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annotate libpam-sys/libpam-sys-consts/src/lib.rs @ 170:f052e2417195

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Completely avoid using libpam_sys if we're not actually linking.
author Paul Fisher <paul@pfish.zone>
date Wed, 16 Jul 2025 18:45:20 -0400
parents e9354e655f38
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 pub mod constants;
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2
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3 /// Information about the PAM implementation you're using right now.
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4 ///
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5 /// This module contains constants and values that can be used at build-script,
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6 /// compile, and run time to determine what PAM implementation you're using.
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7 ///
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8 /// ## Always available
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9 ///
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10 /// [`PamImpl::CURRENT`] will tell you what version of PAM you're using.
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11 /// It can be imported in any Rust code, from build scripts to runtime.
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12 ///
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13 /// ## Compile time
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14 ///
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15 /// Use [`enable_pam_impl_cfg`] in your `build.rs` to generate custom `#[cfg]`s
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16 /// for conditional compilation based on PAM implementation.
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17 ///
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18 /// ```
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19 /// // Your package's build.rs:
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20 ///
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21 /// use libpam_sys_consts::pam_impl;
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22 /// // also available at libpam_sys::pam_impl
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23 ///
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24 /// fn main() {
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25 /// pam_impl::enable_pam_impl_cfg();
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26 /// // whatever else you do in your build script.
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27 /// }
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28 /// ```
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29 ///
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30 /// This will set the current `pam_impl` as well as registering all known
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31 /// PAM implementations with `rustc-check-cfg` to get cfg-checking.
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32 ///
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33 /// The names that appear in the `cfg` variables are the same as the values
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34 /// in the [`PamImpl`] enum.
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35 ///
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36 /// ```ignore
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37 /// #[cfg(pam_impl = "OpenPam")]
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38 /// fn openpam_specific_func(handle: *const libpam_sys::pam_handle) {
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39 /// let environ = libpam_sys::pam_getenvlist(handle);
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40 /// // ...
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41 /// libpam_sys::openpam_free_envlist()
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42 /// }
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43 ///
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44 /// // This will give you a warning since "UnknownImpl" is not in the cfg.
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45 /// #[cfg(not(pam_impl = "UnknownImpl"))]
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46 /// fn do_something() {
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47 /// // ...
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48 /// }
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49 /// ```
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50 ///
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51 /// The [`pam_impl_name!`] macro will expand to this same value, currently
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52 #[doc = concat!("`", env!("LIBPAMSYS_IMPL"), "`.")]
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53 pub mod pam_impl;
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54
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55 #[doc(inline)]
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56 pub use pam_impl::*;