期望腳本錯誤發送：Spawn id exp4在執行時未打開

Question

我試圖運行此腳本，但在修改時發生了不同的錯誤。這裏是代碼和輸出。請幫忙。在後與調試信息

#!/bin/bash 
    (($# != 1)) && { echo >&2 "Usage: $0 \"[COMMAND]\""; exit 1; } 
    servers_addresses=(10.10.10.10) 
    for server_address in ${servers_addresses[@]}; do 
    expect <<EOF 
    spawn ssh -t root@$server_address "$*" 
    expect -timeout 2 "Are you sure you want to continue connecting (yes/no)?" { send "yes\n" } 
    expect "s password:" { send "Correct_Password\n" } 
    expect "s password:" { send "Wrong_Password_22222\n" } 
    expect "s password:" { send "Wrong_Password_33333\n" } 
    expect eof 
    EOF 
    done 

結束

更新和輸出是這樣的：

goldberg188@Test-Server ~$ ./test.sh "sudo cat /etc/hosts" 
    spawn ssh -t root@10.10.10.10 sudo cat /etc/hosts 
    root@10.10.10.10's password: 
    # Do not remove the following line, or various programs 
    # that require network functionality will fail. 
    10.10.10.10    TEST-004 localhost.localdomain localhost 
    ::1    localhost6.localdomain6 localhost6 
    Connection to 10.10.10.10 closed. 
    expect: spawn id exp4 not open 
     while executing 
    "expect "s password:" { send "Wrong_Password_33333\n" }" 

如果我修改這個樣子，那麼輸出會有所不同

expect "s password:" { send "Wrong_Password_11111\n" } 
    expect "s password:" { send "Correct_Password\n" } 
    expect "s password:" { send "Wrong_Password_33333\n" } 

    goldberg188@Test-Server ~$ ./test.sh "sudo cat /etc/hosts" 
    spawn ssh -t root@10.10.10.10 sudo cat /etc/hosts 
    root@10.10.10.10's password: 
    # Do not remove the following line, or various programs 
    # that require network functionality will fail. 
    10.10.10.10    TEST-004 localhost.localdomain localhost 
    ::1    localhost6.localdomain6 localhost6 
    Connection to 10.10.10.10 closed. 
    expect: spawn id exp4 not open 
     while executing 
    "expect eof" 

如果在第三行輸入正確的密碼，那麼根本沒有錯誤。在這一個上運行得很好。

expect "s password:" { send "Wrong_Password_11111\n" } 
    expect "s password:" { send "Wrong_Password_22222\n" } 
    expect "s password:" { send "Correct_Password\n" } 


    goldberg188@Test-Server ~$ ./test.sh "sudo cat /etc/hosts" 
    spawn ssh -t root@10.10.10.10 sudo cat /etc/hosts 
    root@10.10.10.10's password: 
    # Do not remove the following line, or various programs 
    # that require network functionality will fail. 
    10.10.10.10    TEST-004 localhost.localdomain localhost 
    ::1    localhost6.localdomain6 localhost6 
    Connection to 10.10.10.10 closed. 

更新：調試信息 - 修正至

exp_internal 1 
    expect "s password:" { send "Wrong_Password_11111\n" } 
    expect "s password:" { send "Correct_Password\n" } 
    expect "s password:" { send "Wrong_Password_33333\n" } 

輸出：

goldberg188@Test-Server ~$ ./test.sh "sudo cat /etc/host" 
    spawn ssh -t root@10.10.10.10 sudo cat /etc/host 
    root@10.10.10.10's password: 
    expect: does "root@10.10.10.10's password: " (spawn_id exp4) match glob pattern "s password:"? yes 
    expect: set expect_out(0,string) "s password:" 
    expect: set expect_out(spawn_id) "exp4" 
    expect: set expect_out(buffer) "root@10.10.10.10's password:" 
    send: sending "Wrong_Password_11111\n" to { exp4 } 

    expect: does " " (spawn_id exp4) match glob pattern "s password:"? no 


    expect: does " \r\n" (spawn_id exp4) match glob pattern "s password:"? no 
    Permission denied, please try again. 
    root@10.10.10.10's password: 
    expect: does " \r\nPermission denied, please try again.\r\r\nroot@10.10.10.10's password: " (spawn_id exp4) match glob pattern "s password:"? yes 
    expect: set expect_out(0,string) "s password:" 
    expect: set expect_out(spawn_id) "exp4" 
    expect: set expect_out(buffer) " \r\nPermission denied, please try again.\r\r\nroot@10.10.10.10's password:" 
    send: sending "Correct_Password\n" to { exp4 } 

    expect: does " " (spawn_id exp4) match glob pattern "s password:"? no 


    expect: does " \r\n" (spawn_id exp4) match glob pattern "s password:"? no 
    cat: /etc/host: No such file or directory 
    Connection to 10.10.10.10 closed. 

    expect: does " \r\ncat: /etc/host: No such file or directory\r\r\nConnection to 10.10.10.10 closed.\r\r\n" (spawn_id exp4) match glob pattern "s password:"? no 
    expect: read eof 
    expect: set expect_out(spawn_id) "exp4" 
    expect: set expect_out(buffer) " \r\ncat: /etc/host: No such file or directory\r\r\nConnection to 10.10.10.10 closed.\r\r\n" 
    expect: spawn id exp4 not open 
     while executing 
    "expect eof" 

Answer 1

根據你的代碼，它看起來像ssh連接得到的給予了幾條小道後關閉密碼ssh會話。

每當有一個新進程產生spawn命令，則expect會將該預期進程的spawn_id保存爲expect_out(spawn_id)。當它遇到

 spawn ssh -t root@$server_address "$*" 

您已如下圖所示的調試產生

根據你的代碼，期望的spawn_id在。

spawn ssh -t root@10.10.10.10 sudo cat /etc/host 
    root@10.10.10.10's password: 
    expect: does "root@10.10.10.10's password: " (spawn_id exp4) match glob pattern "s password:"? yes 
    expect: set expect_out(0,string) "s password:" 
    expect: set expect_out(spawn_id) "exp4" 

正如你可以在調試信息看到，expect_out(spawn_id)持有由它來期待這是你的情況exp4值spawn_id。

正如您所看到的，連接在幾條錯誤路徑後關閉，從而使進程exp4不再在上下文中退出。由於spawn_id認爲是相同的，期望會嘗試期望從該過程中失敗。

你可以參考this問才知道這個spawn_id正在如何與

Answer 2

我從 https://serverfault.com/questions/642129/expect-script-error-send-spawn-id-exp4-not-open-while-executing

由於https://serverfault.com/users/30957/glenn-jackman一些信息後，這是固定的標準輸入（從控制檯讀取輸入）使用