https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=285027
Bug ID: 285027
Summary: makefs: cd9660 images w/ RockRidge extensions are not
reproducible
Product: Base System
Version: CURRENT
Hardware: Any
OS: Any
Status: New
Keywords: reproducible-builds
Severity: Affects Only Me
Priority: ---
Component: bin
Assignee: b...@freebsd.org
Reporter: ema...@freebsd.org
makefs' cd9660 Rock Ridge extension PX record stores the inode from the
underlying filesystem, which makes the created ISO image nonreproducible.
Demonstration:
dir=$(mktemp -d)
# Create two files
touch $dir/a
touch $dir/b
makefs -t cd9660 -o R -o l=2 t1.iso $dir
# Copy the files so we have different inodes, and move copies to original names
cp -p $dir/a $dir/c
cp -p $dir/b $dir/d
mv $dir/c $dir/a
mv $dir/d $dir/b
makefs -t cd9660 -o R -o l=2 t2.iso $dir
rm -rf $dir
Diffoscope output:
--- t1.iso
+++ t2.iso
├── isoinfo -l -i {} -R
│┄ error from `isoinfo -l -i {} -R`:
│┄ Setting input-charset to 'UTF-8' from locale.
│ @@ -1,6 +1,6 @@
│
│ Directory listing of /
│ 9332 drwx------ 2 1001 0 2048 Feb 25 2025 [ 20 02] .
│ 9332 drwx------ 2 1001 0 2048 Feb 25 2025 [ 20 02] ..
│ - 9991 -rw-r--r-- 1 1001 0 0 Feb 25 2025 [ 21 00] a
│ - 9992 -rw-r--r-- 1 1001 0 0 Feb 25 2025 [ 21 00] b
│ + 9951 -rw-r--r-- 1 1001 0 0 Feb 25 2025 [ 21 00] a
│ + 9458 -rw-r--r-- 1 1001 0 0 Feb 25 2025 [ 21 00] b
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