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 <blkid/blkid_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 extern void blkid_gc_cache(blkid_cache cache); 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 /* version.c */ 102 extern int blkid_parse_version_string(const char *ver_string); 103 extern int blkid_get_library_version(const char **ver_string, 104 const char **date_string); 105 106 #ifdef __cplusplus 107 } 108 #endif 109 110 #endif /* _BLKID_BLKID_H */