呼叫“期望" C ++流程中的脚本 [英] Call "expect" script in C++ process

问题描述

我实现了一个使用Expect/spawn的shell，并从远程服务器向SCP文件发送命令，该服务器会在需要时自动发送密码.

I realized a shell using expect/spawn and send commands to SCP files from a remote server which send automatically the password when it is needed.

该脚本在UNIX终端上可以正常工作.

The script works fine on UNIX terminal.

尽管如此，我还是尝试通过C ++进程使用此脚本.它已经被system()甚至popen()函数调用而没有成功. 返回此错误:"ioctl(raw):I/O错误" 有人可能有任何线索吗?

Nevertheless, I tried to use this script throough a C++ process. It has been called by system() or even popen() function without sucess. This error is returned: "ioctl(raw): I/O error" Someone could have any clue?

这是我的脚本:

 #!/bin/bash
 targetHost=$1
 password=$2
 sourceFile=$3

 destRep=$4       
 expect -c "        
        spawn /usr/bin/scp -q $targetHost:$sourceFile $destRep
        expect -i $spawn_id { 
          "*password:*" { send -i $spawn_id $password\r\n; interact } 
          eof { exit }
        }
        exit
        "

推荐答案

我要尝试的第一件事是抛弃bash脚本(无论如何似乎都在引用问题)

The first thing I'd try is to ditch the bash script (there appear to be quoting issues anyway)

#! /usr/bin/env expect -f
foreach {targetHost password sourceFile destRep} $argv break
spawn /usr/bin/scp -q $targetHost:$sourceFile $destRep
expect -i $spawn_id { 
    "*password:*" { send -i $spawn_id $password\r; interact } 
    eof { exit }
}

但是真正的问题是stdio频道/pty是如何通过期望过程继承的(我不确定此处是否使用正确的术语)

But the real problem is how the stdio channels/pty get inherited by the expect process (I'm not sure of the proper terminology here)

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