Gheek.net

January 27, 2008

nixlogin_exp

Filed under: bigip, expect, f5, linux, nix, rancid — Tags: , , , , , — lancevermilion @ 11:52 pm

In order to get this to work you will need to add something like this to your .cloginrc

add userprompt linuxsvr* sshOnlyNoPrompt
add autoenable linuxsvr* 1
add user linuxsvr*

#! /usr/bin/expect --
##
## $Id: clogin.in,v 1.79 2004/05/27 21:57:52 heas Exp $
##
## Copyright (C) 1997-2004 by Terrapin Communications, Inc.
## All rights reserved.
##
## This software may be freely copied, modified and redistributed
## without fee for non-commerical purposes provided that this license
## remains intact and unmodified with any RANCID distribution.
##
## There is no warranty or other guarantee of fitness of this software.
## It is provided solely "as is".  The author(s) disclaim(s) all
## responsibility and liability with respect to this software's usage
## or its effect upon hardware, computer systems, other software, or
## anything else.
##
## Except where noted otherwise, rancid was written by and is maintained by
## Henry Kilmer, John Heasley, Andrew Partan, Pete Whiting, and Austin Schutz.
##
#
# The login expect scripts were based on Erik Sherk's gwtn, by permission.
#
# clogin - Cisco login
#
# Most options are intuitive for logging into a Cisco router.
# The default is to enable (thus -noenable).  Some folks have
# setup tacacs to have a user login at priv-lvl = 15 (enabled)
# so the -autoenable flag was added for this case (don't go through
# the process of enabling and the prompt will be the "#" prompt.
# The default username password is the same as the vty password.
#

# Usage line
set usage "Usage: $argv0 \[-autoenable\] \[-noenable\] \[-c command\] \
\[-Evar=x\] \[-e enable-password\] \[-f cloginrc-file\] \[-p user-password\] \
\[-s script-file\] \[-t timeout\] \[-u username\] \
\[-v vty-password\] \[-w enable-username\] \[-x command-file\] \
\[-y ssh_cypher_type\] router \[router...\]\n"

# env(CLOGIN) may contain:
#	x == do not set xterm banner or name

# Password file
set password_file $env(HOME)/.cloginrc
# Default is to login to the router
set do_command 0
set do_script 0
# The default is to automatically enable
set avenable 1
# The default is that you login non-enabled (tacacs can have you login already
# enabled)
set avautoenable 0
# The default is to look in the password file to find the passwords.  This
# tracks if we receive them on the command line.
set do_passwd 1
set do_enapasswd 1
# attempt at platform switching.
set platform ""

# Find the user in the ENV, or use the unix userid.
if {[ info exists env(CISCO_USER) ] } {
    set default_user $env(CISCO_USER)
} elseif {[ info exists env(USER) ]} {
    set default_user $env(USER)
} elseif {[ info exists env(LOGNAME) ]} {
    set default_user $env(LOGNAME)
} else {
    # This uses "id" which I think is portable.  At least it has existed
    # (without options) on all machines/OSes I've been on recently -
    # unlike whoami or id -nu.
    if [ catch {exec id} reason ] {
	send_error "\nError: could not exec id: $reason\n"
	exit 1
    }
    regexp {\(([^)]*)} "$reason" junk default_user
}

# Sometimes routers take awhile to answer (the default is 10 sec)
set timeout 45

# Process the command line
for {set i 0} {$i  (enable) " }
	-re "(denied|Sorry|Incorrect)"	{
			  # % Access denied - from local auth and poss. others
			  send_user "\nError: Check your Enable passwd\n";
			  return 1
			}
	"% Error in authentication" {
			  send_user "\nError: Check your Enable passwd\n"
			  return 1
			}
	"% Bad passwords" {
			  send_user "\nError: Check your Enable passwd\n"
			  return 1
			}
    }
    # We set the prompt variable (above) so script files don't need
    # to know what it is.
    set in_proc 0
    return 0
    puts "past expect enable prompt"
}

# Run commands given on the command line.
proc run_commands { prompt command } {
    global in_proc platform
    set in_proc 1

    # If the prompt is (enable), then we are on a switch and the
    # command is "set length 0"; otherwise its "term length 0".
    # skip if its an extreme (since the pager can not be disabled on a
    # per-vty basis).
    if { [ string compare "extreme" "$platform" ] } {
	if [ regexp -- ".*> .*enable" "$prompt" ] {
	    send "\r"
	    #send "set length 0\r"
	    # This is ugly, but reduces code duplication, allowing the
	    # subsequent expects to handle everything as normal.
	    set command "set logging session disable;$command"
	} else {
	    #send "term length 0\r"
	    send "\r"
	}
	# escape any parens in the prompt, such as "(enable)"
	regsub -all {[)(]} $prompt {\\&} reprompt
	# match cisco config mode prompts too, such as router(config-if)#,
	# but catalyst does not change in this fashion.
	regsub -all {^(.{1,14}).*([#>])$} $reprompt {\1([^#>\r\n]+)?[#>](\\([^)\\r\\n]+\\))?} reprompt
	expect {
	    -re $reprompt	{}
	    -re "\[\n\r]+"	{ exp_continue }
	}
    } else {
	regsub -all "\[)(]" $prompt {\\&} reprompt
    }

