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Full Discussion: Expect Script square bracket dollar prompt
Top Forums Shell Programming and Scripting Expect Script square bracket dollar prompt Post 302400732 by Ikaro0 on Thursday 4th of March 2010 03:32:40 AM
Old 03-04-2010
Hi,
Thanks a log for the quick replay but I think it is not good cause it sems that no matter what if founds it continues.

I'll explain better the situation:

Environment: Production, servers don't allow for root ssh connections.

The need that I had was to create a script for creating users on all the servers (more than 200 Unix,Linux)

What I've done so far is:

I had created a script that login each server with gets "user login name", "user password" and "user to be created"

The the script reads from a file, the servername and rootpassword and apss all the information to the expect script in form of parameters

The expect script uses the parameters ($0 $1.....) for connecting to the servers as the entered user, puts the password, changes to root, sends useradd....."user to be created" and then logs of and continue to the next one.

The thing here is that the script works but due to differences on the servers I need to cover all the posibilities for it to work fast and without error.

for login I had the following at the script:

spawn ssh $username@$ipaddr
match_max 100000
Code:
expect_after {
    eof {send_log "\nEXP-ERROR---No se ha podido conectar con $ipaddr\n" ; exit 1 }
}
expect {
        timeout {send_log "\nEXP-ERROR---TIMEOUT No se ha podido conectar con $ipaddr\n" ; exit 1 }
        "(yes/no)?"   {send "yes\n"}
        "*?assword:" {send "$userpass\r"}
        }

and then :

Code:
expect  {
        ".*\?"      {send "\n";sleep 1;send "\n"} ----for servers that ask for oraclehome
        ".*\$"          {send_log "\nEXP-EXEC---Login correcto\n"}
        "*?assword:"    {send_log "\nEXP-ERROR---Password de usuario $username incorrecto o usuario inexistente en $ipaddr" ; exit 1 }
        }

because I set timeout to -1 the script waits for ever when it logs into a server with the prompt "[whatever]$"

but putting the timeout to 5(for example) I pass (waiting) the $ paths and after entered "su -" and password, it recognise well the "[whatever]#" prompt for root and don't wait at all, sending the useradd command in no time.

Thanks a lot
 

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LEARN ABOUT CENTOS

fence_rsb

FENCE_AGENT(8)						      System Manager's Manual						    FENCE_AGENT(8)

NAME

       fence_rsb - I/O Fencing agent for Fujitsu-Siemens RSB

DESCRIPTION

       fence_rsb  is  an I/O Fencing agent which can be used with the Fujitsu-Siemens RSB management interface. It logs into device via telnet/ssh
       and reboots a specified outlet. Lengthy telnet/ssh connections should be avoided while a GFS cluster is running because the connection will
       block any necessary fencing actions.

       fence_rsb  accepts  options  on	the  command  line  as	well as from stdin. Fenced sends parameters through stdin when it execs the agent.
       fence_rsb can be run by itself with command line options.  This is useful for testing and for turning outlets on or off from scripts.

       Vendor URL: http://www.fujitsu.com

PARAMETERS


       -a, --ip=[ip]
	      IP Address or Hostname This parameter is always required.

       -l, --username=[name]
	      Login Name This parameter is always required.

       -p, --password=[password]
	      Login password or passphrase

       -x, --ssh
	      SSH connection

       -c, --command-prompt=[prompt]
	      Force Python regex for command prompt (Default Value: ['to quit:'])

       -u, --ipport=[port]
	      TCP/UDP port to use for connection with device (Default Value: 3172)

       -4, --inet4-only
	      Forces agent to use IPv4 addresses only

       -6, --inet6-only
	      Forces agent to use IPv6 addresses only

       -S, --password-script=[script]
	      Script to retrieve password

       -k, --identity-file=[filename]
	      Identity file for ssh

       --ssh-options=[options]
	      SSH options to use

       -o, --action=[action]
	      Fencing Action (Default Value: reboot)

       -v, --verbose
	      Verbose mode

       -D, --debug-file=[debugfile]
	      Write debug information to given file

       -V, --version
	      Display version information and exit

       -h, --help
	      Display help and exit

       --power-timeout=[seconds]
	      Test X seconds for status change after ON/OFF (Default Value: 20)

       --shell-timeout=[seconds]
	      Wait X seconds for cmd prompt after issuing command (Default Value: 3)

       --login-timeout=[seconds]
	      Wait X seconds for cmd prompt after login (Default Value: 5)

       --power-wait=[seconds]
	      Wait X seconds after issuing ON/OFF (Default Value: 0)

       --delay=[seconds]
	      Wait X seconds before fencing is started (Default Value: 0)

       --retry-on=[attempts]
	      Count of attempts to retry power on (Default Value: 1)

ACTIONS


       on     Power on machine.

       off    Power off machine.

       reboot Reboot machine.

       status This returns the status of the plug/virtual machine.

       list   List available plugs with aliases/virtual machines if there is support for more then one device. Returns N/A otherwise.

       monitor
	      Check the health of fence device

       metadata
	      Display the XML metadata describing this resource.

STDIN PARAMETERS


       ipaddr IP Address or Hostname This parameter is always required.

       login  Login Name This parameter is always required.

       passwd Login password or passphrase

       secure SSH connection

       cmd_prompt
	      Force Python regex for command prompt (Default Value: ['to quit:'])

       ipport TCP/UDP port to use for connection with device (Default Value: 3172)

       inet4_only
	      Forces agent to use IPv4 addresses only

       inet6_only
	      Forces agent to use IPv6 addresses only

       passwd_script
	      Script to retrieve password

       identity_file
	      Identity file for ssh

       ssh_options
	      SSH options to use

       action Fencing Action (Default Value: reboot)

       verbose
	      Verbose mode

       debug  Write debug information to given file

       version
	      Display version information and exit

       help   Display help and exit

       power_timeout
	      Test X seconds for status change after ON/OFF (Default Value: 20)

       shell_timeout
	      Wait X seconds for cmd prompt after issuing command (Default Value: 3)

       login_timeout
	      Wait X seconds for cmd prompt after login (Default Value: 5)

       power_wait
	      Wait X seconds after issuing ON/OFF (Default Value: 0)

       delay  Wait X seconds before fencing is started (Default Value: 0)

       retry_on
	      Count of attempts to retry power on (Default Value: 1)

fence_rsb (Fence Agent) 					    2009-10-20							    FENCE_AGENT(8)
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