From 524be6e4ae9f864f07b4662b17114d3cb7bdfe00 Mon Sep 17 00:00:00 2001
From: Haisham <47662901+m-haisham@users.noreply.github.com>
Date: Sun, 14 Apr 2024 22:46:00 +0500
Subject: [PATCH] kill: accept all casings for signal names in --list

---
 src/uu/kill/src/kill.rs    |  4 +++-
 tests/by-util/test_kill.rs | 19 +++++++++++++++++++
 2 files changed, 22 insertions(+), 1 deletion(-)

diff --git a/src/uu/kill/src/kill.rs b/src/uu/kill/src/kill.rs
index 9ea51694d..110e8a7a6 100644
--- a/src/uu/kill/src/kill.rs
+++ b/src/uu/kill/src/kill.rs
@@ -154,7 +154,9 @@ fn table() {
 
 fn print_signal(signal_name_or_value: &str) -> UResult<()> {
     for (value, &signal) in ALL_SIGNALS.iter().enumerate() {
-        if signal == signal_name_or_value || (format!("SIG{signal}")) == signal_name_or_value {
+        if signal.eq_ignore_ascii_case(signal_name_or_value)
+            || format!("SIG{signal}").eq_ignore_ascii_case(signal_name_or_value)
+        {
             println!("{value}");
             return Ok(());
         } else if signal_name_or_value == value.to_string() {
diff --git a/tests/by-util/test_kill.rs b/tests/by-util/test_kill.rs
index 5393d163a..73b98f218 100644
--- a/tests/by-util/test_kill.rs
+++ b/tests/by-util/test_kill.rs
@@ -116,6 +116,25 @@ fn test_kill_list_one_signal_from_name() {
         .stdout_matches(&Regex::new("\\b9\\b").unwrap());
 }
 
+#[test]
+fn test_kill_list_one_signal_ignore_case() {
+    // Use SIGKILL because it is 9 on all unixes.
+    new_ucmd!()
+        .arg("-l")
+        .arg("KiLl")
+        .succeeds()
+        .stdout_matches(&Regex::new("\\b9\\b").unwrap());
+}
+
+#[test]
+fn test_kill_list_unknown_must_match_input_case() {
+    new_ucmd!()
+        .arg("-l")
+        .arg("IaMnOtAsIgNaL") // spell-checker:disable-line
+        .fails()
+        .stderr_contains("IaMnOtAsIgNaL"); // spell-checker:disable-line
+}
+
 #[test]
 fn test_kill_list_all_vertically() {
     // Check for a few signals.  Do not try to be comprehensive.