    # this is the only way i see to get rid of more prompts in o/p..grrrrr
    log_user 0
    # Is this a multi-command?
    if [ string match "*\;*" "$command" ] {
	set commands [split $command \;]
	set num_commands [llength $commands]
	# the pager can not be turned off on the PIX, so we have to look
	# for the "More" prompt.  the extreme is equally obnoxious, with a
	# global switch in the config.
	for {set i 0} {$i < $num_commands} { incr i} {
	    send "[subst -nocommands [lindex $commands $i]]\r"
	    expect {
		-re "\b+"			{ exp_continue }
		-re "^\[^\n\r *]*$reprompt"	{ send_user -- "$expect_out(buffer)"
						}
		-re "^\[^\n\r]*$reprompt."	{ send_user -- "$expect_out(buffer)"
						  exp_continue }
		-re "\[\n\r]+"			{ send_user -- "$expect_out(buffer)"
						  exp_continue }
		-re "\[^\r\n]*Press  to cont\[^\r\n]*"	{
						  send " "
						  # bloody ^[[2K after " "
						  expect {
							-re "^\[^\r\n]*\r" {}
							}
						  exp_continue
						}
		-re "^ *--More--\[^\n\r]*"	{
						  send " "
						  exp_continue }
		-re "^\[^\n\r]*"	{
						  send_user -- "$expect_out(buffer)"
						  send " "
						  exp_continue }
	    }
	}
    } else {
	# the pager can not be turned off on the PIX, so we have to look
	# for the "More" prompt.  the extreme is equally obnoxious, with a
	# global switch in the config.
	send "[subst -nocommands $command]\r"
	expect {
		-re "\b+"			{ exp_continue }
		-re "^\[^\n\r *]*$reprompt"	{ send_user -- "$expect_out(buffer)"
						}
		-re "^\[^\n\r]*$reprompt."	{ send_user -- "$expect_out(buffer)"
						  exp_continue }
		-re "\[\n\r]+"			{ send_user -- "$expect_out(buffer)"
						  exp_continue }
		-re "\[^\r\n]*Press  to cont\[^\r\n]*"	{
						  send " "
						  # bloody ^[[2K after " "
						  expect {
							-re "^\[^\r\n]*\r" {}
							}
						  exp_continue
						}
		-re "^ *--More--\[^\n\r]*"	{
						  send " "
						  exp_continue }
		-re "^\[^\n\r]*"	{
						  send_user -- "$expect_out(buffer)"
						  send " "
						  exp_continue }
	}
    }
    log_user 1

    if { [ string compare "extreme" "$platform" ] } {
	send "\rexit\r"
    } else {
	send "\rquit\r"
    }
    expect {
	-re "^\[^\n\r *]*$reprompt"		{
						  # the Cisco CE and Jnx ERX
						  # return to non-enabled mode
						  # on exit in enabled mode.
						  send "\rexit\r"
						  exp_continue;
						}
	"Do you wish to save your configuration changes" {
						  send "n\r"
						  exp_continue
						}
	-re "\[\n\r]+"				{ exp_continue }
	timeout					{ return 0 }
	eof					{ return 0 }
    }
    set in_proc 0
}

#
# For each router... (this is main loop)
#
source_password_file $password_file
set in_proc 0
foreach router [lrange $argv $i end] {
    set router [string tolower $router]
    send_user "$router\n"

    # Figure out prompt.
    # Since autoenable is off by default, if we have it defined, it
    # was done on the command line. If it is not specifically set on the
    # command line, check the password file.
    if $avautoenable {
	set autoenable 1
	set enable 0
	set prompt "(#| \\(enable\\))"
    } else {
	set ae [find autoenable $router]
	if { "$ae" == "1" } {
	    set autoenable 1
	    set enable 0
	    set prompt "(#| \\(enable\\))"
	} else {
	    set autoenable 0
	    set enable $avenable
	    set prompt "(\\$|\\>|\\:)"
	    #set prompt ">"
            puts "prompt: $prompt"
	}
    }

    # look for noenable option in .cloginrc
    if { [find noenable $router] != "" } {
	set enable 0
    }

    # Figure out passwords
    if { $do_passwd || $do_enapasswd } {
      set pswd [find password $router]
      if { [llength $pswd] == 0 } {
	send_user "\nError: no password for $router in $password_file.\n"
	continue
      }
      if { $enable && $do_enapasswd && $autoenable == 0 && [llength $pswd]  \\\(enable\\\)"	{
				  set junk $expect_out(0,string);
				  regsub -all "\[\]\[]" $junk {\\&} prompt;
				}
    }

    if { $do_command } {
	if {[run_commands $prompt $command]} {
	    continue
	}
    } elseif { $do_script } {
	# If the prompt is (enable), then we are on a switch and the
	# command is "set length 0"; otherwise its "term length 0".
	if [ regexp -- ".*> .*enable" "$prompt" ] {
	    #send "set length 0\r"
	    send "\r"
	    send "set logging session disable\r"
	} else {
	    #send "term length 0\r"
	    send "\r"
	}
	expect -re $prompt	{}
	source $sfile
	close
    } else {
	label $router
	log_user 1
	interact
    }

    # End of for each router
    wait
    sleep 0.3
}
exit 0
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