check pipes in output and performance data

README.md

+```text
+ _______        __
+|_     _|.----.|__|.-----.-----.---.-.
+ _|   |_ |  __||  ||     |  _  |  _  |
+|_______||____||__||__|__|___  |___._|
+                         |_____|
+ ______                     __                   ______ _____   __               __
+|   __ \.---.-.-----.-----.|__|.--.--.-----.    |      |     |_|__|.-----.-----.|  |_
+|    __/|  _  |__ --|__ --||  ||  |  |  -__|    |   ---|       |  ||  -__|     ||   _|
+|___|   |___._|_____|_____||__| \___/|_____|    |______|_______|__||_____|__|__||____|
+```
+
+A set of shell scripts (Bash) for an icinga client.
+With a director script you can create Hosts and service checks with Icingaweb2 director API.
+With an Icinga2 script you can run checks and post its results to the Icinga2 API.
+
+Licencse: GNU GPL 3.0
+
+IML * Institute For Medical Education; University of Bern
+
+## Requirements
+
+Icinga:
+
+* In Icingaweb2 the module "director" must be enabled and the API access to it
+* An existing Icinga 2 instance with enabled API access
+
+On clients:
+
+* Linux with Bash
+
+## Basic Installation
+
+As root...
+
+* Create a non privileged user "icingaclient".
+* Create a directory `mkdir -p /opt/imlmonitor/ && cd /opt/imlmonitor/`
+* Run a git clone: `git clone https://git-repo.iml.unibe.ch/open-source/icinga-passive-client.git client`
+* Set owner: `chown -R icingaclient. client`
+
+## Setup client
+
+* go to the "client" directory `cd /opt/imlmonitor/client` and copy _etc directory to /etc: `cp -r _etc /etc/icingaclient`
+
+## Setup Icingaweb2 director access
+
+TBD
+
+## Setup Icinga2 access
+
+TBD