mirror of
https://github.com/denoland/deno.git
synced 2024-11-16 16:53:20 -05:00
324 lines
9.1 KiB
Rust
324 lines
9.1 KiB
Rust
// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
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use super::io::std_file_resource;
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use super::io::StreamResource;
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use super::io::StreamResourceHolder;
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use deno_core::error::bad_resource_id;
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use deno_core::error::last_os_error;
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use deno_core::error::resource_unavailable;
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use deno_core::error::AnyError;
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use deno_core::serde_json;
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use deno_core::serde_json::json;
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use deno_core::serde_json::Value;
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use deno_core::OpState;
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use deno_core::ZeroCopyBuf;
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use serde::Deserialize;
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use serde::Serialize;
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#[cfg(unix)]
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use deno_core::error::not_supported;
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#[cfg(unix)]
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use nix::sys::termios;
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#[cfg(windows)]
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use deno_core::error::custom_error;
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#[cfg(windows)]
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use winapi::shared::minwindef::DWORD;
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#[cfg(windows)]
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use winapi::um::wincon;
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#[cfg(windows)]
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const RAW_MODE_MASK: DWORD = wincon::ENABLE_LINE_INPUT
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| wincon::ENABLE_ECHO_INPUT
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| wincon::ENABLE_PROCESSED_INPUT;
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#[cfg(windows)]
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fn get_windows_handle(
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f: &std::fs::File,
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) -> Result<std::os::windows::io::RawHandle, AnyError> {
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use std::os::windows::io::AsRawHandle;
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use winapi::um::handleapi;
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let handle = f.as_raw_handle();
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if handle == handleapi::INVALID_HANDLE_VALUE {
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return Err(last_os_error());
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} else if handle.is_null() {
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return Err(custom_error("ReferenceError", "null handle"));
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}
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Ok(handle)
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}
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pub fn init(rt: &mut deno_core::JsRuntime) {
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super::reg_json_sync(rt, "op_set_raw", op_set_raw);
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super::reg_json_sync(rt, "op_isatty", op_isatty);
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super::reg_json_sync(rt, "op_console_size", op_console_size);
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}
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#[derive(Deserialize)]
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struct SetRawArgs {
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rid: u32,
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mode: bool,
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}
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fn op_set_raw(
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state: &mut OpState,
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args: Value,
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_zero_copy: &mut [ZeroCopyBuf],
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) -> Result<Value, AnyError> {
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super::check_unstable(state, "Deno.setRaw");
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let args: SetRawArgs = serde_json::from_value(args)?;
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let rid = args.rid;
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let is_raw = args.mode;
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// From https://github.com/kkawakam/rustyline/blob/master/src/tty/windows.rs
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// and https://github.com/kkawakam/rustyline/blob/master/src/tty/unix.rs
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// and https://github.com/crossterm-rs/crossterm/blob/e35d4d2c1cc4c919e36d242e014af75f6127ab50/src/terminal/sys/windows.rs
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// Copyright (c) 2015 Katsu Kawakami & Rustyline authors. MIT license.
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// Copyright (c) 2019 Timon. MIT license.
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#[cfg(windows)]
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{
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use std::os::windows::io::AsRawHandle;
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use winapi::shared::minwindef::FALSE;
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use winapi::um::{consoleapi, handleapi};
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let resource_holder =
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state.resource_table.get_mut::<StreamResourceHolder>(rid);
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if resource_holder.is_none() {
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return Err(bad_resource_id());
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}
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let resource_holder = resource_holder.unwrap();
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// For now, only stdin.
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let handle = match &mut resource_holder.resource {
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StreamResource::FsFile(ref mut option_file_metadata) => {
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if let Some((tokio_file, metadata)) = option_file_metadata.take() {
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match tokio_file.try_into_std() {
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Ok(std_file) => {
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let raw_handle = std_file.as_raw_handle();
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// Turn the std_file handle back into a tokio file, put it back
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// in the resource table.
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let tokio_file = tokio::fs::File::from_std(std_file);
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resource_holder.resource =
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StreamResource::FsFile(Some((tokio_file, metadata)));
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// return the result.
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raw_handle
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}
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Err(tokio_file) => {
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// This function will return an error containing the file if
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// some operation is in-flight.
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resource_holder.resource =
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StreamResource::FsFile(Some((tokio_file, metadata)));
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return Err(resource_unavailable());
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}
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}
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} else {
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return Err(resource_unavailable());
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}
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}
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_ => {
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return Err(bad_resource_id());
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}
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};
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if handle == handleapi::INVALID_HANDLE_VALUE {
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return Err(last_os_error());
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} else if handle.is_null() {
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return Err(custom_error("ReferenceError", "null handle"));
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}
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let mut original_mode: DWORD = 0;
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if unsafe { consoleapi::GetConsoleMode(handle, &mut original_mode) }
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== FALSE
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{
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return Err(last_os_error());
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}
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let new_mode = if is_raw {
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original_mode & !RAW_MODE_MASK
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} else {
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original_mode | RAW_MODE_MASK
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};
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if unsafe { consoleapi::SetConsoleMode(handle, new_mode) } == FALSE {
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return Err(last_os_error());
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}
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Ok(json!({}))
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}
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#[cfg(unix)]
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{
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use std::os::unix::io::AsRawFd;
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let resource_holder =
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state.resource_table.get_mut::<StreamResourceHolder>(rid);
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if resource_holder.is_none() {
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return Err(bad_resource_id());
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}
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if is_raw {
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let (raw_fd, maybe_tty_mode) =
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match &mut resource_holder.unwrap().resource {
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StreamResource::FsFile(Some((f, ref mut metadata))) => {
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(f.as_raw_fd(), &mut metadata.tty.mode)
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}
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StreamResource::FsFile(None) => return Err(resource_unavailable()),
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_ => {
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return Err(not_supported());
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}
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};
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if maybe_tty_mode.is_some() {
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// Already raw. Skip.
