+#endif
+ return fd;
+}
+
+struct exfat_dev* exfat_open(const char* spec, enum exfat_mode mode)
+{
+ struct exfat_dev* dev;
+ struct stat stbuf;
+#ifdef USE_UBLIO
+ struct ublio_param up;
+#endif
+
+ dev = malloc(sizeof(struct exfat_dev));
+ if (dev == NULL)
+ {
+ exfat_error("failed to allocate memory for device structure");
+ return NULL;
+ }
+
+ switch (mode)
+ {
+ case EXFAT_MODE_RO:
+ dev->fd = open_ro(spec);
+ if (dev->fd == -1)
+ {
+ free(dev);
+ exfat_error("failed to open `%s' in read-only mode", spec);
+ return NULL;
+ }
+ dev->mode = EXFAT_MODE_RO;
+ break;
+ case EXFAT_MODE_RW:
+ dev->fd = open_rw(spec);
+ if (dev->fd == -1)
+ {
+ free(dev);
+ exfat_error("failed to open `%s' in read-write mode", spec);
+ return NULL;
+ }
+ dev->mode = EXFAT_MODE_RW;
+ break;
+ case EXFAT_MODE_ANY:
+ dev->fd = open_rw(spec);
+ if (dev->fd != -1)
+ {
+ dev->mode = EXFAT_MODE_RW;
+ break;
+ }
+ dev->fd = open_ro(spec);
+ if (dev->fd != -1)
+ {
+ dev->mode = EXFAT_MODE_RO;
+ exfat_warn("`%s' is write-protected, mounting read-only", spec);
+ break;
+ }
+ free(dev);
+ exfat_error("failed to open `%s'", spec);
+ return NULL;
+ }
+
+ if (fstat(dev->fd, &stbuf) != 0)