mrvlogin

#! /opt/local/bin/expect --
##
## $Id: mrvlogin.in 3636 2017-04-13 17:45:01Z heas $
##
## rancid 3.7
## Copyright (c) 1997-2017 by Henry Kilmer and John Heasley
## All rights reserved.
##
## This code is derived from software contributed to and maintained by
## Henry Kilmer, John Heasley, Andrew Partan,
## Pete Whiting, Austin Schutz, and Andrew Fort.
##
## Redistribution and use in source and binary forms, with or without
## modification, are permitted provided that the following conditions
## are met:
## 1. Redistributions of source code must retain the above copyright
##    notice, this list of conditions and the following disclaimer.
## 2. Redistributions in binary form must reproduce the above copyright
##    notice, this list of conditions and the following disclaimer in the
##    documentation and/or other materials provided with the distribution.
## 3. All advertising materials mentioning features or use of this software
##    must display the following acknowledgement:
##        This product includes software developed by Henry Kilmer and John
##        Heasley and its contributors for RANCID.
## 4. Neither the name of RANCID nor the names of its
##    contributors may be used to endorse or promote products derived from
##    this software without specific prior written permission.
## 5. It is requested that non-binding fixes and modifications be contributed
##    back to RANCID.
##
## THIS SOFTWARE IS PROVIDED BY Henry Kilmer, John Heasley AND CONTRIBUTORS
## ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
## TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
## PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COMPANY OR CONTRIBUTORS
## BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
## CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
## SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
## INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
## CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
## ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
## POSSIBILITY OF SUCH DAMAGE.
##
## It is the request of the authors, but not a condition of license, that
## parties packaging or redistributing RANCID NOT distribute altered versions
## of the etc/rancid.types.base file nor alter how this file is processed nor
## when in relation to etc/rancid.types.conf.  The goal of this is to help
## suppress our support costs.  If it becomes a problem, this could become a
## condition of license.
# 
#  The expect login scripts were based on Erik Sherk's gwtn, by permission.
# 
#  The original looking glass software was written by Ed Kern, provided by
#  permission and modified beyond recognition.
#
# mrvlogin - MRV login

# Sometimes routers take awhile to answer (the default is 10 sec)
set timeoutdflt 45
# Some CLIs having problems if we write too fast (Extreme, PIX, Cat)
set send_human {.2 .1 .4 .2 1}

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

# 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
if {! [info exists avenable]} {
    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
# Save config, if prompted
set do_saveconfig 0
# cloginrc debugging knob
set do_cloginrcdbg 0
# Sometimes routers take awhile to answer (the default is 10 sec)
if {! [info exists timeoutdflt]} {
    set timeoutdflt 10
}
# intialize cloginrc parsing stacks
set int_file {}
set int_lineno {}

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

# Find the user in the ENV, or use the unix userid.
if {![info exists default_user] && [info exists env(CISCO_USER)]} {
    if {[string length $env(CISCO_USER)]} {
	set default_user $env(CISCO_USER)
    }
}
if {![info exists default_user] && [info exists env(USER)]} {
    if {[string length $env(USER)]} {
	set default_user $env(USER)
    }
}
if {![info exists default_user] && [info exists env(LOGNAME)]} {
    if {[string length $env(LOGNAME)]} {
	set default_user $env(LOGNAME)
    }
}
if (![info exists default_user]) {
    # 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
}
if {[info exists env(CLOGINRC)]} {
    set password_file $env(CLOGINRC)
}

