Factor out a common `RawFd`/`AsRawFd`/etc for Unix and WASI.

1 files changed, 49 insertions, 1 deletions

diff --git a/library/std/src/os/unix/process.rs b/library/std/src/os/unix/process.rs
index f2e8832cc92..650dcbabbae 100644
--- a/library/std/src/os/unix/process.rs
+++ b/library/std/src/os/unix/process.rs
@@ -4,7 +4,7 @@
 
 use crate::ffi::OsStr;
 use crate::io;
-use crate::os::unix::io::{AsRawFd, FromRawFd, IntoRawFd, OwnedFd, RawFd};
+use crate::os::unix::io::{AsFd, AsRawFd, BorrowedFd, FromRawFd, IntoRawFd, OwnedFd, RawFd};
 use crate::process;
 use crate::sealed::Sealed;
 use crate::sys;
@@ -385,6 +385,54 @@ impl IntoRawFd for process::ChildStderr {
     }
 }
 
+#[unstable(feature = "io_safety", issue = "87074")]
+impl AsFd for crate::process::ChildStdin {
+    #[inline]
+    fn as_fd(&self) -> BorrowedFd<'_> {
+        self.as_inner().as_fd()
+    }
+}
+
+#[unstable(feature = "io_safety", issue = "87074")]
+impl From<crate::process::ChildStdin> for OwnedFd {
+    #[inline]
+    fn from(child_stdin: crate::process::ChildStdin) -> OwnedFd {
+        child_stdin.into_inner().into_inner().into_inner()
+    }
+}
+
+#[unstable(feature = "io_safety", issue = "87074")]
+impl AsFd for crate::process::ChildStdout {
+    #[inline]
+    fn as_fd(&self) -> BorrowedFd<'_> {
+        self.as_inner().as_fd()
+    }
+}
+
+#[unstable(feature = "io_safety", issue = "87074")]
+impl From<crate::process::ChildStdout> for OwnedFd {
+    #[inline]
+    fn from(child_stdout: crate::process::ChildStdout) -> OwnedFd {
+        child_stdout.into_inner().into_inner().into_inner()
+    }
+}
+
+#[unstable(feature = "io_safety", issue = "87074")]
+impl AsFd for crate::process::ChildStderr {
+    #[inline]
+    fn as_fd(&self) -> BorrowedFd<'_> {
+        self.as_inner().as_fd()
+    }
+}
+
+#[unstable(feature = "io_safety", issue = "87074")]
+impl From<crate::process::ChildStderr> for OwnedFd {
+    #[inline]
+    fn from(child_stderr: crate::process::ChildStderr) -> OwnedFd {
+        child_stderr.into_inner().into_inner().into_inner()
+    }
+}
+
 /// Returns the OS-assigned process identifier associated with this process's parent.
 #[stable(feature = "unix_ppid", since = "1.27.0")]
 pub fn parent_id() -> u32 {