usr/src/psm/promif/ieee1275/common/prom_devname.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) 1991-1994, by Sun Microsystems, Inc.
  24  * All rights reserved.
  25  */
  26
  27 #pragma ident   "%Z%%M% %I%     %E% SMI"
  28
  29 #include <sys/promif.h>
  30 #include <sys/promimpl.h>
  31
  32 int
  33 prom_devname_from_pathname(register char *pathname, register char *buffer)
  34 {
  35         register char *p;
  36
  37         if ((pathname == NULL) || (*pathname == '\0'))
  38                 return (-1);
  39
  40         p = prom_strrchr(pathname, '/');
  41         if (p == 0)
  42                 return (-1);
  43
  44         p++;
  45         while (*p != 0)  {
  46                 *buffer++ = *p++;
  47                 if ((*p == '@') || (*p == ':'))
  48                         break;
  49         }
  50         *buffer = '\0';
  51
  52         return (0);
  53 }
  54
  55 /*
  56  * Get base device name of stdin/stdout device into callers buffer.
  57  * Return 0 if successful; -1 otherwise.
  58  */
  59
  60 int
  61 prom_stdin_devname(char *buffer)
  62 {
  63         return (prom_devname_from_pathname(prom_stdinpath(), buffer));
  64 }
  65
  66 int
  67 prom_stdout_devname(char *buffer)
  68 {
  69         return (prom_devname_from_pathname(prom_stdoutpath(), buffer));
  70 }
  71
  72 /*
  73  * Return 1 if stdin/stdout are on the same device and subdevice.
  74  * Return 0, otherwise.
  75  */
  76
  77 int
  78 prom_stdin_stdout_equivalence(void)
  79 {
  80         register char *s, *p;
  81
  82         s = prom_stdinpath();
  83         p = prom_stdoutpath();
  84
  85         if ((s != NULL) && (p != NULL))  {
  86                 return (prom_strcmp(s, p) == 0 ? 1:0);
  87         }
  88
  89         return (0);
  90 }
  91
  92 /*
  93  *      This just returns a pointer to the option's part of the
  94  *      last part of the string.  Useful for determining which is
  95  *      the boot partition, tape file or channel of the DUART.
  96  */
  97 char *
  98 prom_path_options(register char *path)
  99 {
 100         register char *p, *s;
 101
 102         s = prom_strrchr(path, '/');
 103         if (s == NULL)
 104                 return (NULL);
 105         p = prom_strrchr(s, ':');
 106         if (p == NULL)
 107                 return (NULL);
 108         return (p+1);
 109 }