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 gio.Cancellable object, NULL to ignore
TRUE if the attribute was set, FALSE otherwise.
GException on failure.
Sets an attribute in the file with attribute name attribute to value_p.
Some attributes can be unset by setting type to G_FILE_ATTRIBUTE_TYPE_INVALID and value_p to NULL.
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.