1 files changed, 78 insertions, 0 deletions
diff --git a/lume-legacy/include/fs/file.h b/lume-legacy/include/fs/file.h
new file mode 100644
index 0000000..9aff1af
--- /dev/null
+++ b/lume-legacy/include/fs/file.h
@@ -0,0 +1,78 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (C) 2026 Richard QIn
+ */
+
+#pragma once
+#include "common/types.h"
+#include "fs/fs.h"
+
+enum FileType
+{
+    FD_NONE,
+    FD_INODE,
+    FD_DEVICE,
+    FD_PIPE
+};
+
+class Pipe;
+
+struct file
+{
+    enum FileType type;
+    int ref;
+    char readable;
+    char writable;
+
+    Pipe *pipe; // pipeline pointer
+    Inode *ip;         // VFS Inode
+    uint32 off;        // Current Offset
+};
+
+class Pipe
+{
+public:
+    static constexpr uint32_t SIZE = 512;
+
+    Pipe() : nread(0), nwrite(0), read_open(true), write_open(true)
+    {
+        lock.init("pipe");
+    }
+
+    // forbid copy
+    Pipe(const Pipe &) = delete;
+    Pipe &operator=(const Pipe &) = delete;
+
+    ~Pipe()
+    {
+        //
+    }
+
+    // creates a pair of connected file objects
+    static int create_pair(struct file **f0, struct file **f1);
+
+    int read(uint64_t addr, int n);
+    int write(uint64_t addr, int n);
+    void close(bool is_writer);
+
+private:
+    Spinlock lock;
+    char data[SIZE];
+    uint32_t nread;  // read
+    uint32_t nwrite; // write
+    bool read_open;
+    bool write_open;
+};
+
+namespace FileTable
+{
+    void init();
+    struct file *alloc();             // Allocate a free file handle
+    struct file *dup(struct file *f); // Duplicate handle (sys_dup)
+    void close(struct file *f);       // Close handle
+
+    int stat(struct file *f, uint64 addr);
+    int read(struct file *f, uint64 addr, int n);
+    int write(struct file *f, uint64 addr, int n);
+    int lseek(struct file *f, int offset, int whence);
+} // namespace FileTable