[Libcdio-devel] libcdio treats a >4GB ISO-9660 file as 2 separate parts

[Pete Batard]

Hi,

This is another issue that got reported by users of my libcdio-based 
application Rufus: When trying to process the latest BlackArch ISO [1] 
(An ISO-9660 image from an Arch Linux derivative), the file 
'blackarch/x86_64/airootfs.sfs' appears to seen by libcio as 2 separate 
files with the exact same name, split around the 4GB mark.

For instance, this is what the isolist sample reports when compiled and 
run on Linux x64 (Debian 9), with line 97 changed to: `p_entlist = 
iso9660_ifs_readdir (p_iso, "blackarch/x86_64");` in order to list the 
relevant subdirectory:

----------------------------------------------------------------------
address@hidden /usr/src/libcdio/example # ./isolist 
blackarchlinux-live-2017.06.14-x86_64.iso
Application: ARCH LINUX LIVE/RESCUE CD
Preparer   : PREPARED BY MKARCHISO
Publisher  : ARCH LINUX <HTTP://WWW.ARCHLINUX.ORG>
Volume     : BLACKARCH_201706
d [LSN     30]     2048 /.
d [LSN     21]     2048 /..
- [LSN  55927]       47 /airootfs.md5
- [LSN  55928] 4294965248 /airootfs.sfs
- [LSN 2153079] 3160266752 /airootfs.sfs
----------------------------------------------------------------------

Of course, large file support wasn't disabled when libcdio was 
configured, so I don't believe this has anything with LFS.
I also tested on Windows x64, through MinG32, and got the same results.

For the record, an application like 7-zip, that can open ISO-9660 
images, does see airootfs.sfs as a single large file.

Since I suspect that this is a libcdio bug, I am reporting this issue so 
that I can be investigated and addressed, as I don't think I'll have a 
chance to do so myself in the near future.

You can download the problematic ISO (7.1 GB) by using the link below.

Regards,

/Pete

[1] 
http://ftp.halifax.rwth-aachen.de/blackarch/iso/blackarchlinux-live-2017.06.14-x86_64.iso 
(You can also find a torrent for that image at 
https://blackarch.org/downloads.html#iso-download)