From c469e3dadc604a9694f6262032b5e8cc89178799 Mon Sep 17 00:00:00 2001
From: oech3 <79379754+oech3@users.noreply.github.com>
Date: Tue, 10 Feb 2026 19:57:51 +0900
Subject: [PATCH] expr --version >/dev/full panics & --help > /dev/full should
 fail

---
 src/uu/expr/src/expr.rs | 15 ++++++++++-----
 1 file changed, 10 insertions(+), 5 deletions(-)

diff --git a/src/uu/expr/src/expr.rs b/src/uu/expr/src/expr.rs
index 75ce8620d6f..caaa9eec9b1 100644
--- a/src/uu/expr/src/expr.rs
+++ b/src/uu/expr/src/expr.rs
@@ -4,7 +4,7 @@
 // file that was distributed with this source code.
 
 use clap::{Arg, ArgAction, Command};
-use std::io::Write;
+use std::io::{Write, stdout};
 use syntax_tree::{AstNode, is_truthy};
 use thiserror::Error;
 use uucore::os_string_to_vec;
@@ -109,9 +109,14 @@ pub fn uumain(args: impl uucore::Args) -> UResult<()> {
         .collect::<Result<Vec<_>, _>>()?;
 
     if args.len() == 1 && args[0] == b"--help" {
-        let _ = uu_app().print_help();
+        uu_app().print_help()?;
     } else if args.len() == 1 && args[0] == b"--version" {
-        println!("{} {}", uucore::util_name(), uucore::crate_version!());
+        writeln!(
+            stdout(),
+            "{} {}",
+            uucore::util_name(),
+            uucore::crate_version!()
+        )?;
     } else {
         // The first argument may be "--" and should be be ignored.
         let args = if !args.is_empty() && args[0] == b"--" {
@@ -121,8 +126,8 @@ pub fn uumain(args: impl uucore::Args) -> UResult<()> {
         };
 
         let res = AstNode::parse(args)?.eval()?.eval_as_string();
-        let _ = std::io::stdout().write_all(&res);
-        let _ = std::io::stdout().write_all(b"\n");
+        let _ = stdout().write_all(&res);
+        let _ = stdout().write_all(b"\n");
 
         if !is_truthy(&res.into()) {
             return Err(1.into());