replace telnet with /dev/tcp check #8

Author: mviereck

README.md

@@ -57,7 +57,7 @@ Installation in general:
    ```
 
 ### Installation in Cygwin
- - Run the Cygwin installer and install packages `xinit`, `xauth`, `wget` and `inetutils`.
+ - Run the Cygwin installer and install packages `xinit`, `xauth` and `wget`.
  - In Cygwin terminal run the commands:
    ```
    wget https://raw.githubusercontent.com/mviereck/runx/master/runx -O /usr/local/bin/runx

runx

@@ -1,7 +1,7 @@
 #! /bin/bash
 # runx: Provide an X server in Cygwin, MSYS2 or WSL.
 
-Version="v0.4.6"
+Version="v0.4.8"
 
 usage() {                       # Usage information (--help)
   echo "runx - Run Linux GUI applications on MS Windows.
@@ -280,7 +280,7 @@ check_display() {               # Find unused display number
   return 1
 }
 check_displayport() {           # Return 0 if display number $1 is in use
-  echo "quit" | env LC_ALL=C telnet "$Hostip" "$((6000+${1:-}))" 2>&1 | grep -q "Connected"
+  </dev/tcp/"$Hostip"/$((6000+${1:-})) >/dev/null 2>&1
 }
 check_host() {                  # Check host environment