问题描述
我试图通过运行多个命令,但似乎是每个会话只允许一个命令(除非我错了) 。我想知道如何绕过这个限制,重新使用会话或发送一系列命令。
原因是我需要在同一个会话中使用下一个命令(sh /usr/bin/myscript.sh)运行 sudo su
针对您的特定问题,您可以轻松运行 sudo /path/to/script.sh,这让我震惊,没有一种简单的方法在同一个会话中运行多个命令,所以我想出了一个 var wg(chan字符串,1) sync.WaitGroup
wg.Add(1)//对于shell本身
去func(){
for cmd:=范围在{
wg.Add(1)
w.Write([] byte(cmd +\\\
))
wg.Wait()
}
}()
go func(){
var(
buf [65 * 1024] byte
t
为{
n,err:= r.Read(buf [t:])
if err!= nil {
close(in)
close(out)
return
}
t + = n
if buf [t-2] =='$'{//假设$ PS1 ==' sh-4.3 $'
out< - string(buf [:t])
t = 0
wg.Done()
}
}
}()
return in,out
}
func main(){
config:=& ssh.ClientConfig {
User:kf5 ,
认证:[] ssh.AuthMethod {
ssh.Password(kf5),
},
}
client,err:= ssh.Dial (tcp,127.0.0.1:22,config)
if err!= nil {
panic(err)
}
defer client.Close ()
session,err:= client.NewSession()
if err!= nil {
log.Fatalf(无法创建s ession:%s,err)
}
推迟session.Close()
模式:= ssh.TerminalModes {
ssh.ECHO:0,//禁用回显
ssh.TTY_OP_ISPEED:14400,//输入速度= 14.4kbaud
ssh.TTY_OP_OSPEED:14400,//输出速度= 14.4kbaud
}
if err:= session.RequestPty(xterm,80,40,modes); err!= nil {
log.Fatal(err)
}
$ bw,err:= session.StdinPipe()
if err!= nil {
恐慌(错误)
}
r,错误:= session.StdoutPipe()
if err!= nil {
panic(err)
}
in,out:= MuxShell(w,r)
if err:= session.Start(/ bin / sh); err!= nil {
log.Fatal(err)
}
< -out //忽略shell输出
in< - ls -lhav
fmt.Printf(ls输出:%s \\\
,< -out)
in< - whoami
fmt.Printf(whoami:%s \\ \\ n,< -out)
in< - exit
session.Wait()
}
如果您的shell提示符不以 $
($紧跟一个空格)结尾,死锁,因此它为什么是黑客。
I'm trying to run multiple commands through ssh but seems that Session.Run allows only one command per session ( unless I'm wrong). I'm wondering how can I bypass this limitation and reuse the session or send a sequence of commands. The reason is that I need to run sudo su
within the same session with the next command ( sh /usr/bin/myscript.sh )
While for your specific problem, you can easily run sudo /path/to/script.sh
, it shock me that there wasn't a simple way to run multiple commands on the same session, so I came up with a bit of a hack, YMMV:
func MuxShell(w io.Writer, r io.Reader) (chan<- string, <-chan string) {
in := make(chan string, 1)
out := make(chan string, 1)
var wg sync.WaitGroup
wg.Add(1) //for the shell itself
go func() {
for cmd := range in {
wg.Add(1)
w.Write([]byte(cmd + "\n"))
wg.Wait()
}
}()
go func() {
var (
buf [65 * 1024]byte
t int
)
for {
n, err := r.Read(buf[t:])
if err != nil {
close(in)
close(out)
return
}
t += n
if buf[t-2] == '$' { //assuming the $PS1 == 'sh-4.3$ '
out <- string(buf[:t])
t = 0
wg.Done()
}
}
}()
return in, out
}
func main() {
config := &ssh.ClientConfig{
User: "kf5",
Auth: []ssh.AuthMethod{
ssh.Password("kf5"),
},
}
client, err := ssh.Dial("tcp", "127.0.0.1:22", config)
if err != nil {
panic(err)
}
defer client.Close()
session, err := client.NewSession()
if err != nil {
log.Fatalf("unable to create session: %s", err)
}
defer session.Close()
modes := ssh.TerminalModes{
ssh.ECHO: 0, // disable echoing
ssh.TTY_OP_ISPEED: 14400, // input speed = 14.4kbaud
ssh.TTY_OP_OSPEED: 14400, // output speed = 14.4kbaud
}
if err := session.RequestPty("xterm", 80, 40, modes); err != nil {
log.Fatal(err)
}
w, err := session.StdinPipe()
if err != nil {
panic(err)
}
r, err := session.StdoutPipe()
if err != nil {
panic(err)
}
in, out := MuxShell(w, r)
if err := session.Start("/bin/sh"); err != nil {
log.Fatal(err)
}
<-out //ignore the shell output
in <- "ls -lhav"
fmt.Printf("ls output: %s\n", <-out)
in <- "whoami"
fmt.Printf("whoami: %s\n", <-out)
in <- "exit"
session.Wait()
}
If your shell prompt doesn't end with $
($ followed by a space), this will deadlock, hence why it's a hack.
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