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Current Path : /usr/include/blkid/
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Current File : //usr/include/blkid/blkid.h

/*
 * blkid.h - Interface for libblkid, a library to identify block devices
 *
 * Copyright (C) 2001 Andreas Dilger
 * Copyright (C) 2003 Theodore Ts'o
 * Copyright (C) 2008 Karel Zak <kzak@redhat.com>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 */

#ifndef _BLKID_BLKID_H
#define _BLKID_BLKID_H

#include <stdint.h>
#include <sys/types.h>

#ifdef __cplusplus
extern "C" {
#endif

#define BLKID_VERSION   "2.37.4"
#define BLKID_DATE      "14-Feb-2022"

/**
 * blkid_dev:
 *
 * The device object keeps information about one device
 */
typedef struct blkid_struct_dev *blkid_dev;

/**
 * blkid_cache:
 *
 * information about all system devices
 */
typedef struct blkid_struct_cache *blkid_cache;

/**
 * blkid_probe:
 *
 * low-level probing setting
 */
typedef struct blkid_struct_probe *blkid_probe;

/**
 * blkid_topology:
 *
 * device topology information
 */
typedef struct blkid_struct_topology *blkid_topology;

/**
 * blkid_partlist
 *
 * list of all detected partitions and partitions tables
 */
typedef struct blkid_struct_partlist *blkid_partlist;

/**
 * blkid_partition:
 *
 * information about a partition
 */
typedef struct blkid_struct_partition *blkid_partition;

/**
 * blkid_parttable:
 *
 * information about a partition table
 */
typedef struct blkid_struct_parttable *blkid_parttable;

/**
 * blkid_loff_t:
 *
 * 64-bit signed number for offsets and sizes
 */
typedef int64_t blkid_loff_t;

/**
 * blkid_tag_iterate:
 *
 * tags iterator for high-level (blkid_cache) API
 */
typedef struct blkid_struct_tag_iterate *blkid_tag_iterate;

/**
 * blkid_dev_iterate:
 *
 * devices iterator for high-level (blkid_cache) API
 */
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)


#ifndef __GNUC_PREREQ
# if defined __GNUC__ && defined __GNUC_MINOR__
#  define __GNUC_PREREQ(maj, min)  ((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min))
# else
#  define __GNUC_PREREQ(maj, min) 0
# endif
#endif

#ifndef __ul_attribute__
# if __GNUC_PREREQ (3, 4)
#  define __ul_attribute__(_a_) __attribute__(_a_)
# else
#  define __ul_attribute__(_a_)
# endif
#endif

/* init.c */
extern void blkid_init_debug(int mask);

/* cache.c */
extern void blkid_put_cache(blkid_cache cache);
extern int blkid_get_cache(blkid_cache *cache, const char *filename);
extern void blkid_gc_cache(blkid_cache cache);

/* dev.c */
extern const char *blkid_dev_devname(blkid_dev dev)
			__ul_attribute__((warn_unused_result));

extern blkid_dev_iterate blkid_dev_iterate_begin(blkid_cache cache);
extern int blkid_dev_set_search(blkid_dev_iterate iter,
				const char *search_type, const char *search_value);
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)
			__ul_attribute__((warn_unused_result));
extern int blkid_devno_to_wholedisk(dev_t dev, char *diskname,
                        size_t len, dev_t *diskdevno)
			__ul_attribute__((warn_unused_result));

/* devname.c */
extern int blkid_probe_all(blkid_cache cache);
extern int blkid_probe_all_new(blkid_cache cache);
extern int blkid_probe_all_removable(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);

/* verify.c */
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)
			__ul_attribute__((warn_unused_result));
extern char *blkid_get_devname(blkid_cache cache, const char *token,
			       const char *value)
			__ul_attribute__((warn_unused_result));

/* 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 int blkid_dev_has_tag(blkid_dev dev, const char *type, const char *value);

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)
			__ul_attribute__((nonnull));
extern int blkid_get_library_version(const char **ver_string,
				     const char **date_string);

/* encode.c */
extern int blkid_encode_string(const char *str, char *str_enc, size_t len);
extern int blkid_safe_string(const char *str, char *str_safe, size_t len);

