Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!csd4.milw.wisc.edu!bionet!agate!ucbvax!hplabs!hpfcdc!rml
From: rml@hpfcdc.HP.COM (Bob Lenk)
Newsgroups: comp.sys.hp
Subject: Re: problem with compiling tn3270 under HP-UX
Message-ID: <5570138@hpfcdc.HP.COM>
Date: 22 Mar 89 01:41:45 GMT
References: <7588@batcomputer.tn.cornell.edu>
Organization: HP Ft. Collins, Co.
Lines: 32

>    I'm trying to build tn3270 on my 850 running HP-UX 2.1.  I've hit
>	a snag with a call to fcntl where the code passes F_GETOWN as the
>	second argument to fcntl.  Looking at the man pages for fcntl on a
>	BSD system, I see the following:
>
>	 F_GETOWN
>        F_SETOWN

Similar functionality is availible via the ioctl() commands FIOGSAIOOWN
and FIOSSAIOOWN.  They are documented under ioctl(5) and are based on
the BSD features, with the following differences:

	- Only a single process rather than a process group can receive
	  the signals.  This is because it is difficult or impossible
	  to enforce security when sending signals to process groups.
	  BSD does not enforce security; this is not a major problem
	  because SIGIO and SIGURG are ignored by default.

	- The names are changed because of the above difference.

	- While BSD supports the functionality via both fcntl() and
	  ioctl(), HP-UX supports it only via ioctl() because it
	  is a call to the underlying file, not the open instance
	  (file table entry) and thus more in keeping with the spirit
	  of ioctl().

	- The calls do not work on pipes as in BSD, because HP-UX pipes
	  are not sockets.

		Bob Lenk
		hplabs!hpfcla!rml
		rml%hpfcla@hplabs.hp.com