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如何通过expect脚本发送远程脚本参数

tag-icon • tag-icon linux bash shell-script expect
如何通过expect脚本发送远程脚本参数

我有一个程序使用heredoc“stop_remoteServer_script.sh”创建动态shell脚本

下面的heredoc模板

cat<<_STOP > stop_remoteServer_script.sh
#!/bin/bash

serverName=\$1
function getServerpid {
        pid=\$( ps -ef|grep \${serverName}|grep -v grep |awk '{print \$2}' )
        echo \$pid
}

function kill_soaServer {
        echo "Killing \${serverName} ........"
        ps -ef|grep \${serverName} |grep -v grep|awk '{print \$2}'|xargs kill -9
        echo "status of killing server is $?"
}

check_soaServer=\$( getServerpid );

while [[ "X\${check_soaServer}" != "X" ]]
do
        cmd_status=\$( kill_soaServer  )
        sleep 30s
        check_soaServer=\$( getServerpid  )
done

kill_soaServer \${serverName}
_STOP

发送到远程盒子执行的实际脚本

模板输出

#!/bin/bash

serverName=$1
function getServerpid {
        pid=$( ps -ef|grep ${serverName}|grep -v grep |awk '{print $2}' )
        echo $pid
}

function kill_soaServer {
        echo "Killing ${serverName} ........"
        ps -ef|grep ${serverName} |grep -v grep|awk '{print $2}'|xargs kill -9
        echo "status of killing server is 0"
}

check_soaServer=$( getServerpid );

while [[ "X${check_soaServer}" != "X" ]]
do
        cmd_status=$( kill_soaServer  )
        sleep 30s
        check_soaServer=$( getServerpid  )
done

kill_soaServer ${serverName}

现在我有一个低于预期的代码块，它将使用服务器名称参数调用远程框中的上述生成的代码

sName=$1

CMD="ssh -o StrictHostKeyChecking=no  ${remoteUserName}\@${remoteHostName} "

# script with parameter
script="./stop_remoteServer_script.sh ${sName}"

/usr/bin/expect<<END
set force_conservative 0
spawn bash  -c "${CMD} /bin/bash < ${script} "
expect  "* password: "
send -- "${MYPWD}\r"
expect  "*$*"
expect eof

END

我收到的错误如下

spawn bash -c ssh -o StrictHostKeyChecking=no  [email protected]  /bin/bash < ./stop_remoteServer_script.sh soa_server2
[email protected]'s password:
/bin/bash: soa_server2: No such file or directory

任何人都可以帮我如何发送参数，手动它可以工作

===================

根据建议进行额外尝试：

我使用虚拟盒创建了一个简单的网络并在下面进行了尝试

主程序

#!/bin/bash
# script with parameter
echo "running exp example"
sName="abc123ibc"
script="a.sh"
echo "thes script is $script \n"
/usr/bin/expect -d <<END
set force_conservative 0
set timeout -1
set prompt "*$*"
puts "before swapn"
spawn scp ./a.sh -o StrictHostKeyChecking=no ansibleadm\@192.168.1.102:/home/ansibleadm/
expect "id_rsa*"
send -- "ansibleadm\r"
expect  "*$*"
expect eof
puts "second spawn"
spawn ssh  -o StrictHostKeyChecking=no ansibleadm\@192.168.1.102  /bin/bash -c  ./a.sh $sName > log.txt
expect "id_rsa*"
send -- "ansibleadm\r"
expect ""
puts "after spawn"
expect eof
END

还有一个a.sh

#!/bin/bash
  
sleep 12s
echo "inside swapned script"
touch ~/sample.txt
cat > ~/sample.txt<<EOF
hi suman $1
EOF