/* evaluate.c */
extern int blkid_send_uevent(const char *devname, const char *action);
extern char *blkid_evaluate_tag(const char *token, const char *value,
				blkid_cache *cache)
			__ul_attribute__((warn_unused_result));
extern char *blkid_evaluate_spec(const char *spec, blkid_cache *cache)
			__ul_attribute__((warn_unused_result));

/* probe.c */
extern blkid_probe blkid_new_probe(void)
			__ul_attribute__((warn_unused_result));
extern blkid_probe blkid_new_probe_from_filename(const char *filename)
			__ul_attribute__((warn_unused_result))
			__ul_attribute__((nonnull));
extern void blkid_free_probe(blkid_probe pr);

extern void blkid_reset_probe(blkid_probe pr);
extern int blkid_probe_reset_buffers(blkid_probe pr);
extern int blkid_probe_hide_range(blkid_probe pr, uint64_t off, uint64_t len);

extern int blkid_probe_set_device(blkid_probe pr, int fd,
	                blkid_loff_t off, blkid_loff_t size)
			__ul_attribute__((nonnull));

extern dev_t blkid_probe_get_devno(blkid_probe pr)
			__ul_attribute__((nonnull));

extern dev_t blkid_probe_get_wholedisk_devno(blkid_probe pr)
			__ul_attribute__((nonnull));

extern int blkid_probe_is_wholedisk(blkid_probe pr)
			__ul_attribute__((nonnull));

extern blkid_loff_t blkid_probe_get_size(blkid_probe pr)
			__ul_attribute__((nonnull));
extern blkid_loff_t blkid_probe_get_offset(blkid_probe pr)
			__ul_attribute__((nonnull));
extern unsigned int blkid_probe_get_sectorsize(blkid_probe pr)
			__ul_attribute__((nonnull));
extern int blkid_probe_set_sectorsize(blkid_probe pr, unsigned int sz)
			__ul_attribute__((nonnull));
extern blkid_loff_t blkid_probe_get_sectors(blkid_probe pr)
			__ul_attribute__((nonnull));

extern int blkid_probe_get_fd(blkid_probe pr)
			__ul_attribute__((nonnull));

extern int blkid_probe_set_hint(blkid_probe pr, const char *name, uint64_t value)
			__ul_attribute__((nonnull));
extern void blkid_probe_reset_hints(blkid_probe pr)
			__ul_attribute__((nonnull));

/*
 * superblocks probing
 */
extern int blkid_known_fstype(const char *fstype)
			__ul_attribute__((nonnull));

extern int blkid_superblocks_get_name(size_t idx, const char **name, int *usage);

extern int blkid_probe_enable_superblocks(blkid_probe pr, int enable)
			__ul_attribute__((nonnull));

#define BLKID_SUBLKS_LABEL	(1 << 1) /* read LABEL from superblock */
#define BLKID_SUBLKS_LABELRAW	(1 << 2) /* read and define LABEL_RAW result value*/
#define BLKID_SUBLKS_UUID	(1 << 3) /* read UUID from superblock */
#define BLKID_SUBLKS_UUIDRAW	(1 << 4) /* read and define UUID_RAW result value */
#define BLKID_SUBLKS_TYPE	(1 << 5) /* define TYPE result value */
#define BLKID_SUBLKS_SECTYPE	(1 << 6) /* define compatible fs type (second type) */
#define BLKID_SUBLKS_USAGE	(1 << 7) /* define USAGE result value */
#define BLKID_SUBLKS_VERSION	(1 << 8) /* read FS type from superblock */
#define BLKID_SUBLKS_MAGIC	(1 << 9) /* define SBMAGIC and SBMAGIC_OFFSET */
#define BLKID_SUBLKS_BADCSUM	(1 << 10) /* allow a bad checksum */
#define BLKID_SUBLKS_FSINFO	(1 << 11) /* read and define fs properties from superblock */

