usr/src/uts/common/io/tty_ptyconf.c

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License, Version 1.0 only
   6  * (the "License").  You may not use this file except in compliance
   7  * with the License.
   8  *
   9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  10  * or http://www.opensolaris.org/os/licensing.
  11  * See the License for the specific language governing permissions
  12  * and limitations under the License.
  13  *
  14  * When distributing Covered Code, include this CDDL HEADER in each
  15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  16  * If applicable, add the following below this CDDL HEADER, with the
  17  * fields enclosed by brackets "[]" replaced with your own identifying
  18  * information: Portions Copyright [yyyy] [name of copyright owner]
  19  *
  20  * CDDL HEADER END
  21  */
  22 /*
  23  * Copyright (c) 1987 by Sun Microsystems, Inc.
  24  */
  25
  26 #ident  "%Z%%M% %I%     %E% SMI"
  27                 /* SunOS-4.1 1.2        */
  28
  29 /*
  30  * Pseudo-terminal driver.
  31  *
  32  * Configuration dependent variables
  33  */
  34
  35 #include <sys/types.h>
  36 #include <sys/param.h>
  37 #include <sys/termios.h>
  38 #include <sys/stream.h>
  39 #include <sys/stropts.h>
  40 #include <sys/kmem.h>
  41 #include <sys/tty.h>
  42 #include <sys/ptyvar.h>
  43
  44 #ifndef NOLDPTY
  45 #define NOLDPTY 48              /* crude XXX */
  46 #endif
  47
  48 int     npty = NOLDPTY;
  49
  50 struct  pty *pty_softc;
  51
  52 struct pollhead ptcph;          /* poll head for ptcpoll() use */
  53
  54 /*
  55  * Allocate space for data structures at runtime.
  56  */
  57 void
  58 pty_initspace(void)
  59 {
  60         pty_softc = (struct pty *)
  61                 kmem_zalloc(npty * sizeof (struct pty), KM_SLEEP);
  62 }