14 releases

0.5.1 Jun 1, 2018
0.5.0 Dec 18, 2017
0.4.0 Oct 31, 2016
0.3.5 Apr 24, 2016
0.3.1 Jul 16, 2015

#17 in Windows APIs

Download history 1559/week @ 2018-09-18 1546/week @ 2018-09-25 1936/week @ 2018-10-02 2044/week @ 2018-10-09 1863/week @ 2018-10-16 2613/week @ 2018-10-23 2759/week @ 2018-10-30 2300/week @ 2018-11-06 2611/week @ 2018-11-13 3112/week @ 2018-11-20 2109/week @ 2018-11-27 3107/week @ 2018-12-04 3135/week @ 2018-12-11

4,498 downloads per month
Used in 120 crates (20 directly)

MIT license

83KB
1.5K SLoC

winreg Crates.io Build status

Rust bindings to MS Windows Registry API. Work in progress.

Current features:

  • Basic registry operations:
    • open/create/delete keys
    • 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 and OsStr => REG_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 and structures for now)

Usage

Basic usage

# Cargo.toml
[dependencies]
winreg = "0.6"
extern crate winreg;
use std::path::Path;
use std::io;
use winreg::RegKey;
use winreg::enums::*;

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);

    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("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

extern crate winreg;
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

# Cargo.toml
[dependencies]
winreg = { version = "0.6", features = ["transactions"] }
extern crate winreg;
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

# Cargo.toml
[dependencies]
winreg = { version = "0.6", features = ["serialization-serde"] }
serde = "1"
serde_derive = "1"
#[macro_use]
extern crate serde_derive;
extern crate winreg;
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_string: String,
    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<Error>> {
    let hkcu = winreg::RegKey::predef(HKEY_CURRENT_USER);
    let (key, _disp) = hkcu.create_subkey("Software\\RustEncode")?;
    let v1 = Test{
        t_bool: false,
        t_u8: 127,
        t_u16: 32768,
        t_u32: 123456789,
        t_u64: 123456789101112,
        t_usize: 1234567891,
        t_struct: Rectangle{
            coords: Coords{ x: 55, y: 77 },
            size: Size{ w: 500, h: 300 },
        },
        t_string: "test 123!".to_owned(),
        t_i8: -123,
        t_i16: -2049,
        t_i32: 20100,
        t_i64: -12345678910,
        t_isize: -1234567890,
        t_f64: -0.01,
        t_f32: 3.14,
    };

    key.encode(&v1)?;

    let v2: Test = key.decode()?;
    println!("Decoded {:?}", v2);

    println!("Equal to encoded: {:?}", v1 == v2);
    Ok(())
}

Changelog

0.6.0

  • Breaking change: create_subkey, create_subkey_with_flags, create_subkey_transacted and create_subkey_transacted_with_flags now return a tuple which contains the subkey and its disposition which can be REG_CREATED_NEW_KEY or REG_OPENED_EXISTING_KEY (#21).
  • Examples fixed to not use unwrap according to Rust API guidelines.

0.5.1

  • Reexport HKEY (#15).
  • Add raw_handle method (#18).

0.5.0

  • Breaking change: open_subkey now opens a key with readonly permissions. Use create_subkey or open_subkey_with_flags to open with read-write permissins.
  • Breaking change: features transactions and serialization-serde are now disabled by default.
  • Breaking change: serialization now uses serde instead of rustc-serialize.
  • winapi updated to 0.3.
  • Documentation fixes (#14)

0.4.0

  • Make transactions and serialization otional features
  • Update dependensies + minor fixes (#12)

0.3.5

  • Implement FromRegValue for OsString and ToRegValue for OsStr (#8)
  • Minor fixes

0.3.4

  • Add copy_tree method to RegKey
  • Now checked with rust-clippy
    • no more unwraps
    • replaced to_string with to_owned
  • Fix: reading strings longer than 2048 characters (#6)

0.3.3

  • Fix: now able to read values longer than 2048 bytes (#3)

0.3.2

  • Fix: FromRegValue trait now requires Sized (fixes build with rust 1.4)

0.3.1

  • Fix: bump winapi version to fix build

0.3.0

  • Add transactions support and make serialization transacted
  • Breaking change: use std::io::{Error,Result} instead of own RegError and RegResult

Dependencies

~624KB

  • winapi 0.3+minwindef+winerror+winnt+winreg+handleapi
  • optional clippy 0.0
  • serialization-serde? serde 1.0