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      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 }
     81