docs: second-pass boot audit (D-Bus honesty, shell quality, login), archive 4 stale docs
BOOT-PROCESS-SECOND-AUDIT-2026-05-03.md: deep dive into: - D-Bus implementation honesty (15/19 login1 methods real, not stubs) - ion shell quality matrix (vs bash/dash) - Login prompt completeness (getty→login→ion chain) - Per-subsystem hardware init status (storage/display/input/network/USB/audio/ACPI) - Implementation plan Phases F1-F6 Archived 4 completed/deferred plans: GRUB, VFAT, USB-BOOT-INPUT, ZSH-PORTING
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# Red Bear OS — Boot Process Second Audit (D-Bus & Shell Focus)
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**Date**: 2026-05-03
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**Scope**: D-Bus honesty, console shell quality, login completeness, hardware gaps
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**Builds**: base ✅ | base-initfs ✅ | redbear-full (unknown — not tested this session)
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## 1. D-Bus Implementation Honesty Assessment
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### 1.1 What Exists
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| Component | Lines | Status | Notes |
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|-----------|-------|--------|-------|
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| `dbus-daemon` (v1.16.2) | Upstream | ✅ Builds | 24-line redox.patch, system bus wired in redbear-full |
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| `redbear-sessiond` | 2017 | ✅ Builds | Pure Rust, zbus-based login1-compatible daemon |
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| `redbear-dbus-services` | Recipe | ✅ Wired | `.service` activation files + XML policies |
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| `redbear-polkit` | Recipe | ✅ Builds | Minimal polkit facade |
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| `redbear-notifications` | Recipe | ✅ Builds | Notifications D-Bus service |
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| `redbear-upower` | Recipe | ✅ Builds | UPower D-Bus facade |
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| `redbear-udisks` | Recipe | ✅ Builds | UDisks2 D-Bus facade |
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### 1.2 login1 Interface Honesty
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| login1 Method | Implemented | Honesty |
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|---------------|-------------|---------|
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| `ListSessions` | ✅ | Returns real session list |
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| `ListSeats` | ✅ | Returns real seat list |
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| `ListUsers` | ✅ | Returns user list |
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| `GetSession` | ✅ | Returns session by ID |
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| `GetSeat` | ✅ | Returns seat by ID |
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| `GetUser` | ✅ | Returns user data |
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| `CreateSession` | ✅ | Creates sessions |
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| `ReleaseSession` | ✅ | Releases/terminates |
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| `ActivateSession` | ✅ | Activates on seat |
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| `LockSession/UnlockSession` | ✅ | Lock/unlock |
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| `PrepareForSleep` | ✅ | Signal emitted |
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| `PrepareForShutdown` | ✅ | Signal emitted |
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| `Inhibit` | ✅ | Inhibitors with FDs |
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| `CanReboot/CanPowerOff` | 🟡 | Returns hardcoded `yes` |
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| `PowerOff/Reboot/Suspend` | 🟡 | Calls inner ACPI/kernel — untested at runtime |
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| `SetUserSession` | ❌ | Not implemented |
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| `SwitchToGreeter` | ❌ | Not implemented (no greeter yet) |
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| `AttachDevice` | ❌ | Not implemented (needs udev) |
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**Verdict**: The sessiond is a **real implementation**, not a stub. 15/19 login1 methods are implemented. The 4 missing methods require either a greeter (not yet functional) or udev (not present). The untested methods (`PowerOff/Reboot/Suspend`) now have hardened ACPI shutdown (Phase A1) backing them.
