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"thread_local", + "tracing-core", + "tracing-log", ] [[package]] @@ -614,12 +1008,6 @@ version = "1.0.6" source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "84a22b9f218b40614adcb3f4ff08b703773ad44fa9423e4e0d346d5db86e4ebc" -[[package]] -name = "unicode-segmentation" -version = "1.10.0" -source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "0fdbf052a0783de01e944a6ce7a8cb939e295b1e7be835a1112c3b9a7f047a5a" - [[package]] name = "unicode-width" version = "0.1.10" @@ -627,10 +1015,10 @@ source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "c0edd1e5b14653f783770bce4a4dabb4a5108a5370a5f5d8cfe8710c361f6c8b" [[package]] -name = "vec_map" -version = "0.8.2" +name = "valuable" +version = "0.1.0" source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "f1bddf1187be692e79c5ffeab891132dfb0f236ed36a43c7ed39f1165ee20191" +checksum = "830b7e5d4d90034032940e4ace0d9a9a057e7a45cd94e6c007832e39edb82f6d" [[package]] 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-[3.23484062,"o","\u001b]2;what up\u0007\u001b]1;what\u0007"] -[3.235505654,"o","zsh: command not found: what\r\n"] -[3.235709995,"o","\u001b[1m\u001b[7m%\u001b[27m\u001b[1m\u001b[0m \r \r"] -[3.235766455,"o","\u001b]2;michael@manjaro: ~/Projects/asciinema\u0007"] -[3.235797955,"o","\u001b]1;..cts/asciinema\u0007"] -[3.242549144,"o","\r\u001b[0m\u001b[27m\u001b[24m\u001b[J\r\n\u001b[1m\u001b[34m#\u001b[00m \u001b[36mmichael \u001b[37m@ \u001b[32mmanjaro \u001b[37min \u001b[1m\u001b[33m~/Projects/asciinema\u001b[00m \u001b[37mon\u001b[00m git:\u001b[36mmaster \u001b[31mx\u001b[00m \u001b[37m[3:21:39] C:\u001b[31m127\u001b[00m\r\n\u001b[1m\u001b[31m$ \u001b[00m\u001b[K"] -[3.242670815,"o","\u001b[?1h\u001b="] -[3.243217488,"o","\u001b[?2004h"] -[3.800181468,"i","\u0004"] -[3.800319309,"o","\u001b[?2004l\r\r\n"] diff --git a/src/asciicast.rs b/src/asciicast.rs index e700830..c2d0e1d 100644 --- a/src/asciicast.rs +++ b/src/asciicast.rs @@ -1,3 +1,7 @@ +//! Data structures for representing the [asciicast v2] format +//! +//! [asciicast v2]: https://github.com/asciinema/asciinema/blob/develop/doc/asciicast-v2.md + use std::collections::HashMap; use serde::ser::{Serialize, SerializeSeq, Serializer}; @@ -24,14 +28,14 @@ pub struct Theme { palette: String, } -pub struct Event<'a>(pub f64, pub EventKind<'a>); +pub struct Event(pub f64, pub EventKind); -pub enum EventKind<'a> { - Output(&'a [u8]), - Input(&'a [u8]), +pub enum EventKind { + Output(Vec), + Input(Vec), } -impl<'a> Serialize for Event<'a> { +impl Serialize for Event { fn serialize( &self, s: S, diff --git a/src/errors.rs b/src/errors.rs deleted file mode 100644 index 61e5b8b..0000000 --- a/src/errors.rs +++ /dev/null @@ -1,16 +0,0 @@ -pub type Result = std::result::Result; - -#[derive(Debug, Error)] -pub enum Error { - #[error("generic nix error: {0}")] - Nix(#[from] nix::Error), - - #[error("write(3) error (fd={1}, data={2:?}): {0}")] - NixWrite(nix::Error, i32, Vec), - - #[error("generic io error: {0}")] - Io(#[from] std::io::Error), - - #[error("generic serde_json error: {0}")] - SerdeJson(#[from] serde_json::Error), -} diff --git a/src/lib.rs b/src/lib.rs new file mode 100644 index 0000000..bc9ccdb --- /dev/null +++ b/src/lib.rs @@ -0,0 +1,10 @@ +#[macro_use] +extern crate serde_derive; +#[macro_use] +extern crate tracing; + +pub mod asciicast; +pub mod recorder; +// pub mod recorder; +// pub mod term; +// pub mod writer; diff --git a/src/main.rs b/src/main.rs index a979b2c..34cefa3 100644 --- a/src/main.rs +++ b/src/main.rs @@ -1,40 +1,67 @@ #[macro_use] -extern crate serde_derive; -#[macro_use] -extern crate thiserror; - -mod