Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758252Ab0FOUXw (ORCPT ); Tue, 15 Jun 2010 16:23:52 -0400 Received: from lirone.symas.net ([64.71.152.235]:44128 "EHLO lirone.symas.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754332Ab0FOUXv (ORCPT ); Tue, 15 Jun 2010 16:23:51 -0400 Message-ID: <4C17E14F.5090908@symas.com> Date: Tue, 15 Jun 2010 13:23:43 -0700 From: Howard Chu User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; rv:1.9.3a5pre) Gecko/20100607 Firefox 3.6 MIME-Version: 1.0 To: Alan Cox CC: linux-kernel@vger.kernel.org, Greg KH Subject: Re: [PATCH] tty: Add EXTPROC support for LINEMODE References: <20100615202924.24446d28@lxorguk.ukuu.org.uk> <4C17DA85.40803@symas.com> In-Reply-To: <4C17DA85.40803@symas.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3787 Lines: 85 Howard Chu wrote: >>> diff --git a/arch/alpha/include/asm/termbits.h b/arch/alpha/include/asm/termbits.h >>> index ad854a4..879dd35 100644 >>> --- a/arch/alpha/include/asm/termbits.h >>> +++ b/arch/alpha/include/asm/termbits.h >>> @@ -180,6 +180,7 @@ struct ktermios { >>> #define FLUSHO 0x00800000 >>> #define PENDIN 0x20000000 >>> #define IEXTEN 0x00000400 >>> +#define EXTPROC 0x10000000 >> >> For Alpha this value should match OSF if possible. > > I'm grubbing around looking for a live Alpha system now, doesn't seem likely > that I'll find one. Not sure what needs to match here, it's also unlikely that > OSF/1 (or any other SVR4 platform) ever provided a definition for this bit. > Looking at the telnet README: > >>>> > This is a distribution of both client and server telnet. These programs > have been compiled on: > telnet telnetd > BSD 4.4 x x > BSD 4.3 Reno X X > UNICOS 8.0 X X > UNICOS 7.C X X > UNICOS 7.0 X X > UNICOS 6.1 X X > BSDI 1.0 X X > Solaris 2.2 x x (no linemode in server) > Solaris 2.3 x x (no linemode in server) > SunOs 4.1.3 X X (no linemode in server) > Ultrix 4.3 X X (no linemode in server) > DYNIX V3.0.17.9 X X (no linemode in server) > HP-UX 8.0 x x (no linemode in server) > <<<< > > I doubt that anyone ever ported this feature over to those OSes. Closest thing I've found so far is for HPUX 11i Version 2: http://docs.hp.com/en/B2355-90848docs/B2355-90848docs.pdf >>>> TIOCREMOTE This ioctl puts the STREAMS pty in and out of Remote Mode. When Remote Mode is on, input data will be flow-controlled and passed through ldterm without any input processing regardless of the terminal mode. When the pty master driver receives this ioctl, it will send an M_CTL message downstream to ldterm via ptm, pts, and ptem. The command in the M_CTL message is set to MC_NO_CANON or MC_DO_CANON depending whether to turn on or off the Remote Mode. The format of this ioctl is: int ioctl(master_fd, TIOCREMOTE, argument) where the argument is set to 1 to turn on Remote Mode and 0 to turn it off. Remote Mode is normally used when doing remote line editing in a window manager, or whenever flow-controlled input is required. Each write to the master device produces a record boundary for the process reading the slave devices. In normal usage, a write of data is like the data typed as a line on the terminal; a write of 0 (zero) bytes is like typing an EOF (End-of-File) character. TIOCSIGNAL This ioctl allows the master process to send a signal to the slave process. The format of this ioctl is: int ioctl(master_fd, TIOCSIGNAL, argument) where the argument is the signal number as defined in the header file . For example the master process can send an SIGINT signal to the slave process by doing: ioctl(master_fd, TIOCSIGNAL, SIGINT) <<<< TIOCREMOTE seems to be the SVR4 analogue to TIOCPKT without any of the useful parts; it doesn't include the prefix byte, so it doesn't provide any state change information. -- -- Howard Chu CTO, Symas Corp. http://www.symas.com Director, Highland Sun http://highlandsun.com/hyc/ Chief Architect, OpenLDAP http://www.openldap.org/project/ -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/