openethereum/parity/main.rs

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// Copyright 2015-2020 Parity Technologies (UK) Ltd.
// This file is part of OpenEthereum.
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// OpenEthereum is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
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// OpenEthereum is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
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// along with OpenEthereum. If not, see <http://www.gnu.org/licenses/>.
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//! Ethcore client application.
#![warn(missing_docs)]
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extern crate ctrlc;
extern crate dir;
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extern crate fdlimit;
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#[macro_use]
extern crate log;
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extern crate ansi_term;
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extern crate openethereum;
extern crate panic_hook;
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extern crate parity_daemonize;
extern crate parking_lot;
extern crate ethcore_logger;
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#[cfg(windows)]
extern crate winapi;
use std::{
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io::Write,
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process,
sync::{
atomic::{AtomicBool, Ordering},
Arc,
},
};
use ansi_term::Colour;
use ctrlc::CtrlC;
use ethcore_logger::setup_log;
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use fdlimit::raise_fd_limit;
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use openethereum::{start, ExecutionAction};
use parity_daemonize::AsHandle;
use parking_lot::{Condvar, Mutex};
#[derive(Debug)]
/// Status used to exit or restart the program.
struct ExitStatus {
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/// Whether the program panicked.
panicking: bool,
/// Whether the program should exit.
should_exit: bool,
}
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fn main() -> Result<(), i32> {
let conf = {
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let args = std::env::args().collect::<Vec<_>>();
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openethereum::Configuration::parse_cli(&args).unwrap_or_else(|e| e.exit())
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};
let logger = setup_log(&conf.logger_config()).unwrap_or_else(|e| {
eprintln!("{}", e);
process::exit(2)
});
// FIXME: `pid_file` shouldn't need to cloned here
// see: `https://github.com/paritytech/parity-daemonize/pull/13` for more info
let handle = if let Some(pid) = conf.args.arg_daemon_pid_file.clone() {
info!(
"{}",
Colour::Blue.paint("starting in daemon mode").to_string()
);
let _ = std::io::stdout().flush();
match parity_daemonize::daemonize(pid) {
Ok(h) => Some(h),
Err(e) => {
error!("{}", Colour::Red.paint(format!("{}", e)));
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return Err(1);
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}
}
} else {
None
};
// increase max number of open files
raise_fd_limit();
let exit = Arc::new((
Mutex::new(ExitStatus {
panicking: false,
should_exit: false,
}),
Condvar::new(),
));
// Double panic can happen. So when we lock `ExitStatus` after the main thread is notified, it cannot be locked
// again.
let exiting = Arc::new(AtomicBool::new(false));
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trace!(target: "mode", "Not hypervised: not setting exit handlers.");
let exec = start(conf, logger);
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match exec {
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Ok(result) => match result {
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ExecutionAction::Instant(output) => {
if let Some(s) = output {
println!("{}", s);
}
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}
ExecutionAction::Running(client) => {
panic_hook::set_with({
let e = exit.clone();
let exiting = exiting.clone();
move |panic_msg| {
warn!("Panic occured, see stderr for details");
eprintln!("{}", panic_msg);
if !exiting.swap(true, Ordering::SeqCst) {
*e.0.lock() = ExitStatus {
panicking: true,
should_exit: true,
};
e.1.notify_all();
}
}
});
CtrlC::set_handler({
let e = exit.clone();
let exiting = exiting.clone();
move || {
if !exiting.swap(true, Ordering::SeqCst) {
*e.0.lock() = ExitStatus {
panicking: false,
should_exit: true,
};
e.1.notify_all();
}
}
});
// so the client has started successfully
// if this is a daemon, detach from the parent process
if let Some(mut handle) = handle {
handle.detach()
}
// Wait for signal
let mut lock = exit.0.lock();
if !lock.should_exit {
let _ = exit.1.wait(&mut lock);
}
client.shutdown();
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if lock.panicking {
return Err(1);
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}
}
},
Err(err) => {
// error occured during start up
// if this is a daemon, detach from the parent process
if let Some(mut handle) = handle {
handle.detach_with_msg(format!("{}", Colour::Red.paint(&err)))
}
eprintln!("{}", err);
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return Err(1);
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}
};
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Ok(())
}