import more libs to prep for new e2fsprogs

16 files changed, 3939 insertions, 0 deletions

diff --git a/e2fsprogs/blkid/blkid.h b/e2fsprogs/blkid/blkid.h
new file mode 100644
index 000000000..3ea94ac80
--- /dev/null
+++ b/e2fsprogs/blkid/blkid.h
@@ -0,0 +1,105 @@
+/*
+ * blkid.h - Interface for libblkid, a library to identify block devices
+ *
+ * Copyright (C) 2001 Andreas Dilger
+ * Copyright (C) 2003 Theodore Ts'o
+ *
+ * %Begin-Header%
+ * This file may be redistributed under the terms of the
+ * GNU Lesser General Public License.
+ * %End-Header%
+ */
+
+#ifndef _BLKID_BLKID_H
+#define _BLKID_BLKID_H
+
+#include <sys/types.h>
+#include <linux/types.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define BLKID_VERSION	"1.0.0"
+#define BLKID_DATE	"12-Feb-2003"
+
+typedef struct blkid_struct_dev *blkid_dev;
+typedef struct blkid_struct_cache *blkid_cache;
+typedef __s64 blkid_loff_t;
+
+typedef struct blkid_struct_tag_iterate *blkid_tag_iterate;
+typedef struct blkid_struct_dev_iterate *blkid_dev_iterate;
+
+/*
+ * Flags for blkid_get_dev
+ *
+ * BLKID_DEV_CREATE	Create an empty device structure if not found
+ * 			in the cache.
+ * BLKID_DEV_VERIFY	Make sure the device structure corresponds
+ * 			with reality.
+ * BLKID_DEV_FIND	Just look up a device entry, and return NULL
+ * 			if it is not found.
+ * BLKID_DEV_NORMAL	Get a valid device structure, either from the
+ * 			cache or by probing the device.
+ */
+#define BLKID_DEV_FIND		0x0000
+#define BLKID_DEV_CREATE	0x0001
+#define BLKID_DEV_VERIFY	0x0002
+#define BLKID_DEV_NORMAL	(BLKID_DEV_CREATE | BLKID_DEV_VERIFY)
+
+/* cache.c */
+extern void blkid_put_cache(blkid_cache cache);
+extern int blkid_get_cache(blkid_cache *cache, const char *filename);
+
+/* dev.c */
+extern const char *blkid_dev_devname(blkid_dev dev);
+
+extern blkid_dev_iterate blkid_dev_iterate_begin(blkid_cache cache);
+extern int blkid_dev_next(blkid_dev_iterate iterate, blkid_dev *dev);
+extern void blkid_dev_iterate_end(blkid_dev_iterate iterate);
+
+/* devno.c */
+extern char *blkid_devno_to_devname(dev_t devno);
+
+/* devname.c */
+extern int blkid_probe_all(blkid_cache cache);
+extern blkid_dev blkid_get_dev(blkid_cache cache, const char *devname,
+			       int flags);
+
+/* getsize.c */
+extern blkid_loff_t blkid_get_dev_size(int fd);
+
+/* probe.c */
+int blkid_known_fstype(const char *fstype);
+extern blkid_dev blkid_verify(blkid_cache cache, blkid_dev dev);
+
+/* read.c */
+
+/* resolve.c */
+extern char *blkid_get_tag_value(blkid_cache cache, const char *tagname,
+				       const char *devname);
+extern char *blkid_get_devname(blkid_cache cache, const char *token,
+			       const char *value);
+
+/* tag.c */
+extern blkid_tag_iterate blkid_tag_iterate_begin(blkid_dev dev);
+extern int blkid_tag_next(blkid_tag_iterate iterate,
+			      const char **type, const char **value);
+extern void blkid_tag_iterate_end(blkid_tag_iterate iterate);
+
+extern blkid_dev blkid_find_dev_with_tag(blkid_cache cache,
+					 const char *type,
+					 const char *value);
+extern int blkid_parse_tag_string(const char *token, char **ret_type,
+				  char **ret_val);
+
+/* version.c */
+extern int blkid_parse_version_string(const char *ver_string);
+extern int blkid_get_library_version(const char **ver_string,
+				     const char **date_string);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _BLKID_BLKID_H */
diff --git a/e2fsprogs/blkid/blkidP.h b/e2fsprogs/blkid/blkidP.h
new file mode 100644
index 000000000..1bb94907e
--- /dev/null
+++ b/e2fsprogs/blkid/blkidP.h
@@ -0,0 +1,239 @@
+/*
+ * blkidP.h - Internal interfaces for libblkid
+ *
+ * Copyright (C) 2001 Andreas Dilger
+ * Copyright (C) 2003 Theodore Ts'o
+ *
+ * %Begin-Header%
+ * This file may be redistributed under the terms of the
+ * GNU Lesser General Public License.
+ * %End-Header%
+ */
+
+#ifndef _BLKID_BLKIDP_H
+#define _BLKID_BLKIDP_H
+
+#include <sys/types.h>
+#include <stdio.h>
+
+#include <blkid/blkid.h>
+
+#include <blkid/list.h>
+
+#ifdef __GNUC__
+#define __BLKID_ATTR(x) __attribute__(x)
+#else
+#define __BLKID_ATTR(x)
+#endif
+
+
+/*
+ * This describes the attributes of a specific device.
+ * We can traverse all of the tags by bid_tags (linking to the tag bit_names).
+ * The bid_label and bid_uuid fields are shortcuts to the LABEL and UUID tag
+ * values, if they exist.
+ */
+struct blkid_struct_dev
+{
+	struct list_head	bid_devs;	/* All devices in the cache */
+	struct list_head	bid_tags;	/* All tags for this device */
+	blkid_cache		bid_cache;	/* Dev belongs to this cache */
+	char			*bid_name;	/* Device inode pathname */
+	char			*bid_type;	/* Preferred device TYPE */
+	int			bid_pri;	/* Device priority */
+	dev_t			bid_devno;	/* Device major/minor number */
+	time_t			bid_time;	/* Last update time of device */
+	unsigned int		bid_flags;	/* Device status bitflags */
+	char			*bid_label;	/* Shortcut to device LABEL */
+	char			*bid_uuid;	/* Shortcut to binary UUID */
+};
+
+#define BLKID_BID_FL_VERIFIED	0x0001	/* Device data validated from disk */
+#define BLKID_BID_FL_INVALID	0x0004	/* Device is invalid */
+
+/*
+ * Each tag defines a NAME=value pair for a particular device.  The tags
+ * are linked via bit_names for a single device, so that traversing the
+ * names list will get you a list of all tags associated with a device.
+ * They are also linked via bit_values for all devices, so one can easily
+ * search all tags with a given NAME for a specific value.
+ */
+struct blkid_struct_tag
+{
+	struct list_head	bit_tags;	/* All tags for this device */
+	struct list_head	bit_names;	/* All tags with given NAME */
+	char			*bit_name;	/* NAME of tag (shared) */
+	char			*bit_val;	/* value of tag */
+	blkid_dev		bit_dev;	/* pointer to device */
+};
+typedef struct blkid_struct_tag *blkid_tag;
+
+/*
+ * Minimum number of seconds between device probes, even when reading
+ * from the cache.  This is to avoid re-probing all devices which were
+ * just probed by another program that does not share the cache.
+ */
+#define BLKID_PROBE_MIN		2
+
+/*
+ * Time in seconds an entry remains verified in the in-memory cache
+ * before being reverified (in case of long-running processes that
+ * keep a cache in memory and continue to use it for a long time).
+ */
+#define BLKID_PROBE_INTERVAL	200
+
+/* This describes an entire blkid cache file and probed devices.
+ * We can traverse all of the found devices via bic_list.
+ * We can traverse all of the tag types by bic_tags, which hold empty tags
+ * for each tag type.  Those tags can be used as list_heads for iterating
+ * through all devices with a specific tag type (e.g. LABEL).
+ */
+struct blkid_struct_cache
+{
+	struct list_head	bic_devs;	/* List head of all devices */
+	struct list_head	bic_tags;	/* List head of all tag types */
+	time_t			bic_time;	/* Last probe time */
+	time_t			bic_ftime; 	/* Mod time of the cachefile */
+	unsigned int		bic_flags;	/* Status flags of the cache */
+	char			*bic_filename;	/* filename of cache */
+};
+
+#define BLKID_BIC_FL_PROBED	0x0002	/* We probed /proc/partition devices */
+#define BLKID_BIC_FL_CHANGED	0x0004	/* Cache has changed from disk */
+
+extern char *blkid_strdup(const char *s);
+extern char *blkid_strndup(const char *s, const int length);
+
+#define BLKID_CACHE_FILE "/etc/blkid.tab"
+extern const char *blkid_devdirs[];
+
+#define BLKID_ERR_IO	 5
+#define BLKID_ERR_PROC	 9
+#define BLKID_ERR_MEM	12
+#define BLKID_ERR_CACHE	14
+#define BLKID_ERR_DEV	19
+#define BLKID_ERR_PARAM	22
+#define BLKID_ERR_BIG	27
+
+/*
+ * Priority settings for different types of devices
+ */
+#define BLKID_PRI_EVMS	30
+#define BLKID_PRI_LVM	20
+#define BLKID_PRI_MD	10
+
+#if defined(TEST_PROGRAM) && !defined(CONFIG_BLKID_DEBUG)
+#define CONFIG_BLKID_DEBUG
+#endif
+
+#define DEBUG_CACHE	0x0001
+#define DEBUG_DUMP	0x0002
+#define DEBUG_DEV	0x0004
+#define DEBUG_DEVNAME	0x0008
+#define DEBUG_DEVNO	0x0010
+#define DEBUG_PROBE	0x0020
+#define DEBUG_READ	0x0040
+#define DEBUG_RESOLVE	0x0080
+#define DEBUG_SAVE	0x0100
+#define DEBUG_TAG	0x0200
+#define DEBUG_INIT	0x8000
+#define DEBUG_ALL	0xFFFF
+
+#ifdef CONFIG_BLKID_DEBUG
+#include <stdio.h>
+extern int	blkid_debug_mask;
+#define DBG(m,x)	if ((m) & blkid_debug_mask) x;
+#else
+#define DBG(m,x)
+#endif
+
+#ifdef CONFIG_BLKID_DEBUG
+static inline void DEB_DUMP_TAG(int mask, blkid_tag tag)
+{
+	if (!(mask & blkid_debug_mask))
+		return;
+	
+	if (!tag) {
+		printf("    tag: NULL\n");
+		return;
+	}
+
+	printf("    tag: %s=\"%s\"\n", tag->bit_name, tag->bit_val);
+}
+
+static inline void DEB_DUMP_DEV(int mask, blkid_dev dev)
+{
+	struct list_head *p;
+
+	if (!(mask & blkid_debug_mask))
+		return;
+	
+	if (!dev) {
+		printf("  dev: NULL\n");
+		return;
+	}
+
+	printf("  dev: name = %s\n", dev->bid_name);
+	printf("  dev: DEVNO=\"0x%0Lx\"\n", dev->bid_devno);
+	printf("  dev: TIME=\"%lu\"\n", dev->bid_time);
+	printf("  dev: PRI=\"%d\"\n", dev->bid_pri);
+	printf("  dev: flags = 0x%08X\n", dev->bid_flags);
+
+	list_for_each(p, &dev->bid_tags) {
+		blkid_tag tag = list_entry(p, struct blkid_struct_tag, bit_tags);
+		DEB_DUMP_TAG(mask, tag);
+	}
+	printf("\n");
+}
+
+static inline void DEB_DUMP_CACHE(int mask, blkid_cache cache)
+{
+	struct list_head *p;
+
+	if (!cache || !(mask & blkid_debug_mask)) {
+		printf("cache: NULL\n");
+		return;
+	}
+
+	printf("cache: time = %lu\n", cache->bic_time);
+	printf("cache: flags = 0x%08X\n", cache->bic_flags);
+
+	list_for_each(p, &cache->bic_devs) {
+		blkid_dev dev = list_entry(p, struct blkid_struct_dev, bid_devs);
+		DEB_DUMP_DEV(mask, dev);
+	}
+}
+#else
+#define DEB_DUMP_TAG(mask, tag) do {} while (0)
+#define DEB_DUMP_DEV(mask, dev) do {} while (0)
+#define DEB_DUMP_CACHE(mask, cache) do {} while (0)
+#endif
+
+/* lseek.c */
+extern blkid_loff_t blkid_llseek(int fd, blkid_loff_t offset, int whence);
+
+/* read.c */
+extern void blkid_read_cache(blkid_cache cache);
+
+/* save.c */
+extern int blkid_flush_cache(blkid_cache cache);
+
+/*
+ * Functions to create and find a specific tag type: tag.c
+ */
+extern void blkid_free_tag(blkid_tag tag);
+extern blkid_tag blkid_find_tag_dev(blkid_dev dev, const char *type);
+extern int blkid_set_tag(blkid_dev dev, const char *name,
+			 const char *value, const int vlength);
+
+/*
+ * Functions to create and find a specific tag type: dev.c
+ */
+extern blkid_dev blkid_new_dev(void);
+extern void blkid_free_dev(blkid_dev dev);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _BLKID_BLKIDP_H */
diff --git a/e2fsprogs/blkid/cache.c b/e2fsprogs/blkid/cache.c
new file mode 100644
index 000000000..88cc326cc
--- /dev/null
+++ b/e2fsprogs/blkid/cache.c
@@ -0,0 +1,126 @@
+/*
+ * cache.c - allocation/initialization/free routines for cache
+ *
+ * Copyright (C) 2001 Andreas Dilger
+ * Copyright (C) 2003 Theodore Ts'o
+ *
+ * %Begin-Header%
+ * This file may be redistributed under the terms of the
+ * GNU Lesser General Public License.
+ * %End-Header%
+ */
+
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include "blkidP.h"
+
+int blkid_debug_mask = 0;
+
+int blkid_get_cache(blkid_cache *ret_cache, const char *filename)
+{
+	blkid_cache cache;
+
+#ifdef CONFIG_BLKID_DEBUG
+	if (!(blkid_debug_mask & DEBUG_INIT)) {
+		char *dstr = getenv("BLKID_DEBUG");
+
+		if (dstr)
+			blkid_debug_mask = strtoul(dstr, 0, 0);
+		blkid_debug_mask |= DEBUG_INIT;
+	}
+#endif
+
+	DBG(DEBUG_CACHE, printf("creating blkid cache (using %s)\n",
+				filename ? filename : "default cache"));
+
+	if (!(cache = (blkid_cache) calloc(1, sizeof(struct blkid_struct_cache))))
+		return -BLKID_ERR_MEM;
+
+	INIT_LIST_HEAD(&cache->bic_devs);
+	INIT_LIST_HEAD(&cache->bic_tags);
+
+	if (filename && !strlen(filename))
+		filename = 0;
+	if (!filename && (getuid() == geteuid()))
+		filename = getenv("BLKID_FILE");
+	if (!filename)
+		filename = BLKID_CACHE_FILE;
+	cache->bic_filename = blkid_strdup(filename);
+	
+	blkid_read_cache(cache);
+	
+	*ret_cache = cache;
+	return 0;
+}
+
+void blkid_put_cache(blkid_cache cache)
+{
+	if (!cache)
+		return;
+
+	(void) blkid_flush_cache(cache);
+
+	DBG(DEBUG_CACHE, printf("freeing cache struct\n"));
+	
+	/* DEB_DUMP_CACHE(cache); */
+
+	while (!list_empty(&cache->bic_devs)) {
+		blkid_dev dev = list_entry(cache->bic_devs.next,
+					   struct blkid_struct_dev,
+					    bid_devs);
+		blkid_free_dev(dev);
+	}
+
+	while (!list_empty(&cache->bic_tags)) {
+		blkid_tag tag = list_entry(cache->bic_tags.next,
+					   struct blkid_struct_tag,
+					   bit_tags);
+
+		while (!list_empty(&tag->bit_names)) {
+			blkid_tag bad = list_entry(tag->bit_names.next,
+						   struct blkid_struct_tag, 
+						   bit_names);
+
+			DBG(DEBUG_CACHE, printf("warning: unfreed tag %s=%s\n",
+						bad->bit_name, bad->bit_val));
+			blkid_free_tag(bad);
+		}
+		blkid_free_tag(tag);
+	}
+	if (cache->bic_filename)
+		free(cache->bic_filename);
+	
+	free(cache);
+}
+
+#ifdef TEST_PROGRAM
+int main(int argc, char** argv)
+{
+	blkid_cache cache = NULL;
+	int ret;
+
+	blkid_debug_mask = DEBUG_ALL;
+	if ((argc > 2)) {
+		fprintf(stderr, "Usage: %s [filename] \n", argv[0]);
+		exit(1);
+	}
+
+	if ((ret = blkid_get_cache(&cache, argv[1])) < 0) {
+		fprintf(stderr, "error %d parsing cache file %s\n", ret,
+			argv[1] ? argv[1] : BLKID_CACHE_FILE);
+		exit(1);
+	}
+	if ((ret = blkid_get_cache(&cache, "/dev/null")) != 0) {
+		fprintf(stderr, "%s: error creating cache (%d)\n",
+			argv[0], ret);
+		exit(1);
+	}
+	if ((ret = blkid_probe_all(cache) < 0))
+		fprintf(stderr, "error probing devices\n");
+
+	blkid_put_cache(cache);
+
+	return ret;
+}
+#endif
diff --git a/e2fsprogs/blkid/dev.c b/e2fsprogs/blkid/dev.c
new file mode 100644
index 000000000..23af8878d
--- /dev/null
+++ b/e2fsprogs/blkid/dev.c
@@ -0,0 +1,118 @@
+/*
+ * dev.c - allocation/initialization/free routines for dev
+ *
+ * Copyright (C) 2001 Andreas Dilger
+ * Copyright (C) 2003 Theodore Ts'o
+ *
+ * %Begin-Header%
+ * This file may be redistributed under the terms of the
+ * GNU Lesser General Public License.