# Process the command line
for {set i 0} {$i < $argc} {incr i} {
    set arg [lindex $argv $i]

    switch  -glob -- $arg {
	# Expect debug mode
	-d* {
	    exp_internal 1
	# Help
	} -h* {
	    send_user "$usage"
	    exit 0
	# Command to run.
	} -c* {
	    if {! [regexp .\[cC\](.+) $arg ignore command]} {
		incr i
		set command [lindex $argv $i]
	    }
	    set do_command 1
	# Enable Password
	} -e* {
	    if {! [regexp .\[e\](.+) $arg ignore enapasswd]} {
		incr i
		set enapasswd [lindex $argv $i]
	    }
	    set do_enapasswd 0
	# Environment variable to pass to -s scripts
	} -E* {
	    if {[regexp .\[E\](.+)=(.+) $arg ignore varname varvalue]} {
		set E$varname $varvalue
	    } else {
		send_user "\nError: invalid format for -E in $arg\n"
		exit 1
	    }
	# alternate cloginrc file
	} -f* {
	    if {! [regexp .\[fF\](.+) $arg ignore password_file]} {
		incr i
		set password_file [lindex $argv $i]
	    }
	# VTY Password
	} -p* {
	    if {! [regexp .\[pP\](.+) $arg ignore userpasswd]} {
		incr i
		set userpasswd [lindex $argv $i]
	    }
	    set do_passwd 0
	# cloginrc debugging knobs
	} -m* {
	    set do_cloginrcdbg 1
	} -M* {
	    set do_cloginrcdbg 2
	# ssh passphrase
	} -r* {
	    if {! [regexp .\[rR\](.+) $arg ignore passphrase]} {
		incr i
		set avpassphrase [lindex $argv $i]
	    }
	# Expect script to run.
	} -s* {
	    if {! [regexp .\[sS\](.+) $arg ignore sfile]} {
		incr i
		set sfile [lindex $argv $i]
	    }
	    if {! [file readable $sfile]} {
		send_user "\nError: Can't read $sfile\n"
		exit 1
	    }
	    set do_script 1
	# save config on exit
	} -S* {
	    # may not be supported by the script and may not be applicable to
	    # the platform
	    set do_saveconfig 1
	# Timeout
	} -t* {
	    if {! [regexp .\[tT\](.+) $arg ignore timeout]} {
		incr i
	        set timeoutdflt [lindex $argv $i]
	    }
	# Username
	} -u* {
	    if {! [regexp .\[uU\](.+) $arg ignore user]} {
		incr i
		set username [lindex $argv $i]
	    }
	# VTY Password
	} -v* {
	    # some scripts ignore -v, like jlogin
	    if {! [regexp .\[vV\](.+) $arg ignore passwd]} {
		incr i
		set passwd [lindex $argv $i]
	    }
	    set do_passwd 0
	# Version string
	} -V* {
	    send_user "rancid 3.7\n"
	    exit 0
	# Enable Username
	} -w* {
	    # may not be supported by the script and may not be applicable to
	    # the platform
	    if {! [regexp .\[wW\](.+) $arg ignore enauser]} {
		incr i
		set enausername [lindex $argv $i]
	    }
	# 'ssh -c' cypher type
	} -y* {
	    if {! [regexp .\[eE\](.+) $arg ignore cypher]} {
		incr i
		set cypher [lindex $argv $i]
	    }
	# Command file
	} -x* {
	    if {! [regexp .\[xX\](.+) $arg ignore cmd_file]} {
		incr i
		set cmd_file [lindex $argv $i]
	    }
	    if [catch {set cmd_fd [open $cmd_file r]} reason] {
		send_user "\nError: $reason\n"
		exit 1
	    }
	    set cmd_text [read $cmd_fd]
	    close $cmd_fd
	    set command [join [split $cmd_text \n] \;]
	    set do_command 1
	# Do we enable?
	} -noenable {
	    set avenable 0
	# Does tacacs automatically enable us?
	} -autoenable {
	    set avautoenable 1
	    set avenable 0
	} -* {
	    send_user "\nError: Unknown argument! $arg\n"
	    send_user $usage
	    exit 1
	} default {
	    break
	}
    }
}
# Process routers...no routers listed is an error.
if {$i == $argc} {
    send_user "\nError: $usage"
}

# Only be quiet if we are running a script (it can log its output
# on its own)
if {$do_script} {
    log_user 0
} else {
    log_user 1
}

#
# Done configuration/variable setting.  Now run with it...
#

# Sets Xterm title if interactive...if its an xterm and the user cares
proc label {host} {
    global env
    # if CLOGIN has an 'x' in it, don't set the xterm name/banner
    if [info exists env(CLOGIN)] {
	if {[string first "x" $env(CLOGIN)] != -1} { return }
    }
    # take host from ENV(TERM)
    if [info exists env(TERM)] {
	if [regexp \^(xterm|vs) $env(TERM) ignore] {
	    send_user "\033]1;[lindex [split $host "."] 0]\a"
	    send_user "\033]2;$host\a"
	}
    }
}

