[SOLVED] how to change the interperter in the middle of the script

auma78 · 01-19-2011, 10:31 AM

hi
i am running a script that reads some inuts and do some text modification in it, then i will have to telnet to a remote server to execute some commands within the same script. the problem is on the first part i am under #!/bin/bash. Later when i have to connect to the remote server i have to switch to #!/usr/bin/expect.... as the default shell does not recongnize (expect and send commands).. also the /bin/expect shell does not recognize some commands like echo. is there a way to switch the shell in the middle of a running script?

#! /bin/bash
echo "enter the id"
read id
...
....
...
#!/usr/bin/expect
spawn telnet 172.20.64.133
expect "ENTER USERNAME <"
send "kkkk\r"
expect "ENTER PASSWORD <"
..
...
...

tsg · 01-19-2011, 10:53 AM

I'm not aware of anyway to do that, but is there any reason why you can't have two separate scripts, one interpreted by bash that passes the necessary parameters to the one interpreted by expect?

[edit]
Alternatively, you can use a "here document" to supply the commands to expect, which is called by the bash script.

eg.:

Code:

#! /bin/bash
echo "enter the id"
read id
...
...
...
/usr/bin/expect <<LimitString
spawn telnet 172.20.64.133
expect "ENTER USERNAME <"
send "kkkk/r"
expect "ENTER PASSWORD<"
...
...
...
LimitString

Snark1994 · 01-19-2011, 11:14 AM

You can use expect for all of it, then any lines which need to be in bash can be run using

Code:

#!/usr/bin/expect
bash -c "echo foo"

There's probably a similar option for expect, but I don't currently have that installed on my system

corp769 · 01-19-2011, 03:34 PM

Or you could do it the other way, which IMO would be easier...

Code:

#!/bin/bash
...
...
path1=`which expect`
`$path1 spawn telnet 172.20.64.133`

Something like that... I would test it, but I'm at work.

And snark, I gave you rep yesterday just so you can love me

auma78 · 01-20-2011, 06:04 AM

thanks guys,
tsg way worked fine

the second one gives me (bash : unknown command name)
i will test the 3rd one as well.

corp769 · 01-20-2011, 09:28 AM

Yeah, the limitstring way would work out just as well. Props to him :P

tsg · 01-20-2011, 09:42 AM

Quote:

Originally Posted by corp769

Yeah, the limitstring way would work out just as well. Props to him :P

Am I missing something?

Snark1994 · 01-20-2011, 09:46 AM

Quote:

Am I missing something?

No, I think he was just saying your solution was as good as his

@auma78:Well done for giving rep to tsg - if it's solved, then it's also polite to mark the thread as '[SOLVED]' (using the Thread Tools menu).

@corp769: it's okay, I love you already

tsg · 01-20-2011, 09:50 AM

Quote:

Originally Posted by Snark1994

No, I think he was just saying your solution was as good as his

Ah, okay. My sarcasm detector is on the fritz again

corp769 · 01-20-2011, 09:55 AM

Teehee, snark, .... ehh, I would get banned if I said what I wanted to say... LOL

auma78 · 01-20-2011, 11:09 AM

sorry i am new here

i will mark it as [sloved]