+ * %End-Header%
+ */
+
+#include <stdlib.h>
+#include <string.h>
+
+#include "blkidP.h"
+
+blkid_dev blkid_new_dev(void)
+{
+	blkid_dev dev;
+
+	if (!(dev = (blkid_dev) calloc(1, sizeof(struct blkid_struct_dev))))
+		return NULL;
+
+	INIT_LIST_HEAD(&dev->bid_devs);
+	INIT_LIST_HEAD(&dev->bid_tags);
+
+	return dev;
+}
+
+void blkid_free_dev(blkid_dev dev)
+{
+	if (!dev)
+		return;
+
+	DBG(DEBUG_DEV,
+	    printf("  freeing dev %s (%s)\n", dev->bid_name, dev->bid_type));
+	DEB_DUMP_DEV(DEBUG_DEV, dev);
+
+	list_del(&dev->bid_devs);
+	while (!list_empty(&dev->bid_tags)) {
+		blkid_tag tag = list_entry(dev->bid_tags.next,
+					   struct blkid_struct_tag,
+					   bit_tags);
+		blkid_free_tag(tag);
+	}
+	if (dev->bid_name)
+		free(dev->bid_name);
+	free(dev);
+}
+
+/*
+ * Given a blkid device, return its name
+ */
+extern const char *blkid_dev_devname(blkid_dev dev)
+{
+	return dev->bid_name;
+}
+
+/*
+ * dev iteration routines for the public libblkid interface.
+ *
+ * These routines do not expose the list.h implementation, which are a
+ * contamination of the namespace, and which force us to reveal far, far
+ * too much of our internal implemenation.  I'm not convinced I want
+ * to keep list.h in the long term, anyway.  It's fine for kernel
+ * programming, but performance is not the #1 priority for this
+ * library, and I really don't like the tradeoff of type-safety for
+ * performance for this application.  [tytso:20030125.2007EST]
+ */
+
+/*
+ * This series of functions iterate over all devices in a blkid cache
+ */
+#define DEV_ITERATE_MAGIC	0x01a5284c
+	
+struct blkid_struct_dev_iterate {
+	int			magic;
+	blkid_cache		cache;
+	struct list_head	*p;
+};
+
+extern blkid_dev_iterate blkid_dev_iterate_begin(blkid_cache cache)
+{
+	blkid_dev_iterate	iter;
+
+	iter = malloc(sizeof(struct blkid_struct_dev_iterate));
+	if (iter) {
+		iter->magic = DEV_ITERATE_MAGIC;
+		iter->cache = cache;
+		iter->p	= cache->bic_devs.next;
+	}
+	return (iter);
+}
+
+/*
+ * Return 0 on success, -1 on error
+ */
+extern int blkid_dev_next(blkid_dev_iterate iter,
+			  blkid_dev *dev)
+{
+	*dev = 0;
+	if (!iter || iter->magic != DEV_ITERATE_MAGIC ||
+	    iter->p == &iter->cache->bic_devs)
+		return -1;
+	*dev = list_entry(iter->p, struct blkid_struct_dev, bid_devs);
+	iter->p = iter->p->next;
+	return 0;
+}
+
+extern void blkid_dev_iterate_end(blkid_dev_iterate iter)
+{
+	if (!iter || iter->magic != DEV_ITERATE_MAGIC)
+		return;
+	iter->magic = 0;
+	free(iter);
+}
+
diff --git a/e2fsprogs/blkid/devname.c b/e2fsprogs/blkid/devname.c
new file mode 100644
index 000000000..87d5cbef3
--- /dev/null
+++ b/e2fsprogs/blkid/devname.c
@@ -0,0 +1,376 @@
+/*
+ * devname.c - get a dev by its device inode name
+ *
+ * Copyright (C) Andries Brouwer
+ * Copyright (C) 1999, 2000, 2001, 2002, 2003 Theodore Ts'o
+ * Copyright (C) 2001 Andreas Dilger
+ *
+ * %Begin-Header%
+ * This file may be redistributed under the terms of the
+ * GNU Lesser General Public License.
+ * %End-Header%
+ */
+
+#include <stdio.h>
+#include <string.h>
+#if HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+#include <stdlib.h>
+#include <string.h>
+#include <ctype.h>
+#if HAVE_SYS_TYPES_H
+#include <sys/types.h>
+#endif
+#if HAVE_SYS_STAT_H
+#include <sys/stat.h>
+#endif
+#if HAVE_ERRNO_H
+#include <errno.h>
+#endif
+#if HAVE_SYS_MKDEV_H
+#include <sys/mkdev.h>
+#endif
+#include <time.h>
+
+#include "blkidP.h"
+
+/*
+ * Find a dev struct in the cache by device name, if available.
+ *
+ * If there is no entry with the specified device name, and the create
+ * flag is set, then create an empty device entry.
+ */
+blkid_dev blkid_get_dev(blkid_cache cache, const char *devname, int flags)
+{
+	blkid_dev dev = NULL, tmp;
+	struct list_head *p;
+
+	if (!cache || !devname)
+		return NULL;
+
+	list_for_each(p, &cache->bic_devs) {
+		tmp = list_entry(p, struct blkid_struct_dev, bid_devs);
+		if (strcmp(tmp->bid_name, devname))
+			continue;
+
+		DBG(DEBUG_DEVNAME, 
+		    printf("found devname %s in cache\n", tmp->bid_name));
+		dev = tmp;
+		break;
+	}
+
+	if (!dev && (flags & BLKID_DEV_CREATE)) {
+		dev = blkid_new_dev();
+		if (!dev)
+			return NULL;
+		dev->bid_name = blkid_strdup(devname);
+		dev->bid_cache = cache;
+		list_add_tail(&dev->bid_devs, &cache->bic_devs);
+		cache->bic_flags |= BLKID_BIC_FL_CHANGED;
+	}
+
+	if (flags & BLKID_DEV_VERIFY)
+		dev = blkid_verify(cache, dev);
+	return dev;
+}
+
+/*
+ * Probe a single block device to add to the device cache.
+ */
+static void probe_one(blkid_cache cache, const char *ptname,
+		      dev_t devno, int pri)
+{
+	blkid_dev dev = NULL;
+	struct list_head *p;
+	const char **dir;
+	char *devname = NULL;
+
+	/* See if we already have this device number in the cache. */
+	list_for_each(p, &cache->bic_devs) {
+		blkid_dev tmp = list_entry(p, struct blkid_struct_dev,
+					   bid_devs);
+		if (tmp->bid_devno == devno) {
+			dev = blkid_verify(cache, tmp);
+			break;
+		}
+	}
+	if (dev && dev->bid_devno == devno)
+		goto set_pri;
+
+	/*
+	 * Take a quick look at /dev/ptname for the device number.  We check
+	 * all of the likely device directories.  If we don't find it, or if
+	 * the stat information doesn't check out, use blkid_devno_to_devname()
+	 * to find it via an exhaustive search for the device major/minor.
+	 */
+	for (dir = blkid_devdirs; *dir; dir++) {
+		struct stat st;
+		char device[256];
+
+		sprintf(device, "%s/%s", *dir, ptname);
+		if ((dev = blkid_get_dev(cache, device, BLKID_DEV_FIND)) &&
+		    dev->bid_devno == devno)
+			goto set_pri;
+
+		if (stat(device, &st) == 0 && S_ISBLK(st.st_mode) && 
+		    st.st_rdev == devno) {
+			devname = blkid_strdup(device);
+			break;
+		}
+	}
+	if (!devname) {
+		devname = blkid_devno_to_devname(devno);
+		if (!devname)
+			return;
+	}
+	dev = blkid_get_dev(cache, devname, BLKID_DEV_NORMAL);
+	free(devname);
+
+set_pri:
+	if (!pri && !strncmp(ptname, "md", 2))
+		pri = BLKID_PRI_MD;
+	if (dev)
+		dev->bid_pri = pri;
+	return;
+}
+
+#define PROC_PARTITIONS "/proc/partitions"
+#define VG_DIR		"/proc/lvm/VGs"
+
+/*
+ * This function initializes the UUID cache with devices from the LVM
+ * proc hierarchy.  We currently depend on the names of the LVM
+ * hierarchy giving us the device structure in /dev.  (XXX is this a
+ * safe thing to do?)
+ */
+#ifdef VG_DIR
+#include <dirent.h>
+static dev_t lvm_get_devno(const char *lvm_device)
+{
+	FILE *lvf;
+	char buf[1024];
+	int ma, mi;
+	dev_t ret = 0;
+
+	DBG(DEBUG_DEVNAME, printf("opening %s\n", lvm_device));
+	if ((lvf = fopen(lvm_device, "r")) == NULL) {
+		DBG(DEBUG_DEVNAME, printf("%s: (%d) %s\n", lvm_device, errno,
+					  strerror(errno)));
+		return 0;
+	}
+
+	while (fgets(buf, sizeof(buf), lvf)) {
+		if (sscanf(buf, "device: %d:%d", &ma, &mi) == 2) {
+			ret = makedev(ma, mi);
+			break;
+		}
+	}
+	fclose(lvf);
+
+	return ret;
+}
+
+static void lvm_probe_all(blkid_cache cache)
+{
+	DIR		*vg_list;
+	struct dirent	*vg_iter;
+	int		vg_len = strlen(VG_DIR);
+	dev_t		dev;
+
+	if ((vg_list = opendir(VG_DIR)) == NULL)
+		return;
+
+	DBG(DEBUG_DEVNAME, printf("probing LVM devices under %s\n", VG_DIR));
+
+	while ((vg_iter = readdir(vg_list)) != NULL) {
+		DIR		*lv_list;
+		char		*vdirname;
+		char		*vg_name;
+		struct dirent	*lv_iter;
+
+		vg_name = vg_iter->d_name;
+		if (!strcmp(vg_name, ".") || !strcmp(vg_name, ".."))
+			continue;
+		vdirname = malloc(vg_len + strlen(vg_name) + 8);
+		if (!vdirname)
+			goto exit;
+		sprintf(vdirname, "%s/%s/LVs", VG_DIR, vg_name);
+
+		lv_list = opendir(vdirname);
+		free(vdirname);
+		if (lv_list == NULL)
+			continue;
+
+		while ((lv_iter = readdir(lv_list)) != NULL) {
+			char		*lv_name, *lvm_device;
+
+			lv_name = lv_iter->d_name;
+			if (!strcmp(lv_name, ".") || !strcmp(lv_name, ".."))
+				continue;
+
+			lvm_device = malloc(vg_len + strlen(vg_name) +
+					    strlen(lv_name) + 8);
+			if (!lvm_device) {
+				closedir(lv_list);
+				goto exit;
+			}
+			sprintf(lvm_device, "%s/%s/LVs/%s", VG_DIR, vg_name,
+				lv_name);
+			dev = lvm_get_devno(lvm_device);
+			sprintf(lvm_device, "%s/%s", vg_name, lv_name);
+			DBG(DEBUG_DEVNAME, printf("LVM dev %s: devno 0x%04X\n",
+						  lvm_device,
+						  (unsigned int) dev));
+			probe_one(cache, lvm_device, dev, BLKID_PRI_LVM);
+			free(lvm_device);
+		}
+		closedir(lv_list);
+	}
+exit:
+	closedir(vg_list);
+}
+#endif
+
+#define PROC_EVMS_VOLUMES "/proc/evms/volumes"
+
+static int
+evms_probe_all(blkid_cache cache)
+{
+	char line[100];
+	int ma, mi, sz, num = 0;
+	FILE *procpt;
+	char device[110];
+
+	procpt = fopen(PROC_EVMS_VOLUMES, "r");
+	if (!procpt)
+		return 0;
+	while (fgets(line, sizeof(line), procpt)) {
+		if (sscanf (line, " %d %d %d %*s %*s %[^\n ]",
+			    &ma, &mi, &sz, device) != 4)
+			continue;
+
+		DBG(DEBUG_DEVNAME, printf("Checking partition %s (%d, %d)\n",
+					  device, ma, mi));
+
+		probe_one(cache, device, makedev(ma, mi), BLKID_PRI_EVMS);
+		num++;
+	}
+	fclose(procpt);
+	return num;
+}
+
+/*
+ * Read the device data for all available block devices in the system.
+ */
+int blkid_probe_all(blkid_cache cache)
+{
+	FILE *proc;
+	char line[1024];
+	char ptname0[128], ptname1[128], *ptname = 0;
+	char *ptnames[2];
+	dev_t devs[2];
+	int ma, mi;
+	unsigned long long sz;
+	int lens[2] = { 0, 0 };
+	int which = 0, last = 0;
+
+	ptnames[0] = ptname0;
+	ptnames[1] = ptname1;
+
+	if (!cache)
+		return -BLKID_ERR_PARAM;
+
+	if (cache->bic_flags & BLKID_BIC_FL_PROBED &&
+	    time(0) - cache->bic_time < BLKID_PROBE_INTERVAL)
+		return 0;
+
+	blkid_read_cache(cache);
+	evms_probe_all(cache);
+#ifdef VG_DIR
+	lvm_probe_all(cache);
+#endif
+
+	proc = fopen(PROC_PARTITIONS, "r");
+	if (!proc)
+		return -BLKID_ERR_PROC;
+
+	while (fgets(line, sizeof(line), proc)) {
+		last = which;
+		which ^= 1;
+		ptname = ptnames[which];
+
+		if (sscanf(line, " %d %d %llu %128[^\n ]",
+			   &ma, &mi, &sz, ptname) != 4)
+			continue;
+		devs[which] = makedev(ma, mi);
+
+		DBG(DEBUG_DEVNAME, printf("read partition name %s\n", ptname));
+
+		/* Skip whole disk devs unless they have no partitions
+		 * If we don't have a partition on this dev, also
+		 * check previous dev to see if it didn't have a partn.
+		 * heuristic: partition name ends in a digit.
+		 *
+		 * Skip extended partitions.
+		 * heuristic: size is 1
+		 *
+		 * FIXME: skip /dev/{ida,cciss,rd} whole-disk devs
+		 */
+
+		lens[which] = strlen(ptname);
+		if (isdigit(ptname[lens[which] - 1])) {
+			DBG(DEBUG_DEVNAME,
+			    printf("partition dev %s, devno 0x%04X\n",
+				   ptname, (unsigned int) devs[which]));
+
+			if (sz > 1)
+				probe_one(cache, ptname, devs[which], 0);
+			lens[which] = 0;
+			lens[last] = 0;
+		} else if (lens[last] && strncmp(ptnames[last], ptname,
+						 lens[last])) {
+			DBG(DEBUG_DEVNAME,
+			    printf("whole dev %s, devno 0x%04X\n",
+				   ptnames[last], (unsigned int) devs[last]));
+			probe_one(cache, ptnames[last], devs[last], 0);
+			lens[last] = 0;
+		}
+	}
+
+	/* Handle the last device if it wasn't partitioned */
+	if (lens[which])
+		probe_one(cache, ptname, devs[which], 0);
+
+	fclose(proc);
+
+	cache->bic_time = time(0);
+	cache->bic_flags |= BLKID_BIC_FL_PROBED;
+	blkid_flush_cache(cache);
+	return 0;
+}
+
+#ifdef TEST_PROGRAM
+int main(int argc, char **argv)
+{
+	blkid_cache cache = NULL;
+	int ret;
+
+	blkid_debug_mask = DEBUG_ALL;
+	if (argc != 1) {
+		fprintf(stderr, "Usage: %s\n"
+			"Probe all devices and exit\n", argv[0]);
+		exit(1);
+	}
+	if ((ret = blkid_get_cache(&cache, "/dev/null")) != 0) {
+		fprintf(stderr, "%s: error creating cache (%d)\n",
+			argv[0], ret);
+		exit(1);
+	}
+	if (blkid_probe_all(cache) < 0)
+		printf("%s: error probing devices\n", argv[0]);
+
+	blkid_put_cache(cache);
+	return (0);
+}
+#endif
diff --git a/e2fsprogs/blkid/devno.c b/e2fsprogs/blkid/devno.c
new file mode 100644
index 000000000..31aa52bb4
--- /dev/null
+++ b/e2fsprogs/blkid/devno.c
@@ -0,0 +1,233 @@
+/*
+ * devno.c - find a particular device by its device number (major/minor)
+ *
+ * Copyright (C) 2000, 2001, 2003 Theodore Ts'o
+ * Copyright (C) 2001 Andreas Dilger
+ *
+ * %Begin-Header%
+ * This file may be redistributed under the terms of the
+ * GNU Lesser General Public License.
