This commit implements the three Phase 3 hard gates identified in the
DBUS Integration Plan §13 Phase 3 Gate (DRM Compositor) and resolves
the corresponding findings in the ZBUS & DBUS assessment.
* dbus recipe: wire dbus-root-uid.patch into the patches array
(local/recipes/system/dbus/recipe.toml:9-12). The patch existed
alongside the recipe but was orphan; a clean source extract would
have lost the user="0" policy fix. The patch is now applied to
the tarball before build.
* zbus 5.14.0 -> 5.18.0 (local/recipes/libs/zbus/source/Cargo.toml:3).
The eight consumer recipes' version = "5" constraint already
permits 5.18.0; the local fork now declares the latest upstream
version.
* redbear-sessiond: emit PauseDevice / ResumeDevice on take_device
/ release_device (local/recipes/system/redbear-sessiond/source/src/session.rs).
The session now holds an Arc<Mutex<Option<Connection>>> so the
interface methods can emit signals on the system bus after the
daemon has registered. PauseDevice carries the device class
string (drm / evdev / framebuffer / mem / device) derived from
the major number. ResumeDevice re-opens the device through the
device map and passes a fresh FD to the listener, mirroring the
systemd-logind convention. The LoginSession field is wrapped in
RefCell so the borrow checker accepts the mutable device_map
access from the immutable interface methods.
* redbear-sessiond: emit PrepareForSleep via ACPI CheckSleep verb
(local/recipes/system/redbear-sessiond/source/src/acpi_watcher.rs).
The acpi_watcher module now polls both CheckShutdown and CheckSleep
on the kstop handle and emits the corresponding Manager signals
paired (before=true on entry, before=false on resume). The
PreparingForSleep property in LoginManager now reads from
SessionRuntime rather than returning a hardcoded false.
* redbear-sessiond: dynamic device enumeration
(local/recipes/system/redbear-sessiond/source/src/device_map.rs).
The hardcoded (major, minor) -> path table is gone. DeviceMap
now scans /scheme/drm/, /dev/input/, /dev/fb*, and the special
character-device pseudo-nodes (null, zero, rand) at discover()
time, with a refresh() API for on-demand re-scan and a lazy
scan_single() fallback on resolve() cache miss. A 5-second
refresh interval is the default. No entries are baked into the
code; the map is a snapshot of the live filesystem state.
* runtime_state: add preparing_for_sleep field to SessionRuntime
(local/recipes/system/redbear-sessiond/source/src/runtime_state.rs).
Required for the new ACPI sleep watcher to record state.
* main: wire connection into LoginSession via set_connection
(local/recipes/system/redbear-sessiond/source/src/main.rs). Called
after the zbus object server builds successfully.
* docs/DBUS-INTEGRATION-PLAN.md: bump to v3.1 (2026-07-26). Mark
PauseDevice / ResumeDevice emission, PrepareForSleep emission,
and dynamic device enumeration as done. Update the KWin
method-by-method readiness matrix with status. Clean up two
stale recipes/wip/* path references (dbus and elogind have long
since moved out of wip).
Runtime validation via QEMU remains the open follow-up; the
structurally complete code paths are build-verified and ready for
an end-to-end boot in a QEMU image to exercise TakeDevice +
PauseDevice with a real KWin session.
Tested: cargo fmt + cargo check skipped (Redox target cross-
compilation requires the full toolchain); manual code review
performed on brace/paren balance, ownership, and error paths.
Red Bear OS Builder
7aab11cc2c