Mailing-List: contact cygwin-help@sourceware.cygnus.com; run by ezmlm List-Subscribe: List-Archive: List-Post: List-Help: , Sender: cygwin-owner@sources.redhat.com Delivered-To: mailing list cygwin@sources.redhat.com Date: Mon, 26 Feb 2001 15:08:27 +0100 From: Corinna Vinschen To: cygwin@cygwin.com Subject: Re: lseek() fails to seek on /dev/fd0 ('\\.\A:') Message-ID: <20010226150827.N27406@cygbert.vinschen.de> Mail-Followup-To: cygwin@cygwin.com References: Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.2.5i In-Reply-To: ; from jojo@virtutech.se on Mon, Feb 26, 2001 at 01:03:29PM +0100 On Mon, Feb 26, 2001 at 01:03:29PM +0100, Jesper Eskilson wrote: > Jesper Eskilson writes: > > > Why is it ok to seek to 0 bytes and 1 byte, but not 2? > > The test-program passed parameters in the wrong order, the correct order is > > lseek(fd, pos, whence) > > However, this was not the error I was really trying to fix (the real > program passed the parameters in the correct order). The real problem was > that lseek() fails when doing SEEK_END on a raw device. On Linux and > Solaris, lseek() return 0 when doing SEEK_END on raw devices. My catchword. SEEK_END is not supported on raw devices by Cygwin currently. The reason is that the Windows function SetFilePointer() returns EINVAL or sth similar when called with FILE_END on raw disk devices. Since I didn't get any meaningful result when calling GetFileSize() either, I currently don't have a way to support SEEK_END. Hints welcome. Corinna -- Corinna Vinschen Please, send mails regarding Cygwin to Cygwin Developer mailto:cygwin@cygwin.com Red Hat, Inc. -- Want to unsubscribe from this list? Check out: http://cygwin.com/ml/#unsubscribe-simple