usr.sbin/ypserv/revnetgroup/revnetgroup.c

   1 /*      $NetBSD: revnetgroup.c,v 1.13 2004/10/30 16:01:48 dsl Exp $ */
   2
   3 /*
   4  * Copyright (c) 1995
   5  *      Bill Paul <wpaul@ctr.columbia.edu>.  All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. All advertising materials mentioning features or use of this software
  16  *    must display the following acknowledgement:
  17  *      This product includes software developed by Bill Paul.
  18  * 4. Neither the name of the author nor the names of any co-contributors
  19  *    may be used to endorse or promote products derived from this software
  20  *    without specific prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND
  23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  25  * ARE DISCLAIMED.  IN NO EVENT SHALL Bill Paul OR CONTRIBUTORS BE LIABLE
  26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32  * SUCH DAMAGE.
  33  *
  34  * reverse netgroup map generator program
  35  *
  36  * Written by Bill Paul <wpaul@ctr.columbia.edu>
  37  * Center for Telecommunications Research
  38  * Columbia University, New York City
  39  *
  40  */
  41
  42 #include <sys/cdefs.h>
  43 #ifndef lint
  44 __RCSID("$NetBSD: revnetgroup.c,v 1.13 2004/10/30 16:01:48 dsl Exp $");
  45 #endif
  46
  47 #include <ctype.h>
  48 #include <err.h>
  49 #include <errno.h>
  50 #include <stdio.h>
  51 #include <stdlib.h>
  52 #include <string.h>
  53 #include <unistd.h>
  54
  55 #include "hash.h"
  56 #include "protos.h"
  57
  58 int     main(int, char *[]);
  59 void    usage(void);
  60
  61
  62
  63 /* Default location of netgroup file. */
  64 const char *netgroup = "/etc/netgroup";
  65
  66 /* Stored hash table version of 'forward' netgroup database. */
  67 struct group_entry *gtable[TABLESIZE];
  68
  69 /*
  70  * Stored hash table of 'reverse' netgroup member database
  71  * which we will construct.
  72  */
  73 struct member_entry *mtable[TABLESIZE];
  74
  75 void
  76 usage(void)
  77 {
  78
  79         fprintf (stderr,"usage: %s -u|-h [-f netgroup file]\n", getprogname());
  80         exit(1);
  81 }
  82
  83 int
  84 main(int argc, char *argv[])
  85 {
  86         struct group_entry *gcur;
  87         struct member_entry *mcur;
  88         FILE    *fp;
  89         char    *line, *p, *host, *user, *domain;
  90         int      ch, i;
  91         size_t   len;
  92         char    *key;
  93         int      hosts = -1;
  94
  95         if (argc < 2)
  96                 usage();
  97
  98         while ((ch = getopt(argc, argv, "uhf:")) != -1) {
  99                 switch(ch) {
 100                 case 'u':
 101                         if (hosts != -1) {
 102                                 warnx("please use only one of -u or -h");
 103                                 usage();
 104                         }
 105                         hosts = 0;
 106                         break;
 107                 case 'h':
 108                         if (hosts != -1) {
 109                                 warnx("please use only one of -u or -h");
 110                                 usage();
 111                         }
 112                         hosts = 1;
 113                         break;
 114                 case 'f':
 115                         netgroup = optarg;
 116                         break;
 117                 default:
 118                         usage();
 119                         break;
 120                 }
 121         }
 122
 123         if (hosts == -1)
 124                 usage();
 125
 126         if (strcmp(netgroup, "-")) {
 127                 if ((fp = fopen(netgroup, "r")) == NULL) {
 128                         err(1, "%s", netgroup);
 129                 }
 130         } else {
 131                 fp = stdin;
 132         }
 133
 134         /* Stuff all the netgroup names and members into a hash table. */
 135         for (;
 136             (line = fparseln(fp, &len, NULL, NULL, FPARSELN_UNESCALL));
 137             free(line)) {
 138                 if (len == 0)
 139                         continue;
 140                 p = line;
 141
 142                 for (key = p; *p && isspace((unsigned char)*p) == 0; p++)
 143                         ;
 144                 while (*p && isspace((unsigned char)*p))
 145                         *p++ = '\0';
 146                 store(gtable, key, p);
 147         }
 148
 149         fclose(fp);
 150
 151         /*
 152          * Find all members of each netgroup and keep track of which
 153          * group they belong to.
 154          */
 155         for (i = 0; i < TABLESIZE; i++) {
 156                 gcur = gtable[i];
 157                 while (gcur) {
 158                         rng_setnetgrent(gcur->key);
 159                         while (rng_getnetgrent(&host, &user, &domain) != 0) {
 160                                 if (hosts) {
 161                                         if (!(host && !strcmp(host,"-"))) {
 162                                                 mstore(mtable,
 163                                                        host ? host : "*",
 164                                                        gcur->key,
 165                                                        domain ? domain : "*");
 166                                         }
 167                                 } else {
 168                                         if (!(user && !strcmp(user,"-"))) {
 169                                                 mstore(mtable,
 170                                                        user ? user : "*",
 171                                                        gcur->key,
 172                                                        domain ? domain : "*");
 173                                         }
 174                                 }
 175                         }
 176                         gcur = gcur->next;
 177                 }
 178         }
 179
 180         /* Release resources used by the netgroup parser code. */
 181         rng_endnetgrent();
 182
 183         /* Spew out the results. */
 184         for (i = 0; i < TABLESIZE; i++) {
 185                 mcur = mtable[i];
 186                 while (mcur) {
 187                         struct grouplist *tmp;
 188                         printf ("%s.%s\t", mcur->key, mcur->domain);
 189                         tmp = mcur->groups;
 190                         while (tmp) {
 191                                 printf ("%s", tmp->groupname);
 192                                 tmp = tmp->next;
 193                                 if (tmp)
 194                                         printf(",");
 195                         }
 196                         mcur = mcur->next;
 197                         printf ("\n");
 198                 }
 199         }
 200
 201         /* Let the OS free all our resources. */
 202         exit(0);
 203 }