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comparison src/libpam/memory.rs @ 100:3f11b8d30f63

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Implement environment variable management. This actually wires up the environment variable handling to libpam, so that applications and modules can manage the environment through the authentication process.
author Paul Fisher <paul@pfish.zone>
date Tue, 24 Jun 2025 17:08:01 -0400
parents b87100c5eed4
children
comparison
equal deleted inserted replaced
99:8840fa6534f6 100:3f11b8d30f63
4 use crate::{BinaryData, ErrorCode}; 4 use crate::{BinaryData, ErrorCode};
5 use std::error::Error; 5 use std::error::Error;
6 use std::ffi::{c_char, CStr, CString}; 6 use std::ffi::{c_char, CStr, CString};
7 use std::fmt::{Display, Formatter, Result as FmtResult}; 7 use std::fmt::{Display, Formatter, Result as FmtResult};
8 use std::marker::{PhantomData, PhantomPinned}; 8 use std::marker::{PhantomData, PhantomPinned};
9 use std::mem::offset_of; 9 use std::mem::{offset_of, ManuallyDrop};
10 use std::ops::{Deref, DerefMut}; 10 use std::ops::{Deref, DerefMut};
11 use std::ptr::NonNull; 11 use std::ptr::NonNull;
12 use std::result::Result as StdResult; 12 use std::result::Result as StdResult;
13 use std::{mem, ptr, slice}; 13 use std::{mem, ptr, slice};
14 14
94 Self(ptr) 94 Self(ptr)
95 } 95 }
96 96
97 /// Converts this CBox into a raw pointer. 97 /// Converts this CBox into a raw pointer.
98 pub fn into_ptr(this: Self) -> NonNull<T> { 98 pub fn into_ptr(this: Self) -> NonNull<T> {
99 let ret = this.0; 99 ManuallyDrop::new(this).0
100 mem::forget(this);
101 ret
102 } 100 }
103 101
104 /// Gets a pointer from this but doesn't convert this into a raw pointer. 102 /// Gets a pointer from this but doesn't convert this into a raw pointer.
105 /// 103 ///
106 /// You are responsible for ensuring the CHeapBox lives long enough. 104 /// You are responsible for ensuring the CHeapBox lives long enough.
175 173
176 /// Converts this C heap string into a raw pointer. 174 /// Converts this C heap string into a raw pointer.
177 /// 175 ///
178 /// You are responsible for freeing it later. 176 /// You are responsible for freeing it later.
179 pub fn into_ptr(self) -> NonNull<c_char> { 177 pub fn into_ptr(self) -> NonNull<c_char> {
180 let ptr = CHeapBox::as_ptr(&self.0); 178 let this = ManuallyDrop::new(self);
181 mem::forget(self); 179 CHeapBox::as_ptr(&this.0)
182 ptr
183 } 180 }
184 181
185 /// Converts this into a dumb box. It will no longer be zeroed upon drop. 182 /// Converts this into a dumb box. It will no longer be zeroed upon drop.
186 pub fn into_box(self) -> CHeapBox<c_char> { 183 pub fn into_box(self) -> CHeapBox<c_char> {
187 unsafe { mem::transmute(self) } 184 unsafe { mem::transmute(self) }