[PATCH 3/4] app/testpmd: check for no arguments

[fengchengwen]

On 3/13/2026 1:03 AM, Stephen Hemminger wrote:
> On Thu, 12 Mar 2026 20:37:42 +0800
> fengchengwen <fengchengwen at huawei.com> wrote:
> 
>> Hi Kevin,
>>
>> On 3/12/2026 6:36 PM, Kevin Traynor wrote:
>>> For the case where token is NULL, there are no arguments
>>> and split_str[0] is used uninitialized.  
>>
>> In which case the token is NULL, if there are no arguments, the cmdline's
>> callback won't be invoke.
>>
>> Thanks
> 
> It still maybe possible to get there with an empty string ""
> which would evaluate to no arguments?

No, as tested below:

testpmd> port config  dcb vt on 4 pfc ""
Bad arguments
testpmd> port config  dcb vt on 4 pfc ''
Bad arguments
testpmd> port config  dcb vt on 4 pfc '
Bad arguments
testpmd> port config  dcb vt on 4 pfc
Bad arguments