tdb_firstkey(3) on Linux
The text 0e226f3a7372, as Debian 12 (Bookworm), Debian 11 (Bullseye), Debian 10 (Buster), Debian 9 (Stretch), Debian 8 (Jessie), Debian 7 (Wheezy), Debian 6.0 (Squeeze), Debian 5.0 (Lenny) shipped it.
return the key of the first record in a tdb database tdb_nextkey - return the key of next record in the tdb database