In #25 we added support for persistent genid, but got the path wrong.
On Linux based systems we should honor the FHS:
"An application (or a group of inter-related applications) must use a subdirectory of /var/lib for its data.
There is one > required subdirectory, /var/lib/misc, which is intended for state files that don't need a subdirectory; ..."
On UNIX systems we should use /var/db.
Hence, _PATH_VARDB in /usr/include/paths.h really is the one to rely on here. Except some C-libraries on Linux still use /var/db, and the system is not guaranteed to have that path, or even a symlink to /var/lib/misc. So, we can either guess/probe on the system or make this a configure option, because some users don't even want to follow the FHS or a traditional hier(7).
In #25 we added support for persistent genid, but got the path wrong.
On Linux based systems we should honor the FHS:
On UNIX systems we should use
/var/db.Hence,
_PATH_VARDBin/usr/include/paths.hreally is the one to rely on here. Except some C-libraries on Linux still use/var/db, and the system is not guaranteed to have that path, or even a symlink to/var/lib/misc. So, we can either guess/probe on the system or make this a configure option, because some users don't even want to follow the FHS or a traditional hier(7).