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comparison libpam-sys/libpam-sys-impls/src/lib.rs @ 176:0730f5f2ee2a

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Turn `libpam-sys-consts` back into `libpam-sys-impls`. This moves the constants into `libpam-sys` and makes `libpam-sys-impls` responsible solely for detecting the current PAM implementation.
author Paul Fisher <paul@pfish.zone>
date Wed, 30 Jul 2025 17:53:31 -0400
parents libpam-sys/libpam-sys-consts/src/lib.rs@e9354e655f38
children 995aca290452
comparison
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175:e30775c80b49 176:0730f5f2ee2a
1 //! Information about the PAM implementation you're using right now.
2 //!
3 //! This module contains constants and values that can be used at build-script,
4 //! compile, and run time to determine what PAM implementation you're using.
5 //!
6 //! ## Always available
7 //!
8 //! [`PamImpl::CURRENT`] will tell you what version of PAM you're using.
9 //! It can be imported in any Rust code, from build scripts to runtime.
10 //!
11 //! ## Compile time
12 //!
13 //! Use [`enable_pam_impl_cfg`] in your `build.rs` to generate custom `#[cfg]`s
14 //! for conditional compilation based on PAM implementation.
15 //!
16 //! ```
17 //! // Your package's build.rs:
18 //!
19 //! fn main() {
20 //! // Also available at libpam_sys::pam_impl::enable_pam_impl_cfg().
21 //! libpam_sys_impls::enable_pam_impl_cfg();
22 //! // whatever else you do in your build script.
23 //! }
24 //! ```
25 //!
26 //! This will set the current `pam_impl` as well as registering all known
27 //! PAM implementations with `rustc-check-cfg` to get cfg-checking.
28 //!
29 //! The names that appear in the `cfg` variables are the same as the values
30 //! in the [`PamImpl`] enum.
31 //!
32 //! ```ignore
33 //! #[cfg(pam_impl = "OpenPam")]
34 //! fn openpam_specific_func(handle: *const libpam_sys::pam_handle) {
35 //! let environ = libpam_sys::pam_getenvlist(handle);
36 //! // ...
37 //! libpam_sys::openpam_free_envlist()
38 //! }
39 //!
40 //! // This will give you a warning since "UnknownImpl" is not in the cfg.
41 //! #[cfg(not(pam_impl = "UnknownImpl"))]
42 //! fn do_something() {
43 //! // ...
44 //! }
45 //! ```
46 //!
47 //! The [`pam_impl_name!`] macro will expand to this same value, currently
48 #![doc = concat!("`", env!("LIBPAMSYS_IMPL"), "`.")]
49
50 mod pam_impl;
51
52 #[doc(inline)]
53 pub use pam_impl::*;