+ * %End-Header%
+ */
+
+#include <stdio.h>
+#include <string.h>
+#if HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+#include <stdlib.h>
+#include <string.h>
+#if HAVE_SYS_TYPES_H
+#include <sys/types.h>
+#endif
+#if HAVE_SYS_STAT_H
+#include <sys/stat.h>
+#endif
+#include <dirent.h>
+#if HAVE_ERRNO_H
+#include <errno.h>
+#endif
+#if HAVE_SYS_MKDEV_H
+#include <sys/mkdev.h>
+#endif
+
+#include "blkidP.h"
+
+struct dir_list {
+	char	*name;
+	struct dir_list *next;
+};
+
+char *blkid_strndup(const char *s, int length)
+{
+	char *ret;
+
+	if (!s)
+		return NULL;
+
+	if (!length)
+		length = strlen(s);
+
+	ret = malloc(length + 1);
+	if (ret) {
+		strncpy(ret, s, length);
+		ret[length] = '\0';
+	}
+	return ret;
+}
+
+char *blkid_strdup(const char *s)
+{
+	return blkid_strndup(s, 0);
+}
+
+/*
+ * This function adds an entry to the directory list
+ */
+static void add_to_dirlist(const char *name, struct dir_list **list)
+{
+	struct dir_list *dp;
+
+	dp = malloc(sizeof(struct dir_list));
+	if (!dp)
+		return;
+	dp->name = blkid_strdup(name);
+	if (!dp->name) {
+		free(dp);
+		return;
+	}
+	dp->next = *list;
+	*list = dp;
+}
+
+/*
+ * This function frees a directory list
+ */
+static void free_dirlist(struct dir_list **list)
+{
+	struct dir_list *dp, *next;
+
+	for (dp = *list; dp; dp = next) {
+		next = dp->next;
+		free(dp->name);
+		free(dp);
+	}
+	*list = NULL;
+}
+
+static void scan_dir(char *dir_name, dev_t devno, struct dir_list **list,
+			    char **devname)
+{
+	DIR	*dir;
+	struct dirent *dp;
+	char	path[1024];
+	int	dirlen;
+	struct stat st;
+
+	if ((dir = opendir(dir_name)) == NULL)
+		return;
+	dirlen = strlen(dir_name) + 2;
+	while ((dp = readdir(dir)) != 0) {
+		if (dirlen + strlen(dp->d_name) >= sizeof(path))
+			continue;
+
+		if (dp->d_name[0] == '.' &&
+		    ((dp->d_name[1] == 0) ||
+		     ((dp->d_name[1] == '.') && (dp->d_name[2] == 0))))
+			continue;
+
+		sprintf(path, "%s/%s", dir_name, dp->d_name);
+		if (stat(path, &st) < 0)
+			continue;
+
+		if (S_ISDIR(st.st_mode))
+			add_to_dirlist(path, list);
+		else if (S_ISBLK(st.st_mode) && st.st_rdev == devno) {
+			*devname = blkid_strdup(path);
+			DBG(DEBUG_DEVNO,
+			    printf("found 0x%Lx at %s (%p)\n", devno,
+				   path, *devname));
+			break;
+		}
+	}
+	closedir(dir);
+	return;
+}
+
+/* Directories where we will try to search for device numbers */
+const char *blkid_devdirs[] = { "/devices", "/devfs", "/dev", NULL };
+
+/*
+ * This function finds the pathname to a block device with a given
+ * device number.  It returns a pointer to allocated memory to the
+ * pathname on success, and NULL on failure.
+ */
+char *blkid_devno_to_devname(dev_t devno)
+{
+	struct dir_list *list = NULL, *new_list = NULL;
+	char *devname = NULL;
+	const char **dir;
+
+	/*
+	 * Add the starting directories to search in reverse order of
+	 * importance, since we are using a stack...
+	 */
+	for (dir = blkid_devdirs; *dir; dir++)
+		add_to_dirlist(*dir, &list);
+
+	while (list) {
+		struct dir_list *current = list;
+
+		list = list->next;
+		DBG(DEBUG_DEVNO, printf("directory %s\n", current->name));
+		scan_dir(current->name, devno, &new_list, &devname);
+		free(current->name);
+		free(current);
+		if (devname)
+			break;
+		/*
+		 * If we're done checking at this level, descend to
+		 * the next level of subdirectories. (breadth-first)
+		 */
+		if (list == NULL) {
+			list = new_list;
+			new_list = NULL;
+		}
+	}
+	free_dirlist(&list);
+	free_dirlist(&new_list);
+
+	if (!devname) {
+		DBG(DEBUG_DEVNO,
+		    printf("blkid: couldn't find devno 0x%04lx\n", 
+			   (unsigned long) devno));
+	} else {
+		DBG(DEBUG_DEVNO,
+		    printf("found devno 0x%04Lx as %s\n", devno, devname));
+	}
+	
+
+	return devname;
+}
+
+#ifdef TEST_PROGRAM
+int main(int argc, char** argv)
+{
+	char	*devname, *tmp;
+	int	major, minor;
+	dev_t	devno;
+	const char *errmsg = "Couldn't parse %s: %s\n";
+
+	blkid_debug_mask = DEBUG_ALL;
+	if ((argc != 2) && (argc != 3)) {
+		fprintf(stderr, "Usage:\t%s device_number\n\t%s major minor\n"
+			"Resolve a device number to a device name\n",
+			argv[0], argv[0]);
+		exit(1);
+	}
+	if (argc == 2) {
+		devno = strtoul(argv[1], &tmp, 0);
+		if (*tmp) {
+			fprintf(stderr, errmsg, "device number", argv[1]);
+			exit(1);
+		}
+	} else {
+		major = strtoul(argv[1], &tmp, 0);
+		if (*tmp) {
+			fprintf(stderr, errmsg, "major number", argv[1]);
+			exit(1);
+		}
+		minor = strtoul(argv[2], &tmp, 0);
+		if (*tmp) {
+			fprintf(stderr, errmsg, "minor number", argv[2]);
+			exit(1);
+		}
+		devno = makedev(major, minor);
+	}
+	printf("Looking for device 0x%04Lx\n", devno);
+	devname = blkid_devno_to_devname(devno);
+	if (devname)
+		free(devname);
+	return 0;
+}
+#endif
diff --git a/e2fsprogs/blkid/getsize.c b/e2fsprogs/blkid/getsize.c
new file mode 100644
index 000000000..9458c08bf
--- /dev/null
+++ b/e2fsprogs/blkid/getsize.c
@@ -0,0 +1,180 @@
+/*
+ * getsize.c --- get the size of a partition.
+ *
+ * Copyright (C) 1995, 1995 Theodore Ts'o.
+ *
+ * %Begin-Header%
+ * This file may be redistributed under the terms of the
+ * GNU Lesser General Public License.
+ * %End-Header%
+ */
+
+/* include this before sys/queues.h! */
+#include "blkidP.h"
+
+#include <stdio.h>
+#if HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+#if HAVE_ERRNO_H
+#include <errno.h>
+#endif
+#include <fcntl.h>
+#ifdef HAVE_SYS_IOCTL_H
+#include <sys/ioctl.h>
+#endif
+#ifdef HAVE_LINUX_FD_H
+#include <linux/fd.h>
+#endif
+#ifdef HAVE_SYS_DISKLABEL_H
+#include <sys/disklabel.h>
+#include <sys/stat.h>
+#endif
+#ifdef HAVE_SYS_DISK_H
+#ifdef HAVE_SYS_QUEUE_H
+#include <sys/queue.h> /* for LIST_HEAD */
+#endif
+#include <sys/disk.h>
+#endif
+#ifdef __linux__
+#include <sys/utsname.h>
+#endif
+
+#if defined(__linux__) && defined(_IO) && !defined(BLKGETSIZE)
+#define BLKGETSIZE _IO(0x12,96)	/* return device size */
+#endif
+
+#if defined(__linux__) && defined(_IOR) && !defined(BLKGETSIZE64)
+#define BLKGETSIZE64 _IOR(0x12,114,size_t)	/* return device size in bytes (u64 *arg) */
+#endif
+
+#ifdef APPLE_DARWIN
+#define BLKGETSIZE DKIOCGETBLOCKCOUNT32
+#endif /* APPLE_DARWIN */
+
+static int valid_offset(int fd, blkid_loff_t offset)
+{
+	char ch;
+
+	if (blkid_llseek(fd, offset, 0) < 0)
+		return 0;
+	if (read(fd, &ch, 1) < 1)
+		return 0;
+	return 1;
+}
+
+/*
+ * Returns the number of blocks in a partition
+ */
+blkid_loff_t blkid_get_dev_size(int fd)
+{
+	int valid_blkgetsize64 = 1;
+#ifdef __linux__
+	struct 		utsname ut;
+#endif
+	unsigned long long size64;
+	unsigned long size;
+	blkid_loff_t high, low;
+#ifdef FDGETPRM
+	struct floppy_struct this_floppy;
+#endif
+#ifdef HAVE_SYS_DISKLABEL_H
+	int part = -1;
+	struct disklabel lab;
+	struct partition *pp;
+	char ch;
+	struct stat st;
+#endif /* HAVE_SYS_DISKLABEL_H */
+
+#ifdef DKIOCGETBLOCKCOUNT	/* For Apple Darwin */
+	if (ioctl(fd, DKIOCGETBLOCKCOUNT, &size64) >= 0) {
+		if ((sizeof(blkid_loff_t) < sizeof(unsigned long long))
+		    && (size64 << 9 > 0xFFFFFFFF))
+			return 0; /* EFBIG */
+		return (blkid_loff_t) size64 << 9;
+	}
+#endif
+
+#ifdef BLKGETSIZE64
+#ifdef __linux__
+	if ((uname(&ut) == 0) &&
+	    ((ut.release[0] == '2') && (ut.release[1] == '.') &&
+	     (ut.release[2] < '6') && (ut.release[3] == '.')))
+		valid_blkgetsize64 = 0;
+#endif
+	if (valid_blkgetsize64 &&
+	    ioctl(fd, BLKGETSIZE64, &size64) >= 0) {
+		if ((sizeof(blkid_loff_t) < sizeof(unsigned long long))
+		    && ((size64) > 0xFFFFFFFF))
+			return 0; /* EFBIG */
+		return size64;
+	}
+#endif
+
+#ifdef BLKGETSIZE
+	if (ioctl(fd, BLKGETSIZE, &size) >= 0)
+		return (blkid_loff_t)size << 9;
+#endif
+
+#ifdef FDGETPRM
+	if (ioctl(fd, FDGETPRM, &this_floppy) >= 0)
+		return (blkid_loff_t)this_floppy.size << 9;
+#endif
+#ifdef HAVE_SYS_DISKLABEL_H
+#if 0
+	/*
+	 * This should work in theory but I haven't tested it.  Anyone
+	 * on a BSD system want to test this for me?  In the meantime,
+	 * binary search mechanism should work just fine.
+	 */
+	if ((fstat(fd, &st) >= 0) && S_ISBLK(st.st_mode))
+		part = st.st_rdev & 7;
+	if (part >= 0 && (ioctl(fd, DIOCGDINFO, (char *)&lab) >= 0)) {
+		pp = &lab.d_partitions[part];
+		if (pp->p_size)
+			return pp->p_size << 9;
+	}
+#endif
+#endif /* HAVE_SYS_DISKLABEL_H */
+
+	/*
+	 * OK, we couldn't figure it out by using a specialized ioctl,
+	 * which is generally the best way.  So do binary search to
+	 * find the size of the partition.
+	 */
+	low = 0;
+	for (high = 1024; valid_offset(fd, high); high *= 2)
+		low = high;
+	while (low < high - 1)
+	{
+		const blkid_loff_t mid = (low + high) / 2;
+
+		if (valid_offset(fd, mid))
+			low = mid;
+		else
+			high = mid;
+	}
+	return low + 1;
+}
+
+#ifdef TEST_PROGRAM
+int main(int argc, char **argv)
+{
+	blkid_loff_t bytes;
+	int	fd;
+
+	if (argc < 2) {
+		fprintf(stderr, "Usage: %s device\n"
+			"Determine the size of a device\n", argv[0]);
+		return 1;
+	}
+
+	if ((fd = open(argv[1], O_RDONLY)) < 0)
+		perror(argv[0]);
+
+	bytes = blkid_get_dev_size(fd);
+	printf("Device %s has %Ld 1k blocks.\n", argv[1], bytes >> 10);
+
+	return 0;
+}
+#endif
diff --git a/e2fsprogs/blkid/list.h b/e2fsprogs/blkid/list.h
new file mode 100644
index 000000000..c1cbfec59
--- /dev/null
+++ b/e2fsprogs/blkid/list.h
@@ -0,0 +1,179 @@
+#if !defined(_BLKID_LIST_H) && !defined(LIST_HEAD)
+#define _BLKID_LIST_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#ifdef __GNUC__
+#define _INLINE_ static __inline__
+#else                         /* For Watcom C */
+#define _INLINE_ static inline
+#endif
+
+/*
+ * Simple doubly linked list implementation.
+ *
+ * Some of the internal functions ("__xxx") are useful when
+ * manipulating whole lists rather than single entries, as
+ * sometimes we already know the next/prev entries and we can
+ * generate better code by using them directly rather than
+ * using the generic single-entry routines.
+ */
+
+struct list_head {
+	struct list_head *next, *prev;
+};
+
+#define LIST_HEAD_INIT(name) { &(name), &(name) }
+
+#define LIST_HEAD(name) \
+	struct list_head name = LIST_HEAD_INIT(name)
+
+#define INIT_LIST_HEAD(ptr) do { \
+	(ptr)->next = (ptr); (ptr)->prev = (ptr); \
+} while (0)
+
+/*
+ * Insert a new entry between two known consecutive entries.
+ *
+ * This is only for internal list manipulation where we know
+ * the prev/next entries already!
+ */
+_INLINE_ void __list_add(struct list_head * add,
+	struct list_head * prev,
+	struct list_head * next)
+{
+	next->prev = add;
+	add->next = next;
+	add->prev = prev;
+	prev->next = add;
+}
+
+/**
+ * list_add - add a new entry
+ * @add:	new entry to be added
+ * @head:	list head to add it after
+ *
+ * Insert a new entry after the specified head.
+ * This is good for implementing stacks.
+ */
+_INLINE_ void list_add(struct list_head *add, struct list_head *head)
+{
+	__list_add(add, head, head->next);
+}
+
+/**
+ * list_add_tail - add a new entry
+ * @add:	new entry to be added
+ * @head:	list head to add it before
+ *
+ * Insert a new entry before the specified head.
+ * This is useful for implementing queues.
+ */
+_INLINE_ void list_add_tail(struct list_head *add, struct list_head *head)
+{
+	__list_add(add, head->prev, head);
+}
+
+/*
+ * Delete a list entry by making the prev/next entries
+ * point to each other.
+ *
+ * This is only for internal list manipulation where we know
+ * the prev/next entries already!
+ */
+_INLINE_ void __list_del(struct list_head * prev,
+				  struct list_head * next)
+{
+	next->prev = prev;
+	prev->next = next;
+}
+
+/**
+ * list_del - deletes entry from list.
+ * @entry:	the element to delete from the list.
+ *
+ * list_empty() on @entry does not return true after this, @entry is
+ * in an undefined state.
+ */
+_INLINE_ void list_del(struct list_head *entry)
+{
+	__list_del(entry->prev, entry->next);
+}
+
+/**
+ * list_del_init - deletes entry from list and reinitialize it.
+ * @entry:	the element to delete from the list.
+ */
+_INLINE_ void list_del_init(struct list_head *entry)
+{
+	__list_del(entry->prev, entry->next);
+	INIT_LIST_HEAD(entry);
+}
+
+/**
+ * list_empty - tests whether a list is empty
+ * @head:	the list to test.
+ */
+_INLINE_ int list_empty(struct list_head *head)
+{
+	return head->next == head;
+}
+
+/**
+ * list_splice - join two lists
+ * @list:	the new list to add.
