winreg

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

Currently it can:

• open registry key
• create key
• query key metadata
• delete key
• delete key recursively
• read String from REG_SZ, REG_EXPAND_SZ or REG_MULTI_SZ value
• read u32 from REG_DWORD value
• read u64 from REG_QWORD value
• read raw value of any type to RegValue structure
• write String and &str into REG_SZ value
• write u32 into REG_DWORD value
• write u64 into REG_QWORD value
• write raw value of any type from RegValue structure
• iterate through subkey names
• iterate through values

Usage

Basic usage:

extern crate winreg;
use std::path::Path;
use winreg::RegKey;
use winreg::enums::*;

fn main() {
    println!("Reading some system info...");
    let hklm = RegKey::predef(HKEY_LOCAL_MACHINE);
    let cur_ver = hklm.open_subkey_with_flags("SOFTWARE\\Microsoft\\Windows\\CurrentVersion",
        KEY_READ).unwrap();
    let pf: String = cur_ver.get_value("ProgramFilesDir").unwrap();
    let dp: String = cur_ver.get_value("DevicePath").unwrap();
    println!("ProgramFiles = {}\nDevicePath = {}", pf, dp);
    let info = cur_ver.query_info().unwrap();
    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 = hkcu.create_subkey(&path).unwrap();

    key.set_value("TestSZ", &"written by Rust").unwrap();
    let sz_val: String = key.get_value("TestSZ").unwrap();
    key.delete_value("TestSZ").unwrap();
    println!("TestSZ = {}", sz_val);

    key.set_value("TestDWORD", &1234567890u32).unwrap();
    let dword_val: u32 = key.get_value("TestDWORD").unwrap();
    println!("TestDWORD = {}", dword_val);

    key.set_value("TestQWORD", &1234567891011121314u64).unwrap();
    let qword_val: u64 = key.get_value("TestQWORD").unwrap();
    println!("TestQWORD = {}", qword_val);

    key.create_subkey("sub\\key").unwrap();
    hkcu.delete_subkey_all(&path).unwrap();

    println!("Trying to open nonexisting key...");
    println!("{:?}", hkcu.open_subkey(&path).unwrap_err());
}

Iterators:

extern crate winreg;
use winreg::RegKey;
use winreg::enums::*;

fn main() {
    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_with_flags("HARDWARE\\DESCRIPTION\\System", KEY_READ)
        .unwrap();
    for (name, value) in system.enum_values().map(|x| x.unwrap()) {
        println!("{} = {:?}", name, value);
    }
}