying to change type of multiple extents
$
$ sudo mkudffs /dev/scd0
start=0, blocks=16, type=RESERVED
...
start=524287, blocks=1, type=ANCHOR
$
$ sudo udf_test /dev/scd0 >1
$ sudo udf_test /dev/scd0 >2
$ diff 1 2
50c50
<       Start time   : 2003-10-21 17:14:31 -06:00 (west of UTC)
---
>       Start time   : 2003-10-21 17:14:33 -06:00 (west of UTC)
$
$ grep -i 'note:' 1 | wc -l
      0
$ grep -i 'warning:' 1 | wc -l
      0
$ grep -i 'error:' 1 | wc -l
      1
$
$ grep -i -A 6 'error:' 1
        EFE  28  icbtag error: parentICBLocation: (34,0),
-                       recommended: (0,0) for strategy type 4.
-                Icbtag Parent ICB Location shall not point to itself
-                or to a higher parent in the directory hierarchy.
-                ECMA 3rd edition 4/8.10.1, 4/14.6.7, UDF 2.3.5.3.
-                icbtag: ECMA 4/14.6.*, 4/A.5, UDF 2.3.5.*, 6.6
-                name: "lost+found"
$