bug#42633: 8.32 make check as root failure of rmdir/ignore.sh

[Bernhard Voelker]

On 2020-07-31 16:32, Nick Alcock wrote:
> I get an ERROR when running rmdir/ignore.sh as root (but not when
> running as non-root). [...]

> ERROR: tests/rmdir/ignore
> =========================
[...]
> + mkdir -p x/y
> + chmod a-w x
> + returns_ 1 rmdir --ignore-fail-on-non-empty x/y
> + fail=1

Thanks for reporting this issue.

Indeed, this test does not work as root.
The comment in the test explains that it expects an EPERM error:

  # Ensure that with --ignore-fail-on-non-empty, we still fail, e.g., for EPERM.
  # Between 6.11 and 8.31, the following rmdir would mistakenly succeed.
  mkdir -p x/y || framework_failure_
  chmod a-w x || framework_failure_
  returns_ 1 rmdir --ignore-fail-on-non-empty x/y || fail=1

but root does not see the EPERM; strace output:

  ...
  rmdir("x/y")                            = 0
  close(1)                                = 0
  close(2)                                = 0
  exit_group(0)                           = ?
  +++ exited with 0 +++

The attached patch adds guards around the parts of the test which
only work as non-privileged user.

Have a nice day,
Berny

0001-tests-skip-some-parts-of-tests-rmdir-ignore.sh-if-ru.patch
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