freebsd-skq/usr.sbin/ppp/exec.h
Brian Somers 887ff31f06 When ``ppp -direct'' is invoked by a program that uses pipe(2) to
create stdin and stdout, don't blindly try to use stdin as a bi-directional
channel.  Instead, detect the pipe and set up a special exec handler
that indirects write() calls through stdout.

This fixes the problem where ``set device "!ssh -e none host ppp
-direct label"'' no longer works with an openssh-5.2 server side as
that version of openssh ignores the USE_PIPES config setting and
*always* uses pipes (rather than socketpair) for stdin/stdout channels.

MFC after:	3 days
2009-08-24 17:19:45 +00:00

36 lines
1.6 KiB
C

/*-
* Copyright (c) 1999 Brian Somers <brian@Awfulhak.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
struct physical;
struct device;
extern struct device *exec_Create(struct physical *);
extern struct device *exec_iov2device(int, struct physical *,
struct iovec *, int *, int, int *, int *);
extern unsigned exec_DeviceSize(void);