261 lines
7.5 KiB
Rust
261 lines
7.5 KiB
Rust
extern crate rusty_keys;
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extern crate uinput_sys as ffi;
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extern crate libc;
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extern crate getopts;
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extern crate inotify;
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#[macro_use]
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extern crate nix;
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use rusty_keys::KeyMaps;
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use ffi::*;
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use libc::{c_int, input_event};
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//use std::thread;
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//use std::time::Duration;
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use std::process::{exit, Command};
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use std::fs::File;
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use std::io::Read;
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use std::{env, mem};
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use std::thread;
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use std::sync::mpsc;
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use std::os::unix::io::AsRawFd;
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use getopts::Options;
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use inotify::{
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EventMask,
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Inotify,
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WatchMask,
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};
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const VERSION: &'static str = env!("CARGO_PKG_VERSION");
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const EV_KEY_U16: u16 = EV_KEY as u16;
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#[derive(Debug)]
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struct Config {
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device_files: Vec<String>,
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config_file: String
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}
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impl Config {
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fn new(device_files: Vec<String>, config_file: String) -> Self {
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Config { device_files: device_files, config_file: config_file }
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}
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}
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fn main() {
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let config = parse_args();
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//println!("Config: {:?}", config);
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if config.device_files.len() > 0 {
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// we only want to operate on device files sent in then quit
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let (tx, rx) = mpsc::channel();
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for device_file in config.device_files.iter() {
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let device_file = device_file.clone();
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let config_file = config.config_file.clone();
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let tx = tx.clone();
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thread::spawn(move || {
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let ret = spawn_map_thread(&device_file, &config_file);
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if let Err(e) = ret {
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println!("mapping for {} ended due to error: {}", device_file, e);
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}
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tx.send(1).ok();
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});
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}
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// wait for all threads to finish
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let mut num_threads = config.device_files.len();
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for received in rx {
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num_threads -= received;
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if num_threads == 0 {
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break;
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}
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}
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} else {
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// we want to wait forever starting new threads for any new keyboard devices
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let mut inotify = Inotify::init().expect("Failed to initialize inotify");
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inotify.add_watch("/dev/input/", WatchMask::CREATE).expect("Failed to add inotify watch");
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let device_files = get_keyboard_device_filenames();
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println!("Detected devices: {:?}", device_files);
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for device_file in device_files.iter() {
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inotify_spawn_thread(device_file, config.config_file.clone());
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}
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let mut buffer = [0u8; 4096];
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loop {
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let events = inotify.read_events_blocking(&mut buffer);
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if let Ok(events) = events {
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for event in events {
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if !event.mask.contains(EventMask::ISDIR) {
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if let Some(name) = event.name {
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if let Some(device_file) = name.to_str() {
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// check if this is an eligible keyboard device
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let device_files = get_keyboard_device_filenames();
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if !device_files.contains(&device_file.to_string()) {
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continue;
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}
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println!("starting mapping thread for: {}", device_file);
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inotify_spawn_thread(device_file.clone(), config.config_file.clone());
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}
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}
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}
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}
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}
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}
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}
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}
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fn inotify_spawn_thread(device_file: &str, config_file: String) {
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let mut filename = "/dev/input/".to_string();
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filename.push_str(&device_file);
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thread::spawn(move || {
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let ret = spawn_map_thread(&filename, &config_file);
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if let Err(e) = ret {
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println!("mapping for {} ended due to error: {}", filename, e);
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}
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});
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}
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fn spawn_map_thread(device_file: &str, config_file: &str) -> Result<()> {
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let mut input_device = InputDevice::open(device_file)?;
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input_device.grab()?;
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let key_map = KeyMaps::key_map();
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//println!("key_map: {:?}", key_map);
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let device = rusty_keys::open("/dev/uinput")
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.or_else(|_| rusty_keys::open("/dev/input/uinput"))
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.or_else(|_| rusty_keys::default())?
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.name("rusty-keys")?
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.event(key_map.values())?
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.create()?;
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let mut key_map = KeyMaps::from_cfg(&key_map, config_file);
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//println!("keymaps: {:?}", keymaps);
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loop {
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let mut event = input_device.read_event()?;
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if event.type_ == EV_KEY_U16 {
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key_map.send_event(&mut event, &device)?
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} else {
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device.write_event(&mut event)?
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}
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}
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}
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fn parse_args() -> Config {
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fn print_usage(program: &str, opts: Options) {
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let brief = format!("Usage: {} [options] [device_files...]", program);
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println!("{}", opts.usage(&brief));
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}
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let args: Vec<_> = env::args().collect();
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let mut opts = Options::new();
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opts.optflag("h", "help", "prints this help message");
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opts.optflag("v", "version", "prints the version");
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opts.optopt("c", "config", "specify the keymap config file to use", "FILE");
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let matches = opts.parse(&args[1..]);
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if matches.is_err() {
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print_usage(&args[0], opts);
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exit(0);
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}
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let matches = matches.unwrap();
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if matches.opt_present("h") {
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print_usage(&args[0], opts);
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exit(0);
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}
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if matches.opt_present("v") {
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println!("rusty-keys {}", VERSION);
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exit(0);
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}
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let config_file = matches.opt_str("c").unwrap_or("/etc/rusty-keys/keymap.toml".to_owned());
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Config::new(matches.free, config_file)
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}
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// Detects and returns the name of the keyboard device file. This function uses
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// the fact that all device information is shown in /proc/bus/input/devices and
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// the keyboard device file should always have an EV of 120013
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fn get_keyboard_device_filenames() -> Vec<String> {
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let command_str = "grep -E 'Handlers|EV' /proc/bus/input/devices | grep -B1 120013 | grep -Eo event[0-9]+".to_string();
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let res = Command::new("sh").arg("-c").arg(command_str).output();
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if res.is_err() {
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return Vec::new();
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}
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let res = res.unwrap();
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let res_str = std::str::from_utf8(&res.stdout).unwrap_or("");
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let mut filenames = Vec::new();
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for file in res_str.trim().split('\n') {
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filenames.push(file.to_string());
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}
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filenames
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}
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// inputdevice stuff
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ioctl!(write eviocgrab with b'E', 0x90; c_int);
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// TODO: use size_of_input_event instead of hard-coding 24.
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const SIZE_OF_INPUT_EVENT: usize = 24;//mem::size_of::<input_event>();
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struct InputDevice {
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device_file: File,
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buf: [u8; SIZE_OF_INPUT_EVENT],
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}
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use rusty_keys::{Error,Result};
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impl InputDevice {
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pub fn open(device_file: &str) -> Result<Self> {
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let device_file = File::open(device_file)?;
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Ok(InputDevice {
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device_file: device_file,
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buf: [0u8; SIZE_OF_INPUT_EVENT],
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})
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}
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pub fn read_event(&mut self) -> Result<input_event> {
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let num_bytes = self.device_file.read(&mut self.buf)?;
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if num_bytes != SIZE_OF_INPUT_EVENT {
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return Err(Error::ShortRead);
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}
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let event: input_event = unsafe { mem::transmute(self.buf) };
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Ok(event)
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}
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pub fn grab(&mut self) -> Result<()> {
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unsafe {
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eviocgrab(self.device_file.as_raw_fd(), 1 as *const c_int)?;
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}
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Ok(())
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}
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pub fn release(&mut self) -> Result<()> {
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unsafe {
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eviocgrab(self.device_file.as_raw_fd(), 0 as *const c_int)?;
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}
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Ok(())
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}
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}
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impl Drop for InputDevice {
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fn drop(&mut self) {
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self.release().ok();
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}
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}
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