e2fsprogs/blkid/blkid.h

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