revnetgroup.tproj/revnetgroup.c

   1 /*
   2  * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * "Portions Copyright (c) 1999 Apple Computer, Inc.  All Rights
   7  * Reserved.  This file contains Original Code and/or Modifications of
   8  * Original Code as defined in and that are subject to the Apple Public
   9  * Source License Version 1.0 (the 'License').  You may not use this file
  10  * except in compliance with the License.  Please obtain a copy of the
  11  * License at http://www.apple.com/publicsource and read it before using
  12  * this file.
  13  *
  14  * The Original Code and all software distributed under the License are
  15  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  16  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  17  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
  19  * License for the specific language governing rights and limitations
  20  * under the License."
  21  *
  22  * @APPLE_LICENSE_HEADER_END@
  23  */
  24 /* $OpenBSD: revnetgroup.c,v 1.1 1997/04/15 22:06:15 maja Exp $ */
  25 /*
  26  * Copyright (c) 1995
  27  *      Bill Paul <wpaul@ctr.columbia.edu>.  All rights reserved.
  28  *
  29  * Redistribution and use in source and binary forms, with or without
  30  * modification, are permitted provided that the following conditions
  31  * are met:
  32  * 1. Redistributions of source code must retain the above copyright
  33  *    notice, this list of conditions and the following disclaimer.
  34  * 2. Redistributions in binary form must reproduce the above copyright
  35  *    notice, this list of conditions and the following disclaimer in the
  36  *    documentation and/or other materials provided with the distribution.
  37  * 3. All advertising materials mentioning features or use of this software
  38  *    must display the following acknowledgement:
  39  *      This product includes software developed by Bill Paul.
  40  * 4. Neither the name of the author nor the names of any co-contributors
  41  *    may be used to endorse or promote products derived from this software
  42  *    without specific prior written permission.
  43  *
  44  * THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND
  45  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  46  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  47  * ARE DISCLAIMED.  IN NO EVENT SHALL Bill Paul OR CONTRIBUTORS BE LIABLE
  48  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  49  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  50  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  51  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  52  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  53  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  54  * SUCH DAMAGE.
  55  *
  56  * reverse netgroup map generator program
  57  *
  58  * Written by Bill Paul <wpaul@ctr.columbia.edu>
  59  * Center for Telecommunications Research
  60  * Columbia University, New York City
  61  *
  62  *      $FreeBSD: revnetgroup.c,v 1.7 1997/03/28 15:48:15 imp Exp $
  63  */
  64
  65 #include <stdio.h>
  66 #include <stdlib.h>
  67 #include <string.h>
  68 #include <errno.h>
  69 #include <err.h>
  70 #include "hash.h"
  71
  72 #ifndef lint
  73 static const char rcsid[] = "$OpenBSD: revnetgroup.c,v 1.1 1997/04/15 22:06:15 maja Exp $";
  74 #endif
  75
  76 /* Default location of netgroup file. */
  77 char *netgroup = "/etc/netgroup";
  78
  79 /* Stored hash table version of 'forward' netgroup database. */
  80 struct group_entry *gtable[TABLESIZE];
  81
  82 /*
  83  * Stored hash table of 'reverse' netgroup member database
  84  * which we will construct.
  85  */
  86 struct member_entry *mtable[TABLESIZE];
  87
  88 void usage(prog)
  89 char *prog;
  90 {
  91         fprintf (stderr,"usage: %s -u|-h [-f netgroup file]\n",prog);
  92         exit(1);
  93 }
  94
  95 extern char *optarg;
  96
  97 int
  98 main(argc, argv)
  99         int argc;
 100         char *argv[];
 101 {
 102         FILE *fp;
 103         char readbuf[LINSIZ];
 104         struct group_entry *gcur;
 105         struct member_entry *mcur;
 106         char *host, *user, *domain;
 107         int ch;
 108         char *key = NULL, *data = NULL;
 109         int hosts = -1, i;
 110
 111         if (argc < 2)
 112                 usage(argv[0]);
 113
 114         while ((ch = getopt(argc, argv, "uhf:")) != -1) {
 115                 switch(ch) {
 116                 case 'u':
 117                         if (hosts != -1) {
 118                                 warnx("please use only one of -u or -h");
 119                                 usage(argv[0]);
 120                         }
 121                         hosts = 0;
 122                         break;
 123                 case 'h':
 124                         if (hosts != -1) {
 125                                 warnx("please use only one of -u or -h");
 126                                 usage(argv[0]);
 127                         }
 128                         hosts = 1;
 129                         break;
 130                 case 'f':
 131                         netgroup = optarg;
 132                         break;
 133                 default:
 134                         usage(argv[0]);
 135                         break;
 136                 }
 137         }
 138
 139         if (hosts == -1)
 140                 usage(argv[0]);
 141
 142         if (strcmp(netgroup, "-")) {
 143                 if ((fp = fopen(netgroup, "r")) == NULL) {
 144                         err(1,netgroup);
 145                 }
 146         } else {
 147                 fp = stdin;
 148         }
 149
 150         /* Stuff all the netgroup names and members into a hash table. */
 151         while (fgets(readbuf, LINSIZ, fp)) {
 152                 if (readbuf[0] == '#')
 153                         continue;
 154                 /* handle backslash line continuations */
 155                 while(readbuf[strlen(readbuf) - 2] == '\\') {
 156                         fgets((char *)&readbuf[strlen(readbuf) - 2],
 157                                         sizeof(readbuf) - strlen(readbuf), fp);
 158                 }
 159                 data = NULL;
 160                 if ((data = (char *)(strpbrk(readbuf, " \t") + 1)) < (char *)2)
 161                         continue;
 162                 key = (char *)&readbuf;
 163                 *(data - 1) = '\0';
 164                 store(gtable, key, data);
 165         }
 166
 167         fclose(fp);
 168
 169         /*
 170          * Find all members of each netgroup and keep track of which
 171          * group they belong to.
 172          */
 173         for (i = 0; i < TABLESIZE; i++) {
 174                 gcur = gtable[i];
 175                 while(gcur) {
 176                         __setnetgrent(gcur->key);
 177                         while(__getnetgrent(&host, &user, &domain) != NULL) {
 178                                 if (hosts) {
 179                                         if (!(host && !strcmp(host,"-"))) {
 180                                                 mstore(mtable,
 181                                                        host ? host : "*",
 182                                                        gcur->key,
 183                                                        domain ? domain : "*");
 184                                         }
 185                                 } else {
 186                                         if (!(user && !strcmp(user,"-"))) {
 187                                                 mstore(mtable,
 188                                                        user ? user : "*",
 189                                                        gcur->key,
 190                                                        domain ? domain : "*");
 191                                         }
 192                                 }
 193                         }
 194                         gcur = gcur->next;
 195                 }
 196         }
 197
 198         /* Release resources used by the netgroup parser code. */
 199         __endnetgrent();
 200
 201         /* Spew out the results. */
 202         for (i = 0; i < TABLESIZE; i++) {
 203                 mcur = mtable[i];
 204                 while(mcur) {
 205                         struct grouplist *tmp;
 206                         printf ("%s.%s\t", mcur->key, mcur->domain);
 207                         tmp = mcur->groups;
 208                         while(tmp) {
 209                                 printf ("%s", tmp->groupname);
 210                                 tmp = tmp->next;
 211                                 if (tmp)
 212                                         printf(",");
 213                         }
 214                         mcur = mcur->next;
 215                         printf ("\n");
 216                 }
 217         }
 218
 219         /* Let the OS free all our resources. */
 220         exit(0);
 221 }