Path: utzoo!mnetor!uunet!husc6!purdue!umd5!mimsy!chris
From: chris@mimsy.UUCP (Chris Torek)
Newsgroups: comp.unix.wizards
Subject: Re: Pty ports and TIOCUCNTL mode
Message-ID: <11241@mimsy.UUCP>
Date: 27 Apr 88 03:05:25 GMT
References: <576@modular.UUCP> <1013@sdcc7.ucsd.EDU> <1077@mcgill-vision.UUCP> <1019@sdcc7.ucsd.EDU>
Distribution: comp
Organization: U of Maryland, Dept. of Computer Science, Coll. Pk., MD 20742
Lines: 13

In article <1019@sdcc7.ucsd.EDU> muller@sdcc7.ucsd.EDU (Keith Muller) writes:
>Several vendors support TIOCUCNTL, but do not define UIOCMD in ioctl.h which
>is why #define JBOOT _IO(u, 1) etc was suggested over UIOCMD, there is no
>"rightness" here.

Actually, there is; _IO is an internal macro and its first argument
might change, so UIOCCMD is right and _IO is wrong.

(If you do not believe _IO's first argument might change, think again.
It already did!  UIOCCMD is now defined as _IO('u', n).)
-- 
In-Real-Life: Chris Torek, Univ of MD Comp Sci Dept (+1 301 454 7163)
Domain:	chris@mimsy.umd.edu	Path:	uunet!mimsy!chris