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return Ok(json!({}));
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}
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let original_mode = termios::tcgetattr(raw_fd)?;
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let mut raw = original_mode.clone();
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// Save original mode.
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maybe_tty_mode.replace(original_mode);
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raw.input_flags &= !(termios::InputFlags::BRKINT
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| termios::InputFlags::ICRNL
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| termios::InputFlags::INPCK
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| termios::InputFlags::ISTRIP
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| termios::InputFlags::IXON);
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raw.control_flags |= termios::ControlFlags::CS8;
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raw.local_flags &= !(termios::LocalFlags::ECHO
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| termios::LocalFlags::ICANON
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| termios::LocalFlags::IEXTEN
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| termios::LocalFlags::ISIG);
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raw.control_chars[termios::SpecialCharacterIndices::VMIN as usize] = 1;
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raw.control_chars[termios::SpecialCharacterIndices::VTIME as usize] = 0;
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termios::tcsetattr(raw_fd, termios::SetArg::TCSADRAIN, &raw)?;
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Ok(json!({}))
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} else {
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// Try restore saved mode.
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let (raw_fd, maybe_tty_mode) =
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match &mut resource_holder.unwrap().resource {
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StreamResource::FsFile(Some((f, ref mut metadata))) => {
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(f.as_raw_fd(), &mut metadata.tty.mode)
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}
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StreamResource::FsFile(None) => {
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return Err(resource_unavailable());
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}
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_ => {
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return Err(bad_resource_id());
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}
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};
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if let Some(mode) = maybe_tty_mode.take() {
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termios::tcsetattr(raw_fd, termios::SetArg::TCSADRAIN, &mode)?;
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}
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Ok(json!({}))
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}
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}
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}
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#[derive(Deserialize)]
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struct IsattyArgs {
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rid: u32,
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}
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fn op_isatty(
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state: &mut OpState,
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args: Value,
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_zero_copy: &mut [ZeroCopyBuf],
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) -> Result<Value, AnyError> {
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let args: IsattyArgs = serde_json::from_value(args)?;
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let rid = args.rid;
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let isatty: bool = std_file_resource(state, rid as u32, move |r| match r {
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Ok(std_file) => {
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#[cfg(windows)]
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{
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use winapi::um::consoleapi;
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let handle = get_windows_handle(&std_file)?;
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let mut test_mode: DWORD = 0;
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// If I cannot get mode out of console, it is not a console.
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Ok(unsafe { consoleapi::GetConsoleMode(handle, &mut test_mode) != 0 })
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}
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#[cfg(unix)]
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{
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use std::os::unix::io::AsRawFd;
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let raw_fd = std_file.as_raw_fd();
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Ok(unsafe { libc::isatty(raw_fd as libc::c_int) == 1 })
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}
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}
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Err(StreamResource::FsFile(_)) => unreachable!(),
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_ => Ok(false),
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})?;
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Ok(json!(isatty))
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}
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#[derive(Deserialize)]
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struct ConsoleSizeArgs {
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rid: u32,
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}
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#[derive(Serialize)]
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struct ConsoleSize {
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columns: u32,
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rows: u32,
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}
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fn op_console_size(
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state: &mut OpState,
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args: Value,
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_zero_copy: &mut [ZeroCopyBuf],
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) -> Result<Value, AnyError> {
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super::check_unstable(state, "Deno.consoleSize");
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let args: ConsoleSizeArgs = serde_json::from_value(args)?;
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let rid = args.rid;
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let size = std_file_resource(state, rid as u32, move |r| match r {
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Ok(std_file) => {
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#[cfg(windows)]
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{
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use std::os::windows::io::AsRawHandle;
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let handle = std_file.as_raw_handle();
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unsafe {
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let mut bufinfo: winapi::um::wincon::CONSOLE_SCREEN_BUFFER_INFO =
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std::mem::zeroed();
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if winapi::um::wincon::GetConsoleScreenBufferInfo(
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handle,
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&mut bufinfo,
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) == 0
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{
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return Err(last_os_error());
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}
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Ok(ConsoleSize {
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columns: bufinfo.dwSize.X as u32,
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rows: bufinfo.dwSize.Y as u32,
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})
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}
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}
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#[cfg(unix)]
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{
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use std::os::unix::io::AsRawFd;
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let fd = std_file.as_raw_fd();
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unsafe {
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let mut size: libc::winsize = std::mem::zeroed();
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if libc::ioctl(fd, libc::TIOCGWINSZ, &mut size as *mut _) != 0 {
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return Err(last_os_error());
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}
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// TODO (caspervonb) return a tuple instead
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Ok(ConsoleSize {
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columns: size.ws_col as u32,
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rows: size.ws_row as u32,
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})
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}
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}
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}
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Err(_) => Err(bad_resource_id()),
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})?;
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Ok(json!(size))
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}
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