erofs-freebsd-out-tree/tests/TC039-symlink-long.md

Test Case: Long Symlink Target

Test ID: TC039-symlink-long

Objective

Verify a greater-than-60-byte EROFS symlink target is returned completely and follows correctly.

Fixture

Use images/flat.erofs, source/flat/longlink, and its nested target file. Structured evidence records symlink size 73 and actual layout 2. EROFS does not switch to a separate-data-block symlink merely at 60 bytes; that former fixture assumption is invalid.

Procedure

test -L "$mnt/longlink"
readlink /tmp/repo22-g1/source/flat/longlink > /tmp/tc039-source-target
readlink "$mnt/longlink" > /tmp/tc039-mount-target
cmp /tmp/tc039-source-target /tmp/tc039-mount-target
test "$(wc -c < /tmp/tc039-mount-target)" -eq 74
cmp /tmp/repo22-g1/source/flat/very/long/path/to/a/deeply/nested/deterministic/target/directory/file.txt \
  "$mnt/longlink"
sha256 "$mnt/longlink" \
  /tmp/repo22-g1/source/flat/very/long/path/to/a/deeply/nested/deterministic/target/directory/file.txt

The wc count is 73 target bytes plus the output newline.

Expected Results

• Source and mounted targets match exactly and exceed 60 bytes.
• The link follows to source-exact data with no truncation; cleanup succeeds.