bash 如何在bash脚本中使用expect
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how to use expect inside a bash script
提问by munish
This is the code snippet i am using in the followingbash script:
这是我在以下bash 脚本中使用的代码片段：
for user_input in `awk '{print}' testfile_$$.txt`
do
ipaddress=`echo $user_input | cut -d';' -f 1`
command="${config_mode}`echo $user_input | cut -d';' -f 2-`"
ping -w 1 $ipaddress 1> /dev/null 2> $ERR_LOG_FILE 1> $LOG_FILE
if [ $? -eq 0 ];then
ssh "$USERNAME@$ipaddress" "$command"
>> $LOG_FILE
fi
done
how do i use expect to automate the ssh login in this script.
我如何使用 expect 在此脚本中自动执行 ssh 登录。
i am very new to expect and started testing this(it failed) :
我很期待并开始测试这个（它失败了）：
#!/usr/bin/bash
set force_conservative 0 ;# set to 1 to force conservative mode even if
;# script wasn't run conservatively originally
if {$force_conservative} {
set send_slow {1 .1}
proc send {ignore arg} {
sleep .1
exp_send -s -- $arg
}
}
#
set timeout -1
spawn ssh [email protected] {uname -a; df -h}
match_max 100000
expect "*?assword: "
send -- "bar01\r"
expect eof
do i need to write the bash script all over again in expect script or it expect can be used inside bash script if it can be done:
我是否需要在expect脚本中重新编写bash脚本，或者如果可以的话，它可以在bash脚本中使用它：
more over i need to get the bash variable $command, $username, $password, $ipaddressand use it in the expect part
此外，我需要获取 bash 变量$command、$username、$password、$ipaddress并在期望部分使用它
what solution would you suggest? or can i create an expect script and call it from the bash script just for login,error handling,execution,logfiles
你会建议什么解决方案？或者我可以创建一个期望脚本并从 bash 脚本中调用它只是为了登录、错误处理、执行、日志文件
回答by V H
well you will need to run two seperate scripts a shell script that calls an expect script
那么你将需要运行两个单独的脚本一个调用期望脚本的 shell 脚本
#!/usr/bin/bash
set force_conservative 0 ;
change above to
将上面更改为
#!/usr/bin/expect
set force_conservative 0 ;
or alternatively in your shell script I am unsure about format but you can send expect -c with command to execute:
或者，在您的 shell 脚本中，我不确定格式，但您可以使用命令发送 expect -c 以执行：
expect -c "send \"hello\n\"" -c "expect \"#\""
expect -c "send \"hello\n\"; expect \"#\""
Actually there is also one other alternative
其实还有另一种选择
#!/bin/bash
echo "shell script"
/usr/bin/expect<<EOF
set force_conservative 0 ;# set to 1 to force conservative mode even if
;# script wasn't run conservatively originally
if {$force_conservative} {
set send_slow {1 .1}
proc send {ignore arg} {
sleep .1
exp_send -s -- $arg
}
}
#
set timeout -1
spawn ssh [email protected] {uname -a; df -h}
match_max 100000
expect "*?assword: "
send -- "bar01\r"
expect eof
EOF
