package main  
      
    import (  
        "bytes"  
        "fmt"  
        "os"  
        "os/exec"  
        "path/filepath"  
        "sync"  
    )  
      
    type jieguo struct {  
        go_num int  
        Lock   sync.Mutex  
    }  
      
    var searchName string = os.Args[1]  
    var search_result chan string = make(chan string, 1)  
    var nums chan int = make(chan int, 1)  
    var x jieguo = jieguo{go_num: 0}  
      
    func main() {  
        list := []string{"D:","E:","F"}  
        for _, i := range list {  
            fmt.Println(i, searchName)  
            go pan(i)  
        }  
        for {  
            select {  
            case x := <-search_result:  
                fmt.Println(x)  
            case y := <-nums:  
                if y == 0 {  
                    os.Exit(0)  
                }  
            }  
        }  
    }  
      
    func pan(path string) {  
        a := exec.Command("ls", path)  
        result, e := a.Output()  
        if e != nil {  
            fmt.Println(e)  
        }  
        z := bytes.Split(result, []byte{10})  
        for _, i := range z[:len(z)-1] {  
            s := path + "\\" + string(i)  
            fmt.Println(s)  
            e = os.Chdir(s)  
            if e == nil {  
                x.Lock.Lock()  
                x.go_num = x.go_num + 1  
                x.Lock.Unlock()  
                go func() {  
                    filepath.Walk(s, walk)  
                    x.Lock.Lock()  
                    x.go_num = x.go_num - 1  
                    nums <- x.go_num  
                    x.Lock.Unlock()  
                }()  
            } else {  
                fmt.Println(e)  
                if string(i) == searchName {  
                    fmt.Println(s)  
                }  
            }  
        }  
    }  
      
    func walk(path string, info os.FileInfo, err error) error {  
        if err != nil {  
            return err  
        }  
        if !info.IsDir() && info.Name() == searchName {  
            search_result <- path  
            return nil  
        }  
        return nil  
    }