xnu-4570.1.46.tar.gz

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

diff --git a/bsd/kern/tty_pty.c b/bsd/kern/tty_pty.c
index 5ec154c6745a52cb56c032cb8a6b7f1bf3c4126a..c5f899a46e108f1e6c2dfd9aaf9dc37379defda1 100644 (file)
--- a/bsd/kern/tty_pty.c
+++ b/bsd/kern/tty_pty.c
@@ -1,25 +1,30 @@
 /*
 /*

- * Copyright (c) 2000-2004 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 1997-2013 Apple 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) 1982, 1986, 1989, 1993
  *      The Regents of the University of California.  All rights reserved.
 /*
  * Copyright (c) 1982, 1986, 1989, 1993
  *      The Regents of the University of California.  All rights reserved.


@@ -69,62 +74,17 @@
 #include <sys/tty.h>
 #include <sys/conf.h>
 #include <sys/file_internal.h>
 #include <sys/tty.h>
 #include <sys/conf.h>
 #include <sys/file_internal.h>

-#include <sys/uio.h>
+#include <sys/uio_internal.h>

 #include <sys/kernel.h>
 #include <sys/vnode.h>
 #include <sys/user.h>
 #include <sys/signalvar.h>
 
 #include <sys/kernel.h>
 #include <sys/vnode.h>
 #include <sys/user.h>
 #include <sys/signalvar.h>
 

-#ifndef NeXT
-
-#define FREE_BSDSTATIC static
-#else
-#define FREE_BSDSTATIC __private_extern__
-#define d_devtotty_t    struct tty **
-
-#ifdef d_stop_t
-#undef d_stop_t
+#if CONFIG_MACF
+#include <security/mac_framework.h>

 #endif
 #endif

-typedef void d_stop_t(struct tty *tp, int rw);
-
-#endif /* NeXT */
-
-/* XXX function should be removed??? */
-int pty_init(int n_ptys);
-
-#ifdef notyet
-static void ptyattach(int n);
-#endif
-static void ptsstart(struct tty *tp);
-static void ptcwakeup(struct tty *tp, int flag);
-
-FREE_BSDSTATIC d_open_t        ptsopen;
-FREE_BSDSTATIC d_close_t       ptsclose;
-FREE_BSDSTATIC d_read_t        ptsread;
-FREE_BSDSTATIC d_write_t       ptswrite;
-FREE_BSDSTATIC d_ioctl_t       ptyioctl;
-FREE_BSDSTATIC d_stop_t        ptsstop;
-FREE_BSDSTATIC d_devtotty_t    ptydevtotty;
-FREE_BSDSTATIC d_open_t        ptcopen;
-FREE_BSDSTATIC d_close_t       ptcclose;
-FREE_BSDSTATIC d_read_t        ptcread;
-FREE_BSDSTATIC d_write_t       ptcwrite;
-FREE_BSDSTATIC d_select_t      ptcselect;
-
-#ifndef NeXT
-#define CDEV_MAJOR_S 5
-#define CDEV_MAJOR_C 6
-static struct cdevsw pts_cdevsw = 
-       { ptsopen,      ptsclose,       ptsread,        ptswrite,       /*5*/
-         ptyioctl,     ptsstop,        nullreset,      ptydevtotty,/* ttyp */
-         ttselect,     nommap,         NULL,   "pts",  NULL,   -1 };
-
-static struct cdevsw ptc_cdevsw = 
-       { ptcopen,      ptcclose,       ptcread,        ptcwrite,       /*6*/
-         ptyioctl,     nullstop,       nullreset,      ptydevtotty,/* ptyp */
-         ptcselect,    nommap,         NULL,   "ptc",  NULL,   -1 };
-#endif /* !NeXT */

 
 

+#include "tty_dev.h"

 
 #if NPTY == 1
 #undef NPTY
 
 #if NPTY == 1
 #undef NPTY


@@ -132,915 +92,91 @@ static struct cdevsw ptc_cdevsw =
 #warning       You have only one pty defined, redefining to 32.
 #endif
 
 #warning       You have only one pty defined, redefining to 32.
 #endif
 

-#ifndef NeXT
-#ifdef DEVFS
-#define MAXUNITS (8 * 32)
-static void    *devfs_token_pts[MAXUNITS];
-static void    *devfs_token_ptc[MAXUNITS];
-static  const  char jnames[] = "pqrsPQRS";
-#if NPTY > MAXUNITS
-#undef NPTY
-#define NPTY MAXUNITS
-#warning       Can't have more than 256 pty's with DEVFS defined.
-#endif /* NPTY > MAXUNITS */
-#endif /* DEVFS */
-#endif /* !NeXT */
-
-#define BUFSIZ 100             /* Chunk size iomoved to/from user */
-
-/*
- * pts == /dev/tty[pqrsPQRS][0123456789abcdefghijklmnopqrstuv]
- * ptc == /dev/pty[pqrsPQRS][0123456789abcdefghijklmnopqrstuv]
- */
-#ifndef NeXT
-FREE_BSDSTATIC struct  tty pt_tty[NPTY];       /* XXX */
-#else /* NeXT */
-/* NeXT All references to have been changed to indirections in the file */
-FREE_BSDSTATIC struct  tty *pt_tty[NPTY] = { NULL };
-#endif /* ! NeXT */
-
-static struct  pt_ioctl {
-       int     pt_flags;
-       struct  selinfo pt_selr, pt_selw;
-       u_char  pt_send;
-       u_char  pt_ucntl;
-} pt_ioctl[NPTY];              /* XXX */
-static int     npty = NPTY;            /* for pstat -t */
-
-#define        PF_PKT          0x08            /* packet mode */
-#define        PF_STOPPED      0x10            /* user told stopped */
-#define        PF_REMOTE       0x20            /* remote and flow controlled input */
-#define        PF_NOSTOP       0x40
-#define PF_UCNTL       0x80            /* user control mode */
-
-#ifdef notyet

