我正在Go中编写一个SSH客户端,它连接到交换机并运行配置命令列表。到目前为止,我能够成功连接到交换机,运行所需的命令,并打印会话的输出。当命令的输出太长时,开关期望输入\n
,空格或“q”时出现问题。例如:
switch#show int status
Port Name Status Vlan Duplex Speed Type
Gi1/0/1 notconnect 100 auto auto 10/100/1000BaseTX
Gi1/0/2 connected 915 a-full a-100 10/100/1000BaseTX
Gi1/0/3 notconnect 100 auto auto 10/100/1000BaseTX
Gi1/0/4 notconnect 100 auto auto 10/100/1000BaseTX
Gi1/0/5 notconnect 230 auto auto 10/100/1000BaseTX
...
Po1 sw-sww-100-sww-0-0 connected trunk a-full 10G
--More-- # Program hangs here; expecting a new line, space, or 'q'
--More--
提示实际上并未打印到屏幕上,因此只需检查Stdout
的当前行是否包含--More--
并发送\n
,空格或“ q“不起作用。
除了解决这个问题之外,我还想过滤会话的Stdout
,这样打印的唯一内容就是每个命令的输出。换句话说,我不希望将开关的提示打印到终端。
总结一下:
感谢任何帮助。这是我的代码:
package main
import (
"bufio"
"fmt"
"golang.org/x/crypto/ssh"
"io"
"log"
"os"
"time"
)
type Device struct {
Config *ssh.ClientConfig
Client *ssh.Client
Session *ssh.Session
Stdin io.WriteCloser
Stdout io.Reader
Stderr io.Reader
}
func (d *Device) Connect() error {
client, err := ssh.Dial("tcp", os.Args[1]+":22", d.Config)
if err != nil {
return err
}
session, err := client.NewSession()
if err != nil {
return err
}
sshIn, err := session.StdinPipe()
if err != nil {
return err
}
sshOut, err := session.StdoutPipe()
if err != nil {
return err
}
sshErr, err := session.StderrPipe()
if err != nil {
return err
}
d.Client = client
d.Session = session
d.Stdin = sshIn
d.Stdout = sshOut
d.Stderr = sshErr
return nil
}
func (d *Device) SendCommand(cmd string) error {
if _, err := io.WriteString(d.Stdin, cmd+"\r\n"); err != nil {
return err
}
return nil
}
func (d *Device) SendConfigSet(cmds []string) error {
for _, cmd := range cmds {
if _, err := io.WriteString(d.Stdin, cmd+"\r\n"); err != nil {
return err
}
time.Sleep(time.Second)
}
return nil
}
func (d *Device) PrintOutput() {
r := bufio.NewReader(d.Stdout)
for {
text, err := r.ReadString('\n')
fmt.Printf("%s", text)
if err == io.EOF {
break
}
}
}
func (d *Device) PrintErr() {
r := bufio.NewReader(d.Stderr)
for {
text, err := r.ReadString('\n')
fmt.Printf("%s", text)
if err == io.EOF {
break
}
}
}
func main() {
sshConf := ssh.Config{}
sshConf.Ciphers = append(sshConf.Ciphers, "aes128-cbc", "3des-cbc", "blowfish-cbc", "arcfour")
config := &ssh.ClientConfig{
Config: sshConf,
User: "mwalto7",
Auth: []ssh.AuthMethod{
ssh.Password("Lion$Tiger$Bear$"),
},
HostKeyCallback: ssh.InsecureIgnoreHostKey(),
Timeout: time.Second * 5,
}
sw := &Device{Config: config}
fmt.Println("Connecting to ", os.Args[1])
if err := sw.Connect(); err != nil {
log.Fatal(err)
}
defer sw.Client.Close()
defer sw.Session.Close()
defer sw.Stdin.Close()
if err := sw.Session.Shell(); err != nil {
log.Fatal(err)
}
commands := []string{"show int status", "exit"}
if err := sw.SendConfigSet(commands); err != nil {
log.Fatal(err)
}
sw.Session.Wait()
sw.PrintOutput()
sw.PrintErr()
}
答案 0 :(得分:0)
我通过在连接到交换机之后发送命令terminal length 0
来修复此问题,然后再发送其余命令。通过将开关的终端高度设置为0来禁用—More—
提示,允许显示命令的整个输出。