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Full Discussion: Using expect script in a shell script
Top Forums Shell Programming and Scripting Using expect script in a shell script Post 302076238 by System Shock on Saturday 10th of June 2006 08:54:03 AM
Old 06-10-2006
I wish I could give you some links. I bought the O'Reilly book many years ago and that's how I learned it, and still use the book as reference when I need it.

If you are just going to run some regular line commands, here's an example to get you started:

Say you have a file with a list of IP address, and want to telnet to each IP address and add a user named user1 and set the user's passwd to "newpassword".

You could pass the IP addresses to the script with a loop like the one I used as an example, or use an array, etc.. but say you use a loop like the example above as root, then your expect script would look like:

Code:
#!/usr/local/bin/expect --  # or wherever your expect executable is
spawn telnet [lindex $argv 0] # again, equal to $x in the example above
expect ogin:   # tell expect to, well, expect the login prompt
send username\r     # need to use \r as carriage return.
expect ssword:
send your_passwd\r
expect "your_prompt"   # put it in quotation marks in case it has  $ or > etc...
send "useradd -u10001 -g10 -s/usr/bin/ksh -d/export/home/user -m user1\r" # need quotes for commands with more than 1 word in them.
expect "your_prompt"
send "passwd user1\r"   
expect ssword:
send newpasswd\r
expect ssword:
send newpasswd\r
expect "your_prompt"
send exit\
expect closed
exit 0

Personally, all of my boxes have ssh and keys, so I spawn ssh and have no need to include passwds.
Oh, and remember to use the last of the string that you tell expect to expect: if the line is "Enter new passwd:" , while it will run if you tell expect to expect "Enter", it'll run faster if you use the last of the string, as in "ssword:".

As with ksh, csh, perl, etc, there are many ways to accomplish the same task. The above is just a basic example that you can use as a guide if you only need to run simple commands. It gets a little more complicated when you expect either one string or another , when you use editing commands like sed or awk, when you pass variables to the commands you are executing within expect (as in send "echo $PATH", for example), and so on.
 

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LEARN ABOUT SUNOS

script

script(1)							   User Commands							 script(1)

NAME

       script - make record of a terminal session

SYNOPSIS

       script [-a] [filename]

DESCRIPTION

       The  script  utility  makes a record of everything printed on your screen. The record is written to filename. If no file name is given, the
       record is saved in the file typescript. See WARNINGS.

       The script command forks and creates a sub-shell, according to the value of $SHELL, and records the text from this session. The script ends
       when the forked shell exits or when Control-d is typed.

OPTIONS

       The following option is supported:

       -a	Appends the session record to filename, rather than overwriting it.

NOTES

       script places everything that appears on the screen in filename, including prompts.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWcsu			   |
       +-----------------------------+-----------------------------+
       |CSI			     |Enabled			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       attributes(5)

WARNINGS

       script  can  pose  a  security risk when used in directories that are writable by other users (for example, /tmp), especially when run by a
       privileged user, that is, root. Be sure that typescript is not a link before running script.

SunOS 5.10							    30 Jan 2004 							 script(1)
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