From c9711c4ea8e5fccc23255e9f6ae86b15006aa6ea Mon Sep 17 00:00:00 2001
From: Felix Morgner <felix.morgner@ost.ch>
Date: Wed, 26 Aug 2026 23:01:14 +0200
Subject: kapi/fs: add stub implementation of read_directory

---
 kernel/kapi/filesystem.cpp       | 11 +++++++++++
 kernel/kapi/filesystem.tests.cpp |  9 +++++++++
 2 files changed, 20 insertions(+)

(limited to 'kernel')

diff --git a/kernel/kapi/filesystem.cpp b/kernel/kapi/filesystem.cpp
index e50ce2c0..7a0c2728 100644
--- a/kernel/kapi/filesystem.cpp
+++ b/kernel/kapi/filesystem.cpp
@@ -4,6 +4,7 @@
 
 #include <kstd/memory.hpp>
 #include <kstd/result.hpp>
+#include <kstd/system_error.hpp>
 #include <kstd/units.hpp>
 
 #include <cstddef>
@@ -11,6 +12,7 @@
 #include <expected>
 #include <span>
 #include <string_view>
+#include <utility>
 
 namespace kapi::filesystem
 {
@@ -88,4 +90,13 @@ namespace kapi::filesystem
     return kernel::vfs::vfs::get().create_device_node(path, static_cast<std::uint32_t>(type), number);
   }
 
+  auto read_directory(std::size_t file_descriptor, directory_cursor position, std::span<directory_entry> buffer)
+      -> kstd::result<std::pair<std::size_t, directory_cursor>>
+  {
+    static_cast<void>(file_descriptor);
+    static_cast<void>(position);
+    static_cast<void>(buffer);
+    return kstd::failure(make_error_code(kstd::errc::not_supported));
+  }
+
 }  // namespace kapi::filesystem
\ No newline at end of file
diff --git a/kernel/kapi/filesystem.tests.cpp b/kernel/kapi/filesystem.tests.cpp
index d23255c3..b2e39967 100644
--- a/kernel/kapi/filesystem.tests.cpp
+++ b/kernel/kapi/filesystem.tests.cpp
@@ -292,6 +292,15 @@ SCENARIO_METHOD(kernel::tests::vfs::storage_boot_module_vfs_fixture, "Kapi files
 
       REQUIRE(kapi::filesystem::umount("/information"));
     }
+
+    THEN("listing the contents of a directory fails")
+    {
+      auto directory = kapi::filesystem::open("/information");
+      REQUIRE(directory);
+
+      auto buffer = std::vector<kapi::filesystem::directory_entry>{10};
+      REQUIRE_FALSE(kapi::filesystem::read_directory(*directory, {}, buffer));
+    }
   }
 }
 
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