From e6f389a544a42d0042564d131a45c4b1d312ee00 Mon Sep 17 00:00:00 2001
From: Andreas Kling <awesomekling@gmail.com>
Date: Wed, 6 Mar 2019 20:27:19 +0100
Subject: [PATCH] Kernel: Add two error checks for open() to return EISDIR or
 ENODEV.

---
 Kernel/VirtualFileSystem.cpp | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/Kernel/VirtualFileSystem.cpp b/Kernel/VirtualFileSystem.cpp
index 9465699319..801b207809 100644
--- a/Kernel/VirtualFileSystem.cpp
+++ b/Kernel/VirtualFileSystem.cpp
@@ -189,12 +189,17 @@ RetainPtr<FileDescriptor> VFS::open(const String& path, int& error, int options,
             error = -EACCES;
             return nullptr;
         }
+        if (metadata.is_directory()) {
+            error = -EISDIR;
+            return nullptr;
+        }
     }
 
     if (metadata.is_device()) {
         auto it = m_devices.find(encoded_device(metadata.major_device, metadata.minor_device));
         if (it == m_devices.end()) {
             kprintf("VFS::open: no such device %u,%u\n", metadata.major_device, metadata.minor_device);
+            error = -ENODEV;
             return nullptr;
         }
         auto descriptor = (*it).value->open(error, options);