Add seek function

Cargo.lock

@@ -25,9 +25,12 @@ checksum = "dc827186963e592360843fb5ba4b973e145841266c1357f7180c43526f2e5b61"
 
 [[package]]
 name = "bitflags"
-version = "2.5.0"
+version = "2.6.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "cf4b9d6a944f767f8e5e0db018570623c85f3d925ac718db4e06d0187adb21c1"
+checksum = "b048fb63fd8b5923fc5aa7b340d8e156aec7ec02f0c78fa8a6ddc2613f6f71de"
+dependencies = [
+ "serde",
+]
 
 [[package]]
 name = "byteorder"
@@ -101,6 +104,7 @@ checksum = "ef1a6892d9eef45c8fa6b9e0086428a2cca8491aca8f787c534a3d6d0bcb3ced"
 name = "file_rpc"
 version = "0.1.0"
 dependencies = [
+ "bitflags",
  "parking_lot",
  "postcard",
  "serde",

src/main.rs

@@ -39,13 +39,12 @@ impl file_rpc::Server for FileServ {
     fn read(
         &self,
         _fd: u64,
-        _pos: u64,
         _len: usize,
     ) -> std::result::Result<std::borrow::Cow<'_, [u8]>, ()> {
         Err(())
     }
 
-    fn write(&self, _fd: u64, _pos: u64, data: &[u8]) -> Result<(), ()> {
+    fn write(&self, _fd: u64, data: &[u8]) -> Result<(), ()> {
         let mut uart = self.0.lock();
         for &byte in data {
             while !uart.read_line_status().contains(LineStatus::TRANSMIT_EMPTY) {}
@@ -63,6 +62,8 @@ impl file_rpc::Server for FileServ {
     fn dup(&self, fd: u64) -> Option<u64> {
         Some(fd)
     }
+
+    fn seek(&self, _fd: u64, _pos: file_rpc::SeekFrom) -> u64 { 0 }
 }
 
 fn main() {