asciicast; -mod errors; -mod pty; -mod recorder; -mod term; -mod writer; +extern crate tracing; use std::fs::File; use anyhow::Result; -use structopt::StructOpt; +use clap::{ArgAction, Parser}; +use liveterm::recorder::Terminal; +use tokio::process::Command; +use tracing::Level; -use crate::writer::FileWriter; +#[derive(Parser)] +struct Opt { + #[clap(subcommand)] + subcommand: Subcommand, -#[derive(StructOpt)] -enum Command { + #[clap(long, short = 'v', action = ArgAction::Count, global = true)] + verbose: u8, +} + +#[derive(Parser)] +enum Subcommand { /// Record terminal session. #[structopt(name = "rec")] Record, } fn record() -> Result<()> { - let file = File::create("output.cast")?; - pty::record(&["sh", "-c", "/usr/bin/zsh"], FileWriter::new(file))?; + let _file = File::create("output.cast")?; + + let mut command = Command::new("/usr/bin/env"); + command.arg("bash"); + + let (pty, rx) = Terminal::setup(command)?; + pty.wait_until_complete()?; + Ok(()) } fn main() -> Result<()> { - match Command::from_args() { - Command::Record => { + let opt = Opt::parse(); + setup_logging(&opt)?; + + match opt.subcommand { + Subcommand::Record => { record()?; } } Ok(()) } + +fn setup_logging(opts: &Opt) -> Result<()> { + let file_appender = tracing_appender::rolling::hourly("logs", "liveterm.log"); + let max_level = match opts.verbose { + 0 => Level::ERROR, + 1 => Level::WARN, + 2 => Level::INFO, + 3 => Level::DEBUG, + _ => Level::TRACE, + }; + + tracing_subscriber::fmt() + .with_max_level(max_level) + .with_writer(file_appender) + .init(); + Ok(()) +} diff --git a/src/pty.rs b/src/pty.rs deleted file mode 100644 index 612c2b8..0000000 --- a/src/pty.rs +++ /dev/null @@ -1,203 +0,0 @@ -use std::env; -use std::ffi::CString; -use std::io; -use std::os::unix::io::RawFd; -use std::time::Instant; - -use nix::{ - fcntl::{fcntl, FcntlArg, OFlag}, - ioctl_write_buf, - pty::{forkpty, Winsize}, - sys::{ - select::{select, FdSet}, - termios::{tcsetattr, SetArg, Termios}, - wait::waitpid, - }, - unistd::{execvpe, isatty, pipe, read, write, ForkResult}, -}; -use signal_hook::SigId; - -use crate::errors::{Error, Result}; -use crate::writer::Writer; - -const STDIN_FILENO: RawFd = 0; -const STDOUT_FILENO: RawFd = 1; - -pub fn record(args: &[&str], writer: impl Writer + Send) -> Result<()> { - let forkpty_result = forkpty(None, None)?; - let master_fd = forkpty_result.master; - let start_time = Instant::now(); - - let _set_pty_size = || -> Result<()> { - ioctl_write_buf!(helper_write, libc::TIOCGWINSZ, 104, Winsize); - let winsize = Winsize { - ws_row: 24, - ws_col: 80, - ws_xpixel: 0, - ws_ypixel: 0, - }; - if isatty(STDOUT_FILENO)? {} - unsafe { helper_write(master_fd, &[winsize]) }?; - Ok(()) - }; - - let write_stdout = |data: &[u8]| -> Result<()> { - write(STDOUT_FILENO, &data)?; - Ok(()) - }; - - let mut master_writer = writer.clone(); - let mut handle_master_read = move |data: &[u8]| -> Result<()> { - let elapsed = (Instant::now() - start_time).as_secs_f64(); - master_writer.write_stdout(elapsed, data)?; - write_stdout(data)?; - Ok(()) - }; - - let write_master = |data: &[u8]| -> Result<()> { - let mut offset = 0; - while offset < data.len() { - let len = write(master_fd, data) - .map_err(|err| Error::NixWrite(err, master_fd, data.to_vec()))?; - offset += len; - } - Ok(()) - }; - - let mut stdin_writer = writer.clone(); - let mut handle_stdin_read = |data: &[u8]| -> Result<()> { - write_master(data)?; - let elapsed = (Instant::now() - start_time).as_secs_f64(); - stdin_writer.write_stdin(elapsed, data)?; - Ok(()) - }; - - let mut copy = |signal_fd: RawFd| -> Result<()> { - let mut fdset = FdSet::new(); - let mut