set_buffer(i);
pos = lseek64(h, offset, SEEK_SET);
if(pos != offset) {
printf("mismatched seek pos %lld offset %lld\n",
pos, offset);
set_buffer(i);
pos = lseek64(h, offset, SEEK_SET);
if(pos != offset) {
printf("mismatched seek pos %lld offset %lld\n",
pos, offset);