From 4f64372dd6ac6086bc38c01a2d56cabf6adf42cc Mon Sep 17 00:00:00 2001
From: arbelonson-source <269032023+arbelonson-source@users.noreply.github.com>
Date: Mon, 31 Aug 2026 09:54:47 +0300
Subject: [PATCH] stat: accept a hyphen-leading --format/--printf/-c value

--format (-c) and --printf's value was rejected as an unrecognized
flag when given as its own argument (stat --format -%n f, not the
attached -c-%n or --format=-%n): the Args were missing
allow_hyphen_values, the same gap already fixed this session for
several other options. GNU's own stat accepts any argument as the
format string regardless of its first character.

AI-assisted-by: Claude Opus 5, via Claude Code
---
 src/uu/stat/src/stat.rs    |  4 +++-
 tests/by-util/test_stat.rs | 19 +++++++++++++++++++
 2 files changed, 22 insertions(+), 1 deletion(-)

diff --git a/src/uu/stat/src/stat.rs b/src/uu/stat/src/stat.rs
index 3dd2b421d70..45817649c73 100644
--- a/src/uu/stat/src/stat.rs
+++ b/src/uu/stat/src/stat.rs
@@ -1540,12 +1540,14 @@ pub fn uu_app() -> Command {
                 .short('c')
                 .long(options::FORMAT)
                 .help(translate!("stat-help-format"))
-                .value_name("FORMAT"),
+                .value_name("FORMAT")
+                .allow_hyphen_values(true),
         )
         .arg(
             Arg::new(options::PRINTF)
                 .long(options::PRINTF)
                 .value_name("FORMAT")
+                .allow_hyphen_values(true)
                 .help(translate!("stat-help-printf")),
         )
         .arg(
diff --git a/tests/by-util/test_stat.rs b/tests/by-util/test_stat.rs
index b64b850a6aa..ab51bcab5c7 100644
--- a/tests/by-util/test_stat.rs
+++ b/tests/by-util/test_stat.rs
@@ -25,6 +25,25 @@ fn test_invalid_option() {
     new_ucmd!().arg("-w").arg("-q").arg("/").fails();
 }
 
+#[test]
+fn test_format_hyphen_leading_as_separate_arg() {
+    // A hyphen-leading format string passed as its own argument (not
+    // attached with `=`) must not be mistaken for a new, unrecognized
+    // flag.
+    new_ucmd!()
+        .args(&["--format", "-%n", "/"])
+        .succeeds()
+        .stdout_is("-/\n");
+    new_ucmd!()
+        .args(&["--printf", "-%n", "/"])
+        .succeeds()
+        .stdout_is("-/");
+    new_ucmd!()
+        .args(&["-c", "-%n", "/"])
+        .succeeds()
+        .stdout_is("-/\n");
+}
+
 #[cfg(unix)]
 const NORMAL_FORMAT_STR: &str =
     "%a %A %b %B %d %D %f %F %g %G %h %i %m %n %o %s %u %U %x %X %y %Y %z %Z"; // avoid "%w %W" (birth/creation) due to `stat` limitations and linux kernel & rust version capability variations