ldlinux.h revision 9acbbeaf2a1ffe5c14b244867d427714fab43c5c
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2006 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#ifndef _SYS_LDLINUX_H
#define _SYS_LDLINUX_H
#pragma ident "%Z%%M% %I% %E% SMI"
/*
* The ldlinux streams module is only intended for use in lx branded zones.
* This streams module implements the following ioctls:
* TIOCSETLD and TIOCGETLD
*
* These ioctls are special ioctls supported only by the ldlinux streams
* module and invoked only by the lx brand emulation library. These ioctls
* do not exist on native Linux systems.
*
* The TIOCSETLD ioctl is used when emulating the following Linux ioctls:
*
* The TIOCGETLD ioctl is used when emulating the following Linux ioctls:
*
* This module is needed to emulate these ioctls because the following arrays:
* termio.c_cc
* termios.c_cc
* which are parameters for the following ioctls:
*
* are defined differently on Solaris and Linux.
*
* According to the termio(7I) man page on Solaris the following is true of
* the members of the c_cc array:
* The VMIN element is the same element as the VEOF element.
* The VTIME element is the same element as the VEOL element.
*
* But on Linux the termios(3) man page states:
* These symbolic subscript values are all different, except that
* VTIME, VMIN may have the same value as VEOL, VEOF, respectively.
*
* While the man page indicates that these values may be the same empirical
* tests shows them to be different. Since these values are different on
* Linux systems it's possible that applications could set the members of
* the c_cc array to different values and then later expect to be able to
* read back those same separate values. The ldlinux module exists to provide
* a per-stream storage area where the lx_brand emulation library can save
* these values. The values are set and retrieved via the TIOCSETLD and
* TIOCGETLD ioctls respectively.
*/
#ifdef __cplusplus
extern "C" {
#endif
#define LDLINUX_MOD "ldlinux"
#ifdef _KERNEL
/*
* LDLINUX_MODID - This should be a unique number associated with
* this particular module. Unfortunatly there is no authority responsible
* for administering this name space, hence there's no real guarantee that
* whatever number we choose will be unique. Luckily, this constant
* is not really used anywhere by the system. It is used by some
* kernel subsystems to check for the presence of certain streams
* modules with known id vaules. Since no other kernel subsystem
* checks for the presence of this module we'll just set the id to 0.
*/
#define LDLINUX_MODID 0
struct ldlinux {
int state; /* state information */
/* Linux expects the next four c_cc values */
/* to be distinct, whereas solaris (legally) */
/* overlaps their storage */
unsigned char veof; /* veof value */
unsigned char veol; /* veol value */
unsigned char vmin; /* vmin value */
unsigned char vtime; /* vtime value */
};
#define ISPTSTTY 0x01
#endif /* _KERNEL */
#ifdef __cplusplus
}
#endif
#endif /* _SYS_LDLINUX_H */