HP UX 11i v1 I/O Cards This return parameter is undefined, Zcom error codes and their meanings

		ZCOM C I/F Library Routines
		ZLUOPEN (3X)
Threads	This routine may be called from a multi-threaded application using the
Considerations	POSIX (1003.1c) kernel threads API package. This routine has the
	following characteristics when called by a multi-threaded application:
	cancellation point	Thread cancellation can occur when a thread calls this
		routine.
	async-cancel unsafe	The calling thread’s cancelability type must be
		PTHREAD_CANCEL_DEFERRED if cancellation is
		enabled.
	async-signal unsafe	It cannot be called from a signal handler.
	fork unsafe	It cannot be called by a child process after fork(2) but
		before exec(2).
PARAMETERS
	zap	ZCOM address (checksum is not used). Node must be
		zero or contain the local node as defined in the TTGEN
		configuration file.
	mode	Open mode. Parameter is not used and should be
		specified as zero.
	fd	Returned file descriptor. If zluopen is returned with error,
	(Return Param)	this return parameter is undefined.
RETURN VALUE	Routine zluopen returns 0 if successful. Otherwise, a non-zeroerror
	code is returned. See /opt/acc/include/zcom/zcomsys.h for the list of
	ZCOM error codes and their meanings.

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