getter handling with own domain

core/printOwnDomain.sh

@@ -0,0 +1,28 @@
+#!/bin/bash
+
+#WARNING: Used for core functionality in setup.sh
+#         DO NOT rename the script and test changes well!
+
+
+
+# Folders always ends with an tailing '/'
+_SCRIPT="$(readlink -f "${0}" 2> /dev/null)"
+_CORE_SCRIPTS="$(dirname ${_SCRIPT:?"Missing SCRIPT"} 2> /dev/null)/"
+_CIS_ROOT="$(dirname ${_CORE_SCRIPTS:?"Missing CORE_SCRIPTS"} 2> /dev/null)/"
+_OVERRIDE_DOMAIN_FILE="${_CIS_ROOT:?"Missing CIS_ROOT"}overrideOwnDomain"
+
+# Wenn OVERRIDING_DOMAIN_FILE enhält lesbare Daten
+grep '[^[:space:]]' "${_OVERRIDE_DOMAIN_FILE:?"Missing OVERRIDE_DOMAIN_FILE"}" &> /dev/null \
+    && echo "WARNING: Domain has been overridden by: ${_OVERRIDE_DOMAIN_FILE}" > /dev/stderr \
+    && cat "${_OVERRIDE_DOMAIN_FILE}" \
+    && exit 0
+
+_BOOT_HOSTNAME="$(hostname -b)"
+# There has to be one dot at least.
+echo "${_BOOT_HOSTNAME}" | grep -v '\.' &> /dev/null \
+    && echo "It was impossible to find out the domain of this host, please prepare this host first." > /dev/stderr \
+    && exit 1
+
+#Removes shortest matching pattern '*.' from the begin to get the domain
+echo "${_BOOT_HOSTNAME#*.}" \
+    && exit 0