usr/src/psm/promif/ieee1275/common/prom_stdin.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 2005 Sun Microsystems, Inc.  All rights reserved.
  24  * Use is subject to license terms.
  25  */
  26
  27 #pragma ident   "%Z%%M% %I%     %E% SMI"
  28
  29 #include <sys/promif.h>
  30 #include <sys/promimpl.h>
  31
  32 /*
  33  * Return ihandle of stdin
  34  */
  35 ihandle_t
  36 prom_stdin_ihandle(void)
  37 {
  38         static ihandle_t istdin;
  39         static char *name = "stdin";
  40
  41         if (istdin)
  42                 return (istdin);
  43
  44         if (prom_getproplen(prom_chosennode(), name) !=
  45             sizeof (ihandle_t))  {
  46 #if defined(PROMIF_DEBUG) || defined(lint)
  47                 prom_fatal_error("No stdout ihandle?");
  48 #endif
  49                 return (istdin = (ihandle_t)-1);
  50         }
  51         (void) prom_getprop(prom_chosennode(), name,
  52             (caddr_t)(&istdin));
  53         istdin = prom_decode_int(istdin);
  54         return (istdin);
  55 }
  56
  57 /*
  58  * Return phandle of stdin
  59  */
  60 pnode_t
  61 prom_stdin_node(void)
  62 {
  63         static phandle_t pstdin;
  64         ihandle_t istdin;
  65
  66         if (pstdin)
  67                 return (pstdin);
  68
  69         if ((istdin = prom_stdin_ihandle()) == (ihandle_t)-1)
  70                 return (pstdin = (pnode_t)OBP_BADNODE);
  71
  72         return (pstdin = prom_getphandle(istdin));
  73 }