Crate winreg

Crate for accessing MS Windows registry

Usage

Basic usage

# Cargo.toml
[dependencies]
winreg = "0.5"

extern crate winreg;
use std::path::Path;
use std::io;
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("SOFTWARE\\Microsoft\\Windows\\CurrentVersion").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 nonexistent key...");
    let key2 = 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)
    });
}

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

Modules

enums	use winreg::enums::*; to import all needed enumerations and constants
types	Traits for loading/saving Registry values

Structs

EnumKeys	Iterator over subkeys names
EnumValues	Iterator over values
RegKey	Handle of opened registry key
RegKeyMetadata	Metadata returned by RegKey::query_info
RegValue	Raw registry value

Type Definitions

HKEY