For a diploma thesis, I am developing a Linux daemon that runs on Debian and is also Debian-packaged for easy administration. It reads various measurement results via I²C. The results shall be shown on a website.
In Debian, where in the filesystem would a daemon output such measurement data to be updated regularly and read from other applications or the user? To clearify, logging is done seperately, I would just have a few files containing the current values (just like you can read the CPU temperature in /proc).
From the FHS, these seem to be most fitting:
/var/libor/var/spool/srv/tmp
Where should it go?
/varis structure for variable file. So keep it in/var/lib/you_application/