How to automate login procedure? 2

[mgrabovac]

Hi guys,
I would like to ask all Unix experts on this forum one question.
I need to write shell script which will automate login/password procedure.I need to call Unix command &quot;su - <username> &quot; and to supply password for selected username in the script.
Thanks in advance for all answers.
Alex

 

[Chapter11]

Not possible. Have you tried sudo?

 

[mrjazz]

Hi Alex,

my suggestion is to install Secure Shell.

The authentication can then be realised via private/public key rather than a password. If you transfer a user's public key to a remote server that he wants to connect to, then this user can login over the SSH protocol without being prompted for his password. This method is much safer than telnet, r-commands, ftp anyway.
Another advantage is the encryption of the whole session and the guaranteed data integrity!

Have a look at

http://www.openssh.com

or

http://www.ssh.com

to get the details.

HTH,

mrjazz

 

[marsd]

Yes, you can do this.
Use expect.

http://expect.nist.gov

here is a sample script:
#!/usr/bin/expect

log_user 0
set timeout 1200

proc debug {} {
global argv
if {[regexp &quot;debug&quot; $argv]} {
exp_internal 1
} else {
send_user &quot;No debug enabled.\n&quot;
}
}

proc sup { pass } {
global timeout
set rootprompt &quot;root@[exec uname -n]:.*&quot;
spawn -noecho su
expect {
-re &quot;Passwor.+&quot; {
send &quot;$pass\r&quot;
expect {
-re &quot;$rootprompt&quot; {
send_user &quot;\nRoot login successful..\n&quot;
send &quot;\r&quot;
interact {
&quot;quit&quot; {send_user &quot;\n&quot; ; exit}
}
}
}
}
-re &quot;^(su .+&quot; {
send_user &quot;Bad password..\n&quot;
return
}
}
}
debug
send_user &quot;Password: &quot;
stty -echo
expect_user -re &quot;(.*)\n&quot; {set pass $expect_out(1,string)}
stty echo
sup $pass

 

[mgrabovac]

Hi all,
thanks for all your responses.
I'll try some of the proposed solutions and see how it works.
Thanks again.
alex

 

[aixmurderer]

Expect would be my first choice too. IBM Certified Confused - MQSeries
IBM Certified Flabbergasted - AIX 5 pSeries System Administration