winreg
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======
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[cratesio]: https://crates.io/crates/winreg
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[docsrs]: https://docs.rs/winreg
Rust bindings to MS Windows Registry API. Work in progress.
Current features:
* Basic registry operations:
* open/create/delete/rename keys
* load application hive from a file
* read and write values
* seamless conversion between `REG_*` types and rust primitives
* `String` and `OsString` <= `REG_SZ`, `REG_EXPAND_SZ` or `REG_MULTI_SZ`
* `String`, `&str`, `OsString`, `&OsStr` => `REG_SZ`
* `Vec<String>`, `Vec<OsString>` <= `REG_MULTI_SZ`
* `Vec<String>`, `Vec<&str>`, `Vec<OsString>`, `Vec<&OsStr>` => `REG_MULTI_SZ`
* `u32` <=> `REG_DWORD`
* `u64` <=> `REG_QWORD`
* Iteration through key names and through values
* Transactions
* Transacted serialization of rust types into/from registry (only primitives, structures and maps for now)
## Usage
### Basic usage
```toml
# Cargo.toml
[dependencies]
winreg = "0.52"
```
```rust
use std::io;
use std::path::Path;
use winreg::enums::*;
use winreg::RegKey;
fn main() -> io::Result<()> {
println!("Reading some system info...");
let hklm = RegKey::predef(HKEY_LOCAL_MACHINE);
let cur_ver = hklm.open_subkey("SOFTWARE\\Microsoft\\Windows\\CurrentVersion")?;
let pf: String = cur_ver.get_value("ProgramFilesDir")?;
let dp: String = cur_ver.get_value("DevicePath")?;
println!("ProgramFiles = {}\nDevicePath = {}", pf, dp);
let info = cur_ver.query_info()?;
println!("info = {:?}", info);
let mt = info.get_last_write_time_system();
println!(
"last_write_time as windows_sys::Win32::Foundation::SYSTEMTIME = {}-{:02}-{:02} {:02}:{:02}:{:02}",
mt.wYear, mt.wMonth, mt.wDay, mt.wHour, mt.wMinute, mt.wSecond
);
// enable `chrono` feature on `winreg` to make this work
// println!(
// "last_write_time as chrono::NaiveDateTime = {}",
// info.get_last_write_time_chrono()
// );
println!("And now lets write something...");
let hkcu = RegKey::predef(HKEY_CURRENT_USER);
let path = Path::new("Software").join("WinregRsExample1");
let (key, disp) = hkcu.create_subkey(&path)?;
match disp {
REG_CREATED_NEW_KEY => println!("A new key has been created"),
REG_OPENED_EXISTING_KEY => println!("An existing key has been opened"),
}
key.set_value("TestSZ", &"written by Rust")?;
let sz_val: String = key.get_value("TestSZ")?;
key.delete_value("TestSZ")?;
println!("TestSZ = {}", sz_val);
key.set_value("TestMultiSZ", &vec!["written", "by", "Rust"])?;
let multi_sz_val: Vec<String> = key.get_value("TestMultiSZ")?;
key.delete_value("TestMultiSZ")?;
println!("TestMultiSZ = {:?}", multi_sz_val);
key.set_value("TestDWORD", &1234567890u32)?;
let dword_val: u32 = key.get_value("TestDWORD")?;
println!("TestDWORD = {}", dword_val);
key.set_value("TestQWORD", &1234567891011121314u64)?;
let qword_val: u64 = key.get_value("TestQWORD")?;
println!("TestQWORD = {}", qword_val);
key.create_subkey("sub\\key")?;
hkcu.delete_subkey_all(&path)?;
println!("Trying to open nonexistent key...");
hkcu.open_subkey(&path).unwrap_or_else(|e| match e.kind() {
io::ErrorKind::NotFound => panic!("Key doesn't exist"),
io::ErrorKind::PermissionDenied => panic!("Access denied"),
_ => panic!("{:?}", e),
});
Ok(())
}
```
### Iterators
```rust
use std::io;
use winreg::RegKey;
use winreg::enums::*;
fn main() -> io::Result<()> {
println!("File extensions, registered in system:");
for i in RegKey::predef(HKEY_CLASSES_ROOT)
.enum_keys().map(|x| x.unwrap())
.filter(|x| x.starts_with("."))