# This is a helper function to make the password file easier to
# maintain.  Using this the password file has the form:
# add password sl*	pete cow
# add password at*	steve
# add password *	hanky-pie
proc add {var args} {
    global int_file int_lineno int_$var
    set file [lindex $int_file 0]
    set lineno [lindex $int_lineno 0]
    lappend int_$var "$var:$file:$lineno: $args"
}
proc include {args} {
    global env
    regsub -all "(^{|}$)" $args {} args
    if {[regexp "^/" $args ignore] == 0} {
	set args $env(HOME)/$args
    }
    source_password_file $args
}

proc find {var router} {
    global do_cloginrcdbg
    upvar int_$var list
    if {[info exists list]} {
	foreach line $list {
	    if {[string match -nocase [lindex $line 1] $router]} {
		if {$do_cloginrcdbg > 0} {
		    send_error -- [join [list [lindex $line 0] [lrange $line 1 end] "\r\n"]]
		}
		if {$do_cloginrcdbg == 2} {
		    # save return value
		    if {! [info exists result]} {
			set result [lrange $line 2 end]
		    }
		} else {
		    return [lrange $line 2 end]
		}
	    }
	}
    }

    if {$do_cloginrcdbg == 2} {
	if {[info exists result]} {
	    return $result
	}
    }
    return {}
}

# Loads the password file.  Note that as this file is tcl, and that
# it is sourced, the user better know what to put in there, as it
# could install more than just password info...  I will assume however,
# that a "bad guy" could just as easy put such code in the clogin
# script, so I will leave .cloginrc as just an extention of that script
proc source_password_file {file} {
    global env int_file int_lineno
    if {! [file exists $file]} {
	send_user "\nError: password file ($file) does not exist\n"
	exit 1
    }
    file stat $file fileinfo
    if {[expr ($fileinfo(mode) & 007)] != 0000} {
	send_user "\nError: $file must not be world readable/writable\n"
	exit 1
    }
    if [catch {set fd [open $file "r"]} reason] {
	send_user "\nError: $reason\n"
	exit 1
    }
    set int_file [linsert $int_file 0 $file]
    set int_lineno [linsert $int_lineno 0 0]
    while {[gets $fd line] >= 0} {
	set tmp [lindex $int_lineno 0]; incr tmp
	lset int_lineno 0 $tmp
	eval $line
    }
    set int_file [lrange $int_file 1 end]
    set int_lineno [lrange $int_lineno 1 end]
    close $fd
}

# Log into the router.
# returns: 0 on success, 1 on failure
proc login { router user userpswd passwd enapasswd cmethod cyphertype } {
    global command spawn_id in_proc do_command do_script
    global prompt u_prompt p_prompt e_prompt sshcmd telnetcmd
    set in_proc 1
    set uprompt_seen 0

    # try each of the connection methods in $cmethod until one is successful
    set progs [llength $cmethod]
    foreach prog [lrange $cmethod 0 end] {
	incr progs -1
	if [string match "telnet*" $prog] {
	    regexp {telnet(:([^[:space:]]+))*} $prog methcmd suffix port
	    if {"$port" == ""} {
		set retval [ catch {eval spawn [split "$telnetcmd $router"]} reason ]
	    } else {
		set retval [ catch {eval spawn [split "$telnetcmd $router $port"]} reason ]
	    }
	    if { $retval } {
		send_user "\nError: telnet failed: $reason\n"
		return 1
	    }
	} elseif [string match "ssh*" $prog] {
	    regexp {ssh(:([^[:space:]]+))*} $prog methcmd suffix port
	    set cmd $sshcmd
	    if {"$port" != ""} {
		set cmd "$cmd -p $port"
	    }
	    if {"$cyphertype" != ""} {
		set cmd "$cmd -c $cyphertype"
	    }
	    set retval [ catch {eval spawn [split "$cmd -x -l $user $router" { }]} reason ]
	    if { $retval } {
		send_user "\nError: $sshcmd failed: $reason\n"
		return 1
	    }
	} else {
	    send_user "\nError: unknown connection method: $prog\n"
	    return 1
	}
	sleep 0.3

