Add hostname to output

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "ibtop"
-version = "0.1.5"
+version = "0.1.7"
 edition = "2021"
 authors = ["info@jannik-straube.de"]
 description = "Real-time terminal monitor for InfiniBand networks"
@@ -17,6 +17,7 @@ crossterm = "0.27"
 rand = "0.9.2"
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
+hostname = "0.4"
 
 [lints.clippy]
 pedantic = "deny"

src/main.rs

@@ -16,6 +16,13 @@ use std::time::{Duration, Instant};
 const UI_REFRESH_INTERVAL_MS: u64 = 33;
 const METRICS_UPDATE_INTERVAL_MS: u64 = 250;
 
+fn get_hostname() -> String {
+    hostname::get().map_or_else(
+        |_| "unknown".to_string(),
+        |h| h.to_string_lossy().into_owned(),
+    )
+}
+
 fn main() -> Result<(), io::Error> {
     let args: Vec<String> = env::args().collect();
     let json_mode = args.contains(&String::from("--json"));
@@ -41,7 +48,11 @@ fn run_json_mode() -> Result<(), io::Error> {
         }
     };
 
-    let json_output = serde_json::to_string_pretty(&adapters)?;
+    let output = types::IbtopOutput {
+        hostname: get_hostname(),
+        adapters,
+    };
+    let json_output = serde_json::to_string_pretty(&output)?;
     println!("{json_output}");
 
     Ok(())
@@ -74,6 +85,7 @@ fn run_interactive_mode() -> Result<(), io::Error> {
 fn run_app<B: ratatui::backend::Backend>(terminal: &mut Terminal<B>) -> io::Result<()> {
     let use_fake_data = std::env::var("IBTOP_FAKE_DATA").is_ok();
     let mut metrics = metrics::MetricsCollector::new();
+    let hostname = get_hostname();
 
     let ui_refresh_duration = Duration::from_millis(UI_REFRESH_INTERVAL_MS);
     let metrics_update_interval = Duration::from_millis(METRICS_UPDATE_INTERVAL_MS);
@@ -100,7 +112,7 @@ fn run_app<B: ratatui::backend::Backend>(terminal: &mut Terminal<B>) -> io::Resu
             last_metrics_update = now;
         }
 
-        terminal.draw(|f| ui::draw(f, &adapters, &metrics))?;
+        terminal.draw(|f| ui::draw(f, &adapters, &metrics, &hostname))?;
 
         let timeout = ui_refresh_duration.saturating_sub(now.elapsed());
         if event::poll(timeout)? {

src/types.rs

@@ -2,6 +2,12 @@ use serde::{Deserialize, Serialize};
 use std::fmt::Display;
 use std::str::FromStr;
 
+#[derive(Debug, Serialize, Deserialize)]
+pub(crate) struct IbtopOutput {
+    pub(crate) hostname: String,
+    pub(crate) adapters: Vec<AdapterInfo>,
+}
+
 #[derive(Debug, Clone, Copy, PartialEq, Eq, Default, Serialize, Deserialize)]
 pub(crate) enum PortState {
     Active,

src/ui.rs

@@ -8,7 +8,12 @@ use ratatui::{
 use crate::metrics::MetricsCollector;
 use crate::types::AdapterInfo;
 
-pub fn draw(frame: &mut Frame, adapters: &[AdapterInfo], metrics: &MetricsCollector) {
+pub fn draw(
+    frame: &mut Frame,
+    adapters: &[AdapterInfo],
+    metrics: &MetricsCollector,
+    hostname: &str,
+) {
     let chunks = Layout::default()
         .direction(Direction::Vertical)
         .constraints([
@@ -18,7 +23,7 @@ pub fn draw(frame: &mut Frame, adapters: &[AdapterInfo], metrics: &MetricsCollec
         ])
         .split(frame.size());
 
-    draw_adapters(frame, chunks[1], adapters, metrics);
+    draw_adapters(frame, chunks[1], adapters, metrics, hostname);
     draw_help_footer(frame, chunks[2]);
 }
 
@@ -33,6 +38,7 @@ fn draw_adapters(
     area: Rect,
     adapters: &[AdapterInfo],
     metrics: &MetricsCollector,
+    hostname: &str,
 ) {
     let mut rows: Vec<Row> = Vec::new();
 
@@ -45,7 +51,7 @@ fn draw_adapters(
             // Add adapter header row that spans the full width
             rows.push(Row::new(vec![
                 Cell::from("Adapter:"),
-                Cell::from(adapter.name.to_string()).style(
+                Cell::from(adapter.name.clone()).style(
                     Style::default()
                         .fg(Color::Green)
                         .add_modifier(Modifier::BOLD),
@@ -141,7 +147,7 @@ fn draw_adapters(
         .block(
             Block::default()
                 .borders(Borders::ALL)
-                .title("ibtop - InfiniBand Monitor"),
+                .title(format!("ibtop - InfiniBand Monitor @ {hostname}")),
         );
 
     frame.render_widget(table, area);