netstack: Merge the redox_netstack lib into smolnetd

logd/src/main.rs

@@ -1,6 +1,7 @@
 use redox_scheme::{RequestKind, SignalBehavior, Socket};
 use std::env;
 use std::fs::OpenOptions;
+use std::io::{Read, Write};
 use std::process;
 
 use crate::scheme::LogScheme;
@@ -19,6 +20,11 @@ fn daemon(daemon: redox_daemon::Daemon) -> ! {
 
     let socket = Socket::create("log").expect("logd: failed to create log scheme");
 
+    std::process::Command::new(std::env::current_exe().unwrap())
+        .arg("--internal-copy-kernel-log")
+        .spawn()
+        .unwrap();
+
     eprintln!("logd: ready for logging on log:");
 
     daemon.ready().expect("logd: failed to notify parent");
@@ -47,5 +53,19 @@ fn daemon(daemon: redox_daemon::Daemon) -> ! {
 }
 
 fn main() {
+    if std::env::args().nth(1).as_deref() == Some("--internal-copy-kernel-log") {
+        let mut debug_file = std::fs::File::open("/scheme/sys/log").unwrap();
+        let mut log_file = std::fs::OpenOptions::new()
+            .write(true)
+            .open("/scheme/log/kernel")
+            .unwrap();
+        let mut buf = [0; 4096];
+        loop {
+            let n = debug_file.read(&mut buf).unwrap();
+            assert!(n != 0); // FIXME currently fails as /scheme/log/kernel presents a snapshot of the log queue
+            log_file.write_all(&buf[..n]).unwrap();
+        }
+    }
+
     redox_daemon::Daemon::new(daemon).expect("logd: failed to daemonize");
 }