a string containing the attribute's name.
a guint64 containing the attribute's new value.
a GFileQueryInfoFlags.
optional GCancellable object, NULL to ignore. [allow-none]
TRUE if the attribute was successfully set, FALSE otherwise.
GException on failure.
Sets attribute of type G_FILE_ATTRIBUTE_TYPE_INT64 to value. If attribute is of a different type, this operation will fail. If 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.