[PATCH v10 6/9] test: fix impossible format-truncation in cfgfiles

[Marat Khalili]

> -----Original Message-----
> From: Stephen Hemminger <stephen at networkplumber.org>
> Sent: Monday 29 December 2025 21:59
> To: dev at dpdk.org
> Cc: Stephen Hemminger <stephen at networkplumber.org>; stable at dpdk.org; Anatoly Burakov
> <anatoly.burakov at intel.com>; Cristian Dumitrescu <cristian.dumitrescu at intel.com>; Bruce Richardson
> <bruce.richardson at intel.com>
> Subject: [PATCH v10 6/9] test: fix impossible format-truncation in cfgfiles
> 
> Although, it is not possible on Linux (which always uses /tmp)
> the compiler complains about possible snprintf() truncation.
> 
> Use existing code to make empty tmp file which puts the
> OS specific code in one spot and avoids any races if
> two tests are run at once.
> 
> Fixes: be22019a58c4 ("test: restore cfgfile tests")
> Cc: stable at dpdk.org
> 
> Signed-off-by: Stephen Hemminger <stephen at networkplumber.org>
> Acked-by: Anatoly Burakov <anatoly.burakov at intel.com>
> ---
>  app/test/test_cfgfile.c | 8 ++------
>  1 file changed, 2 insertions(+), 6 deletions(-)
> 
> diff --git a/app/test/test_cfgfile.c b/app/test/test_cfgfile.c
> index b189d9d7a5..eabf155404 100644
> --- a/app/test/test_cfgfile.c
> +++ b/app/test/test_cfgfile.c
> @@ -178,12 +178,8 @@ test_cfgfile_realloc_sections(void)
>  	ret = remove(filename);
>  	TEST_ASSERT_SUCCESS(ret, "Failed to remove file");
> 
> -	char tmp[PATH_MAX] = "/tmp/";
> -#ifdef RTE_EXEC_ENV_WINDOWS
> -	ret = GetTempPathA(sizeof(tmp), tmp);
> -	TEST_ASSERT(ret > 0, "Failed to get tmp directory");
> -#endif
> -	snprintf(filename, sizeof(filename), "%s%s", tmp, "cfg_save.ini");
> +	ret = make_tmp_file(filename, "save", "");
> +	TEST_ASSERT(ret == 0, "Failed to make empty tmp filename for save");
> 
>  	ret = rte_cfgfile_save(cfgfile, filename);
>  	TEST_ASSERT_SUCCESS(ret, "Failed to save to %s", filename);
> --
> 2.51.0
> 

Acked-by: Marat Khalili <marat.khalili at huawei.com>