Initial Upload

file.h

@@ -0,0 +1,37 @@
+struct file {
+    enum { FD_NONE, FD_PIPE, FD_INODE } type;
+    int ref; // reference count
+    char readable;
+    char writable;
+    struct pipe *pipe;
+    struct inode *ip;
+    uint off;
+};
+
+
+// in-memory copy of an inode
+struct inode {
+    uint dev;           // Device number
+    uint inum;          // Inode number
+    int ref;            // Reference count
+    struct sleeplock lock; // protects everything below here
+    int valid;          // inode has been read from disk?
+
+    short type;         // copy of disk inode
+    short major;
+    short minor;
+    short nlink;
+    uint size;
+    uint addrs[NDIRECT + 1];
+};
+
+// table mapping major device number to
+// device functions
+struct devsw {
+    int (*read)(struct inode*, char*, int);
+    int (*write)(struct inode*, char*, int);
+};
+
+extern struct devsw devsw[];
+
+#define CONSOLE 1