SUMMARY *** NOTE: If you are reporting a crash, please try to attach a backtrace with debug symbols. See https://community.kde.org/Guidelines_and_HOWTOs/Debugging/How_to_create_useful_crash_reports *** STEPS TO REPRODUCE 1. Download ISO from here: https://archive.org/details/Power-Drive-DOS-1994 2. Try to open ISO with Ark 3. OBSERVED RESULT Ark says "The archive you're trying to open is corrupt." Even if you tell it to open read-only, it doesn't show anything. EXPECTED RESULT This is a valid ISO that should be capable of being opened normally. SOFTWARE/OS VERSIONS Linux/KDE Plasma: KDE Neon 5.23 (available in About System) KDE Plasma Version: 5.23.3 KDE Frameworks Version: 5.88 Qt Version: 5.15.3 ADDITIONAL INFORMATION The blog post here: https://multimedia.cx/eggs/iso-9660-compromise-part-2-finding-root/ actually diagnoses the problem, and figures out why some software fails on loading the ISO, and others don't. The actual files are also available as a ZIP file in the download link above. You can successfully mount the ISO using the right click menu option in KDE "Mount ISO". Here's the file listing I got using that option: ls -la total 705 dr-x------ 1 steve steve 2048 Nov 21 1994 . drwxr-x---+ 3 root root 4096 Dec 9 18:54 .. -r-------- 1 steve steve 14 Nov 8 1991 batch1.bat -r-------- 1 steve steve 148 Nov 8 1991 batch2.bat dr-x------ 1 steve steve 2048 Nov 2 1994 cd -r-------- 1 steve steve 10080 Dec 22 1993 emuset.exe dr-x------ 1 steve steve 2048 Nov 8 1991 g -r-------- 1 steve steve 19128 Nov 2 1994 install.exe -r-------- 1 steve steve 92571 Dec 22 1993 megaem.exe -r-------- 1 steve steve 44 Nov 1 1991 pd.bat -r-------- 1 steve steve 566031 Nov 21 1991 pdrive.exe dr-x------ 1 steve steve 2048 Nov 17 1994 s -r-------- 1 steve steve 19128 Nov 2 1994 sound.exe Mounting as a loop device also works: sudo mount -t iso9660 -o loop ~/Downloads/Power-Drive.iso ~/games/iso
I am wondering whether this is upstream's (libarchive / bsdtar) problem... The author (Mike) of the blog post [1] reported an issue regarding ISO in libarchive in the past [2]. Although the issue ([2]) is not the same as this one (libarchive reports "Invalid length of directory record" for Power-Drive.iso), maybe he has some ideas about ISO support in libarchive. Perhaps you can try contacting Mike (and maybe also open an issue in libarchive repo and "@" (mention) Mike)? [1] https://multimedia.cx/eggs/iso-9660-compromise-part-2-finding-root/ [2] https://github.com/libarchive/libarchive/issues/954
Yep, looks like https://github.com/libarchive/libarchive/issues/954.
(In reply to Nate Graham from comment #2) > Yep, looks like https://github.com/libarchive/libarchive/issues/954. I tried the patch in that issue (multimediamike@abb59bd) but it does not solve the problem for the file Power-Drive.iso. Also, that issue is opened several years ago (2017), while Mike's "ISO-9660 Compromise, Part 2: Finding Root" is posted in October 2021: > I recently discovered another bit of compromise in the ISO-9660 spec So I guess this may be a different issue. But anyway I agree that this issue should probably be forwarded to upstream (libarchive).