Listed file names truncated to 64 characters on iso file
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#1055 Listed file names truncated to 64 characters on iso file
The file in question is http://releases.ubuntu.com/9.04/ubuntu-9.04-alternate-amd64.iso
The 7-zip versions I have encountered this bug in are both 4.65 and 9.10 (beta), Windows 32-bit.
The displayed filenames when running "7z l", as well as in the 7-zip file explorer are truncated to the first 64 characters in the filename.
Examples (these should all end in .udeb, but are listed as follows)
pool\main\l\linux\firewire-core-modules-2.6.28-11-generic-di_2.6.28-11.42_amd64.ud
pool\main\l\linux\fs-secondary-modules-2.6.28-11-generic-di_2.6.28-11.42_amd64.ude
pool\main\l\linux\pcmcia-storage-modules-2.6.28-11-generic-di_2.6.28-11.42_amd64.u
The issue is with filename length, not path length, since long paths with a filename of length less than 64 like pool\main\l\linux-backports-modules-2.6.28\updates-modules-2.6.28-11-generic-di_2.6.28-11.12_amd64.udeb are correctly listed.
Output of 7z l ubuntu-9.04-alternate-amd64.iso for 7-zip 4.65
Also, I believe that the iso file in question uses the rockridge extension to iso9660. If 7-zip doesn't support rockridge, then that would likely be the cause of this issue.
WinRar also shows such names.
What program you can see long names for these files?
Loopmounting the iso file in Linux (mount -o loop), or burning it to CD using cdrtools on Linux provide the correct file names. On Windows, MagicISO (5.5 trial) was able to correctly able to display the long file names.
7-zip uses Joliet (file system) version of names.
http://en.wikipedia.org/wiki/Joliet_%28file_system%29
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Joliet accomplishes this by supplying an additional set of filenames to be encoded in UCS-2. These filenames are stored in a special supplementary header that is safely ignored by ISO 9660-compliant software, thus preserving backward compatibility.
The specification only allows filenames to be up to 64 Unicode characters in length. However, filenames up to 103 characters in length do not appear to cause any problems.
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I don't see simple solution now. Joliet is good. Maybe it will be difficult to modify 7-zip code to support both names (ISO name long names and Joliet names).
file-roller can also read it.
file-roller - archive manager for GNOME
OK, this problem drove me crazy for days. Any updates? Is there a reliable way to extract an ISO image with 7z?
I am still seeing this issue. Is it supposed to be fixed?