STREAMS Programming Guide

Checking Module Type

Next, see the code that enables a driver to determine if it is running as a regular driver, a module, or a cloneable driver. The open routine returns sflag, which is checked.

	if (sflag == MODOPEN)
 			/* then the module is being pushed */
		else if (sflag == CLONEOPEN)
 			/* then its being opened as a clonable driver */
 			/* its being opened as a regular driver */