138 lines
3.0 KiB
Go
138 lines
3.0 KiB
Go
package main
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import (
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"fmt"
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"log"
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"os"
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"os/signal"
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"path/filepath"
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"syscall"
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"time"
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"github.com/fsnotify/fsnotify"
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)
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const (
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utmpDir = "/dev/pts/"
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// ANSI转义序列定义颜色
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colorReset = "\033[0m"
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colorRed = "\033[31m"
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colorGreen = "\033[32m"
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colorYellow = "\033[33m"
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colorBlue = "\033[34m"
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colorPurple = "\033[35m"
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colorCyan = "\033[36m"
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colorWhite = "\033[37m"
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// 样式
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bold = "\033[1m"
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underline = "\033[4m"
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)
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func main() {
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logFile, err := os.OpenFile("./welcome-service.log", os.O_CREATE|os.O_APPEND|os.O_WRONLY, 0644)
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if err != nil {
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log.Fatal(err)
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}
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defer logFile.Close()
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log.SetOutput(logFile)
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watcher, err := fsnotify.NewWatcher()
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if err != nil {
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log.Fatal(err)
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}
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defer watcher.Close()
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err = watcher.Add(utmpDir)
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if err != nil {
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log.Fatal(err)
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}
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sigChan := make(chan os.Signal, 1)
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signal.Notify(sigChan, syscall.SIGINT, syscall.SIGTERM)
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checkExistingTerminals()
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log.Println("Service started")
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for {
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select {
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case event, ok := <-watcher.Events:
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if !ok {
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return
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}
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if event.Op&fsnotify.Create == fsnotify.Create {
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go handleNewTerminal(event.Name)
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}
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case err, ok := <-watcher.Errors:
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if !ok {
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return
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}
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log.Printf("Watcher error: %v", err)
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case sig := <-sigChan:
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log.Printf("Received signal: %v", sig)
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return
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}
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}
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}
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func checkExistingTerminals() {
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entries, err := os.ReadDir(utmpDir)
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if err != nil {
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log.Printf("Error reading %s: %v", utmpDir, err)
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return
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}
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for _, entry := range entries {
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if !entry.IsDir() {
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go handleNewTerminal(filepath.Join(utmpDir, entry.Name()))
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}
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}
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}
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func handleNewTerminal(path string) {
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time.Sleep(time.Second)
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f, err := os.OpenFile(path, os.O_WRONLY, 0)
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if err != nil {
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log.Printf("Error opening terminal %s: %v", path, err)
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return
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}
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defer f.Close()
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// 使用颜色和样式的欢迎信息
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welcomeMsg := fmt.Sprintf(`
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%s%s╔════════════════════════════════════════════╗%s
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%s%s║ Welcome to the System! ║%s
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%s%s║---------------------------------------- ║%s
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%s%s║ Terminal: %s%s%-30s%s ║%s
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%s%s║ Time: %s%s%-35s%s ║%s
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%s%s╚════════════════════════════════════════════╝%s
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`,
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bold, colorCyan, colorReset,
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bold, colorCyan, colorReset,
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bold, colorCyan, colorReset,
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bold, colorCyan, colorGreen, underline, path, colorCyan, colorReset,
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bold, colorCyan, colorYellow, underline, time.Now().Format("2006-01-02 15:04:05"), colorCyan, colorReset,
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bold, colorCyan, colorReset,
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)
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// 写入欢迎信息
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_, err = f.WriteString(welcomeMsg)
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if err != nil {
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log.Printf("Error writing to terminal %s: %v", path, err)
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return
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}
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// 模拟按下回车键
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_, err = f.Write([]byte{'\n'})
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if err != nil {
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log.Printf("Error sending newline to terminal %s: %v", path, err)
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return
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}
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log.Printf("Welcome message sent to %s", path)
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}
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