Similar to query_info, but obtains information about the filesystem the this is on, rather than the file itself.
For instance the amount of space available and the type of the filesystem.
attributes value is a string that specifies the attributes that should be gathered. It is not an error if it's not possible to
read a particular requested attribute from a file - it just won't be set.
attributes should be a comma-separated list of
attributes or attribute wildcards. The wildcard "*" means all attributes, and a wildcard like "filesystem::*" means all attributes in the
filesystem namespace. The standard namespace for filesystem attributes is "filesystem". Common attributes of interest are
g_file_attribute_filesystem_size (the total size of the filesystem in bytes),
g_file_attribute_filesystem_free (number of bytes available), and g_file_attribute_filesystem_type (
type of the filesystem).
cancellable is not null, then the operation can be cancelled by triggering the cancellable
object from another thread. If the operation was cancelled, the error g_io_error_cancelled will be returned.
If the file does not exist, the g_io_error_not_found error will be returned. Other errors are possible too, and depend on what kind of filesystem the file is on.
an attribute query string
optional Cancellable object, null to ignore