File Operation MCP Server

import type { McpServer } from '@modelcontextprotocol/sdk/server/mcp.js'; import { z } from 'zod'; import os from 'os'; import { exec } from 'child_process'; import { promisify } from 'util'; const execPromise = promisify(exec); export default function manageBackgroundProcess(server: McpServer) { server.registerTool( 'manage-background-process', { title: 'Manage Background Process', description: 'Checks the status of or stops a process running in the background using its PID.', inputSchema: { pid: z.number().int().positive().describe('The Process ID (PID) of the process to manage.'), action: z.enum(['status', 'stop']).describe('The action to perform: "status" to check if it is running, "stop" to terminate it.'), }, }, async (params: { pid: number; action: 'status' | 'stop' }) => { const { pid, action } = params; const platform = os.platform(); try { if (action === 'status') { if (platform === 'win32') { const { stdout } = await execPromise(`tasklist /FI "PID eq ${pid}"`); if (stdout.includes(pid.toString())) { return { content: [{ type: 'text', text: `Process with PID ${pid} is running.` }] }; } else { return { content: [{ type: 'text', text: `Process with PID ${pid} is not found.` }] }; } } else { // On POSIX systems, sending signal 0 tests for process existence. process.kill(pid, 0); return { content: [{ type: 'text', text: `Process with PID ${pid} is running.` }] }; } } if (action === 'stop') { if (platform === 'win32') { await execPromise(`taskkill /PID ${pid} /F`); } else { process.kill(pid, 'SIGTERM'); } return { content: [{ type: 'text', text: `Termination signal sent to process with PID ${pid}.` }] }; } // This part should not be reached due to the enum validation return { content: [{ type: 'text', text: 'Invalid action.' }], isError: true }; } catch (error: any) { if (error.code === 'ESRCH') { return { content: [{ type: 'text', text: `Process with PID ${pid} is not found.` }] }; } return { content: [{ type: 'text', text: `An error occurred while managing PID ${pid}: ${error.message}` }], isError: true, }; } } ); }