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annotate libpam-sys/libpam-sys-test/build.rs @ 124:f469b8d9ad78

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Add tests for the original X/SSO constants list.
author Paul Fisher <paul@pfish.zone>
date Mon, 30 Jun 2025 04:54:38 -0400
parents 9e05e44050d0
children 2b255c92417b
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1 use bindgen::MacroTypeVariation;
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2 use libpam_sys::PamImpl;
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3 use quote::{format_ident, ToTokens};
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4 use std::path::PathBuf;
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5 use std::{env, fs};
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6 use syn::{Item, ItemConst, Type, TypePath};
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7
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8 fn main() {
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9 let config = match PamImpl::CURRENT {
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10 PamImpl::LinuxPam => TestConfig {
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11 headers: vec![
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12 "<security/_pam_types.h>",
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13 "<security/pam_appl.h>",
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14 "<security/pam_ext.h>",
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15 "<security/pam_modules.h>",
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16 ],
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17 ignore_consts: vec![
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18 "__LINUX_PAM__",
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19 "__LINUX_PAM_MINOR__",
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20 "PAM_AUTHTOK_RECOVER_ERR",
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21 ],
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22 ..Default::default()
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23 },
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24 PamImpl::OpenPam => TestConfig {
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25 headers: vec![
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26 "<security/pam_types.h>",
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27 "<security/openpam.h>",
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28 "<security/pam_appl.h>",
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29 "<security/pam_constants.h>",
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30 ],
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31 ignore_consts: vec!["OPENPAM_VERSION", "OPENPAM_RELEASE", "PAM_SOEXT"],
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32 ..Default::default()
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33 },
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34 PamImpl::Sun => TestConfig {
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35 headers: vec!["<security/pam_appl.h>", "<security/pam_modules.h>"],
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36 block_headers: vec!["sys/.*"],
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37 ..Default::default()
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38 },
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39 PamImpl::XSso => TestConfig {
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40 headers: vec!["\"xsso_constants.h\""],
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41 ignore_consts: vec!["PAM_CRED_PRELIM_CHECK"],
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42 ..Default::default()
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43 },
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44 other => panic!("Unknown PAM implementation {other:?}"),
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45 };
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46 generate_const_test(&config);
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47 }
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48
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49 fn generate_const_test(config: &TestConfig) {
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50 let mut builder = bindgen::Builder::default()
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51 .header_contents("_.h", &config.header_contents())
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52 .merge_extern_blocks(true)
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53 .parse_callbacks(Box::new(bindgen::CargoCallbacks::new()))
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54 .blocklist_type(".*")
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55 .blocklist_function(".*")
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56 .allowlist_var(".*")
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57 .default_macro_constant_type(MacroTypeVariation::Signed);
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58 for hdr in config.block_headers.iter() {
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59 builder = builder.blocklist_file(".*?/".to_owned() + hdr)
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60 }
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61
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62 let generated = builder.generate().unwrap().to_string();
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63 let file = syn::parse_file(&generated).unwrap();
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64 let mut tests = vec![];
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65 tests.push("{".into());
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66 tests.extend(
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67 file.items
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68 .iter()
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69 .filter_map(|item| {
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70 if let Item::Const(item) = item {
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71 Some(item)
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72 } else {
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73 None
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74 }
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75 })
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76 .filter(|item| config.should_check_const(item))
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77 .cloned()
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78 .map(|mut item| {
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79 item.ty = Box::new(Type::Path(TypePath {
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80 qself: None,
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81 path: format_ident!("i32").into(),
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82 }));
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83 format!(
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84 "assert_eq!({tokens}, libpam_sys::{name});",
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85 tokens = item.expr.to_token_stream(),
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86 name = item.ident
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87 )
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88 }),
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89 );
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90 tests.push("}".into());
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91 fs::write(
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92 PathBuf::from(env::var("OUT_DIR").unwrap()).join("constant_test.rs"),
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93 tests.join("\n"),
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94 )
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95 .unwrap();
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96 }
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97
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98 #[derive(Default)]
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99 struct TestConfig {
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100 headers: Vec<&'static str>,
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101 block_headers: Vec<&'static str>,
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102 ignore_consts: Vec<&'static str>,
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103 }
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104
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105 impl TestConfig {
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106 fn header_contents(&self) -> String {
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107 let vec: Vec<_> = self
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108 .headers
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109 .iter()
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110 .map(|h| format!("#include {h}\n"))
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111 .collect();
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112 vec.join("")
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113 }
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114
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115 fn should_check_const(&self, item: &ItemConst) -> bool {
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116 !self
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117 .ignore_consts
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118 .contains(&item.ident.to_string().as_ref())
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119 }
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120 }