期待Tcl脚本 - 使用spawn传递引用参数时出错

Question

我刚刚编写了一个非常简单的Expect脚本来包装rsync,但它似乎给了我麻烦.基本上,我正在自动化从rsync调用的SSH登录提示.我还必须通过rsync将参数传递给SSH,这样它就不会进行主机密钥检查.我很清楚SSH身份验证密钥和ssh-keygen,但我有充分的理由这样做,所以没有关于在命令行上传递密码的讲座.

脚本

---

#!/usr/local/bin/expect -f

if {$argc != 5} {
  puts "usage: remoteCopy {remotehost, username, password, localfile, remoteloc}"
  exit 1
}

set remotehost [lindex $argv 0]
set username [lindex $argv 1]
set password [lindex $argv 2]
set localfile [lindex $argv 3]
set remoteloc [lindex $argv 4]

set timeout -1

spawn rsync -e \"ssh -q -o StrictHostKeyChecking=no\" $localfile $username@$remotehost:$remoteloc
expect "Password"; send "$password\r"

以下是脚本的完整输出:

产量

---

avoelker@localhost  $ ./remoteFileCopy.tcl remotehost remoteuser remotepass ~/localfile /tmp/
spawn rsync -e "ssh -q -o StrictHostKeyChecking=no" /localhost/home/avoelker/localfile remoteuser@remotehost:/tmp/
rsync: Failed to exec "ssh: No such file or directory (2)
rsync error: error in IPC code (code 14) at pipe.c(83)
rsync: connection unexpectedly closed (0 bytes received so far) [sender]
rsync error: error in rsync protocol data stream (code 12) at io.c(434)
send: spawn id exp6 not open
    while executing
"send "$password\r""
    (file "./remoteFileCopy.tcl" line 17)
avoelker@localhost  $

在我看来,rsync试图执行"ssh而不是仅仅ssh,但是,将Expect的stdout(rsync -e "ssh -q -o StrictHostKeyChecking=no" /localhost/home/avoelker/localfile remoteuser@remotehost:/tmp/)的第一行输出直接复制并粘贴到shell中工作得非常好,所以我知道它不是rsync的问题.

当我从spawn rsync行中完全删除-e参数时,Expect脚本执行时没有错误,但我必须在脚本中添加主机密钥检查,我不想这样做.

对Expect/Tcl更有经验的人是否知道我做错了什么？

Answer 1

放下你的反斜杠.这spawn条线应该说:

spawn rsync -e "ssh -q -o StrictHostKeyChecking=no" $localfile $username@$remotehost:$remoteloc

毕竟,你不想rsync看到带引号的命令,对吗？