README: drop sudo explanation

README.md

@@ -2,33 +2,21 @@
 
 [![Build Status](https://travis-ci.org/ffnord/ffmap-backend.svg?branch=master)](https://travis-ci.org/ffnord/ffmap-backend)
 
-ffmap-backend gathers information on the batman network by invoking 
+ffmap-backend gathers information on the batman network by invoking :
 
- * batctl,
+ * batctl (might require root),
  * alfred-json and
  * batadv-vis
 
-as root (via sudo) and has this information placed into a target directory
+In order to use alfred-json and batadv-vis make sure the user running this
-as the file "nodes.json" and also updates the directory "nodes" with graphical
+backend is allowed to access alfred's socket.
-representations of uptimes and the number of clients connecting.
+
+The output will be written to a directory (`-d output`).
 
 Run `backend.py --help` for a quick overview of all available options.
 
-When executed without root privileges, we suggest to grant sudo permissions
-within wrappers of those binaries, so no further changes are required in other
-scripts:
-
-<pre>
-$ cat <<EOCAT > $HOME/batctl
-#!/bin/sh
-exec sudo /usr/sbin/batctl $*
-EOCAT
-</pre>
-
-and analogously for batadv-vis. The entry for /etc/sudoers could be
-whateveruser   ALL=(ALL:ALL) NOPASSWD: /usr/sbin/batctl,/usr/sbin/batadv-vis,/usr/sbin/alfred-json
-
 For the script's regular execution add the following to the crontab:
+
 <pre>
 * * * * * /path/to/ffmap-backend/backend.py -d /path/to/output -a /path/to/aliases.json --vpn ae:7f:58:7d:6c:2a --vpn d2:d0:93:63:f7:da
 </pre>