Orbital (#16)

* Port previous ethernet scheme

* Add ipd

* Fix initfs rebuilds, use QEMU user networking addresses in ipd

* Add tcp/udp, netutils, dns, and network config

* Add fsync to network driver

* Add dns, router, subnet by default

* Fix e1000 driver. Make ethernet and IP non-blocking to avoid deadlocks

* Add orbital server, WIP

* Add futex

* Add orbutils and orbital

* Update libstd, orbutils, and orbital
Move ANSI key encoding to vesad

* Add orbital assets

* Update orbital

* Update to add login manager

* Add blocking primitives, block for most things except waitpid, update orbital

* Wait in waitpid and IRQ, improvements for other waits

* Fevent in root scheme

* WIP: Switch to using fevent

* Reorganize

* Event based e1000d driver

* Superuser-only access to some network schemes, display, and disk

* Superuser root and irq schemes

* Fix orbital

drivers/vesad/src/screen/mod.rs

@@ -1,10 +1,30 @@
 pub use self::graphic::GraphicScreen;
 pub use self::text::TextScreen;
 
+use orbclient::Event;
+use syscall::Result;
+
 mod graphic;
 mod text;
 
-pub enum Screen {
-    Graphic(GraphicScreen),
-    Text(TextScreen)
+pub trait Screen {
+    fn width(&self) -> usize;
+
+    fn height(&self) -> usize;
+
+    fn event(&mut self, flags: usize) -> Result<usize>;
+
+    fn input(&mut self, event: &Event);
+
+    fn read(&mut self, buf: &mut [u8]) -> Result<usize>;
+
+    fn will_block(&self) -> bool;
+
+    fn write(&mut self, buf: &[u8], sync: bool) -> Result<usize>;
+
+    fn seek(&mut self, pos: usize, whence: usize) -> Result<usize>;
+
+    fn sync(&mut self);
+
+    fn redraw(&mut self);
 }