kernel: add directory listing to demo.

1 files changed, 26 insertions, 0 deletions

diff --git a/kernel/kernel/main.cpp b/kernel/kernel/main.cpp
index fd5ac5f1..e22c7ce0 100644
--- a/kernel/kernel/main.cpp
+++ b/kernel/kernel/main.cpp
@@ -20,6 +20,7 @@
 #include <kstd/vector.hpp>
 
 #include <cstddef>
+#include <ranges>
 #include <string_view>
 
 using namespace kstd::units_literals;
@@ -204,6 +205,31 @@ auto run_demo() -> void
     bytes_written = *written;
   }
   kstd::println("--> wrote {} to /dev/zero", bytes_written);
+
+  auto fd_7 = kapi::filesystem::open("/dev");
+  if (fd_7)
+  {
+    kstd::println("--> successfully opened /dev as a file with file descriptor {}", fd_7.value());
+  }
+  else
+  {
+    kapi::system::panic("demo failed");
+  }
+
+  auto devices = kstd::vector<kapi::filesystem::directory_entry>{10};
+  auto entries_read = kapi::filesystem::read_directory(*fd_7, devices);
+  if (entries_read)
+  {
+    kstd::println("--> successfully got directory entries:");
+    for (auto const & entry : std::ranges::subrange(devices.cbegin(), devices.cbegin() + *entries_read))
+    {
+      kstd::println("\t{}", entry.name);
+    }
+  }
+  else
+  {
+    kapi::system::panic("demo failed");
+  }
 }
 
 auto main() -> int