Question

我从bash脚本调用了Expect脚本。 Expect脚本产生一个ssh会话并运行一个远程命令。我想要一个返回码我的shell脚本中可用的远程命令。

# !/bin/sh
expect -f remote.exp 192.168.1.100 user pass 10.10.10.1
# here I want to analyze exit status of remotely invoked command

期望脚本在下面，这是我丑陋的解决方法：

#!/usr/bin/expect

set timeout 20
set box [lindex $argv 0]
set user [lindex $argv 1]
set password [lindex $argv 2]
set target [lindex $argv 3]

spawn ssh -l $user $box

expect "*password:"
send "$password\r\n"

expect "*#"
send "ping -c1 $target\r\n"
expect "*#"

send "echo $?\r"
expect {
  "0\r" { puts "Test passed."; }
  timeout { puts "Test failed."; }
}

expect "*#"

PS。我读到expect_out可能会对我有所帮助，但我没有成功。任何帮助将不胜感激！感谢。

Answer 1

我尝试了以下内容，它适用于Mac：

#!/usr/bin/expect

# Process command parameters
foreach {host user password target} $argv {break}
set command "ping -c 1 $target"

# Log in
spawn ssh -l $user $host
expect -nocase "password:"
send "$password\r"

# Send the command
expect "$ "
send "$command\r"

# Echo the return code, the key here is to use the format code=X instead
# just a single digit. This way, Expect can find it
expect "$ "
send "echo code=$?\r"

# Analyze the result
set testResult "Test failed."
expect {
    "code=0" { set testResult "Test passed." }
}
puts "$testResult"

# Done, exit
expect "$ "
send exit

请注意一些差异：

我系统上的shell提示符为“$”
我只发送\ r \ n，而不是\ r \ n。我不知道是否重要
我通过发送“exit”

在Expect中获取远程命令的结果

1 个答案: