[LTP] [PATCH v2] gethostname02: Accept EOVERFLOW on alpha

[Avinesh Kumar]

Hi,

On 6/2/26 11:02 AM, panzhe wrote:
> On alpha glibc's gethostname() directly calls the kernel
> syscall and sets errno to EOVERFLOW when the buffer is
> too small, because the kernel truncates silently and the
> string is not null terminated.
> 
> On the other hand, the generic posix implementation used
> on x86_64 sets ENAMETOOLONG in this case.
> 
> Fix this by accepting both errnos.
> 
> Closes: https://github.com/linux-test-project/ltp/issues/1319
> Signed-off-by: panzhe <panzhe@kylinos.cn>
> ---
>   testcases/kernel/syscalls/gethostname/gethostname02.c | 6 ++++--
>   1 file changed, 4 insertions(+), 2 deletions(-)
> 
> diff --git a/testcases/kernel/syscalls/gethostname/gethostname02.c b/testcases/kernel/syscalls/gethostname/gethostname02.c
> index c56fcb800..dd1f4e39e 100644
> --- a/testcases/kernel/syscalls/gethostname/gethostname02.c
> +++ b/testcases/kernel/syscalls/gethostname/gethostname02.c
> @@ -7,7 +7,7 @@
>   /*\
>    * Verify that gethostname(2) fails with
>    *
> - * - ENAMETOOLONG when len is smaller than the actual size
> + * - ENAMETOOLONG or EOVERFLOW when len is smaller than the actual size
>    */
>   
>   #include "tst_test.h"
> @@ -16,11 +16,13 @@ static void verify_gethostname(void)
>   {
>   	char hostname[HOST_NAME_MAX + 1];
>   	int real_length;
> +	const int exp_errnos[] = {ENAMETOOLONG, EOVERFLOW};
>   
>   	SAFE_GETHOSTNAME(hostname, sizeof(hostname));
>   	real_length = strlen(hostname);
>   
> -	TST_EXP_FAIL(gethostname(hostname, real_length - 1), ENAMETOOLONG,
> +	TST_EXP_FAIL_ARR(gethostname(hostname, real_length - 1),
> +		exp_errnos, ARRAY_SIZE(exp_errnos),

Please also fix make check error here

 > make check-gethostname02
CHECK testcases/kernel/syscalls/gethostname/gethostname02.c
gethostname02.c:25: CHECK: Alignment should match open parenthesis

with that
Reviewed-by: Avinesh Kumar <avinesh.kumar@suse.com>

>   		"len is smaller than the actual size");
>   }
>   

Regards,
Avinesh