Merge pull request #4 from Richard-Qin-001/dev/shell

Rebuilt the system's underlying structure; it is now stable enough to merge. 

The system now supports a read-only file system and has a simple shell implemented.

1 files changed, 36 insertions, 0 deletions

diff --git a/include/fs/file.h b/include/fs/file.h
new file mode 100644
index 0000000..2f23176
--- /dev/null
+++ b/include/fs/file.h
@@ -0,0 +1,36 @@
+#pragma once
+#include "common/types.h"
+#include "fs/fs.h"
+
+enum FileType
+{
+    FD_NONE,
+    FD_INODE,
+    FD_DEVICE,
+    FD_PIPE
+};
+
+struct file
+{
+    enum FileType type;
+    int ref;
+    char readable;
+    char writable;
+
+    struct pipe *pipe; // pipeline pointer
+    Inode *ip;         // VFS Inode
+    uint32 off;        // Current Offset
+};
+
+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