[PATCH v3 0/1] MR134: ntdll: Don't hard-code the battery and AC adapter names on Linux

[Alexandre Julliard (@julliard)]

Alexandre Julliard (@julliard) commented about dlls/ntdll/unix/system.c:
>      return cmz;
>  }
>  
> -static const char * get_sys_str(const char *path, char *s)
> +static const char * get_sys_str(const char *dirname, const char *basename, char *s)
>  {
> -    FILE *f = fopen(path, "r");
> +    char path[64];
> +    FILE *f;
>      const char *ret = NULL;
>  
> -    if (f)
> +    if (snprintf(path, sizeof(path), "%s/%s", dirname, basename) < 0) return NULL;
snprintf doesn't return -1 on overflow (which is the only failure you care about here).

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https://gitlab.winehq.org/wine/wine/-/merge_requests/134#note_2141