/*
- * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2006 Apple Computer, Inc. All rights reserved.
*
- * @APPLE_LICENSE_HEADER_START@
- *
- * Copyright (c) 1999-2003 Apple Computer, Inc. All Rights Reserved.
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
* This file contains Original Code and/or Modifications of Original Code
* as defined in and that are subject to the Apple Public Source License
* Version 2.0 (the 'License'). You may not use this file except in
- * compliance with the License. Please obtain a copy of the License at
- * http://www.opensource.apple.com/apsl/ and read it before using this
- * file.
+ * compliance with the License. The rights granted to you under the License
+ * may not be used to create, or enable the creation or redistribution of,
+ * unlawful or unlicensed copies of an Apple operating system, or to
+ * circumvent, violate, or enable the circumvention or violation of, any
+ * terms of an Apple operating system software license agreement.
+ *
+ * Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this file.
*
* The Original Code and all software distributed under the License are
* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* Please see the License for the specific language governing rights and
* limitations under the License.
*
- * @APPLE_LICENSE_HEADER_END@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
-/*
- * Copyright (c) 1987, 1988 NeXT, Inc.
- *
- * HISTORY
- * 7-Jan-93 Mac Gillon (mgillon) at NeXT
- * Integrated POSIX support
- *
- * 12-Aug-87 John Seamons (jks) at NeXT
- * Ported to NeXT.
- */
/*
- * Indirect driver for console.
+ * Indirect driver for console
+ *
+ * The purpose of this driver is to provide a device node indirection for
+ * the console device, which can be any tty class device. It does this by
+ * externalizing a global pointer "constty", which is then pointed at the
+ * console tty device.
+ *
+ * The default for this pointer is uninitialized; when it is NULL, we fall
+ * back to the "km" device, which is a tty BSD wrapper device for the
+ * Platform Expert console device. When it is non-NULL, we call through
+ * to the tty device device instead.
+ *
+ * The registration for this device node is static, and the devfs init
+ * code does not externalize a named device for it, to avoid software
+ * seeing the device and trying to open it.
+ *
+ * The upshot of this is that the console driver should not be set as your
+ * controlling tty, since you will get a reference to a device which does
+ * not have an actual device node in /dev, so its name cannot be looked up.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/proc.h>
#include <sys/uio.h>
-struct tty cons;
struct tty *constty; /* current console device */
-/*ARGSUSED*/
-int
-cnopen(dev, flag, devtype, pp)
- dev_t dev;
- int flag, devtype;
- struct proc *pp;
-{
- dev_t device;
-
- if (constty)
- device = constty->t_dev;
- else
- device = cons.t_dev;
- return ((*cdevsw[major(device)].d_open)(device, flag, devtype, pp));
-}
+/*
+ * The km driver supplied the default console device for the systems
+ * (usually a raw frame buffer driver, but potentially a serial driver).
+ */
+extern struct tty *km_tty[1];
-/*ARGSUSED*/
-int
-cnclose(dev, flag, mode, pp)
- dev_t dev;
- int flag, mode;
- struct proc *pp;
+/*
+ * cdevsw[] entries for the console device driver
+ */
+int cnopen(__unused dev_t dev, int flag, int devtype, proc_t pp);
+int cnclose(__unused dev_t dev, int flag, int mode, proc_t pp);
+int cnread(__unused dev_t dev, struct uio *uio, int ioflag);
+int cnwrite(__unused dev_t dev, struct uio *uio, int ioflag);
+int cnioctl(__unused dev_t dev, u_long cmd, caddr_t addr, int flg, proc_t p);
+int cnselect(__unused dev_t dev, int flag, void * wql, proc_t p);
+
+static dev_t
+cndev(void)
{
- dev_t device;
-
if (constty)
- device = constty->t_dev;
+ return constty->t_dev;
else
- device = cons.t_dev;
- return ((*cdevsw[major(device)].d_close)(device, flag, mode, pp));
+ return km_tty[0]->t_dev;
}
-/*ARGSUSED*/
int
-cnread(dev, uio, ioflag)
- dev_t dev;
- struct uio *uio;
- int ioflag;
+cnopen(__unused dev_t dev, int flag, int devtype, struct proc *pp)
{
- dev_t device;
-
- if (constty)
- device = constty->t_dev;
- else
- device = cons.t_dev;
- return ((*cdevsw[major(device)].d_read)(device, uio, ioflag));
+ dev = cndev();
+ return ((*cdevsw[major(dev)].d_open)(dev, flag, devtype, pp));
}
-/*ARGSUSED*/
-int
-cnwrite(dev, uio, ioflag)
- dev_t dev;
- struct uio *uio;
- int ioflag;
-{
- dev_t device;
-
- if (constty)
- device = constty->t_dev;
- else
- device = cons.t_dev;
- return ((*cdevsw[major(device)].d_write)(device, uio, ioflag));
-}
-/*ARGSUSED*/
int
-cnioctl(dev, cmd, addr, flag, p)
- dev_t dev;
- int cmd;
- caddr_t addr;
- int flag;
- struct proc *p;
+cnclose(__unused dev_t dev, int flag, int mode, struct proc *pp)
{
- dev_t device;
-
- if (constty)
- device = constty->t_dev;
- else
- device = cons.t_dev;
- /*
- * Superuser can always use this to wrest control of console
- * output from the "virtual" console.
