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 #include <stdio.h>
  36 #include <string.h>
  37 #include <limits.h>
  38 #include <sys/types.h>
  39 #include <sys/statvfs.h>
  40 #include "ypsym.h"
  41
  42 #ifdef SYSVCONFIG
  43 extern void sysvconfig();
  44 #endif
  45
  46 extern int yp_getalias();
  47
  48 /*
  49  *      Given a domain name, return its system v alias.
  50  *      If there is no alias name in the alias file,
  51  *      create one. Rule of creation is to take the 1st
  52  *      NAME_MAX-4 characters and concatenate the last 4 characters.
  53  *      If the alias in the file is too long, trim off the end.
  54  */
  55
  56 static void
  57 mkdomain_alias(name, result)
  58 char *name, *result;
  59 {
  60         int retval;
  61         char tmpbuf[MAXNAMLEN] = {0};
  62
  63         retval = yp_getalias(name, result, NAME_MAX);
  64         if (retval == -1) {
  65                 if ((int)strlen(name) > NAME_MAX) {
  66                         strncpy(result, name, NAME_MAX-4);
  67                         strncpy(&result[NAME_MAX-4],
  68                             &name[strlen(name)-4], 4);
  69                         result[NAME_MAX] = '\0';
  70                 } else
  71                         strcpy(result, name);
  72         } else if ((retval) && (int)strlen(result) > NAME_MAX) {
  73                 strncpy(tmpbuf, result, NAME_MAX);
  74                 strcpy(result, tmpbuf);
  75         }
  76 }
  77
  78 /*
  79  *      Given a map name, return its system v alias .
  80  *      If there is no alias name in the alias file,
  81  *      create one. Rule of creation is to take the 1st
  82  *      MAXALIASLEN-4 characters and concatenate the last 4 characters.
  83  *      If the alias in the file is too long, trim off the end.
  84  */
  85 static void
  86 mkmap_alias(name, result)
  87 char *name, *result;
  88 {
  89         int retval;
  90         char tmpbuf[MAXNAMLEN] = {0};
  91
  92         retval = yp_getalias(name, result, MAXALIASLEN);
  93
  94         if (retval == -1) {
  95                 if ((int)strlen(name) > MAXALIASLEN) {
  96                         (void) strncpy(result, name, MAXALIASLEN-4);
  97                         (void) strncpy(&result[MAXALIASLEN-4],
  98                             &name[strlen(name)-4], 4);
  99                         result[MAXALIASLEN] = '\0';
 100                 } else
 101                         (void) strcpy(result, name);
 102         } else if ((retval) && (int)strlen(result) > MAXALIASLEN) {
 103                 (void) strncpy(tmpbuf, result, MAXALIASLEN);
 104                 (void) strcpy(result, tmpbuf);
 105         }
 106 }
 107
 108 #ifdef MAIN
 109
 110 /*
 111  * executed only for the command ypalias
 112  * and not when ypbind or ypserv make use
 113  * of this file.
 114  */
 115
 116 static char usage[] =
 117 "Usage:\n\
 118         ypalias -d domainname\n\
 119         ypalias mapname\n";
 120
 121 int
 122 main(argc, argv)
 123 char **argv;
 124 {
 125         char result[MAXNAMLEN] = {0};
 126
 127 #ifdef SYSVCONFIG
 128         sysvconfig();
 129 #endif
 130         if (argc <= 1)
 131                 goto err;
 132         if (strcmp(argv[1], "-d") == 0)
 133                 if (argc == 3) mkdomain_alias(argv[2], (char *)&result);
 134                 else goto err;
 135         else if (argc == 2)
 136                 mkmap_alias(argv[1], (char *)&result);
 137         else
 138                 goto err;
 139         (void) printf("%s", result);
 140         return (0);
 141 err:
 142         (void) fprintf(stderr, usage);
 143         return (1);
 144 }
 145 #endif /* MAIN */