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- Path: 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>
- Sender: usenet@ni.umd.edu (USENET News System)
- Organization: University of Maryland College Park
- Lines: 13
- Nntp-Posting-Host: sayshell.umd.edu
-
- 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
-