Kernel: Add "setkeymap" pledge promise

Base/usr/share/man/man2/pledge.md

@@ -49,6 +49,7 @@ If the process later attempts to use any system functionality it has previously
 * `chroot`: The [`chroot(2)`](chroot.md) syscall (\*)
 * `video`: May use [`ioctl(2)`](ioctl.md) and [`mmap(2)`](mmap.md) on framebuffer video devices
 * `settime`: Changing the system time and date
+* `setkeymap`: Changing the system keyboard layout
 * `sigaction`: Change signal handlers and dispositions (\*)
 
 Promises marked with an asterisk (\*) are SerenityOS specific extensions not supported by the original OpenBSD `pledge()`.

Kernel/Process.cpp

@@ -4295,10 +4295,11 @@ ssize_t Process::sys$getrandom(void* buffer, size_t buffer_size, unsigned int fl
 
 int Process::sys$setkeymap(const Syscall::SC_setkeymap_params* user_params)
 {
+    REQUIRE_PROMISE(setkeymap);
+
     if (!is_superuser())
         return -EPERM;
 
-    REQUIRE_NO_PROMISES;
     Syscall::SC_setkeymap_params params;
     if (!validate_read_and_copy_typed(&params, user_params))
         return -EFAULT;

Kernel/Process.h

@@ -36,11 +36,11 @@
 #include <Kernel/FileSystem/InodeMetadata.h>
 #include <Kernel/Forward.h>
 #include <Kernel/Lock.h>
+#include <Kernel/StdLib.h>
 #include <Kernel/Syscall.h>
 #include <Kernel/Thread.h>
 #include <Kernel/UnixTypes.h>
 #include <Kernel/VM/RangeAllocator.h>
-#include <Kernel/StdLib.h>
 #include <LibC/signal_numbers.h>
 
 namespace ELF {
@@ -74,6 +74,7 @@ extern VirtualAddress g_return_to_ring3_from_signal_trampoline;
     __ENUMERATE_PLEDGE_PROMISE(accept)    \
     __ENUMERATE_PLEDGE_PROMISE(settime)   \
     __ENUMERATE_PLEDGE_PROMISE(sigaction) \
+    __ENUMERATE_PLEDGE_PROMISE(setkeymap) \
     __ENUMERATE_PLEDGE_PROMISE(shared_buffer)
 
 enum class Pledge : u32 {