#!/bin/bash

# This script checks the running processes of a remote host by SSH
# You have to add the public-Key of the user running this script (usually nagios)
# to the remote authorized_keys of the user on the remote system.
# This script only needs the privilege to run "ps -e -o cmd" on the remote system

# This script is released under the terms of the GPL

# Have fun, everyone, neuhaus@dodekatex.de


usage="Usage: check_process_by_ssh -H Host -k SSH_public_keyfile -u SSH_user [-p SSH_port] service1 [service2 service3 ...]"
sshport="22"

sshhostname=""
sshkeyfile=""
sshuser=""

process=()

while getopts "H:p:k:u:" opt; do
	case $opt in
		H ) sshhostname=$OPTARG ;;
		p ) sshport=$OPTARG ;;
		k ) sshkeyfile=$OPTARG;;
		u ) sshuser=$OPTARG;;
		\? ) echo $usage
			exit 1;;
	esac
done

shift $(($OPTIND - 1))


if [ -z "$1" ] || [ -z "$sshhostname" ] || [ -z "$sshkeyfile" ] || [ -z "$sshuser" ]; then
	echo $usage
	exit 1
fi

# Now, everything's fine with the arguments. Let's start to work

process=$(ssh -l $sshuser -p $sshport -i $sshkeyfile $sshhostname ps -e -o cmd) 

while [ ! -z "$1" ] ; do
	tempok="false"
	for i in $process ; do
		if echo $i | grep -s $1 2> /dev/null > /dev/null ; then
			tempok="true"
			ok="${ok} $1"
			break
		fi	
	done	
	if [ $tempok = false ] ; then
		error="${error} $1"
	fi
	shift
done

if [ -z $error ] ; then
	echo "$ok running"
	exit 0
else
	echo "$error missing"
	exit 2
fi