 /*
 /*

- * Establish n (or default if n is 1) ptys in the system.
- *
- * XXX cdevsw & pstat require the array `pty[]' to be an array
+ * pts == /dev/tty[pqrsPQRS][0-9a-v]
+ * ptc == /dev/pty[pqrsPQRS][0-9a-v]

  */
  */

-FREEBSD_STATIC void
-ptyattach(n)
-       int n;
-{
-       char *mem;
-       register u_long ntb;
-#define        DEFAULT_NPTY    32
+static struct ptmx_ioctl pt_ioctl[NPTY];

 
 

-       /* maybe should allow 0 => none? */
-       if (n <= 1)
-               n = DEFAULT_NPTY;
-       ntb = n * sizeof(struct tty);
-#ifndef NeXT
-       mem = malloc(ntb + ALIGNBYTES + n * sizeof(struct pt_ioctl),
-           M_DEVBUF, M_WAITOK);
-#else
-       MALLOC(mem, char *, ntb + ALIGNBYTES + n * sizeof(struct pt_ioctl),
-                       M_DEVBUF, M_WAITOK);
-#endif /* !NeXT */
-       pt_tty = (struct tty *)mem;
-       mem = (char *)ALIGN(mem + ntb);
-       pt_ioctl = (struct pt_ioctl *)mem;
-       npty = n;
-}
-#endif
+int pty_init(int n_ptys);

 
 #ifndef DEVFS
 int
 pty_init(__unused int n_ptys)
 {
 
 #ifndef DEVFS
 int
 pty_init(__unused int n_ptys)
 {

-    return 0;
+       return 0;

 }
 }

-#else
+#else // DEVFS

 #include <miscfs/devfs/devfs.h>
 #define START_CHAR     'p'
 #define HEX_BASE       16
 #include <miscfs/devfs/devfs.h>
 #define START_CHAR     'p'
 #define HEX_BASE       16

-int
-pty_init(int n_ptys)
-{
-    int        i;
-    int                j;
-
-    /* create the pseudo tty device nodes */
-    for (j = 0; j < 10; j++) {
-       for (i = 0; i < HEX_BASE; i++) {
-           int m = j * HEX_BASE + i;
-           if (m == n_ptys)
-               goto done;
-           (void)devfs_make_node(makedev(4, m), 
-                                 DEVFS_CHAR, UID_ROOT, GID_WHEEL, 0666, 
-                                 "tty%c%x", j + START_CHAR, i);
-           (void)devfs_make_node(makedev(5, m), 
-                                 DEVFS_CHAR, UID_ROOT, GID_WHEEL, 0666, 
-                                 "pty%c%x", j + START_CHAR, i);
-       }
-    }
- done:
-    return (0);
-}
-#endif /* DEVFS */
-
-/*ARGSUSED*/
-FREE_BSDSTATIC int
-ptsopen(dev_t dev, int flag, __unused int devtype, __unused struct proc *p)
-{
-       register struct tty *tp;
-       int error;
-       boolean_t   funnel_state;
-
-       funnel_state = thread_funnel_set(kernel_flock, TRUE);
-#ifndef NeXT
-       tp = &pt_tty[minor(dev)];
-#else
-       /*
-        * You will see this sort of code coming up in diffs later both
-        * the ttymalloc and the tp indirection.
-        */
-       if (minor(dev) >= npty) {
-               error = ENXIO;
-               goto out;
-       }
-       if (!pt_tty[minor(dev)]) {
-               tp = pt_tty[minor(dev)] = ttymalloc();
-       } else
-               tp = pt_tty[minor(dev)];
-#endif
-       if ((tp->t_state & TS_ISOPEN) == 0) {
-               ttychars(tp);           /* Set up default chars */
-               tp->t_iflag = TTYDEF_IFLAG;
-               tp->t_oflag = TTYDEF_OFLAG;
-               tp->t_lflag = TTYDEF_LFLAG;
-               tp->t_cflag = TTYDEF_CFLAG;
-               tp->t_ispeed = tp->t_ospeed = TTYDEF_SPEED;
-               ttsetwater(tp);         /* would be done in xxparam() */
-       } else if (tp->t_state&TS_XCLUDE && suser(kauth_cred_get(), NULL)) {
-               error = EBUSY;
-               goto out;
-       }
-       if (tp->t_oproc)                        /* Ctrlr still around. */
-               (void)(*linesw[tp->t_line].l_modem)(tp, 1);
-       while ((tp->t_state & TS_CARR_ON) == 0) {
-               if (flag&FNONBLOCK)
-                       break;
-               error = ttysleep(tp, TSA_CARR_ON(tp), TTIPRI | PCATCH,
-                                "ptsopn", 0);
-               if (error)
-                       goto out;
-       }
-       error = (*linesw[tp->t_line].l_open)(dev, tp);
-       if (error == 0)
-               ptcwakeup(tp, FREAD|FWRITE);
-out:
-       (void) thread_funnel_set(kernel_flock, funnel_state);
-       return (error);
-}
-
-FREE_BSDSTATIC int
-ptsclose(dev_t dev, int flag, __unused int mode, __unused proc_t p)
-{
-       register struct tty *tp;
-       int err;
-       boolean_t   funnel_state;
-
-       funnel_state = thread_funnel_set(kernel_flock, TRUE);
-
-       tp = pt_tty[minor(dev)];
-       err = (*linesw[tp->t_line].l_close)(tp, flag);
-       ptsstop(tp, FREAD|FWRITE);
-       (void) ttyclose(tp);

