Add an ignored service list to checkservices to avoid useless parsing…

… errors

This commit aims to introduce an ignored service list that can be completed with every service known to create parsing errors
Fixes #44

admin/checkservices

@@ -55,6 +55,9 @@ SERIALIZE=0         # run in parallel
 STATUS=1            # display status after systemctl
 USER_SLICE=0        # act on users services
 
+# ignored service list
+IGNORED_SERVICE=("getty@tty.*.service")
+
 # print $* as an arrow line
 arrow() {
     printf "${C_BOLD}${C_BLUE}:: ${C_WHITE}%s${C_RESET}\n" "$*"
@@ -102,7 +105,7 @@ confirm() {
 
 # get running systemd services
 get_services() {
-    systemctl --no-legend --full --type service --state running | tr -d '●' | awk '{print $1}'
+    systemctl --no-legend --full --type service --state running | tr -d '●' | awk '{print $1}' | grep -v $(printf -- '-e %s ' "${IGNORED_SERVICE[@]}")
 }
 
 # get systemd services with updated mapped files