2024-04-17 18:50:13

by Amer Al Shanawany

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

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 <[email protected]>
---
.../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);
}
--
2.34.1

2024-04-19 16:42:04

by Muhammad Usama Anjum

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

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 <[email protected]>
Reviewed-by: Muhammad Usama Anjum <[email protected]>

> ---
> .../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);
> }

--
BR,
Muhammad Usama Anjum

2024-05-04 17:17:21

by Amer Al Shanawany

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

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 <[email protected]>
> Reviewed-by: Muhammad Usama Anjum <[email protected]>
>
>> ---
>> .../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