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use crate::syslog::Priority;
use core::marker::{PhantomData, PhantomPinned};
use std::ffi::{c_char, c_int, CStr, CString};
#[repr(C)]
pub struct PAMHandle {
_data: [u8; 0],
_marker: PhantomData<(*mut u8, PhantomPinned)>,
}
pub const SUCCESS: c_int = 0;
pub const SESSION_ERR: c_int = 14;
pub const IGNORE: c_int = 25;
extern "C" {
fn pam_get_user(
pamh: *const PAMHandle,
user: &*const c_char,
prompt: *const c_char,
) -> c_int;
fn pam_syslog(pamh: *const PAMHandle, priority: c_int, fmt: *const c_char, ...);
}
impl PAMHandle {
pub fn get_user<S: AsRef<CStr> + ?Sized>(
&self,
prompt: Option<&S>,
) -> Result<CString, c_int> {
let ptr: *const c_char = std::ptr::null_mut();
let prompt = match prompt {
Some(prompt) => prompt.as_ref().as_ptr(),
None => core::ptr::null(),
};
match unsafe { pam_get_user(self, &ptr, prompt) } {
SUCCESS if !ptr.is_null() => {
let cstr = unsafe { CStr::from_ptr(ptr) };
Ok(CString::from(cstr))
}
e => Err(e),
}
}
pub fn syslog<S: AsRef<CStr> + ?Sized>(&self, priority: Priority, entry: &S) {
let Ok(fmt) = CString::new("%s") else { return };
let entry = entry.as_ref();
unsafe { pam_syslog(self, priority.into(), fmt.as_ptr(), entry.as_ptr()) }
}
}
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