revnetgroup.tproj/revnetgroup.c

   1 /*
   2  * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
   7  *
   8  * This file contains Original Code and/or Modifications of Original Code
   9  * as defined in and that are subject to the Apple Public Source License
  10  * Version 2.0 (the 'License'). You may not use this file except in
  11  * compliance with the License. Please obtain a copy of the License at
  12  * http://www.opensource.apple.com/apsl/ and read it before using this
  13  * file.
  14  *
  15  * The Original Code and all software distributed under the License are
  16  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  17  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  18  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  20  * Please see the License for the specific language governing rights and
  21  * limitations under the License.
  22  *
  23  * @APPLE_LICENSE_HEADER_END@
  24  */
  25 /* $OpenBSD: revnetgroup.c,v 1.1 1997/04/15 22:06:15 maja Exp $ */
  26 /*
  27  * Copyright (c) 1995
  28  *      Bill Paul <wpaul@ctr.columbia.edu>.  All rights reserved.
  29  *
  30  * Redistribution and use in source and binary forms, with or without
  31  * modification, are permitted provided that the following conditions
  32  * are met:
  33  * 1. Redistributions of source code must retain the above copyright
  34  *    notice, this list of conditions and the following disclaimer.
  35  * 2. Redistributions in binary form must reproduce the above copyright
  36  *    notice, this list of conditions and the following disclaimer in the
  37  *    documentation and/or other materials provided with the distribution.
  38  * 3. All advertising materials mentioning features or use of this software
  39  *    must display the following acknowledgement:
  40  *      This product includes software developed by Bill Paul.
  41  * 4. Neither the name of the author nor the names of any co-contributors
  42  *    may be used to endorse or promote products derived from this software
  43  *    without specific prior written permission.
  44  *
  45  * THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND
  46  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  47  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  48  * ARE DISCLAIMED.  IN NO EVENT SHALL Bill Paul OR CONTRIBUTORS BE LIABLE
  49  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  50  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  51  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  52  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  53  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  54  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  55  * SUCH DAMAGE.
  56  *
  57  * reverse netgroup map generator program
  58  *
  59  * Written by Bill Paul <wpaul@ctr.columbia.edu>
  60  * Center for Telecommunications Research
  61  * Columbia University, New York City
  62  *
  63  *      $FreeBSD: revnetgroup.c,v 1.7 1997/03/28 15:48:15 imp Exp $
  64  */
  65
  66 #include <stdio.h>
  67 #include <stdlib.h>
  68 #include <string.h>
  69 #include <errno.h>
  70 #include <err.h>
  71 #include "hash.h"
  72
  73 #ifndef lint
  74 static const char rcsid[] = "$OpenBSD: revnetgroup.c,v 1.1 1997/04/15 22:06:15 maja Exp $";
  75 #endif
  76
  77 /* Default location of netgroup file. */
  78 char *netgroup = "/etc/netgroup";
  79
  80 /* Stored hash table version of 'forward' netgroup database. */
  81 struct group_entry *gtable[TABLESIZE];
  82
  83 /*
  84  * Stored hash table of 'reverse' netgroup member database
  85  * which we will construct.
  86  */
  87 struct member_entry *mtable[TABLESIZE];
  88
  89 void usage(prog)
  90 char *prog;
  91 {
  92         fprintf (stderr,"usage: %s -u|-h [-f netgroup file]\n",prog);
  93         exit(1);
  94 }
  95
  96 extern char *optarg;
  97
  98 int
  99 main(argc, argv)
 100         int argc;
 101         char *argv[];
 102 {
 103         FILE *fp;
 104         char readbuf[LINSIZ];
 105         struct group_entry *gcur;
 106         struct member_entry *mcur;
 107         char *host, *user, *domain;
 108         int ch;
 109         char *key = NULL, *data = NULL;
 110         int hosts = -1, i;
 111
 112         if (argc < 2)
 113                 usage(argv[0]);
 114
 115         while ((ch = getopt(argc, argv, "uhf:")) != -1) {
 116                 switch(ch) {
 117                 case 'u':
 118                         if (hosts != -1) {
 119                                 warnx("please use only one of -u or -h");
 120                                 usage(argv[0]);
 121                         }
 122                         hosts = 0;
 123                         break;
 124                 case 'h':
 125                         if (hosts != -1) {
 126                                 warnx("please use only one of -u or -h");
 127                                 usage(argv[0]);
 128                         }
 129                         hosts = 1;
 130                         break;
 131                 case 'f':
 132                         netgroup = optarg;
 133                         break;
 134                 default:
 135                         usage(argv[0]);
 136                         break;
 137                 }
 138         }
 139
 140         if (hosts == -1)
 141                 usage(argv[0]);
 142
 143         if (strcmp(netgroup, "-")) {
 144                 if ((fp = fopen(netgroup, "r")) == NULL) {
 145                         err(1,netgroup);
 146                 }
 147         } else {
 148                 fp = stdin;
 149         }
 150
 151         /* Stuff all the netgroup names and members into a hash table. */
 152         while (fgets(readbuf, LINSIZ, fp)) {
 153                 if (readbuf[0] == '#')
 154                         continue;
 155                 /* handle backslash line continuations */
 156                 while(readbuf[strlen(readbuf) - 2] == '\\') {
 157                         fgets((char *)&readbuf[strlen(readbuf) - 2],
 158                                         sizeof(readbuf) - strlen(readbuf), fp);
 159                 }
 160                 data = NULL;
 161                 if ((data = (char *)(strpbrk(readbuf, " \t") + 1)) < (char *)2)
 162                         continue;
 163                 key = (char *)&readbuf;
 164                 *(data - 1) = '\0';
 165                 store(gtable, key, data);
 166         }
 167
 168         fclose(fp);
 169
 170         /*
 171          * Find all members of each netgroup and keep track of which
 172          * group they belong to.
 173          */
 174         for (i = 0; i < TABLESIZE; i++) {
 175                 gcur = gtable[i];
 176                 while(gcur) {
 177                         __setnetgrent(gcur->key);
 178                         while(__getnetgrent(&host, &user, &domain) != NULL) {
 179                                 if (hosts) {
 180                                         if (!(host && !strcmp(host,"-"))) {
 181                                                 mstore(mtable,
 182                                                        host ? host : "*",
 183                                                        gcur->key,
 184                                                        domain ? domain : "*");
 185                                         }
 186                                 } else {
 187                                         if (!(user && !strcmp(user,"-"))) {
 188                                                 mstore(mtable,
 189                                                        user ? user : "*",
 190                                                        gcur->key,
 191                                                        domain ? domain : "*");
 192                                         }
 193                                 }
 194                         }
 195                         gcur = gcur->next;
 196                 }
 197         }
 198
 199         /* Release resources used by the netgroup parser code. */
 200         __endnetgrent();
 201
 202         /* Spew out the results. */
 203         for (i = 0; i < TABLESIZE; i++) {
 204                 mcur = mtable[i];
 205                 while(mcur) {
 206                         struct grouplist *tmp;
 207                         printf ("%s.%s\t", mcur->key, mcur->domain);
 208                         tmp = mcur->groups;
 209                         while(tmp) {
 210                                 printf ("%s", tmp->groupname);
 211                                 tmp = tmp->next;
 212                                 if (tmp)
 213                                         printf(",");
 214                         }
 215                         mcur = mcur->next;
 216                         printf ("\n");
 217                 }
 218         }
 219
 220         /* Let the OS free all our resources. */
 221         exit(0);
 222 }