usr/src/cmd/getent/dogetnet.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 #ident  "%Z%%M% %I%     %E% SMI"
  23
  24 /*
  25  * Copyright (c) 1994, by Sun Microsystems, Inc.
  26  * All rights reserved.
  27  */
  28
  29 #include <stdio.h>
  30 #include <stdlib.h>
  31 #include <string.h>
  32 #include <sys/types.h>
  33 #include <sys/socket.h>
  34 #include <netinet/in.h>
  35 #include <arpa/inet.h>
  36 #include <netdb.h>
  37 #include "getent.h"
  38
  39 /*
  40  * Print a network number such as 129.144
  41  */
  42 char *
  43 inet_nettoa(struct in_addr in)
  44 {
  45         u_long addr = htonl(in.s_addr);
  46         u_char *up = (u_char *)&addr;
  47         static char result[256];
  48
  49         /* Omit leading zeros */
  50         if (up[0]) {
  51                 (void) sprintf(result, "%d.%d.%d.%d",
  52                     up[0], up[1], up[2], up[3]);
  53         } else if (up[1]) {
  54                 (void) sprintf(result, "%d.%d.%d", up[1], up[2], up[3]);
  55         } else if (up[2]) {
  56                 (void) sprintf(result, "%d.%d", up[2], up[3]);
  57         } else {
  58                 (void) sprintf(result, "%d", up[3]);
  59         }
  60         return (result);
  61 }
  62
  63 static int
  64 putnetent(const struct netent *np, FILE *fp)
  65 {
  66         char **p;
  67         int rc = 0;
  68         struct in_addr in;
  69
  70         if (np == NULL) {
  71                 return (1);
  72         }
  73
  74         in.s_addr = np->n_net;
  75         if (fprintf(fp, "%-20s %s",
  76                     np->n_name, inet_nettoa(in)) == EOF)
  77                 rc = 1;
  78         for (p = np->n_aliases; *p != 0; p++) {
  79                 if (fprintf(fp, " %s", *p) == EOF)
  80                         rc = 1;
  81         }
  82         if (putc('\n', fp) == EOF)
  83                 rc = 1;
  84         return (rc);
  85 }
  86
  87 /*
  88  * getnetbyname/addr - get entries from network database
  89  */
  90 int
  91 dogetnet(const char **list)
  92 {
  93         struct netent *np;
  94         int rc = EXC_SUCCESS;
  95
  96         if (list == NULL || *list == NULL) {
  97                 while ((np = getnetent()) != NULL)
  98                         (void) putnetent(np, stdout);
  99         } else {
 100                 for (; *list != NULL; list++) {
 101                         long addr = inet_network(*list);
 102                         if (addr != -1)
 103                                 np = getnetbyaddr(addr, AF_INET);
 104                         else
 105                                 np = getnetbyname(*list);
 106                         if (np == NULL)
 107                                 rc = EXC_NAME_NOT_FOUND;
 108                         else
 109                                 (void) putnetent(np, stdout);
 110                 }
 111         }
 112
 113         return (rc);
 114 }