Function append_boot_separator

vmm/src/app.rs:1082–1092

Append a boot separator line with timestamp to an append-mode log file.

(path: &std::path::Path)

/// Append a boot separator line with timestamp to an append-mode log file.
fn append_boot_separator(path: &std::path::Path) {
    use std::io::Write;
    if !path.exists() {
        return;
    }
    let Ok(mut file) = std::fs::OpenOptions::new().append(true).open(path) else {
        return;
    };
    let timestamp = humantime::format_rfc3339_seconds(std::time::SystemTime::now());
    let _ = writeln!(file, "\n===== boot @ {timestamp} =====\n");
}

/// Append current serial.log into serial.history.log with a boot separator,
/// then truncate history if it exceeds `max_bytes`.