X-Recipient: archive-cygwin@delorie.com X-SWARE-Spam-Status: No, hits=-2.0 required=5.0 tests=AWL,BAYES_00,SPF_SOFTFAIL X-Spam-Check-By: sourceware.org Message-ID: <4AFDCB3F.6010904@byu.net> Date: Fri, 13 Nov 2009 14:10:23 -0700 From: Eric Blake User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1.23) Gecko/20090812 Thunderbird/2.0.0.23 Mnenhy/0.7.6.666 MIME-Version: 1.0 To: Salvador Fandino CC: cygwin@cygwin.com Subject: Re: [BUG] fopen(..., "a") does not seek to end of file until some write operation References: <592384.26227.qm@web52612.mail.re2.yahoo.com> <4AFDC46A.3070503@byu.net> <158595.94935.qm@web52607.mail.re2.yahoo.com> In-Reply-To: <158595.94935.qm@web52607.mail.re2.yahoo.com> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit X-IsSubscribed: yes Mailing-List: contact cygwin-help@cygwin.com; run by ezmlm List-Id: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: cygwin-owner@cygwin.com Mail-Followup-To: cygwin@cygwin.com Delivered-To: mailing list cygwin@cygwin.com -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 According to Salvador Fandino on 11/13/2009 1:55 PM: >> Not a bug. POSIX allows this behavior, and Linux does it as well. > > In Linux (at least on the one I have installed, Ubuntu 9.10) ftell does not return cero but the EOF offset: Ok, so "a" and "a+" apparently behave differently in Linux. Submit a patch to newlib if it bothers you. Still, the point remains that this does not violate POSIX. Also, since the underlying open() is _required_ to be at offset 0 when opening a file for appending, it is actually _more_ syscalls if stdio seeks to the end of an append stream during fopen(), rather than waiting until the first write. - -- Don't work too hard, make some time for fun as well! Eric Blake ebb9@byu.net -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.9 (Cygwin) Comment: Public key at home.comcast.net/~ericblake/eblake.gpg Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iEYEARECAAYFAkr9yz8ACgkQ84KuGfSFAYB5xQCfSJfFcEpkpFdiCQJ1WU1xFWHb UigAn05HDxKfozs7eFkMgxZ8PiBgJoHS =sfVV -----END PGP SIGNATURE----- -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple