From e97b668f82ad1a51e1e9352073a3ae51cedfdd34 Mon Sep 17 00:00:00 2001
From: Lukas Oesch <lukasoesch20@gmail.com>
Date: Thu, 26 Mar 2026 20:27:23 +0100
Subject: mount /dev in the rootfs

---
 kernel/src/filesystem/rootfs/rootfs_filesystem.cpp |  9 +++++++--
 kernel/src/filesystem/rootfs/rootfs_inode.cpp      | 17 +++++++++++++++++
 2 files changed, 24 insertions(+), 2 deletions(-)

(limited to 'kernel/src/filesystem')

diff --git a/kernel/src/filesystem/rootfs/rootfs_filesystem.cpp b/kernel/src/filesystem/rootfs/rootfs_filesystem.cpp
index 22b1962..e819fc7 100644
--- a/kernel/src/filesystem/rootfs/rootfs_filesystem.cpp
+++ b/kernel/src/filesystem/rootfs/rootfs_filesystem.cpp
@@ -12,13 +12,18 @@ namespace filesystem::rootfs
 {
   auto rootfs_filesystem::mount(kstd::shared_ptr<devices::device> const & /*device*/) -> int
   {
-    m_root_inode = kstd::make_shared<rootfs_inode>();
+    auto rfs_inode = kstd::make_shared<rootfs_inode>();
+    rfs_inode->add_child("dev");
+    m_root_inode = rfs_inode;
+
     return 0;
   }
 
-  auto rootfs_filesystem::lookup(kstd::shared_ptr<inode> const & /*parent*/, std::string_view /*name*/)
+  auto rootfs_filesystem::lookup(kstd::shared_ptr<inode> const & parent, std::string_view name)
       -> kstd::shared_ptr<inode>
   {
+    if (auto * rfs_inode = static_cast<rootfs_inode *>(parent.get()))
+      return rfs_inode->lookup_child(name);
     return nullptr;
   }
 }  // namespace filesystem::rootfs
diff --git a/kernel/src/filesystem/rootfs/rootfs_inode.cpp b/kernel/src/filesystem/rootfs/rootfs_inode.cpp
index ed057f7..9bbfbce 100644
--- a/kernel/src/filesystem/rootfs/rootfs_inode.cpp
+++ b/kernel/src/filesystem/rootfs/rootfs_inode.cpp
@@ -2,7 +2,13 @@
 
 #include "kernel/filesystem/inode.hpp"
 
+#include <kstd/memory>
+#include <kstd/string>
+
+#include <algorithm>
 #include <cstddef>
+#include <string_view>
+#include <utility>
 
 namespace filesystem::rootfs
 {
@@ -19,4 +25,15 @@ namespace filesystem::rootfs
   {
     return 0;
   }
+
+  auto rootfs_inode::add_child(std::string_view name) -> void
+  {
+    m_children.push_back(std::make_pair(kstd::string{name}, kstd::make_shared<rootfs_inode>()));
+  }
+
+  auto rootfs_inode::lookup_child(std::string_view name) -> kstd::shared_ptr<inode>
+  {
+    auto it = std::ranges::find_if(m_children, [&](auto const & pair) { return pair.first == name; });
+    return (it != m_children.end()) ? it->second : nullptr;
+  }
 }  // namespace filesystem::rootfs
-- 
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