added rs485 checks to set_on_file and get_from_file

src/sys/unix/mod.rs

@@ -54,22 +54,30 @@ cfg_if! {
 		#[derive(Clone)]
 		pub struct Settings {
 			pub termios: RawTermios,
+			pub rs485: Option<rs485::SerialRs485>,
 		}
 
 		impl Settings {
 			fn get_from_file(file: &std::fs::File) -> std::io::Result<Self> {
 				unsafe {
 					let mut termios = std::mem::zeroed();
 					check(libc::ioctl(file.as_raw_fd(), libc::TCGETS2 as _, &mut termios))?;
-					Ok(Settings { termios })
+					if let Ok(rs485) = rs485::SerialRs485::from_fd(file.as_raw_fd()) {
+						Ok(Settings { termios, rs485: Some(rs485)})
+					} else {
+						Ok(Settings { termios, rs485: None}
+					}
 				}
 			}
 
 			fn set_on_file(&self, file: &mut std::fs::File) -> std::io::Result<()> {
 				unsafe {
 					check(libc::ioctl(file.as_raw_fd(), libc::TCSETSW2 as _, &self.termios))?;
-					Ok(())
 				}
+				if let Some(rs485) = self.rs485 {
+					rs485.set_on_fd(file.as_raw_fd())?;
+				}
+				Ok(())
 			}
 		}
 	} else {
@@ -405,6 +413,12 @@ impl Settings {
 		rs485.set_enabled(true);
 		self.rs485 = Some(rs485);
 	}
+	pub fn get_rs485(&self) -> Option<rs485::SerialRs485> {
+		self.rs485
+	}
+	pub fn set_rs485(&mut self, rs485: rs485::SerialRs485) {
+		self.rs485 = Some(rs485);
+	}
 	pub fn set_raw(&mut self) {
 		unsafe {
 			libc::cfmakeraw(&mut self.termios as *mut _ as *mut libc::termios);