 
 

-       (void) thread_funnel_set(kernel_flock, funnel_state);
-       return (err);
-}
-
-FREE_BSDSTATIC int
-ptsread(dev, uio, flag)
-       dev_t dev;
-       struct uio *uio;
-       int flag;
-{
-#ifndef NeXT
-       struct proc *p = curproc;
-#else
-       struct proc *p = current_proc();
-#endif /* NeXT */
-       register struct tty *tp = pt_tty[minor(dev)];
-       register struct pt_ioctl *pti = &pt_ioctl[minor(dev)];
-       int error = 0;
-       struct uthread *ut;
-       boolean_t   funnel_state;
-
-       funnel_state = thread_funnel_set(kernel_flock, TRUE);
-
-
-       ut = (struct uthread *)get_bsdthread_info(current_thread());
-again:
-       if (pti->pt_flags & PF_REMOTE) {
-               while (isbackground(p, tp)) {
-                       if ((p->p_sigignore & sigmask(SIGTTIN)) ||
-                           (ut->uu_sigmask & sigmask(SIGTTIN)) ||
-                           p->p_pgrp->pg_jobc == 0 ||
-                           p->p_flag & P_PPWAIT) {
-                               error = EIO;
-                               goto out;
-                       }
-                       pgsignal(p->p_pgrp, SIGTTIN, 1);
-                       error = ttysleep(tp, &lbolt, TTIPRI | PCATCH | PTTYBLOCK, "ptsbg",
-                                        0);
-                       if (error)
-                               goto out;
-               }
-               if (tp->t_canq.c_cc == 0) {
-                       if (flag & IO_NDELAY)
-                               return (EWOULDBLOCK);
-                       error = ttysleep(tp, TSA_PTS_READ(tp), TTIPRI | PCATCH,
-                                        "ptsin", 0);
-                       if (error)
-                               goto out;
-                       goto again;
-               }
-               while (tp->t_canq.c_cc > 1 && uio_resid(uio) > 0) {
-                       int cc;
-                       char buf[BUFSIZ];
-
-                       cc = min(uio_resid(uio), BUFSIZ);
-                       // Don't copy the very last byte
-                       cc = min(cc, tp->t_canq.c_cc - 1);
-                       cc = q_to_b(&tp->t_canq, buf, cc);
-                       error = uiomove(buf, cc, uio);
-                       if (error)
-                               break;
-               }
-               if (tp->t_canq.c_cc == 1)
-                       (void) getc(&tp->t_canq);
-               if (tp->t_canq.c_cc)
-                       goto out;
-       } else
-               if (tp->t_oproc)
-                       error = (*linesw[tp->t_line].l_read)(tp, uio, flag);
-       ptcwakeup(tp, FWRITE);
-out:
-       (void) thread_funnel_set(kernel_flock, funnel_state);
-       return (error);
-}
-
-/*
- * Write to pseudo-tty.
- * Wakeups of controlling tty will happen
- * indirectly, when tty driver calls ptsstart.
- */
-FREE_BSDSTATIC int
-ptswrite(dev, uio, flag)
-       dev_t dev;
-       struct uio *uio;
-       int flag;
-{
-       register struct tty *tp;
-       int error;
-       boolean_t   funnel_state;
-
-       funnel_state = thread_funnel_set(kernel_flock, TRUE);
-
-       tp = pt_tty[minor(dev)];
-       if (tp->t_oproc == 0)
-               error = EIO;
-       else
-               error = (*linesw[tp->t_line].l_write)(tp, uio, flag);
-
-       (void) thread_funnel_set(kernel_flock, funnel_state);
-       return (error);
-}
-
-/*
- * Start output on pseudo-tty.
- * Wake up process selecting or sleeping for input from controlling tty.
- */
-static void
-ptsstart(tp)
-       struct tty *tp;
-{
-       register struct pt_ioctl *pti = &pt_ioctl[minor(tp->t_dev)];
-       boolean_t   funnel_state;
-
-       funnel_state = thread_funnel_set(kernel_flock, TRUE);
-
-       if (tp->t_state & TS_TTSTOP)
-               goto out;
-       if (pti->pt_flags & PF_STOPPED) {
-               pti->pt_flags &= ~PF_STOPPED;
-               pti->pt_send = TIOCPKT_START;
-       }
-       ptcwakeup(tp, FREAD);
-out:
-       (void) thread_funnel_set(kernel_flock, funnel_state);
-       return;
-}
-
-static void
-ptcwakeup(tp, flag)
-       struct tty *tp;
-       int flag;
-{
-       struct pt_ioctl *pti = &pt_ioctl[minor(tp->t_dev)];
-       boolean_t   funnel_state;
-
-       funnel_state = thread_funnel_set(kernel_flock, TRUE);
-
-       if (flag & FREAD) {
-               selwakeup(&pti->pt_selr);
-               wakeup(TSA_PTC_READ(tp));
-       }
-       if (flag & FWRITE) {
-               selwakeup(&pti->pt_selw);
-               wakeup(TSA_PTC_WRITE(tp));
-       }
-       (void) thread_funnel_set(kernel_flock, funnel_state);
-}
-
-FREE_BSDSTATIC int
-ptcopen(dev_t dev, __unused int flag, __unused int devtype, __unused proc_t p)
-{
-       register struct tty *tp;
-       struct pt_ioctl *pti;
-       int error = 0;
-       boolean_t   funnel_state;
-
-       funnel_state = thread_funnel_set(kernel_flock, TRUE);
-
-       if (minor(dev) >= npty) {
-               error = ENXIO;
-               goto out;
-       }
-       if(!pt_tty[minor(dev)]) {
-               tp = pt_tty[minor(dev)] = ttymalloc();
-       } else
-               tp = pt_tty[minor(dev)];
-       if (tp->t_oproc) {
-               error = EIO;
-               goto out;
-       }
-       tp->t_oproc = ptsstart;
-#ifdef sun4c
-       tp->t_stop = ptsstop;
-#endif
-       (void)(*linesw[tp->t_line].l_modem)(tp, 1);
-       tp->t_lflag &= ~EXTPROC;
-       pti = &pt_ioctl[minor(dev)];
-       pti->pt_flags = 0;
-       pti->pt_send = 0;
-       pti->pt_ucntl = 0;
-out:
-       (void) thread_funnel_set(kernel_flock, funnel_state);
-       return (error);
-}
+static struct tty_dev_t _pty_driver;

