vasilito
1f0c0a01c5
Adds §68 (v1.44 plan) and revises §67.7 (v1.43
deferred list) to reflect the v1.43 audit findings.
Key corrections captured in the doc:
- The Redox kernel ALREADY implements
sched_setaffinity and sched_getaffinity
(local/sources/kernel/src/syscall/process.rs:322-382).
Only the relibc POSIX <sched.h> wrapper is missing.
- The existing P7-pthread-affinity relibc patch
provides cpu_set_t, cpuset_to_u64, copy_u64_to_cpuset
— v1.44 can reuse these instead of duplicating.
- Kernel pid=0 limitation is documented at
kernel/src/syscall/process.rs:336-338 as a TODO;
v1.44's UX is honest about this ('pin redbear-power's
own TUI to this process's CPU list, not the
highlighted process's').
- Per-thread CPU% is REJECTED for v1.44 because the
Redox proc scheme doesn't expose /proc/<pid>/task/<tid>/stat.
Same trap as v1.41 read_thread_io. Tracked as a kernel
follow-up, not a redbear-power feature.
- disk_history cap is REJECTED for v1.44 because the
natural bound on block device count (~4-8 typical)
makes the cap moot. Drive-by include it elsewhere.
Implementation plan documented:
1. relibc patch P12-sched-setaffinity.patch (~110 LoC,
reusing P7 helpers)
2. redbear-power affinity.rs module (~30 minutes)
3. main.rs key binding (capital A) + PID detail
popup integration (~1.5 hours)
4. 5-7 tests (round-trip, pid=0 limitation, parse/format,
integration against /proc/self/status)
5. Doc update §69 on what shipped
Effort estimate: ~1 working day, end-to-end. The
relibc patch alone is <3 hours given P7 reuse.
Downstream recipe impact audited (LOW):
- Mesa and xz both wrap sched_getaffinity in
defensive probes — they go from ENOSYS to
'current process mask works' (strict improvement,
no break).
No code changes — planning-only commit.
Red Bear OS
A microkernel operating system written in Rust, derived from Redox OS
What is Red Bear OS?
Red Bear OS is a general-purpose, Unix-like operating system with a microkernel architecture, written in Rust. It is a full fork of Redox OS, frozen at release 0.1.0, with added hardware support, filesystem drivers, and a KDE Plasma desktop path.
Goals:
- AMD & Intel parity — first-class support for both platforms on bare metal
- KDE Plasma desktop — Wayland-based desktop environment via the KWin compositor
- Hardware GPU acceleration — AMD GPU (amdgpu) and Intel GPU drivers via
redox-drm - Modern subsystems — USB, Wi‑Fi, Bluetooth, ext4, GRUB, D-Bus
- Offline-first builds — reproducible from archived, BLAKE3-verified sources
Quick Start
Prerequisites
Linux x86_64 host with Rust nightly, QEMU, nasm, and standard build tools.
See the Redox Build Guide for full setup.
Build & Run
# Clone
git clone https://gitea.redbearos.org/vasilito/RedBear-OS.git
cd RedBear-OS
# Recommended: use the Red Bear wrapper
./local/scripts/build-redbear.sh redbear-mini # Text-only target
./local/scripts/build-redbear.sh redbear-full # Desktop-capable target
# Boot in QEMU with the resulting image
make qemu
Build script:
local/scripts/build-redbear.shis the canonical entry point. Baremake allworks but bypasses the.configchecking andREDBEAR_ALLOW_PROTECTED_FETCH=1gates thatbuild-redbear.shenforces. SeeAGENTS.md§ Build Commands for full details.
Public Scripts
| Script | Purpose |
|---|---|
local/scripts/build-redbear.sh |
Canonical build wrapper for redbear-mini/full/grub |
scripts/run.sh |
Build and run in QEMU (-b to build, -c <config> for target) |
scripts/build-iso.sh |
Build a live ISO for bare-metal boot |
scripts/build-all-isos.sh |
Build all live ISO targets |
scripts/network-boot.sh |
PXE network boot helper |
scripts/dual-boot.sh |
Dual-boot installation helper |
Config Targets
| Target | Type | Description |
|---|---|---|
redbear-full |
Desktop | Wayland + KDE + GPU drivers + D-Bus services |
redbear-mini |
Console | Text-only recovery / install target |
redbear-grub |
Console | Text-only with GRUB boot manager |
Current Status
Red Bear OS boots to a login prompt in QEMU with working wired networking, D-Bus system bus, hardware detection daemons, and filesystem support (RedoxFS, ext4, FAT).
| Area | Status |
|---|---|
| Boot (ACPI/x2APIC/SMP) | ✅ Bare-metal proven |
| Userspace drivers (PCI, storage, net) | ✅ Working in QEMU |
| D-Bus system bus + services | ✅ Working (login1, PolicyKit, UDisks, UPower) |
| ext4 / FAT filesystems | ✅ Compiles, installer-wired |
| POSIX gaps (relibc) | 🚧 Bounded Wayland-facing support |
| DRM/KMS display drivers | 🚧 AMD + Intel compile; HW validation pending |
| Wayland compositor | 🚧 Bounded proof; Qt6/KF6 clients crash at init |
| KDE Plasma desktop | 🔄 In progress (Qt6/KF6 compile; KWin/QML blocked) |
| Wi‑Fi / Bluetooth | 📋 Planned (architected, implementation pending) |
How It Works
Red Bear OS uses a userspace driver model — all drivers run as unprivileged daemons:
Kernel (microkernel)
└── schemes: memory, irq, event, pipe, debug
└── Driver daemons (userspace)
├── pcid → PCI enumeration
├── e1000d → Intel ethernet
├── xhcid → USB controller
└── vesad → Display framebuffer
The kernel provides minimal services (memory, interrupts, IPC). Everything else — filesystems, networking, graphics, input — runs in userspace.
Documentation
- Implementation Plan — roadmap and execution model
- Desktop Path Plan — kernel → DRM → Mesa → Wayland → KDE
- D-Bus Integration — session bus architecture
- USB Plan — USB stack design
- Wi‑Fi Plan — wireless architecture
- Bluetooth Plan — BT stack design
- Documentation Index — full doc map
Contributing
Red Bear OS uses a full fork model. Upstream Redox sources are frozen and archived. All custom work lives in local/:
local/
├── patches/ # Durable changes to upstream source trees
├── recipes/ # Custom packages (drivers, GPU, system)
├── docs/ # Integration and planning docs
└── scripts/ # Build, test, and release tooling
We welcome contributions made with or without AI assistance — we care about quality, not how the code was produced.
License
MIT — same as upstream Redox OS.