expect

dbdbdb · 12-03-2009, 11:44 PM

hi,

I am using Expect to login with ssh..
thats ok..

after login, I tried to append a text to a file.

my code:

Code:

...
<ssh login>
...
send "echo $textvalue >> file.txt\r";

but the $textvalue does not appended on file.txt

what's wrong with the code?

thanks!
(sorry for my english)

dbdbdb · 12-04-2009, 11:26 AM

I also tried with "spawn" command instead "send"
but it does not work anyway

there's another way to append string to file in expect script?

thanks

neonsignal · 12-05-2009, 09:36 AM

You might need to provide more of your script. The section you have shown here is not the cause of the problem. The send command merely sends the characters to the spawned process, so the redirection characters are not treated any differently.

For example, the following script successfully appends a string to a remote file (I am using '$' to match prompts, and the ssh is done through identity files to simplify the script):

Code:

#!/usr/bin/expect
set textvalue abc
spawn ssh server
expect "$"
send "echo $textvalue >>file.txt\r"
expect "$"
send "exit\r"
expect eof

What does your script display when it executes? Does it even execute the echo command? You can capture the output using the following:

Code:

expect yourscript &>expect.out