Add relative timestamp to syslog messages

src/main.rs

@@ -9,21 +9,24 @@ use std::os::mikros::syscalls::{get_initrd, new_process};
 use std::os::mikros::{ipc, syscalls};
 use std::path::Path;
 use std::process::Command;
+use std::time::{Duration, Instant};
 use syslog_msg_ipc::Message;
 use tar_no_std::TarArchiveRef;
 
 struct SyslogMessageHandler {
     registered_devices: Vec<String>,
-    waiting_text_msgs: Vec<Message>,
+    waiting_text_msgs: Vec<(Duration, Message)>,
     msg_output_file: Option<File>,
+    start_time: Instant,
 }
 
 impl SyslogMessageHandler {
-    fn new() -> Self {
+    fn new(start_time: Instant) -> Self {
         Self {
             registered_devices: Vec::new(),
             waiting_text_msgs: Vec::new(),
             msg_output_file: None,
+            start_time,
         }
     }
 
@@ -50,17 +53,18 @@ impl SyslogMessageHandler {
                 );
             }
         } else if let Some(text) = msg.text.as_ref() {
+            let dur = Instant::now() - self.start_time;
             if let Some(file) = self.msg_output_file.as_mut() {
-                writeln!(file, "[{}] {}", msg.from, text).unwrap();
+                writeln!(file, "[{} {:?}] {}", msg.from, dur, text).unwrap();
             } else {
-                self.waiting_text_msgs.push(msg.clone());
+                self.waiting_text_msgs.push((dur, msg.clone()));
             }
         }
     }
 
     fn set_output(&mut self, mut file: File) {
-        for msg in &self.waiting_text_msgs {
-            writeln!(file, "[{}] {}", msg.from, msg.text.as_ref().unwrap()).unwrap();
+        for (dur, msg) in &self.waiting_text_msgs {
+            writeln!(file, "[{} {:?}] {}", msg.from, dur, msg.text.as_ref().unwrap()).unwrap();
         }
         self.msg_output_file = Some(file);
         self.waiting_text_msgs.clear();
@@ -68,6 +72,7 @@ impl SyslogMessageHandler {
 }
 
 fn main() {
+    let start_time = Instant::now();
     syslog_msg_ipc::register_callback();
     let initrd = TarArchiveRef::new(get_initrd()).unwrap();
     let syslog_pid = run_initrd_proc(&initrd, "bin/syslog");
@@ -76,7 +81,7 @@ fn main() {
     syslog_client.subscribe_to_binary("devfs".to_string(), vec![0, 1]);
     syslog_client.subscribe_to_binary("tarfs".to_string(), vec![0]);
     syslog_client.subscribe_to_binary("tmpfs".to_string(), vec![0]);
-    let mut msg_handler = SyslogMessageHandler::new();
+    let mut msg_handler = SyslogMessageHandler::new(start_time);
     let proc_man_pid = run_initrd_proc(&initrd, "bin/proc_man");
     let proc_man_client = proc_man_rpc::Client::new(proc_man_pid);
     proc_man_client.new_proc(0, None).unwrap();