xnu-2050.48.11.tar.gz

[apple/xnu.git] / bsd / kern / tty_compat.c

diff --git a/bsd/kern/tty_compat.c b/bsd/kern/tty_compat.c
index 346ac762b224b3bf11af21c67a125e746910291a..6cab324acf6ace63799dfb2bfe7eeb7f9374079d 100644 (file)
--- a/bsd/kern/tty_compat.c
+++ b/bsd/kern/tty_compat.c
@@ -1,23 +1,29 @@
 /*
  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
  *
 /*
  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
  *

- * @APPLE_LICENSE_HEADER_START@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@

  * 
  * 

- * The contents of this file constitute Original Code as defined in and
- * are subject to the Apple Public Source License Version 1.1 (the
- * "License").  You may not use this file except in compliance with the
- * License.  Please obtain a copy of the License at
- * http://www.apple.com/publicsource and read it before using this file.
+ * 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. 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.

  * 
  * 

- * This Original Code and all software distributed under the License are
- * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * 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

  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,

- * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
- * License for the specific language governing rights and limitations
- * under the License.
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * 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) 1997 Apple Computer, Inc. All Rights Reserved */
 /*-
  */
 /* Copyright (c) 1997 Apple Computer, Inc. All Rights Reserved */
 /*-


@@ -56,7 +62,15 @@
  */
 
 /*
  */
 
 /*

- * mapping routines for old line discipline (yuck)
+ * Compatibility routines for BSD 4.3 tty ioctl() commands
+ *
+ * The only function externalized from this file is ttcompat() and it is
+ * externalized as private extern to prevent exporting of the symbol when
+ * KEXTs link against the kernel.
+ *
+ * Locks:      All functions in this file assume that the tty_lock()
+ *             is held on the tty structure before these functions are
+ *             called.

  */
 
 #include <sys/param.h>
  */
 
 #include <sys/param.h>


@@ -71,9 +85,6 @@
 #include <sys/sysctl.h>
 #include <sys/syslog.h>
 
 #include <sys/sysctl.h>
 #include <sys/syslog.h>
 

-/* NeXT Move define down here cause COMPAT_43_TTY not valid earlier */
-#if COMPAT_43_TTY || defined(COMPAT_SUNOS)
-

 static int ttcompatgetflags(struct tty *tp);
 static void ttcompatsetflags(struct tty        *tp, struct termios *t);
 static void ttcompatsetlflags(struct tty *tp, struct termios *t);
 static int ttcompatgetflags(struct tty *tp);
 static void ttcompatsetflags(struct tty        *tp, struct termios *t);
 static void ttcompatsetlflags(struct tty *tp, struct termios *t);


@@ -146,6 +157,7 @@ ttcompatspeedtab(int speed, struct speedtab *table)
        return (1); /* 50, min and not hangup */
 }
 
        return (1); /* 50, min and not hangup */
 }
 

+

 /*
  * ttsetcompat
  *
 /*
  * ttsetcompat
  *


@@ -161,8 +173,8 @@ ttcompatspeedtab(int speed, struct speedtab *table)
  *             TIOCLSET        ->      TIOCSETA
  *
  *     The converted command argument and potentially modified 'term'
  *             TIOCLSET        ->      TIOCSETA
  *
  *     The converted command argument and potentially modified 'term'

- *     argument are returned to the caller, which will then call ttioctl(),
- *     if this function returns successfully.
+ *     argument are returned to ttcompat(), which will then call
+ *     ttioctl_locked(), if this function returns successfully.

  *
  * Parameters  struct tty *tp          The tty on which the operation is
  *                                     being performed.
  *
  * Parameters  struct tty *tp          The tty on which the operation is
  *                                     being performed.


@@ -186,11 +198,16 @@ ttcompatspeedtab(int speed, struct speedtab *table)
  *             TIOCLBIC, or TIOCLSET.
  *
  *             All other tp fields will remain unmodifed, since the struct
  *             TIOCLBIC, or TIOCLSET.
  *
  *             All other tp fields will remain unmodifed, since the struct

- *             termious is a local stack copy from ttcompat(), and not the
- *             real thing.  A subsequent call to ttioctl() in ttcompat(),
- *             however, may result in subsequent changes.
+ *             termios is a local stack copy from ttcompat(), and not the
+ *             real thing.  A subsequent call to ttioctl_locked() in
+ *             ttcompat(), however, may result in subsequent changes.
+ *
+ * WARNING:    This compatibility code is not 6/432 clean; it will only
+ *             work for 32 bit processes on 32 bit kernels or 64 bit
+ *             processes on 64 bit kernels.  We are not addressing this
+ *             due to <rdar://6904053>.

