HP UX 11i v1 I/O Cards manual Error codes and their meanings, Zread3X, zluopen3X

			ZCOM C I/F Library Routines
			ZPEEK (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).
RETURN VALUE	Routine zopen 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.
FILES
	/opt/acc/include/zcom/zcomsys.h		ZCOM subsystem general include file,
			containing data types, data structures,
			constants, error codes, masks, etc. Note that
			this must be the first include file before any
			other ZCOM include files.
	/opt/acc/include/zcom/zcomcall.h		ZCOM routine function prototypes
			(requires ANSI C (compilation).
SEE ALSO	zread(3X), zluopen(3X)

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