Add blkid utilities for fast detection of device signatures.

lib/utils_blkid.h

@@ -0,0 +1,48 @@
+/*
+ * blkid probe utilities
+ *
+ * Copyright (C) 2018, Red Hat, Inc. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifndef _UTILS_BLKID_H
+#define _UTILS_BLKID_H
+
+struct blkid_handle;
+
+typedef enum { PRB_OK = 0, PRB_EMPTY, PRB_AMBIGUOUS, PRB_FAIL } blk_probe_status;
+
+int blk_init_by_path(struct blkid_handle **h, const char *path);
+
+void blk_free(struct blkid_handle *h);
+
+void blk_set_chains_for_fast_detection(struct blkid_handle *h);
+
+int blk_superblocks_filter_luks(struct blkid_handle *h);
+
+blk_probe_status blk_safeprobe(struct blkid_handle *h);
+
+int blk_is_partition(struct blkid_handle *h);
+
+int blk_is_superblock(struct blkid_handle *h);
+
+const char *blk_get_partition_type(struct blkid_handle *h);
+
+const char *blk_get_superblock_type(struct blkid_handle *h);
+
+int blk_supported(void);
+
+#endif