Kernel: Add load_keymap syscall and load Finnish keymap in init

kernel/include/kernel/Process.h

@@ -146,6 +146,8 @@ namespace Kernel
 
 		BAN::ErrorOr<long> sys_clock_gettime(clockid_t, timespec*);
 
+		BAN::ErrorOr<long> sys_load_keymap(const char* path);
+
 		TTY& tty() { ASSERT(m_controlling_terminal); return *m_controlling_terminal; }
 
 		static Process& current() { return Thread::current().process(); }

kernel/kernel/Process.cpp

@@ -5,6 +5,7 @@
 #include <kernel/FS/ProcFS/FileSystem.h>
 #include <kernel/FS/VirtualFileSystem.h>
 #include <kernel/IDT.h>
+#include <kernel/Input/KeyboardLayout.h>
 #include <kernel/InterruptController.h>
 #include <kernel/LockGuard.h>
 #include <kernel/Memory/FileBackedRegion.h>
@@ -1253,6 +1254,17 @@ namespace Kernel
 		return 0;
 	}
 
+
+	BAN::ErrorOr<long> Process::sys_load_keymap(const char* path)
+	{
+		LockGuard _(m_lock);
+		TRY(validate_string_access(path));
+
+		auto absolute_path = TRY(absolute_path_of(path));
+		TRY(Input::KeyboardLayout::get().load_from_file(absolute_path));
+		return 0;
+	}
+
 	BAN::ErrorOr<long> Process::sys_signal(int signal, void (*handler)(int))
 	{
 		if (signal < _SIGMIN || signal > _SIGMAX)

kernel/kernel/Syscall.cpp

@@ -210,6 +210,9 @@ namespace Kernel
 		case SYS_CHOWN:
 			ret = Process::current().sys_chown((const char*)arg1, (uid_t)arg2, (gid_t)arg3);
 			break;
+		case SYS_LOAD_KEYMAP:
+			ret = Process::current().sys_load_keymap((const char*)arg1);
+			break;
 		default:
 			dwarnln("Unknown syscall {}", syscall);
 			break;