Fwd: [PATCH proxmox-datacenter-manager] cli/proxmox-fido2: fix mismatched type on other arches

[Luke Yasuda <jing@jing.rocks>]

Subject: [PATCH proxmox-datacenter-manager] cli/proxmox-fido2: fix 
mismatched type on other arches
Date: 2026-10-21 21:51
 From: Luke Yasuda <jing@jing.rocks>
To: pve-devel@lists.proxmox.com
Cc: Luke Yasuda <jing@jing.rocks>

This fixes FTBFS on non-amd64 platforms: mismatched types, expected u8
but got i8.
---
(resend, sent to the wrong list)
This is more like an RFC, and I have little experience in rust
and don't know what I'm doing, but it builds and passes the tests.
---
  cli/proxmox-fido2/src/lib.rs | 32 ++++++++++++++++----------------
  1 file changed, 16 insertions(+), 16 deletions(-)

diff --git a/cli/proxmox-fido2/src/lib.rs b/cli/proxmox-fido2/src/lib.rs
index afed3496..5413b9c0 100644
--- a/cli/proxmox-fido2/src/lib.rs
+++ b/cli/proxmox-fido2/src/lib.rs
@@ -1,5 +1,5 @@
  use std::error::Error as StdError;
-use std::ffi::{CStr, CString, OsStr, c_int, c_void};
+use std::ffi::{CStr, CString, OsStr, c_int, c_void, c_char};
  use std::fmt;
  use std::path::{Path, PathBuf};
  use std::sync::{Arc, Mutex};
@@ -92,7 +92,7 @@ impl Dl {
  pub struct Lib {
      _lib: Dl,
      fido_init: extern "C" fn(c_int),
-    fido_strerr: extern "C" fn(c_int) -> *const i8,
+    fido_strerr: extern "C" fn(c_int) -> *const c_char,

      fido_dev_new: extern "C" fn() -> *mut c_void,
      fido_dev_free: extern "C" fn(&mut *mut c_void),
@@ -101,22 +101,22 @@ pub struct Lib {
      fido_dev_cancel: extern "C" fn(*mut c_void),
      fido_dev_is_fido2: extern "C" fn(*mut c_void) -> c_int,
      fido_dev_get_cbor_info: extern "C" fn(*mut c_void, *mut c_void) -> 
c_int,
-    fido_dev_make_cred: extern "C" fn(*mut c_void, *mut c_void, *const 
i8) -> c_int,
-    fido_dev_get_assert: extern "C" fn(*mut c_void, *mut c_void, *const 
i8) -> c_int,
+    fido_dev_make_cred: extern "C" fn(*mut c_void, *mut c_void, *const 
c_char) -> c_int,
+    fido_dev_get_assert: extern "C" fn(*mut c_void, *mut c_void, *const 
c_char) -> c_int,

      fido_dev_info_new: extern "C" fn(libc::size_t) -> *mut c_void,
      fido_dev_info_free: extern "C" fn(&mut *mut c_void, libc::size_t),
      fido_dev_info_manifest: extern "C" fn(*mut c_void, libc::size_t, 
*mut libc::size_t) -> c_int,
      fido_dev_info_ptr: extern "C" fn(*mut c_void, libc::size_t) -> *mut 
c_void,
-    fido_dev_info_manufacturer_string: extern "C" fn(*mut c_void) -> 
*const i8,
-    fido_dev_info_path: extern "C" fn(*mut c_void) -> *const i8,
-    fido_dev_info_product_string: extern "C" fn(*mut c_void) -> *const 
i8,
+    fido_dev_info_manufacturer_string: extern "C" fn(*mut c_void) -> 
*const c_char,
+    fido_dev_info_path: extern "C" fn(*mut c_void) -> *const c_char,
+    fido_dev_info_product_string: extern "C" fn(*mut c_void) -> *const 
c_char,
      fido_dev_get_touch_begin: extern "C" fn(*mut c_void) -> c_int,
      fido_dev_get_touch_status: extern "C" fn(*mut c_void, *mut c_int, 
c_int) -> c_int,

