scf_scope_to_fmri
fmrilen = scf_scope_to_fmri(cur_scope, buf, bufsz);
len = scf_scope_to_fmri(scope, out, sz);
len = scf_scope_to_fmri(scope, tmp, 2);
ssize_t scf_scope_to_fmri(const scf_scope_t *, char *, size_t);