From 124d7870459d4ede0510a2a5b519f3ba15acf339 Mon Sep 17 00:00:00 2001
From: Misakait <cjl2597588144@gmail.com>
Date: Sat, 4 Oct 2025 17:30:52 +0800
Subject: [PATCH 1/2] fix(ptx): Correct reference format for stdin

---
 src/uu/ptx/src/ptx.rs | 14 +++++++++-----
 1 file changed, 9 insertions(+), 5 deletions(-)

diff --git a/src/uu/ptx/src/ptx.rs b/src/uu/ptx/src/ptx.rs
index f3afc58df..111d74d39 100644
--- a/src/uu/ptx/src/ptx.rs
+++ b/src/uu/ptx/src/ptx.rs
@@ -352,11 +352,15 @@ fn create_word_set(config: &Config, filter: &WordFilter, file_map: &FileMap) ->
 
 fn get_reference(config: &Config, word_ref: &WordRef, line: &str, context_reg: &Regex) -> String {
     if config.auto_ref {
-        format!(
-            "{}:{}",
-            word_ref.filename.maybe_quote(),
-            word_ref.local_line_nr + 1
-        )
+        if word_ref.filename == "-" {
+            format!(":{}", word_ref.local_line_nr + 1)
+        } else {
+            format!(
+                "{}:{}",
+                word_ref.filename.maybe_quote(),
+                word_ref.local_line_nr + 1
+            )
+        }
     } else if config.input_ref {
         let (beg, end) = match context_reg.find(line) {
             Some(x) => (x.start(), x.end()),

From e131d31486f982864307da92c48968a320ccabce Mon Sep 17 00:00:00 2001
From: Misakait <cjl2597588144@gmail.com>
Date: Sat, 4 Oct 2025 17:44:11 +0800
Subject: [PATCH 2/2] test(ptx): Add regression test for stdin reference format

---
 tests/by-util/test_ptx.rs | 20 +++++++++++++++++++-
 1 file changed, 19 insertions(+), 1 deletion(-)

diff --git a/tests/by-util/test_ptx.rs b/tests/by-util/test_ptx.rs
index 7fd40db76..917cd047a 100644
--- a/tests/by-util/test_ptx.rs
+++ b/tests/by-util/test_ptx.rs
@@ -10,7 +10,25 @@ use uutests::new_ucmd;
 fn test_invalid_arg() {
     new_ucmd!().arg("--definitely-invalid").fails_with_code(1);
 }
-
+#[test]
+fn test_reference_format_for_stdin() {
+    let input = "Rust is good language";
+    let expected_output = concat!(
+        r#".xx "" "" "Rust is good language" "" ":1""#,
+        "\n",
+        r#".xx "" "Rust is" "good language" "" ":1""#,
+        "\n",
+        r#".xx "" "Rust" "is good language" "" ":1""#,
+        "\n",
+        r#".xx "" "Rust is good" "language" "" ":1""#,
+        "\n",
+    );
+    new_ucmd!()
+        .args(&["-G", "-A"])
+        .pipe_in(input)
+        .succeeds()
+        .stdout_only(expected_output);
+}
 #[test]
 fn test_tex_format_no_truncation_markers() {
     let input = "Hello world Rust is a fun language";