#define BLKID_SUBLKS_DEFAULT	(BLKID_SUBLKS_LABEL | BLKID_SUBLKS_UUID | \
				 BLKID_SUBLKS_TYPE | BLKID_SUBLKS_SECTYPE)

extern int blkid_probe_set_superblocks_flags(blkid_probe pr, int flags)
			__ul_attribute__((nonnull));
extern int blkid_probe_reset_superblocks_filter(blkid_probe pr)
			__ul_attribute__((nonnull));
extern int blkid_probe_invert_superblocks_filter(blkid_probe pr)
			__ul_attribute__((nonnull));

/**
 * BLKID_FLTR_NOTIN
 */
#define BLKID_FLTR_NOTIN		1
/**
 * BLKID_FLTR_ONLYIN
 */
#define BLKID_FLTR_ONLYIN		2
extern int blkid_probe_filter_superblocks_type(blkid_probe pr, int flag, char *names[])
			__ul_attribute__((nonnull));

#define BLKID_USAGE_FILESYSTEM		(1 << 1)
#define BLKID_USAGE_RAID		(1 << 2)
#define BLKID_USAGE_CRYPTO		(1 << 3)
#define BLKID_USAGE_OTHER		(1 << 4)
extern int blkid_probe_filter_superblocks_usage(blkid_probe pr, int flag, int usage)
			__ul_attribute__((nonnull));

/*
 * topology probing
 */
extern int blkid_probe_enable_topology(blkid_probe pr, int enable)
			__ul_attribute__((nonnull));

/* binary interface */
extern blkid_topology blkid_probe_get_topology(blkid_probe pr)
			__ul_attribute__((nonnull));

extern unsigned long blkid_topology_get_alignment_offset(blkid_topology tp)
			__ul_attribute__((nonnull));
extern unsigned long blkid_topology_get_minimum_io_size(blkid_topology tp)
			__ul_attribute__((nonnull));
extern unsigned long blkid_topology_get_optimal_io_size(blkid_topology tp)
			__ul_attribute__((nonnull));
extern unsigned long blkid_topology_get_logical_sector_size(blkid_topology tp)
			__ul_attribute__((nonnull));
extern unsigned long blkid_topology_get_physical_sector_size(blkid_topology tp)
			__ul_attribute__((nonnull));
extern unsigned long blkid_topology_get_dax(blkid_topology tp)
			__ul_attribute__((nonnull));

/*
 * partitions probing
 */
extern int blkid_known_pttype(const char *pttype);
extern int blkid_partitions_get_name(const size_t idx, const char **name);

extern int blkid_probe_enable_partitions(blkid_probe pr, int enable)
			__ul_attribute__((nonnull));

extern int blkid_probe_reset_partitions_filter(blkid_probe pr)
			__ul_attribute__((nonnull));
extern int blkid_probe_invert_partitions_filter(blkid_probe pr)
			__ul_attribute__((nonnull));
extern int blkid_probe_filter_partitions_type(blkid_probe pr, int flag, char *names[])
			__ul_attribute__((nonnull));

/* partitions probing flags */
#define BLKID_PARTS_FORCE_GPT		(1 << 1)
#define BLKID_PARTS_ENTRY_DETAILS	(1 << 2)
#define BLKID_PARTS_MAGIC		(1 << 3)
extern int blkid_probe_set_partitions_flags(blkid_probe pr, int flags)
			__ul_attribute__((nonnull));

/* binary interface */
extern blkid_partlist blkid_probe_get_partitions(blkid_probe pr)
			__ul_attribute__((nonnull));

extern int blkid_partlist_numof_partitions(blkid_partlist ls)
			__ul_attribute__((nonnull));
extern blkid_parttable blkid_partlist_get_table(blkid_partlist ls)
			__ul_attribute__((nonnull));
extern blkid_partition blkid_partlist_get_partition(blkid_partlist ls, int n)
			__ul_attribute__((nonnull));
extern blkid_partition blkid_partlist_get_partition_by_partno(blkid_partlist ls, int n)
			__ul_attribute__((nonnull));
extern blkid_partition blkid_partlist_devno_to_partition(blkid_partlist ls, dev_t devno)
			__ul_attribute__((nonnull));
extern blkid_parttable blkid_partition_get_table(blkid_partition par)
			__ul_attribute__((nonnull));