 
 

-FREE_BSDSTATIC int
-ptcclose(dev_t dev, __unused int flags, __unused int fmt, __unused proc_t p)
+static struct ptmx_ioctl *
+pty_get_ioctl(int minor, int open_flag)

 {
 {

-       register struct tty *tp;
-       boolean_t   funnel_state;
-
-       funnel_state = thread_funnel_set(kernel_flock, TRUE);
-
-       tp = pt_tty[minor(dev)];
-       (void)(*linesw[tp->t_line].l_modem)(tp, 0);
-
-       /*
-        * XXX MDMBUF makes no sense for ptys but would inhibit the above
-        * l_modem().  CLOCAL makes sense but isn't supported.   Special
-        * l_modem()s that ignore carrier drop make no sense for ptys but
-        * may be in use because other parts of the line discipline make
-        * sense for ptys.  Recover by doing everything that a normal
-        * ttymodem() would have done except for sending a SIGHUP.
-        */
-       if (tp->t_state & TS_ISOPEN) {
-               tp->t_state &= ~(TS_CARR_ON | TS_CONNECTED);
-               tp->t_state |= TS_ZOMBIE;
-               ttyflush(tp, FREAD | FWRITE);
+       if (minor >= NPTY) {
+               return NULL;

        }
        }

-
-       tp->t_oproc = 0;                /* mark closed */
-
-       (void) thread_funnel_set(kernel_flock, funnel_state);
-       return (0);
-}
-
-FREE_BSDSTATIC int
-ptcread(dev, uio, flag)
-       dev_t dev;
-       struct uio *uio;
-       int flag;
-{
-       register struct tty *tp = pt_tty[minor(dev)];
-       struct pt_ioctl *pti = &pt_ioctl[minor(dev)];
-       char buf[BUFSIZ];
-       int error = 0, cc;
-       boolean_t   funnel_state;
-
-       funnel_state = thread_funnel_set(kernel_flock, TRUE);
-
-       /*
-        * We want to block until the slave
-        * is open, and there's something to read;
-        * but if we lost the slave or we're NBIO,
-        * then return the appropriate error instead.
-        */
-       for (;;) {
-               if (tp->t_state&TS_ISOPEN) {
-                       if (pti->pt_flags&PF_PKT && pti->pt_send) {
-                               error = ureadc((int)pti->pt_send, uio);
-                               if (error)
-                                       goto out;
-                               if (pti->pt_send & TIOCPKT_IOCTL) {
-                                       cc = min(uio_resid(uio),
-                                               sizeof(tp->t_termios));
-                                       uiomove((caddr_t)&tp->t_termios, cc,
-                                               uio);
-                               }
-                               pti->pt_send = 0;
-                               goto out;
-                       }
-                       if (pti->pt_flags&PF_UCNTL && pti->pt_ucntl) {
-                               error = ureadc((int)pti->pt_ucntl, uio);
-                               if (error)
-                                       goto out;
-                               pti->pt_ucntl = 0;
-                               goto out;
-                       }
-                       if (tp->t_outq.c_cc && (tp->t_state&TS_TTSTOP) == 0)
-                               break;
+       struct ptmx_ioctl *pti = &pt_ioctl[minor];
+       if (open_flag & (PF_OPEN_M|PF_OPEN_S)) {
+               if (!pti->pt_tty) {
+                       pti->pt_tty = ttymalloc();

