env: fix module

Squashed commit of the following:

commit 7a3af02
Author: Fabrice Desclaux <fabrice.desclaux@cea.fr>
Date:   Mon May 9 13:54:32 2022 +0200

    Set pam env in local process

commit 5564ad8
Author: Fabrice Desclaux <fabrice.desclaux@cea.fr>
Date:   Mon May 9 13:54:12 2022 +0200

    Fix env module

1wilkens#30

Co-authored-by: Fabrice Desclaux <fabrice.desclaux@cea.fr>

src/client.rs

@@ -1,7 +1,7 @@
 //! Authentication related structure and functions
 use std::{env, ffi::CStr, os::raw::c_char};
 
-use crate::{conv, enums::*, functions::*, types::*};
+use crate::{conv, enums::*, functions::*, types::*, env::*};
 
 /// Main struct to authenticate a user
 ///
@@ -157,6 +157,14 @@ impl<'a, C: conv::Conversation> Client<'a, C> {
     fn initialize_environment(&mut self) -> PamResult<()> {
         use uzers::os::unix::UserExt;
 
+	// Set PAM environment in the local process
+        if let Some(mut env_list) = get_pam_env(self.handle) {
+	    let env = env_list.to_vec();
+	    for (key, value) in env {
+                env::set_var(&key, &value);
+	    }
+        }
+
         let user = uzers::get_user_by_name(&self.get_user()?).unwrap_or_else(|| {
             panic!(
                 "Could not get user by name: {:?}",

src/env.rs

@@ -1,5 +1,7 @@
 use libc::c_char;
 use memchr::memchr;
+use crate::types::*;
+use pam_sys as raw;
 
 use std::vec::IntoIter;
 use std::ffi::{CStr, OsString};
@@ -19,6 +21,17 @@ impl Iterator for PamEnvList {
     }
 }
 
+pub fn get_pam_env(handle: &mut PamHandle) -> Option<PamEnvList> {
+    let env = unsafe {
+        raw::pam_getenvlist(handle)
+    };
+    if !env.is_null() {
+        Some(PamEnvList::from_ptr(env as *const *const c_char))
+    } else {
+        None
+    }
+}
+
 impl PamEnvList {
     pub(crate) fn from_ptr(ptr: *const *const c_char) -> PamEnvList {
         let mut result = Vec::new();

src/lib.rs

@@ -17,6 +17,7 @@ mod enums;
 mod env;
 mod functions;
 mod types;
+mod env;
 
 pub use crate::{enums::*, functions::*, types::*};