bash/expect/loop - 如何通过 telnet 循环一个简单的 bash 脚本
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bash/expect/loop - how to loop a simple bash script doing telnet
提问by Mitchel
I would like to run this script in a loop.
我想循环运行这个脚本。
What is needs to do is read a file with in that file IP addresses like:
需要做的是读取文件中的 IP 地址，例如：
10.0.0.0
10.0.0.1
10.0.0.2
10.0.0.3
10.0.0.4
And run this script on every ip listed above here.
并在此处列出的每个 IP 上运行此脚本。
This is what i have:
这就是我所拥有的：
#!/usr/bin/expect
spawn telnet 10.0.0.0
expect "User Name :"
send "username\r"
expect "Password :"
send "password\r"
expect ">"
send "4\r"
expect "*#"
exit
How do i get the script above working every IP in a txt file.
我如何让上面的脚本在 txt 文件中的每个 IP 上工作。
回答by alvits
You can read the file within your expect script.
您可以在您的期望脚本中读取该文件。
Open the file and assign the file descriptor to a variable, read each line and execute the above code you wrote.
打开文件并将文件描述符分配给一个变量，读取每一行并执行您编写的上述代码。
set fildes [open "myhosts.txt" r]
set ip [gets $fildes]
while {[string length $ip] > 0} {
spawn telnet $ip
expect "User Name :"
send "username\r"
expect "Password :"
send "password\r"
expect ">"
send "4\r"
expect "*#"
exit
set ip [gets $fildes]
}
close $fildes
回答by glenn Hymanman
This is just a comment on @user3088572's answer. The idiomatic way to read a file line by line is:
这只是对@user3088572 的回答的评论。逐行读取文件的惯用方法是：
set fildes [open "myhosts.txt" r]
while {[gets $fildes ip] != -1} {
# do something with $ip
}
close $fildes
回答by DarkDust
I'm not an expert with expect, but the first thing you need to do is change your expect script to accept arguments. It should work like this (looks like you'll need -fin #!/usr/bin/expect):
我不是 专家expect，但您需要做的第一件事是更改您的期望脚本以接受参数。它应该像这样工作（看起来你需要-f在#!/usr/bin/expect）：
#!/usr/bin/expect -f
set ip [lindex $argv 0]
spawn telnet $ip
...
Then you can simply iterate over the list of your IPs in your bash script:
然后你可以简单地在你的 bash 脚本中迭代你的 IP 列表：
while read ip ; do
myExpectScript $ip
done < list_of_ip.txt
