Re: [PATCH] selftests: filesystems: fix warn_unused_result build warnings

From: Amer Al Shanawany
Date: Mon Jun 03 2024 - 07:18:30 EST


On 5/4/24 19:17, Amer Al Shanawany wrote:
> On 4/19/24 18:41, Muhammad Usama Anjum wrote:
>> On 4/17/24 11:49 PM, Amer Al Shanawany wrote:
>>> Fix the following warnings by adding return check and error messages.
>>>
>>> statmount_test.c: In function ‘cleanup_namespace’:
>>> statmount_test.c:128:9: warning: ignoring return value of ‘fchdir’
>>> declared with attribute ‘warn_unused_result’ [-Wunused-result]
>>> 128 | fchdir(orig_root);
>>> | ^~~~~~~~~~~~~~~~~
>>> statmount_test.c:129:9: warning: ignoring return value of ‘chroot’
>>> declared with attribute ‘warn_unused_result’ [-Wunused-result]
>>> 129 | chroot(".");
>>> | ^~~~~~~~~~~
>>>
>>> Signed-off-by: Amer Al Shanawany <amer.shanawany@xxxxxxxxx>
>> Reviewed-by: Muhammad Usama Anjum <usama.anjum@xxxxxxxxxxxxx>
>>
>>> ---
>>> .../selftests/filesystems/statmount/statmount_test.c | 12 ++++++++++--
>>> 1 file changed, 10 insertions(+), 2 deletions(-)
>>>
>>> diff --git a/tools/testing/selftests/filesystems/statmount/statmount_test.c b/tools/testing/selftests/filesystems/statmount/statmount_test.c
>>> index e6d7c4f1c85b..e8c019d72cbf 100644
>>> --- a/tools/testing/selftests/filesystems/statmount/statmount_test.c
>>> +++ b/tools/testing/selftests/filesystems/statmount/statmount_test.c
>>> @@ -125,8 +125,16 @@ static uint32_t old_root_id, old_parent_id;
>>>
>>> static void cleanup_namespace(void)
>>> {
>>> - fchdir(orig_root);
>>> - chroot(".");
>>> + int ret;
>>> +
>>> + ret = fchdir(orig_root);
>>> + if (ret == -1)
>>> + ksft_perror("fchdir to original root");
>>> +
>>> + ret = chroot(".");
>>> + if (ret == -1)
>>> + ksft_perror("chroot to original root");
>>> +
>>> umount2(root_mntpoint, MNT_DETACH);
>>> rmdir(root_mntpoint);
>>> }
> Hi,
>
> Can you please consider this patch?
>
> Thank  you
>
> Amer
>
>
>
Hello,

Could you please consider this simple patch for fixing build warnings for kselftest ?

Thank you

Amer