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 * Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
23 * Use is subject to license terms.
24 */
25
26/*	Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */
27/*	  All Rights Reserved   */
28
29/*
30 * Portions of this source code were derived from Berkeley
31 * under license from the Regents of the University of
32 * California.
33 */
34
35#pragma ident	"%Z%%M%	%I%	%E% SMI"
36
37#include <stdio.h>
38#include <string.h>
39#include <limits.h>
40#include <sys/types.h>
41#include <sys/statvfs.h>
42#include "ypsym.h"
43
44#ifdef SYSVCONFIG
45extern void sysvconfig();
46#endif
47
48extern int yp_getalias();
49
50/*
51 *	Given a domain name, return its system v alias.
52 *	If there is no alias name in the alias file,
53 *	create one. Rule of creation is to take the 1st
54 *	NAME_MAX-4 characters and concatenate the last 4 characters.
55 *	If the alias in the file is too long, trim off the end.
56 */
57
58static void
59mkdomain_alias(name, result)
60char *name, *result;
61{
62	int retval;
63	char tmpbuf[MAXNAMLEN] = {NULL};
64
65	retval = yp_getalias(name, result, NAME_MAX);
66	if (retval == -1) {
67		if ((int)strlen(name) > NAME_MAX) {
68			strncpy(result, name, NAME_MAX-4);
69			strncpy(&result[NAME_MAX-4],
70			    &name[strlen(name)-4], 4);
71			result[NAME_MAX] = '\0';
72		} else
73			strcpy(result, name);
74	} else if ((retval) && (int)strlen(result) > NAME_MAX) {
75		strncpy(tmpbuf, result, NAME_MAX);
76		strcpy(result, tmpbuf);
77	}
78}
79
80/*
81 *	Given a map name, return its system v alias .
82 *	If there is no alias name in the alias file,
83 *	create one. Rule of creation is to take the 1st
84 *	MAXALIASLEN-4 characters and concatenate the last 4 characters.
85 *	If the alias in the file is too long, trim off the end.
86 */
87static void
88mkmap_alias(name, result)
89char *name, *result;
90{
91	int retval;
92	char tmpbuf[MAXNAMLEN] = {NULL};
93
94	retval = yp_getalias(name, result, MAXALIASLEN);
95
96	if (retval == -1) {
97		if ((int)strlen(name) > MAXALIASLEN) {
98			(void) strncpy(result, name, MAXALIASLEN-4);
99			(void) strncpy(&result[MAXALIASLEN-4],
100			    &name[strlen(name)-4], 4);
101			result[MAXALIASLEN] = '\0';
102		} else
103			(void) strcpy(result, name);
104	} else if ((retval) && (int)strlen(result) > MAXALIASLEN) {
105		(void) strncpy(tmpbuf, result, MAXALIASLEN);
106		(void) strcpy(result, tmpbuf);
107	}
108}
109
110#ifdef MAIN
111
112/*
113 * executed only for the command ypalias
114 * and not when ypbind or ypserv make use
115 * of this file.
116 */
117
118static char usage[] =
119"Usage:\n\
120	ypalias -d domainname\n\
121	ypalias mapname\n";
122
123int
124main(argc, argv)
125char **argv;
126{
127	char result[MAXNAMLEN] = {NULL};
128
129#ifdef SYSVCONFIG
130	sysvconfig();
131#endif
132	if (argc <= 1)
133		goto err;
134	if (strcmp(argv[1], "-d") == 0)
135		if (argc == 3) mkdomain_alias(argv[2], (char *)&result);
136		else goto err;
137	else if (argc == 2)
138		mkmap_alias(argv[1], (char *)&result);
139	else
140		goto err;
141	(void) printf("%s", result);
142	return (0);
143err:
144	(void) fprintf(stderr, usage);
145	return (1);
146}
147#endif /* MAIN */
148