kubernetes wincat 源码

  • 2022-09-18
  • 浏览 (694)

kubernetes wincat 代码

文件路径:/build/pause/windows/wincat/wincat.go

/*
Copyright 2020 The Kubernetes Authors.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/

// package main connects to the given host and port and redirects its stdin to the connection and
// the connection's output to stdout. This is currently being used for port-forwarding for Windows Pods.
package main

import (
	"fmt"
	"io"
	"log"
	"net"
	"os"
	"sync"
)

func main() {
	if len(os.Args) != 3 {
		log.Fatalln("usage: wincat <host> <port>")
	}
	host := os.Args[1]
	port := os.Args[2]

	addr, err := net.ResolveTCPAddr("tcp", fmt.Sprintf("%s:%s", host, port))
	if err != nil {
		log.Fatalf("Failed to resolve TCP addr %v %v", host, port)
	}

	conn, err := net.DialTCP("tcp", nil, addr)
	if err != nil {
		log.Fatalf("Failed to connect to %s:%s because %s", host, port, err)
	}
	defer conn.Close()

	var wg sync.WaitGroup
	wg.Add(2)

	go func() {
		defer func() {
			os.Stdout.Close()
			os.Stdin.Close()
			conn.CloseRead()
			wg.Done()
		}()

		_, err := io.Copy(os.Stdout, conn)
		if err != nil {
			log.Printf("error while copying stream to stdout: %v", err)
		}
	}()

	go func() {
		defer func() {
			conn.CloseWrite()
			wg.Done()
		}()

		_, err := io.Copy(conn, os.Stdin)
		if err != nil {
			log.Printf("error while copying stream from stdin: %v", err)
		}
	}()

	wg.Wait()
}

相关信息

kubernetes 源码目录

相关文章

kubernetes tools 源码

kubernetes apiserver_etcd_test 源码

kubernetes apiserver_kms_test 源码

kubernetes append_or_replace_prefixed_line_test 源码

kubernetes audit_policy_test 源码

kubernetes configure_helper_test 源码

kubernetes mounter 源码

kubernetes cp 源码

kubernetes copy_file 源码

kubernetes data_dir 源码

0  赞