Keep old symlink; expose new symlink_path

Author: RReverser

library/std/src/sys/wasi/ext/fs.rs

@@ -502,11 +502,21 @@ pub fn rename<P: AsRef<Path>, U: AsRef<Path>>(
     )
 }
 
+/// This corresponds to the `path_symlink` syscall.
+pub fn symlink<P: AsRef<Path>, U: AsRef<Path>>(
+    old_path: P,
+    fd: &File,
+    new_path: U,
+) -> io::Result<()> {
+    fd.as_inner()
+        .fd()
+        .symlink(osstr2str(old_path.as_ref().as_ref())?, osstr2str(new_path.as_ref().as_ref())?)
+}
+
 /// Create a symbolic link.
 ///
-/// This is similar to [`std::os::unix::fs::symlink`] and
-/// [`std::os::windows::fs::symlink_file`] and [`symlink_dir`](std::os::windows::fs::symlink_dir)
-/// counterparts.
-pub fn symlink<P: AsRef<Path>, U: AsRef<Path>>(old_path: P, new_path: U) -> io::Result<()> {
+/// This is a convenience API similar to [`std::os::unix::fs::symlink`] and
+/// [`std::os::windows::fs::symlink_file`] and [`symlink_dir`](std::os::windows::fs::symlink_dir).
+pub fn symlink_path<P: AsRef<Path>, U: AsRef<Path>>(old_path: P, new_path: U) -> io::Result<()> {
     crate::sys::fs::symlink(old_path.as_ref(), new_path.as_ref())
 }