From f510a9c66db03b86bfca657ec0f73d9056a2a619 Mon Sep 17 00:00:00 2001
From: oech3 <79379754+oech3@users.noreply.github.com>
Date: Tue, 13 Jan 2026 19:44:31 +0900
Subject: [PATCH] nice: -n huge_num true

---
 src/uu/nice/src/nice.rs    | 19 +++++++++++++------
 tests/by-util/test_nice.rs | 30 ++++++++++++++++++++++++++++++
 2 files changed, 43 insertions(+), 6 deletions(-)

diff --git a/src/uu/nice/src/nice.rs b/src/uu/nice/src/nice.rs
index fc1e9057bf9..78036649f1e 100644
--- a/src/uu/nice/src/nice.rs
+++ b/src/uu/nice/src/nice.rs
@@ -9,6 +9,7 @@ use clap::{Arg, ArgAction, Command};
 use libc::PRIO_PROCESS;
 use std::ffi::OsString;
 use std::io::{Error, ErrorKind, Write};
+use std::num::IntErrorKind;
 use std::os::unix::process::CommandExt;
 use std::process;
 
@@ -23,6 +24,8 @@ pub mod options {
     pub static COMMAND: &str = "COMMAND";
 }
 
+const NICE_BOUND_NO_OVERFLOW: i32 = 50;
+
 fn is_prefix_of(maybe_prefix: &str, target: &str, min_match: usize) -> bool {
     if maybe_prefix.len() < min_match || maybe_prefix.len() > target.len() {
         return false;
@@ -126,12 +129,16 @@ pub fn uumain(args: impl uucore::Args) -> UResult<()> {
             }
             match nstr.parse::<i32>() {
                 Ok(num) => num,
-                Err(e) => {
-                    return Err(USimpleError::new(
-                        125,
-                        translate!("nice-error-invalid-number", "value" => nstr.clone(), "error" => e),
-                    ));
-                }
+                Err(e) => match e.kind() {
+                    IntErrorKind::PosOverflow => NICE_BOUND_NO_OVERFLOW,
+                    IntErrorKind::NegOverflow => -NICE_BOUND_NO_OVERFLOW,
+                    _ => {
+                        return Err(USimpleError::new(
+                            125,
+                            translate!("nice-error-invalid-number", "value" => nstr.clone(), "error" => e),
+                        ));
+                    }
+                },
             }
         }
         None => {
diff --git a/tests/by-util/test_nice.rs b/tests/by-util/test_nice.rs
index 73ebf26722f..8dac2527777 100644
--- a/tests/by-util/test_nice.rs
+++ b/tests/by-util/test_nice.rs
@@ -90,3 +90,33 @@ fn test_trailing_empty_adjustment() {
         "error: The argument '--adjustment <adjustment>' requires a value but none was supplied",
     );
 }
+
+#[test]
+fn test_nice_huge() {
+    new_ucmd!()
+        .args(&[
+            "-n",
+            "99999999999999999999999999999999999999999999999999999999999999999999999999999999999999999",
+            "true",
+        ])
+        .succeeds()
+        .no_stdout();
+}
+
+#[test]
+fn test_nice_huge_negative() {
+    new_ucmd!().args(&["-n", "-9999999999", "true"]).succeeds();
+    //.stderr_contains("Permission denied"); Depending on platform?
+}
+
+#[test]
+fn test_sign_middle() {
+    new_ucmd!()
+        .args(&["-n", "-2+4", "true"])
+        .fails_with_code(125)
+        .no_stdout()
+        .stderr_contains("invalid");
+}
+//uu: "-2+4" is not a valid number: invalid digit found in string
+//gnu: invalid adjustment `-2+4'
+//Both message is fine