+ * @head:	the place to add it in the first list.
+ */
+_INLINE_ void list_splice(struct list_head *list, struct list_head *head)
+{
+	struct list_head *first = list->next;
+
+	if (first != list) {
+		struct list_head *last = list->prev;
+		struct list_head *at = head->next;
+
+		first->prev = head;
+		head->next = first;
+
+		last->next = at;
+		at->prev = last;
+	}
+}
+
+/**
+ * list_entry - get the struct for this entry
+ * @ptr:	the &struct list_head pointer.
+ * @type:	the type of the struct this is embedded in.
+ * @member:	the name of the list_struct within the struct.
+ */
+#define list_entry(ptr, type, member) \
+	((type *)((char *)(ptr)-(unsigned long)(&((type *)0)->member)))
+
+/**
+ * list_for_each - iterate over elements in a list
+ * @pos:	the &struct list_head to use as a loop counter.
+ * @head:	the head for your list.
+ */
+#define list_for_each(pos, head) \
+	for (pos = (head)->next; pos != (head); pos = pos->next)
+
+/**
+ * list_for_each_safe - iterate over elements in a list, but don't dereference
+ *                      pos after the body is done (in case it is freed)
+ * @pos:	the &struct list_head to use as a loop counter.
+ * @pnext:	the &struct list_head to use as a pointer to the next item.
+ * @head:	the head for your list (not included in iteration).
+ */
+#define list_for_each_safe(pos, pnext, head) \
+	for (pos = (head)->next, pnext = pos->next; pos != (head); \
+	     pos = pnext, pnext = pos->next)
+
+#undef _INLINE_
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _BLKID_LIST_H */
diff --git a/e2fsprogs/blkid/llseek.c b/e2fsprogs/blkid/llseek.c
new file mode 100644
index 000000000..b5dde03cf
--- /dev/null
+++ b/e2fsprogs/blkid/llseek.c
@@ -0,0 +1,139 @@
+/*
+ * llseek.c -- stub calling the llseek system call
+ *
+ * Copyright (C) 1994, 1995, 1996, 1997 Theodore Ts'o.
+ *
+ * %Begin-Header%
+ * This file may be redistributed under the terms of the
+ * GNU Lesser General Public License.
+ * %End-Header%
+ */
+
+#if HAVE_SYS_TYPES_H
+#include <sys/types.h>
+#endif
+
+#if HAVE_ERRNO_H
+#include <errno.h>
+#endif
+#if HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+#ifdef __MSDOS__
+#include <io.h>
+#endif
+
+#include "blkidP.h"
+
+#ifdef __linux__
+
+#if defined(HAVE_LSEEK64) && defined(HAVE_LSEEK64_PROTOTYPE)
+
+#define my_llseek lseek64
+
+#elif defined(HAVE_LLSEEK)
+#include <syscall.h>
+
+#ifndef HAVE_LLSEEK_PROTOTYPE
+extern long long llseek(int fd, long long offset, int origin);
+#endif
+
+#define my_llseek llseek
+
+#else	/* ! HAVE_LLSEEK */
+
+#if defined(__alpha__) || defined(__ia64__)
+
+#define llseek lseek
+
+#else /* !__alpha__ && !__ia64__*/
+
+#include <linux/unistd.h>
+
+#ifndef __NR__llseek
+#define __NR__llseek            140
+#endif
+
+#ifndef __i386__
+static int _llseek(unsigned int, unsigned long, unsigned long,
+		   blkid_loff_t *, unsigned int);
+
+static _syscall5(int, _llseek, unsigned int, fd, unsigned long, offset_high,
+		 unsigned long, offset_low, blkid_loff_t *, result,
+		 unsigned int, origin)
+#endif
+
+static blkid_loff_t my_llseek(int fd, blkid_loff_t offset, int origin)
+{
+	blkid_loff_t result;
+	int retval;
+
+#ifndef __i386__
+	retval = _llseek(fd, ((unsigned long long) offset) >> 32,
+			 ((unsigned long long)offset) & 0xffffffff,
+			 &result, origin);
+#else
+	retval = syscall(__NR__llseek, fd, ((unsigned long long) offset) >> 32,
+			 ((unsigned long long)offset) & 0xffffffff,
+			 &result, origin);
+#endif
+	return (retval == -1 ? (blkid_loff_t) retval : result);
+}
+
+#endif	/* __alpha__ || __ia64__ */
+
+#endif /* HAVE_LLSEEK */
+
+blkid_loff_t blkid_llseek(int fd, blkid_loff_t offset, int whence)
+{
+	blkid_loff_t result;
+	static int do_compat = 0;
+
+	if ((sizeof(off_t) >= sizeof(blkid_loff_t)) ||
+	    (offset < ((blkid_loff_t) 1 << ((sizeof(off_t)*8) -1))))
+		return lseek(fd, (off_t) offset, whence);
+
+	if (do_compat) {
+		errno = EOVERFLOW;
+		return -1;
+	}
+
+	result = my_llseek(fd, offset, whence);
+	if (result == -1 && errno == ENOSYS) {
+		/*
+		 * Just in case this code runs on top of an old kernel
+		 * which does not support the llseek system call
+		 */
+		do_compat++;
+		errno = EOVERFLOW;
+	}
+	return result;
+}
+
+#else /* !linux */
+
+#ifndef EOVERFLOW
+#ifdef EXT2_ET_INVALID_ARGUMENT
+#define EOVERFLOW EXT2_ET_INVALID_ARGUMENT
+#else
+#define EOVERFLOW 112
+#endif
+#endif
+
+blkid_loff_t blkid_llseek(int fd, blkid_loff_t offset, int origin)
+{
+#if defined(HAVE_LSEEK64) && defined(HAVE_LSEEK64_PROTOTYPE)
+	return lseek64 (fd, offset, origin);
+#else
+	if ((sizeof(off_t) < sizeof(blkid_loff_t)) &&
+	    (offset >= ((blkid_loff_t) 1 << ((sizeof(off_t)*8) - 1)))) {
+		errno = EOVERFLOW;
+		return -1;
+	}
+	return lseek(fd, (off_t) offset, origin);
+#endif
+}
+
+#endif	/* linux */
+
+
diff --git a/e2fsprogs/blkid/probe.c b/e2fsprogs/blkid/probe.c
new file mode 100644
index 000000000..5fa37ad46
--- /dev/null
+++ b/e2fsprogs/blkid/probe.c
@@ -0,0 +1,704 @@
+/*
+ * probe.c - identify a block device by its contents, and return a dev
+ *           struct with the details
+ *
+ * Copyright (C) 1999 by Andries Brouwer
+ * Copyright (C) 1999, 2000, 2003 by Theodore Ts'o
+ * Copyright (C) 2001 by Andreas Dilger
+ *
+ * %Begin-Header%
+ * This file may be redistributed under the terms of the
+ * GNU Lesser General Public License.
+ * %End-Header%
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <sys/types.h>
+#ifdef HAVE_SYS_STAT_H
+#include <sys/stat.h>
+#endif
+#ifdef HAVE_SYS_MKDEV_H
+#include <sys/mkdev.h>
+#endif
+#ifdef HAVE_ERRNO_H
+#include <errno.h>
+#endif
+#include "blkidP.h"
+#include "uuid/uuid.h"
+#include "probe.h"
+
+/*
+ * This is a special case code to check for an MDRAID device.  We do
+ * this special since it requires checking for a superblock at the end
+ * of the device.
+ */
+static int check_mdraid(int fd, unsigned char *ret_uuid)
+{
+	struct mdp_superblock_s *md;
+	blkid_loff_t		offset;
+	char			buf[4096];
+	
+	if (fd < 0)
+		return -BLKID_ERR_PARAM;
+
+	offset = (blkid_get_dev_size(fd) & ~((blkid_loff_t)65535)) - 65536;
+
+	if (blkid_llseek(fd, offset, 0) < 0 ||
+	    read(fd, buf, 4096) != 4096)
+		return -BLKID_ERR_IO;
+
+	/* Check for magic number */
+	if (memcmp("\251+N\374", buf, 4))
+		return -BLKID_ERR_PARAM;
+
+	if (!ret_uuid)
+		return 0;
+	*ret_uuid = 0;
+
+	/* The MD UUID is not contiguous in the superblock, make it so */
+	md = (struct mdp_superblock_s *)buf;
+	if (md->set_uuid0 || md->set_uuid1 || md->set_uuid2 || md->set_uuid3) {
+		memcpy(ret_uuid, &md->set_uuid0, 4);
+		memcpy(ret_uuid, &md->set_uuid1, 12);
+	}
+	return 0;
+}
+
+static void set_uuid(blkid_dev dev, uuid_t uuid)
+{
+	char	str[37];
+
+	if (!uuid_is_null(uuid)) {
+		uuid_unparse(uuid, str);
+		blkid_set_tag(dev, "UUID", str, sizeof(str));
+	}
+}
+
+static void get_ext2_info(blkid_dev dev, unsigned char *buf)
+{
+	struct ext2_super_block *es = (struct ext2_super_block *) buf;
+	const char *label = 0;
+
+	DBG(DEBUG_PROBE, printf("ext2_sb.compat = %08X:%08X:%08X\n", 
+		   blkid_le32(es->s_feature_compat),
+		   blkid_le32(es->s_feature_incompat),
+		   blkid_le32(es->s_feature_ro_compat)));
+
+	if (strlen(es->s_volume_name))
+		label = es->s_volume_name;
+	blkid_set_tag(dev, "LABEL", label, sizeof(es->s_volume_name));
+
+	set_uuid(dev, es->s_uuid);
+}
+
+static int probe_ext3(int fd __BLKID_ATTR((unused)), 
+		      blkid_cache cache __BLKID_ATTR((unused)), 
+		      blkid_dev dev,
+		      struct blkid_magic *id, unsigned char *buf)
+{
+	struct ext2_super_block *es;
+
+	es = (struct ext2_super_block *)buf;
+
+	/* Distinguish between jbd and ext2/3 fs */
+	if (blkid_le32(es->s_feature_incompat) & 
+	    EXT3_FEATURE_INCOMPAT_JOURNAL_DEV)
+		return -BLKID_ERR_PARAM;
+
+	/* Distinguish between ext3 and ext2 */
+	if (!(blkid_le32(es->s_feature_compat) &
+	      EXT3_FEATURE_COMPAT_HAS_JOURNAL))
+		return -BLKID_ERR_PARAM;
+
+	get_ext2_info(dev, buf);
+
+	blkid_set_tag(dev, "SEC_TYPE", "ext2", sizeof("ext2"));
+
+	return 0;
+}
+
+static int probe_ext2(int fd __BLKID_ATTR((unused)), 
+		      blkid_cache cache __BLKID_ATTR((unused)), 
+		      blkid_dev dev,
+		      struct blkid_magic *id, unsigned char *buf)
+{
+	struct ext2_super_block *es;
+//	const char *sec_type = 0, *label = 0;
+
+	es = (struct ext2_super_block *)buf;
+
+	/* Distinguish between jbd and ext2/3 fs */
+	if (blkid_le32(es->s_feature_incompat) & 
+	    EXT3_FEATURE_INCOMPAT_JOURNAL_DEV)
+		return -BLKID_ERR_PARAM;
+
+	get_ext2_info(dev, buf);
+
+	return 0;
+}
+
+static int probe_jbd(int fd __BLKID_ATTR((unused)), 
+		     blkid_cache cache __BLKID_ATTR((unused)), 
+		     blkid_dev dev, 
+		     struct blkid_magic *id __BLKID_ATTR((unused)), 
+		     unsigned char *buf)
+{
+	struct ext2_super_block *es = (struct ext2_super_block *) buf;
+
+	if (!(blkid_le32(es->s_feature_incompat) &
+	      EXT3_FEATURE_INCOMPAT_JOURNAL_DEV))
+		return -BLKID_ERR_PARAM;
+
+	get_ext2_info(dev, buf);
+
+	return 0;
+}
+
+static int probe_vfat(int fd __BLKID_ATTR((unused)), 
+		      blkid_cache cache __BLKID_ATTR((unused)), 
+		      blkid_dev dev,
+		      struct blkid_magic *id __BLKID_ATTR((unused)), 
+		      unsigned char *buf)
+{
+	struct vfat_super_block *vs;
+	char serno[10];
+	const char *label = 0;
+	int label_len = 0;
+
+	vs = (struct vfat_super_block *)buf;
+
+	if (strncmp(vs->vs_label, "NO NAME", 7)) {
+		char *end = vs->vs_label + sizeof(vs->vs_label) - 1;
+
+		while (*end == ' ' && end >= vs->vs_label)
+			--end;
+		if (end >= vs->vs_label) {
+			label = vs->vs_label;
+			label_len = end - vs->vs_label + 1;
+		}
+	}
+
+	/* We can't just print them as %04X, because they are unaligned */
+	sprintf(serno, "%02X%02X-%02X%02X", vs->vs_serno[3], vs->vs_serno[2],
+		vs->vs_serno[1], vs->vs_serno[0]);
+	blkid_set_tag(dev, "LABEL", label, label_len);
+	blkid_set_tag(dev, "UUID", serno, sizeof(serno));
+
+	return 0;
+}
+
+static int probe_msdos(int fd __BLKID_ATTR((unused)), 
+		       blkid_cache cache __BLKID_ATTR((unused)), 
+		       blkid_dev dev,
+		       struct blkid_magic *id __BLKID_ATTR((unused)), 
+		       unsigned char *buf)
+{
+	struct msdos_super_block *ms = (struct msdos_super_block *) buf;
+	char serno[10];
+	const char *label = 0;
+	int label_len = 0;
+
+	if (strncmp(ms->ms_label, "NO NAME", 7)) {
+		char *end = ms->ms_label + sizeof(ms->ms_label) - 1;
+
+		while (*end == ' ' && end >= ms->ms_label)
+			--end;
+		if (end >= ms->ms_label) {
+			label = ms->ms_label;
+			label_len = end - ms->ms_label + 1;
+		}
+	}
+
+	/* We can't just print them as %04X, because they are unaligned */
+	sprintf(serno, "%02X%02X-%02X%02X", ms->ms_serno[3], ms->ms_serno[2],
+		ms->ms_serno[1], ms->ms_serno[0]);
+	blkid_set_tag(dev, "UUID", serno, 0);
+	blkid_set_tag(dev, "LABEL", label, label_len);
+	blkid_set_tag(dev, "SEC_TYPE", "msdos", sizeof("msdos"));
+
+	return 0;
+}
+
+static int probe_xfs(int fd __BLKID_ATTR((unused)), 
+		     blkid_cache cache __BLKID_ATTR((unused)), 
+		     blkid_dev dev,
+		     struct blkid_magic *id __BLKID_ATTR((unused)), 
+		     unsigned char *buf)
+{
+	struct xfs_super_block *xs;
+	const char *label = 0;
+
+	xs = (struct xfs_super_block *)buf;
+
+	if (strlen(xs->xs_fname))
+		label = xs->xs_fname;
+	blkid_set_tag(dev, "LABEL", label, sizeof(xs->xs_fname));
+	set_uuid(dev, xs->xs_uuid);
+	return 0;
+}
+
+static int probe_reiserfs(int fd __BLKID_ATTR((unused)), 
+			  blkid_cache cache __BLKID_ATTR((unused)), 
+			  blkid_dev dev,
+			  struct blkid_magic *id, unsigned char *buf)
+{
+	struct reiserfs_super_block *rs = (struct reiserfs_super_block *) buf;
+	unsigned int blocksize;
+	const char *label = 0;
+
+	blocksize = blkid_le16(rs->rs_blocksize);
+
+	/* If the superblock is inside the journal, we have the wrong one */
+	if (id->bim_kboff/(blocksize>>10) > blkid_le32(rs->rs_journal_block))
+		return -BLKID_ERR_BIG;
+
+	/* LABEL/UUID are only valid for later versions of Reiserfs v3.6. */
+	if (!strcmp(id->bim_magic, "ReIsEr2Fs") ||
+	    !strcmp(id->bim_magic, "ReIsEr3Fs")) {
+		if (strlen(rs->rs_label))
+			label = rs->rs_label;
+		set_uuid(dev, rs->rs_uuid);
+	}
+	blkid_set_tag(dev, "LABEL", label, sizeof(rs->rs_label));
+
+	return 0;
+}
+
+static int probe_jfs(int fd __BLKID_ATTR((unused)), 
+		     blkid_cache cache __BLKID_ATTR((unused)), 
+		     blkid_dev dev,
+		     struct blkid_magic *id __BLKID_ATTR((unused)), 
+		     unsigned char *buf)
+{
+	struct jfs_super_block *js;
+	const char *label = 0;
+
+	js = (struct jfs_super_block *)buf;
+
+	if (strlen((char *) js->js_label))
+		label = (char *) js->js_label;
+	blkid_set_tag(dev, "LABEL", label, sizeof(js->js_label));
+	set_uuid(dev, js->js_uuid);
+	return 0;
+}
+
+static int probe_romfs(int fd __BLKID_ATTR((unused)), 
+		       blkid_cache cache __BLKID_ATTR((unused)), 
+		       blkid_dev dev,
+		       struct blkid_magic *id __BLKID_ATTR((unused)), 
+		       unsigned char *buf)
+{
+	struct romfs_super_block *ros;
+	const char *label = 0;
+
+	ros = (struct romfs_super_block *)buf;
+
+	if (strlen((char *) ros->ros_volume))
+		label = (char *) ros->ros_volume;
+	blkid_set_tag(dev, "LABEL", label, 0);
+	return 0;
+}
+
+static int probe_swap0(int fd __BLKID_ATTR((unused)),
+		       blkid_cache cache __BLKID_ATTR((unused)),
+		       blkid_dev dev,
+		       struct blkid_magic *id __BLKID_ATTR((unused)),
+		       unsigned char *buf __BLKID_ATTR((unused)))
+{
+	blkid_set_tag(dev, "UUID", 0, 0);
+	blkid_set_tag(dev, "LABEL", 0, 0);
+	return 0;
+}
+
+static int probe_swap1(int fd,
+		       blkid_cache cache __BLKID_ATTR((unused)),
+		       blkid_dev dev,
+		       struct blkid_magic *id __BLKID_ATTR((unused)),
+		       unsigned char *buf __BLKID_ATTR((unused)))
+{
+	struct swap_id_block *sws;
+//	const char *label = 0;
+
+	probe_swap0(fd, cache, dev, id, buf);
+	/*
+	 * Version 1 swap headers are always located at offset of 1024
+	 * bytes, although the swap signature itself is located at the
+	 * end of the page (which may vary depending on hardware
+	 * pagesize).