- */
- if (cmd == TIOCCONS && constty) {
- int error = suser(p->p_ucred, (u_short *) NULL);
- if (error)
- return (error);
- constty = NULL;
- return (0);
- }
- return ((*cdevsw[major(device)].d_ioctl)(device, cmd, addr, flag, p));
+ dev = cndev();
+ return ((*cdevsw[major(dev)].d_close)(dev, flag, mode, pp));
}
-/*ARGSUSED*/
-int
-cnselect(dev, flag, wql, p)
- dev_t dev;
- int flag;
- void * wql;
- struct proc *p;
-{
- dev_t device;
- if (constty)
- device = constty->t_dev;
- else
- device = cons.t_dev;
- return ((*cdevsw[major(device)].d_select)(device, flag, wql, p));
-}
-
-#if 0 /* FIXME - using OSFMK console driver for the moment */
int
-cngetc()
+cnread(__unused dev_t dev, struct uio *uio, int ioflag)
{
- dev_t device;
-
- if (constty)
- device = constty->t_dev;
- else
- device = cons.t_dev;
- return ((*cdevsw[major(device)].d_getc)(device));
+ dev = cndev();
+ return ((*cdevsw[major(dev)].d_read)(dev, uio, ioflag));
}
-/*ARGSUSED*/
+
int
-cnputc(c)
- char c;
+cnwrite(__unused dev_t dev, struct uio *uio, int ioflag)
{
- dev_t device;
-
- if (constty)
- device = constty->t_dev;
- else
- device = cons.t_dev;
- return ((*cdevsw[major(device)].d_putc)(device, c));
+ dev = cndev();
+ return ((*cdevsw[major(dev)].d_write)(dev, uio, ioflag));
}
-#endif
-#if NCPUS > 1
-slave_cnenable()
-{
- /* FIXME: what to do here? */
-}
-#endif NCPUS > 1
-#if 0
-void
-kprintf( const char *format, ...)
+int
+cnioctl(__unused dev_t dev, u_long cmd, caddr_t addr, int flag, struct proc *p)
{
- /* on PPC this outputs to the serial line */
- /* nop on intel ... umeshv@apple.com */
+ dev = cndev();
+#if 0
+ /*
+ * Superuser can always use this to wrest control of console
+ * output from the "virtual" console.
+ *
+ * XXX Unfortunately, this code doesn't do what the author thougt
+ * XXX it did; use of the console device, a TIOCCONS would always
+ * XXX disassociate the console from a virtual terminal and send
+ * XXX it back to the fake tty.
+ */
+ if ((unsigned) cmd == TIOCCONS && constty) {
+ int error = proc_suser(p);
+ if (!error) {
+ constty = NULL;
+ }
+ return(error);
+ }
+#endif /* 0 */
+ return ((*cdevsw[major(dev)].d_ioctl)(dev, cmd, addr, flag, p));
}
-#endif
-/*
- * Write message to console; create an alert panel if no text-type window
- * currently exists. Caller must call alert_done() when finished.
- * The height and width arguments are not used; they are provided for
- * compatibility with the 68k version of alert().
- */
-int
-alert(
- int width,
- int height,
- const char *title,
- const char *msg,
- int p1,
- int p2,
- int p3,
- int p4,
- int p5,
- int p6,
- int p7,
- int p8)
-{
- char smsg[200];
-
- sprintf(smsg, msg, p1, p2, p3, p4, p5, p6, p7, p8);
-#if FIXME /* [ */
- /* DoAlert(title, smsg); */
-#else
- printf("%s\n",smsg);
-#endif /* FIXME ] */
-
- return 0;
-}
-int
-alert_done()
+int
+cnselect(__unused dev_t dev, int flag, void *wql, struct proc *p)
{
- /* DoRestore(); */
- return 0;
+ dev = cndev();
+ return ((*cdevsw[major(dev)].d_select)(dev, flag, wql, p));
}
-
projects / apple / xnu.git / blobdiff