[LTP] [PATCH v4 3/5] shell: add kconfig parse api

[xuyang2018.jy@fujitsu.com]

Hi Li, Cyril, Petr

Any comment for this patchset?

Best Regards
Yang Xu
> Hi Li
>> On Tue, Jan 11, 2022 at 2:10 PM Yang Xu<xuyang2018.jy@fujitsu.com>   wrote:
>>
>>> +++ b/testcases/lib/tst_check_kconfigs.c
>>> @@ -0,0 +1,46 @@
>>> +// SPDX-License-Identifier: GPL-2.0-or-later
>>> +/* Copyright (c) 2022 FUJITSU LIMITED. All rights reserved.*/
>>> +
>>> +#include<stdio.h>
>>> +#include<string.h>
>>> +#include<stdlib.h>
>>> +#include "tst_kconfig.h"
>>> +
>>> +int main(int argc, char *argv[])
>>> +{
>>> +       char *str = argv[1];
>>> +       char *delim = argv[2];
>>> +       unsigned int i, cnt = 1;
>>> +       int ret = 0;
>>> +
>>> +       if (argc == 2 || strlen(delim) == 0) {
>>
>> I doubt that this syntax really works here.
>>
>> How can we get the strlen(delim) equal to 0? if the argc is
>> not 2, why the length of delimi is zero? but if we change ||
>> to&&, then get a segment fault. I don't understand this.
>
> Sorry, this is ugly code. please see the lastest code.
>>
>>> +               delim = ",";
>>> +       } else if (argc == 3) {
>>> +               if (strlen(delim)>   1) {
>>> +                       fprintf(stderr, "The delim must be a single character\n");
>>> +                       return 1;
>>> +               }
>>> +       } else {
>>> +               fprintf(stderr, "Please provide kernel kconfig list and delim "
>>> +                               "(optinal, default value is ',')\n");
>>> +               return 1;
>>> +       }
>>> +
>>> +       for (i = 0; str[i]; i++) {
>>> +               if (str[i] == delim[0])
>>> +                       cnt++;
>>> +       }
>>> +
>>> +       char **kconfigs = malloc(++i * sizeof(char *));
>>
>> Shouldn't this be malloc(++cnt * sizeof(char*)) ?
> Oh, yes. Sorry for this typo.
>>
>>> +
>>> +       for (i = j0; i<   cnt; i++)
>>> +               kconfigs[i] = strtok_r(str, delim,&str);
>>> +
>>> +       kconfigs[i] = NULL;
> This is also useless.
>
> The lastest code should be as below:
>
> int main(int argc, char *argv[])
> {
>           char *str = argv[1];
>           char *delim = argv[2];
>           unsigned int i, cnt = 1;
>           int ret = 0;
>
>           if (argc == 2) {
>                   delim = ",";
>           } else if (argc == 3) {
>                   if (strlen(delim)>  1) {
>                           fprintf(stderr, "The delim must be a single
> character\n");
>                           return 1;
>                   }
>           } else {
>                   fprintf(stderr, "Please provide kernel kconfig list and
> delim "
>                                   "(optinal, default value is ',')\n");
>                   return 1;
>           }
>
>           for (i = 0; str[i]; i++) {
>                   if (str[i] == delim[0])
>                           cnt++;
>           }
>
>           char **kconfigs = malloc(++cnt * sizeof(char *));
>
>           for (i = 0; i<  cnt; i++)
>                   kconfigs[i] = strtok_r(str, delim,&str);
>
>           if (tst_kconfig_check((const char * const*)kconfigs))
>                   ret = 1;
>
>           free(kconfigs);
>           return ret;
> }
>
>
> Best Regards
> Yang Xu
>>> +
>>> +       if (tst_kconfig_check((const char * const*)kconfigs))
>>> +               ret = 1;
>>> +
>>> +       free(kconfigs);
>>> +       return ret;
>>> +}
>>
>