54 lines
1.8 KiB
Markdown
54 lines
1.8 KiB
Markdown
# Data for Freifunk Map, Graph and Node List
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ffmap-backend gathers information on the batman network by invoking
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batctl
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and
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batadv-vis
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as root (via sudo) and has this information placed into a target directory
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as the file "nodes.json" and also updates the directory "nodes" with graphical
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representations of uptimes and the number of clients connecting.
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The target directory is suggested to host all information for interpreting those
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node descriptions, e.g. as provided by https://github.com/ffnord/ffmap-d3.git .
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When executed without root privileges, we suggest to grant sudo permissions
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within wrappers of those binaries, so no further changes are required in other
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scripts:
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<pre>
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$ cat <<EOCAT > $HOME/batctl
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#!/bin/sh
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exec sudo /usr/sbin/batctl $*
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EOCAT
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</pre>
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and analogously for batadv-vis. The entry for /etc/sudoers could be
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whateveruser ALL=(ALL:ALL) NOPASSWD: /usr/sbin/batctl,/usr/sbin/batadv-vis,/usr/sbin/alfred-json
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The destination directory can be made directly available through apache:
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<pre>
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$ cat /etc/apache2/site-enabled/000-default
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...
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<Directory /home/whateverusername/www/>
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Options Indexes FollowSymLinks MultiViews
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AllowOverride None
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Order allow,deny
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allow from all
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</Directory>
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...
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$ cat /etc/apache2/conf.d/freifunk
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Alias /map /home/ffmap/www/
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Alias /firmware /home/freifunk/autoupdates/
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</pre>
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To execute, run
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./mkmap.sh ../www
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The script expects above described sudo-wrappers in the $HOME directory of the user executing
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the script. If those are not available, an error will occurr if not executed as root. Also,
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the tool realpath optionally allows to execute the script from anywhere in the directory tree.
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For the script's regular execution add the following to the crontab:
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<pre>
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*/5 * * * * /home/ffmap/ffmap-backend/mkmap.sh /home/ffmap/www
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</pre>
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