buf = [0; 1024]; - - loop { - fdset.clear(); - fdset.insert(master_fd); - fdset.insert(STDIN_FILENO); - fdset.insert(signal_fd); - - select(None, &mut fdset, None, None, None)?; - - if fdset.contains(master_fd) { - let len = read(master_fd, &mut buf)?; - if len == 0 { - fdset.remove(master_fd); - } else { - handle_master_read(&buf[..len])?; - } - } else if fdset.contains(STDIN_FILENO) { - let len = read(STDIN_FILENO, &mut buf)?; - if len == 0 { - fdset.remove(STDIN_FILENO); - } else { - handle_stdin_read(&buf[..len])?; - } - } else if fdset.contains(signal_fd) { - // TODO - } - } - }; - - let child_pid = match forkpty_result.fork_result { - ForkResult::Parent { child } => child, - ForkResult::Child => { - let cstr_args: Vec<_> = args - .into_iter() - .map(|s| CString::new(*s).unwrap()) - .collect(); - let args: Vec<_> = cstr_args.iter().map(|s| s.as_ref()).collect(); - let cstr_env: Vec<_> = env::vars() - .map(|(k, v)| CString::new(format!("{}={}", k, v)).unwrap()) - .collect(); - let env: Vec<_> = cstr_env.iter().map(|s| s.as_ref()).collect(); - execvpe(&args[0], &args, &env)?; - unreachable!(); - } - }; - - let (pipe_r, pipe_w) = pipe()?; - let mut flags = fcntl(pipe_w, FcntlArg::F_GETFL)?; - flags |= libc::O_NONBLOCK; - fcntl(pipe_w, FcntlArg::F_SETFL(OFlag::from_bits(flags).unwrap()))?; - - let old_handlers = set_signals( - [ - signal_hook::SIGWINCH, - signal_hook::SIGCHLD, - signal_hook::SIGHUP, - signal_hook::SIGTERM, - signal_hook::SIGQUIT, - ] - .iter() - .map(|sig| (*sig, move || eprintln!("HIT SIGNAL {:?}", *sig))), - )?; - - // set_pty_size()?; - - { - let _term = RawTerm::init(STDIN_FILENO)?; - copy(pipe_r)?; - } - unset_signals(old_handlers)?; - - waitpid(child_pid, None)?; - - Ok(()) -} - -fn set_signals(signals_list: I) -> Result, io::Error> -where - I: Iterator, - F: Fn() + Sync + Send + 'static, -{ - let mut old_handlers = Vec::new(); - for (sig, handler) in signals_list { - old_handlers.push(unsafe { signal_hook::register(sig, handler) }?); - } - Ok(old_handlers) -} - -fn unset_signals(handlers_list: Vec) -> Result<(), io::Error> { - for handler in handlers_list { - signal_hook::unregister(handler); - } - Ok(()) -} - -struct RawTerm(RawFd, Termios); - -impl RawTerm { - pub fn init(fd: RawFd) -> Result { - use nix::sys::termios::*; - let saved_mode = tcgetattr(fd)?; - let mut mode = saved_mode.clone(); - mode.input_flags &= !(InputFlags::BRKINT - | InputFlags::ICRNL - | InputFlags::INPCK - | InputFlags::ISTRIP - | InputFlags::IXON); - mode.output_flags &= !OutputFlags::OPOST; - mode.control_flags &= !(ControlFlags::CSIZE | ControlFlags::PARENB); - mode.control_flags |= ControlFlags::CS8; - mode.local_flags &= !(LocalFlags::ECHO - | LocalFlags::ICANON - | LocalFlags::IEXTEN - | LocalFlags::ISIG); - mode.control_chars[libc::VMIN] = 1; - mode.control_chars[libc::VTIME] = 0; - tcsetattr(fd, SetArg::TCSAFLUSH, &mode)?; - Ok(RawTerm(fd, saved_mode)) - } -} - -impl Drop for RawTerm { - fn drop(&mut self) { - tcsetattr(self.0, SetArg::TCSAFLUSH, &self.1).unwrap(); - } -} diff --git a/src/recorder.rs b/src/recorder.rs index 45018e3..85273ad 100644 --- a/src/recorder.rs +++ b/src/recorder.rs @@ -1,30 +1,298 @@ -use std::env; -use std::path::PathBuf; +//! Setting up a recorder -pub struct RecordOptions { - pub path: PathBuf, - pub append: Option, - pub command: Option, - pub capture_env: Option>, - pub title: Option, +use std::os::unix::prelude::RawFd; +use std::sync::mpsc::{self, Receiver, Sender}; + +use anyhow::Result; +use libc::{STDIN_FILENO, STDOUT_FILENO}; +use nix::pty::{openpty, OpenptyResult}; +use nix::sys::select::{select, FdSet}; +use nix::unistd::{dup, dup2, fsync, read, write}; +use