diff --git a/library/std/src/os/yggdrasil/io.rs b/library/std/src/os/yggdrasil/io.rs
index bbbf753f01e..c42ed223ba1 100644
--- a/library/std/src/os/yggdrasil/io.rs
+++ b/library/std/src/os/yggdrasil/io.rs
@@ -1,6 +1,64 @@
 #![stable(feature = "os_fd", since = "1.66.0")]
 #![allow(dead_code)]
 
+use crate::mem::MaybeUninit;
+use crate::sys::cvt_io;
+use yggdrasil_rt::sys as syscall;
+
+#[unstable(feature = "yggdrasil_os", issue = "none")]
+pub use yggdrasil_rt::io::{
+    DeviceRequest, TerminalInputOptions, TerminalLineOptions, TerminalOptions,
+    TerminalOutputOptions,
+};
+
+#[unstable(feature = "yggdrasil_os", issue = "none")]
+pub trait FdDeviceRequest {
+    #[unstable(feature = "yggdrasil_os", issue = "none")]
+    unsafe fn device_request(&self, req: &mut DeviceRequest) -> crate::io::Result<()>;
+}
+
+#[unstable(feature = "yggdrasil_os", issue = "none")]
+impl<T: AsRawFd> FdDeviceRequest for T {
+    unsafe fn device_request(&self, req: &mut DeviceRequest) -> crate::io::Result<()> {
+        cvt_io(syscall::device_request(self.as_raw_fd(), req))?;
+        Ok(())
+    }
+}
+
+#[unstable(feature = "yggdrasil_os", issue = "none")]
+pub unsafe fn set_terminal_options<F: raw::AsRawFd>(
+    fd: F,
+    opt: TerminalOptions,
+) -> crate::io::Result<()> {
+    let mut req = DeviceRequest::SetTerminalOptions(opt);
+    cvt_io(syscall::device_request(fd.as_raw_fd(), &mut req))
+}
+
+#[unstable(feature = "yggdrasil_os", issue = "none")]
+pub unsafe fn get_terminal_options<F: raw::AsRawFd>(fd: F) -> crate::io::Result<TerminalOptions> {
+    let mut req = DeviceRequest::GetTerminalOptions(MaybeUninit::uninit());
+    cvt_io(syscall::device_request(fd.as_raw_fd(), &mut req))?;
+    let DeviceRequest::GetTerminalOptions(opt) = req else {
+        unreachable!();
+    };
+    Ok(opt.assume_init())
+}
+
+#[unstable(feature = "yggdrasil_os", issue = "none")]
+pub unsafe fn update_terminal_options<
+    F: raw::AsRawFd,
+    M: Fn(TerminalOptions) -> TerminalOptions,
+>(
+    fd: F,
+    mutator: M,
+) -> crate::io::Result<TerminalOptions> {
+    let fd = fd.as_raw_fd();
+    let old = get_terminal_options(fd)?;
+    let new = mutator(old);
+    set_terminal_options(fd, new)?;
+    Ok(old)
+}
+
 mod net {
     use crate::os::yggdrasil::io::OwnedFd;
     use crate::os::yggdrasil::io::{AsRawFd, FromRawFd, IntoRawFd, RawFd};
@@ -49,10 +107,31 @@ mod net {
     impl_into_raw_fd! { TcpStream TcpListener UdpSocket }
 }
 
-pub mod raw {
+#[stable(feature = "os_fd", since = "1.66.0")]
+pub(crate) mod raw {
     #[stable(feature = "rust1", since = "1.0.0")]
     pub type RawFd = yggdrasil_rt::io::RawFd;
 
+    macro_rules! stdio_impl_as_raw_fd {
+        ($($ty:ty => $n:expr),*) => {$(
+            #[stable(feature = "asraw_stdio", since = "1.21.0")]
+            impl AsRawFd for $ty {
+                #[inline]
+                fn as_raw_fd(&self) -> RawFd {
+                    $n
+                }
+            }
+
+            #[stable(feature = "asraw_stdio", since = "1.21.0")]
+            impl AsRawFd for &$ty {
+                #[inline]
+                fn as_raw_fd(&self) -> RawFd {
+                    $n
+                }
+            }
+        )*};
+    }
+
     #[stable(feature = "rust1", since = "1.0.0")]
     pub trait AsRawFd {
         #[stable(feature = "rust1", since = "1.0.0")]
@@ -91,6 +170,12 @@ pub mod raw {
             self
         }
     }
+
+    stdio_impl_as_raw_fd!(
+        crate::io::Stdin => RawFd::STDIN,
+        crate::io::Stdout => RawFd::STDOUT,
+        crate::io::Stderr => RawFd::STDERR
+    );
 }
 
 pub mod owned {
diff --git a/library/std/src/os/yggdrasil/mod.rs b/library/std/src/os/yggdrasil/mod.rs
index f506d401c8a..4fd27ad26e7 100644
--- a/library/std/src/os/yggdrasil/mod.rs
+++ b/library/std/src/os/yggdrasil/mod.rs
@@ -1,6 +1,6 @@
 #![stable(feature = "os", since = "1.0.0")]
 
-pub(crate) mod io;
+pub mod io;
 pub mod process;
 
 #[unstable(feature = "yggdrasil_raw_fd", issue = "none")]
diff --git a/library/std/src/sys/yggdrasil/process.rs b/library/std/src/sys/yggdrasil/process.rs
index 349ec989060..ebff85e0694 100644
--- a/library/std/src/sys/yggdrasil/process.rs
+++ b/library/std/src/sys/yggdrasil/process.rs
@@ -321,7 +321,7 @@ impl Command {
 
         let options = SpawnOptions { program, arguments, environment, optional: &optional };
 
-        let pid = cvt_io(unsafe { yggdrasil_rt::sys::spawn(&options) })?;
+        let pid = cvt_io(unsafe { yggdrasil_rt::sys::spawn_process(&options) })?;
 
         Ok(Process { pid })
     }
diff --git a/yggdrasil-rt b/yggdrasil-rt
index a882ffa0281..f00ecdb926c 160000
--- a/yggdrasil-rt
+++ b/yggdrasil-rt
@@ -1 +1 @@
-Subproject commit a882ffa0281db2fdf162db7bf6a979a2bbbd54a0
+Subproject commit f00ecdb926c2f912d658589f9f631100e41ad6c5