[TASK] Add list mode

host-manager

@@ -2,10 +2,11 @@
 # Idea and interface taken from https://github.com/macmade/host-manager
 
 path="/etc/hosts"
-addusage="Usage: `basename $0` -add host address"
-remusage="Usage: `basename $0` -remove host"
+addusage="Usage: `basename $0` --add host address"
+remusage="Usage: `basename $0` --remove host"
+listusage="Usage: `basename $0` --list [127.]"
 case "$1" in
--add)
+--add)
   if [ $# -eq 3 ]; then
     if [[ -n $(grep "^$3.*[^A-Za-z0-9\.]$2$" ${path}) ]]; then
       echo "Duplicate address/host combination, ${path} unchanged."
@@ -16,14 +17,22 @@ case "$1" in
     echo $addusage;
   fi 
   ;;
--remove)
+--remove)
   if [ $# -eq 2 ]; then
-    sed -i '' -e "s/^[^#].*[^A-Za-z0-9\.]$2$//g" -e "/^$/ d" ${path}
+    sed -i '' "s/^[^#].*[^A-Za-z0-9\.]$2$//g;/^$/d" ${path}
   else
     echo $remusage;
   fi 
   ;;
+--list)
+  if [ $# -eq 2 ]; then
+    grep "^$2" ${path}
+  else 
+	cat ${path} | grep -v "^#"
+  fi 
+  ;;
 *)
   echo $addusage;
   echo $remusage;
-esac
+  echo $listusage;
+esac