Re: [PATCH 2/3] selftest/exec: conform test to TAP format output

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On Mon, Mar 04, 2024 at 08:59:24PM +0500, Muhammad Usama Anjum wrote:
> Conform the layout, informational and status messages to TAP. No
> functional change is intended other than the layout of output messages.
> 
> Signed-off-by: Muhammad Usama Anjum <usama.anjum@xxxxxxxxxxxxx>
> ---
>  tools/testing/selftests/exec/load_address.c | 34 +++++++++------------
>  1 file changed, 15 insertions(+), 19 deletions(-)
> 
> diff --git a/tools/testing/selftests/exec/load_address.c b/tools/testing/selftests/exec/load_address.c
> index d487c2f6a6150..17e3207d34ae7 100644
> --- a/tools/testing/selftests/exec/load_address.c
> +++ b/tools/testing/selftests/exec/load_address.c
> @@ -5,6 +5,7 @@
>  #include <link.h>
>  #include <stdio.h>
>  #include <stdlib.h>
> +#include "../kselftest.h"
>  
>  struct Statistics {
>  	unsigned long long load_address;
> @@ -41,28 +42,23 @@ int main(int argc, char **argv)
>  	unsigned long long misalign;
>  	int ret;
>  
> +	ksft_print_header();
> +	ksft_set_plan(1);
> +
>  	ret = dl_iterate_phdr(ExtractStatistics, &extracted);
> -	if (ret != 1) {
> -		fprintf(stderr, "FAILED\n");
> -		return 1;
> -	}
> +	if (ret != 1)
> +		ksft_exit_fail_msg("FAILED: dl_iterate_phdr\n");

I'm for this series, but I do note a weird glitch in the ksft API.
ksft_exit_fail_msg does:

        va_start(args, msg);
        printf("Bail out! ");
        errno = saved_errno;
        vprintf(msg, args);
        va_end(args);

"Bail out!" is not very descriptive. I think I'd rather this should be:

	"FAILED: "

and then that added prefix doesn't need to be added everywhere in this
patch, nor the "error: " prefix in the next patch.

-- 
Kees Cook




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