Phase S1 (Critical Correctness):
- sem_open/sem_close: global refcounting via BTreeMap + AtomicUsize
- sem_close: decrements refcount, munmaps only at zero
- sem_open: reuses existing mapping, O_EXCL returns EEXIST
- sem_unlink: marks entry for removal before shm_unlink
- va_list parsing: reads mode_t and value from stack after oflag
- All 11 sem_* functions verified in libc.so T
Phase S2-S4 (Designed, documented):
- eventfd() function, signalfd read path, EINTR handling
- name canonicalization, cancellation safety
- Full plan in local/docs/RELIBC-AGAINST-GLIBC-ASSESSMENT.md
Reference: glibc 2.41 cloned to local/reference/glibc/
Boot verified: greeter ready on VT 3 with refcounted semaphores
Build system (src/cook/fetch.rs):
- Atomic patch application: applies patches to staging directory (cp -al),
atomically swaps on success, discards on failure — source tree is never
left in a partially-patched state
- normalize_patch(): strips diff --git/index/new-file-mode headers that the
build system's patch command does not recognize
- cleanup_workspace_pollution(): removes orphaned recipes/Cargo.toml and
recipes/Cargo.lock to prevent workspace conflicts
- Added --allow-protected CLI flag to repo binary
Input stack (local/patches/base/P3-*.patch):
- P3-ps2d-led-feedback: PS/2 LED state handling + InputProducer migration
- P3-inputd-keymap-bridge: InputProducer enum, keymap bridge query
- P3-usbhidd-hardening: HID descriptor validation, static lookup table,
8-button mouse support, transfer retry with exponential backoff
- P3-init-colored-output: ANSI-color coded init daemon output (green OK,
red FAILED, yellow SKIP/WARN)
XKB bridge (local/recipes/system/redbear-keymapd/source/src/xkb.rs):
- Parses X11 xkb/symbols/* format, maps XKB keycodes to PS/2 scancodes,
80+ X11 keysym names to Unicode, 4-level key support
Patch governance (local/patches/base/absorbed/README.md):
- Documents consolidation of P0-P3 patches into redox.patch
vasilito