hashsum: don't fail on os errors

Author: Ada-Armstrong

src/uu/hashsum/src/hashsum.rs

@@ -25,7 +25,7 @@ use uucore::checksum::detect_algo;
 use uucore::checksum::digest_reader;
 use uucore::checksum::escape_filename;
 use uucore::checksum::perform_checksum_validation;
-use uucore::error::{FromIo, UResult};
+use uucore::error::{UResult, strip_errno};
 use uucore::format_usage;
 use uucore::sum::{Digest, Sha3_224, Sha3_256, Sha3_384, Sha3_512, Shake128, Shake256};
 use uucore::translate;
@@ -552,9 +552,10 @@ where
                     Ok(f) => f,
                     Err(e) => {
                         eprintln!(
-                            "{}: {}: {e}",
+                            "{}: {}: {}",
                             options.binary_name,
-                            filename.to_string_lossy()
+                            filename.to_string_lossy(),
+                            strip_errno(&e)
                         );
                         err_found = Some(ChecksumError::Io(e));
                         continue;
@@ -564,13 +565,25 @@ where
             },
         );
 
-        let (sum, _) = digest_reader(
+        let sum = match digest_reader(
             &mut options.digest,
             &mut file,
             options.binary,
             options.output_bits,
-        )
-        .map_err_context(|| translate!("hashsum-error-failed-to-read-input"))?;
+        ) {
+            Ok((sum, _)) => sum,
+            Err(e) => {
+                eprintln!(
+                    "{}: {}: {}",
+                    options.binary_name,
+                    filename.to_string_lossy(),
+                    strip_errno(&e)
+                );
+                err_found = Some(ChecksumError::Io(e));
+                continue;
+            }
+        };
+
         let (escaped_filename, prefix) = escape_filename(filename);
         if options.tag {
             if options.algoname == "blake2b" {

tests/by-util/test_hashsum.rs

@@ -872,6 +872,32 @@ fn test_check_directory_error() {
         .stderr_contains(err_msg);
 }
 
+#[test]
+fn test_continue_after_directory_error() {
+    let scene = TestScenario::new(util_name!());
+    let at = &scene.fixtures;
+
+    at.mkdir("d");
+    at.touch("file");
+    #[cfg(not(windows))]
+    let (out, err_msg) = (
+        "d41d8cd98f00b204e9800998ecf8427e  file\n",
+        "md5sum: d: Is a directory\n",
+    );
+    #[cfg(windows)]
+    let (out, err_msg) = (
+        "d41d8cd98f00b204e9800998ecf8427e *file\n",
+        "md5sum: d: Access is denied.\n",
+    );
+    scene
+        .ccmd("md5sum")
+        .arg("d")
+        .arg("file")
+        .fails()
+        .stdout_is(out)
+        .stderr_is(err_msg);
+}
+
 #[test]
 fn test_check_quiet() {
     let scene = TestScenario::new(util_name!());