tee: fix < . message and strip errno

src/uu/tee/locales/en-US.ftl

@@ -14,7 +14,7 @@ tee-help-output-error-exit = exit on write errors to any output
 tee-help-output-error-exit-nopipe = exit on write errors to any output that are not pipe errors (equivalent to exit on non-unix platforms)
 
 # Error messages
-tee-error-stdin = stdin: { $error }
+tee-error-stdin = read error: { $error }
 
 # Other messages
 tee-standard-output = 'standard output'

src/uu/tee/locales/fr-FR.ftl

@@ -14,7 +14,7 @@ tee-help-output-error-exit = quitter en cas d'erreurs d'écriture vers toute sor
 tee-help-output-error-exit-nopipe = quitter en cas d'erreurs d'écriture vers toute sortie qui ne sont pas des erreurs de tube (équivalent à exit sur les plateformes non-unix)
 
 # Messages d'erreur
-tee-error-stdin = stdin : { $error }
+tee-error-stdin = erreur de lecture: { $error }
 
 # Autres messages
 tee-standard-output = 'sortie standard'

src/uu/tee/src/tee.rs

@@ -9,7 +9,7 @@ use std::fs::OpenOptions;
 use std::io::{Error, ErrorKind, Read, Result, Write, stderr, stdin, stdout};
 use std::path::PathBuf;
 use uucore::display::Quotable;
-use uucore::error::UResult;
+use uucore::error::{UResult, strip_errno};
 use uucore::format_usage;
 use uucore::parser::shortcut_value_parser::ShortcutValueParser;
 use uucore::translate;
@@ -431,7 +431,11 @@ impl Read for NamedReader {
     fn read(&mut self, buf: &mut [u8]) -> Result<usize> {
         match self.inner.read(buf) {
             Err(f) => {
-                let _ = writeln!(stderr(), "{}", translate!("tee-error-stdin", "error" => f));
+                let _ = writeln!(
+                    stderr(),
+                    "tee: {}",
+                    translate!("tee-error-stdin", "error" => strip_errno(&f))
+                );
                 Err(f)
             }
             okay => okay,

tests/by-util/test_tee.rs

@@ -16,6 +16,15 @@ use std::time::Duration;
 
 // spell-checker:ignore nopipe
 
+#[test]
+#[cfg(unix)]
+fn test_error_stdin_directory() {
+    new_ucmd!()
+        .set_stdin(std::fs::File::open(".").unwrap())
+        .fails_with_code(1)
+        .stderr_is("tee: read error: Is a directory\n");
+}
+
 #[test]
 fn test_invalid_arg() {
     new_ucmd!().arg("--definitely-invalid").fails_with_code(1);