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From: gwyn%brl-vld@sri-unix.UUCP
Newsgroups: net.unix
Subject: Re:  4.2BSD: <sys/mtio.h>
Message-ID: <15791@sri-arpa.UUCP>
Date: Sat, 21-Jan-84 09:49:14 EST
Article-I.D.: sri-arpa.15791
Posted: Sat Jan 21 09:49:14 1984
Date-Received: Mon, 23-Jan-84 02:37:32 EST
Lines: 4

From:      Doug Gwyn (VLD/VMB) <gwyn@brl-vld>

_IOW is just a macro used to construct the proper TIOC*** code.  It is
defined in /usr/include/sys/ioctl.h .