                }
                }

-               if ((tp->t_state & TS_CONNECTED) == 0)
-                       goto out;       /* EOF */
-               if (flag & IO_NDELAY) {
-                       error = EWOULDBLOCK;
-                       goto out;
+               if (!pti->pt_tty) {
+                       return NULL;

                }
                }

-               error = tsleep(TSA_PTC_READ(tp), TTIPRI | PCATCH, "ptcin", 0);
-               if (error)
-                       goto out;
-       }
-       if (pti->pt_flags & (PF_PKT|PF_UCNTL))
-               error = ureadc(0, uio);
-       while (uio_resid(uio) > 0 && error == 0) {
-               cc = q_to_b(&tp->t_outq, buf, min(uio_resid(uio), BUFSIZ));
-               if (cc <= 0)
-                       break;
-               error = uiomove(buf, cc, uio);

        }
        }

-       (*linesw[tp->t_line].l_start)(tp);
-
-out:
-       (void) thread_funnel_set(kernel_flock, funnel_state);
-       return (error);
-}
-
-FREE_BSDSTATIC void
-ptsstop(tp, flush)
-       register struct tty *tp;
-       int flush;
-{
-       struct pt_ioctl *pti = &pt_ioctl[minor(tp->t_dev)];
-       int flag;
-       boolean_t   funnel_state;
-
-       funnel_state = thread_funnel_set(kernel_flock, TRUE);
-
-       /* note: FLUSHREAD and FLUSHWRITE already ok */
-       if (flush == 0) {
-               flush = TIOCPKT_STOP;
-               pti->pt_flags |= PF_STOPPED;
-       } else
-               pti->pt_flags &= ~PF_STOPPED;
-       pti->pt_send |= flush;
-       /* change of perspective */
-       flag = 0;
-       if (flush & FREAD)
-               flag |= FWRITE;
-       if (flush & FWRITE)
-               flag |= FREAD;
-       ptcwakeup(tp, flag);
-
-       (void) thread_funnel_set(kernel_flock, funnel_state);
+       return pti;

 }
 
 }
 

-FREE_BSDSTATIC int
-ptcselect(dev, rw, wql, p)
-       dev_t dev;
-       int rw;
-       void * wql;
-       struct proc *p;
+static int
+pty_get_name(int minor, char *buffer, size_t size)

 {
 {

-       register struct tty *tp = pt_tty[minor(dev)];
-       struct pt_ioctl *pti = &pt_ioctl[minor(dev)];
-       int retval = 0;
-       boolean_t   funnel_state;
-
-       funnel_state = thread_funnel_set(kernel_flock, TRUE);
-
-       if ((tp->t_state & TS_CONNECTED) == 0) {
-               retval = 1;
-               goto out;
-       }
-       switch (rw) {
-
-       case FREAD:
-               /*
-                * Need to block timeouts (ttrstart).
-                */
-               if ((tp->t_state&TS_ISOPEN) &&
-                    tp->t_outq.c_cc && (tp->t_state&TS_TTSTOP) == 0) {
-                       retval = 1;
-                       goto out;
-               }
-               /* FALLTHROUGH */
-
-       case 0:                                 /* exceptional */
-               if ((tp->t_state&TS_ISOPEN) &&
-                   ((pti->pt_flags&PF_PKT && pti->pt_send) ||
-                    (pti->pt_flags&PF_UCNTL && pti->pt_ucntl))) {
-                       retval = 1;
-                       goto out;
-               }
-               selrecord(p, &pti->pt_selr, wql);
-               break;
-
-
-       case FWRITE:
-               if (tp->t_state&TS_ISOPEN) {
-                       if (pti->pt_flags & PF_REMOTE) {
-                           if (tp->t_canq.c_cc == 0) {
-                               retval = 1;
-                               goto out;
-                           }
-                       } else {
-                           if (tp->t_rawq.c_cc + tp->t_canq.c_cc < TTYHOG-2) {
-                                   retval = 1;
-                                   goto out;
-                           }
-                           if (tp->t_canq.c_cc == 0 && (tp->t_iflag&ICANON)) {
-                                   retval = 1;
-                                   goto out;
-                           }
-                       }
-               }
-               selrecord(p, &pti->pt_selw, wql);
-               break;
-
-       }
-out:
-       (void) thread_funnel_set(kernel_flock, funnel_state);
-       return (retval);
+       return snprintf(buffer, size, "/dev/tty%c%x",
+                       START_CHAR + (minor / HEX_BASE),
+                       minor % HEX_BASE);