extern const char *blkid_partition_get_name(blkid_partition par)
			__ul_attribute__((nonnull));
extern const char *blkid_partition_get_uuid(blkid_partition par)
			__ul_attribute__((nonnull));
extern int blkid_partition_get_partno(blkid_partition par)
			__ul_attribute__((nonnull));
extern blkid_loff_t blkid_partition_get_start(blkid_partition par)
			__ul_attribute__((nonnull));
extern blkid_loff_t blkid_partition_get_size(blkid_partition par)
			__ul_attribute__((nonnull));

extern int blkid_partition_get_type(blkid_partition par)
			__ul_attribute__((nonnull));
extern const char *blkid_partition_get_type_string(blkid_partition par)
			__ul_attribute__((nonnull));
extern unsigned long long blkid_partition_get_flags(blkid_partition par)
			__ul_attribute__((nonnull));

extern int blkid_partition_is_logical(blkid_partition par)
			__ul_attribute__((nonnull));
extern int blkid_partition_is_extended(blkid_partition par)
			__ul_attribute__((nonnull));
extern int blkid_partition_is_primary(blkid_partition par)
			__ul_attribute__((nonnull));

extern const char *blkid_parttable_get_type(blkid_parttable tab)
			__ul_attribute__((nonnull));
extern const char *blkid_parttable_get_id(blkid_parttable tab)
			__ul_attribute__((nonnull));
extern blkid_loff_t blkid_parttable_get_offset(blkid_parttable tab)
			__ul_attribute__((nonnull));
extern blkid_partition blkid_parttable_get_parent(blkid_parttable tab)
			__ul_attribute__((nonnull));

/*
 * NAME=value low-level interface
 */
extern int blkid_do_probe(blkid_probe pr)
			__ul_attribute__((nonnull));
extern int blkid_do_safeprobe(blkid_probe pr)
			__ul_attribute__((nonnull));
extern int blkid_do_fullprobe(blkid_probe pr)
			__ul_attribute__((nonnull));

extern int blkid_probe_numof_values(blkid_probe pr)
			__ul_attribute__((nonnull));
extern int blkid_probe_get_value(blkid_probe pr, int num, const char **name,
                        const char **data, size_t *len)
			__ul_attribute__((nonnull(1)));
extern int blkid_probe_lookup_value(blkid_probe pr, const char *name,
                        const char **data, size_t *len)
			__ul_attribute__((nonnull(1, 2)));
extern int blkid_probe_has_value(blkid_probe pr, const char *name)
			__ul_attribute__((nonnull));
extern int blkid_do_wipe(blkid_probe pr, int dryrun)
			__ul_attribute__((nonnull));
extern int blkid_probe_step_back(blkid_probe pr)
			__ul_attribute__((nonnull));

/*
 * Deprecated functions/macros
 */
#ifndef BLKID_DISABLE_DEPRECATED

#define BLKID_PROBREQ_LABEL     BLKID_SUBLKS_LABEL
#define BLKID_PROBREQ_LABELRAW  BLKID_SUBLKS_LABELRAW
#define BLKID_PROBREQ_UUID      BLKID_SUBLKS_UUID
#define BLKID_PROBREQ_UUIDRAW   BLKID_SUBLKS_UUIDRAW
#define BLKID_PROBREQ_TYPE      BLKID_SUBLKS_TYPE
#define BLKID_PROBREQ_SECTYPE   BLKID_SUBLKS_SECTYPE
#define BLKID_PROBREQ_USAGE     BLKID_SUBLKS_USAGE
#define BLKID_PROBREQ_VERSION   BLKID_SUBLKS_VERSION

extern int blkid_probe_set_request(blkid_probe pr, int flags)
			__ul_attribute__((deprecated));

extern int blkid_probe_filter_usage(blkid_probe pr, int flag, int usage)
			__ul_attribute__((deprecated));

extern int blkid_probe_filter_types(blkid_probe pr, int flag, char *names[])
			__ul_attribute__((deprecated));

extern int blkid_probe_invert_filter(blkid_probe pr)
			__ul_attribute__((deprecated));

extern int blkid_probe_reset_filter(blkid_probe pr)
			__ul_attribute__((deprecated));

#endif /* BLKID_DISABLE_DEPRECATED */

#ifdef __cplusplus
}
#endif

#endif /* _BLKID_BLKID_H */

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