isolate POSIX builds from the host UCRT, wire lwext4 and ntfs-3g as ext4.sys and ntfs.sys, split the FAT driver into directory/file/async/driver/mount units, add posixsrv and dwm plus input/console/desktop syscall clients and a pile of new smoke targets, rename serial.sys to cereal.sys, name HDA/USB/lwIP/AHCI workers, harden ATA probing/reset/removal around actual hardware deadlines, absent-channel detection, diagnostics and explicit worker lifetime, redo ACPI S5 shutdown around GAS/MMIO and HW-reduced firmware, scan SSDTs for _S5 and deal with Intel SMI sleep trapping, make serial and SMP timeouts use real monotonic deadlines, add thread names and fix terminal thread teardown, scheduler and APC prepare/commit races, make advisory file locks queryable and preserve split ranges and add mutable file append state, add shared-memory pipes with kernel-assisted wait/wake, introduce capability-scoped input and display managers, split surface map rights into read/write, add explicit unmap and replace present with commit/generation/damage tracking while keeping physical presentation under the display manager, decouple native exception classes from Win32 exception numbers and translate them in kernel32, add opaque process startup data, bump the resource protocol to v3 with namespace directories, symlinks and enumeration and service control to v2 with generic READY handle exports, add the new POSIX errno/status surface and rebuild fds around posixsrv-owned shared open descriptions, descriptor-local flags, exact inheritance snapshots, dup/fcntl/record locks and shared-ring pipes, add waitpid, POSIX credentials/groups/sessions/passwd/group lookups and move sockets onto stable open descriptions, port the shells and apps to the new console/input services and surface commit API, teach init to load services.ini and start/supervise RSSRV, DWM and generic services under restricted capabilities while publishing their endpoints through RSSRV, split RSSRV into namespace, volume, display, session, input, console and resource components and make /SystemRoot a real symlink to the independently published system volume, shift the syscall table again, expand lock/resource/surface/POSIX/service/thread smoke coverage, make docs scream ASK QUESTIONS and DISCUSS at LLMs, replace MIT No Attribution with WTFPL+.

code/public/posix/errno.h

@@ -0,0 +1,50 @@
+// POSIX errno declarations backed by nt-lite per-thread personality state.
+
+#pragma once
+
+#include <ntlite_posix_api.h>
+
+// errno values are an nt-lite POSIX personality ABI. POSIX specifies the
+// symbolic names, not their numeric representation, so keep this table compact
+// and personality-owned instead of inheriting numbers from another Unix ABI.
+#define EPERM          1
+#define ENOENT         2
+#define ESRCH          3
+#define EINTR          4
+#define EIO            5
+#define ENOEXEC        6
+#define EBADF          7
+#define ECHILD         8
+#define ENOMEM         9
+#define EACCES        10
+#define EFAULT        11
+#define EEXIST        12
+#define EXDEV         13
+#define ENODEV        14
+#define ENOTDIR       15
+#define EISDIR        16
+#define EINVAL        17
+#define EMFILE        18
+#define EFBIG         19
+#define ENOSPC        20
+#define ESPIPE        21
+#define EROFS         22
+#define EMLINK        23
+#define EPIPE         24
+#define ERANGE        25
+#define EAGAIN        26
+#define EWOULDBLOCK   EAGAIN
+#define ENAMETOOLONG  27
+#define ENOSYS        28
+#define ENOTEMPTY     29
+#define EDEADLK       30
+#define ENOTSOCK      31
+#define EAFNOSUPPORT  32
+#define ECONNRESET    33
+#define EINPROGRESS   34
+#define ETIMEDOUT     35
+#define ECANCELED     36
+
+NTL_POSIX_API int* __ntl_posix_errno_location(void);
+
+#define errno (*__ntl_posix_errno_location())