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[Bug-xorriso] Patching bootable multisession images

From: Dan Fandrich
Subject: [Bug-xorriso] Patching bootable multisession images
Date: Thu, 24 Feb 2011 19:33:24 -0800
User-agent: Mutt/1.5.21 (2010-09-15)

I'm trying to get xorriso to rewrite an ISO image onto a new session of a
multisession disk and make it bootable, without success. The idea is to 
reuse a multisession CD by dropping all the contents in the old sessions
and writing a new session containing the ISO image contents. This entails
modifying the various block offsets in the ISO image to account for the fact
that it will be stored at a location starting other than 0.

The command-line I've come up with is this:

  xorriso -indev "$1" -load sbsector 0 -chmod 0444 /isolinux/af.hlp -- \
     -outdev /dev/sr0 -boot_image isolinux patch -boot_image any show_status \
     -grow_blindly 12846 -commit

but I get the error message:

 xorriso : FAILURE : -indev differs from -outdev and -outdev media is not blank

which is true, but IMHO, irrelevant.  NB, the -chmod command is just there
to force xorriso to attempt to patch up the image.

Is it possible to make xorriso do what I want?  If so, how? Thanks in advance.

>>> Dan

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