usr/src/cmd/cmd-inet/common/compat.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 2003 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 <deflt.h>
  30 #include <string.h>
  31 #include <stddef.h>
  32 #include <stdlib.h>
  33 #include <stdio.h>
  34 #include <compat.h>
  35
  36 #define DEFAULT_IP_LINE         DEFAULT_IP"="
  37
  38 /*
  39  * Code to handle /etc/default/ file for IPv4 command output compatibility
  40  *
  41  * Note: Handles BOTH the same as IP_VERSION6.
  42  *
  43  * Returns 1 if IP_VERSION4; 0 for other versions.
  44  * Returns -1 if the value of DEFAULT_IP found in /etc/default/inet_type is
  45  * invalid.
  46  */
  47 int
  48 get_compat_flag(char **value)
  49 {
  50         if (defopen(INET_DEFAULT_FILE) == 0) {
  51                 char    *cp;
  52                 int     flags;
  53
  54                 /*
  55                  * ignore case
  56                  */
  57                 flags = defcntl(DC_GETFLAGS, 0);
  58                 TURNOFF(flags, DC_CASE);
  59                 (void) defcntl(DC_SETFLAGS, flags);
  60
  61                 if (cp = defread(DEFAULT_IP_LINE))
  62                         *value = strdup(cp);
  63
  64                 /* close */
  65                 (void) defopen((char *)NULL);
  66
  67                 if (*value != NULL) {
  68                         if (strcasecmp(*value, "IP_VERSION4") == 0) {
  69                                 return (DEFAULT_PROT_V4_ONLY);
  70                         } else if (strcasecmp(*value, "BOTH") == 0 ||
  71                             strcasecmp(*value, "IP_VERSION6") == 0) {
  72                                 return (DEFAULT_PROT_BOTH);
  73                         } else {
  74                                 return (DEFAULT_PROT_BAD_VALUE);
  75                         }
  76                 }
  77         }
  78         /* No value set */
  79         return (DEFAULT_PROT_BOTH);
  80 }