[ILUG] Alternative filesystems on a DVD

[Brian Foster]

  | Date: Mon, 21 Aug 2006 15:27:49 +0000 (GMT)
  | From: Malcolm Tyrrell <malcoh0l at yahoo.ie>
  |[ ... ]
  | >   mkisofs -o image.iso -R ../Temp   would work
  | 
  | It does!
  | 
  | But what if there is no overarching directory?  In my case I
  | want to backup three partitions, but I certainly don't want to
  | backup /.
  | 
  | A quick fix (which seems to work for my system) is to create
  | a little directory of symbolic links to the partitions I want,
  | and tell mkisofs to follow links.  But what if the partitions
  | themselves contained links that pointed all over the shop?

 this is where `--graft-point' is very possibly yer
 friend:

    mkisofs -R -o image -graft-points -- path_in_ISO/=path_on_HDD

 note the trailing `/' in the magic  dir/=dir  argument;
 AFAICR, it matters (at least when using the trick
 described below?)!  the  path_in_ISO/  should not start
 with `/';  nominally,  path_on_HDD  does.  and usefully,
 you can have multiple such arguments.

 mkisofs(1) creates any dirs in the ISO necessary to
 make  path_in_ISO/  valid.  the _problem_ (for me) with
 the above is the mode/owner/group of those dirs is both
 rubbish and uniform (identical).  that may or may not
 be Ok for you, but since it vastly annoyed me ....

 .... I found a simple hack to work-around the problem:
 I also create a little directory (as mentioned above),
 not of symlinks, but of the directories named as they
 are to appear in the ISO (i.e.,  path_in_ISO/  names).
 I set the mode/owner/group of each directory to what
 I want, and then:

    cd the_little_dir
    mkisofs -R -o ../image -graft-points -- . path_in_ISO/=path_on_HDD

 that is, `.' (the_little_dir) is first in the list of
 things to put into the ISO, followed by the magical
 path_in_ISO/=path_on_HDD  argument(s).  end result is
 `mkisofs' creates the needed dirs as per my precise
 specifications, and then uses them as per the graft
 magic without creating any dirs on its own.

cheers!
	-blf-
-- 
Experienced (20+ yrs) kernel/software Eng: | Brian Foster   Montpellier,
 • Unix, embedded, &tc;  • Linux;  • doc;  | blf at utvinternet.ie   FRANCE
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