off_t end_offset = sizeof(lispobj) +
sizeof(os_vm_offset_t) +
(RUNTIME_OPTIONS_WORDS * sizeof(size_t));
lseek(fd, -end_offset, SEEK_END);
off_t end_offset = sizeof(lispobj) +
sizeof(os_vm_offset_t) +
(RUNTIME_OPTIONS_WORDS * sizeof(size_t));
lseek(fd, -end_offset, SEEK_END);