From 772093279e1dd162a47e2dfe50d9a9ae0192d750 Mon Sep 17 00:00:00 2001
From: namilsk <namilsk@namilsk.tech>
Date: Fri, 6 Mar 2026 22:42:10 +0300
Subject: implemented `SIGUSER/SIGINT/SIGTERM` handlers, graceful shutdown,
 logging to file

---
 init/src/main.rs | 39 ++++++++++++++++++++++++++++++++++-----
 1 file changed, 34 insertions(+), 5 deletions(-)

(limited to 'init/src/main.rs')

diff --git a/init/src/main.rs b/init/src/main.rs
index 6821bd6..a3492d1 100644
--- a/init/src/main.rs
+++ b/init/src/main.rs
@@ -10,26 +10,31 @@ mod signals;
 use crate::host::locale;
 use crate::host::set::set_hostname;
 use crate::kmods::load::load_modules;
-use crate::log::{log_critical_error, log_success, log_warning};
+use crate::log::{init_logging, log_critical_error, log_success, log_warning};
 use crate::mounts::fstab::FstabEntry;
 use crate::mounts::rescue;
 use crate::pid_one::check_pid;
 use crate::processes::udev::spawn_udev;
 use crate::services::units::{Runlevel, services_mainloop};
 use crate::signals::sigchld;
+use crate::signals::sigterm::{self, RELOAD_REQUESTED, DEBUG_DUMP_REQUESTED};
 
 // RULE: I will not use .expect() and .unwrap() in this project. This causes panic,
 // which will affect stability.
 
 use std::sync::Mutex;
 use std::thread;
+use std::time::Duration;
 
 /// Variable which show current runlevel;
 pub static RUNLEVEL_STATE: Mutex<Runlevel> = Mutex::new(Runlevel::Undefined);
 
 // TODO: Add proper RUNLEVEL_STATE switching
 fn main() -> Result<(), Box<dyn std::error::Error>> {
-    println!("Initializing your system.");
+    if let Err(e) = init_logging() {
+        eprintln!("Failed to initialize logging: {}", e);
+    }
+
     if let Err(e) = check_pid() {
         log_critical_error(&format!(
             "Runned not as first process. init/src/pid_one.rs:8:8 - {}",
@@ -38,6 +43,9 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
         return Err(e);
     }
 
+    sigchld::setup_sigchld_handler()?;
+    sigterm::setup_signal_handlers()?;
+
     match FstabEntry::parse_fstab("/etc/fstab") {
         Ok(entries) => {
             log_success("Sucessfully parsed /etc/fstab.");
@@ -77,9 +85,30 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
         Err(e) => log_warning(&format!("Failed to set localization: {}", e)),
     }
 
-    let _ = sigchld::setup_sigchld_handler();
-
     thread::spawn(services_mainloop);
 
-    Ok(())
+    log_success("System initialization complete. Entering main loop.");
+    
+    loop {
+        if sigterm::SHUTDOWN_REQUESTED.load(std::sync::atomic::Ordering::SeqCst) {
+            log_warning("Shutdown signal received.");
+            let _ = sigterm::graceful_shutdown();
+            break Ok(());
+        }
+
+        if RELOAD_REQUESTED.swap(false, std::sync::atomic::Ordering::SeqCst) {
+            log_warning("SIGUSR1 received - config reload requested (not implemented yet).");
+            // TODO: Configs reload 
+        }
+
+        // SIGUSR2 (debug dump)
+        if DEBUG_DUMP_REQUESTED.swap(false, std::sync::atomic::Ordering::SeqCst) {
+            log_warning("SIGUSR2 received - debug dump requested (not implemented yet).");
+            // TODO: debug dump 
+        }
+
+        // Sleep to not disturb CPU
+        // TODO: io_uring / epolls 
+        thread::sleep(Duration::from_secs(1));
+    }
 }
-- 
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