usr/src/cmd/getent/dogetethers.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 1994,2002 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 <stdio.h>
  30 #include <stdlib.h>
  31 #include <netdb.h>
  32 #include <sys/types.h>
  33 #include <sys/socket.h>
  34 #include <net/if.h>
  35 #include <netinet/in.h>
  36 #include <netinet/if_ether.h>
  37 #include "getent.h"
  38
  39 static int
  40 putethers(const char *hostname, const struct ether_addr *e, FILE *fp)
  41 {
  42         if (hostname == NULL || e == NULL)
  43                 return (EXC_SYNTAX);
  44
  45         if (fprintf(fp, "%-20s %s\n", hostname, ether_ntoa(e)) == EOF)
  46                 return (EXC_SYNTAX); /* for lack of a better error code */
  47         return (EXC_SUCCESS);
  48 }
  49
  50 /*
  51  * ether_ntohost/hostton - get entries from ethers database
  52  */
  53 int
  54 dogetethers(const char **list)
  55 {
  56         int rc = EXC_SUCCESS;
  57
  58         if (list == NULL || *list == NULL) {
  59                 rc = EXC_ENUM_NOT_SUPPORTED;
  60         } else {
  61                 for (; *list != NULL; list++) {
  62                         struct ether_addr ea;
  63                         struct ether_addr *e;
  64                         char hostname[MAXHOSTNAMELEN + 1];
  65                         char *hp;
  66                         int     retval;
  67
  68                         if ((e = ether_aton(*list)) != NULL) {
  69                                 hp = hostname;
  70                                 retval = ether_ntohost(hp, e);
  71                         } else {
  72                                 hp = (char *)*list;
  73                                 e = &ea;
  74                                 retval = ether_hostton(hp, e);
  75                         }
  76                         if (retval != 0)
  77                                 rc = EXC_NAME_NOT_FOUND;
  78                         else
  79                                 rc = putethers(hp, e, stdout);
  80                 }
  81         }
  82
  83         return (rc);
  84 }