      fido_cbor_info_new: extern "C" fn() -> *mut c_void,
      fido_cbor_info_free: extern "C" fn(&mut *mut c_void),
-    fido_cbor_info_extensions_ptr: extern "C" fn(*mut c_void) -> *const 
*const i8,
+    fido_cbor_info_extensions_ptr: extern "C" fn(*mut c_void) -> *const 
*const c_char,
      fido_cbor_info_extensions_len: extern "C" fn(*mut c_void) -> 
libc::size_t,
      fido_cbor_info_options_name_ptr: extern "C" fn(*mut c_void) -> 
*const *const i8,
      fido_cbor_info_options_value_ptr: extern "C" fn(*mut c_void) -> 
*const i8,
@@ -126,16 +126,16 @@ pub struct Lib {
      fido_cred_free: extern "C" fn(&mut *mut c_void),
      fido_cred_exclude: extern "C" fn(*mut c_void, *const u8, 
libc::size_t) -> c_int,
      fido_cred_set_extensions: extern "C" fn(*mut c_void, c_int) -> 
c_int,
-    fido_cred_set_rp: extern "C" fn(*mut c_void, *const i8, *const i8) 
-> c_int,
-    fido_cred_set_fmt: extern "C" fn(*mut c_void, *const i8) -> c_int,
+    fido_cred_set_rp: extern "C" fn(*mut c_void, *const c_char, *const 
c_char) -> c_int,
+    fido_cred_set_fmt: extern "C" fn(*mut c_void, *const c_char) -> 
c_int,
      fido_cred_set_type: extern "C" fn(*mut c_void, c_int) -> c_int,
      fido_cred_set_user: extern "C" fn(
          *mut c_void,
          *const u8,
          libc::size_t,
-        *const i8,
-        *const i8,
-        *const i8,
+        *const c_char,
+        *const c_char,
+        *const c_char,
      ) -> c_int,
      fido_cred_set_clientdata_hash: extern "C" fn(*mut c_void, *const 
u8, libc::size_t) -> c_int,
      fido_cred_set_rk: extern "C" fn(*mut c_void, FidoOpt) -> c_int,
@@ -154,7 +154,7 @@ pub struct Lib {
      fido_assert_free: extern "C" fn(&mut *mut c_void),
      fido_assert_set_extensions: extern "C" fn(*mut c_void, c_int) -> 
c_int,
      fido_assert_set_hmac_salt: extern "C" fn(*mut c_void, *const u8, 
libc::size_t) -> c_int,
-    fido_assert_set_rp: extern "C" fn(*mut c_void, *const i8) -> c_int,
+    fido_assert_set_rp: extern "C" fn(*mut c_void, *const c_char) -> 
c_int,
      fido_assert_set_clientdata_hash: extern "C" fn(*mut c_void, *const 
u8, libc::size_t) -> c_int,
      fido_assert_allow_cred: extern "C" fn(*mut c_void, *const u8, 
libc::size_t) -> c_int,
      fido_assert_set_up: extern "C" fn(*mut c_void, FidoOpt) -> c_int,
@@ -692,7 +692,7 @@ impl FidoDev {
          let extensions = 
(self.lib.fido_cbor_info_extensions_ptr)(info.info);
          if !extensions.is_null() {
              let len = 
(self.lib.fido_cbor_info_extensions_len)(info.info);
-            let extensions = unsafe { 
std::slice::from_raw_parts(extensions as *const &i8, len) };
+            let extensions = unsafe { 
std::slice::from_raw_parts(extensions as *const &c_char, len) };
              for ext in extensions {
                  let name = unsafe { CStr::from_ptr(*ext) };
                  if name.to_bytes() == b"hmac-secret" {
@@ -712,7 +712,7 @@ impl FidoDev {
              let len = (self.lib.fido_cbor_info_options_len)(info.info);

              let option_names =
-                unsafe { std::slice::from_raw_parts(option_names as 
*const &i8, len) };
+                unsafe { std::slice::from_raw_parts(option_names as 
*const &c_char, len) };
              let option_values = unsafe { 
std::slice::from_raw_parts(option_values, len) };

              for (name, value) in std::iter::zip(option_names, 
option_values) {