d/freebsd-skq
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
85386c7cf6
freebsd-skq/sys/kern/tty_tty.c

81 lines
2.3 KiB
C
Raw Normal View History

When we use DEVFS, we don't need the /dev/tty pseudo-driver to do more than return ENXIO from its open routine, so most of this file is unneeded. A straight #ifdef'ing would look quite messy, and make the file quite unreadable, so instead I have simply added the DEVFS version of the file at the top, protected by #ifndef NODEVFS. Once we have removed NODEVFS option, we can retain 86 the 86 lines at the top and drop the other 287 lines.
2003-01-19 10:23:47 +00:00
/*-
* 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.
*/
Use __FBSDID().
2003-06-11 00:56:59 +00:00
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
When we use DEVFS, we don't need the /dev/tty pseudo-driver to do more than return ENXIO from its open routine, so most of this file is unneeded. A straight #ifdef'ing would look quite messy, and make the file quite unreadable, so instead I have simply added the DEVFS version of the file at the top, protected by #ifndef NODEVFS. Once we have removed NODEVFS option, we can retain 86 the 86 lines at the top and drop the other 287 lines.
2003-01-19 10:23:47 +00:00
#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 = {
Gigacommit to improve device-driver source compatibility between branches: Initialize struct cdevsw using C99 sparse initializtion and remove all initializations to default values. This patch is automatically generated and has been tested by compiling LINT with all the fields in struct cdevsw in reverse order on alpha, sparc64 and i386. Approved by: re(scottl)
2003-03-03 12:15:54 +00:00
.d_open = cttyopen,
.d_name = "ctty",
.d_maj = CDEV_MAJOR,
.d_flags = D_TTY,
When we use DEVFS, we don't need the /dev/tty pseudo-driver to do more than return ENXIO from its open routine, so most of this file is unneeded. A straight #ifdef'ing would look quite messy, and make the file quite unreadable, so instead I have simply added the DEVFS version of the file at the top, protected by #ifndef NODEVFS. Once we have removed NODEVFS option, we can retain 86 the 86 lines at the top and drop the other 287 lines.
2003-01-19 10:23:47 +00:00
};
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;
Don't dereference null vnode pointer if controling terminal was revoked. Submitted by: "Peter Edwards" <pmedwards@eircom.net>
2003-01-27 16:54:17 +00:00
if (!(curthread->td_proc->p_flag & P_CONTROLT))
*dev = ctty;
else if (curthread->td_proc->p_session->s_ttyvp == NULL)
When we use DEVFS, we don't need the /dev/tty pseudo-driver to do more than return ENXIO from its open routine, so most of this file is unneeded. A straight #ifdef'ing would look quite messy, and make the file quite unreadable, so instead I have simply added the DEVFS version of the file at the top, protected by #ifndef NODEVFS. Once we have removed NODEVFS option, we can retain 86 the 86 lines at the top and drop the other 287 lines.
2003-01-19 10:23:47 +00:00
*dev = ctty;
Don't dereference null vnode pointer if controling terminal was revoked. Submitted by: "Peter Edwards" <pmedwards@eircom.net>
2003-01-27 16:54:17 +00:00
else
*dev = curthread->td_proc->p_session->s_ttyvp->v_rdev;
When we use DEVFS, we don't need the /dev/tty pseudo-driver to do more than return ENXIO from its open routine, so most of this file is unneeded. A straight #ifdef'ing would look quite messy, and make the file quite unreadable, so instead I have simply added the DEVFS version of the file at the top, protected by #ifndef NODEVFS. Once we have removed NODEVFS option, we can retain 86 the 86 lines at the top and drop the other 287 lines.
2003-01-19 10:23:47 +00:00
}
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)
Reference in New Issue Copy Permalink