cksum: Don't panic when checked file returned EIO

[oech3]

Closes #10175 .
We cannot add tests for device returning EIO and cannot backport corresponding GNU tests until we backport proper args managenent too.

[github-actions]

GNU testsuite comparison:

Skipping an intermittent issue tests/shuf/shuf-reservoir (passes in this run but fails in the 'main' branch)
Skipping an intermittent issue tests/sort/sort-stale-thread-mem (passes in this run but fails in the 'main' branch)
Skipping an intermittent issue tests/tail/inotify-dir-recreate (passes in this run but fails in the 'main' branch)

[ChrisDryden]

I was messing around with ways to make an integ test for this and I was able to replicate the conditions using /proc/self/mem . Will only work on linux but should give us regression coverage in the CI

  #[test]
  #[cfg(target_os = "linux")]
  fn test_check_file_with_io_error() {
      // /proc/self/mem causes EIO when read without proper seeking
      new_ucmd!()
          .arg("-a")
          .arg("md5")
          .arg("--check")
          .pipe_in("d8e8fca2dc0f896fd7cb4cb0031ba249  /proc/self/mem\n")
          .fails()
          .stderr_contains("Input/output error")
          .stdout_contains("FAILED open or read");
  }

[oech3]

After we found other bugs needed to dedup the code

[github-actions]

GNU testsuite comparison:

Skip an intermittent issue tests/shuf/shuf-reservoir (fails in this run but passes in the 'main' branch)
Skip an intermittent issue tests/sort/sort-stale-thread-mem (fails in this run but passes in the 'main' branch)
Skip an intermittent issue tests/tail/overlay-headers (fails in this run but passes in the 'main' branch)

[oech3]

https://github.com/uutils/coreutils/actions/runs/21444211790/job/61756584336?pr=10534#step:15:5331

[github-actions]

GNU testsuite comparison:

Skipping an intermittent issue tests/shuf/shuf-reservoir (passes in this run but fails in the 'main' branch)
Skipping an intermittent issue tests/sort/sort-stale-thread-mem (passes in this run but fails in the 'main' branch)
Skipping an intermittent issue tests/tail/inotify-dir-recreate (passes in this run but fails in the 'main' branch)

[oech3]

Does not work as we expected. ignore

[github-actions]

GNU testsuite comparison:

Skipping an intermittent issue tests/shuf/shuf-reservoir (passes in this run but fails in the 'main' branch)
Skipping an intermittent issue tests/sort/sort-stale-thread-mem (passes in this run but fails in the 'main' branch)
Skipping an intermittent issue tests/tail/inotify-dir-recreate (passes in this run but fails in the 'main' branch)

[dezgeg]

Does not work as we expected. ignore

If you mean the /proc/self/mem trick, it fails on musl due to error message being different. #[cfg(all(target_os = "linux", not(target_env = "musl")))] should work.

[github-actions]

GNU testsuite comparison:

Skipping an intermittent issue tests/shuf/shuf-reservoir (passes in this run but fails in the 'main' branch)
Skipping an intermittent issue tests/sort/sort-stale-thread-mem (passes in this run but fails in the 'main' branch)
Skipping an intermittent issue tests/tail/inotify-dir-recreate (passes in this run but fails in the 'main' branch)
Congrats! The gnu test tests/basenc/bounded-memory is now passing!

[oech3]

Thankyou