+	 */
+	if (lseek(fd, 1024, SEEK_SET) < 0) return 1;
+	if (!(sws = (struct swap_id_block *)malloc(1024))) return 1;
+	if (read(fd, sws, 1024) != 1024) {
+		free(sws);
+		return 1;
+	}
+
+	/* arbitrary sanity check.. is there any garbage down there? */
+	if (sws->sws_pad[32] == 0 && sws->sws_pad[33] == 0)  {
+		if (sws->sws_volume[0])
+			blkid_set_tag(dev, "LABEL", sws->sws_volume, 
+				      sizeof(sws->sws_volume));
+		if (sws->sws_uuid[0])
+			set_uuid(dev, sws->sws_uuid);
+	}
+	free(sws);
+
+	return 0;
+}
+
+static const char
+*udf_magic[] = { "BEA01", "BOOT2", "CD001", "CDW02", "NSR02",
+		 "NSR03", "TEA01", 0 };
+
+static int probe_udf(int fd, blkid_cache cache __BLKID_ATTR((unused)), 
+		     blkid_dev dev __BLKID_ATTR((unused)),
+		       struct blkid_magic *id __BLKID_ATTR((unused)), 
+		     unsigned char *buf __BLKID_ATTR((unused)))
+{
+	int j, bs;
+	struct iso_volume_descriptor isosb;
+	const char ** m;
+
+	/* determine the block size by scanning in 2K increments
+	   (block sizes larger than 2K will be null padded) */
+	for (bs = 1; bs < 16; bs++) {
+		lseek(fd, bs*2048+32768, SEEK_SET);
+		if (read(fd, (char *)&isosb, sizeof(isosb)) != sizeof(isosb))
+			return 1;
+		if (isosb.id[0])
+			break;
+	}
+
+	/* Scan up to another 64 blocks looking for additional VSD's */
+	for (j = 1; j < 64; j++) {
+		if (j > 1) {
+			lseek(fd, j*bs*2048+32768, SEEK_SET);
+			if (read(fd, (char *)&isosb, sizeof(isosb))
+			    != sizeof(isosb))
+				return 1;
+		}
+		/* If we find NSR0x then call it udf:
+		   NSR01 for UDF 1.00
+		   NSR02 for UDF 1.50
+		   NSR03 for UDF 2.00 */
+		if (!strncmp(isosb.id, "NSR0", 4))
+			return 0;
+		for (m = udf_magic; *m; m++)
+			if (!strncmp(*m, isosb.id, 5))
+				break;
+		if (*m == 0)
+			return 1;
+	}
+	return 1;
+}
+
+static int probe_ocfs(int fd __BLKID_ATTR((unused)), 
+		      blkid_cache cache __BLKID_ATTR((unused)), 
+		      blkid_dev dev,
+		      struct blkid_magic *id __BLKID_ATTR((unused)), 
+		      unsigned char *buf)
+{
+	struct ocfs_volume_header ovh;
+	struct ocfs_volume_label ovl;
+	__u32 major;
+
+	memcpy(&ovh, buf, sizeof(ovh));
+	memcpy(&ovl, buf+512, sizeof(ovl));
+
+	major = ocfsmajor(ovh);
+	if (major == 1)
+		blkid_set_tag(dev,"SEC_TYPE","ocfs1",sizeof("ocfs1"));
+	else if (major >= 9)
+		blkid_set_tag(dev,"SEC_TYPE","ntocfs",sizeof("ntocfs"));
+	
+	blkid_set_tag(dev, "LABEL", ovl.label, ocfslabellen(ovl));
+	blkid_set_tag(dev, "MOUNT", ovh.mount, ocfsmountlen(ovh));
+	set_uuid(dev, ovl.vol_id);
+	return 0;
+}
+
+static int probe_ocfs2(int fd __BLKID_ATTR((unused)), 
+		       blkid_cache cache __BLKID_ATTR((unused)), 
+		       blkid_dev dev,
+		       struct blkid_magic *id __BLKID_ATTR((unused)), 
+		       unsigned char *buf)
+{
+	struct ocfs2_super_block *osb;
+
+	osb = (struct ocfs2_super_block *)buf;
+
+	blkid_set_tag(dev, "LABEL", osb->s_label, sizeof(osb->s_label));
+	set_uuid(dev, osb->s_uuid);
+	return 0;
+}
+
+static int probe_oracleasm(int fd __BLKID_ATTR((unused)), 
+			   blkid_cache cache __BLKID_ATTR((unused)), 
+			   blkid_dev dev,
+			   struct blkid_magic *id __BLKID_ATTR((unused)), 
+			   unsigned char *buf)
+{
+	struct oracle_asm_disk_label *dl;
+
+	dl = (struct oracle_asm_disk_label *)buf;
+
+	blkid_set_tag(dev, "LABEL", dl->dl_id, sizeof(dl->dl_id));
+	return 0;
+}
+
+/*
+ * BLKID_BLK_OFFS is at least as large as the highest bim_kboff defined
+ * in the type_array table below + bim_kbalign.
+ *
+ * When probing for a lot of magics, we handle everything in 1kB buffers so
+ * that we don't have to worry about reading each combination of block sizes.
+ */
+#define BLKID_BLK_OFFS	64	/* currently reiserfs */
+
+/*
+ * Various filesystem magics that we can check for.  Note that kboff and
+ * sboff are in kilobytes and bytes respectively.  All magics are in
+ * byte strings so we don't worry about endian issues.
+ */
+static struct blkid_magic type_array[] = {
+/*  type     kboff   sboff len  magic			probe */
+  { "oracleasm", 0,	32,  8, "ORCLDISK",		probe_oracleasm },
+  { "ntfs",      0,      3,  8, "NTFS    ",             0 },
+  { "jbd",	 1,   0x38,  2, "\123\357",		probe_jbd },
+  { "ext3",	 1,   0x38,  2, "\123\357",		probe_ext3 },
+  { "ext2",	 1,   0x38,  2, "\123\357",		probe_ext2 },
+  { "reiserfs",	 8,   0x34,  8, "ReIsErFs",		probe_reiserfs },
+  { "reiserfs", 64,   0x34,  9, "ReIsEr2Fs",		probe_reiserfs },
+  { "reiserfs", 64,   0x34,  9, "ReIsEr3Fs",		probe_reiserfs },
+  { "reiserfs", 64,   0x34,  8, "ReIsErFs",		probe_reiserfs },
+  { "reiserfs",	 8,	20,  8, "ReIsErFs",		probe_reiserfs },
+  { "vfat",      0,   0x52,  5, "MSWIN",                probe_vfat },
+  { "vfat",      0,   0x52,  8, "FAT32   ",             probe_vfat },
+  { "vfat",      0,   0x36,  5, "MSDOS",                probe_msdos },
+  { "vfat",      0,   0x36,  8, "FAT16   ",             probe_msdos },
+  { "vfat",      0,   0x36,  8, "FAT12   ",             probe_msdos },
+  { "minix",     1,   0x10,  2, "\177\023",             0 },
+  { "minix",     1,   0x10,  2, "\217\023",             0 },
+  { "minix",	 1,   0x10,  2, "\150\044",		0 },
+  { "minix",	 1,   0x10,  2, "\170\044",		0 },
+  { "vxfs",	 1,	 0,  4, "\365\374\001\245",	0 },
+  { "xfs",	 0,	 0,  4, "XFSB",			probe_xfs },
+  { "romfs",	 0,	 0,  8, "-rom1fs-",		probe_romfs },
+  { "bfs",	 0,	 0,  4, "\316\372\173\033",	0 },
+  { "cramfs",	 0,	 0,  4, "E=\315\034",		0 },
+  { "qnx4",	 0,	 4,  6, "QNX4FS",		0 },
+  { "udf",	32,	 1,  5, "BEA01",		probe_udf },
+  { "udf",	32,	 1,  5, "BOOT2",		probe_udf },
+  { "udf",	32,	 1,  5, "CD001",		probe_udf },
+  { "udf",	32,	 1,  5, "CDW02",		probe_udf },
+  { "udf",	32,	 1,  5, "NSR02",		probe_udf },
+  { "udf",	32,	 1,  5, "NSR03",		probe_udf },
+  { "udf",	32,	 1,  5, "TEA01",		probe_udf },
+  { "iso9660",	32,	 1,  5, "CD001",		0 },
+  { "iso9660",	32,	 9,  5, "CDROM",		0 },
+  { "jfs",	32,	 0,  4, "JFS1",			probe_jfs },
+  { "hfs",	 1,	 0,  2, "BD",			0 },
+  { "ufs",	 8,  0x55c,  4, "T\031\001\000",	0 },
+  { "hpfs",	 8,	 0,  4, "I\350\225\371",	0 },
+  { "sysv",	 0,  0x3f8,  4, "\020~\030\375",	0 },
+  { "swap",	 0,  0xff6, 10, "SWAP-SPACE",		probe_swap0 },
+  { "swap",	 0,  0xff6, 10, "SWAPSPACE2",		probe_swap1 },
+  { "swap",	 0, 0x1ff6, 10, "SWAP-SPACE",		probe_swap0 },
+  { "swap",	 0, 0x1ff6, 10, "SWAPSPACE2",		probe_swap1 },
+  { "swap",	 0, 0x3ff6, 10, "SWAP-SPACE",		probe_swap0 },
+  { "swap",	 0, 0x3ff6, 10, "SWAPSPACE2",		probe_swap1 },
+  { "swap",	 0, 0x7ff6, 10, "SWAP-SPACE",		probe_swap0 },
+  { "swap",	 0, 0x7ff6, 10, "SWAPSPACE2",		probe_swap1 },
+  { "swap",	 0, 0xfff6, 10, "SWAP-SPACE",		probe_swap0 },
+  { "swap",	 0, 0xfff6, 10, "SWAPSPACE2",		probe_swap1 },
+  { "ocfs",	 0,	 8,  9,	"OracleCFS",		probe_ocfs },
+  { "ocfs2",	 1,	 0,  6,	"OCFSV2",		probe_ocfs2 },
+  { "ocfs2",	 2,	 0,  6,	"OCFSV2",		probe_ocfs2 },
+  { "ocfs2",	 4,	 0,  6,	"OCFSV2",		probe_ocfs2 },
+  { "ocfs2",	 8,	 0,  6,	"OCFSV2",		probe_ocfs2 },
+  {   NULL,	 0,	 0,  0, NULL,			NULL }
+};
+
+/*
+ * Verify that the data in dev is consistent with what is on the actual
+ * block device (using the devname field only).  Normally this will be
+ * called when finding items in the cache, but for long running processes
+ * is also desirable to revalidate an item before use.
+ *
+ * If we are unable to revalidate the data, we return the old data and
+ * do not set the BLKID_BID_FL_VERIFIED flag on it.
+ */
+blkid_dev blkid_verify(blkid_cache cache, blkid_dev dev)
+{
+	struct blkid_magic *id;
+	unsigned char *bufs[BLKID_BLK_OFFS + 1], *buf;
+	const char *type;
+	struct stat st;
+	time_t diff, now;
+	int fd, idx;
+
+	if (!dev)
+		return NULL;
+
+	now = time(0);
+	diff = now - dev->bid_time;
+
+	if ((now < dev->bid_time) ||
+	    (diff < BLKID_PROBE_MIN) || 
+	    (dev->bid_flags & BLKID_BID_FL_VERIFIED &&
+	     diff < BLKID_PROBE_INTERVAL))
+		return dev;
+
+	DBG(DEBUG_PROBE,
+	    printf("need to revalidate %s (time since last check %lu)\n", 
+		   dev->bid_name, diff));
+
+	if (((fd = open(dev->bid_name, O_RDONLY)) < 0) ||
+	    (fstat(fd, &st) < 0)) {
+		if (errno == ENXIO || errno == ENODEV || errno == ENOENT) {
+			blkid_free_dev(dev);
+			return NULL;
+		}
+		/* We don't have read permission, just return cache data. */
+		DBG(DEBUG_PROBE,
+		    printf("returning unverified data for %s\n",
+			   dev->bid_name));
+		return dev;
+	}
+
+	memset(bufs, 0, sizeof(bufs));
+	
+	/*
+	 * Iterate over the type array.  If we already know the type,
+	 * then try that first.  If it doesn't work, then blow away
+	 * the type information, and try again.
+	 * 
+	 */
+try_again:
+	type = 0;
+	if (!dev->bid_type || !strcmp(dev->bid_type, "mdraid")) {
+		uuid_t	uuid;
+
+		if (check_mdraid(fd, uuid) == 0) {
+			set_uuid(dev, uuid);
+			type = "mdraid";
+			goto found_type;
+		}
+	}
+	for (id = type_array; id->bim_type; id++) {
+		if (dev->bid_type &&
+		    strcmp(id->bim_type, dev->bid_type))
+			continue;
+
+		idx = id->bim_kboff + (id->bim_sboff >> 10);
+		if (idx > BLKID_BLK_OFFS || idx < 0)
+			continue;
+		buf = bufs[idx];
+		if (!buf) {
+			if (lseek(fd, idx << 10, SEEK_SET) < 0)
+				continue;
+
+			if (!(buf = (unsigned char *)malloc(1024)))
+				continue;
+			
+			if (read(fd, buf, 1024) != 1024) {
+				free(buf);
+				continue;
+			}
+			bufs[idx] = buf;
+		}
+
+		if (memcmp(id->bim_magic, buf + (id->bim_sboff&0x3ff),
+			   id->bim_len))
+			continue;
+
+		if ((id->bim_probe == NULL) ||
+		    (id->bim_probe(fd, cache, dev, id, buf) == 0)) {
+			type = id->bim_type;
+			goto found_type;
+		}
+	}
+
+	if (!id->bim_type && dev->bid_type) {
+		/*
+		 * Zap the device filesystem type and try again
+		 */
+		blkid_set_tag(dev, "TYPE", 0, 0);
+		blkid_set_tag(dev, "SEC_TYPE", 0, 0);
+		blkid_set_tag(dev, "LABEL", 0, 0);
+		blkid_set_tag(dev, "UUID", 0, 0);
+		goto try_again;
+	}
+
+	if (!dev->bid_type) {
+		blkid_free_dev(dev);
+		return NULL;
+	}
+		
+found_type:
+	if (dev && type) {
+		dev->bid_devno = st.st_rdev;
+		dev->bid_time = time(0);
+		dev->bid_flags |= BLKID_BID_FL_VERIFIED;
+		cache->bic_flags |= BLKID_BIC_FL_CHANGED;
+
+		blkid_set_tag(dev, "TYPE", type, 0);
+				
+		DBG(DEBUG_PROBE, printf("%s: devno 0x%04Lx, type %s\n",
+			   dev->bid_name, st.st_rdev, type));
+	}
+
+	close(fd);
+
+	return dev;
+}
+
+int blkid_known_fstype(const char *fstype)
+{
+	struct blkid_magic *id;
+
+	for (id = type_array; id->bim_type; id++) {
+		if (strcmp(fstype, id->bim_type) == 0)
+			return 1;
+	}
+	return 0;
+}
+
+#ifdef TEST_PROGRAM
+int main(int argc, char **argv)
+{
+	blkid_dev dev;
+	blkid_cache cache;
+	int ret;
+
+	blkid_debug_mask = DEBUG_ALL;
+	if (argc != 2) {
+		fprintf(stderr, "Usage: %s device\n"
+			"Probe a single device to determine type\n", argv[0]);
+		exit(1);
+	}
+	if ((ret = blkid_get_cache(&cache, "/dev/null")) != 0) {
+		fprintf(stderr, "%s: error creating cache (%d)\n",
+			argv[0], ret);
+		exit(1);
+	}
+	dev = blkid_get_dev(cache, argv[1], BLKID_DEV_NORMAL);
+	if (!dev) {
+		printf("%s: %s has an unsupported type\n", argv[0], argv[1]);
+		return (1);
+	}
+	printf("%s is type %s\n", argv[1], dev->bid_type ?