	# This helps cleanup each expect clause.
	expect_after {
	    timeout {
		global in_proc
		send_user "\nError: TIMEOUT reached\n"
		catch {close}; catch {wait};
		if {$in_proc} {
		    return 1
		} else {
		    continue
		}
	    } eof {
		global in_proc
		send_user "\nError: EOF received\n"
		catch {close}; catch {wait};
		if {$in_proc} {
		    return 1
		} else {
		    continue
		}
	    }
	}

    # Here we get a little tricky.  There are several possibilities:
    # the router can ask for a username and passwd and then
    # talk to the TACACS server to authenticate you, or if the
    # TACACS server is not working, then it will use the enable
    # passwd.  Or, the router might not have TACACS turned on,
    # then it will just send the passwd.
    # if telnet fails with connection refused, try ssh
    expect {
	-re "(Connection refused|Secure connection \[^\n\r]+ refused)" {
	    catch {close}; catch {wait};
	    if !$progs {
		send_user "\nError: Connection Refused ($prog): $router\n"
		return 1
	    }
	}
	-re "(Connection closed by|Connection to \[^\n\r]+ closed)" {
	    catch {close}; catch {wait};
	    if !$progs {
		send_user "\nError: Connection closed ($prog): $router\n"
		return 1
	    }
	}
	eof { send_user "\nError: Couldn't login: $router\n"; wait; return 1 }
	-nocase "unknown host\r" {
	    send_user "\nError: Unknown host $router\n";
	    catch {close}; catch {wait};
	    return 1
	}
	"Host is unreachable" {
	    send_user "\nError: Host Unreachable: $router\n";
	    catch {close}; catch {wait};
	    return 1
	}
	"No address associated with name" {
	    send_user "\nError: Unknown host $router\n";
	    catch {close}; catch {wait};
	    return 1
	}
	-re "(Host key not found |The authenticity of host .* be established)" {
	    expect {
		-re "\\(yes\/no\\)\\?"	{ send "yes\r";
					  send_user "\nHost $router added to the list of known hosts.\n"
					 }
		-re "\[^\r\n]*\[\r\n]+"	{ exp_continue; }
	    }
	    exp_continue
	}
	-re "HOST IDENTIFICATION HAS CHANGED" {
	    send_user "\nError: The host key for $router has changed.  Update the SSH known_hosts file accordingly.\n"
	    expect {
		-re "\\(yes\/no\\)\\?"	{ send "no\r" }
		-re " strict checking\.\[\r\n]+" { }
		-re "\[^\r\n]*\[\r\n]+"	{ exp_continue; }
	    }
	    catch {close}; catch {wait};
	    return 1
	}
	-re "Offending key for " {
	    send_user "\nError: host key mismatch for $router.  Update the SSH known_hosts file accordingly.\n"
	    expect {
		-re "\\(yes\/no\\)\\?"	{ send "no\r" }
		-re "\[^\r\n]*\[\r\n]+"	{ exp_continue; }
	    }
	    catch {close}; catch {wait};
	    return 1
	}
	-nocase -re "^warning: remote host denied authentication agent forwarding." {
	    exp_continue;
	}
	-re "(denied|Sorry)"	{
				  send_user "\nError: Check your passwd for $router\n"
				  catch {close}; catch {wait}; return 1
				}
	-re "Login (failed|incorrect)" {
				  send_user "\nError: Check your passwd for $router\n"
				  catch {close}; catch {wait}; return 1
				}
	-re "% (Bad passwords|Authentication failed)"	{
				  send_user "\nError: Check your passwd for $router\n"
				  catch {close}; catch {wait}; return 1
				}
	"Press any key to continue" {
				  # send_user "Pressing the ANY key\n"
				  send "\r"
				  exp_continue
				}
	-re "Enter Selection: " {
				  # Catalyst 1900s have some lame menu.  Enter
				  # K to reach a command-line.
				  send "K\r"
				  exp_continue
				}
	-re "Last login:"	{
				  exp_continue
				}
	-re "@\[^\r\n]+ $p_prompt"	{
				  # ssh pwd prompt
				  sleep 1
				  send -h -- "$userpswd\r"
				  exp_continue
				}
	-re "$u_prompt"		{
				  send -h -- "$user\r"
				  set uprompt_seen 1
				  exp_continue
				}
	-re "$p_prompt"		{
				  sleep 1
				  if {$uprompt_seen == 1} {
					send -h -- "$userpswd\r"
				  } else {
					send -h -- "$passwd\r"
				  }
				  exp_continue
				}
	-re "$prompt"		{ break; }
	"Login invalid"		{
				  send_user "\nError: Invalid login: $router\n";
				  catch {close}; catch {wait}; return 1
				}
	-re "\[^\r\n]\[\r\n]+"	{ exp_continue }
     }
    }

