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Re: Extracting directories from an ISO image, command line tool?

Thomas Schmitt wrote:

Hi,

Richard Owlett wrote:

xorriso -osirrox on:auto_chmod_on -overwrite nondir -indev /media/richard/Lexar/dvd8_2.iso  -extract /pool /media/richard/REPO8/test/pool
...
libisoburn: WARNING : ISO image size 2284052s larger than readable size 1941504s


Looks like the file dvd8_2.iso is truncated.
The Primary Volume Descriptor (superblock) says the ISO has
2284052 * 2048 = 4,677,738,496 bytes, whereas libburn sees
a pseudo-drive of 1941504 * 2048 = 3,976,200,192 bytes.
It gets this size info from system function stat(2).

Check independently of xorriso by

  ls -l /media/richard/Lexar/dvd8_2.iso
  /sbin/isosize /media/richard/Lexar/dvd8_2.iso

Ask xorriso for more info by

  xorriso -indev /media/richard/Lexar/dvd8_2.iso -toc

2284052 blocks is a plausible size for a DVD image. Max size
for DVD+RW is 2295104 blocks. So probably the file lost 700 MB
during some transfer.




I'm seeing a pattern ;/
I've got some links "somewhere" for copying DVDs to files such that checksums can be verified. Suspect that info may useful. 


richard@jessie:~$  ls -l /media/richard/Lexar/dvd8_2.iso
-rw-r--r-- 1 richard richard 3976200192 Sep 9 07:36 /media/richard/Lexar/dvd8_2.iso 

richard@jessie:~$  /sbin/isosize /media/richard/Lexar/dvd8_2.iso
4677738496
richard@jessie:~$ xorriso -indev /media/richard/Lexar/dvd8_2.iso -toc 
xorriso 1.3.2 : RockRidge filesystem manipulator, libburnia project.
libisoburn: WARNING : ISO image size 2284052s larger than readable size 1941504s 
xorriso : NOTE : Loading ISO image tree from LBA 0
xorriso : UPDATE : 6023 nodes read in 1 seconds
Drive current: -indev '/media/richard/Lexar/dvd8_2.iso'
Media current: stdio file, overwriteable
Media status : is written , is appendable
Media summary: 1 session, 1941504 data blocks, 3792m data, 11.0g free
Volume id    : 'Debian 8.0.0 i386 2'
Drive current: -indev '/media/richard/Lexar/dvd8_2.iso'
Drive type   : vendor 'YOYODYNE' product 'WARP DRIVE' revision 'FX01'
Media current: stdio file, overwriteable
Media status : is written , is appendable
Media blocks : 1941504 readable , 5780880 writable , 8064944 overall
TOC layout   : Idx ,  sbsector ,       Size , Volume Id
xorriso : WARNING : Session 1 bears ISO image size 2284052s larger than track size 1941504s 
ISO session  :   1 ,         0 ,   1941504s , Debian 8.0.0 i386 2
Media summary: 1 session, 1941504 data blocks, 3792m data, 11.0g free
Media nwa    : 2284064s
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