unix ExitStatus: Provide .into_raw()

Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>

library/std/src/sys/unix/ext/process.rs

@@ -175,6 +175,10 @@ pub trait ExitStatusExt {
     /// Ie, if `WIFSIGNALED`, this returns `WTERMSIG`.
     #[stable(feature = "rust1", since = "1.0.0")]
     fn signal(&self) -> Option<i32>;
+
+    /// Returns the underlying raw `wait` status.
+    #[unstable(feature = "unix_process_wait_more", issue = "none")]
+    fn into_raw(self) -> i32;
 }
 
 #[stable(feature = "rust1", since = "1.0.0")]
@@ -186,6 +190,10 @@ impl ExitStatusExt for process::ExitStatus {
     fn signal(&self) -> Option<i32> {
         self.as_inner().signal()
     }
+
+    fn into_raw(self) -> i32 {
+        self.as_inner().into_raw().into()
+    }
 }
 
 #[stable(feature = "process_extensions", since = "1.2.0")]

library/std/src/sys/unix/process/process_unix.rs

@@ -481,6 +481,10 @@ impl ExitStatus {
     pub fn signal(&self) -> Option<i32> {
         if libc::WIFSIGNALED(self.0) { Some(libc::WTERMSIG(self.0)) } else { None }
     }
+
+    pub fn into_raw(&self) -> c_int {
+        self.0
+    }
 }
 
 /// Converts a raw `c_int` to a type-safe `ExitStatus` by wrapping it without copying.