  */
  */

-__private_extern__ int
+static int

 ttsetcompat(struct tty *tp, u_long *com, caddr_t data, struct termios *term)
 {
        switch (*com) {
 ttsetcompat(struct tty *tp, u_long *com, caddr_t data, struct termios *term)
 {
        switch (*com) {


@@ -308,8 +325,8 @@ ttsetcompat(struct tty *tp, u_long *com, caddr_t data, struct termios *term)
  * ttcompat
  *
  * Description:        For 'set' commands, convert the command and arguments as
  * ttcompat
  *
  * Description:        For 'set' commands, convert the command and arguments as

- *             necessary, and call ttioctl(), returning the result as
- *             our result; for 'get' commands, obtain the requested data
+ *             necessary, and call ttioctl_locked(), returning the result
+ *             as our result; for 'get' commands, obtain the requested data

  *             from the appropriate source, and return it in the expected
  *             format.  If the command is not recognized, return EINVAL.
  *
  *             from the appropriate source, and return it in the expected
  *             format.  If the command is not recognized, return EINVAL.
  *


@@ -330,12 +347,12 @@ ttsetcompat(struct tty *tp, u_long *com, caddr_t data, struct termios *term)
  *                                     terminal with no associated session,
  *                                     or for which there is a session, but
  *                                     no session leader.
  *                                     terminal with no associated session,
  *                                     or for which there is a session, but
  *                                     no session leader.

- *             EIOCTL                  If the command cannot be handled at
+ *             ENOTTY                  If the command cannot be handled at

  *                                     this layer, this will be returned.
  *                                     this layer, this will be returned.

- *             *                       Any value returned by ttioctl(), if a
- *                                     set command is requested.
+ *             *                       Any value returned by ttioctl_locked(),
+ *                                     if a set command is requested.

  *
  *

- * NOTES:      The process pointer may be a proxy on whose behalf we are
+ * Notes:      The process pointer may be a proxy on whose behalf we are

  *             operating, so it is not safe to simply use current_process()
  *             instead.
  */
  *             operating, so it is not safe to simply use current_process()
  *             instead.
  */


@@ -362,7 +379,7 @@ ttcompat(struct tty *tp, u_long com, caddr_t data, int flag, struct proc *p)
                term = tp->t_termios;
                if ((error = ttsetcompat(tp, &com, data, &term)) != 0)
                        return error;
                term = tp->t_termios;
                if ((error = ttsetcompat(tp, &com, data, &term)) != 0)
                        return error;

-               return ttioctl(tp, com, (caddr_t) &term, flag, p);
+               return ttioctl_locked(tp, com, (caddr_t) &term, flag, p);

        }
        case TIOCGETP:
                /*
        }
        case TIOCGETP:
                /*


@@ -444,7 +461,7 @@ ttcompat(struct tty *tp, u_long com, caddr_t data, int flag, struct proc *p)
            {
                int ldisczero = 0;
 
            {
                int ldisczero = 0;
 

-               return (ttioctl(tp, TIOCSETD, 
+               return (ttioctl_locked(tp, TIOCSETD, 

                    *(int *)data == 2 ? (caddr_t)&ldisczero : data, flag, p));
            }
 
                    *(int *)data == 2 ? (caddr_t)&ldisczero : data, flag, p));
            }
 


@@ -453,7 +470,7 @@ ttcompat(struct tty *tp, u_long com, caddr_t data, int flag, struct proc *p)
                 * Become the console device.
                 */
                *(int *)data = 1;
                 * Become the console device.
                 */
                *(int *)data = 1;

-               return (ttioctl(tp, TIOCCONS, data, flag, p));
+               return (ttioctl_locked(tp, TIOCCONS, data, flag, p));

 
        case TIOCGSID:
                /*
 
        case TIOCGSID:
                /*


@@ -735,4 +752,3 @@ ttcompatsetlflags(struct tty *tp, struct termios *t)
        t->c_lflag = lflag;
        t->c_cflag = cflag;
 }
        t->c_lflag = lflag;
        t->c_cflag = cflag;
 }

-#endif /* COMPAT_43_TTY || COMPAT_SUNOS */