mnt_new_cache ()

struct libmnt_cache *
mnt_new_cache (void);

mnt_free_cache ()

void
mnt_free_cache (struct libmnt_cache *cache);

Deallocates the cache. This function does not care about reference count. Don't use this function directly -- it's better to use mnt_unref_cache().

mnt_ref_cache ()

void
mnt_ref_cache (struct libmnt_cache *cache);

Increments reference counter.

mnt_unref_cache ()

void
mnt_unref_cache (struct libmnt_cache *cache);

De-increments reference counter, on zero the cache is automatically deallocated by mnt_free_cache().

mnt_cache_device_has_tag ()

int
mnt_cache_device_has_tag (struct libmnt_cache *cache,
                          const char *devname,
                          const char *token,
                          const char *value);

Look up cache to check if tag +value are associated with devname .

mnt_cache_find_tag_value ()

char *
mnt_cache_find_tag_value (struct libmnt_cache *cache,
                          const char *devname,
                          const char *token);

mnt_cache_read_tags ()

int
mnt_cache_read_tags (struct libmnt_cache *cache,
                     const char *devname);

Reads devname LABEL and UUID to the cache .

mnt_cache_set_targets ()

int
mnt_cache_set_targets (struct libmnt_cache *cache,
                       struct libmnt_table *mountinfo);

Add to cache reference to mountinfo . This can be used to avoid unnecessary paths canonicalization in mnt_resolve_target().

mnt_cache_set_sbprobe ()

int
mnt_cache_set_sbprobe (struct libmnt_cache *cache,
                       int flags);

Add extra flags to the libblkid prober. Don't use if not sure.

mnt_get_fstype ()

char *
mnt_get_fstype (const char *devname,
                int *ambi,
                struct libmnt_cache *cache);

mnt_pretty_path ()

char *
mnt_pretty_path (const char *path,
                 struct libmnt_cache *cache);

Converts path:

mnt_resolve_path ()

char *
mnt_resolve_path (const char *path,
                  struct libmnt_cache *cache);

Converts path:

mnt_resolve_spec ()

char *
mnt_resolve_spec (const char *spec,
                  struct libmnt_cache *cache);

mnt_resolve_tag ()

char *
mnt_resolve_tag (const char *token,
                 const char *value,
                 struct libmnt_cache *cache);

mnt_resolve_target ()

char *
mnt_resolve_target (const char *path,
                    struct libmnt_cache *cache);

Like mnt_resolve_path(), unless cache is not NULL and mnt_cache_set_targets(cache, mountinfo) was called: if path is found in the cached mountinfo and the matching entry was provided by the kernel, assume that path is already canonicalized. By avoiding a call to realpath(2) on known mount points, there is a lower risk of stepping on a stale mount point, which can result in an application freeze. This is also faster in general, as stat(2) on a mount point is slower than on a regular file.

struct libmnt_cache

struct libmnt_cache;

Stores canonicalized paths and evaluated tags