Wrapper for PAM

[Salih Dincer]

On Monday, 7 October 2024 at 08:23:08 UTC, Alexander Zhirov wrote:
> I tried to build a class with a private function 
> `conversation_func` to call it inside the public authentication 
> function. When compiling I get this message:
> ```
> source/login/auth.d(87,46): Deprecation: casting from extern 
> (C) int delegate(int num_msg, const(pam_message**) msg, 
> pam_response** resp, void* appdata_ptr) to extern (C) int 
> function(int, const(pam_message**), pam_response**, void*)* is 
> deprecated
> ```
> And when I start up, at the moment of calling the 
> authentication function, I get `Segmentation fault`.
>
> Is the function identified differently in the class? How can 
> this be fixed?

Would you try static this?

```d
// 1. Salih changed it:
extern(C) static int conversation_func(int num_msg, const 
pam_message **msg, pam_response **resp, void *appdata_ptr)
{ /* ... */}
```

There is no need for `this`.

```d
// 2. Salih changed it:
pam_conv conv = {
   cast(conversation*)&/*this.*/conversation_func,
   appdata_ptr
};
```

SDB at 79