Golang写入输入并从终端进程获取输出

Question

I have a question regarding how to send input and receive output from a terminal subprocess such as ssh. An example in python would be something like this:

how to give subprocess a password and get stdout at the same time

I cannot find a simple example in Golang that is similar how the above work.

In Golang I would want to do something like this but it does not seem to work:

    cmd := exec.Command("ssh", "user@x.x.x.x")
    cmd.Stdout = os.Stdout
    cmd.Stderr = os.Stderr
    stdin, _ := cmd.StdinPipe()
    stdin.Write([]byte("password
"))
    cmd.Run()

However; I'm not sure how to do this in go because every time i exec this ssh command I am only able to get the output. I am unable to input my password automatically from code. Does anyone have examples of writing to terminal processes such as ssh? If so, please share.

Answer 1

Thanks to the comments above, I was able to get ssh access working with a password. I used golang's ssh api library. It was fairly simple as I followed the examples from:

https://code.google.com/p/go/source/browse/ssh/example_test.go?repo=crypto

Specifically:

func ExampleDial() {
    // An SSH client is represented with a ClientConn. Currently only
    // the "password" authentication method is supported.
    //
    // To authenticate with the remote server you must pass at least one
    // implementation of AuthMethod via the Auth field in ClientConfig.
    config := &ClientConfig{
            User: "username",
            Auth: []AuthMethod{
                    Password("yourpassword"),
            },
    }
    client, err := Dial("tcp", "yourserver.com:22", config)
    if err != nil {
            panic("Failed to dial: " + err.Error())
    }

    // Each ClientConn can support multiple interactive sessions,
    // represented by a Session.
    session, err := client.NewSession()
    if err != nil {
            panic("Failed to create session: " + err.Error())
    }
    defer session.Close()

    // Once a Session is created, you can execute a single command on
    // the remote side using the Run method.
    var b bytes.Buffer
    session.Stdout = &b
    if err := session.Run("/usr/bin/whoami"); err != nil {
            panic("Failed to run: " + err.Error())
    }
    fmt.Println(b.String())
}