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Rust
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263#![cfg(target_os = "linux")]
mod activation;mod cache;mod command;mod dns_proxy;mod exec;mod host_proxy;mod logging;mod nix_config;mod protocol;mod session;
use std::env;use std::time::Duration;use tracing::warn;
#[macro_export]macro_rules! cfg { (@val $key:expr) => { std::env::var(concat!("SHUTTLE_", $key)) }; ($key:expr, $default:expr) => { cfg!(@val $key) .ok() .and_then(|s| s.parse().ok()) .unwrap_or($default.to_owned()) .into() };}
fn cmdline_param(key: &str) -> Option<String> { let cmdline = std::fs::read_to_string("/proc/cmdline").ok()?; cmdline .split_whitespace() .find_map(|tok| Some(tok.strip_prefix(key)?.strip_prefix('=')?.to_owned()))}
#[tokio::main]async fn main() { logging::init();
let args: Vec<String> = env::args().collect(); if args.get(1).map(String::as_str) == Some("enqueue-built-paths") { cache::enqueue_built_paths(&args[2..]).await; return; }
let port: u32 = cfg!(@val "VSOCK_PORT") .ok() .or_else(|| cmdline_param("shuttle.vsock_port")) .and_then(|s| s.parse().ok()) .unwrap_or(protocol::DEFAULT_PORT); let host_cid: u32 = cfg!("HOST_CID", tokio_vsock::VMADDR_CID_HOST);
loop { if let Err(error) = session::run(host_cid, port).await { warn!(host_cid, port, %error, "agent session failed"); } tokio::time::sleep(Duration::from_secs(1)).await; }}