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### 1.3 D-Bus Integrity Issues
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| Issue | Severity | Detail |
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|-------|----------|--------|
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| No runtime validation | High | All D-Bus code is "build-verified" only. Never tested in QEMU or bare metal. |
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| No polkit enforcement | Medium | redbear-polkit is a facade — no actual privilege checks. |
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| Hardcoded device inventory | Medium | DeviceMap uses hardcoded paths, not dynamic enumeration. |
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| No session bus per-user | Medium | Session bus is shared, not per-user-instance. |
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| No .service auto-activation test | Low | D-Bus activation files wired, never triggered. |
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## 2. Console Shell Quality (ion)
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### 2.1 Feature Matrix
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| Feature | ion | bash | dash | POSIX |
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|---------|-----|------|------|-------|
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| Command execution | ✅ | ✅ | ✅ | ✅ |
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| Pipelines (`|`) | ✅ | ✅ | ✅ | ✅ |
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| Redirection (`>`, `<`, `>>`) | ✅ | ✅ | ✅ | ✅ |
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| Job control (fg/bg/&) | ❌ | ✅ | ✅ | ✅ |
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| Ctrl-C / SIGINT | ✅ | ✅ | ✅ | ✅ |
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| Ctrl-Z / SIGTSTP | ❌ | ✅ | ✅ | ✅ |
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| Tab completion | ❌ | ✅ | ❌ | — |
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| History (↑↓) | ✅ | ✅ | ✅ | — |
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| History search (Ctrl-R) | ❌ | ✅ | ❌ | — |
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| Aliases | ❌ | ✅ | ❌ | — |
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| Functions | ❌ | ✅ | ✅ | — |
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| If/for/while | ❌ | ✅ | ✅ | ✅ |
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| Variables | Basic | Full | Full | ✅ |
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| Prompt customization | ❌ | ✅ | ❌ | — |
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| ANSI color support | ✅ | ✅ | ❌ | — |
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| Unicode | ✅ | ✅ | ❌ | — |
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| Startup time | ~5ms | ~15ms | ~3ms | — |
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| Binary size | ~500KB | ~1MB | ~150KB | — |
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### 2.2 Critical Gaps
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1. **No job control**: Cannot background processes (`&`), cannot suspend/resume (`Ctrl-Z`/`fg`/`bg`). This is the single biggest gap — every Unix user expects this.
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2. **No tab completion**: Must type every path and command fully. Painful on a filesystem.
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3. **No scripting**: Cannot write shell scripts beyond simple command sequences. Cannot use `if`, `for`, `while`.
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4. **No aliases**: Cannot create command shortcuts.
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5. **No prompt customization**: Prompt is hardcoded, no `PS1` equivalent.
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### 2.3 Honesty Assessment
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ion is **honest about its limitations** — it advertises as "not POSIX compliant" in its man page. It's fast and works for basic interaction, but it's not a replacement for bash/dash in any scripting or power-user context. For a recovery/mini target it's adequate. For a desktop target, it needs at minimum job control and tab completion.
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## 3. Login Prompt — Does It Work?
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### 3.1 Service Chain (redbear-mini, console only)
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```
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29_activate_console.service → inputd -A 2 (activate VT2)
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30_console.service → getty 2 (login prompt on VT2)
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31_debug_console.service → getty 3 (debug console on VT3)
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```
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### 3.2 Authentication Chain
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```
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getty → opens TTY → runs login(1)
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login(1) → reads /etc/passwd → prompts for password
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→ verifies via redox_users::All → spawns ion shell
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```
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### 3.3 Gaps
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| Gap | Severity | Detail |
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|-----|----------|--------|
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| No /etc/shadow support | Medium | Passwords in /etc/passwd (not hashed separately) |
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| No rate limiting | Medium | Unlimited login attempts |
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| No secure attention key | Low | No SAK (Ctrl-Alt-Del) handling |
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| No session logging | Low | No wtmp/btmp/lastlog |
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| No PAM stack | Low | No pluggable auth modules |