+		dev->bid_type : "(null)");
+	if (dev->bid_label)
+		printf("\tlabel is '%s'\n", dev->bid_label);
+	if (dev->bid_uuid)
+		printf("\tuuid is %s\n", dev->bid_uuid);
+	
+	blkid_free_dev(dev);
+	return (0);
+}
+#endif
diff --git a/e2fsprogs/blkid/probe.h b/e2fsprogs/blkid/probe.h
new file mode 100644
index 000000000..85234e84f
--- /dev/null
+++ b/e2fsprogs/blkid/probe.h
@@ -0,0 +1,359 @@
+/*
+ * probe.h - constants and on-disk structures for extracting device data
+ *
+ * Copyright (C) 1999 by Andries Brouwer
+ * Copyright (C) 1999, 2000, 2003 by Theodore Ts'o
+ * Copyright (C) 2001 by Andreas Dilger
+ *
+ * %Begin-Header%
+ * This file may be redistributed under the terms of the
+ * GNU Lesser General Public License.
+ * %End-Header%
+ */
+
+#ifndef _BLKID_PROBE_H
+#define _BLKID_PROBE_H
+
+#include <linux/types.h>
+
+struct blkid_magic;
+
+typedef int (*blkid_probe_t)(int fd, blkid_cache cache, blkid_dev dev, 
+			     struct blkid_magic *id, unsigned char *buf);
+
+struct blkid_magic {
+	const char	*bim_type;	/* type name for this magic */
+	long		bim_kboff;	/* kilobyte offset of superblock */
+	unsigned	bim_sboff;	/* byte offset within superblock */
+	unsigned	bim_len;	/* length of magic */
+	const char	*bim_magic;	/* magic string */
+	blkid_probe_t	bim_probe;	/* probe function */
+};
+
+/*
+ * Structures for each of the content types we want to extract information
+ * from.  We do not necessarily need the magic field here, because we have
+ * already identified the content type before we get this far.  It may still
+ * be useful if there are probe functions which handle multiple content types.
+ */
+struct ext2_super_block {
+	__u32		s_inodes_count;
+	__u32		s_blocks_count;
+	__u32		s_r_blocks_count;
+	__u32		s_free_blocks_count;
+	__u32		s_free_inodes_count;
+	__u32		s_first_data_block;
+	__u32		s_log_block_size;
+	__u32		s_dummy3[7];
+	unsigned char	s_magic[2];
+	__u16		s_state;
+	__u32		s_dummy5[8];
+	__u32		s_feature_compat;
+	__u32		s_feature_incompat;
+	__u32		s_feature_ro_compat;
+	unsigned char   s_uuid[16];
+	char	   s_volume_name[16];
+};
+#define EXT3_FEATURE_COMPAT_HAS_JOURNAL		0x00000004
+#define EXT3_FEATURE_INCOMPAT_RECOVER		0x00000004
+#define EXT3_FEATURE_INCOMPAT_JOURNAL_DEV	0x00000008
+
+struct xfs_super_block {
+	unsigned char	xs_magic[4];
+	__u32		xs_blocksize;
+	__u64		xs_dblocks;
+	__u64		xs_rblocks;
+	__u32		xs_dummy1[2];
+	unsigned char	xs_uuid[16];
+	__u32		xs_dummy2[15];
+	char		xs_fname[12];
+	__u32		xs_dummy3[2];
+	__u64		xs_icount;
+	__u64		xs_ifree;
+	__u64		xs_fdblocks;
+};
+
+struct reiserfs_super_block {
+	__u32		rs_blocks_count;
+	__u32		rs_free_blocks;
+	__u32		rs_root_block;
+	__u32		rs_journal_block;
+	__u32		rs_journal_dev;
+	__u32		rs_orig_journal_size;
+	__u32		rs_dummy2[5];
+	__u16		rs_blocksize;
+	__u16		rs_dummy3[3];
+	unsigned char	rs_magic[12];
+	__u32		rs_dummy4[5];
+	unsigned char	rs_uuid[16];
+	char		rs_label[16];
+};
+
+struct jfs_super_block {
+	unsigned char	js_magic[4];
+	__u32		js_version;
+	__u64		js_size;
+	__u32		js_bsize;
+	__u32		js_dummy1;
+	__u32		js_pbsize;
+	__u32		js_dummy2[27];
+	unsigned char	js_uuid[16];
+	unsigned char	js_label[16];
+	unsigned char	js_loguuid[16];
+};
+
+struct romfs_super_block {
+	unsigned char	ros_magic[8];
+	__u32		ros_dummy1[2];
+	unsigned char	ros_volume[16];
+};
+
+struct swap_id_block {
+/*	unsigned char	sws_boot[1024]; */
+	__u32		sws_version;
+	__u32		sws_lastpage;
+	__u32		sws_nrbad;
+	unsigned char	sws_uuid[16];
+	unsigned char	sws_volume[16];
+	unsigned char	sws_pad[117];
+	__u32		sws_badpg;
+};
+
+/* Yucky misaligned values */
+struct vfat_super_block {
+/* 00*/	unsigned char	vs_ignored[3];
+/* 03*/	unsigned char	vs_sysid[8];
+/* 0b*/	unsigned char	vs_sector_size[2];
+/* 0d*/	__u8		vs_cluster_size;
+/* 0e*/	__u16		vs_reserved;
+/* 10*/	__u8		vs_fats;
+/* 11*/	unsigned char	vs_dir_entries[2];
+/* 13*/	unsigned char	vs_sectors[2];
+/* 15*/	unsigned char	vs_media;
+/* 16*/	__u16		vs_fat_length;
+/* 18*/	__u16		vs_secs_track;
+/* 1a*/	__u16		vs_heads;
+/* 1c*/	__u32		vs_hidden;
+/* 20*/	__u32		vs_total_sect;
+/* 24*/	__u32		vs_fat32_length;
+/* 28*/	__u16		vs_flags;
+/* 2a*/	__u8		vs_version[2];
+/* 2c*/	__u32		vs_root_cluster;
+/* 30*/	__u16		vs_insfo_sector;
+/* 32*/	__u16		vs_backup_boot;
+/* 34*/	__u16		vs_reserved2[6];
+/* 40*/	unsigned char	vs_unknown[3];
+/* 43*/	unsigned char	vs_serno[4];
+/* 47*/	char		vs_label[11];
+/* 52*/	unsigned char   vs_magic[8];
+/* 5a*/	unsigned char	vs_dummy2[164];
+/*1fe*/	unsigned char	vs_pmagic[2];
+};
+
+/* Yucky misaligned values */
+struct msdos_super_block {
+/* 00*/	unsigned char	ms_ignored[3];
+/* 03*/	unsigned char	ms_sysid[8];
+/* 0b*/	unsigned char	ms_sector_size[2];
+/* 0d*/	__u8		ms_cluster_size;
+/* 0e*/	__u16		ms_reserved;
+/* 10*/	__u8		ms_fats;
+/* 11*/	unsigned char	ms_dir_entries[2];
+/* 13*/	unsigned char	ms_sectors[2];
+/* 15*/	unsigned char	ms_media;
+/* 16*/	__u16		ms_fat_length;
+/* 18*/	__u16		ms_secs_track;
+/* 1a*/	__u16		ms_heads;
+/* 1c*/	__u32		ms_hidden;
+/* 20*/	__u32		ms_total_sect;
+/* 24*/	unsigned char	ms_unknown[3];
+/* 27*/	unsigned char	ms_serno[4];
+/* 2b*/	char		ms_label[11];
+/* 36*/	unsigned char   ms_magic[8];
+/* 3d*/	unsigned char	ms_dummy2[192];
+/*1fe*/	unsigned char	ms_pmagic[2];
+};
+
+struct minix_super_block {
+	__u16		ms_ninodes;
+	__u16		ms_nzones;
+	__u16		ms_imap_blocks;
+	__u16		ms_zmap_blocks;
+	__u16		ms_firstdatazone;
+	__u16		ms_log_zone_size;
+	__u32		ms_max_size;
+	unsigned char	ms_magic[2];
+	__u16		ms_state;
+	__u32		ms_zones;
+};
+
+struct mdp_superblock_s {
+	__u32 md_magic;
+	__u32 major_version;
+	__u32 minor_version;
+	__u32 patch_version;
+	__u32 gvalid_words;
+	__u32 set_uuid0;
+	__u32 ctime;
+	__u32 level;
+	__u32 size;
+	__u32 nr_disks;
+	__u32 raid_disks;
+	__u32 md_minor;
+	__u32 not_persistent;
+	__u32 set_uuid1;
+	__u32 set_uuid2;
+	__u32 set_uuid3;
+};
+
+struct hfs_super_block {
+	char	h_magic[2];
+	char	h_dummy[18];
+	__u32	h_blksize;
+};
+
+struct ocfs_volume_header {
+	unsigned char	minor_version[4];
+	unsigned char	major_version[4];
+	unsigned char	signature[128];
+	unsigned char  mount[128];
+	unsigned char  mount_len[2];
+};
+
+struct ocfs_volume_label {
+	unsigned char	disk_lock[48];
+	unsigned char	label[64];	
+	unsigned char	label_len[2];
+	unsigned char  vol_id[16];
+	unsigned char  vol_id_len[2];
+};
+
+#define ocfsmajor(o) ((__u32)o.major_version[0] \
+                   + (((__u32) o.major_version[1]) << 8) \
+                   + (((__u32) o.major_version[2]) << 16) \
+                   + (((__u32) o.major_version[3]) << 24))
+#define ocfslabellen(o)	((__u32)o.label_len[0] + (((__u32) o.label_len[1]) << 8))
+#define ocfsmountlen(o)	((__u32)o.mount_len[0] + (((__u32) o.mount_len[1])<<8))
+
+#define OCFS_MAGIC "OracleCFS"
+
+struct ocfs2_super_block {
+	unsigned char  signature[8];
+	unsigned char  s_dummy1[184];
+	unsigned char  s_dummy2[80];
+	unsigned char  s_label[64];
+	unsigned char  s_uuid[16];
+};
+
+#define OCFS2_MIN_BLOCKSIZE             512
+#define OCFS2_MAX_BLOCKSIZE             4096
+
+#define OCFS2_SUPER_BLOCK_BLKNO         2
+
+#define OCFS2_SUPER_BLOCK_SIGNATURE     "OCFSV2"
+
+struct oracle_asm_disk_label {
+	char dummy[32];
+	char dl_tag[8];
+	char dl_id[24];
+};
+
+#define ORACLE_ASM_DISK_LABEL_MARKED    "ORCLDISK"
+#define ORACLE_ASM_DISK_LABEL_OFFSET    32
+
+#define ISODCL(from, to) (to - from + 1)
+struct iso_volume_descriptor {
+	char type[ISODCL(1,1)]; /* 711 */
+	char id[ISODCL(2,6)];
+	char version[ISODCL(7,7)];
+	char data[ISODCL(8,2048)];
+};
+
+/*
+ * Byte swap functions
+ */
+#ifdef __GNUC__
+#define _INLINE_ static __inline__
+#else				/* For Watcom C */
+#define _INLINE_ static inline
+#endif
+
+static __u16 blkid_swab16(__u16 val);
+static __u32 blkid_swab32(__u32 val);
+static __u64 blkid_swab64(__u64 val);
+
+#if ((defined __GNUC__) && \
+     (defined(__i386__) || defined(__i486__) || defined(__i586__)))
+
+#define _BLKID_HAVE_ASM_BITOPS_
+
+_INLINE_ __u32 blkid_swab32(__u32 val)
+{
+#ifdef EXT2FS_REQUIRE_486
+	__asm__("bswap %0" : "=r" (val) : "0" (val));
+#else
+	__asm__("xchgb %b0,%h0\n\t"	/* swap lower bytes	*/
+		"rorl $16,%0\n\t"	/* swap words		*/
+		"xchgb %b0,%h0"		/* swap higher bytes	*/
+		:"=q" (val)
+		: "0" (val));
+#endif
+	return val;
+}
+
+_INLINE_ __u16 blkid_swab16(__u16 val)
+{
+	__asm__("xchgb %b0,%h0"		/* swap bytes		*/ \
+		: "=q" (val) \
+		:  "0" (val)); \
+		return val;
+}
+
+_INLINE_ __u64 blkid_swab64(__u64 val)
+{
+	return (blkid_swab32(val >> 32) |
+		(((__u64) blkid_swab32(val & 0xFFFFFFFFUL)) << 32));
+}
+#endif
+
+#if !defined(_BLKID_HAVE_ASM_BITOPS_)
+
+_INLINE_  __u16 blkid_swab16(__u16 val)
+{
+	return (val >> 8) | (val << 8);
+}
+
+_INLINE_ __u32 blkid_swab32(__u32 val)
+{
+	return ((val>>24) | ((val>>8)&0xFF00) |
+		((val<<8)&0xFF0000) | (val<<24));
+}
+
+_INLINE_ __u64 blkid_swab64(__u64 val)
+{
+	return (blkid_swab32(val >> 32) |
+		(((__u64) blkid_swab32(val & 0xFFFFFFFFUL)) << 32));
+}
+#endif 
+
+
+
+#if  __BYTE_ORDER == __BIG_ENDIAN
+#define blkid_le16(x) blkid_swab16(x)
+#define blkid_le32(x) blkid_swab32(x)
+#define blkid_le64(x) blkid_swab64(x)
+#define blkid_be16(x) (x)
+#define blkid_be32(x) (x)
+#define blkid_be64(x) (x)
+#else
+#define blkid_le16(x) (x)
+#define blkid_le32(x) (x)
+#define blkid_le64(x) (x)
+#define blkid_be16(x) blkid_swab16(x)
+#define blkid_be32(x) blkid_swab32(x)
+#define blkid_be64(x) blkid_swab64(x)
+#endif
+
+#undef _INLINE_
+
+#endif /* _BLKID_PROBE_H */
diff --git a/e2fsprogs/blkid/read.c b/e2fsprogs/blkid/read.c
new file mode 100644
index 000000000..358554cb5
--- /dev/null
+++ b/e2fsprogs/blkid/read.c
@@ -0,0 +1,459 @@
+/*
+ * read.c - read the blkid cache from disk, to avoid scanning all devices
+ *
+ * Copyright (C) 2001, 2003 Theodore Y. Ts'o
+ * Copyright (C) 2001 Andreas Dilger
+ *
+ * %Begin-Header%
+ * This file may be redistributed under the terms of the
+ * GNU Lesser General Public License.
+ * %End-Header%
+ */
+
+#include <stdio.h>
+#include <ctype.h>
+#include <string.h>
+#include <time.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <unistd.h>
+#if HAVE_ERRNO_H
+#include <errno.h>
+#endif
+
+#include "blkidP.h"
+#include "uuid/uuid.h"
+
+#ifdef HAVE_STRTOULL
+#define __USE_ISOC9X
+#define STRTOULL strtoull /* defined in stdlib.h if you try hard enough */
+#else
+/* FIXME: need to support real strtoull here */
+#define STRTOULL strtoul
+#endif
+
+#if HAVE_STDLIB_H
+#include <stdlib.h>
+#endif
+
+/*
+ * File format:
+ *
+ *	<device [<NAME="value"> ...]>device_name</device>
+ *
+ *	The following tags are required for each entry:
+ *	<ID="id">	unique (within this file) ID number of this device
+ *	<TIME="time">	(ascii time_t) time this entry was last read from disk
+ *	<TYPE="type">	(detected) type of filesystem/data for this partition
+ *
+ *	The following tags may be present, depending on the device contents
+ *	<LABEL="label">	(user supplied) label (volume name, etc)
+ *	<UUID="uuid">	(generated) universally unique identifier (serial no)
+ */
+
+static char *skip_over_blank(char *cp)
+{
+	while (*cp && isspace(*cp))
+		cp++;
+	return cp;
+}
+
+static char *skip_over_word(char *cp)
+{
+	char ch;
+
+	while ((ch = *cp)) {
+		/* If we see a backslash, skip the next character */
+		if (ch == '\\') {
+			cp++;
+			if (*cp == '\0')
+				break;
+			cp++;
+			continue;
+		}
+		if (isspace(ch) || ch == '<' || ch == '>')
+			break;
+		cp++;
+	}
+	return cp;
+}
+
+static char *strip_line(char *line)
+{
+	char	*p;
+
+	line = skip_over_blank(line);
+
+	p = line + strlen(line) - 1;
+
+	while (*line) {
+		if (isspace(*p))
+			*p-- = '\0';
+		else
+			break;
+	}
+
+	return line;
+}
+
+#if 0
+static char *parse_word(char **buf)
+{
+	char *word, *next;
+
+	word = *buf;
+	if (*word == '\0')
+		return NULL;
+
+	word = skip_over_blank(word);
+	next = skip_over_word(word);
+	if (*next) {
+		char *end = next - 1;
+		if (*end == '"' || *end == '\'')
+			*end = '\0';
+		*next++ = '\0';
+	}
+	*buf = next;
+
+	if (*word == '"' || *word == '\'')
+		word++;
+	return word;
+}
+#endif
+
+/*
+ * Start parsing a new line from the cache.
