From 0f5ac12ad4717de8354f9e2b61423f7cea8c5604 Mon Sep 17 00:00:00 2001
From: Rayhan Faizel <rayhan.faizel@hotmail.com>
Date: Sat, 10 Jun 2023 18:21:13 +0530
Subject: [PATCH] uucore: add function which checks hardlink as well as
 directed symlink

---
 src/uucore/src/lib/features/fs.rs | 30 ++++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)

diff --git a/src/uucore/src/lib/features/fs.rs b/src/uucore/src/lib/features/fs.rs
index 797be9c2cdb..be2419cc3f5 100644
--- a/src/uucore/src/lib/features/fs.rs
+++ b/src/uucore/src/lib/features/fs.rs
@@ -648,6 +648,36 @@ pub fn are_hardlinks_to_same_file(source: &Path, target: &Path) -> bool {
     source_metadata.ino() == target_metadata.ino() && source_metadata.dev() == target_metadata.dev()
 }
 
+#[cfg(not(unix))]
+pub fn are_hardlinks_or_oneway_symlink_to_same_file(source: &Path, target: &Path) -> bool {
+    false
+}
+
+/// Checks if either two paths are hard links to the same file or if the source path is a symbolic link which when fully resolved points to target path
+///
+/// # Arguments
+///
+/// * `source` - A reference to a `Path` representing the source path.
+/// * `target` - A reference to a `Path` representing the target path.
+///
+/// # Returns
+///
+/// * `bool` - Returns `true` if either of above conditions are true, and `false` otherwise.
+#[cfg(unix)]
+pub fn are_hardlinks_or_oneway_symlink_to_same_file(source: &Path, target: &Path) -> bool {
+    let source_metadata = match fs::metadata(source) {
+        Ok(metadata) => metadata,
+        Err(_) => return false,
+    };
+
+    let target_metadata = match fs::symlink_metadata(target) {
+        Ok(metadata) => metadata,
+        Err(_) => return false,
+    };
+
+    source_metadata.ino() == target_metadata.ino() && source_metadata.dev() == target_metadata.dev()
+}
+
 #[cfg(test)]
 mod tests {
     // Note this useful idiom: importing names from outer (for mod tests) scope.