syswatch 0.1.1

Single-host, read-only system diagnostics TUI. Twelve tabs covering CPU, memory, disks, processes, GPU, power, services, network, plus a Timeline scrubber and an Insights anomaly engine. Sibling to netwatch.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169

use ratatui::{
    layout::{Constraint, Direction, Layout, Rect},
    style::{Modifier, Style},
    text::{Line, Span},
    widgets::Paragraph,
    Frame,
};

use crate::app::{App, Snapshot};
use crate::ui::{
    palette as p,
    widgets::{block_bar, human_bytes, panel},
};

pub fn draw(f: &mut Frame, area: Rect, _app: &App, snap: &Snapshot) {
    let v = Layout::default()
        .direction(Direction::Vertical)
        .constraints([
            Constraint::Length(7),
            Constraint::Length(7),
            Constraint::Min(0),
        ])
        .split(area);

    draw_ram_bar(f, v[0], snap);
    draw_swap(f, v[1], snap);
    draw_top_rss(f, v[2], snap);
}

fn draw_ram_bar(f: &mut Frame, area: Rect, snap: &Snapshot) {
    let block = panel("RAM");
    let inner = block.inner(area);
    f.render_widget(block, area);

    let total = snap.mem.total_bytes.max(1);
    let used = snap.mem.used_bytes;
    let avail = snap.mem.available_bytes;
    let pct = used as f32 / total as f32;
    let color = if pct >= 0.9 {
        p::RED
    } else if pct >= 0.7 {
        p::YELLOW
    } else {
        p::GREEN
    };

    let header = Line::from(vec![
        Span::styled("used ", Style::default().fg(p::DIM)),
        Span::styled(
            human_bytes(used),
            Style::default().fg(color).add_modifier(Modifier::BOLD),
        ),
        Span::styled(" / ", Style::default().fg(p::DIM)),
        Span::styled(human_bytes(total), Style::default().fg(p::FG)),
        Span::styled(
            format!("   ({:>4.1}%)", pct * 100.0),
            Style::default().fg(p::DIM),
        ),
        Span::styled("    available ", Style::default().fg(p::DIM)),
        Span::styled(human_bytes(avail), Style::default().fg(p::FG)),
    ]);
    let bar = block_bar(pct, inner.width, color);
    f.render_widget(
        Paragraph::new(vec![header, Line::from(""), bar]).style(Style::default().bg(p::BG)),
        inner,
    );
}

fn draw_swap(f: &mut Frame, area: Rect, snap: &Snapshot) {
    let block = panel("Swap");
    let inner = block.inner(area);
    f.render_widget(block, area);

    let total = snap.mem.swap_total_bytes;
    let used = snap.mem.swap_used_bytes;
    let pct = if total > 0 {
        used as f32 / total as f32
    } else {
        0.0
    };
    let color = if pct >= 0.75 {
        p::RED
    } else if pct >= 0.25 {
        p::YELLOW
    } else {
        p::GREEN
    };

    let header = if total == 0 {
        Line::from(vec![Span::styled(
            "no swap configured",
            Style::default().fg(p::DIM),
        )])
    } else {
        Line::from(vec![
            Span::styled("used ", Style::default().fg(p::DIM)),
            Span::styled(
                human_bytes(used),
                Style::default().fg(color).add_modifier(Modifier::BOLD),
            ),
            Span::styled(" / ", Style::default().fg(p::DIM)),
            Span::styled(human_bytes(total), Style::default().fg(p::FG)),
            Span::styled(
                format!("   ({:>4.1}%)", pct * 100.0),
                Style::default().fg(p::DIM),
            ),
        ])
    };
    let bar = block_bar(pct, inner.width, color);
    f.render_widget(
        Paragraph::new(vec![header, Line::from(""), bar]).style(Style::default().bg(p::BG)),
        inner,
    );
}

fn draw_top_rss(f: &mut Frame, area: Rect, snap: &Snapshot) {
    let block = panel("Top processes (by RSS)");
    let inner = block.inner(area);
    f.render_widget(block, area);

    let mut sorted = snap.procs.clone();
    sorted.sort_by(|a, b| b.mem_rss.cmp(&a.mem_rss));
    let take = inner.height.saturating_sub(1) as usize;

    let mut lines: Vec<Line> = vec![Line::from(vec![
        Span::styled(
            format!("{:>7} ", "PID"),
            Style::default().fg(p::DIM).add_modifier(Modifier::BOLD),
        ),
        Span::styled(
            format!("{:<10} ", "USER"),
            Style::default().fg(p::DIM).add_modifier(Modifier::BOLD),
        ),
        Span::styled(
            format!("{:>10} ", "RSS"),
            Style::default().fg(p::DIM).add_modifier(Modifier::BOLD),
        ),
        Span::styled(
            format!("{:>10} ", "VIRT"),
            Style::default().fg(p::DIM).add_modifier(Modifier::BOLD),
        ),
        Span::styled(
            "COMMAND",
            Style::default().fg(p::DIM).add_modifier(Modifier::BOLD),
        ),
    ])];
    for proc_ in sorted.iter().take(take) {
        lines.push(Line::from(vec![
            Span::styled(format!("{:>7} ", proc_.pid), Style::default().fg(p::FG)),
            Span::styled(
                format!("{:<10.10} ", proc_.user),
                Style::default().fg(p::DIM),
            ),
            Span::styled(
                format!("{:>10} ", human_bytes(proc_.mem_rss)),
                Style::default().fg(p::CYAN),
            ),
            Span::styled(
                format!("{:>10} ", human_bytes(proc_.mem_virt)),
                Style::default().fg(p::DIM),
            ),
            Span::styled(proc_.name.clone(), Style::default().fg(p::FG)),
        ]));
    }
    f.render_widget(
        Paragraph::new(lines).style(Style::default().bg(p::BG)),
        inner,
    );
}