usr/src/cmd/getent/dogethost.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 #pragma ident   "%Z%%M% %I%     %E% SMI"
  23
  24 /*
  25  * Copyright (c) 1994-2000 by Sun Microsystems, Inc.
  26  * All rights reserved.
  27  */
  28
  29 #include <stdio.h>
  30 #include <stdlib.h>
  31 #include <sys/types.h>
  32 #include <sys/socket.h>
  33 #include <netinet/in.h>
  34 #include <arpa/inet.h>
  35 #include <string.h>
  36 #include <netdb.h>
  37 #include "getent.h"
  38
  39 static int
  40 puthostent(const struct hostent *hp, FILE *fp)
  41 {
  42         char **p;
  43         int rc = 0;
  44
  45         if (hp == NULL) {
  46                 return (1);
  47         }
  48
  49         for (p = hp->h_addr_list; *p != 0; p++) {
  50                 struct in_addr in;
  51                 char **q;
  52
  53                 (void) memcpy((char *)&in.s_addr, *p, sizeof (in));
  54                 if (fprintf(fp, "%s\t%s",
  55                         inet_ntoa(in), hp->h_name) == EOF)
  56                         rc = 1;
  57                 for (q = hp->h_aliases; *q != 0; q++) {
  58                         if (fprintf(fp, " %s", *q) == EOF)
  59                                 rc = 1;
  60                 }
  61                 if (putc('\n', fp) == EOF)
  62                         rc = 1;
  63         }
  64         return (rc);
  65 }
  66
  67 /*
  68  * gethostbyname/addr - get entries from hosts database
  69  */
  70 int
  71 dogethost(const char **list)
  72 {
  73         struct hostent *hp;
  74         int rc = EXC_SUCCESS;
  75
  76         if (list == NULL || *list == NULL) {
  77                 while ((hp = gethostent()) != NULL)
  78                         (void) puthostent(hp, stdout);
  79         } else {
  80                 for (; *list != NULL; list++) {
  81                         struct in_addr addr;
  82                         addr.s_addr = inet_addr(*list);
  83                         if (addr.s_addr != (in_addr_t)-1)
  84                                 hp = gethostbyaddr((char *)&addr,
  85                                         sizeof (addr), AF_INET);
  86                         else
  87                                 hp = gethostbyname(*list);
  88                         if (hp == NULL)
  89                                 rc = EXC_NAME_NOT_FOUND;
  90                         else
  91                                 (void) puthostent(hp, stdout);
  92                 }
  93         }
  94
  95         return (rc);
  96 }