#!/bin/bash

# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# author: Micheal Garner (michael.garner@v<SNIP>.com)
# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

# usage function to describe script.
usage() {
    cat <<EOM
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    Usage:
$(basename $0) is for running show commands on a list of hosts using ssh.

It requires 2 inputs:

      1) your hosts file (default=hosts.txt)
      2) your commands file (default=commands.txt)

It will generate a output per host (hostname{datestamp}.txt)

Please provide the requred inputs;

./show2many.sh hosts.txt commands.txt

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
~~~~~~~~~~  Written by Micheal Garner (michael.garner@<SNIP>.com)  ~~~~~~~~~~
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
EOM
    exit 0
}

# if less than two arguments supplied, display usage
	if [  $# -le 1 ]
	then
		usage
		exit 1
	fi

# check whether user had supplied -h or --help . If yes display usage
 if [[ ( $# == "--help") ||  $# == "-h" ]]
 	then
 		usage
 		exit 0
 	fi

# Define a timestamp as a function (not used yet)
timestamp() {
  date +"%T"
}
# Define a date variable called now
now=`date '+%H-%M-%S_%d-%m-%Y'`;
# Define a time variable called time
time=`date '+%H:%M:%S'`;
# take first argument ($1) and add to hostfile variable
hostfile=$1

# take second argument and add to commandfile variable
commandfile=$2
# a for loop using hostfile variable
for host in $(cat $hostfile)
do
  for command in "$(cat ${commandfile[@]})"
  do
  echo -e "connecting to $host at $time and running the following commands:${command}"
  ssh $host "$command" >> $host$now.txt
done
done