ffmap-backend - Data for Freifunk Map

ffmap-backend gathers information on the batman network by invoking batctl and batadv-vis as root (via sudo) and has this information placed into a target directory as the file "nodes.json" and also updates the directory "nodes" with graphical representations of uptimes and the number of clients connecting.

The target directory is suggested to host all information for interpreting those node descriptions, e.g. as provided by https://github.com/ffnord/ffmap-d3.git . 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:

$ cat < $HOME/batctl #!/bin/sh exec sudo /usr/sbin/batctl $* EOCAT

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

The destination directory can be made directly available through apache:

$ cat /etc/apache2/site-enabled/000-default ... <Directory /home/whateverusername/www/> Options Indexes FollowSymLinks MultiViews AllowOverride None Order allow,deny allow from all ...

$ cat /etc/apache2/conf.d/freifunk Alias /map /home/ffmap/www/ Alias /firmware /home/freifunk/autoupdates/