1 files changed, 55 insertions, 0 deletions
diff --git a/third_party/rust/tokio-fs/src/os/unix.rs b/third_party/rust/tokio-fs/src/os/unix.rs
new file mode 100644
index 0000000000..5f8eedeba3
--- /dev/null
+++ b/third_party/rust/tokio-fs/src/os/unix.rs
@@ -0,0 +1,55 @@
+//! Unix-specific extensions to primitives in the `tokio_fs` module.
+
+use std::io;
+use std::path::Path;
+use std::os::unix::fs;
+
+use futures::{Future, Poll};
+
+/// Creates a new symbolic link on the filesystem.
+///
+/// The `dst` path will be a symbolic link pointing to the `src` path.
+///
+/// This is an async version of [`std::os::unix::fs::symlink`][std]
+///
+/// [std]: https://doc.rust-lang.org/std/os/unix/fs/fn.symlink.html
+pub fn symlink<P: AsRef<Path>, Q: AsRef<Path>>(src: P, dst: Q) -> SymlinkFuture<P, Q> {
+    SymlinkFuture::new(src, dst)
+}
+
+/// Future returned by `symlink`.
+#[derive(Debug)]
+pub struct SymlinkFuture<P, Q>
+where
+    P: AsRef<Path>,
+    Q: AsRef<Path>
+{
+    src: P,
+    dst: Q,
+}
+
+impl<P, Q> SymlinkFuture<P, Q>
+where
+    P: AsRef<Path>,
+    Q: AsRef<Path>
+{
+    fn new(src: P, dst: Q) -> SymlinkFuture<P, Q> {
+        SymlinkFuture {
+            src: src,
+            dst: dst,
+        }
+    }
+}
+
+impl<P, Q> Future for SymlinkFuture<P, Q>
+where
+    P: AsRef<Path>,
+    Q: AsRef<Path>
+{
+    type Item = ();
+    type Error = io::Error;
+
+    fn poll(&mut self) -> Poll<Self::Item, Self::Error> {
+        ::blocking_io(|| fs::symlink(&self.src, &self.dst) )
+    }
+}