BetterDB MCP

Instructions

Implementation Reference

• packages/mcp/src/autostart.ts:157-189 (handler)

  The implementation of the stopMonitor function, which checks for the monitor PID file, kills the process if it's running, and cleans up the PID file.

  export async function stopMonitor(): Promise<{ stopped: boolean; message: string }> {
    if (!fs.existsSync(PID_FILE)) {
      return { stopped: false, message: 'No persisted monitor found.' };
    }
    const pid = readValidPid(PID_FILE);
    if (pid === null) {
      try { fs.unlinkSync(PID_FILE); } catch { /* ignore */ }
      return { stopped: true, message: 'Removed corrupted PID file.' };
    }
    let wasRunning = false;
    try {
      process.kill(pid, 0);
      wasRunning = true;
      process.kill(pid, 'SIGTERM');
    } catch {
      // Process not running — stale PID file
    }
  
    if (wasRunning) {
      // Wait for process to actually exit (up to 5s)
      const deadline = Date.now() + 5_000;
      while (Date.now() < deadline) {
        try { process.kill(pid, 0); } catch { break; }
        await new Promise(resolve => setTimeout(resolve, 250));
      }
    }
  
    try { fs.unlinkSync(PID_FILE); } catch { /* already removed */ }
    return wasRunning
      ? { stopped: true, message: `Stopped monitor (PID ${pid}).` }
      : { stopped: true, message: `Removed stale PID file (process ${pid} was not running).` };
  }