 }
 
 }
 

-FREE_BSDSTATIC int
-ptcwrite(dev, uio, flag)
-       dev_t dev;
-       register struct uio *uio;
-       int flag;
+int
+pty_init(int n_ptys)

 {
 {

-       register struct tty *tp = pt_tty[minor(dev)];
-       register u_char *cp = NULL;
-       register int cc = 0;
-       u_char locbuf[BUFSIZ];
-       int wcnt = 0;
-       struct pt_ioctl *pti = &pt_ioctl[minor(dev)];
-       int error = 0;
-       boolean_t   funnel_state;
+       int i;
+       int j;

 
 

-       funnel_state = thread_funnel_set(kernel_flock, TRUE);
+       n_ptys = min(n_ptys, NPTY); /* clamp to avoid pt_ioctl overflow */

 
 

-again:
-       if ((tp->t_state&TS_ISOPEN) == 0)
-               goto block;
-       if (pti->pt_flags & PF_REMOTE) {
-               if (tp->t_canq.c_cc)
-                       goto block;
-               while ((uio_resid(uio) > 0 || cc > 0) &&
-                      tp->t_canq.c_cc < TTYHOG - 1) {
-                       if (cc == 0) {
-                               cc = min(uio_resid(uio), BUFSIZ);
-                               cc = min(cc, TTYHOG - 1 - tp->t_canq.c_cc);
-                               cp = locbuf;
-                               error = uiomove((caddr_t)cp, cc, uio);
-                               if (error)
-                                       goto out;
-                               /* check again for safety */
-                               if ((tp->t_state & TS_ISOPEN) == 0) {
-                                       /* adjust as usual */
-                                       uio_setresid(uio, (uio_resid(uio) + cc));
-                                       error = EIO;
-                                       goto out;
-                               }
-                       }
-                       if (cc > 0) {
-                               cc = b_to_q((char *)cp, cc, &tp->t_canq);
-                               /*
-                                * XXX we don't guarantee that the canq size
-                                * is >= TTYHOG, so the above b_to_q() may
-                                * leave some bytes uncopied.  However, space
-                                * is guaranteed for the null terminator if
-                                * we don't fail here since (TTYHOG - 1) is
-                                * not a multiple of CBSIZE.
-                                */
-                               if (cc > 0)
-                                       break;
-                       }
-               }
-               /* adjust for data copied in but not written */
-               uio_setresid(uio, (uio_resid(uio) + cc));
-               (void) putc(0, &tp->t_canq);
-               ttwakeup(tp);
-               wakeup(TSA_PTS_READ(tp));
-               goto out;
-       }
-       while (uio_resid(uio) > 0 || cc > 0) {
-               if (cc == 0) {
-                       cc = min(uio_resid(uio), BUFSIZ);
-                       cp = locbuf;
-                       error = uiomove((caddr_t)cp, cc, uio);
-                       if (error)
-                               goto out;
-                       /* check again for safety */
-                       if ((tp->t_state & TS_ISOPEN) == 0) {
-                               /* adjust for data copied in but not written */
-                               uio_setresid(uio, (uio_resid(uio) + cc));
-                               error = EIO;
-                               goto out;
-                       }
-               }
-               while (cc > 0) {
-                       if ((tp->t_rawq.c_cc + tp->t_canq.c_cc) >= TTYHOG - 2 &&
-                          (tp->t_canq.c_cc > 0 || !(tp->t_iflag&ICANON))) {
-                               wakeup(TSA_HUP_OR_INPUT(tp));
-                               goto block;
+       /* create the pseudo tty device nodes */
+       for (j = 0; j < 10; j++) {
+               for (i = 0; i < HEX_BASE; i++) {
+                       int m = j * HEX_BASE + i;
+                       if (m >= n_ptys) {
+                               goto done;

                        }
                        }

-                       (*linesw[tp->t_line].l_rint)(*cp++, tp);
-                       wcnt++;
-                       cc--;
+                       pt_ioctl[m].pt_devhandle = devfs_make_node(makedev(PTS_MAJOR, m),
+                                       DEVFS_CHAR, UID_ROOT, GID_WHEEL, 0666,
+                                       "tty%c%x", j + START_CHAR, i);
+                       (void)devfs_make_node(makedev(PTC_MAJOR, m),
+                                       DEVFS_CHAR, UID_ROOT, GID_WHEEL, 0666,
+                                       "pty%c%x", j + START_CHAR, i);

                }
                }

-               cc = 0;

