From mboxrd@z Thu Jan 1 00:00:00 1970 Path: main.gmane.org!not-for-mail From: Rob Browning Newsgroups: gmane.lisp.guile.devel Subject: Re: setgroups Date: Fri, 18 Apr 2003 12:01:44 -0500 Sender: guile-devel-bounces+guile-devel=m.gmane.org@gnu.org Message-ID: <87el3z3fk7.fsf@raven.i.defaultvalue.org> References: <87brz4dagq.fsf@raven.i.defaultvalue.org> <87u1cwcwcq.fsf@raven.i.defaultvalue.org> <874r4w85b6.fsf@zagadka.ping.de> <87vfxb3jac.fsf@raven.i.defaultvalue.org> NNTP-Posting-Host: main.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Trace: main.gmane.org 1050685593 13759 80.91.224.249 (18 Apr 2003 17:06:33 GMT) X-Complaints-To: usenet@main.gmane.org NNTP-Posting-Date: Fri, 18 Apr 2003 17:06:33 +0000 (UTC) Original-X-From: guile-devel-bounces+guile-devel=m.gmane.org@gnu.org Fri Apr 18 19:06:31 2003 Return-path: Original-Received: from monty-python.gnu.org ([199.232.76.173]) by main.gmane.org with esmtp (Exim 3.35 #1 (Debian)) id 196ZJI-0003Y5-00 for ; Fri, 18 Apr 2003 19:06:00 +0200 Original-Received: from localhost ([127.0.0.1] helo=monty-python.gnu.org) by monty-python.gnu.org with esmtp (Exim 4.10.13) id 196ZHu-0008UT-05 for guile-devel@m.gmane.org; Fri, 18 Apr 2003 13:04:34 -0400 Original-Received: from list by monty-python.gnu.org with tmda-scanned (Exim 4.10.13) id 196ZHe-0008SC-00 for guile-devel@gnu.org; Fri, 18 Apr 2003 13:04:18 -0400 Original-Received: from mail by monty-python.gnu.org with spam-scanned (Exim 4.10.13) id 196ZHc-0008Rd-00 for guile-devel@gnu.org; Fri, 18 Apr 2003 13:04:17 -0400 Original-Received: from dsl093-098-016.wdc1.dsl.speakeasy.net ([66.93.98.16] helo=defaultvalue.org) by monty-python.gnu.org with esmtp (Exim 4.10.13) id 196ZFB-0007fI-00 for guile-devel@gnu.org; Fri, 18 Apr 2003 13:01:45 -0400 Original-Received: from raven.i.defaultvalue.org (raven.i.defaultvalue.org [192.168.1.7]) by defaultvalue.org (Postfix) with ESMTP id 7BB5A6BC3 for ; Fri, 18 Apr 2003 12:01:44 -0500 (CDT) Original-Received: by raven.i.defaultvalue.org (Postfix, from userid 1000) id 501CE21521B; Fri, 18 Apr 2003 12:01:44 -0500 (CDT) Original-To: guile-devel@gnu.org In-Reply-To: (prj@po.cwru.edu's message of "Fri, 18 Apr 2003 12:00:40 -0400") User-Agent: Gnus/5.090008 (Oort Gnus v0.08) Emacs/21.2 (i386-pc-linux-gnu) X-BeenThere: guile-devel@gnu.org X-Mailman-Version: 2.1b5 Precedence: list List-Id: Developers list for Guile, the GNU extensibility library List-Help: List-Post: List-Subscribe: , List-Archive: List-Unsubscribe: , Errors-To: guile-devel-bounces+guile-devel=m.gmane.org@gnu.org Xref: main.gmane.org gmane.lisp.guile.devel:2187 X-Report-Spam: http://spam.gmane.org/gmane.lisp.guile.devel:2187 prj@po.cwru.edu (Paul Jarc) writes: > unsigned long lgid = SCM_INUM (foo); > GETGROUPS_T gid = lgid; > if (gid < 0 || lgid != (unsigned long) gid) overflow; > > - Is SCM_INUM guaranteed to fit in unsigned long? If not, what type > can we use instead? I believe scm_t_bits (there's also scm_t_signed_bits) may be what you want. > - If GETGROUPS_T is signed and "gid = lgid" overflows, the C standard > says it's undefined behavior. Are we worried about that, or are we > confident that it'll just wrap on platforms we care about? I wondered about signed vs unsigned gid_t too... -- Rob Browning rlb @defaultvalue.org, @linuxdevel.com, and @debian.org Previously @cs.utexas.edu GPG starting 2002-11-03 = 14DD 432F AE39 534D B592 F9A0 25C8 D377 8C7E 73A4 _______________________________________________ Guile-devel mailing list Guile-devel@gnu.org http://mail.gnu.org/mailman/listinfo/guile-devel