    set in_proc 0
    return 0
}

# Enable
proc do_enable { enauser enapasswd } {
    global prompt in_proc
    global u_prompt e_prompt
    set in_proc 1

    send -h "enable\r"
    expect {
	-re "$u_prompt"	{ send -h -- "$enauser\r"; exp_continue}
	-re "$e_prompt"	{ send -h -- "$enapasswd\r"; exp_continue}
	"#"		{ set prompt "#" }
	-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
}

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

    # match cisco config mode prompts too, such as router(config-if)#
    regsub -lineanchor -- {^(.{1,11}).*([#>] *)$} $prompt {\1} reprompt
    # escape any parens or escapes in the prompt
    regsub -all -- {[)(\\]$} $reprompt {} reprompt
    append reprompt {([^#>\r\n]+)?[#>]}

    # this is the only way i see to get rid of more prompts in o/p..grrrrr
    log_user 0

    # handle escaped ;s in commands, and ;; and ^;
    regsub -all {([^\\]);;} $command "\\1;\u002;" esccommand
    regsub {^;} $esccommand "\u002;" command
    set sep "\\1\u001"
    regsub -all {([^\\])\;} $command "$sep" esccommand
    set sep "\u001"
    set commands [split $esccommand $sep]
    set num_commands [llength $commands]
    # the pager can not be turned off on the PIX, so we have to look
    # for the "More" prompt.  the extreme is equally obnoxious, with a
    # global switch in the config.
    # XXX I think the pager can be turned off and this is just an artifact of
    #	  clogin
    for {set i 0} {$i < $num_commands} { incr i} {
	send -h -- "[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 "^--More--\[\r\n]+"		{ # specific match c1900 pager
						  send " "
						  exp_continue }
	    -re "\[\n\r]+"			{ send_user -- "$expect_out(buffer)"
						  exp_continue }
	    -re "\[^\r\n]*Press <SPACE> to cont\[^\r\n]*"	{
						  send " "
						  # bloody ^[[2K after " "
						  expect {
							-re "^\[^\r\n]*\r" {}
							}
						  exp_continue
						}
	    -re "^ *--More--\[^\n\r]*"		{
						  send " "
						  exp_continue }
	    -re "^<-+ More -+>\[^\n\r]*"	{
						  send_user -- "$expect_out(buffer)"
						  send " "
						  exp_continue }
	}
    }
    log_user 1

    send -h "exit\r"
    expect {
	-re "^\[^\n\r *]*$reprompt"		{
						  # the Cisco CE and Jnx ERX
						  # return to non-enabled mode
						  # on exit in enabled mode.
						  send -h "exit\r"
						  exp_continue;
						}
	"Would you like to save them now"	{ # Force10
						  send "n\r"
						  exp_continue
						}
	"Configuration changes have occurred.*"	{ # Cisco CSS
						  send "n\r"
						  exp_continue
						}
	"Do you wish to save your configuration changes" {
						  send "n\r"
						  exp_continue
						}
	-re "\[\n\r]+"				{ exp_continue }
	timeout					{ catch {close}; catch {wait};
						  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
set exitval 0
foreach router [lrange $argv $i end] {
    set router [string tolower $router]
    send_user -- "$router\n"

    # device timeout
    set timeout [find timeout $router]
    if { [llength $timeout] == 0 } {
	set timeout $timeoutdflt
    }

