From owner-cvs-lib  Sun Sep 14 17:36:42 1997
Return-Path: <owner-cvs-lib>
Received: (from root@localhost)
          by hub.freebsd.org (8.8.7/8.8.7) id RAA14778
          for cvs-lib-outgoing; Sun, 14 Sep 1997 17:36:42 -0700 (PDT)
Received: from precipice.shockwave.com (precipice.shockwave.com [207.105.15.229])
          by hub.freebsd.org (8.8.7/8.8.7) with ESMTP id RAA14694;
          Sun, 14 Sep 1997 17:35:18 -0700 (PDT)
Received: from shockwave.com (localhost [127.0.0.1]) by precipice.shockwave.com (8.8.6/8.7.3) with ESMTP id RAA12560; Sun, 14 Sep 1997 17:32:28 -0700 (PDT)
Message-Id: <199709150032.RAA12560@precipice.shockwave.com>
To: Peter Wemm <peter@FreeBSD.ORG>
cc: cvs-committers@FreeBSD.ORG, cvs-all@FreeBSD.ORG, cvs-lib@FreeBSD.ORG
Subject: Re: cvs commit: src/lib/libc/net res_send.c 
In-reply-to: Your message of "Sun, 14 Sep 1997 02:44:35 PDT."
             <199709140944.CAA18300@freefall.freebsd.org> 
Date: Sun, 14 Sep 1997 17:32:28 -0700
From: Paul Traina <pst@shockwave.com>
Sender: owner-cvs-lib@FreeBSD.ORG
X-Loop: FreeBSD.org
Precedence: bulk

Thanks, this was a good thing to do (tm).

Overkill away. :-)

  From: Peter Wemm <peter@FreeBSD.ORG>
  Subject: cvs commit: src/lib/libc/net res_send.c
  peter       1997/09/14 02:44:35 PDT
  
    Modified files:
      lib/libc/net         res_send.c 
    Log:
    Call poll(2) from within the resolver but adapt to older kernels without it
    if necessary.  This removes the need to malloc large fd_set's for selecting
    on high fd's (larger than FD_SETSIZE at libc compile time).
    
    The syscall adaptive stuff only happens on the very first call.  SIGSYS
    is masked, and if the call to poll fails with ENOSYS, then we use select
    for the life of the program.  If poll does not fail with ENOSYS, then we
    always use poll and skip the once-off signal masking gunk.
    
    This may be overkill, but it saved my neck a few times while working on
    multiple different sets of kernel sources, some with poll, some without.
    
    Revision  Changes    Path
    1.19      +68 -26    src/lib/libc/net/res_send.c