Kernel+LibKeyboard: Enable querying the current keymap

1 files changed, 32 insertions, 1 deletions

diff --git a/Kernel/Syscalls/setkeymap.cpp b/Kernel/Syscalls/keymap.cpp
index d761e3351b..2cbab8bf46 100644
--- a/Kernel/Syscalls/setkeymap.cpp
+++ b/Kernel/Syscalls/keymap.cpp
@@ -29,6 +29,8 @@
 
 namespace Kernel {
 
+constexpr size_t map_name_max_size = 50;
+
 int Process::sys$setkeymap(Userspace<const Syscall::SC_setkeymap_params*> user_params)
 {
     REQUIRE_PROMISE(setkeymap);
@@ -57,7 +59,6 @@ int Process::sys$setkeymap(Userspace<const Syscall::SC_setkeymap_params*> user_p
     if (map_name.is_error()) {
         return map_name.error();
     }
-    constexpr size_t map_name_max_size = 50;
     if (map_name.value().length() > map_name_max_size) {
         return -ENAMETOOLONG;
     }
@@ -66,4 +67,34 @@ int Process::sys$setkeymap(Userspace<const Syscall::SC_setkeymap_params*> user_p
     return 0;
 }
 
+int Process::sys$getkeymap(Userspace<const Syscall::SC_getkeymap_params*> user_params)
+{
+    REQUIRE_PROMISE(stdio);
+
+    Syscall::SC_getkeymap_params params;
+    if (!copy_from_user(&params, user_params))
+        return -EFAULT;
+
+    String keymap_name = KeyboardDevice::the().keymap_name();
+    const Keyboard::CharacterMapData& character_maps = KeyboardDevice::the().character_maps();
+
+    if (!copy_to_user(params.map, character_maps.map, CHAR_MAP_SIZE * sizeof(u32)))
+        return -EFAULT;
+    if (!copy_to_user(params.shift_map, character_maps.shift_map, CHAR_MAP_SIZE * sizeof(u32)))
+        return -EFAULT;
+    if (!copy_to_user(params.alt_map, character_maps.alt_map, CHAR_MAP_SIZE * sizeof(u32)))
+        return -EFAULT;
+    if (!copy_to_user(params.altgr_map, character_maps.altgr_map, CHAR_MAP_SIZE * sizeof(u32)))
+        return -EFAULT;
+    if (!copy_to_user(params.shift_altgr_map, character_maps.shift_altgr_map, CHAR_MAP_SIZE * sizeof(u32)))
+        return -EFAULT;
+
+    if (params.map_name.size < keymap_name.length())
+        return -ENAMETOOLONG;
+    if (!copy_to_user(params.map_name.data, keymap_name.characters(), keymap_name.length()))
+        return -EFAULT;
+
+    return 0;
+}
+
 }