cp: Show an error message when attempting to copy a directory into a file

apps/cp.cpp

@@ -81,6 +81,11 @@ Result<void> copy_tree(StringView source, StringView destination, bool verbose,
     {
         path = TRY(String::from_string_view(destination));
         if (!os::FileSystem::exists(path.view(), false)) TRY(os::FileSystem::create_directory(path.view(), 0755));
+        else
+        {
+            os::eprintln("cp: cannot overwrite non-directory '%s' with directory '%s'", path.chars(), source.chars());
+            return {};
+        }
     }
 
     auto dir = TRY(os::Directory::open(source));

base/etc/init/99-login

@@ -1,5 +1,5 @@
 Name=login
-Description=Start the display server.
+Description=Start a graphical user session.
 Command=/usr/bin/startui --user=selene
 StandardOutput=/dev/uart0
 StandardError=/dev/uart0

base/etc/startup/mount-home.sh

@@ -2,5 +2,9 @@
 # Create and populate a volatile home directory.
 mount -t tmpfs tmpfs /home/selene
 chown selene:selene /home/selene
+
 cp /etc/skel/welcome /home/selene/
 cp /etc/skel/LICENSE /home/selene/
+
+chown selene:selene /home/selene/welcome
+chown selene:selene /home/selene/LICENSE