coreutils: Fail with invalid binary name

Author: oech3

src/bin/coreutils.rs

@@ -65,10 +65,12 @@ fn main() {
         if let Some(util) = validation::find_prefixed_util(binary_as_util, utils.keys().copied()) {
             // prefixed util => replace 0th (aka, executable name) argument
             Some(OsString::from(util))
-        } else {
-            // unmatched binary name => regard as multi-binary container and advance argument list
+        } else if binary_as_util.ends_with("coreutils") {
             uucore::set_utility_is_second_arg();
             args.next()
+        } else {
+            println!("coreutils: I was probably called as symlink to false");
+            process::exit(1);
         };
 
     // 0th argument equals util name?

tests/test_util_name.rs

@@ -177,7 +177,7 @@ fn util_non_utf8_name_help() {
 #[test]
 #[cfg(unix)]
 fn util_invalid_name_invalid_command() {
-    use std::process::{Command, Stdio};
+    use std::process::Command;
 
     let scenario = TestScenario::new("invalid_name");
     symlink_file(&scenario.bin_path, scenario.fixtures.plus("invalid_name")).unwrap();
@@ -186,20 +186,11 @@ fn util_invalid_name_invalid_command() {
         return;
     }
 
-    let child = Command::new(scenario.fixtures.plus("invalid_name"))
-        .arg("definitely_invalid")
-        .stdin(Stdio::piped())
-        .stdout(Stdio::piped())
-        .stderr(Stdio::piped())
-        .spawn()
-        .unwrap();
-    let output = child.wait_with_output().unwrap();
-    assert_eq!(output.status.code(), Some(1));
-    assert_eq!(output.stdout, b"");
-    assert_eq!(
-        output.stderr,
-        b"definitely_invalid: function/utility not found\n"
-    );
+    let code = Command::new(scenario.fixtures.plus("invalid_name"))
+        .status()
+        .unwrap()
+        .code();
+    assert_eq!(code, Some(1)); //for GNU compat
 }
 
 #[test]