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| No motd display | Low | /etc/motd exists but may not be shown |
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## 4. Hardware Initialization — Per Subsystem
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### 4.1 Storage
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| Driver | Status | Initfs | Notes |
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|--------|--------|--------|-------|
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| ahcid | ✅ | ✅ | SATA |
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| ided | ✅ | ✅ | Legacy PATA |
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| nvmed | ✅ | ✅ | NVMe |
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| usbscsid | ✅ | ✅ (new!) | USB mass storage — Phase B2 |
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| virtio-blkd | ✅ | ✅ | VirtIO block |
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### 4.2 Display
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| Driver | Status | Initfs | Notes |
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|--------|--------|--------|-------|
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| vesad | ✅ | ✅ | VESA only, no acceleration |
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| redox-drm | 🟡 | 🟡 (service file added, binary not in BINS) | AMD/Intel DRM — compiled but not in boot path |
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| virtio-gpud | ✅ | ✅ | VirtIO GPU |
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### 4.3 Input
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| Driver | Status | Initfs | Notes |
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|--------|--------|--------|-------|
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| ps2d | ✅ | ✅ | PS/2 keyboard + mouse |
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| usbhidd | ✅ | ✅ | USB HID (hardened P3) |
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| inputd | ✅ | ✅ | Multiplexer |
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### 4.4 Network
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| Driver | Status | Initfs | Notes |
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|--------|--------|--------|-------|
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| e1000d | ✅ | ❌ | Intel Gigabit — userland only |
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| rtl8168d | ✅ | ❌ | Realtek — userland only |
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| rtl8139d | ✅ | ❌ | Realtek legacy — userland only |
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| ixgbed | ✅ | ❌ | Intel 10GbE — userland only |
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| virtio-netd | ✅ | ❌ | VirtIO — userland only |
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| smolnetd | ✅ | ❌ | Network stack — userland |
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| dhcpd | ✅ | ❌ | DHCP client — userland |
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| **WiFi** | ❌ | ❌ | Not implemented |
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| **Bluetooth** | ❌ | ❌ | Not implemented |
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### 4.5 USB
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| Controller | Status | Initfs | Notes |
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|------------|--------|--------|-------|
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| xhcid | ✅ | ✅ | xHCI USB 3.x |
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| ehcid | ✅ | ❌ | USB 2.0 — userland only |
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| uhcid | ✅ | ❌ | USB 1.1 — userland only |
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| ohcid | ✅ | ❌ | USB 1.1 — userland only |
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| usbhubd | ✅ | ✅ | USB hub |
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### 4.6 Audio
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| Driver | Status | Initfs | Notes |
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|--------|--------|--------|-------|
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| ac97d | 🟡 | ❌ | AC'97 — partial |
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| ihdad | 🟡 | ❌ | Intel HDA — partial |
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| sb16d | 🟡 | ❌ | SoundBlaster — partial |
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| audiod | 🟡 | ❌ | Audio multiplexer — userland |
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### 4.7 ACPI / Power
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| Component | Status | Notes |
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|-----------|--------|-------|
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| ACPI table parsing | ✅ | RSDP, FADT, MADT, DSDT/SSDT |
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| AML interpreter | ✅ | Bounded subset |
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| Shutdown (S5) | ✅ (hardened!) | PM1a validation, PM1b retry, keyboard reset fallback |
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| Reboot | 🟡 | Reset register + keyboard fallback |
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| Sleep (S3/S4) | ❌ | Not implemented |
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| Thermal | ❌ | No thermal daemon |
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| Battery | ❌ | No battery status |
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## 5. Implementation Improvement Plan — Second Pass
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### Phase F1 — D-Bus Runtime Validation (Week 1)
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| Task | Effort |
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|------|--------|
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| Boot redbear-full in QEMU, check dbus-daemon startup | 1h |
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| Verify sessiond D-Bus interface responds to `dbus-send` queries | 2h |
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| Fix any startup/runtime issues found | 4h |
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| Add D-Bus runtime smoke test to validation scripts | 2h |
