add support of RustyHermit's BSD socket layer

RustHermit publishs a new kernel interface and supports
a common BSD socket layer. By supporting this interface,
the implementation can be harmonized to other operating systems.

To realize this socket layer, the handling of file descriptors
is also harmonized to other operating systems.

1 files changed, 6 insertions, 0 deletions

diff --git a/library/std/src/os/hermit/io.rs b/library/std/src/os/hermit/io.rs
new file mode 100644
index 00000000000..d8c741f7f4e
--- /dev/null
+++ b/library/std/src/os/hermit/io.rs
@@ -0,0 +1,6 @@
+#![stable(feature = "rust1", since = "1.0.0")]
+
+use hermit_abi as abi;
+
+#[stable(feature = "rust1", since = "1.0.0")]
+pub type RawFd = abi::FileDescriptor;