lsof | grep gnupg

[root@chris pacman.d]# lsof | grep gnupg
lsof: WARNING: can't stat() fuse.gvfsd-fuse file system /run/user/1000/gvfs
      Output information may be incomplete.
dirmngr    541         root    4u     unix 0xffff88007322d500      0t0      10799 /root/.gnupg/S.dirmngr type=STREAM
ldap-reap  541  542    root    4u     unix 0xffff88007322d500      0t0      10799 /root/.gnupg/S.dirmngr type=STREAM