{
println!("{}", i);
}
let system = RegKey::predef(HKEY_LOCAL_MACHINE)
.open_subkey("HARDWARE\\DESCRIPTION\\System")?;
for (name, value) in system.enum_values().map(|x| x.unwrap()) {
println!("{} = {:?}", name, value);
}
Ok(())
}
```
### Transactions
```toml
# Cargo.toml
[dependencies]
winreg = { version = "0.52", features = ["transactions"] }
```
```rust
use std::io;
use winreg::RegKey;
use winreg::enums::*;
use winreg::transaction::Transaction;
fn main() -> io::Result<()> {
let t = Transaction::new()?;
let hkcu = RegKey::predef(HKEY_CURRENT_USER);
let (key, _disp) = hkcu.create_subkey_transacted("Software\\RustTransaction", &t)?;
key.set_value("TestQWORD", &1234567891011121314u64)?;
key.set_value("TestDWORD", &1234567890u32)?;
println!("Commit transaction? [y/N]:");
let mut input = String::new();
io::stdin().read_line(&mut input)?;
input = input.trim_right().to_owned();
if input == "y" || input == "Y" {
t.commit()?;
println!("Transaction committed.");
}
else {
// this is optional, if transaction wasn't committed,
// it will be rolled back on disposal
t.rollback()?;
println!("Transaction wasn't committed, it will be rolled back.");
}
Ok(())
}
```
### Serialization
```toml
# Cargo.toml
[dependencies]
winreg = { version = "0.52", features = ["serialization-serde"] }
serde = "1"
serde_derive = "1"
```
```rust
use serde_derive::{Deserialize, Serialize};
use std::collections::HashMap;
use std::error::Error;
use winreg::enums::*;
#[derive(Debug, Serialize, Deserialize, PartialEq)]
struct Coords {
x: u32,
y: u32,
}
#[derive(Debug, Serialize, Deserialize, PartialEq)]
struct Size {
w: u32,
h: u32,
}
#[derive(Debug, Serialize, Deserialize, PartialEq)]
struct Rectangle {
coords: Coords,
size: Size,
}
#[derive(Debug, Serialize, Deserialize, PartialEq)]
struct Test {
t_bool: bool,
t_u8: u8,
t_u16: u16,
t_u32: u32,
t_u64: u64,
t_usize: usize,
t_struct: Rectangle,
t_map: HashMap<String, u32>,
t_string: String,
#[serde(rename = "")] // empty name becomes the (Default) value in the registry
t_char: char,
t_i8: i8,
t_i16: i16,
t_i32: i32,
t_i64: i64,
t_isize: isize,
t_f64: f64,
t_f32: f32,
}
fn main() -> Result<(), Box<dyn Error>> {
let hkcu = winreg::RegKey::predef(HKEY_CURRENT_USER);
let (key, _disp) = hkcu.create_subkey("Software\\RustEncode")?;
let mut map = HashMap::new();
map.insert("".to_owned(), 0); // empty name becomes the (Default) value in the registry
map.insert("v1".to_owned(), 1);
map.insert("v2".to_owned(), 2);
map.insert("v3".to_owned(), 3);
let v1 = Test {
t_bool: false,
t_u8: 127,
t_u16: 32768,
t_u32: 123_456_789,
t_u64: 123_456_789_101_112,
t_usize: 1_234_567_891,
t_struct: Rectangle {
coords: Coords { x: 55, y: 77 },
size: Size { w: 500, h: 300 },
},
t_map: map,
t_string: "test 123!".to_owned(),
t_char: 'a',
t_i8: -123,
t_i16: -2049,
t_i32: 20100,
t_i64: -12_345_678_910,
t_isize: -1_234_567_890,
t_f64: -0.01,
t_f32: 3.15,
};
key.encode(&v1)?;
let v2: Test = key.decode()?;
println!("Decoded {:?}", v2);
println!("Equal to encoded: {:?}", v1 == v2);
Ok(())
}
```