From 4dd148f07c64fbcaad05d83813feb54ccafdee33 Mon Sep 17 00:00:00 2001
From: Andreas Kling <kling@serenityos.org>
Date: Sun, 27 Nov 2022 23:50:28 +0100
Subject: [PATCH] Kernel: Add File::is_regular_file()

This makes it easy and expressive to check if a File is a regular file.
---
 Kernel/FileSystem/File.h        | 2 ++
 Kernel/FileSystem/InodeFile.cpp | 5 +++++
 Kernel/FileSystem/InodeFile.h   | 2 ++
 3 files changed, 9 insertions(+)

diff --git a/Kernel/FileSystem/File.h b/Kernel/FileSystem/File.h
index 9b2a4bb817..4e1145bdae 100644
--- a/Kernel/FileSystem/File.h
+++ b/Kernel/FileSystem/File.h
@@ -115,6 +115,8 @@ public:
     virtual bool is_socket() const { return false; }
     virtual bool is_inode_watcher() const { return false; }
 
+    virtual bool is_regular_file() const { return false; }
+
     virtual FileBlockerSet& blocker_set() { return m_blocker_set; }
 
     size_t attach_count() const { return m_attach_count; }
diff --git a/Kernel/FileSystem/InodeFile.cpp b/Kernel/FileSystem/InodeFile.cpp
index f32823d9b3..d1406b51b0 100644
--- a/Kernel/FileSystem/InodeFile.cpp
+++ b/Kernel/FileSystem/InodeFile.cpp
@@ -120,4 +120,9 @@ ErrorOr<void> InodeFile::chmod(Credentials const& credentials, OpenFileDescripti
     return VirtualFileSystem::the().chmod(credentials, *description.custody(), mode);
 }
 
+bool InodeFile::is_regular_file() const
+{
+    return inode().metadata().is_regular_file();
+}
+
 }
diff --git a/Kernel/FileSystem/InodeFile.h b/Kernel/FileSystem/InodeFile.h
index 5da7cbdce5..4336166c3f 100644
--- a/Kernel/FileSystem/InodeFile.h
+++ b/Kernel/FileSystem/InodeFile.h
@@ -49,6 +49,8 @@ public:
     virtual bool is_inode() const override { return true; }
 
 private:
+    virtual bool is_regular_file() const override;
+
     explicit InodeFile(NonnullLockRefPtr<Inode>&&);
     NonnullLockRefPtr<Inode> m_inode;
 };