cksum: read the next file when the first is missing or invalid

tests/by-util/test_cksum.rs

@@ -2,7 +2,7 @@
 //
 // For the full copyright and license information, please view the LICENSE
 // file that was distributed with this source code.
-// spell-checker:ignore (words) asdf algo algos
+// spell-checker:ignore (words) asdf algo algos mgmt
 
 use crate::common::util::TestScenario;
 
@@ -1221,3 +1221,32 @@ fn test_check_base64_hashes() {
         .succeeds()
         .stdout_is("empty: OK\nempty: OK\nempty: OK\n");
 }
+
+#[test]
+fn test_several_files_error_mgmt() {
+    let scene = TestScenario::new(util_name!());
+    let at = &scene.fixtures;
+
+    // don't exist
+    scene
+        .ucmd()
+        .arg("--check")
+        .arg("empty")
+        .arg("incorrect")
+        .fails()
+        .stderr_contains("empty: No such file ")
+        .stderr_contains("incorrect: No such file ");
+
+    at.touch("empty");
+    at.touch("incorrect");
+
+    // exists but incorrect
+    scene
+        .ucmd()
+        .arg("--check")
+        .arg("empty")
+        .arg("incorrect")
+        .fails()
+        .stderr_contains("empty: no properly ")
+        .stderr_contains("incorrect: no properly ");
+}