ssh.expect

#!/usr/bin/expect

log_user 0
stty -echo

fconfigure stdin -blocking 1
gets stdin pass
fconfigure stdin -blocking 0


#capturar redimension de tamaño de pantalla y pasarlo al proceso ssh hijo
trap { 
 set rows [stty rows]
 set cols [stty columns]
 stty rows $rows columns $cols < $spawn_out(slave,name)
} WINCH


set connection [ lindex $argv 0 ]

set i 0
foreach {arg} $argv { 
   set i [ expr $i+1 ]; 
   if {$arg=="-l"} {
      set user [ lindex $argv $i ]
   }
}

if { $connection == "telnet" } {
    set timeout 20
    set cmd "/usr/bin/telnet"
    set reg "assword:"
} else {
    set timeout -1
    set cmd "/usr/bin/ssh"
    set reg "assword:"
}


eval spawn $cmd [ lrange $argv 1 [expr {$argc - 1}] ]   

expect {
          -re "login:|sername:" { send "$user\r"; exp_continue; }
          $reg { send "$pass\r"; exec kill -WINCH [ pid ]; interact; }
          "Are you sure you want to continue connecting (yes/no)?" { send "yes\r"; exp_continue; }	 
          "Host key verification failed." { puts $expect_out(buffer);  exit; }
          timeout { interact; }          
       }

log_user 1

set ret [exp_wait]
set status [lindex $ret 3]
exit $status