a string containing the attribute's name.
The type of the attribute
a pointer to the value (or the pointer itself if the type is a pointer type)
a set of GFileQueryInfoFlags.
optional GCancellable object, NULL to ignore. [allow-none]
TRUE if the attribute was set, FALSE otherwise.
GException on failure.
Sets an attribute in the file with attribute name attribute to value. 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.