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Path: euryale.cc.adfa.oz.au!newshost.anu.edu.au!harbinger.cc.monash.edu.au!news.cs.su.oz.au!metro!metro!munnari.OZ.AU!news.ecn.uoknor.edu!news.eng.convex.com!newshost.convex.com!bcm.tmc.edu!news.msfc.nasa.gov!newsfeed.internetmci.com!iol!tank.news.pipex.net!pipex!dispatch.news.demon.net!demon!jraynard.demon.co.uk!not-for-mail From: james@jraynard.demon.co.uk (James Raynard) Newsgroups: comp.unix.bsd.freebsd.misc Subject: Re: shmget() : SHM_R and SHM_W flags not defined? Date: 17 May 1996 22:59:22 -0000 Organization: A FreeBSD Box Lines: 19 Message-ID: <4nj0ca$rgn@jraynard.demon.co.uk> References: <4nghvr$huo@news.csus.edu> NNTP-Posting-Host: localhost.demon.co.uk X-NNTP-Posting-Host: jraynard.demon.co.uk In article <4nghvr$huo@news.csus.edu>, WEE-KING LEONG <wleong@mercury.sfsu.edu> wrote: > >These two flags are defined in shm.h in SunOS. And Richard Stevens's >book "Advance Programming in UNIX" also mentioned these flags. Why >are they missing from the FreeBSD shm.h? They're not. In /usr/include/sys/shm.h on 2.1.0, you'll find:- #define SHM_R (IPC_R) #define SHM_W (IPC_W) However, you'll have noticed that Stevens is not exactly enthusiastic about System V IPC - and with good reason IMO. -- James Raynard, Edinburgh, Scotland jraynard@dial.pipex.com james@jraynard.demon.co.uk