//! Interface to the pluggable authentication module framework (PAM).
//!
//! The goal of this library is to provide a type-safe API that can be used to
//! interact with PAM.  The library is incomplete - currently it supports
//! a subset of functions for use in a pam authentication module.  A pam module
//! is a shared library that is invoked to authenticate a user, or to perform
//! other functions.
//!
//! For general information on writing pam modules, see
//! [The Linux-PAM Module Writers' Guide][module-guide]
//!
//! [module-guide]: https://www.chiark.greenend.org.uk/doc/libpam-doc/html/Linux-PAM_MWG.html
//!
//! A typical authentication module will define an external function called
//! `pam_sm_authenticate()`, which will use functions in this library to
//! interrogate the program that requested authentication for more information,
//! and to render a result.  For a working example that uses this library, see
//! [toznyauth-pam][].
//!
//! [toznyauth-pam]: https://github.com/tozny/toznyauth-pam
//!
//! Note that constants that are normally read from pam header files are
//! hard-coded in the `constants` module.  The values there are taken from
//! a Linux system.  That means that it might take some work to get this library
//! to work on other platforms.

extern crate libc;

pub mod constants;
pub mod conv;
pub mod items;
#[doc(hidden)]
pub mod macros;
pub mod module;