+ *
+ * line starts with "<device" return 1 -> continue parsing line
+ * line starts with "<foo", empty, or # return 0 -> skip line
+ * line starts with other, return -BLKID_ERR_CACHE -> error
+ */
+static int parse_start(char **cp)
+{
+	char *p;
+
+	p = strip_line(*cp);
+
+	/* Skip comment or blank lines.  We can't just NUL the first '#' char,
+	 * in case it is inside quotes, or escaped.
+	 */
+	if (*p == '\0' || *p == '#')
+		return 0;
+
+	if (!strncmp(p, "<device", 7)) {
+		DBG(DEBUG_READ, printf("found device header: %8s\n", p));
+		p += 7;
+
+		*cp = p;
+		return 1;
+	}
+
+	if (*p == '<')
+		return 0;
+
+	return -BLKID_ERR_CACHE;
+}
+
+/* Consume the remaining XML on the line (cosmetic only) */
+static int parse_end(char **cp)
+{
+	*cp = skip_over_blank(*cp);
+
+	if (!strncmp(*cp, "</device>", 9)) {
+		DBG(DEBUG_READ, printf("found device trailer %9s\n", *cp));
+		*cp += 9;
+		return 0;
+	}
+
+	return -BLKID_ERR_CACHE;
+}
+
+/*
+ * Allocate a new device struct with device name filled in.  Will handle
+ * finding the device on lines of the form:
+ * <device foo=bar>devname</device>
+ * <device>devname<foo>bar</foo></device>
+ */
+static int parse_dev(blkid_cache cache, blkid_dev *dev, char **cp)
+{
+	char *start, *tmp, *end, *name;
+	int ret;
+
+	if ((ret = parse_start(cp)) <= 0)
+		return ret;
+
+	start = tmp = strchr(*cp, '>');
+	if (!start) {
+		DBG(DEBUG_READ,
+		    printf("blkid: short line parsing dev: %s\n", *cp));
+		return -BLKID_ERR_CACHE;
+	}
+	start = skip_over_blank(start + 1);
+	end = skip_over_word(start);
+
+	DBG(DEBUG_READ, printf("device should be %*s\n", end - start, start));
+
+	if (**cp == '>')
+		*cp = end;
+	else
+		(*cp)++;
+
+	*tmp = '\0';
+
+	if (!(tmp = strrchr(end, '<')) || parse_end(&tmp) < 0) {
+		DBG(DEBUG_READ,
+		    printf("blkid: missing </device> ending: %s\n", end));
+	} else if (tmp)
+		*tmp = '\0';
+
+	if (end - start <= 1) {
+		DBG(DEBUG_READ, printf("blkid: empty device name: %s\n", *cp));
+		return -BLKID_ERR_CACHE;
+	}
+
+	name = blkid_strndup(start, end-start);
+	if (name == NULL)
+		return -BLKID_ERR_MEM;
+
+	DBG(DEBUG_READ, printf("found dev %s\n", name));
+
+	if (!(*dev = blkid_get_dev(cache, name, BLKID_DEV_CREATE)))
+		return -BLKID_ERR_MEM;
+
+	free(name);
+	return 1;
+}
+
+/*
+ * Extract a tag of the form NAME="value" from the line.
+ */
+static int parse_token(char **name, char **value, char **cp)
+{
+	char *end;
+
+	if (!name || !value || !cp)
+		return -BLKID_ERR_PARAM;
+
+	if (!(*value = strchr(*cp, '=')))
+		return 0;
+
+	**value = '\0';
+	*name = strip_line(*cp);
+	*value = skip_over_blank(*value + 1);
+
+	if (**value == '"') {
+		end = strchr(*value + 1, '"');
+		if (!end) {
+			DBG(DEBUG_READ,
+			    printf("unbalanced quotes at: %s\n", *value));
+			*cp = *value;
+			return -BLKID_ERR_CACHE;
+		}
+		(*value)++;
+		*end = '\0';
+		end++;
+	} else {
+		end = skip_over_word(*value);
+		if (*end) {
+			*end = '\0';
+			end++;
+		}
+	}
+	*cp = end;
+
+	return 1;
+}
+
+/*
+ * Extract a tag of the form <NAME>value</NAME> from the line.
+ */
+/*
+static int parse_xml(char **name, char **value, char **cp)
+{
+	char *end;
+
+	if (!name || !value || !cp)
+		return -BLKID_ERR_PARAM;
+
+	*name = strip_line(*cp);
+
+	if ((*name)[0] != '<' || (*name)[1] == '/')
+		return 0;
+
+	FIXME: finish this.
+}
+*/
+
+/*
+ * Extract a tag from the line.
+ *
+ * Return 1 if a valid tag was found.
+ * Return 0 if no tag found.
+ * Return -ve error code.
+ */
+static int parse_tag(blkid_cache cache, blkid_dev dev, char **cp)
+{
+	char *name;
+	char *value;
+	int ret;
+
+	if (!cache || !dev)
+		return -BLKID_ERR_PARAM;
+
+	if ((ret = parse_token(&name, &value, cp)) <= 0 /* &&
+	    (ret = parse_xml(&name, &value, cp)) <= 0 */)
+		return ret;
+
+	/* Some tags are stored directly in the device struct */
+	if (!strcmp(name, "DEVNO")) 
+		dev->bid_devno = STRTOULL(value, 0, 0);
+	else if (!strcmp(name, "PRI"))
+		dev->bid_pri = strtol(value, 0, 0);
+	else if (!strcmp(name, "TIME"))
+		/* FIXME: need to parse a long long eventually */
+		dev->bid_time = strtol(value, 0, 0);
+	else
+		ret = blkid_set_tag(dev, name, value, strlen(value));
+
+	DBG(DEBUG_READ, printf("    tag: %s=\"%s\"\n", name, value));
+
+	return ret < 0 ? ret : 1;
+}
+
+/*
+ * Parse a single line of data, and return a newly allocated dev struct.
+ * Add the new device to the cache struct, if one was read.
+ *
+ * Lines are of the form <device [TAG="value" ...]>/dev/foo</device>
+ *
+ * Returns -ve value on error.
+ * Returns 0 otherwise.
+ * If a valid device was read, *dev_p is non-NULL, otherwise it is NULL
+ * (e.g. comment lines, unknown XML content, etc).
+ */
+static int blkid_parse_line(blkid_cache cache, blkid_dev *dev_p, char *cp)
+{
+	blkid_dev dev;
+	int ret;
+
+	if (!cache || !dev_p)
+		return -BLKID_ERR_PARAM;
+
+	*dev_p = NULL;
+
+	DBG(DEBUG_READ, printf("line: %s\n", cp));
+
+	if ((ret = parse_dev(cache, dev_p, &cp)) <= 0)
+		return ret;
+
+	dev = *dev_p;
+
+	while ((ret = parse_tag(cache, dev, &cp)) > 0) {
+		;
+	}
+
+	if (dev->bid_type == NULL) {
+		DBG(DEBUG_READ,
+		    printf("blkid: device %s has no TYPE\n",dev->bid_name));
+		blkid_free_dev(dev);
+	}
+
+	DEB_DUMP_DEV(DEBUG_READ, dev);
+
+	return ret;
+}
+
+/*
+ * Parse the specified filename, and return the data in the supplied or
+ * a newly allocated cache struct.  If the file doesn't exist, return a
+ * new empty cache struct.
+ */
+void blkid_read_cache(blkid_cache cache)
+{
+	FILE *file;
+	char buf[4096];
+	int fd, lineno = 0;
+	struct stat st;
+
+	if (!cache)
+		return;
+
+	/*
+	 * If the file doesn't exist, then we just return an empty
+	 * struct so that the cache can be populated.
+	 */
+	if ((fd = open(cache->bic_filename, O_RDONLY)) < 0)
+		return;
+	if (fstat(fd, &st) < 0)
+		goto errout;
+	if ((st.st_mtime == cache->bic_ftime) ||
+	    (cache->bic_flags & BLKID_BIC_FL_CHANGED)) {
+		DBG(DEBUG_CACHE, printf("skipping re-read of %s\n",
+					cache->bic_filename));
+		goto errout;
+	}
+	
+	DBG(DEBUG_CACHE, printf("reading cache file %s\n",
+				cache->bic_filename));
+
+	file = fdopen(fd, "r");
+	if (!file)
+		goto errout;
+
+	while (fgets(buf, sizeof(buf), file)) {
+		blkid_dev dev;
+		unsigned int end;
+
+		lineno++;
+		if (buf[0] == 0)
+			continue;
+		end = strlen(buf) - 1;
+		/* Continue reading next line if it ends with a backslash */
+		while (buf[end] == '\\' && end < sizeof(buf) - 2 &&
+		       fgets(buf + end, sizeof(buf) - end, file)) {
+			end = strlen(buf) - 1;
+			lineno++;
+		}
+
+		if (blkid_parse_line(cache, &dev, buf) < 0) {
+			DBG(DEBUG_READ,
+			    printf("blkid: bad format on line %d\n", lineno));
+			continue;
+		}
+	}
+	fclose(file);
+
+	/*
+	 * Initially we do not need to write out the cache file.
+	 */
+	cache->bic_flags &= ~BLKID_BIC_FL_CHANGED;
+	cache->bic_ftime = st.st_mtime;
+
+	return;
+errout:
+	close(fd);
+	return;
+}
+
+#ifdef TEST_PROGRAM
+int main(int argc, char**argv)
+{
+	blkid_cache cache = NULL;
+	int ret;
+
+	blkid_debug_mask = DEBUG_ALL;
+	if (argc > 2) {
+		fprintf(stderr, "Usage: %s [filename]\n"
+			"Test parsing of the cache (filename)\n", argv[0]);
+		exit(1);
+	}
+	if ((ret = blkid_get_cache(&cache, argv[1])) < 0)
+		fprintf(stderr, "error %d reading cache file %s\n", ret,
+			argv[1] ? argv[1] : BLKID_CACHE_FILE);
+
+	blkid_put_cache(cache);
+
+	return ret;
+}
+#endif
diff --git a/e2fsprogs/blkid/resolve.c b/e2fsprogs/blkid/resolve.c
new file mode 100644
index 000000000..3dca74ff4
--- /dev/null
+++ b/e2fsprogs/blkid/resolve.c
@@ -0,0 +1,140 @@
+/*
+ * resolve.c - resolve names and tags into specific devices
+ *
+ * Copyright (C) 2001, 2003 Theodore Ts'o.
+ * Copyright (C) 2001 Andreas Dilger
+ *
+ * %Begin-Header%
+ * This file may be redistributed under the terms of the
+ * GNU Lesser General Public License.
+ * %End-Header%
+ */
+
+#include <stdio.h>
+#if HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+#include <stdlib.h>
+#include <fcntl.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include "blkidP.h"
+#include "probe.h"
+
+/*
+ * Find a tagname (e.g. LABEL or UUID) on a specific device.
+ */
+char *blkid_get_tag_value(blkid_cache cache, const char *tagname,
+			  const char *devname)
+{
+	blkid_tag found;
+	blkid_dev dev;
+	blkid_cache c = cache;
+	char *ret = NULL;
+
+	DBG(DEBUG_RESOLVE, printf("looking for %s on %s\n", tagname, devname));
+
+	if (!devname)
+		return NULL;
+
+	if (!cache) {
+		if (blkid_get_cache(&c, NULL) < 0)
+			return NULL;
+	}
+
+	if ((dev = blkid_get_dev(c, devname, BLKID_DEV_NORMAL)) &&
+	    (found = blkid_find_tag_dev(dev, tagname)))
+		ret = blkid_strdup(found->bit_val);
+
+	if (!cache)
+		blkid_put_cache(c);
+
+	return ret;
+}
+
+/*
+ * Locate a device name from a token (NAME=value string), or (name, value)
+ * pair.  In the case of a token, value is ignored.  If the "token" is not
+ * of the form "NAME=value" and there is no value given, then it is assumed
+ * to be the actual devname and a copy is returned.
+ */
+char *blkid_get_devname(blkid_cache cache, const char *token,
+			const char *value)
+{
+	blkid_dev dev;
+	blkid_cache c = cache;
+	char *t = 0, *v = 0;
+	char *ret = NULL;
+
+	if (!token)
+		return NULL;
+	
+	if (!cache) {
+		if (blkid_get_cache(&c, NULL) < 0)
+			return NULL;
+	}
+
+	DBG(DEBUG_RESOLVE,
+	    printf("looking for %s%s%s %s\n", token, value ? "=" : "",
+		   value ? value : "", cache ? "in cache" : "from disk"));
+
+	if (!value) {
+		if (!strchr(token, '='))
+			return blkid_strdup(token);
+		blkid_parse_tag_string(token, &t, &v);
+		if (!t || !v)
+			goto errout;
+		token = t;
+		value = v;
+	}
+
+	dev = blkid_find_dev_with_tag(c, token, value);
+	if (!dev)
+		goto errout;
+
+	ret = blkid_strdup(blkid_dev_devname(dev));
+
+errout:
+	if (t)
+		free(t);
+	if (v)
+		free(v);
+	if (!cache) {
+		blkid_put_cache(c);
+	}
+	return (ret);
+}
+
+#ifdef TEST_PROGRAM
+int main(int argc, char **argv)
+{
+	char *value;
+	blkid_cache cache;
+
+	blkid_debug_mask = DEBUG_ALL;
+	if (argc != 2 && argc != 3) {
+		fprintf(stderr, "Usage:\t%s tagname=value\n"
+			"\t%s tagname devname\n"
+			"Find which device holds a given token or\n"
+			"Find what the value of a tag is in a device\n",
+			argv[0], argv[0]);
+		exit(1);
+	}
+	if (blkid_get_cache(&cache, "/dev/null") < 0) {
+		fprintf(stderr, "Couldn't get blkid cache\n");
+		exit(1);
+	}
+	
+	if (argv[2]) {
+		value = blkid_get_tag_value(cache, argv[1], argv[2]);
+		printf("%s has tag %s=%s\n", argv[2], argv[1],
+		       value ? value : "<missing>");
+	} else {
+		value = blkid_get_devname(cache, argv[1], NULL);
+		printf("%s has tag %s\n", value ? value : "<none>", argv[1]);
+	}
+	blkid_put_cache(cache);
+	return value ? 0 : 1;
+}
+#endif
diff --git a/e2fsprogs/blkid/save.c b/e2fsprogs/blkid/save.c
new file mode 100644
index 000000000..a2fbd7b45
--- /dev/null
+++ b/e2fsprogs/blkid/save.c
@@ -0,0 +1,193 @@
+/*
+ * save.c - write the cache struct to disk
+ *
+ * Copyright (C) 2001 by Andreas Dilger
+ * Copyright (C) 2003 Theodore Ts'o
+ *
+ * %Begin-Header%
+ * This file may be redistributed under the terms of the
+ * GNU Lesser General Public License.
+ * %End-Header%
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <sys/types.h>
+#ifdef HAVE_SYS_STAT_H
+#include <sys/stat.h>
+#endif
+#ifdef HAVE_SYS_MKDEV_H
+#include <sys/mkdev.h>
+#endif
+#ifdef HAVE_ERRNO_H
+#include <errno.h>
+#endif
+#include "blkidP.h"
+
+static int save_dev(blkid_dev dev, FILE *file)
+{
+	struct list_head *p;
+
+	if (!dev || dev->bid_name[0] != '/')
+		return 0;
+
+	DBG(DEBUG_SAVE,
+	    printf("device %s, type %s\n", dev->bid_name, dev->bid_type));
+
+	fprintf(file,
+		"<device DEVNO=\"0x%04lx\" TIME=\"%lu\"",
+		(unsigned long) dev->bid_devno, dev->bid_time);
+	if (dev->bid_pri)
+		fprintf(file, " PRI=\"%d\"", dev->bid_pri);
+	list_for_each(p, &dev->bid_tags) {
+		blkid_tag tag = list_entry(p, struct blkid_struct_tag, bit_tags);
+		fprintf(file, " %s=\"%s\"", tag->bit_name,tag->bit_val);
+	}
+	fprintf(file, ">%s</device>\n", dev->bid_name);
+
+	return 0;
+}
+
+/*
+ * Write out the cache struct to the cache file on disk.
