blkid.h

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/*
 * 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 <blkid/blkid_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);
extern void blkid_gc_cache(blkid_cache cache);
 
/* 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_set_search(blkid_dev_iterate iter,
                char *search_type, 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);
 
/* devname.c */
extern int blkid_probe_all(blkid_cache cache);
extern int blkid_probe_all_new(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 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);
extern int blkid_get_library_version(const char **ver_string,
                     const char **date_string);
 
#ifdef __cplusplus
}
#endif
 
#endif /* _BLKID_BLKID_H */