From owner-freebsd-current Wed Nov 25 09:36:52 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id JAA23655 for freebsd-current-outgoing; Wed, 25 Nov 1998 09:36:52 -0800 (PST) (envelope-from owner-freebsd-current@FreeBSD.ORG) Received: from dingo.cdrom.com (dingo.cdrom.com [204.216.28.145]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id JAA23649 for ; Wed, 25 Nov 1998 09:36:51 -0800 (PST) (envelope-from mike@dingo.cdrom.com) Received: from dingo.cdrom.com (localhost.cdrom.com [127.0.0.1]) by dingo.cdrom.com (8.9.1/8.8.8) with ESMTP id JAA01096; Wed, 25 Nov 1998 09:34:33 -0800 (PST) (envelope-from mike@dingo.cdrom.com) Message-Id: <199811251734.JAA01096@dingo.cdrom.com> X-Mailer: exmh version 2.0.2 2/24/98 To: HighWind Software Information cc: current@FreeBSD.ORG Subject: Re: Resend In-reply-to: Your message of "Wed, 25 Nov 1998 03:44:33 EST." <199811250844.DAA27850@highwind.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Date: Wed, 25 Nov 1998 09:34:33 -0800 From: Mike Smith Sender: owner-freebsd-current@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG > > I'm trying to track a problem where a "write()" to a socket > sends the beginning of the data over and over. > > I'm looking at "sosend()" in uipc_socket.c, a comment says: > > > * Returns nonzero on error, timeout or signal; callers > > * must check for short counts if EINTR/ERESTART are returned. > > * Data and control buffers are freed on return. > > However, I don't see anywhere in the code where it returns > EINTR/ERESTART. That is, if this code mistakenly loops when it gets > interrupted or does a partial write(), it would result in the behavior > I am seeing. The sblock() macro can return this. > That is: > When asked to write a big buffer "1234", we are sometimes seeing > on the network connection: > "1121231234" > > > Any ideas? You'll also get this behaviour if the socket is nonblocking and you only make a partial write, but forget to update your buffer pointer/ count before calling write() again. -- \\ Sometimes you're ahead, \\ Mike Smith \\ sometimes you're behind. \\ mike@smith.net.au \\ The race is long, and in the \\ msmith@freebsd.org \\ end it's only with yourself. \\ msmith@cdrom.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message