Follow-up to the v0.7.4 dashboard triage: VCSA/ultravnc data ISOs are
*correctly* flagged non-bootable (no boot catalog exists to find), but
two real false-negative holes could mislabel genuinely bootable
appliance ISOs — both closed here.
iso_fs:
- Joliet fallback (the big one): lookup() now tries the primary
ISO9660 namespace first and falls back to the Joliet SVD (UCS-2
big-endian identifiers, escape-sequence detected). Windows-oriented
mastering tools — common for vendor/appliance ISOs — write a minimal
or mangled primary tree and keep the real filenames only in Joliet;
those images probed as "no installer files" and their in-ISO fetches
404'd. Applies everywhere the walker is used: introspection probes
(local + NFS/SFTP) and /iso/{id}/{*path} serving.
- find_descriptor(): the PVD/SVD search scans the whole descriptor
area (LBA 16..32), skipping non-CD001 filler sectors instead of
requiring a pristine sector 16.
- TestIsoBuilder grows a joliet_only mode (bare primary tree, real
names only in the SVD) modeling the mastering worst case.
introspect:
- detect_el_torito() no longer aborts at the first non-CD001 sector or
stops at a Set Terminator — sloppy mastering leaves zeroed filler
sectors that used to hide a real boot record and flag a bootable
image as a data ISO. All 16 descriptor sectors are examined; the
25-byte exact signature can't false-positive on what follows the set.
- Volume-label read now uses the same tolerant descriptor scan, and
label + El Torito + namespace probes all share one CachingReadAt, so
remote probes spend fewer round-trips than before despite scanning
more sectors.
- INTROSPECT_REV bumped to 3 so everything probed by the rev-2 logic
re-probes with the Joliet fallback: local ISOs on first startup, and
remote ISOs via the rev-gated cache self-invalidating.
webui:
- Unattended files: the same 5-per-page pager as Available images
(Showing X–Y of N · Prev/Next), composed with the existing filter,
page resets on input.
Validation: clippy pedantic clean, fmt clean, 319 workspace tests
green (+3: joliet fallback lookup, joliet-only classification, filler-
sector boot record), webui syntax-checked.
Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]>