        }
        }

-out:
-       (void) thread_funnel_set(kernel_flock, funnel_state);
-       return (error);
-block:
-       /*
-        * Come here to wait for slave to open, for space
-        * in outq, or space in rawq, or an empty canq.
-        */
-       if ((tp->t_state & TS_CONNECTED) == 0) {
-               /* adjust for data copied in but not written */
-               uio_setresid(uio, (uio_resid(uio) + cc));
-               error = EIO;
-               goto out;
-       }
-       if (flag & IO_NDELAY) {
-               /* adjust for data copied in but not written */
-               uio_setresid(uio, (uio_resid(uio) + cc));
-               if (wcnt == 0)
-                       error = EWOULDBLOCK;
-               goto out;
-       }
-       error = tsleep(TSA_PTC_WRITE(tp), TTOPRI | PCATCH, "ptcout", 0);
-       if (error) {
-               /* adjust for data copied in but not written */
-               uio_setresid(uio, (uio_resid(uio) + cc));
-               goto out;
-       }
-       goto again;
-}
-
-#ifndef NeXT
-/* XXX we eventually want to go to this model,
- * but premier can't change the cdevsw */
-static struct tty *
-ptydevtotty(dev)
-       dev_t           dev;
-{
-       if (minor(dev) >= npty)
-               return (NULL);
-
-       return &pt_tty[minor(dev)];
-}
-#endif /* !NeXT */
-
-/*ARGSUSED*/
-FREE_BSDSTATIC int
-#ifndef NeXT
-ptyioctl(dev, cmd, data, flag)
-       dev_t dev;
-       int cmd;
-       caddr_t data;
-       int flag;
-#else
-ptyioctl(dev, cmd, data, flag, p)
-       dev_t dev;
-       u_long cmd;
-       caddr_t data;
-       int flag;
-       struct proc *p;
-#endif
-{
-       register struct tty *tp = pt_tty[minor(dev)];
-       register struct pt_ioctl *pti = &pt_ioctl[minor(dev)];
-       register u_char *cc = tp->t_cc;
-       int stop, error = 0;
-       boolean_t   funnel_state;
-
-       funnel_state = thread_funnel_set(kernel_flock, TRUE);
-
-       /*
-        * IF CONTROLLER STTY THEN MUST FLUSH TO PREVENT A HANG.
-        * ttywflush(tp) will hang if there are characters in the outq.
-        */
-       if (cmd == TIOCEXT) {
-               /*
-                * When the EXTPROC bit is being toggled, we need
-                * to send an TIOCPKT_IOCTL if the packet driver
-                * is turned on.
-                */
-               if (*(int *)data) {
-                       if (pti->pt_flags & PF_PKT) {
-                               pti->pt_send |= TIOCPKT_IOCTL;
-                               ptcwakeup(tp, FREAD);
-                       }
-                       tp->t_lflag |= EXTPROC;
-               } else {
-                       if ((tp->t_lflag & EXTPROC) &&
-                           (pti->pt_flags & PF_PKT)) {
-                               pti->pt_send |= TIOCPKT_IOCTL;
-                               ptcwakeup(tp, FREAD);
-                       }
-                       tp->t_lflag &= ~EXTPROC;
-               }
-               goto out;
-       } else
-#ifndef NeXT
-       if (cdevsw[major(dev)]->d_open == ptcopen)
-#else
-       if (cdevsw[major(dev)].d_open == ptcopen)
-#endif
-               switch (cmd) {
-
-               case TIOCGPGRP:
-                       /*
-                        * We aviod calling ttioctl on the controller since,
-                        * in that case, tp must be the controlling terminal.
-                        */
-                       *(int *)data = tp->t_pgrp ? tp->t_pgrp->pg_id : 0;
-                       goto out;
-
-               case TIOCPKT:
-                       if (*(int *)data) {
-                               if (pti->pt_flags & PF_UCNTL) {
-                                       error = EINVAL;
-                                       goto out;
-                               }
-                               pti->pt_flags |= PF_PKT;
-                       } else
-                               pti->pt_flags &= ~PF_PKT;
-                       goto out;
-
-               case TIOCUCNTL:
-                       if (*(int *)data) {
-                               if (pti->pt_flags & PF_PKT) {
-                                       error = EINVAL;
-                                       goto out;
-                               }
-                               pti->pt_flags |= PF_UCNTL;
-                       } else
-                               pti->pt_flags &= ~PF_UCNTL;
-                       goto out;
-
-               case TIOCREMOTE:
-                       if (*(int *)data)
-                               pti->pt_flags |= PF_REMOTE;
-                       else
-                               pti->pt_flags &= ~PF_REMOTE;
-                       ttyflush(tp, FREAD|FWRITE);
-                       goto out;

 
 

-#if COMPAT_43_TTY
-               case TIOCSETP:
-               case TIOCSETN:
-#endif
-               case TIOCSETD:
-               case TIOCSETA:
-               case TIOCSETAW:
-               case TIOCSETAF:
-                       ndflush(&tp->t_outq, tp->t_outq.c_cc);
-                       break;
+done:
+       _pty_driver.master = PTC_MAJOR;
+       _pty_driver.slave = PTS_MAJOR;
+       _pty_driver.open_reset = 1;
+       _pty_driver.open = &pty_get_ioctl;
+       _pty_driver.name = &pty_get_name;
+       tty_dev_register(&_pty_driver);

