server: Implement support for DUPLICATE_SAME_ATTRIBUTES in DuplicateHandle().

dlls/kernel32/tests/process.c

@@ -2560,7 +2560,6 @@ static void test_DuplicateHandle(void)
                         0, TRUE, DUPLICATE_SAME_ACCESS | DUPLICATE_SAME_ATTRIBUTES);
     ok(r, "DuplicateHandle error %lu\n", GetLastError());
     r = GetHandleInformation(out, &info);
-    todo_wine
     ok(r && info == 0, "Unexpected info %lx\n", info);
     CloseHandle(out);
 
@@ -2576,7 +2575,6 @@ static void test_DuplicateHandle(void)
     ok(r, "DuplicateHandle error %lu\n", GetLastError());
     info = 0xdeabeef;
     r = GetHandleInformation(out, &info);
-    todo_wine
     ok(r && info == (HANDLE_FLAG_INHERIT | HANDLE_FLAG_PROTECT_FROM_CLOSE), "Unexpected info %lx\n", info);
     r = SetHandleInformation(out, HANDLE_FLAG_PROTECT_FROM_CLOSE, 0);
     ok(r, "SetHandleInformation error %lu\n", GetLastError());
@@ -2590,7 +2588,6 @@ static void test_DuplicateHandle(void)
     ok(r, "DuplicateHandle error %lu\n", GetLastError());
     info = 0xdeabeef;
     r = GetHandleInformation(out, &info);
-    todo_wine
     ok(r && info == 0, "Unexpected info %lx\n", info);
     CloseHandle(out);
 }

server/handle.c

@@ -566,7 +566,7 @@ obj_handle_t duplicate_handle( struct process *src, obj_handle_t src_handle, str
 {
     obj_handle_t res;
     struct handle_entry *entry;
-    unsigned int src_access;
+    unsigned int src_access, src_flags;
     struct object *obj = get_handle_obj( src, src_handle, 0, NULL );
 
     if (!obj) return 0;
@@ -574,6 +574,7 @@ obj_handle_t duplicate_handle( struct process *src, obj_handle_t src_handle, str
         src_access = entry->access;
     else  /* pseudo-handle, give it full access */
         src_access = obj->ops->map_access( obj, GENERIC_ALL );
+    src_flags = (src_access & RESERVED_ALL) >> RESERVED_SHIFT;
     src_access &= ~RESERVED_ALL;
 
     if (options & DUPLICATE_SAME_ACCESS)
@@ -611,6 +612,9 @@ obj_handle_t duplicate_handle( struct process *src, obj_handle_t src_handle, str
             res = alloc_handle_entry( dst, obj, access, attr );
     }
 
+    if (res && (options & DUPLICATE_SAME_ATTRIBUTES))
+        set_handle_flags( dst, res, ~0u, src_flags );
+
     release_object( obj );
     return res;
 }