volume_id: provide libvolume_id.a file

Signed-off-by: Kay Sievers <kay.sievers@suse.de>

1 files changed, 85 insertions, 0 deletions

diff --git a/extras/volume_id/libvolume_id/minix.c b/extras/volume_id/libvolume_id/minix.c
new file mode 100644
index 0000000000..ca57745f78
--- /dev/null
+++ b/extras/volume_id/libvolume_id/minix.c
@@ -0,0 +1,85 @@
+/*
+ * volume_id - reads filesystem label and uuid
+ *
+ * Copyright (C) 2005 Kay Sievers <kay.sievers@vrfy.org>
+ *
+ *	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 version 2 of the License.
+ */
+
+#ifndef _GNU_SOURCE
+#define _GNU_SOURCE 1
+#endif
+
+#ifdef HAVE_CONFIG_H
+#  include <config.h>
+#endif
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include <errno.h>
+#include <ctype.h>
+
+#include "volume_id.h"
+#include "logging.h"
+#include "util.h"
+
+struct minix_super_block
+{
+	uint16_t	s_ninodes;
+	uint16_t	s_nzones;
+	uint16_t	s_imap_blocks;
+	uint16_t	s_zmap_blocks;
+	uint16_t	s_firstdatazone;
+	uint16_t	s_log_zone_size;
+	uint32_t	s_max_size;
+	uint16_t	s_magic;
+	uint16_t	s_state;
+	uint32_t	s_zones;
+} __attribute__((__packed__));
+
+#define MINIX_SUPERBLOCK_OFFSET			0x400
+
+int volume_id_probe_minix(struct volume_id *id, uint64_t off)
+{
+	struct minix_super_block *ms;
+
+	dbg("probing at offset 0x%llx", (unsigned long long) off);
+
+	ms = (struct minix_super_block *) volume_id_get_buffer(id, off + MINIX_SUPERBLOCK_OFFSET, 0x200);
+	if (ms == NULL)
+		return -1;
+
+	if (le16_to_cpu(ms->s_magic) == 0x137f) {
+		strcpy(id->type_version, "1");
+		goto found;
+	}
+
+	if (le16_to_cpu(ms->s_magic) == 0x1387) {
+		strcpy(id->type_version, "1");
+		goto found;
+	}
+
+	if (le16_to_cpu(ms->s_magic) == 0x2468) {
+		strcpy(id->type_version, "2");
+		goto found;
+	}
+
+	if (le16_to_cpu(ms->s_magic) == 0x2478) {
+		strcpy(id->type_version, "2");
+		goto found;
+	}
+
+	goto exit;
+
+found:
+	volume_id_set_usage(id, VOLUME_ID_FILESYSTEM);
+	id->type = "minix";
+	return 0;
+
+exit:
+	return -1;
+}