Package: debian-cd Followup-For: Bug #1031696 > >Thinking aloud: as an alternative, would adding the '-f' flag to MKISOFS > >achieve the desired result for both documentation and firmware files, without > >requiring any other changes?
> No, then I expect we'll simply end up with duplicate copies of the > files. I was worried about that too, but I think that with '-f', each resulting file is only stored once within the resulting ISO image, so no additional storage space (beyond the additional file record references) is required. Testing, although maybe not proving, the idea: here's creation of a 1MB file, then creation of a symlink to it, and an ISO image -- that is less than 2MB -- containing both by using the '-f' flag to store symlinked files using shared disc-blocks instead of links: $ dd if=/dev/zero of=one.dat bs=1M count=1 1+0 records in 1+0 records out 1048576 bytes (1.0 MB, 1.0 MiB) copied, 0.00553131 s, 190 MB/s $ ln -s one.dat two.dat $ xorriso -as mkisofs -f -o combined.iso one.dat two.dat xorriso 1.5.4 : RockRidge filesystem manipulator, libburnia project. Drive current: -outdev 'stdio:combined.iso' Media current: stdio file, overwriteable Media status : is blank Media summary: 0 sessions, 0 data blocks, 0 data, 250g free Added to ISO image: file '/one.dat'='/home/jka/Downloads/one.dat' xorriso : UPDATE : 1 files added in 1 seconds Added to ISO image: file '/two.dat'='/home/jka/Downloads/two.dat' xorriso : UPDATE : 2 files added in 1 seconds ISO image produced: 695 sectors Written to medium : 695 sectors at LBA 0 Writing to 'stdio:combined.iso' completed successfully. $ ls -lsh combined.iso 1.4M -rw-r--r-- 1 jka jka 1.4M Mar 12 18:08 combined.iso $ xorriso -indev combined.iso -find / -type f -exec report_lba xorriso 1.5.4 : RockRidge filesystem manipulator, libburnia project. xorriso : NOTE : Loading ISO image tree from LBA 0 xorriso : UPDATE : 2 nodes read in 1 seconds Drive current: -indev 'combined.iso' Media current: stdio file, overwriteable Media status : is written , is appendable Media summary: 1 session, 695 data blocks, 1390k data, 250g free Volume id : 'ISOIMAGE' Report layout: xt , Startlba , Blocks , Filesize , ISO image path File data lba: 0 , 33 , 512 , 1048576 , '/one.dat' File data lba: 0 , 33 , 512 , 1048576 , '/two.dat'