Fix compilation issues on other unixes

Signed-off-by: Alex Saveau <saveau.alexandre@gmail.com>

library/std/src/sys/pal/unix/fs.rs

@@ -1980,14 +1980,62 @@ fn open_to_and_set_permissions(
     Ok((writer, writer_metadata))
 }
 
+mod cfm {
+    use crate::fs::{File, Metadata};
+    use crate::io::{BorrowedCursor, IoSlice, IoSliceMut, Read, Result, Write};
+
+    #[allow(dead_code)]
+    pub struct CachedFileMetadata(pub File, pub Metadata);
+
+    impl Read for CachedFileMetadata {
+        fn read(&mut self, buf: &mut [u8]) -> Result<usize> {
+            self.0.read(buf)
+        }
+        fn read_vectored(&mut self, bufs: &mut [IoSliceMut<'_>]) -> Result<usize> {
+            self.0.read_vectored(bufs)
+        }
+        fn read_buf(&mut self, cursor: BorrowedCursor<'_>) -> Result<()> {
+            self.0.read_buf(cursor)
+        }
+        #[inline]
+        fn is_read_vectored(&self) -> bool {
+            self.0.is_read_vectored()
+        }
+        fn read_to_end(&mut self, buf: &mut Vec<u8>) -> Result<usize> {
+            self.0.read_to_end(buf)
+        }
+        fn read_to_string(&mut self, buf: &mut String) -> Result<usize> {
+            self.0.read_to_string(buf)
+        }
+    }
+    impl Write for CachedFileMetadata {
+        fn write(&mut self, buf: &[u8]) -> Result<usize> {
+            self.0.write(buf)
+        }
+        fn write_vectored(&mut self, bufs: &[IoSlice<'_>]) -> Result<usize> {
+            self.0.write_vectored(bufs)
+        }
+        #[inline]
+        fn is_write_vectored(&self) -> bool {
+            self.0.is_write_vectored()
+        }
+        #[inline]
+        fn flush(&mut self) -> Result<()> {
+            self.0.flush()
+        }
+    }
+}
+#[cfg(any(target_os = "linux", target_os = "android"))]
+pub(crate) use cfm::CachedFileMetadata;
+
 #[cfg(not(target_vendor = "apple"))]
 pub fn copy(from: &Path, to: &Path) -> io::Result<u64> {
     let (reader, reader_metadata) = open_from(from)?;
     let (writer, writer_metadata) = open_to_and_set_permissions(to, &reader_metadata)?;
 
     io::copy(
-        &mut crate::sys::kernel_copy::CachedFileMetadata(reader, reader_metadata),
-        &mut crate::sys::kernel_copy::CachedFileMetadata(writer, writer_metadata),
+        &mut cfm::CachedFileMetadata(reader, reader_metadata),
+        &mut cfm::CachedFileMetadata(writer, writer_metadata),
     )
 }
 

library/std/src/sys/pal/unix/kernel_copy.rs

@@ -52,8 +52,8 @@ use crate::cmp::min;
 use crate::fs::{File, Metadata};
 use crate::io::copy::generic_copy;
 use crate::io::{
-    BorrowedCursor, BufRead, BufReader, BufWriter, Error, IoSlice, IoSliceMut, Read, Result,
-    StderrLock, StdinLock, StdoutLock, Take, Write,
+    BufRead, BufReader, BufWriter, Error, Read, Result, StderrLock, StdinLock, StdoutLock, Take,
+    Write,
 };
 use crate::mem::ManuallyDrop;
 use crate::net::TcpStream;
@@ -65,6 +65,7 @@ use crate::process::{ChildStderr, ChildStdin, ChildStdout};
 use crate::ptr;
 use crate::sync::atomic::{AtomicBool, AtomicU8, Ordering};
 use crate::sys::cvt;
+use crate::sys::fs::CachedFileMetadata;
 use crate::sys::weak::syscall;
 
 #[cfg(test)]
@@ -537,46 +538,6 @@ impl<T: ?Sized + CopyWrite> CopyWrite for BufWriter<T> {
     }
 }
 
-pub(crate) struct CachedFileMetadata(pub File, pub Metadata);
-
-impl Read for CachedFileMetadata {
-    fn read(&mut self, buf: &mut [u8]) -> Result<usize> {
-        self.0.read(buf)
-    }
-    fn read_vectored(&mut self, bufs: &mut [IoSliceMut<'_>]) -> Result<usize> {
-        self.0.read_vectored(bufs)
-    }
-    fn read_buf(&mut self, cursor: BorrowedCursor<'_>) -> Result<()> {
-        self.0.read_buf(cursor)
-    }
-    #[inline]
-    fn is_read_vectored(&self) -> bool {
-        self.0.is_read_vectored()
-    }
-    fn read_to_end(&mut self, buf: &mut Vec<u8>) -> Result<usize> {
-        self.0.read_to_end(buf)
-    }
-    fn read_to_string(&mut self, buf: &mut String) -> Result<usize> {
-        self.0.read_to_string(buf)
-    }
-}
-impl Write for CachedFileMetadata {
-    fn write(&mut self, buf: &[u8]) -> Result<usize> {
-        self.0.write(buf)
-    }
-    fn write_vectored(&mut self, bufs: &[IoSlice<'_>]) -> Result<usize> {
-        self.0.write_vectored(bufs)
-    }
-    #[inline]
-    fn is_write_vectored(&self) -> bool {
-        self.0.is_write_vectored()
-    }
-    #[inline]
-    fn flush(&mut self) -> Result<()> {
-        self.0.flush()
-    }
-}
-
 impl CopyRead for CachedFileMetadata {
     fn properties(&self) -> CopyParams {
         CopyParams(FdMeta::Metadata(self.1.clone()), Some(self.0.as_raw_fd()))