//! The PAM library FFI and helpers for managing it.
//!
//! This includes the functions provided by PAM and the data structures
//! used by PAM, as well as a few low-level abstractions for dealing with
//! those data structures.
//!
//! Everything in here is hazmat.
//!

#![allow(dead_code)]

mod conversation;
mod handle;
mod memory;
mod message;
mod response;

pub use handle::{LibPamHandle, OwnedLibPamHandle};
use std::ffi::{c_char, c_int, c_void};

#[link(name = "pam")]
extern "C" {
    fn pam_get_data(
        pamh: *mut LibPamHandle,
        module_data_name: *const c_char,
        data: &mut *const c_void,
    ) -> c_int;

    fn pam_set_data(
        pamh: *mut LibPamHandle,
        module_data_name: *const c_char,
        data: *const c_void,
        cleanup: extern "C" fn(pamh: *const c_void, data: *mut c_void, error_status: c_int),
    ) -> c_int;

    fn pam_get_item(pamh: *mut LibPamHandle, item_type: c_int, item: &mut *const c_void) -> c_int;

    fn pam_set_item(pamh: *mut LibPamHandle, item_type: c_int, item: *const c_void) -> c_int;

    fn pam_get_user(
        pamh: *mut LibPamHandle,
        user: &mut *const c_char,
        prompt: *const c_char,
    ) -> c_int;

    fn pam_get_authtok(
        pamh: *mut LibPamHandle,
        item_type: c_int,
        data: &mut *const c_char,
        prompt: *const c_char,
    ) -> c_int;

    fn pam_end(pamh: *mut LibPamHandle, status: c_int) -> c_int;

    // TODO: pam_authenticate - app
    //       pam_setcred - app
    //       pam_acct_mgmt - app
    //       pam_chauthtok - app
    //       pam_open_session - app
    //       pam_close_session - app
    //       pam_putenv - shared
    //       pam_getenv - shared
    //       pam_getenvlist - shared
}