SGX target: fix std unit tests

[rust.git] / src / libstd / fs.rs

diff --git a/src/libstd/fs.rs b/src/libstd/fs.rs
index 25f2dd73504ae87619bf4543230af7b3bcfbb6ee..dfff44b88ea784e3598285ca9555f18db0d5255c 100644 (file)
--- a/src/libstd/fs.rs
+++ b/src/libstd/fs.rs
@@ -211,7 +211,7 @@ pub struct DirBuilder {
     recursive: bool,
 }
 
-/// How large a buffer to pre-allocate before reading the entire file.
+/// Indicates how large a buffer to pre-allocate before reading the entire file.
 fn initial_buffer_size(file: &File) -> usize {
     // Allocate one extra byte so the buffer doesn't need to grow before the
     // final `read` call at the end of the file.  Don't worry about `usize`
@@ -1581,7 +1581,8 @@ pub fn rename<P: AsRef<Path>, Q: AsRef<Path>>(from: P, to: Q) -> io::Result<()>
 /// `O_CLOEXEC` is set for returned file descriptors.
 /// On Windows, this function currently corresponds to `CopyFileEx`. Alternate
 /// NTFS streams are copied but only the size of the main stream is returned by
-/// this function.
+/// this function. On MacOS, this function corresponds to `copyfile` with
+/// `COPYFILE_ALL`.
 /// Note that, this [may change in the future][changes].
 ///
 /// [changes]: ../io/index.html#platform-specific-behavior
@@ -2094,7 +2095,7 @@ fn as_inner_mut(&mut self) -> &mut fs_imp::DirBuilder {
     }
 }
 
-#[cfg(all(test, not(any(target_os = "cloudabi", target_os = "emscripten"))))]
+#[cfg(all(test, not(any(target_os = "cloudabi", target_os = "emscripten", target_env = "sgx"))))]
 mod tests {
     use crate::io::prelude::*;
 
@@ -2836,6 +2837,26 @@ fn copy_file_returns_metadata_len() {
         assert_eq!(check!(out_path.metadata()).len(), copied_len);
     }
 
+    #[test]
+    fn copy_file_follows_dst_symlink() {
+        let tmp = tmpdir();
+        if !got_symlink_permission(&tmp) { return };
+
+        let in_path = tmp.join("in.txt");
+        let out_path = tmp.join("out.txt");
+        let out_path_symlink = tmp.join("out_symlink.txt");
+
+        check!(fs::write(&in_path, "foo"));
+        check!(fs::write(&out_path, "bar"));
+        check!(symlink_file(&out_path, &out_path_symlink));
+
+        check!(fs::copy(&in_path, &out_path_symlink));
+
+        assert!(check!(out_path_symlink.symlink_metadata()).file_type().is_symlink());
+        assert_eq!(check!(fs::read(&out_path_symlink)), b"foo".to_vec());
+        assert_eq!(check!(fs::read(&out_path)), b"foo".to_vec());
+    }
+
     #[test]
     fn symlinks_work() {
         let tmpdir = tmpdir();