cp: fix recursive cp fails on files with trailing backslashes

src/uucore/src/lib/features/fs.rs

@@ -696,7 +696,7 @@ pub fn path_ends_with_terminator(path: &Path) -> bool {
     path.as_os_str()
         .as_bytes()
         .last()
-        .is_some_and(|&byte| byte == b'/' || byte == b'\\')
+        .is_some_and(|&byte| byte == b'/')
 }
 
 #[cfg(windows)]
@@ -1053,6 +1053,7 @@ mod tests {
         assert!(path_ends_with_terminator(Path::new("/some/path/")));
 
         // Path ends with a backslash
+        #[cfg(windows)]
         assert!(path_ends_with_terminator(Path::new("C:\\some\\path\\")));
 
         // Path does not end with a terminator
@@ -1064,6 +1065,7 @@ mod tests {
 
         // Root path
         assert!(path_ends_with_terminator(Path::new("/")));
+        #[cfg(windows)]
         assert!(path_ends_with_terminator(Path::new("C:\\")));
     }
 

tests/by-util/test_cp.rs

@@ -7079,3 +7079,14 @@ fn test_cp_no_dereference_symlink_with_parents() {
         .succeeds();
     assert_eq!(at.resolve_link("x/symlink-to-directory"), "directory");
 }
+
+#[test]
+#[cfg(unix)]
+fn test_cp_recursive_files_ending_in_backslash() {
+    let ts = TestScenario::new(util_name!());
+    let at = &ts.fixtures;
+    at.mkdir("a");
+    at.touch("a/foo\\");
+    ts.ucmd().args(&["-r", "a", "b"]).succeeds();
+    assert!(at.file_exists("b/foo\\"));
+}