Re: _IO, _IOR, _IOW and _IOWR functions

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#1229

From: Louis A. Mamakos
Date: Wed, 19 Aug 1992 21:07

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In article <rabjab.11.0@golem.ucsd.edu> rabjab@golem.ucsd.edu (Jeff Bytof) writes:
>Does anyone have good documentation for the NeXT low-level system
>functions _IO,_IOR, _IOW and _IOWR?  They are mentioned extensively
>in various include files in /usr/include but not in sufficient detail
>to get a really good handle on them.

These are macros defined in /usr/include/sys/ioctl.h (at least until
3.0 comes out, when them move to some god-forsaken part of the file
system).  These macros are used to construct arguments to the ioctl()
system call.  That's all they are used for, generally, on UNIX
systems.

louie

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Path: arc1-ca.pugleaf.net!sparky!uunet!portal!lll-winken!ames!haven.umd.edu!ni.umd.edu!sayshell.umd.edu!louie
From: louie@sayshell.umd.edu (Louis A. Mamakos)
Newsgroups: comp.sys.next.programmer
Subject: Re: _IO, _IOR, _IOW and _IOWR functions
Keywords: low level NeXT system functions
Message-ID: <1992Aug19.210723.3758@ni.umd.edu>
Date: 19 Aug 92 21:07:23 GMT
References: <rabjab.11.0@golem.ucsd.edu>
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