replace the VHD/diskpart disk image pipeline with a directory-based vvfat root, we'll see when it breaks, fix /O2, add an all_tests, generalize the fat32 driver into a fat 16+32 driver, change policy on volume drivers, collapse KCPU's fields into a single atomic KE_CPU_STATE state machine, move scheduler ticking to per-CPU LAPIC timers, gate verbose SMP topology logging behind selftest diagnostics and add SMP pool-checkpoint validation around AP admission, add checked intrusive list helpers behind a new KE_DEBUG_LIST_CHECKS flag, add ObInitializeObjectHeader/ObTryReferenceObject, add waitable display clock objects and a SYS_OPEN_DISPLAY_CLOCK syscall for vsync-style waits, refactor kernel input into a per-queue KE_INPUT_CONTEXT with its own key/mouse ring buffers and DPC-driven key repeat, add KeInputQueuePeekEvent/ReadEvent/WaitKey and a SYS_QUERY_GLOBAL_INPUT_STATE syscall, split the kernel pool allocator out of mm_virt, new video files!

code/user/tests/cwd_peb_smoke/cwd_peb_smoke.c

@@ -54,6 +54,51 @@ static void fail(const char* what) {
     exit_now(1);
 }
 
+// Copies a string view into a NUL-terminated buffer.
+static int copy_view(char* dst, size_t cap, SYS_STRING_VIEW view) {
+    if (!dst || cap == 0 || !view.Data || view.Length + 1 > cap)
+        return 0;
+    memcpy(dst, view.Data, view.Length);
+    dst[view.Length] = '\0';
+    return 1;
+}
+
+// Computes the parent of one canonical native current-directory string.
+static int parent_of_cwd(const char* cwd, char* out, size_t cap) {
+    if (!cwd || !out || cap == 0)
+        return 0;
+
+    size_t len = strlen(cwd);
+    if (len < 3 || cwd[1] != ':' || (cwd[2] != '/' && cwd[2] != '\\'))
+        return 0;
+    if (len + 1 > cap)
+        return 0;
+
+    memcpy(out, cwd, len + 1);
+    while (len > 3 && (out[len - 1] == '/' || out[len - 1] == '\\'))
+        out[--len] = '\0';
+    if (len <= 3) {
+        out[0] = cwd[0];
+        out[1] = ':';
+        out[2] = '/';
+        out[3] = '\0';
+        return 1;
+    }
+
+    size_t pos = len;
+    while (pos > 3 && out[pos - 1] != '/' && out[pos - 1] != '\\')
+        pos--;
+    if (pos <= 3) {
+        out[0] = cwd[0];
+        out[1] = ':';
+        out[2] = '/';
+        out[3] = '\0';
+    } else {
+        out[pos - 1] = '\0';
+    }
+    return 1;
+}
+
 // Sets the current directory to one native path.
 static void set_cwd_or_fail(const char* path, const char* what) {
     SYS_PATH_REQUEST req = { SysSvFromCstr(path) };
@@ -72,8 +117,8 @@ static void expect_cwd(const char* expected) {
 
 // Program entry point.
 int main(void) {
-    static const char rootPath[] = "0:/";
-    static const char tempDir[] = "0:/cwd_peb_smoke_dir";
+    char original[SYS_CWD_MAX];
+    char parent[SYS_CWD_MAX];
 
     print("cwd_peb_smoke: start\n");
 
@@ -82,25 +127,19 @@ int main(void) {
     if (peb->Magic != SYS_PEB_MAGIC) fail("peb magic mismatch");
     if (peb->Version != SYS_ENV_VERSION) fail("peb version mismatch");
 
-    set_cwd_or_fail(rootPath, "set root cwd");
-    expect_cwd(rootPath);
+    if (!copy_view(original, sizeof(original), SysGetCurrentDirectoryView()))
+        fail("initial cwd missing");
+    if (!parent_of_cwd(original, parent, sizeof(parent)))
+        fail("initial cwd malformed");
 
-    SYS_PATH_REQUEST dirReq = { SysSvFromCstr(tempDir) };
-    uint32_t status = SysRemoveDir(&dirReq);
-    if (status != NTLSTATUS_SUCCESS && status != NTLSTATUS_NOT_FOUND)
-        fail_status("remove stale temp dir", status);
+    set_cwd_or_fail(".", "set dot cwd");
+    expect_cwd(original);
 
-    status = SysCreateDir(&dirReq);
-    if (status != NTLSTATUS_SUCCESS) fail_status("create temp dir", status);
+    set_cwd_or_fail("..", "set parent cwd");
+    expect_cwd(parent);
 
-    set_cwd_or_fail(tempDir, "set temp cwd");
-    expect_cwd(tempDir);
-
-    set_cwd_or_fail(rootPath, "restore root cwd");
-    expect_cwd(rootPath);
-
-    status = SysRemoveDir(&dirReq);
-    if (status != NTLSTATUS_SUCCESS) fail_status("remove temp dir", status);
+    set_cwd_or_fail(original, "restore original cwd");
+    expect_cwd(original);
 
     print("cwd_peb_smoke: PASS\n");
     exit_now(0);