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// Copyright 2016 Joe Wilm, The Alacritty Project Contributors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
use super::{Pty, HANDLE};
use std::fs::OpenOptions;
use std::io;
use std::os::windows::fs::OpenOptionsExt;
use std::os::windows::io::{FromRawHandle, IntoRawHandle};
use std::sync::Arc;
use std::u16;
use dunce::canonicalize;
use mio_named_pipes::NamedPipe;
use winapi::um::winbase::FILE_FLAG_OVERLAPPED;
use winpty::Config as WinptyConfig;
use winpty::{ConfigFlags, MouseMode, SpawnConfig, SpawnFlags, Winpty};
use crate::cli::Options;
use crate::config::{Config, Shell};
use crate::display::OnResize;
use crate::term::SizeInfo;
// We store a raw pointer because we need mutable access to call
// on_resize from a separate thread. Winpty internally uses a mutex
// so this is safe, despite outwards appearance.
pub struct Agent<'a> {
winpty: *mut Winpty<'a>,
}
/// Handle can be cloned freely and moved between threads.
pub type WinptyHandle<'a> = Arc<Agent<'a>>;
// Because Winpty has a mutex, we can do this.
unsafe impl<'a> Send for Agent<'a> {}
unsafe impl<'a> Sync for Agent<'a> {}
impl<'a> Agent<'a> {
pub fn new(winpty: Winpty<'a>) -> Self {
Self { winpty: Box::into_raw(Box::new(winpty)) }
}
/// Get immutable access to Winpty.
pub fn winpty(&self) -> &Winpty<'a> {
unsafe { &*self.winpty }
}
pub fn resize(&self, size: &SizeInfo) {
// This is safe since Winpty uses a mutex internally.
unsafe {
(&mut *self.winpty).on_resize(size);
}
}
}
impl<'a> Drop for Agent<'a> {
fn drop(&mut self) {
unsafe {
Box::from_raw(self.winpty);
}
}
}
/// How long the winpty agent should wait for any RPC request
/// This is a placeholder value until we see how often long responses happen
const AGENT_TIMEOUT: u32 = 10000;
pub fn new<'a>(
config: &Config,
options: &Options,
size: &SizeInfo,
_window_id: Option<usize>,
) -> Pty<'a> {
// Create config
let mut wconfig = WinptyConfig::new(ConfigFlags::empty()).unwrap();
wconfig.set_initial_size(size.cols().0 as i32, size.lines().0 as i32);
wconfig.set_mouse_mode(&MouseMode::Auto);
wconfig.set_agent_timeout(AGENT_TIMEOUT);
// Start agent
let mut winpty = Winpty::open(&wconfig).unwrap();
let (conin, conout) = (winpty.conin_name(), winpty.conout_name());
// Get process commandline
let default_shell = &Shell::new("powershell");
let shell = config.shell().unwrap_or(default_shell);
let initial_command = options.command().unwrap_or(shell);
let mut cmdline = initial_command.args().to_vec();
cmdline.insert(0, initial_command.program().into());
// Warning, here be borrow hell
let cwd = options.working_dir.as_ref().map(|dir| canonicalize(dir).unwrap());
let cwd = cwd.as_ref().map(|dir| dir.to_str().unwrap());
// Spawn process
let spawnconfig = SpawnConfig::new(
SpawnFlags::AUTO_SHUTDOWN | SpawnFlags::EXIT_AFTER_SHUTDOWN,
None, // appname
Some(&cmdline.join(" ")),
cwd,
None, // Env
)
.unwrap();
let default_opts = &mut OpenOptions::new();
default_opts.share_mode(0).custom_flags(FILE_FLAG_OVERLAPPED);
let (conout_pipe, conin_pipe);
unsafe {
conout_pipe = NamedPipe::from_raw_handle(
default_opts.clone().read(true).open(conout).unwrap().into_raw_handle(),
);
conin_pipe = NamedPipe::from_raw_handle(
default_opts.clone().write(true).open(conin).unwrap().into_raw_handle(),
);
};
if let Some(err) = conout_pipe.connect().err() {
if err.kind() != io::ErrorKind::WouldBlock {
panic!(err);
}
}
assert!(conout_pipe.take_error().unwrap().is_none());
if let Some(err) = conin_pipe.connect().err() {
if err.kind() != io::ErrorKind::WouldBlock {
panic!(err);
}
}
assert!(conin_pipe.take_error().unwrap().is_none());
winpty.spawn(&spawnconfig).unwrap();
unsafe {
HANDLE = winpty.raw_handle();
}
let agent = Agent::new(winpty);
Pty {
handle: super::PtyHandle::Winpty(WinptyHandle::new(agent)),
conout: super::EventedReadablePipe::Named(conout_pipe),
conin: super::EventedWritablePipe::Named(conin_pipe),
read_token: 0.into(),
write_token: 0.into(),
}
}
impl<'a> OnResize for Winpty<'a> {
fn on_resize(&mut self, sizeinfo: &SizeInfo) {
let (cols, lines) = (sizeinfo.cols().0, sizeinfo.lines().0);
if cols > 0 && cols <= u16::MAX as usize && lines > 0 && lines <= u16::MAX as usize {
self.set_size(cols as u16, lines as u16)
.unwrap_or_else(|_| info!("Unable to set winpty size, did it die?"));
}
}
}
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