[ceph-fs] running cephfs-shell without installing

I need to do a bit of testing with cephfs and would like to avoid having to use FUSE or write C calls into libcephfs. cephfs-shell seems perfect for this, but I haven't quite figured out how to run it out of the build directory. Is there a way to run cephfs-shell from a ceph build directory (i.e. w/o make installing it)? Are there env vars that can be set to make it find the right bits in the right places? Thanks, -- Jeff Layton <jlayton(a)redhat.com>