modified some syscall code in rlibc, fs stuff

kernel/vfs.h

@@ -0,0 +1,30 @@
+#ifndef KVFS_H
+#define KVFS_H
+
+#include <stdint.h>
+
+#define VFS_FILE      0x01
+#define VFS_DIRECTORY 0x02
+
+struct vfs_node;
+
+typedef uint32_t (*read_type_t)(struct vfs_node* node, uint32_t offset, uint32_t size, uint8_t* buffer);
+typedef uint32_t (*write_type_t)(struct vfs_node* node, uint32_t offset, uint32_t size, uint8_t* buffer);
+typedef struct vfs_node* (*finddir_type_t)(struct vfs_node* node, const char* name);
+
+typedef struct vfs_node {
+    char name[128];
+    uint32_t flags;       // File, directory, device, etc.
+    uint32_t size;        // Size of file in bytes
+    uint32_t inode;       // Unique identifier managed by the specific filesystem
+    
+    read_type_t read;
+    write_type_t write;
+    finddir_type_t finddir; 
+
+    struct vfs_node* mount;
+} vfs_node_t;
+
+void vfs_create_root();
+
+#endif