baytech-mgmt-monitor.exp

#!/usr/bin/expect -f

# expect script to login to a baytech management module and control power
# to one of its outlets

# gather command line arguments into variables
set host [lrange $argv 0 0]   
set user [lrange $argv 1 1] 
set password [lrange $argv 2 2] 

# complain if we don't get exactly 5 arguments
if {$argc!=3} {
	send_user "Usage: baytech.exp <host> <user> <password>\n"
	exit 1
}

# use a 15 second timeout
set timeout 15

# this disables showing interaction on stdout.  It should be commented
# if you are trying to debug this script and want to see what it is doing
log_user 0

# delete old log file and start a new one
#system rm -f /tmp/expect.log
#log_file -a /tmp/expect.log

# open ssh connection.  Turn off strict host checking so ssh doesn't ask us 
# if it is ok to connect to this hostname
spawn ssh "-oStrictHostKeyChecking no" $user@$host 

# Look for passwod prompt
expect {
	"*?assword:*" {}
	default {
		# password prompt never showed up
		send_user "failed to ssh to host $host\n"
		exit 1
	}
}

# Send password aka $password 
send -- "$password\r"
# look for top level prompt
expect {
	"*Enter Request*" {}
	default {
		# our user name and password did not work
		send_user "Error: host $host failed to accept username and password\n"
		exit 1
	}
}

# send logout command
send -- "T\r"

close
wait