Instead of session.Run, use session.Shell. To interact with the shell, you
will need to connect to at least Stdin, probably using StdinPipe() (NOTE I
left out error handling):
session, err := client.NewSession()
in, err := session.StdinPipe()
out, err := session.StdoutPipe()
session.Stderr = out // this will send stderr to the same pipeerr =
session.Shell()go readOutput(out) // run a function to read the
output of the commands
// send the commands
err = fmt.Println(in, "conf t")
// probably wait for the right output before continuing
// - this requires synchronization with the readOutput goroutine
err = fmt.Println(in, "int e3/2")
// and so on
const ctrlZ = byte(25)
err = in.Write([]byte{ctrlZ})
I hope this helps!
On Thu, May 18, 2017 at 3:24 AM Dominik Link <pixelg...@gmail.com> wrote:
> Hi
>
>
> I would like to run multiple ssh commands within the same 'context' as if
> it would be using putty when connecting to a cisco device.
>
> Here are two examples of what i would need to send to the device:
>
>
>
> 1) Setting the terminal width to 0 in order to remove the line breaks.
> This makes parsing the output of the following command easier.
>
> Switch#terminal width 0Switch#show vlan brief
>
> VLAN Name Status Ports
> ---- -------------------------------- ---------
> -------------------------------
> 1 default active Et0/0, Et0/1, Et0/2, Et0/3
> ...
> ...
>
>
>
> 2) Configure an IP address of an interface. When connecting with ssh, I
> start in the 'enable' mode due to the user privileges. I need to get in the
> config mode first. Afterwards, I need to get in the interface config mode
> and can finally set the address.
>
> Router#configure terminal
> Enter configuration commands, one per line. End with
> CNTL/Z.Router(config)#interface e3/2Router(config-if)#ip address 172.16.1.1
> 255.255.255.0
>
>
>
>
> I can run a single command easily with session.Run() but as I described, I
> need to be able to run multiple commands and parse their output within a
> single 'context'.
>
> *How could this behavior be achieved with crypto/ssh?* When I try to
> create a new session after the first session.run(), it always returns with
> an error: "EOF".
>
> I just wanted to try whether the context will stay the same but it won't
> even come that far.
>
>
> //create session 1 and go into config mode
> session, err = client.NewSession()if err != nil {
> panic("Failed to create session: " + err.Error())}if err :=
> session.Run("conf t"); err != nil {
> panic("Failed to run: " + err.Error())}
> session.Close()
> //create session 2 and go into if mode
> session, err = client.NewSession()if err != nil {
> //Error will be EOF
> panic("Failed to create session: " + err.Error())}if err :=
> session.Run("int e3/2"); err != nil {
> panic("Failed to run: " + err.Error())}
> session.Close()
>
>
>
> Thanks,
> Dominik
>
>
> I also posted this question in stackoverflow
> <https://stackoverflow.com/questions/44045049/golang-multiple-commands-in-one-ssh-session>
>
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