cp: Added error handling on printing debug message

src/uu/cp/src/cp.rs

@@ -28,7 +28,7 @@ use thiserror::Error;
 
 use platform::copy_on_write;
 use uucore::display::Quotable;
-use uucore::error::{UError, UResult, UUsageError, set_exit_code};
+use uucore::error::{UError, UResult, UUsageError, set_exit_code, strip_errno};
 use uucore::fs::{
     FileInformation, MissingHandling, ResolveMode, are_hardlinks_to_same_file, canonicalize,
     get_filename, is_symlink_loop, normalize_path, path_ends_with_terminator,
@@ -446,11 +446,18 @@ impl Display for SparseDebug {
 /// This function prints the debug information of a file copy operation if
 /// no hard link or symbolic link is required, and data copy is required.
 /// It prints the debug information of the offload, reflink, and sparse detection actions.
-fn show_debug(copy_debug: &CopyDebug) {
-    println!(
-        "{}",
-        translate!("cp-debug-copy-offload", "offload" => copy_debug.offload, "reflink" => copy_debug.reflink, "sparse" => copy_debug.sparse_detection)
-    );
+fn show_debug(copy_debug: &CopyDebug) -> io::Result<()> {
+    use std::io::Write;
+
+    let debug_string = translate!("cp-debug-copy-offload", "offload" => copy_debug.offload, "reflink" => copy_debug.reflink, "sparse" => copy_debug.sparse_detection);
+
+    let stdout = io::stdout();
+    let mut stdout = stdout.lock();
+
+    stdout.write_all(debug_string.as_bytes())?;
+    stdout.flush()?;
+
+    Ok(())
 }
 
 static EXIT_ERR: i32 = 1;
@@ -1359,7 +1366,7 @@ fn show_error_if_needed(error: &CpError) {
         // Format IoErrContext using strip_errno to remove "(os error N)" suffix
         // for GNU-compatible output
         CpError::IoErrContext(io_err, context) => {
-            show_error!("{context}: {}", uucore::error::strip_errno(io_err));
+            show_error!("{context}: {}", strip_errno(io_err));
         }
         _ => {
             show_error!("{error}");
@@ -2813,7 +2820,8 @@ fn copy_helper(
         )?;
 
         if !options.attributes_only && options.debug {
-            show_debug(&copy_debug);
+            show_debug(&copy_debug)
+                .map_err(|e| CpError::IoErrContext(e, translate!("cp-error-write")))?;
         }
     }