How to use a variable in expect body which embedded in a shell script

Similar Threads:

1.How to use a variable in expect body which embedded in a shell script

Hi all,

My question is how to use expect in a shell script. For example, here
is a little program, it just telnet to some host, and login root
automatically.

#!/bin/bash

echo "This is to test how to call expect in a shell"

#hostname=10.0.0.1

expect -c '
set timeout 15
spawn telnet 10.0.0.1
expect "login:" { send "root\r" }
expect "assword:" { send "abcd1234\r" }
interact
'

Can I use variable in the body of expect? Such as the 10.0.0.1 is a
variation passed to the shell scripts, like the following, actually
this is wrong, expect can't handle $hostname

#!/bin/bash

echo "This is to test how to call expect in a shell"

hostname=10.0.0.1

expect -c '
set timeout 15
spawn telnet $hostname
expect "login:" { send "root\r" }
expect "assword:" { send "abcd1234\r" }
interact
'

it will issue the following error.
[tina@kgardenia test]$ ./test.expect
This is to test how to call expect in a shell
can't read "hostname": no such variable
    while executing
"spawn telnet $hostname"


Does anybody know how to use a variable in the body of the expect
code, which is embedded in a bash?

Many thanks to you all :D

2.expect script with shell script

I am using expect script in shell script.
I want one value from expect script.
how can i get the value from expect script and use it in shell script?

3.Expect : Interact returns to shell instead of script

I'm new to tcl and expect, and am trying to do something very simple,
run a few commands by script, then interact, then run some more
commands.  When i'm interacting, andI enter the '+' key expecting to
return to my script, I get bounced out of the script and get a new
shell prompt.  "Hello World 2" never gets printed.

I've wondered if something in my shell set up is getting in the way,
and to that end I removed my .profile so I get a vanilla shell
environment.  (I use vi command line editing with set -o vi and
thought that was a problem, but ....)

expect version 5.42.0
Running on MacOS  v 10.4.11  inside "Terminal" application/ bash shell

#!/usr/bin/expect -f

set timeout -1

spawn $env(SHELL)
match_max 100000

send  "echo Hello World 1\r"
expect  "*$"

interact "+" return

send "echo Hello World 2\r"
expect "*$"

4.shell command as argument to expect script

Here is the scenario which is not working for me.

1. I have a shell script in BASH, which constructs a shell variable
containing some command e.g.
var=cd /usr/local/home/user/server/config; grep -i propname
properties.file

2. I called an expect script from this shell script. The purpose of
this expect script is to SSH to remote server and execute the command
mentioned in the variable $var.

3. In the Bash Script, I call the expect script in following way

expect.exp $host_name $user $password $var

4. In the Expect script, I read these command line arguments in
following way:

set host_name [lrange $argv 0 0]
set user [lrange $argv 1 1]
set password [lrange $argv 2 2]
set var [lrange $argv 3 end]

5. I spawn the ssh in expect in the following way:

spawn ssh $user@$host_name $var

Observations: It looks like that while interpreting the variable $var
(which contains the shell commands), it's appending the curly braces
and hence bash is not able to understand it. Here is the error message
I am getting:

spawn ssh  XXXX@XXXXX.COM  {cd /usr/local/site/
pvr/config/; grep -i jdbc ofoto.properties}
Password:
bash: {cd: command not found
grep: ofoto.properties}: No such file or directory
expect: spawn id exp7 not open
    while executing
"expect "*""
    (file "./ssh_prop.exp" line 36)

NOTE: Please see it's appending the curly braches while interpreating
the variable $var. Due to this bash is not able to understand and
throwing error.

Please help in this regard.

5.Problem with get exit status of shell script/command within expect

Hi, all
I'm caught in the problem with get exit status of shell script/command,
with ssh. For example:

% ssh hostname command
% echo $?

This will tell me the exit status of `command'.

The problem is that when using ssh, I need to do some interactive
thing.
Here I begin to do it with expect, like the following:
------------------------------------------------------------------------
#! /bin/bash
#

host=$1
shift
command=$@

expect_cmd=`cat << EOF
spawn ssh $host $command
set timeout -1
expect {
        "*password:" { send "xxxxxxxx\r" }
        "* (yes/no)?" { send "yes\r"; exp_continue }
        eof           exit
}
EOF`

expect -c "$expect_cmd"
echo $?
------------------------------------------------------------------------
But here I will get the exit status of `expect', not `command'.
So, how I can solve this problem?

Any help is appreciated.
Thanks in advance.

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