qsort_b
void qsort_b(void *, size_t, size_t,
qsort_b(sp->fts_array, nitems, sizeof(FTSENT *),
qsort_b(sp->fts_array, nitems, sizeof(FTSENT *),
void qsort_b(void *, size_t, size_t, fts_block);
qsort_b(names, numitems, sizeof(struct dirent *),
void qsort_b(void *, size_t, size_t, void *);
qsort_b(testvector, j, sizeof(testvector[0]),