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annotate build.rs @ 105:13b4d2a19674

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Support Rust v1.75.0. This is the version included in Ubuntu 24.04 LTS and Debian Trixie, so it's old enough to have wide penetration without being too old to get new features (Debian Stable, I love you but v1.63 is just not going to work out).
author Paul Fisher <paul@pfish.zone>
date Thu, 26 Jun 2025 00:48:51 -0400
parents 3f11b8d30f63
children e97534be35e3
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1 use bindgen::MacroTypeVariation;
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2 use std::env;
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3 use std::path::PathBuf;
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4
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5 fn main() {
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6 if cfg!(feature = "link") {
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7 println!("cargo:rustc-link-lib=pam");
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8 println!("cargo:rustc-check-cfg=cfg(pam_impl, values(\"linux-pam\",\"openpam\"))");
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9 let common_builder = bindgen::Builder::default()
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10 .merge_extern_blocks(true)
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11 .parse_callbacks(Box::new(bindgen::CargoCallbacks::new()))
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12 .blocklist_type("pam_handle")
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13 .blocklist_type("pam_conv")
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14 .allowlist_var(".*")
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15 .allowlist_function("pam_start")
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16 .allowlist_function("pam_[gs]et_item")
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17 .allowlist_function("pam_get_(user|authtok)")
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18 .allowlist_function("pam_end")
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19 .allowlist_function("pam_strerror")
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20 .allowlist_function("pam_authenticate")
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21 .allowlist_function("pam_chauthtok")
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22 .allowlist_function("pam_acct_mgmt")
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23 .allowlist_function("pam_(ge|pu)tenv(list)?")
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24 .default_macro_constant_type(MacroTypeVariation::Unsigned);
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25
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26 let linux_builder = common_builder
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27 .clone()
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28 // This function is not available in OpenPAM.
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29 // That means if somebody tries to run a binary compiled for
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30 // Linux-PAM against a different impl, it will fail.
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31 .allowlist_function("pam_syslog")
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32 .header_contents(
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33 "linux-pam.h",
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34 r#"
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35 #include <syslog.h> // for log levels
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36 #include <security/_pam_types.h>
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37 #include <security/pam_appl.h>
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38 #include <security/pam_ext.h>
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39 #include <security/pam_modules.h>
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40 "#,
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41 );
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42 let openpam_builder = common_builder
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43 .clone()
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44 // This function is not available in Linux-PAM.
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45 // That means if somebody tries to run a binary compiled for
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46 // OpenPAM against a different impl, it will fail.
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47 .allowlist_function("openpam_log")
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48 .header_contents(
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49 "openpam.h",
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50 r#"
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51 #include <security/pam_types.h>
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52 #include <security/openpam.h>
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53 #include <security/pam_appl.h>
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54 #include <security/pam_constants.h>
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55 "#,
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56 );
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57
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58 let (pam_impl, bindings) = {
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59 if let Ok(bindings) = linux_builder.generate() {
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60 ("linux-pam", bindings)
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61 } else if let Ok(bindings) = openpam_builder.generate() {
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62 ("openpam", bindings)
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63 } else {
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64 panic!("unrecognized PAM implementation")
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65 }
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66 };
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67 println!("cargo:rustc-cfg=pam_impl={pam_impl:?}");
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68 let out_path = PathBuf::from(env::var("OUT_DIR").unwrap());
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69 bindings
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70 .write_to_file(out_path.join("bindings.rs"))
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71 .unwrap();
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72 }
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73 }