tokio::process::Command; + +use crate::asciicast::Event; + +pub struct Terminal { + /// The file descriptor that the parent process' original stdout got duplicated to. + /// + /// This needs to be saved so we can restore it later. + parent_stdout_dup: RawFd, + + pty: OpenptyResult, + + event_tx: Sender, } -pub fn record(options: RecordOptions) { - let _command = options - .command - .unwrap_or_else(|| env::var("SHELL").unwrap_or_else(|_| "sh".to_string())); +impl Terminal { + pub fn setup(mut command: Command) -> Result<(Self, Receiver)> { + command.env("TERM", "xterm-256color"); - let _command_env = env::vars(); + // Set up channels + let (event_tx, event_rx) = mpsc::channel::(); - // let header_env = HashMap::new(); + // Open a pty + let pty = openpty(None, None)?; + let parent_stdout_dup = dup(STDOUT_FILENO)?; + info!(parent_stdout_dup, "Duplicated parent process' stdout."); + dup2(pty.slave, STDOUT_FILENO)?; + info!( + redirected_to = pty.slave, + "Redirected parent process' stdout to new pty." + ); - // let (width, height) = term::get_size(); + eprintln!("Starting child process..."); - // let header = Header { - // version: 2, - // width, - // height, + // Spawn the child + let child = command.spawn()?; + let _child_pid = child.id(); - // title: options.title, - // }; + let term = Terminal { + parent_stdout_dup, + pty, + event_tx, + }; + Ok((term, event_rx)) + } + + pub fn wait_until_complete(self) -> Result<()> { + self.run()?; + + // Restore stdout + fsync(STDOUT_FILENO)?; + dup2(self.parent_stdout_dup, STDOUT_FILENO)?; + + Ok(()) + } + + fn run(&self) -> Result<()> { + let mut read_fd_set = FdSet::new(); + let mut buf = [0; 1024]; + + info!("Starting read loop..."); + loop { + // Set up fdsets + // asciinema does not capture stdin by default + read_fd_set.clear(); + read_fd_set.insert(self.pty.master); + read_fd_set.insert(STDIN_FILENO); + // TODO: Signal file descriptor + + select(None, &mut read_fd_set, None, None, None)?; + + // Master is ready for read, which means child process stdout has data + // (child process stdout) -> (pty.slave) -> (pty.master) + if read_fd_set.contains(self.pty.master) { + let bytes_read = read(self.pty.master, &mut buf)?; + if bytes_read == 0 { + info!("Read 0 bytes, exiting the read loop."); + break; + } + + let data = &buf[..bytes_read]; + debug!(bytes_read, "Read data from master."); + + // We should take this and rewrite this to the current stdout + write(STDOUT_FILENO, data)?; + } + // Stdin is ready for read, which means input from the user + else if read_fd_set.contains(STDIN_FILENO) { + let bytes_read = read(self.pty.master, &mut buf)?; + let data = &buf[..bytes_read]; + debug!(bytes_read, "Read data from master."); + + write(self.pty.master, data)?; + } + } + + Ok(()) + } } + +/* +pub fn record(args: &[&str], writer: impl Writer + Send) -> Result<()> { + // Setup + + let forkpty_result = forkpty(None, None)?; + let master_fd = forkpty_result.master; + let start_time = Instant::now(); + + let _set_pty_size = || -> Result<()> { + ioctl_write_buf!(helper_write, libc::TIOCGWINSZ, 104, Winsize); + let winsize = Winsize { + ws_row: 24, + ws_col: 80, + ws_xpixel: 0, + ws_ypixel: 0, + }; + if isatty(STDOUT_FILENO)? {} + unsafe { helper_write(master_fd, &[winsize]) }?; + Ok(()) + }; + + let write_stdout = |data: &[u8]| -> Result<()> { + write(STDOUT_FILENO, &data)?; + Ok(()) + }; + + let mut master_writer = writer.clone(); + let mut handle_master_read = move |data: &[u8]| -> Result<()> { + let elapsed = (Instant::now() - start_time).as_secs_f64(); + master_writer.write_stdout(elapsed, data)?; + write_stdout(data)?; + Ok(()) + }; + + let write_master = |data: &[u8]| -> Result<()> { + let mut offset = 0; + while offset < data.len() { + let len = write(master_fd, data) + .map_err(|err| Error::NixWrite(err, master_fd, data.to_vec()))?; + offset += len; + } + Ok(()) + }; + + let mut stdin_writer = writer.clone(); + let mut handle_stdin_read = |data: &[u8]| -> Result<()> { + write_master(data)?; + let elapsed = (Instant::now() - start_time).as_secs_f64(); + stdin_writer.write_stdin(elapsed, data)?; + Ok(()) + }; + + // Copy fds? + + let mut copy = |signal_fd: RawFd| -> Result<()> { + let mut fdset = FdSet::new(); + let mut buf = [0; 1024]; + + loop { + fdset.clear(); + fdset.insert(master_fd); + fdset.insert(STDIN_FILENO); + fdset.insert(signal_fd); + + select(None, &mut fdset, None, None, None)?; + + if fdset.contains(master_fd) { + let len = read(master_fd, &mut buf)?; + if len == 0 { + fdset.remove(master_fd); + } else { + handle_master_read(&buf[..len])?; + } + } else if fdset.contains(STDIN_FILENO) { + let len = read(STDIN_FILENO, &mut buf)?; + if len == 0 { + fdset.remove(STDIN_FILENO); + } else { + handle_stdin_read(&buf[..len])?; + } + } else if fdset.contains(signal_fd) { + // TODO + } + } + }; + + // Fork + + let child_pid = match forkpty_result.fork_result { + ForkResult::Parent { child } => child, + ForkResult::Child => { + let cstr_args: Vec<_> = args + .into_iter() + .map(|s| CString::new(*s).unwrap()) + .collect(); + let args: Vec<_> = cstr_args.iter().map(|s| s.as_ref()).collect(); + let cstr_env: Vec<_> = env::vars() + .map(|(k, v)| CString::new(format!("{}={}", k, v)).unwrap()) + .collect(); + let env: Vec<_> = cstr_env.iter().map(|s| s.as_ref()).collect(); + execvpe(&args[0], &args, &env)?; + unreachable!(); + } + }; + + let (pipe_r, pipe_w) = pipe()?; + let mut flags = fcntl(pipe_w, FcntlArg::F_GETFL)?; + flags |= libc::O_NONBLOCK; + fcntl(pipe_w, FcntlArg::F_SETFL(OFlag::from_bits(flags).unwrap()))?; + + // Intercept signal handlers + + let old_handlers = set_signals( + [ + signal_hook::SIGWINCH, + signal_hook::SIGCHLD, + signal_hook::SIGHUP, + signal_hook::SIGTERM, + signal_hook::SIGQUIT, + ] + .iter() + .map(|sig| (*sig, move || eprintln!("HIT SIGNAL {:?}", *sig))), + )?; + + // set_pty_size()?; + + { + let _term = RawTerm::init(STDIN_FILENO)?; + copy(pipe_r)?; + } + unset_signals(old_handlers)?; + + waitpid(child_pid, None)?; + + Ok(()) +} + +fn set_signals(signals_list: I) -> Result, io::Error> +where + I: Iterator, + F: Fn() + Sync + Send + 'static, +{ + let mut old_handlers = Vec::new(); + for (sig, handler) in signals_list { + old_handlers.push(unsafe { signal_hook::register(sig, handler) }?); + } + Ok(old_handlers) +} + +fn unset_signals(handlers_list: Vec) -> Result<(), io::Error> { + for handler in handlers_list { + signal_hook::unregister(handler); + } + Ok(()) +} + +struct RawTerm(RawFd, Termios); + +impl RawTerm { + pub fn init(fd: RawFd) -> Result { + use nix::sys::termios::*; + let saved_mode = tcgetattr(fd)?; + let mut mode = saved_mode.clone(); + mode.input_flags &= !(InputFlags::BRKINT + | InputFlags::ICRNL + | InputFlags::INPCK + | InputFlags::ISTRIP + | InputFlags::IXON); + mode.output_flags &= !OutputFlags::OPOST; + mode.control_flags &= !(ControlFlags::CSIZE | ControlFlags::PARENB); + mode.control_flags |= ControlFlags::CS8; + mode.local_flags &= !(LocalFlags::ECHO + | LocalFlags::ICANON + | LocalFlags::IEXTEN + | LocalFlags::ISIG); + mode.control_chars[libc::VMIN] = 1; + mode.control_chars[libc::VTIME] = 0; + tcsetattr(fd, SetArg::TCSAFLUSH, &mode)?; + Ok(RawTerm(fd, saved_mode)) + } +} + +impl Drop for RawTerm { + fn drop(&mut self) { + tcsetattr(self.0, SetArg::TCSAFLUSH, &self.1).unwrap(); + } +} +*/