Re: UDF: buggy? libdvdread vs. udf fs driver

[Herbert Rosmanith <kernel@wildsau.enemy.org>]

>     > UDFScanDir (1) Dir.Length=92 (2) FileName=VIDEO_TS
>       UDFScanDir:595
>       enter while: Dir.Length=92
>       TagID=257 101
>       filename=
>       TagID=257 101
>       filename=lost+found
>     X UDFScanDir:638
> 
>     what? it still stops after "lost+found", which just has been removed?

okidok ... having seen this, I had the idea of modyfing mkudffs just
to see what's going to happen.

since "lost+found" is so persistent and remains allthough having been removed
before, I changed "udftools-1.0.0b3/mkudffs/mkudffs.c" not to create
"lost+found", but "VIDEO_TS" instead:

   642          //desc = udf_mkdir(disc, pspace, "\x08" "lost+found", 11, offset+1, desc);
   643          desc = udf_mkdir(disc, pspace, "\x08" "VIDEO_TS", 9, offset+1, desc);

good.

now:
    bash-2.05# mkudffs --vid="The Entropy Movie" --udfrev=0x0102 --ad=short --noefe 24M
    start=0, blocks=16, type=RESERVED 
    start=16, blocks=3, type=VRS 
    start=19, blocks=237, type=USPACE 
    start=256, blocks=1, type=ANCHOR 
    start=257, blocks=16, type=PVDS 
    start=273, blocks=1, type=LVID 
    start=274, blocks=11757, type=PSPACE 
    start=12031, blocks=1, type=ANCHOR 
    start=12032, blocks=239, type=USPACE 
    start=12271, blocks=16, type=RVDS 
    start=12287, blocks=1, type=ANCHOR 
    bash-2.05# mount -o loop 24M /mnt
    bash-2.05# find /mnt
    /mnt
    /mnt/VIDEO_TS

good, that's what I wanted. now create dvd:

    bash-2.05# dvdauthor -o /mnt -x foo.xml 
    DVDAuthor::dvdauthor, version 0.6.11.
    Build options: gnugetopt freetype
    Send bugs to <dvdauthor-users@lists.sourceforge.net>
    
    INFO: dvdauthor creating VTS
    STAT: Picking VTS 01
    STAT: Processing foo.mpg...
    ...
    INFO: dvdauthor creating table of contents
    INFO: Scanning /mnt/VIDEO_TS/VTS_01_0.IFO

all files in place?
    bash-2.05# find /mnt
    /mnt
    /mnt/VIDEO_TS
    /mnt/VIDEO_TS/VTS_01_1.VOB
    /mnt/VIDEO_TS/VTS_01_0.IFO
    /mnt/VIDEO_TS/VTS_01_0.BUP
    /mnt/VIDEO_TS/VIDEO_TS.IFO
    /mnt/VIDEO_TS/VIDEO_TS.BUP
    /mnt/AUDIO_TS

indeed.

now for libdvdread:
    bash-2.05# umount /mnt
    bash-2.05# ogle 24M 
    libdvdread: Using libdvdcss version 1.2.9 for DVD access
    > UDFFindFile filename=/VIDEO_TS/VIDEO_TS.IFO
      UDFFindFile:856
    > UDFMapICB
    > UDFFileEntry
      ad->Length=0
      L_EA=0 L_AD=8
      before switch: ad->Length=0
      flags=0000
      flags=>UDFShortAD
      after switch: ad->Length=88
    < UDFFileEntry, ad->Length=88
    < UDFMapICB:530, return 1(ok)
      887: File.length=88 token=VIDEO_TS
    > UDFScanDir (1) Dir.Length=88 (2) FileName=VIDEO_TS
      UDFScanDir:595
      enter while: Dir.Length=88
      TagID=257 101
      filename=
      TagID=257 101
      filename=VIDEO_TS
      ^^^^^^^^^^^^^^^^^

libdvdread now finds VIDEO_TS, which it failed to before.

but:

    > UDFMapICB
    > UDFFileEntry
      ad->Length=0
      L_EA=0 L_AD=8
      before switch: ad->Length=0
      flags=0000
      flags=>UDFShortAD
      after switch: ad->Length=40
    < UDFFileEntry, ad->Length=40
    < UDFMapICB:530, return 1(ok)
      887: File.length=40 token=VIDEO_TS.IFO
    > UDFScanDir (1) Dir.Length=40 (2) FileName=VIDEO_TS.IFO
      UDFScanDir:595
      enter while: Dir.Length=40
      TagID=257 101
      filename=
    > UDFMapICB
    < UDFMapICB:514, return 1(ok)
    X UDFScanDir:638

 ... it fails to find "VIDEO_TS.IFO", allthough:

    bash-2.05# mount -o loop 24M /mnt
    bash-2.05# ls -l /mnt/VIDEO_TS/VIDEO_TS.IFO 
    -rw-r--r--   1 root     root         6144 Jun  5 19:33 /mnt/VIDEO_TS/VIDEO_TS.IFO

... the udf-fs driver _does_ see that file.

kind regards,
h.rosmanith