Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!usc!zaphod.mps.ohio-state.edu!lavaca.uh.edu!menudo.uh.edu!lobster!siswat!buck From: buck@siswat.UUCP (A. Lester Buck) Newsgroups: comp.unix.internals Subject: Re: asynchronous I/O in SVR4? Message-ID: <581@siswat.UUCP> Date: 9 Dec 90 23:37:06 GMT References: <579@siswat.UUCP> <2541@sixhub.UUCP> Organization: Photon Graphics, Houston Lines: 27 In article <2541@sixhub.UUCP>, davidsen@sixhub.UUCP (Wm E. Davidsen Jr) writes: < In article <4719@auspex.auspex.com> guy@auspex.auspex.com (Guy Harris) writes: < | >How about everyone with a Sun? SunOS 4.1 (billed as Sun's transition < | >to SVR4) < | < | Yes, that's one thing that it is. It's also Sun's release that adds an < | asynchronous I/O mechanism, but the mechanism doesn't come from S5R4, as < | far as I know.... < < The header files are in Dell V.4, but I don't see aiowait or asiowait < in the masterliblist file, which shows all the routines in every < library. Don't know if they only got half, or if they took some out, or < if the async stuff has those names redefined in the header files. I will < look, but not this morning. < -- < bill davidsen - davidsen@sixhub.uucp (uunet!crdgw1!sixhub!davidsen) And to answer my own original question... :-) Someone from UNIX System Laboratories returned my call and explained the situation with SVR4. No, SVR4 does not have any form of asynchronous I/O. A pre-release version did exist, but it was removed from the distributed code. Some of the STREAMS functionality depends on definitions in the asynch header files, so they had to stay. -- A. Lester Buck buck@siswat.lonestar.org ...!uhnix1!lobster!siswat!buck