lscf_get_selection_str
extern void lscf_get_selection_str(char *, size_t);
lscf_get_selection_str(selfmri, sfsz - 2);
lscf_get_selection_str(fmri, sz);
lscf_get_selection_str(cur_selection,
lscf_get_selection_str(cur_selection, max_scf_fmri_len + 1);