    # Figure out the prompt.
    # 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 "#\[^\[:digit:]]"
    } else {
	set ae [find autoenable $router]
	if { "$ae" == "1" } {
	    set autoenable 1
	    set enable 0
	    set prompt "#\[^\[:digit:]]"
	} else {
	    set autoenable 0
	    set enable $avenable
	    set prompt ">"
	}
    }

    # look for noenable option in .cloginrc
    if { [find noenable $router] == "1" } {
	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] < 2 } {
	send_user -- "\nError: no enable password for $router in $password_file.\n"
	continue
      }
      set passwd [join [lindex $pswd 0] ""]
      set enapasswd [join [lindex $pswd 1] ""]
    } else {
	set passwd $userpasswd
	set enapasswd $enapasswd
    }

    # Figure out username
    if {[info exists username]} {
      # command line username
      set ruser $username
    } else {
      set ruser [join [find user $router] ""]
      if { "$ruser" == "" } { set ruser $default_user }
    }

    # Figure out username's password (if different from the vty password)
    if {[info exists userpasswd]} {
      # command line username
      set userpswd $userpasswd
    } else {
      set userpswd [join [find userpassword $router] ""]
      if { "$userpswd" == "" } { set userpswd $passwd }
    }

    # Figure out enable username
    if {[info exists enausername]} {
      # command line enausername
      set enauser $enausername
    } else {
      set enauser [join [find enauser $router] ""]
      if { "$enauser" == "" } { set enauser $ruser }
    }

    # Figure out prompts
    set u_prompt [find userprompt $router]
    if { "$u_prompt" == "" } {
	set u_prompt "(Username|Login|login|user name):"
    } else {
	set u_prompt [join [lindex $u_prompt 0] ""]
    }
    set p_prompt [find passprompt $router]
    if { "$p_prompt" == "" } {
	set p_prompt "(\[Pp]assword|passwd):"
    } else {
	set p_prompt [join [lindex $p_prompt 0] ""]
    }
    set e_prompt [find enableprompt $router]
    if { "$e_prompt" == "" } {
	set e_prompt "\[Pp]assword:"
    } else {
	set e_prompt [join [lindex $e_prompt 0] ""]
    }

    # Figure out cypher type
    if {[info exists cypher]} {
        # command line cypher type
        set cyphertype $cypher
    } else {
        set cyphertype [find cyphertype $router]
    }

    # Figure out connection method
    set cmethod [find method $router]
    if { "$cmethod" == "" } { set cmethod {{telnet} {ssh}} }

    # Figure out the SSH executable name
    set sshcmd [join [lindex [find sshcmd $router] 0] ""]
    if { "$sshcmd" == "" } { set sshcmd {ssh} }

    # Figure out the telnet executable name
    set telnetcmd [join [lindex [find telnetcmd $router] 0] ""]
    if { "$telnetcmd" == "" } { set telnetcmd "telnet -K" }

    # if [-mM], skip do not login
    if { $do_cloginrcdbg > 0 } { continue; }

    # Login to the router
    if {[login $router $ruser $userpswd $passwd $enapasswd $cmethod $cyphertype]} {
	incr exitval
	# if login failed, move on to the next device
	continue
    }
    if { $enable } {
	if {[do_enable $enauser $enapasswd]} {
	    if { $do_command || $do_script } {
		incr exitval
		catch {close}; catch {wait};
		continue
	    }
	}
    }
    # we are logged in, now figure out the full prompt
    send "\r"
    expect {
	-re "\[\r\n]+"		{ exp_continue; }
	-re "^.+$prompt"	{ set junk $expect_out(0,string);
				  regsub -all "\[\]\[]" $junk {\\&} prompt;
				}
    }

    if { $do_command || $do_script } {
	send -h "terminal length 0\r"
	expect -re $prompt	{}
	send -h "terminal width 200\r"
	expect -re $prompt	{}
	send -h "no cli-paging\r"
	expect -re $prompt	{}
    }
    if { $do_command } {
	if {[run_commands $prompt $command]} {
	    incr exitval
	    continue
	}
    } elseif { $do_script } {
	source $sfile
	catch {close};
    } else {
	label $router
	log_user 1
	interact
    }

    # End of for each router
    catch {wait};
    sleep 0.3
}
exit $exitval