Bash 函数仅在手动输入密码时有效

Question

在工作中，我每天都必须运行以下函数。当系统提示我输入密码时，该函数可以正常工作。但是，我尝试对密码进行硬编码，这样就不必每天都输入密码。这不起作用。有什么提示吗？

function update()
{
  firewalluser=`whoami`
  # -s => silent (no echo of characters), -p => prompt user
  #read -s -p "Password: " firewallpass                                         
  firewallpass="mypassword"                                                     
  TRUSTED=(
    xxx.yyy.com
    jenkins.xxx.com
    svn.xxx.com
  )
  for server in ${TRUSTED[*]}
  do
    echo ""
    echo "--> connecting to $server"
    expect <<EOF                                                                
      set timeout 20                                                            
      spawn telnet $server                                                      
      expect "Username: "                                                       
      send "$firewalluser\r"                                                    
      expect "Password: "                                                       
      send "$firewallpass\r"                                                    
      expect "Firewall User Authentication: Accepted"                           
      send "exit"                                                               
      exit                                                                      
EOF                                                                             
  done
}

GNU bash, version 3.2.53(1)-release (x86_64-apple-darwin13)我正在使用我定义的函数运行这个.bash_profile。

提前致谢。

编辑：我添加了exp_internal 1，这里是程序的响应：

--> connecting to some.domain.name.com
spawn telnet some.domain.name.com
parent: waiting for sync byte
parent: telling child to go ahead
parent: now unsynchronized from child
spawn: returns {64289}

expect: does "" (spawn_id exp7) match glob pattern "Username: "? no
Trying xx.yy.zz...

expect: does "Trying xx.yy.zz...\r\n" (spawn_id exp7) match glob pattern "Username: "? no
Connected to some.domain.name.com.
Escape character is '^]'.

expect: does "Trying xx.yy.zz...\r\nConnected to some.domain.name.com.\r\nEscape character is '^]'.\r\n" (spawn_id exp7) match glob pattern "Username: "? no
Please Authenticate to VSD DR2
Username:
expect: does "Trying xx.yy.zz...\r\nConnected to some.domain.name.com.\r\nEscape character is '^]'.\r\nPlease Authenticate to VSD DR2\r\nUsername: " (spawn_id exp7) match glob pa\
tern "Username: "? yes
expect: set expect_out(0,string) "Username: "
expect: set expect_out(spawn_id) "exp7"
expect: set expect_out(buffer) "Trying xx.yy.zz...\r\nConnected to some.domain.name.com.\r\nEscape character is '^]'.\r\nPlease Authenticate to VSD DR2\r\nUsername: "
send: sending "nklosterman\r" to { exp7 }

expect: does "" (spawn_id exp7) match glob pattern "Password: "? no

Password:
expect: does "\r\nPassword: " (spawn_id exp7) match glob pattern "Password: "? yes
expect: set expect_out(0,string) "Password: "
expect: set expect_out(spawn_id) "exp7"
expect: set expect_out(buffer) "\r\nPassword: "
send: sending "mypassword!\r" to { exp7 }

expect: does "" (spawn_id exp7) match glob pattern "Firewall User Authentication: Accepted"? no

Firewall User Authentication: Failed

expect: does "\nFirewall User Authentication: Failed\r\n" (spawn_id exp7) match glob pattern "Firewall User Authentication: Accepted"? no
Connection closed by foreign host.

expect: does "\nFirewall User Authentication: Failed\r\nConnection closed by foreign host.\r\n" (spawn_id exp7) match glob pattern "Firewall User Authentication: Accepted"? no
expect: read eof
expect: set expect_out(spawn_id) "exp7"
expect: set expect_out(buffer) "\nFirewall User Authentication: Failed\r\nConnection closed by foreign host.\r\n"
send: sending "exit" to { exp7 send: spawn id exp7 not open
    while executing
    "send "exit""

我可以看到我的密码被发送时附加了 \r。我不确定它为什么不接受它。我甚至尝试在 heredoc 中硬编码我的密码，而不是设置变量，但这没有用。

Answer 1

它看起来像是回车符与换行符的问题。

您的活动终端可能与远程系统不匹配，某些自动翻译可能不正确。您可以使用stty(1)命令。

来自预计文档：

在这种情况下，当您按下回车键时，它将被转换为换行符。如果 Expect 随后将其传递给将其终端设置为原始模式的程序（如 telnet），则会出现问题，因为该程序需要真正的返回。

解决方案不是手动用回车符替换换行符，而是使用命令“stty raw”，这将停止翻译。但请注意，这意味着您将不再获得经过处理的行编辑功能。

我建议您尝试在代码中替换。如果这仍然不起作用，则可能需要两者才能工作。如果仍然不起作用\r，您将不得不排除两个系统的终端模式故障，以及回车符和换行符来回移动时会发生什么。\n\r\n

此外，这当然假设您有正确的密码！;)