 
 

-               case TIOCSIG:
-                       if (*(unsigned int *)data >= NSIG ||
-                           *(unsigned int *)data == 0) {
-                               error = EINVAL;
-                               goto out;
-                       }
-                       if ((tp->t_lflag&NOFLSH) == 0)
-                               ttyflush(tp, FREAD|FWRITE);
-                       pgsignal(tp->t_pgrp, *(unsigned int *)data, 1);
-                       if ((*(unsigned int *)data == SIGINFO) &&
-                           ((tp->t_lflag&NOKERNINFO) == 0))
-                               ttyinfo(tp);
-                       goto out;
-               }
-       error = (*linesw[tp->t_line].l_ioctl)(tp, cmd, data, flag, p);
-       if (error == ENOTTY) {
-               error = ttioctl(tp, cmd, data, flag, p);
-               if (error == ENOTTY
-               &&  pti->pt_flags & PF_UCNTL && (cmd & ~0xff) == UIOCCMD(0)) {
-                       /* Process the UIOCMD ioctl group */
-                       if (cmd & 0xff) {
-                               pti->pt_ucntl = (u_char)cmd;
-                               ptcwakeup(tp, FREAD);
-                       }
-                       error = 0;
-                       goto out;
-               }
+       if (cdevsw_setkqueueok(PTC_MAJOR, &cdevsw[PTC_MAJOR], CDEVSW_IS_PTC) == -1) {
+               panic("Can't mark ptc as kqueue ok");

        }
        }

-
-       /*
-        * If external processing and packet mode send ioctl packet.
-        */
-       if ((tp->t_lflag&EXTPROC) && (pti->pt_flags & PF_PKT)) {
-               switch(cmd) {
-               case TIOCSETA:
-               case TIOCSETAW:
-               case TIOCSETAF:
-#if COMPAT_43_TTY
-               case TIOCSETP:
-               case TIOCSETN:
-#endif
-#if COMPAT_43_TTY || defined(COMPAT_SUNOS)
-               case TIOCSETC:
-               case TIOCSLTC:
-               case TIOCLBIS:
-               case TIOCLBIC:
-               case TIOCLSET:
-#endif
-                       pti->pt_send |= TIOCPKT_IOCTL;
-                       ptcwakeup(tp, FREAD);
-               default:
-                       break;
-               }
+       if (cdevsw_setkqueueok(PTS_MAJOR, &cdevsw[PTS_MAJOR], CDEVSW_IS_PTS) == -1) {
+               panic("Can't mark pts as kqueue ok");

        }
        }

-       stop = (tp->t_iflag & IXON) && CCEQ(cc[VSTOP], CTRL('s'))
-               && CCEQ(cc[VSTART], CTRL('q'));
-       if (pti->pt_flags & PF_NOSTOP) {
-               if (stop) {
-                       pti->pt_send &= ~TIOCPKT_NOSTOP;
-                       pti->pt_send |= TIOCPKT_DOSTOP;
-                       pti->pt_flags &= ~PF_NOSTOP;
-                       ptcwakeup(tp, FREAD);
-               }
-       } else {
-               if (!stop) {
-                       pti->pt_send &= ~TIOCPKT_DOSTOP;
-                       pti->pt_send |= TIOCPKT_NOSTOP;
-                       pti->pt_flags |= PF_NOSTOP;
-                       ptcwakeup(tp, FREAD);
-               }
-       }
-out:
-       (void) thread_funnel_set(kernel_flock, funnel_state);
-       return (error);
-}
-
-#ifndef NeXT
-static ptc_devsw_installed = 0;
-
-static void
-ptc_drvinit(void *unused)
-{
-#ifdef DEVFS
-       int i,j,k;
-#endif
-       dev_t dev;
-
-       if( ! ptc_devsw_installed ) {
-               dev = makedev(CDEV_MAJOR_S, 0);
-               cdevsw_add(&dev, &pts_cdevsw, NULL);
-               dev = makedev(CDEV_MAJOR_C, 0);
-               cdevsw_add(&dev, &ptc_cdevsw, NULL);
-               ptc_devsw_installed = 1;
-#ifdef DEVFS
-               for ( i = 0 ; i<NPTY ; i++ ) {
-                       j = i / 32;
-                       k = i % 32;
-                       devfs_token_pts[i] = 
-                               devfs_add_devswf(&pts_cdevsw,i,
-                                               DV_CHR,0,0,0666,
-                                               "tty%c%n",jnames[j],k);
-                       devfs_token_ptc[i] =
-                               devfs_add_devswf(&ptc_cdevsw,i,
-                                               DV_CHR,0,0,0666,
-                                               "pty%c%n",jnames[j],k);
-               }
-#endif
-       }
+       return 0;

 }
 }

-
-SYSINIT(ptcdev,SI_SUB_DRIVERS,SI_ORDER_MIDDLE+CDEV_MAJOR_C,ptc_drvinit,NULL)
-#endif /* !NeXT */
+#endif // DEVFS