keymap: Add back a tiny utility for setting the system keyboard layout

This patch removes the setuid-root flag from the KeyboardSettings GUI
application and adds back the old "keymap" program.

It doesn't feel very safe and sound to have a GUI program runnable
as setuid-root, so in the next patch I'll be making KeyboardSettings
call out to the "keymap" program to do its bidding.

Applications/KeyboardSettings/main.cpp

@@ -43,21 +43,6 @@
 
 int main(int argc, char** argv)
 {
-    const char* path = nullptr;
-    Core::ArgsParser args_parser;
-    args_parser.add_positional_argument(path, "The mapping file to be used", "file", Core::ArgsParser::Required::No);
-    args_parser.parse(argc, argv);
-
-    if (path != nullptr) {
-        Keyboard::CharacterMap character_map(path);
-        int rc = character_map.set_system_map();
-
-        if (rc != 0) {
-            fprintf(stderr, "%s\n", strerror(-rc));
-        }
-
-        return rc;
-    }
 
     // If there is no command line parameter go for GUI.
     GUI::Application app(argc, argv);

Meta/build-root-filesystem.sh

@@ -37,7 +37,7 @@ chown $window_uid:$window_gid mnt/etc/WindowServer/WindowServer.ini
 echo "/bin/sh" > mnt/etc/shells
 
 chown 0:$wheel_gid mnt/bin/su
-chown 0:$wheel_gid mnt/bin/KeyboardSettings
+chown 0:$phys_gid mnt/bin/keymap
 chown 0:$phys_gid mnt/bin/shutdown
 chown 0:$phys_gid mnt/bin/reboot
 chown 0:0 mnt/boot/Kernel
@@ -48,7 +48,7 @@ chmod 4750 mnt/bin/su
 chmod 4755 mnt/bin/ping
 chmod 4750 mnt/bin/reboot
 chmod 4750 mnt/bin/shutdown
-chmod 4750 mnt/bin/KeyboardSettings
+chmod 4750 mnt/bin/keymap
 
 echo "done"
 
@@ -161,7 +161,6 @@ ln -s Debugger mnt/bin/sdb
 ln -s SystemMonitor mnt/bin/sm
 ln -s ProfileViewer mnt/bin/pv
 ln -s WebServer mnt/bin/ws
-ln -s KeyboardSettings mnt/bin/keymap
 ln -s Solitaire mnt/bin/sl
 ln -s WebView mnt/bin/wv
 echo "done"

Userland/CMakeLists.txt

@@ -12,8 +12,10 @@ target_link_libraries(avol LibAudio)
 target_link_libraries(copy LibGUI)
 target_link_libraries(disasm LibX86)
 target_link_libraries(functrace LibDebug LibX86)
-target_link_libraries(html LibWeb)
 target_link_libraries(ht LibWeb)
+target_link_libraries(html LibWeb)
+target_link_libraries(js LibJS LibLine)
+target_link_libraries(keymap LibKeyboard)
 target_link_libraries(lspci LibPCIDB)
 target_link_libraries(man LibMarkdown)
 target_link_libraries(md LibMarkdown)
@@ -24,4 +26,3 @@ target_link_libraries(paste LibGUI)
 target_link_libraries(pro LibProtocol)
 target_link_libraries(test-crypto LibCrypto LibTLS LibLine)
 target_link_libraries(tt LibPthread)
-target_link_libraries(js LibJS LibLine)

Userland/keymap.cpp

@@ -0,0 +1,35 @@
+#include <LibCore/ArgsParser.h>
+#include <LibKeyboard/CharacterMap.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+
+int main(int argc, char** argv)
+{
+    if (pledge("stdio setkeymap rpath", nullptr) < 0) {
+        perror("pledge");
+        return 1;
+    }
+
+    if (unveil("/res/keymaps", "r") < 0) {
+        perror("unveil");
+        return 1;
+    }
+
+    if (unveil(nullptr, nullptr) < 0) {
+        perror("unveil");
+        return 1;
+    }
+
+    const char* path = nullptr;
+    Core::ArgsParser args_parser;
+    args_parser.add_positional_argument(path, "The mapping file to be used", "file");
+    args_parser.parse(argc, argv);
+
+    Keyboard::CharacterMap character_map(path);
+    int rc = character_map.set_system_map();
+    if (rc != 0)
+        fprintf(stderr, "%s\n", strerror(-rc));
+
+    return rc;
+}