在sample.txt中我总是得到的是变量缺失的下面

[ansibleadm@AppServer ~]$ cat sample.txt 
hi suman

我已经启用了期望的调试器，下面是调试日志

[ansibleadm@Centos-Control ~]$ ./exp.sh 
running exp example
thes script is a.sh \n
expect version 5.45.4
argv[0] = /usr/bin/expect  argv[1] = -d  
set argc 0
set argv0 "/usr/bin/expect"
set argv ""
executing commands from command file
before swapn
spawn scp ./a.sh -o StrictHostKeyChecking=no [email protected]:/home/ansibleadm/
parent: waiting for sync byte
parent: telling child to go ahead
parent: now unsynchronized from child
spawn: returns {33533}

expect: does "" (spawn_id exp6) match glob pattern "id_rsa*"? no
Enter passphrase for key '/home/ansibleadm/.ssh/id_rsa': 
expect: does "\rEnter passphrase for key '/home/ansibleadm/.ssh/id_rsa': " (spawn_id exp6) match glob pattern "id_rsa*"? yes
expect: set expect_out(0,string) "id_rsa': "
expect: set expect_out(spawn_id) "exp6"
expect: set expect_out(buffer) "\rEnter passphrase for key '/home/ansibleadm/.ssh/id_rsa': "
send: sending "ansibleadm\r" to { exp6 }

expect: does "" (spawn_id exp6) match glob pattern "*"? yes
expect: set expect_out(0,string) ""
expect: set expect_out(spawn_id) "exp6"
expect: set expect_out(buffer) ""

a.sh                                                                                        100%  114   165.9KB/s   00:00    
-o: No such file or directory
StrictHostKeyChecking=no: No such file or directory
expect: read eof
expect: set expect_out(spawn_id) "exp6"
expect: set expect_out(buffer) "\r\n\ra.sh                                                                                          
 ||| 0%    0     0.0KB/s   --:-- ETA\ra.sh                                                                                        
 ||| 100%  114   165.9KB/s   00:00    \r\n-o: No such file or directory\r\nStrictHostKeyChecking=no: No such file or directory\r\n"
second spawn
spawn ssh -o StrictHostKeyChecking=no [email protected] /bin/bash -c ./a.sh abc123ibc > log.txt
parent: waiting for sync byte
parent: telling child to go ahead
parent: now unsynchronized from child
spawn: returns {33541}

expect: does "" (spawn_id exp10) match glob pattern "id_rsa*"? no
Enter passphrase for key '/home/ansibleadm/.ssh/id_rsa': 
expect: does "\rEnter passphrase for key '/home/ansibleadm/.ssh/id_rsa': " (spawn_id exp10) match glob pattern "id_rsa*"? yes
expect: set expect_out(0,string) "id_rsa': "
expect: set expect_out(spawn_id) "exp10"
expect: set expect_out(buffer) "\rEnter passphrase for key '/home/ansibleadm/.ssh/id_rsa': "
send: sending "ansibleadm\r" to { exp10 }

expect: does "" (spawn_id exp10) match glob pattern ""? yes
expect: set expect_out(0,string) ""
expect: set expect_out(spawn_id) "exp10"
expect: set expect_out(buffer) ""
after spawn

expect: read eof
expect: set expect_out(spawn_id) "exp10"
expect: set expect_out(buffer) "\r\n"
[ansibleadm@Centos-Control ~]$

答案1

你使生成过于复杂：

CMD="ssh -o StrictHostKeyChecking=no  ${remoteUserName}\@${remoteHostName} "

# script with parameter
script="./stop_remoteServer_script.sh ${sName}"

/usr/bin/expect<<END
  set force_conservative 0
  spawn ${CMD} bash ${script}
  ...

如果脚本有执行权限，你bash也可以删除。

因为 $script 变量包含空格：

  1. 这：/bin/bash < ${script}
  2. 变成这样：/bin/bash < ./stop_remoteServer_script.sh soa_server2
  3. bash 解释为：/bin/bash soa_server2 < ./stop_remoteServer_script.sh
  4. 导致“soa_server2：没有这样的文件”错误

答案2

要要求bash从 stdin 读取命令，您需要该-s选项，后跟要传递给调用的参数。例如：

$ echo 'date +$1' | bash -s %Y
2021

所以在你的命令-s后面添加。/bin/bashspawn

请注意，对于-c命令后面的参数，$0您需要首先设置，例如：

bash -c 'echo $(date +$1)' dummy %Y

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