+ */
+int blkid_flush_cache(blkid_cache cache)
+{
+	struct list_head *p;
+	char *tmp = NULL;
+	const char *opened = NULL;
+	const char *filename;
+	FILE *file = NULL;
+	int fd, ret = 0;
+	struct stat st;
+
+	if (!cache)
+		return -BLKID_ERR_PARAM;
+
+	if (list_empty(&cache->bic_devs) ||
+	    !(cache->bic_flags & BLKID_BIC_FL_CHANGED)) {
+		DBG(DEBUG_SAVE, printf("skipping cache file write\n"));
+		return 0;
+	}
+
+	filename = cache->bic_filename ? cache->bic_filename: BLKID_CACHE_FILE;
+
+	/* If we can't write to the cache file, then don't even try */
+	if (((ret = stat(filename, &st)) < 0 && errno != ENOENT) ||
+	    (ret == 0 && access(filename, W_OK) < 0)) {
+		DBG(DEBUG_SAVE,
+		    printf("can't write to cache file %s\n", filename));
+		return 0;
+	}
+
+	/*
+	 * Try and create a temporary file in the same directory so
+	 * that in case of error we don't overwrite the cache file.
+	 * If the cache file doesn't yet exist, it isn't a regular
+	 * file (e.g. /dev/null or a socket), or we couldn't create
+	 * a temporary file then we open it directly.
+	 */
+	if (ret == 0 && S_ISREG(st.st_mode)) {
+		tmp = malloc(strlen(filename) + 8);
+		if (tmp) {
+			sprintf(tmp, "%s-XXXXXX", filename);
+			fd = mkstemp(tmp);
+			if (fd >= 0) {
+				file = fdopen(fd, "w");
+				opened = tmp;
+			}
+			fchmod(fd, 0644);
+		}
+	}
+
+	if (!file) {
+		file = fopen(filename, "w");
+		opened = filename;
+	}
+
+	DBG(DEBUG_SAVE,
+	    printf("writing cache file %s (really %s)\n",
+		   filename, opened));
+
+	if (!file) {
+		ret = errno;
+		goto errout;
+	}
+
+	list_for_each(p, &cache->bic_devs) {
+		blkid_dev dev = list_entry(p, struct blkid_struct_dev, bid_devs);
+		if (!dev->bid_type)
+			continue;
+		if ((ret = save_dev(dev, file)) < 0)
+			break;
+	}
+
+	if (ret >= 0) {
+		cache->bic_flags &= ~BLKID_BIC_FL_CHANGED;
+		ret = 1;
+	}
+
+	fclose(file);
+	if (opened != filename) {
+		if (ret < 0) {
+			unlink(opened);
+			DBG(DEBUG_SAVE,
+			    printf("unlinked temp cache %s\n", opened));
+		} else {
+			char *backup;
+
+			backup = malloc(strlen(filename) + 5);
+			if (backup) {
+				sprintf(backup, "%s.old", filename);
+				unlink(backup);
+				link(filename, backup);
+				free(backup);
+			}
+			rename(opened, filename);
+			DBG(DEBUG_SAVE,
+			    printf("moved temp cache %s\n", opened));
+		}
+	}
+
+errout:
+	if (tmp)
+		free(tmp);
+	return ret;
+}
+
+#ifdef TEST_PROGRAM
+int main(int argc, char **argv)
+{
+	blkid_cache cache = NULL;
+	int ret;
+
+	blkid_debug_mask = DEBUG_ALL;
+	if (argc > 2) {
+		fprintf(stderr, "Usage: %s [filename]\n"
+			"Test loading/saving a cache (filename)\n", argv[0]);
+		exit(1);
+	}
+
+	if ((ret = blkid_get_cache(&cache, "/dev/null")) != 0) {
+		fprintf(stderr, "%s: error creating cache (%d)\n",
+			argv[0], ret);
+		exit(1);
+	}
+	if ((ret = blkid_probe_all(cache)) < 0) {
+		fprintf(stderr, "error (%d) probing devices\n", ret);
+		exit(1);
+	}
+	cache->bic_filename = blkid_strdup(argv[1]);
+	
+	if ((ret = blkid_flush_cache(cache)) < 0) {
+		fprintf(stderr, "error (%d) saving cache\n", ret);
+		exit(1);
+	}
+
+	blkid_put_cache(cache);
+
+	return ret;
+}
+#endif
diff --git a/e2fsprogs/blkid/tag.c b/e2fsprogs/blkid/tag.c
new file mode 100644
index 000000000..63e5e7b4d
--- /dev/null
+++ b/e2fsprogs/blkid/tag.c
@@ -0,0 +1,340 @@
+/*
+ * tag.c - allocation/initialization/free routines for tag structs
+ *
+ * Copyright (C) 2001 Andreas Dilger
+ * Copyright (C) 2003 Theodore Ts'o
+ *
+ * %Begin-Header%
+ * This file may be redistributed under the terms of the
+ * GNU Lesser General Public License.
+ * %End-Header%
+ */
+
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+
+#include "blkidP.h"
+
+static blkid_tag blkid_new_tag(void)
+{
+	blkid_tag tag;
+
+	if (!(tag = (blkid_tag) calloc(1, sizeof(struct blkid_struct_tag))))
+		return NULL;
+
+	INIT_LIST_HEAD(&tag->bit_tags);
+	INIT_LIST_HEAD(&tag->bit_names);
+
+	return tag;
+}
+
+void blkid_free_tag(blkid_tag tag)
+{
+	if (!tag)
+		return;
+
+	DBG(DEBUG_TAG, printf("    freeing tag %s=%s\n", tag->bit_name,
+		   tag->bit_val ? tag->bit_val : "(NULL)"));
+	DEB_DUMP_TAG(DEBUG_TAG, tag);
+
+	list_del(&tag->bit_tags);	/* list of tags for this device */
+	list_del(&tag->bit_names);	/* list of tags with this type */
+
+	if (tag->bit_name)
+		free(tag->bit_name);
+	if (tag->bit_val)
+		free(tag->bit_val);
+
+	free(tag);
+}
+
+/*
+ * Find the desired tag on a device.  If value is NULL, then the
+ * first such tag is returned, otherwise return only exact tag if found.
+ */
+blkid_tag blkid_find_tag_dev(blkid_dev dev, const char *type)
+{
+	struct list_head *p;
+
+	if (!dev || !type)
+		return NULL;
+
+	list_for_each(p, &dev->bid_tags) {
+		blkid_tag tmp = list_entry(p, struct blkid_struct_tag,
+					   bit_tags);
+
+		if (!strcmp(tmp->bit_name, type))
+			return tmp;
+	}
+	return NULL;
+}
+
+/*
+ * Find the desired tag type in the cache.
+ * We return the head tag for this tag type.
+ */
+static blkid_tag blkid_find_head_cache(blkid_cache cache, const char *type)
+{
+	blkid_tag head = NULL, tmp;
+	struct list_head *p;
+
+	if (!cache || !type)
+		return NULL;
+
+	list_for_each(p, &cache->bic_tags) {
+		tmp = list_entry(p, struct blkid_struct_tag, bit_tags);
+		if (!strcmp(tmp->bit_name, type)) {
+			DBG(DEBUG_TAG,
+			    printf("    found cache tag head %s\n", type));
+			head = tmp;
+			break;
+		}
+	}
+	return head;
+}
+
+/*
+ * Set a tag on an existing device.
+ * 
+ * If value is NULL, then delete the tagsfrom the device.
+ */
+int blkid_set_tag(blkid_dev dev, const char *name,
+		  const char *value, const int vlength)
+{
+	blkid_tag	t = 0, head = 0;
+	char		*val = 0;
+
+	if (!dev || !name)
+		return -BLKID_ERR_PARAM;
+
+	if (!(val = blkid_strndup(value, vlength)) && value)
+		return -BLKID_ERR_MEM;
+	t = blkid_find_tag_dev(dev, name);
+	if (!value) {
+		if (t)
+			blkid_free_tag(t);
+	} else if (t) {
+		if (!strcmp(t->bit_val, val)) {
+			/* Same thing, exit */
+			free(val);
+			return 0;
+		}
+		free(t->bit_val);
+		t->bit_val = val;
+	} else {
+		/* Existing tag not present, add to device */
+		if (!(t = blkid_new_tag()))
+			goto errout;
+		t->bit_name = blkid_strdup(name);
+		t->bit_val = val;
+		t->bit_dev = dev;
+
+		list_add_tail(&t->bit_tags, &dev->bid_tags);
+		
+		if (dev->bid_cache) {
+			head = blkid_find_head_cache(dev->bid_cache,
+						     t->bit_name);
+			if (!head) {
+				head = blkid_new_tag();
+				if (!head)
+					goto errout;
+
+				DBG(DEBUG_TAG,
+				    printf("    creating new cache tag head %s\n", name));
+				head->bit_name = blkid_strdup(name);
+				if (!head->bit_name)
+					goto errout;
+				list_add_tail(&head->bit_tags,
+					      &dev->bid_cache->bic_tags);
+			}
+			list_add_tail(&t->bit_names, &head->bit_names);
+		}
+	}
+	
+	/* Link common tags directly to the device struct */
+	if (!strcmp(name, "TYPE"))
+		dev->bid_type = val;
+	else if (!strcmp(name, "LABEL"))
+		dev->bid_label = val;
+	else if (!strcmp(name, "UUID"))
+		dev->bid_uuid = val;
+		
+	if (dev->bid_cache)
+		dev->bid_cache->bic_flags |= BLKID_BIC_FL_CHANGED;
+	return 0;
+
+errout:
+	if (t)
+		blkid_free_tag(t);
+	else if (val)
+		free(val);
+	if (head)
+		blkid_free_tag(head);
+	return -BLKID_ERR_MEM;
+}
+
+
+/*
+ * Parse a "NAME=value" string.  This is slightly different than
+ * parse_token, because that will end an unquoted value at a space, while
+ * this will assume that an unquoted value is the rest of the token (e.g.
+ * if we are passed an already quoted string from the command-line we don't
+ * have to both quote and escape quote so that the quotes make it to
+ * us).
+ *
+ * Returns 0 on success, and -1 on failure.
+ */
+int blkid_parse_tag_string(const char *token, char **ret_type, char **ret_val)
+{
+	char *name, *value, *cp;
+
+	DBG(DEBUG_TAG, printf("trying to parse '%s' as a tag\n", token));
+
+	if (!token || !(cp = strchr(token, '=')))
+		return -1;
+
+	name = blkid_strdup(token);
+	if (!name)
+		return -1;
+	value = name + (cp - token);
+	*value++ = '\0';
+	if (*value == '"' || *value == '\'') {
+		char c = *value++;
+		if (!(cp = strrchr(value, c)))
+			goto errout; /* missing closing quote */
+		*cp = '\0';
+	}
+	value = blkid_strdup(value);
+	if (!value)
+		goto errout;
+
+	*ret_type = name;
+	*ret_val = value;
+
+	return 0;
+
+errout:
+	free(name);
+	return -1;
+}
+
+/*
+ * Tag iteration routines for the public libblkid interface.
+ *
+ * These routines do not expose the list.h implementation, which are a
+ * contamination of the namespace, and which force us to reveal far, far
+ * too much of our internal implemenation.  I'm not convinced I want
+ * to keep list.h in the long term, anyway.  It's fine for kernel
+ * programming, but performance is not the #1 priority for this
+ * library, and I really don't like the tradeoff of type-safety for
+ * performance for this application.  [tytso:20030125.2007EST]
+ */
+
+/*
+ * This series of functions iterate over all tags in a device
+ */
+#define TAG_ITERATE_MAGIC	0x01a5284c
+	
+struct blkid_struct_tag_iterate {
+	int			magic;
+	blkid_dev		dev;
+	struct list_head	*p;
+};
+
+extern blkid_tag_iterate blkid_tag_iterate_begin(blkid_dev dev)
+{
+	blkid_tag_iterate	iter;
+
+	iter = malloc(sizeof(struct blkid_struct_tag_iterate));
+	if (iter) {
+		iter->magic = TAG_ITERATE_MAGIC;
+		iter->dev = dev;
+		iter->p	= dev->bid_tags.next;
+	}
+	return (iter);
+}
+
+/*
+ * Return 0 on success, -1 on error
+ */
+extern int blkid_tag_next(blkid_tag_iterate iter,
+			  const char **type, const char **value)
+{
+	blkid_tag tag;
+	
+	*type = 0;
+	*value = 0;
+	if (!iter || iter->magic != TAG_ITERATE_MAGIC ||
+	    iter->p == &iter->dev->bid_tags)
+		return -1;
+	tag = list_entry(iter->p, struct blkid_struct_tag, bit_tags);
+	*type = tag->bit_name;
+	*value = tag->bit_val;
+	iter->p = iter->p->next;
+	return 0;
+}
+
+extern void blkid_tag_iterate_end(blkid_tag_iterate iter)
+{
+	if (!iter || iter->magic != TAG_ITERATE_MAGIC)
+		return;
+	iter->magic = 0;
+	free(iter);
+}
+
+/*
+ * This function returns a device which matches a particular
+ * type/value pair.  If there is more than one device that matches the
+ * search specification, it returns the one with the highest priority
+ * value.  This allows us to give preference to EVMS or LVM devices.
+ *
+ * XXX there should also be an interface which uses an iterator so we
+ * can get all of the devices which match a type/value search parameter.
+ */
+extern blkid_dev blkid_find_dev_with_tag(blkid_cache cache,
+					 const char *type,
+					 const char *value)
+{
+	blkid_tag	head;
+	blkid_dev	dev;
+	int		pri;
+	struct list_head *p;
+
+	if (!cache || !type || !value)
+		return NULL;
+
+	blkid_read_cache(cache);
+	
+	DBG(DEBUG_TAG, printf("looking for %s=%s in cache\n", type, value));
+	
+try_again:
+	pri = -1;
+	dev = 0;
+	head = blkid_find_head_cache(cache, type);
+
+	if (head) {
+		list_for_each(p, &head->bit_names) {
+			blkid_tag tmp = list_entry(p, struct blkid_struct_tag, 
+						   bit_names);
+
+			if (!strcmp(tmp->bit_val, value) &&
+			    tmp->bit_dev->bid_pri > pri) {
+				dev = tmp->bit_dev;
+				pri = dev->bid_pri;
+			}
+		}
+	}
+	if (dev && !(dev->bid_flags & BLKID_BID_FL_VERIFIED)) {
+		dev = blkid_verify(cache, dev);
+		if (dev && (dev->bid_flags & BLKID_BID_FL_VERIFIED))
+			goto try_again;
+	}
+
+	if (!dev && !(cache->bic_flags & BLKID_BIC_FL_PROBED)) {
+		if (blkid_probe_all(cache) < 0)
+			return NULL;
+		goto try_again;
+	}
+	return dev;
+}
diff --git a/e2fsprogs/blkid/version.c b/e2fsprogs/blkid/version.c
new file mode 100644
index 000000000..772291641
--- /dev/null
+++ b/e2fsprogs/blkid/version.c
@@ -0,0 +1,49 @@
+/*
+ * version.c --- Return the version of the blkid library
+ *
+ * Copyright (C) 2004 Theodore Ts'o.
+ *
+ * %Begin-Header%
+ * This file may be redistributed under the terms of the GNU Public
+ * License.
+ * %End-Header%
+ */
+
+#if HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+#include <string.h>
+#include <stdio.h>
+#include <ctype.h>
+
+#include "blkid.h"
+#include "../../version.h"
+
+static const char *lib_version = E2FSPROGS_VERSION;
+static const char *lib_date = E2FSPROGS_DATE;
+
+int blkid_parse_version_string(const char *ver_string)
+{
+	const char *cp;
+	int version = 0;
+
+	for (cp = ver_string; *cp; cp++) {
+		if (*cp == '.')
+			continue;
+		if (!isdigit(*cp))
+			break;
+		version = (version * 10) + (*cp - '0');
+	}
+	return version;
+}
+
+int blkid_get_library_version(const char **ver_string,
+			       const char **date_string)
+{
+	if (ver_string)
+		*ver_string = lib_version;
+	if (date_string)
+		*date_string = lib_date;
+
+	return blkid_parse_version_string(lib_version);
+}