Re: [RFC PATCH-for-5.1 2/2] tpm: List the available TPM backends

[Philippe Mathieu-Daudé]

On 7/22/20 11:44 PM, Stefan Berger wrote:
> On 7/22/20 7:23 AM, Philippe Mathieu-Daudé wrote:
>> When an incorrect backend is selected, tpm_display_backend_drivers()
>> is supposed to list the available backends. However the error is
>> directly propagated, and we never display the list. The user only
>> gets "Parameter 'type' expects a TPM backend type" error.
>>
>> Convert the fprintf(stderr,) calls to error hints propagated with
>> the error.
>>
>> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
>> ---
>> RFC because this is now odd in tpm_config_parse():
> 
> because it's not using the fprintf anymore ?
> 
> 

Because when using &error_fatal you don't return:

    if (!strcmp(optarg, "help")) {
        tpm_list_backend_drivers_hint(&error_fatal);
        /* not reached */
        return -1;
    }

I should probably use that instead:

    if (!strcmp(optarg, "help")) {
        tpm_list_backend_drivers_hint(&error_fatal);
        g_assert_not_reached();
    }