Fix : binary operator expected and don't use a not not operator

functions/fn_messages

@@ -8,7 +8,7 @@
 
 # Date and servicename for log files.
 fn_scriptlog(){
-    if [ ! -z ${modulename} ]; then
+    if [[ -n ${modulename} ]]; then
         echo -e "$(date '+%b %d %H:%M:%S') ${servicename}: ${modulename}: ${1}" >> "${scriptlog}"
     else
         echo -e "$(date '+%b %d %H:%M:%S') ${servicename}: ${1}" >> "${scriptlog}"
@@ -17,7 +17,7 @@ fn_scriptlog(){
 
 # [ FAIL ]
 fn_printfail(){
-    if [ ! -z ${modulename} ]; then
+    if [[ -n ${modulename} ]]; then
         echo -en "\r\033[K[\e[0;31m FAIL \e[0m] ${modulename} ${servicename}: $@"
     else
         echo -en "\r\033[K[\e[0;31m FAIL \e[0m] $@"
@@ -25,7 +25,7 @@ fn_printfail(){
 }
 
 fn_printfailnl(){
-    if [ ! -z ${modulename} ]; then
+    if [[ -n ${modulename} ]]; then
         echo -e "\r\033[K[\e[0;31m FAIL \e[0m] ${modulename} ${servicename}: $@"
     else
         echo -e "\r\033[K[\e[0;31m FAIL \e[0m] $@"
@@ -34,7 +34,7 @@ fn_printfailnl(){
 
 # [  OK  ]
 fn_printok(){
-    if [ ! -z ${modulename} ]; then
+    if [[ -n ${modulename} ]]; then
         echo -en "\r\033[K[\e[0;32m  OK  \e[0m] ${modulename} ${servicename}: $@"
     else
         echo -en "\r\033[K[\e[0;32m  OK  \e[0m] $@"
@@ -42,7 +42,7 @@ fn_printok(){
 }
 
 fn_printoknl(){
-    if [ ! -z ${modulename} ]; then
+    if [[ -n ${modulename} ]]; then
         echo -e "\r\033[K[\e[0;32m  OK  \e[0m] ${modulename} ${servicename}: $@"
     else
         echo -e "\r\033[K[\e[0;32m  OK  \e[0m] $@"
@@ -51,7 +51,7 @@ fn_printoknl(){
 
 # [ INFO ]
 fn_printinfo(){
-    if [ ! -z ${modulename} ]; then
+    if [[ -n ${modulename} ]]; then
         echo -en "\r\033[K[\e[0;36m INFO \e[0m] ${modulename} ${servicename}: $@"
     else
         echo -en "\r\033[K[\e[0;36m INFO \e[0m] $@"
@@ -59,7 +59,7 @@ fn_printinfo(){
 }
 
 fn_printinfonl(){
-    if [ ! -z ${modulename} ]; then
+    if [[ -n ${modulename} ]]; then
         echo -e "\r\033[K[\e[0;36m INFO \e[0m] ${modulename} ${servicename}: $@"
     else
         echo -e "\r\033[K[\e[0;36m INFO \e[0m] $@"
@@ -68,7 +68,7 @@ fn_printinfonl(){
 
 # [ WARN ]
 fn_printwarn(){
-    if [ ! -z ${modulename} ]; then
+    if [[ -n ${modulename} ]]; then
         echo -en "\r\033[K[\e[1;33m WARN \e[0m] ${modulename} ${servicename}: $@"
     else
         echo -en "\r\033[K[\e[1;33m WARN \e[0m] $@"
@@ -76,7 +76,7 @@ fn_printwarn(){
 }
 
 fn_printwarnnl(){
-    if [ ! -z ${modulename} ]; then
+    if [[ -n ${modulename} ]]; then
         echo -e "\r\033[K[\e[1;33m WARN \e[0m] ${modulename} ${servicename}: $@"
     else
         echo -e "\r\033[K[\e[1;33m WARN \e[0m] $@"
@@ -85,7 +85,7 @@ fn_printwarnnl(){
 
 # [ .... ]
 fn_printdots(){
-    if [ ! -z ${modulename} ]; then
+    if [[ -n ${modulename} ]]; then
         echo -en "\r\033[K[ .... ] ${modulename} ${servicename}: $@"
     else
         echo -en "\r\033[K[ .... ] $@"
@@ -126,4 +126,4 @@ fn_printerror(){
 
 fn_printerrornl(){
     echo -e "\e[0;31mError!\e[0m $@"
-}
+}