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   1 /* vi: set sw=4 ts=4: */
   2 /*
   3  * blkid.h - Interface for libblkid, a library to identify block devices
   4  *
   5  * Copyright (C) 2001 Andreas Dilger
   6  * Copyright (C) 2003 Theodore Ts'o
   7  *
   8  * %Begin-Header%
   9  * This file may be redistributed under the terms of the
  10  * GNU Lesser General Public License.
  11  * %End-Header%
  12  */
  13
  14 #ifndef _BLKID_BLKID_H
  15 #define _BLKID_BLKID_H
  16
  17 #include <sys/types.h>
  18 #include <linux/types.h>
  19
  20 #ifdef __cplusplus
  21 extern "C" {
  22 #endif
  23
  24 #define BLKID_VERSION   "1.0.0"
  25 #define BLKID_DATE      "12-Feb-2003"
  26
  27 typedef struct blkid_struct_dev *blkid_dev;
  28 typedef struct blkid_struct_cache *blkid_cache;
  29 typedef __s64 blkid_loff_t;
  30
  31 typedef struct blkid_struct_tag_iterate *blkid_tag_iterate;
  32 typedef struct blkid_struct_dev_iterate *blkid_dev_iterate;
  33
  34 /*
  35  * Flags for blkid_get_dev
  36  *
  37  * BLKID_DEV_CREATE     Create an empty device structure if not found
  38  *                      in the cache.
  39  * BLKID_DEV_VERIFY     Make sure the device structure corresponds
  40  *                      with reality.
  41  * BLKID_DEV_FIND       Just look up a device entry, and return NULL
  42  *                      if it is not found.
  43  * BLKID_DEV_NORMAL     Get a valid device structure, either from the
  44  *                      cache or by probing the device.
  45  */
  46 #define BLKID_DEV_FIND          0x0000
  47 #define BLKID_DEV_CREATE        0x0001
  48 #define BLKID_DEV_VERIFY        0x0002
  49 #define BLKID_DEV_NORMAL        (BLKID_DEV_CREATE | BLKID_DEV_VERIFY)
  50
  51 /* cache.c */
  52 extern void blkid_put_cache(blkid_cache cache);
  53 extern int blkid_get_cache(blkid_cache *cache, const char *filename);
  54
  55 /* dev.c */
  56 extern const char *blkid_dev_devname(blkid_dev dev);
  57
  58 extern blkid_dev_iterate blkid_dev_iterate_begin(blkid_cache cache);
  59 extern int blkid_dev_set_search(blkid_dev_iterate iter,
  60                                 char *search_type, char *search_value);
  61 extern int blkid_dev_next(blkid_dev_iterate iterate, blkid_dev *dev);
  62 extern void blkid_dev_iterate_end(blkid_dev_iterate iterate);
  63
  64 /* devno.c */
  65 extern char *blkid_devno_to_devname(dev_t devno);
  66
  67 /* devname.c */
  68 extern int blkid_probe_all(blkid_cache cache);
  69 extern int blkid_probe_all_new(blkid_cache cache);
  70 extern blkid_dev blkid_get_dev(blkid_cache cache, const char *devname,
  71                                int flags);
  72
  73 /* getsize.c */
  74 extern blkid_loff_t blkid_get_dev_size(int fd);
  75
  76 /* probe.c */
  77 int blkid_known_fstype(const char *fstype);
  78 extern blkid_dev blkid_verify(blkid_cache cache, blkid_dev dev);
  79
  80 /* read.c */
  81
  82 /* resolve.c */
  83 extern char *blkid_get_tag_value(blkid_cache cache, const char *tagname,
  84                                        const char *devname);
  85 extern char *blkid_get_devname(blkid_cache cache, const char *token,
  86                                const char *value);
  87
  88 /* tag.c */
  89 extern blkid_tag_iterate blkid_tag_iterate_begin(blkid_dev dev);
  90 extern int blkid_tag_next(blkid_tag_iterate iterate,
  91                               const char **type, const char **value);
  92 extern void blkid_tag_iterate_end(blkid_tag_iterate iterate);
  93 extern int blkid_dev_has_tag(blkid_dev dev, const char *type,
  94                               const char *value);
  95 extern blkid_dev blkid_find_dev_with_tag(blkid_cache cache,
  96                                          const char *type,
  97                                          const char *value);
  98 extern int blkid_parse_tag_string(const char *token, char **ret_type,
  99                                   char **ret_val);
 100
 101 #ifdef __cplusplus
 102 }
 103 #endif
 104
 105 #endif /* _BLKID_BLKID_H */