usr/src/cmd/ypcmd/ypalias.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  * 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
  45 extern void sysvconfig();
  46 #endif
  47
  48 extern 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
  58 static void
  59 mkdomain_alias(name, result)
  60 char *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  */
  87 static void
  88 mkmap_alias(name, result)
  89 char *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
 118 static char usage[] =
 119 "Usage:\n\
 120         ypalias -d domainname\n\
 121         ypalias mapname\n";
 122
 123 int
 124 main(argc, argv)
 125 char **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);
 143 err:
 144         (void) fprintf(stderr, usage);
 145         return (1);
 146 }
 147 #endif /* MAIN */