mirror of
https://git.FreeBSD.org/src.git
synced 2024-11-29 08:08:37 +00:00
dc08ffec87
Introduce d_version field in struct cdevsw, this must always be initialized to D_VERSION. Flip sense of D_NOGIANT flag to D_NEEDGIANT, this involves removing four D_NOGIANT flags and adding 145 D_NEEDGIANT flags.
82 lines
2.4 KiB
C
82 lines
2.4 KiB
C
/*-
|
|
* Copyright (c) 2003 Poul-Henning Kamp. 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.
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/conf.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/proc.h>
|
|
#include <sys/vnode.h>
|
|
|
|
static d_open_t cttyopen;
|
|
|
|
#define CDEV_MAJOR 1
|
|
|
|
static struct cdevsw ctty_cdevsw = {
|
|
.d_version = D_VERSION,
|
|
.d_open = cttyopen,
|
|
.d_name = "ctty",
|
|
.d_maj = CDEV_MAJOR,
|
|
.d_flags = D_TTY | D_NEEDGIANT,
|
|
};
|
|
|
|
static dev_t ctty;
|
|
|
|
static int
|
|
cttyopen(dev_t dev, int flag, int mode, struct thread *td)
|
|
{
|
|
|
|
return (ENXIO);
|
|
}
|
|
|
|
static void
|
|
ctty_clone(void *arg, char *name, int namelen, dev_t *dev)
|
|
{
|
|
|
|
if (*dev != NODEV)
|
|
return;
|
|
if (strcmp(name, "tty"))
|
|
return;
|
|
if (!(curthread->td_proc->p_flag & P_CONTROLT))
|
|
*dev = ctty;
|
|
else if (curthread->td_proc->p_session->s_ttyvp == NULL)
|
|
*dev = ctty;
|
|
else
|
|
*dev = curthread->td_proc->p_session->s_ttyvp->v_rdev;
|
|
}
|
|
|
|
static void
|
|
ctty_drvinit(void *unused)
|
|
{
|
|
|
|
EVENTHANDLER_REGISTER(dev_clone, ctty_clone, 0, 1000);
|
|
ctty = make_dev(&ctty_cdevsw, 0, 0, 0, 0666, "ctty");
|
|
}
|
|
|
|
SYSINIT(cttydev,SI_SUB_DRIVERS,SI_ORDER_MIDDLE+CDEV_MAJOR,ctty_drvinit,NULL)
|