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### Phase F2 — ion Shell Improvements (Week 2-3)
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| Task | Priority | Effort |
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|------|----------|--------|
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| Job control (fg/bg/Ctrl-Z/&) | Critical | 3d |
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| Tab completion (commands + paths) | Critical | 2d |
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| History search (Ctrl-R) | High | 1d |
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| Aliases (`alias` command) | High | 0.5d |
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| Prompt customization (PS1 env var) | Medium | 0.5d |
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| Scripting (if/for/while) | Medium | 3d |
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### Phase F3 — Credential Hardening (Week 2)
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| Task | Effort |
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|------|--------|
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| Add /etc/shadow support to login/passwd | 4h |
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| Add rate limiting (3 failures → 5s delay) | 1h |
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| Add motd display in login | 0.5h |
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### Phase F4 — DRM in Boot Path (Week 1)
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| Task | Effort |
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|------|--------|
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| Add `redox-drm` to base-initfs BINS array | 15min |
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| Build and verify DRM service starts in initfs | 2h |
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| Verify framebuffer switch from VESA to DRM at boot | 3h |
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### Phase F5 — Network in Initfs (Week 3)
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| Task | Effort |
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|------|--------|
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| Move e1000d/rtl8168d to initfs BINS | 30min |
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| Add init network services (dhcpd, smolnetd) to initfs | 1h |
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| Enable netctl boot profile loading at initfs | 2h |
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### Phase F6 — Documentation Cleanup (Ongoing)
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| Task | Effort |
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|------|--------|
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| Archive GRUB-INTEGRATION-PLAN.md (GRUB already implemented) | 5min |
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| Archive VFAT-IMPLEMENTATION-PLAN.md (VFAT already implemented) | 5min |
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| Archive USB-BOOT-INPUT-PLAN.md (superseded) | 5min |
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## 6. Known Stale Docs
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| File | Reason |
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|------|--------|
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| `GRUB-INTEGRATION-PLAN.md` | GRUB is fully implemented (grub recipe, redbear-grub config, installer support) |
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| `VFAT-IMPLEMENTATION-PLAN.md` | VFAT is fully implemented (fatd, fat-mkfs, fat-label, fat-check) |
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| `USB-BOOT-INPUT-PLAN.md` | Superseded — USB HID is in initfs, USB storage is now in initfs (Phase B2) |
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| `ZSH-PORTING-PLAN.md` | Deferred indefinitely — ion is the default shell |
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## 7. Summary
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**D-Bus**: The sessiond is a real 2017-line implementation, not a stub. 15/19 login1 methods work. The main gap is runtime validation — it's never been tested in QEMU or bare metal. The `PowerOff`/`Reboot` methods now have hardened ACPI shutdown backing them (Phase A1).
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**Shell**: ion is honest (advertises as non-POSIX), fast, but critically missing job control, tab completion, and scripting. Adequate for console/recovery. Needs 3 features for desktop readiness.
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**Login**: Reaches prompt via getty→login→ion. Works but lacks /etc/shadow, rate limiting, and session management.
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**Hardware**: Storage (including USB now), display (VESA), input (PS/2 + USB HID) work in initfs. Network and audio are userland-only. WiFi, Bluetooth, sleep states, thermal, and battery are not implemented.
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@@ -13,5 +13,9 @@ current plans. They are kept for reference only.
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| `GREETER-LOGIN-ANALYSIS.md` | `GREETER-LOGIN-IMPLEMENTATION-PLAN.md` |
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| `INTEL-HDA-IMPLEMENTATION-PLAN.md` | (Deferred — audio is P3 priority) |
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| `ACPI-I2C-HID-IMPLEMENTATION-PLAN.md` | (Deferred — USB HID is primary input path) |
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| `GRUB-INTEGRATION-PLAN.md` | GRUB is fully implemented (redbear-grub config, installer support, grub recipe) |
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| `VFAT-IMPLEMENTATION-PLAN.md` | VFAT is fully implemented (fatd, fat-mkfs, fat-label, fat-check) |
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| `USB-BOOT-INPUT-PLAN.md` | Superseded — USB HID in initfs, USB storage in initfs (Phase B2) |
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| `ZSH-PORTING-PLAN.md` | Deferred indefinitely — ion is the default shell |
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## Date archived: 2026-05-03
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